CN106707069A - Insulation tube bus electro-thermal accelerated ageing test device and method - Google Patents
Insulation tube bus electro-thermal accelerated ageing test device and method Download PDFInfo
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- CN106707069A CN106707069A CN201710081420.0A CN201710081420A CN106707069A CN 106707069 A CN106707069 A CN 106707069A CN 201710081420 A CN201710081420 A CN 201710081420A CN 106707069 A CN106707069 A CN 106707069A
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- tube type
- insulating tube
- type busbar
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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Abstract
The present invention discloses an insulation tube bus electro-thermal accelerated ageing test device and method. The device comprises a support frame portion, a pressure portion and a temperature control portion. The support frame portion is configured to arrange and fix an insulation tube bus sample. The pressure portion is configured to provide high voltage for the insulation tube bus. The temperature control portion is configured to display, record and regulate the temperature of the inner wall of an inertial conductor in real time. Through adoption of the heating mode in the carbon fiber quartz electrical heated tube, the insulation tube bus electro-thermal accelerated ageing test device and method can more truly simulate the operation environment of the insulation tube bus, and the experiment result has more research values. The insulation tube bus electro-thermal accelerated ageing test device and method can perform electro-thermal accelerated ageing test of a plurality of insulation tube buses with different specifications and can satisfy the requirements of a plurality of electro-thermal accelerated ageing test schemes. The insulation tube bus electro-thermal accelerated ageing test device is compact and reasonable in structure design, high in utility rate of the space and small in floor space, and has high practicality and applicability. A fiber temperature sensor is employed to avoid the influence of high voltage on the temperature measurement so as to improve the precision of the temperature control.
Description
Technical field
The present invention relates to insulating tube type busbar dielectric level detection technique field, specifically a kind of insulating tube type busbar electric heating
Accelerated aging tester and method.
Background technology
With the high speed development of national economy, entire society increasingly increases the demand of electric power, and transforming plant main transformer capacity is not
Disconnected to increase, the rated current that transformer low voltage enters line side is also being continued to increase, and conventional rectangular bus is technically got over in structure
To be more difficult to meet bus heating and the requirement of short-circuit electromotive force, insulating tube type busbar substitutes the new of conventional rectangular bus as a kind of
Type transmission facility, because it has the notable technologies such as current-carrying capacity is big, high mechanical strength, electrical insulation properties are strong, saving floor space
Advantage and got more and more applications in the engineering field such as transformer station and big power station.
Due at present not for country, the international standard of insulating tube type busbar, in addition its operating experience at home
It is fewer with experience accumulation, cause insulating tube type busbar production, install and running in, there is such as internal gas unavoidably
Gap defect, moisture penetrate into the typical defect of defect and material technology defect etc..When what is produced by high current in actual motion
Electric heating is acted on when on insulating tube type busbar simultaneously, will accelerate the further development of these defects, ultimately results in insulating tube type
Bus is destroyed and triggers failure, and serious potential safety hazard is brought to transformer station and large-scale generation engineering etc..Therefore, examination application
In the ability of the resistance to thermal-electrical aging of the insulating tube type busbar of the engineering field such as transformer station and big power station, with very important
Realistic meaning and engineering application value.
To examine the resistant to deterioration ability of the insulation system under electric stress and thermal stress double action, it is necessary to enter to insulation system
Row electric heating ageing testing.Traditional electric heating ageing testing is carried out can introduce in the baking oven of high-voltage line, but due to using large-scale
Baking oven carries out electric heating ageing testing and has that dry run environment is untrue, experimentation cost is high, the low shortcoming of aging reliability, thus
Large-scale baking oven is not appropriate for as the electrical-heating aging test device for insulating tube type busbar.At present also it is not yet found that for exhausted
The electrical-heating aging test device of edge tube type bus is present, and the application with insulating tube type busbar in each field of every profession and trade gradually increases
Many, the examination that ageing-resistant ability is carried out under electric stress and thermal stress double action to it is most important, accordingly, it would be desirable to develop pin
To the electrical-heating aging test device of insulating tube type busbar.
The content of the invention
It is an object of the invention to provide a kind of experiment dress that electric heating accelerated ageing can be carried out to insulating tube type busbar insulation
Put, and using the test method of the unit simulation insulating tube type busbar actual motion state.
In order to reach object above, the present invention is adopted the following technical scheme that and is achieved：
A kind of insulating tube type busbar electric heating accelerated aging tester, including support section, pressurized part and temperature control portion
Point, the support section fixes many insulating tube type busbars to place simultaneously；The pressurized part includes pressure regulator, high voltage variable
Depressor, extraction grading shield and high-pressure side grading shield, pressure regulator and step-up transformer are used to provide high voltage to sample, by regulation
Pressure regulator T can provide the voltage for meeting test requirements document, draw grading shield and high-pressure side grading shield sets up insulating tube type busbar two ends separately,
High-pressure side grading shield connects the high pressure exit of step-up transformer by the wiring hole of its center recess；The temperature-controlled portion bag
Carbon fiber-quartz electric heating tube, fibre optic temperature sensor, control cabinet, computer are included, is fixed in insulating tube type busbar inside
Heart position, fibre optic temperature sensor fits in insulating tube type busbar inwall, the Transmission Fibers that are connected with fibre optic temperature sensor and
The power line being connected with carbon fiber-quartz electric heating tube is connected with control cabinet, and control cabinet is used for the temperature for detecting fibre optic temperature sensor
Degree display in real time, and according to the working condition of the default temperature adjustment carbon fiber-quartz electric heating tube of computer meeting test temperature
It is required that.
Further, one end insertion insulating tube type busbar cast conductor of grading shield and high-pressure side grading shield is drawn,
It is buckled in outside the other end on the cast conductor of insulating tube type busbar end.
Further, the temperature-controlled portion also includes drawing earthenware, support earthenware, and carbon fiber-quartz electric heating tube passes through
Draw earthenware and support earthenware is fixed on insulating tube type busbar cast conductor, draw earthenware and support earthenware point
Extraction grading shield and high-pressure side grading shield are not installed on.
Further, the power line of carbon fiber-quartz electric heating tube is connected to control cabinet correspondence light by drawing earthenware extraction
In fine output channel, drawing on ceramic tube wall has a strip hole to be used to draw the Transmission Fibers of fibre optic temperature sensor, institute
State Transmission Fibers and be connected on control cabinet sensor passage by drawing earthenware extraction.
Further, the one end for drawing earthenware and the fixed carbon fiber-quartz electric heating tube of support earthenware installation has one
The ceramics bracket coordinated with insulating tube type busbar cast conductor inwall.
Further, the support section includes base, is mounted opposite in two risers on base, and two risers of phase are used
Connecting rod is connected, and horizontal bracket strip is symmetrically installed with two risers, is equipped with bracket strip and is cooperated to clamp insulation tube
The regular jaw and moving jaw of type bus.
Further, control cabinet include single-chip microcomputer, power module, A/D modular converters, multichannel modulatedemodulate mode transfer device, after
Electric switch and communication module, carbon fiber-quartz electric heating tube are connected by relay switch with external power source, relay switch
Control end is connected with single-chip microcomputer, and computer is by Single-chip Controlling relay switch state in control cabinet and then controls carbon fiber stone
The input of the working condition of English electrothermal tube, the Transmission Fibers being connected with fibre optic temperature sensor and multichannel modulatedemodulate mode transfer device
Connection, the output end of multichannel modulatedemodulate mode transfer device is connected by A/D modular converters with single-chip microcomputer, and single-chip microcomputer passes through communication module
It is connected with computer, for design temperature, display and record temperature.
Further, draw grading shield and high-pressure side grading shield insertion end is radially provided with multiple otch, when extraction grading shield
Otch understands elastic shrinkage to ensure it with cast conductor when inserting insulating tube type busbar cast conductor with high-pressure side grading shield
Internal good contact.
Further, fibre optic temperature sensor one side and the laminating of insulating tube type busbar cast conductor inwall, another side covering
One floor height Wen Mianhou copper foil tapes are attached on the copper conductor inwall of insulating tube type busbar.
A kind of insulating tube type busbar electric heating accelerated aging test method, is realized, methods described bag using above-mentioned experimental rig
Include following steps：
Step one, many insulating tube type busbar ends are pre-processed before the test, make end copper conductor, internal shield, master
Insulating barrier, external shielding layer, ground shield and oversheath are stepped from inside to outside, the external shielding layer at insulating tube type busbar two ends
Peel a part off, expose no less than 100mm insulation, to prevent from being connect with ground shield at cast conductor high pressure in pressure process
It is located in appearance and climbs sudden strain of a muscle along face；
Step 2, pretreated insulating tube type busbar is placed on experimental rig bracket goes forward, by external shielding layer and biography
Lose it is fine lead copper adhesive tape and be attached on the copper conductor inwall of insulating tube type busbar by double, and by carbon fiber-quartz electric heating tube by branch
Support earthenware, extraction earthenware, ceramics bracket, extraction grading shield, high-pressure side grading shield are fixed in insulating tube type busbar
Portion center, difference is drawn after finishing by the power line of Transmission Fibers and carbon fiber-quartz electric heating tube from earthenware is drawn again
It is connected on the corresponding passage of control cabinet；
The position of the moving jaw in step 3, preliminary regulation bracket strip, and respectively by many insulating tube type busbar samples
It is placed on bracket between regular jaw and moving jaw, and slides moving jaw and fixes to clamp insulating tube type busbar；
Step 4, adjustable ac high-voltage source is made up of pressure regulator, step-up transformer, protective resistance and coupled capacitor, and
The high pressure exit of step-up transformer is connected on insulating tube type busbar, sets different according to insulating tube type busbar size of sample
Access voltage class, and by ground wire respectively from the ground shield step of insulating tube type busbar end draw earth；；
Step 5, control cabinet is connected by communication module with computer, to design temperature, display and record temperature,
And complete corresponding control work；
Step 6, control cabinet are passed through by contrasting the data of optical fiber temperature sensor feedback on insulating tube type busbar inwall
Carbon fiber-quartz electric heating tube working condition in each insulating tube type busbar of relay switch combine regulation, to ensure each insulating tube type
Bus inner wall temperature is requiring to be fluctuated in temperature range no more than 1 DEG C.
The advantage of insulating tube type busbar electrical-heating aging test device proposed by the present invention and method is：
1st, employ mode of heating in carbon fiber-quartz electric heating tube, one be can more realistically analog insulation tube type bus fortune
Row environment, experimental result has more researching value；Two is to stablize with quick heating, small thermal inertia, high temperature resistant, electric property, use
The characteristics of long lifespan, electric conversion efficiency high, at least can be with energy-conservation 30% than general heating element heater；
2nd, electric heating accelerated aging test can be carried out to many insulating tube type busbars of different size simultaneously, various electricity can be met
The requirement of thermal acceleration degradation scheme, additionally, the electric heating accelerated aging tester structure design compact and reasonable, space utilization
Rate is high, and floor space is small, with stronger practicality and applicability；
3rd, using fibre optic temperature sensor, it is based on optical signal transmission information, is done with good electrical insulating property, anti-electromagnetism
Disturb, the advantageous characteristic such as high voltage withstanding, the influence that high voltage can be avoided to carry out fever strip improves the precision of temperature control；Have simultaneously
Security higher；
Brief description of the drawings
Fig. 1 is that the stereochemical structure of the one of embodiment of insulating tube type busbar electric heating accelerated aging tester of the present invention is shown
It is intended to；
Fig. 2 is the decomposition texture schematic diagram of experimental rig in Fig. 1；
Fig. 3 is the fundamental diagram of insulating tube type busbar electric heating accelerated aging tester of the present invention；
Fig. 4 is the longitudinal section view of insulating tube type busbar sample；
Fig. 5 (a) is the structure chart for having completed the insulating tube type busbar that related auxiliary accessory is installed；Fig. 5 (b) is axial section
Figure；
Fig. 6 is the structure decomposition figure of Fig. 5 (b)；
Fig. 7 is the structure principle chart of control cabinet in experimental rig of the present invention；
Fig. 8 is the use state figure of experimental rig of the present invention.
In Fig. 1~Fig. 8：1-bracket strip；2-moving jaw；3-regular jaw；4-riser；5-riser mounting seat；
6-base plate；7-connecting rod；8-base；9-leg；10-control cabinet；11-screw；12-insulating tube type busbar；13-draw
Go out grading shield；14-high-pressure side grading shield；15-carbon fiber-quartz electric heating tube；16-draw earthenware；17-support earthenware；
18-ceramics bracket；19-high temperature cotton；20-copper foil tape；21-fibre optic temperature sensor；22-computer；121-copper is led
Body, 122-internal shield, 123-main insulating layer, 124-external shielding layer, 125-ground shield, 126-oversheath；AT—
Pressure regulator；T-step-up transformer；R-protective resistance；C-coupled capacitor.
Specific embodiment
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is clearly and completely described.
With reference to Fig. 1~7, the present invention provides a kind of insulating tube type busbar electric heating accelerated aging tester, including supporting part
Point, pressurized part and temperature-controlled portion.
Support section includes bracket strip 1, moving jaw 2, regular jaw 3, riser 4, riser mounting seat 5, base plate 6, connection
Bar 7, base 8, leg 9, screw 1.
The bottom surface difference screw thread of base 8 installs four legs 9, can be by adjusting the height leveling base 8 of leg 9, the He of base 8
Two base plates 6, riser mounting seats 5 are linked together with screw 11, and riser 4 is arranged in riser mounting seat 5, and relative two stand
Linked together with connecting rod 7 between plate 4.Symmetrical (i.e. in sustained height) is provided with horizontal bracket strip 1 on two risers 4,
The number and spacing that each 4 bracket bar of riser 1 is installed are designed according to actual needs.
Regular jaw 3 and moving jaw 2 are housed, the space between regular jaw 3 and moving jaw 2 is used in bracket strip 1
Insulating tube type busbar 12 is placed, can be by adjusting the spacing between moving jaw 2 and regular jaw 3 to meet placement various outer diameter
The requirement of insulating tube type busbar 12.
With reference to Fig. 3-5, pressurized part is used to give sample high voltage, including pressure regulator AT, high-tension transformer T, extraction are
Pressure cover 13, high-pressure side grading shield 14, draw earthenware 16 and support earthenware 17, pressure regulator AT and step-up transformer T be used to
Sample provides high voltage, by adjusting pressure regulator AT can offer meet the voltage of test requirements document.
Draw grading shield 13 and high-pressure side grading shield 14 is aluminium and is made, set up the two ends of insulating tube type busbar 12 separately, draw
One end insertion cast conductor of insulating tube type busbar 12 of grading shield 13 or high-pressure side grading shield 14, is buckled in insulation outside the other end
On the end cast conductor of tube type bus 12, nose end is equal drawing than the cast big 1mm of conductor internal diameter of insulating tube type busbar 12 in insertion
Pressure cover 13 and the insertion end of high-pressure side grading shield 14 are radially provided with 6 otch, when extraction grading shield 13 and high-pressure side grading shield 14 are inserted
Otch understands elastic shrinkage to ensure it with cast conductor good contact when entering insulating tube type busbar cast conductor.High pressure
It is provided with wiring hole to connect step-up transformer T high pressure exits at the central concave of grading shield 14 of end, 8 insulating tube type busbars 12
High-pressure side grading shield 14 is simultaneously connected on step-up transformer T high pressure exits, and 8 ground shields of insulating tube type busbar 12 are simultaneously
Connection ground.
With reference to Fig. 5 (a), Fig. 5 (b), Fig. 6 and Fig. 7, temperature-controlled portion is to display in real time, record and regulation cast conductor temperature
Degree, including carbon fiber-quartz electric heating tube 15, fibre optic temperature sensor 21 (such as single-point type fluorescent type fibre optic temperature sensor), draw
Go out earthenware 16, support earthenware 17, ceramics bracket 18, control cabinet 10, computer 22.Wherein, carbon fiber-quartz electric heating tube 15
The cast conductor of insulating tube type busbar 12, carbon fiber quartz electric heating are fixed on by drawing earthenware 16 and support earthenware 17
The power line of pipe 15 is connected in the output channel of the correspondence optical fiber of control cabinet 10 by drawing the extraction of earthenware 16, and control cabinet 10 is total to
There are 8 passages to be connected with 8 carbon fiber-quartz electric heating tubes 15 respectively, within mode of heating by needed for cast conductor heat run
Temperature.Draw earthenware 16 to be inserted into the extraction interstitial hole of grading shield 13, drawing on the tube wall of earthenware 16 has a strip hole to be used to
Draw the Transmission Fibers of fibre optic temperature sensor 21；Transmission Fibers are connected on the sensor passage of control cabinet 10 after drawing；Branch
Support earthenware 17 one end is used to support carbon fiber-quartz electric heating tube 15, and the other end is on high-pressure side grading shield 14.
Draw earthenware 16 and support earthenware 17 install fixed carbon fiber-quartz electric heating tube 15 one end have one and
The ceramics bracket 18 that the cast conductor inwall of insulating tube type busbar 12 coordinates；Control cabinet 10 includes that single-chip microcomputer, power module, A/D turn
Mold changing block, multichannel modulatedemodulate mode transfer device, relay switch and communication module, carbon fiber-quartz electric heating tube 15 are opened by relay
Pass is connected with external power source, and the control end of relay switch is connected with single-chip microcomputer, and computer 22 is by single-chip microcomputer in control cabinet 10
The working condition of control relay on off state and then control carbon fiber-quartz electric heating tube 15, is connected with fibre optic temperature sensor 21
Transmission Fibers be connected with the input of multichannel modulatedemodulate mode transfer device, the output end of multichannel modulatedemodulate mode transfer device passes through A/D
Modular converter is connected with single-chip microcomputer, and single-chip microcomputer is connected by communication module with computer 22, for design temperature, display and record
Temperature.
With reference to Fig. 4, the one side of fibre optic temperature sensor 21 and the cast conductor inwall of insulating tube type busbar 12 are fitted, and another side covers
It is attached on the inwall of copper conductor 121 of insulating tube type busbar 12 with the copper foil tape 20 of 180 DEG C of heatproof after the floor height temperature cotton 19 of lid one.
The surrounding of fibre optic temperature sensor 12 covers a floor height Wen Mianke prevents infrared heat from directly heating fibre optic temperature sensor 21, makes light
21 temperature of the inwall of copper conductor 121 of measurement insulating tube type busbar 12 of fine temperature sensor, outside copper-surfaced paper tinsel can prevent infrared
Through influence to fibre-optical probe fluorescence, fibre optic temperature sensor 21 is by being attached to the copper conductor 121 of insulating tube type busbar 12 for light
Transmission Fibers on inwall are connected with the passage on control cabinet 10.The sample of insulating tube type busbar 12 is successively from inside to outside copper conductor
121st, internal shield 122, main insulating layer 123, external shielding layer 124, ground shield 125 and oversheath 125.
With reference to Fig. 7, the course of work of control cabinet 10 is：Monolithic is write by communication module after design temperature on computer 22
Machine, multichannel modulatedemodulate mode transfer device send excitation light it is incoming through optical fiber, the Fibre Optical Sensor cephalic par of fibre optic temperature sensor 21 is received
Excitation light is excited and launches fluorescence, and fluorescence signal is derived by optical fiber, and enters multichannel modulatedemodulate mode transfer by fiber coupler
Device, is processed by amplified in multichannel modulatedemodulate mode transfer device by fluorescence signal processing system, and calculating fluorescence lifetime is simultaneously defeated
Go out the voltage signal of 0-5V, voltage signal is converted to data signal and sends into the register of single-chip microcomputer by A/D modular converters, it is single
Piece machine reads 8 data signals of register and is compared to control relay with the temperature of setting in order within the work period
Device is switched, while the temperature signal that will be read is shown via the incoming computer 22 of communication module.
With reference to Fig. 8, electric heating accelerated aging tester is only as an experiment of electric heating accelerated aging test as shown in Figure 1
Platform, the unit can carry out electric heating accelerated aging test to 8 insulating tube type busbars 12 simultaneously, the sample of insulating tube type busbar 12
Between 1m to 2m scopes, external diameter is not limited length, and various outer diameter insulation tube can be met by adjusting moving jaw
The fixation of type bus 12；If insulating tube type busbar specimen length is more than 2m, can be by 2 and this electric heating accelerated ageing examination of the above
Experiment device is used in combination, but now needs to change the specification of carbon fiber-quartz electric heating tube.
The present invention also provides a kind of method that electric heating ageing testing is carried out to insulating tube type busbar using above-mentioned experimental rig,
Comprise the steps：
(1) 8 ends of insulating tube type busbar 12 are pre-processed before the test, make end copper conductor 121, internal shield 122,
Main insulating layer 123, external shielding layer 124, ground shield 125 and oversheath 126 are stepped from inside to outside, to take 12KV
Used as test sample, and intercepted length 1.5m, two ends separate mono- section of copper conductor of 150mm to 4000A insulating tube type busbars respectively, especially
Its external shielding layer 124 for ensureing the two ends of insulating tube type busbar 12 peels a part off, exposes no less than 100mm insulation, to prevent
Occur climbing sudden strain of a muscle along face with the ground connection of ground shield 125 at cast conductor high pressure in pressure process；
(2) pretreated insulating tube type busbar 12 is placed on into experimental rig bracket strip 1 to go forward, by optical fiber sensing
Device 21 and Transmission Fibers are led copper adhesive tape and are attached on the inwall of copper conductor 121 of insulating tube type busbar 12 by double, and by carbon fiber stone
English electrothermal tube 15 is by supporting earthenware 17, drawing earthenware 16, ceramics bracket 18, extraction grading shield 13, high-pressure side grading shield
14 are fixed on the cast conductor center of insulating tube type busbar 12, again by Transmission Fibers and carbon fiber quartz after finishing
The power line of electrothermal tube 15 is drawn from earthenware 16 is drawn and is coupled with the corresponding passage of control cabinet 10；Additionally, carbon fiber
Quartz electrothermal tube 15 uses outer through being ￠ 15mm, length 1000mm, power 3000KW, the carbon of 500 DEG C of electric heating tube wall maximum temperature
Fiber quartz electrothermal tube, -250 DEG C of the temperature range -40 DEG C of use of fibre optic temperature sensor 21,0.1 DEG C of sample frequency 20HZ of precision,
The single-point type fluorescent type fibre optic temperature sensor of probe diameter 1mm, output voltage 0-5V.
(3) position of the moving jaw 2 in preliminary regulation bracket strip 1, and respectively put 8 samples of insulating tube type busbar 12
Put on bracket between regular jaw 3 and moving jaw 2, and slide moving jaw 2 and fix to clamp insulating tube type busbar 12, and will
Control cabinet 10 is placed on the base plate 6 of experimental rig support section；
(4) adjustable ac high-voltage source is constituted by pressure regulator AT, step-up transformer T, protective resistance R and coupled capacitor C, and
The high pressure exit of step-up transformer T is connected on insulating tube type busbar 12, will 8 high-pressure sides of insulating tube type busbar 12 it is equal
Wiring hole is connected in high pressure exit in parallel at pressure 14 central concaves of cover, sets different according to the size of sample of insulating tube type busbar 12
Access voltage class, and by ground wire respectively from 8 steps of 12 end ground shield of insulating tube type busbar 125 draw simultaneously
Connection ground；
(5) control cabinet 10 is connected by communication module (such as RS485 communication modules) with computer 22, is used to set temperature
Degree, display and record temperature, and complete corresponding control work；
(6) control cabinet 10 is anti-by fibre optic temperature sensor 21 on the inwall of copper conductor 121 for contrasting insulating tube type busbar 12
The data of feedback, by the work shape of carbon fiber-quartz electric heating tube 15 in each insulating tube type busbar 12 of relay switch combine regulation
State, to ensure that the cast conductor inner wall temperature of each insulating tube type busbar 12 is requiring to be fluctuated in temperature range no more than 1 DEG C
" constant temperature mode " of the sample cast conductor inwall of insulating tube type busbar 12 is completed by control cabinet 10, can both be realized
With the cast conductor inner wall temperature of a collection of insulating tube type busbar 12 it is constant in identical temperature (for example：120 DEG C, 130 DEG C, 155 DEG C,
One in 180 DEG C of equitemperatures) under, it is also possible to realize distinguishing constant with the cast conductor inner wall temperature of a collection of insulating tube type busbar 12
In different temperature (for example：According to the difference of insulating materials, wall temperature in the cast conductor of many insulating tube type busbars of same batch 12
Degree can be constant in 110 DEG C, 120 DEG C, 130 DEG C, 140 DEG C, 150 DEG C, 160 DEG C, 170 DEG C, 180 DEG C of equitemperatures respectively) under.
Insulating tube type busbar electric heating accelerated aging tester of the present invention goes for length between 1m to 2m scopes
Insulating tube type busbar, when insulating tube type busbar specimen length is more than 2m, can be by 2 and this electric heating accelerated ageing of above examination
Experiment device is used in combination, but now longer as needed carbon fiber-quartz electric heating tube.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any
Belong to those skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (10)
1. a kind of insulating tube type busbar electric heating accelerated aging tester, it is characterised in that：Including support section, pressurized part with
And temperature-controlled portion,
The support section fixes many insulating tube type busbars (12) to place simultaneously；
The pressurized part includes pressure regulator (AT), high-tension transformer (T), draws grading shield (13) and high-pressure side grading shield
(14), pressure regulator (AT) and step-up transformer (T) are used to provide high voltage to sample, and satisfaction can be provided by adjusting pressure regulator T
The voltage of test requirements document, draws grading shield (13) and high-pressure side grading shield (14) sets up insulating tube type busbar (12) two ends, high pressure separately
End grading shield (14) connects the high pressure exit of step-up transformer (T) by the wiring hole of its center recess；
The temperature-controlled portion includes carbon fiber-quartz electric heating tube (15), fibre optic temperature sensor (21), control cabinet (10), computer
(22), carbon fiber-quartz electric heating tube (15) is fixed on insulating tube type busbar (12) inner hub location, optical fiber sensing
Device (21) fits in insulating tube type busbar (12) inwall, the Transmission Fibers being connected with fibre optic temperature sensor (21) and and carbon fiber
The power line of quartz electrothermal tube (15) connection is connected with control cabinet (10), and control cabinet (10) is for by fibre optic temperature sensor (21)
The temperature of detection shows in real time, and according to the work shape of the default temperature adjustment carbon fiber-quartz electric heating tube (15) of computer (22)
State is required with meeting test temperature.
2. insulating tube type busbar electric heating accelerated aging tester as claimed in claim 1, it is characterised in that：Draw grading shield
(13) and high-pressure side grading shield (14) one end insertion insulating tube type busbar (12) cast conductor, insulation is buckled in outside the other end
On the cast conductor of tube type bus (12) end.
3. insulating tube type busbar electric heating accelerated aging tester as claimed in claim 1, it is characterised in that：The temperature control portion
To divide also include and draw earthenware (16), support earthenware (17), carbon fiber-quartz electric heating tube (15) is by drawing earthenware (16)
Insulating tube type busbar (12) cast conductor is fixed on support earthenware (17), earthenware (16) and support earthenware is drawn
(17) extraction grading shield (13) and high-pressure side grading shield (14) are respectively arranged in.
4. insulating tube type busbar electric heating accelerated aging tester as claimed in claim 3, it is characterised in that：Carbon fiber quartz
The power line of electrothermal tube (15) is connected in the output channel of control cabinet (10) correspondence optical fiber by drawing earthenware (16) extraction,
Drawing on earthenware (16) tube wall has a strip hole to be used to draw the Transmission Fibers of fibre optic temperature sensor (21), the transmission light
It is fine to be connected on control cabinet (10) sensor passage by drawing earthenware (16) extraction.
5. insulating tube type busbar electric heating accelerated aging tester as claimed in claim 3, it is characterised in that：Draw earthenware
(16) one end of fixed carbon fiber-quartz electric heating tube (15) is installed and has one and insulating tube type busbar with support earthenware (17)
(12) ceramics bracket (18) that cast conductor inwall coordinates.
6. insulating tube type busbar electric heating accelerated aging tester as claimed in claim 1, it is characterised in that：The supporting part
It is divided to including base (8), is mounted opposite in two risers (4) on base (8), two risers (4) of phase is connected with connecting rod (7),
Horizontal bracket strip (1) is symmetrically installed with two risers (7), is equipped with bracket strip (1) and is cooperated to clamp insulating tube type
The regular jaw (3) and moving jaw (2) of bus (12).
7. insulating tube type busbar electric heating accelerated aging tester as claimed in claim 1, it is characterised in that：Control cabinet (10)
Including single-chip microcomputer, power module, A/D modular converters, multichannel modulatedemodulate mode transfer device, relay switch and communication module, carbon is fine
Dimension quartz electrothermal tube (15) is connected by relay switch with external power source, and the control end of relay switch is connected with single-chip microcomputer,
Computer (22) is by Single-chip Controlling relay switch state in control cabinet (10) and then controls carbon fiber-quartz electric heating tube
(15) input of working condition, the Transmission Fibers being connected with fibre optic temperature sensor (21) and multichannel modulatedemodulate mode transfer device
Connection, the output end of multichannel modulatedemodulate mode transfer device is connected by A/D modular converters with single-chip microcomputer, and single-chip microcomputer passes through communication module
It is connected with computer (22), for design temperature, display and record temperature.
8. insulating tube type busbar electric heating accelerated aging tester as claimed in claim 1, it is characterised in that：Draw grading shield
(13) and high-pressure side grading shield (14) insertion end is radially provided with multiple otch, when drawing grading shield (13) and high-pressure side grading shield
(14) otch meeting elastic shrinkage is well connect with ensureing it with cast conductor when inserting insulating tube type busbar cast conductor
Touch.
9. insulating tube type busbar electric heating accelerated aging tester as claimed in claim 1, it is characterised in that：Fiber optic temperature is passed
Sensor (21) is simultaneously fitted with insulating tube type busbar (12) cast conductor inwall, and another side uses copper after covering floor height temperature cotton (19)
Foil belt (20) is attached on the copper conductor of insulating tube type busbar (12) (121) inwall.
10. a kind of insulating tube type busbar electric heating accelerated aging test method, it is characterised in that：Using any in claim 1-8
The item experimental rig is realized, the described method comprises the following steps：
Step one, many insulating tube type busbar (12) ends are pre-processed before the test, make end copper conductor (121), inner shield
Layer (122), main insulating layer (123), external shielding layer (124), ground shield (125) and oversheath (126) are in from inside to outside rank
Scalariform, the external shielding layer (124) at insulating tube type busbar (12) two ends peels a part off, exposes no less than 100mm insulation, to prevent
Occur climbing sudden strain of a muscle along face at cast conductor high pressure in pressure process and at the ground connection of ground shield 125；
Step 2, pretreated insulating tube type busbar (12) is placed on experimental rig bracket goes forward, by external shielding layer (124)
And Transmission Fibers are led copper adhesive tape and are attached on the copper conductor of insulating tube type busbar (12) (121) inwall by double, and by carbon fiber stone
English electrothermal tube (15) is by supporting earthenware (17), drawing earthenware (16), ceramics bracket (18), extraction grading shield (13), height
Pressure side grading shield (1) is fixed on insulating tube type busbar (12) inner hub location, again that Transmission Fibers and carbon are fine after finishing
The power line of dimension quartz electrothermal tube (15) is drawn from earthenware (16) is drawn and is coupled with the corresponding passage of control cabinet (10)；
The position of the moving jaw (2) in step 3, tentatively regulation bracket strip (1), and respectively by many insulating tube type busbars examinations
Sample is placed on bracket (1) between regular jaw (3) and moving jaw (2), and is slided moving jaw (2) and fixed to clamp insulation tube
Type bus (12)；
Step 4, adjustable exchange is constituted with coupled capacitor (C) by pressure regulator (AT), step-up transformer (T), protective resistance (R)
High-voltage power supply, and the high pressure exit of step-up transformer (T) is connected on insulating tube type busbar (12), according to insulating tube type busbar
(12) size of sample sets different access voltage class, and by ground wire respectively from insulating tube type busbar (12) end earthing
Cover extraction earth at layer (125) step；；
Step 5, control cabinet (10) is connected by communication module with computer (22), to design temperature, display and record temperature
Degree, and complete corresponding control work；
Step 6, control cabinet (10) are by contrasting the number that fibre optic temperature sensor (21) feeds back on insulating tube type busbar (12) inwall
According to, by carbon fiber-quartz electric heating tube (15) working condition in each insulating tube type busbar of relay switch combine regulation (12),
To ensure that each insulating tube type busbar (12) inner wall temperature is requiring to be fluctuated in temperature range no more than 1 DEG C.
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