CN104655897B - A kind of heat loss through convection divider - Google Patents
A kind of heat loss through convection divider Download PDFInfo
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- CN104655897B CN104655897B CN201510080146.6A CN201510080146A CN104655897B CN 104655897 B CN104655897 B CN 104655897B CN 201510080146 A CN201510080146 A CN 201510080146A CN 104655897 B CN104655897 B CN 104655897B
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- convection
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Abstract
The present invention relates to a kind of heat loss through convection divider, including insulating cylinder, hollow insulation convection current support tube is installed in the insulating cylinder, it is convection channel inside insulation convection current support tube, the top of the insulating cylinder is connected with grading ring by flange, the insulating cylinder bottom is arranged on base by flange, the flange is coaxially disposed with insulation convection current support tube, and the flange offers between flange and grading ring at the top of the flange convection holes communicated with convection channel, the insulating cylinder and is respectively formed with cross-ventilation gap between the flange and base of insulating cylinder bottom.The present invention is provided with hollow insulation convection current support tube in insulating cylinder, it is convection channel inside the insulation convection current support tube, the flange at insulating cylinder two ends opens up the flange convection holes communicated with convection channel, so, the joule that divider is produced is thermally conducted to after insulation convection current support tube, taken away by convection channel and the circulation of flange convection holes, reach the purpose of radiating.
Description
【Technical field】
The present invention relates to a kind of divider, particularly a kind of heat loss through convection divider.
【Background technology】
High pressure, high accuracy, heat loss through convection divider are high voltage ac/dc voltage measurement basic devices, are AC-HVDC systems
Key device in system and high-accuracy sampling device.Typical case's application is high pressure, extra-high voltage alternating current-direct current voltage precision partial pressure measurement neck
Domain.China's high pressure, extra-high voltage alternating current-direct current power transmission and transformation system require that voltage measurement degree is generally 0.2 grade, and the electricity in laboratory
Press (0.1-0.01 grades) of accuracy of measurement higher.So far China's alterating and direct current pressure measuring device is installation in " totally-enclosed cavity "
SF is filled after resistor and capacitor6(or filling other materials) structure type, ± 800kV and ± 1100kV that such as my company develops
The direct current electronic voltage transformer high-accuracy noninductive resistance unit of high pressure, is exactly using traditional " totally-enclosed cavity ", work
Electric current 2mA.When applying rated power energization 1.5h, 0.5h is powered off, when continuing for 24 cycle, when applying rated power energization 1.5h
Temperature difference △ t=70 DEG C inside and outside " totally-enclosed cavity ", and environment temperature is high-end 50 DEG C, final " totally-enclosed cavity " temperature can rise
To 120 DEG C or so, 90 DEG C of the electric capacity ceiling temperature used is far higher by.For solve this problem mentality of designing be concentrated mainly on resistance,
In terms of electric capacity, insulating materials heat endurance, electric-field intensity distribution.
Comprehensive many-side influence factor, using Rational structure, can improve combined-voltage measurement accuracy, reduce time, ring
Influence of the border temperature effect to whole system；Using Rational structure systematic survey Primary Component hot(test)-spot temperature will not be surpassed simultaneously
Cross the running temperature (90 DEG C) of capacitance resistance ware permission, it is ensured that system is run reliably and with long-term, it is to avoid because above-mentioned reason causes part to be closed
The performance reduction of key device, insulating materials, the accident that the system external insulation of even resulting in punctures and triggered.
【The content of the invention】
It is an object of the invention to provide a kind of heat loss through convection divider, it is adaptable to the accurate survey of high voltage ac/dc voltage
Amount, partial pressure sampling, improve reliability and the degree of accuracy of sampling system.
To achieve the above objectives, the present invention adopts the following technical scheme that what is be achieved.
Hollow insulation convection current support tube, institute are installed in a kind of heat loss through convection divider, including insulating cylinder, the insulating cylinder
It is convection current to state inside the insulating materials of the space filled solid between insulating cylinder and insulation convection current support tube, insulation convection current support tube
Passage, the top of the insulating cylinder is connected with grading ring by flange, and the insulating cylinder bottom is arranged on base by flange,
The flange is coaxially disposed with insulation convection current support tube, and the flange offers the flange convection holes communicated with convection channel,
Air is respectively formed between flange and grading ring at the top of the insulating cylinder and between the flange and base of insulating cylinder bottom
To ebb interval.
The flange convection holes are symmetrical arranged with flange center's line.
The cross-ventilation gap is suitable with insulating cylinder external diameter in the size of insulating cylinder radial direction.
The insulating cylinder is that more piece insulating cylinder is in series, wherein, what bottommost was connected with base one saves insulating cylinder and interior
Portion's part constitutes the low pressure arm unit of divider, and other insulating cylinders and internal part constitute high pressure arm unit.
Connected between the adjacent insulating cylinder by flange, all flanges include inner flange and outward flange, wherein, own
Interior outward flange is that metal material is made, and is connected between interior outward flange by insulating isolation ring.
Flange center position at the top of the insulating cylinder at secondary top is mounted on internode connector, and the internode connector is adopted
It is made of metallic resilient material.
Pinch Resistor is installed between the insulating cylinder and insulation convection current support tube, the two ends difference of the Pinch Resistor
It is connected with outward flange.
Insulating cylinder and the annular space of insulation convection current support tube formation are divided into interior space and outer by the Pinch Resistor
Space, wherein, it is the external space between Pinch Resistor and insulating cylinder, is interior sky between Pinch Resistor and insulation convection current support tube
Between；The external space is in axial direction provided with insulation support body and equalizing capacitor.
The inwall of the insulation convection current support tube is provided with detent projection tooth, to increase area of dissipation and creep age distance.
Compared with prior art, beneficial effects of the present invention：The present invention is provided with hollow insulation convection current in insulating cylinder
It is convection channel inside support tube, the insulation convection current support tube, the inner flange at insulating cylinder two ends opens up what is communicated with convection channel
Flange convection holes, so, the joule that divider is produced are thermally conducted to after insulation convection current support tube, pass through convection channel and interior method
Blue convection holes circulation is taken away, and reaches the purpose of heat loss through convection.
【Brief description of the drawings】
Fig. 1 is the structural representation of heat loss through convection divider of the present invention.
Fig. 2 is the mplifying structure schematic diagram of Fig. 1 centre circle part As.
Fig. 3 is the structural representation of Fig. 1 centre circles B internode connector.
Fig. 4 is the mplifying structure schematic diagram of Fig. 1 centre circle C portions.
In figure：1--- grading rings；2--- cross-ventilations gap；3--- high-pressure side terminals；4--- inner flanges；The outer methods of 5---
It is blue；6--- equalizing capacitors；7--- insulation convection current support tubes；8--- voltage grading resistors；9--- convection channels；10--- inner flanges
Convection holes；11--- Pinch Resistors；12--- insulating cylinders；13--- full skirts；14--- fixing bolts；15--- insulating isolation rings；
16--- low pressure arm units；17--- connect base metal flanges；18--- bases；19--- partial pressures end leading-out terminal；20--- is grounded
Terminal；21--- internode connectors；22--- insulation support bodies；Space in 23---；The 24--- external spaces.
【Embodiment】
Divider of the present invention is elaborated below according to accompanying drawing.
Fig. 1 is the structural representation of divider of the present invention.Circle represents the part to be amplified in figure.Fig. 2 is Fig. 1 centre circles A
Partial mplifying structure schematic diagram.Shown in figure 3 mounting screws by inner flange and outward flange simultaneously with grading ring (metal material
Material) connection, realize high-pressure side resistor assembly and isolate connecting for support component.Fig. 3 is the structural representation of Fig. 1 centre circle part Bs
Figure.Fig. 4 is the mplifying structure schematic diagram of Fig. 1 centre circle C portions, mainly shows low pressure arm unit, partial pressure end leading-out terminal and low
Pressure side resistor assembly the structure such as connects with isolation support component.
Refer to shown in Fig. 1 to Fig. 4, divider of the present invention includes grading ring 1, high pressure arm unit, low pressure arm unit, and
Base 18.The high pressure arm unit is several, and the low pressure arm unit is one.The high pressure arm unit passes through high-pressure side end
Son 3 is drawn, and the low pressure arm unit output is drawn by partial pressure end leading-out terminal 19.
The high pressure arm unit and low-voltage arm include insulating cylinder 12, the high-voltage arm of the high-pressure side positioned at top
The top of insulating cylinder 12 is provided with the grading ring 1, and the low-voltage arm insulating cylinder 12 is arranged on base 18.
The insulating cylinder 12 of top is connected by metal flange with grading ring 1, and the metal flange includes inner flange 4 and outer
Flange 5, the inner flange 4 and outward flange 5 are separated by insulating isolation ring, and shown outward flange 5 is consolidated by fixing bolt and grading ring 1
Fixed connection；The insulating cylinder 12 of the low-voltage arm is connected by connect base metal flange 17 with base 18, the connect base gold
Belonging to flange 17 includes inner flange 4 and outward flange 5.Inside and outside flange is made up of metal material.
Inner flange positioned at the upper end of each insulating cylinder 12 at secondary top is provided with internode connector 21, and the internode connector 21 is used
Metallic resilient material is made, so, when the insulating cylinder 12 of top is arranged on next section insulating cylinder 12, the internode connector
21 are depressed so as to the connection of resistor assembly above and below realizing.In addition, being made between each inner flange and outward flange by bakelite
Insulating isolation ring 15 be spaced；Position of the outward flange 5 outside insulating cylinder 12 is fixedly connected by fixing bolt 14, real
Now isolate the connection of support component up and down.
Hollow insulation convection current support tube 7 is mounted on inside each section insulating cylinder 12, the inside of insulation convection current support tube 7 is
Convection channel 9, the outer wall of insulation convection current support tube 7 is provided with voltage grading resistor 8, and the voltage grading resistor 8 uses the noninductive precision of high pressure
Resistor, and the deburring after concatenation；The performance of high pressure is noninductive precision resistor directly determines the performance of divider.In described
Flange 4 is arranged on the top and bottom of insulation convection current support tube 7 and is coaxially disposed with insulation convection current support tube 7, and the inner flange 4 is opened
The inner flange convection holes 10 communicated provided with the convection channel 9 with the convection current support tube 7 that insulate.
The thermal conductivity factor of the insulation convection current support tube 7 is higher than SF6More than ten times of thermal conductivity factor.In addition, the insulation pair
The inwall of stream support tube 7 is provided with detent projection tooth, to increase area of dissipation and creep age distance.
Annular space between the insulation convection current support tube 7 and insulating cylinder 12 is filled with the dielectric of solid, should
Annular space is clamped resistor 11 and is divided into two parts in the axial direction, between the Pinch Resistor 11 and insulating cylinder 12
Space is the external space 24, and the space between Pinch Resistor 11 and insulation convection current support tube 7 is interior space 23, in the external space
In axial direction it is provided with insulation support body 22 and equalizing capacitor 6.The interior space 23 and the external space 24 are separate close
Envelope, the insulating materials of the interior space 23 and the external space 24 filled with solid.
The top of the Pinch Resistor 11 is connected with high-pressure side, and lower end is connected to ground, and is available for the different parts of dismounting
Outward flange is connected with the Pinch Resistor at place position, the clamper current potential of outward flange, makes the current potential and partial pressure of whole outward flange
Device Potential distribution is identical.
The equalizing capacitor selects high-voltage capacitor, and 90 DEG C of highest heatproof plays pressure effect；The Pinch Resistor
Be by voltage grading resistor with the external world realization isolate, for undertake partial pressure " resistor assembly " provide one not by ambient humidity, filth,
" purification " environment of the exposed grade influence of flange.
In patent of the present invention, the insulation convection current support tube 7, voltage grading resistor 8, and inner flange collectively form resistance
Component；The equalizing capacitor 6, Pinch Resistor 11, insulating cylinder 12, the full skirt 13 of drum outer wall of insulating, internode connector 21, absolutely
Edge supporter 22, and outward flange 5 collectively form isolation support component.The joule that the resistor assembly is produced is thermally conducted to insulation
After convection current support tube 7, taken away by convection channel 9 and the circulation of inner flange convection holes 10, reach the purpose of radiating.
Resistor assembly of the present invention is connected to inner flange 4.In several high pressure arm units and a low pressure arm unit
Resistor assembly interconnected by internode connector 21；Isolation support component is connected to outward flange.Several high pressure arm units
Interconnected with the isolation support component in a low pressure arm unit by fixing bolt.Inner flange and outward flange by insulate every
Connected from ring 15, make resistor assembly and the extraneous electric isolution constituted physically.
The high pressure arm unit mainly includes by the resistor assembly bonded together by insulating isolation ring 15 and isolation
Support component, insulating isolation ring 15 ensure that resistor assembly is electric isolution physically with isolating support component.The high-voltage arm
Connection between unit is connected by outward flange 5 with fixing bolt, the isolation support component of the high pressure arm unit after connection
Between be connected with each other by fixing bolt 15, resistor assembly is connected by internode connector 21.
Electric isolution physically of the present invention refers to：In same section high pressure arm unit or whole divider, undertake
The resistor assembly of partial pressure with undertake clamper, isolate, press, connect, support isolation support component be mutually physically electricity every
From, only in the high-pressure side and ground terminal of divider, resistor assembly is connected with isolation support component.
Alternating current-direct current divider of the present invention is that first segment, second section ... n-th are saved into the docking of high pressure arm unit as requested to mix
Grading ring 1, low pressure arm unit, base etc. are constituted.The 1 of the divider saves resistor assembly to n and low pressure arm unit is connected by internode
What fitting 21 was mutually connected to each other；Equally, the 1 of the divider is mutually connected to n sections isolation support component by fixing bolt 14
It is connected together；Only connected in high-pressure side with ground terminal resistor assembly with isolation support component.N saves resistor assembly and low-voltage arm
The resistor assembly of component undertakes voltage divide function；Isolation support component undertakes clamper, isolation, pressure, connection, support function.
In voltage divider arrangement of the present invention, filling is solid in the annular space (interior space 23 and the external space 24) of insulating cylinder
The insulating materials of body and seal against each other so that be not present when dismantling and using and the factor, only convection channel and skirt such as reveal, make moist
Umbrella is communicated with the external world.
Claims (9)
1. a kind of heat loss through convection divider, it is characterised in that：Including insulating cylinder (12), hollow insulation is installed in the insulating cylinder
Convection current support tube (7), insulation convection current support tube (7) outer wall is provided with voltage grading resistor (8), the insulating cylinder and insulation convection current branch
It is convection channel (9) to support inside the insulating materials of the space filled solid between cylinder, insulation convection current support tube, the insulating cylinder
Top is connected with grading ring (1) by flange, and the insulating cylinder bottom is arranged on base (18) by flange, the flange with
Insulation convection current support tube is coaxially disposed, and the flange offers the flange convection holes (10) communicated with convection channel, described exhausted
It is respectively formed between flange and grading ring at the top of edge cylinder and between the flange and base of insulating cylinder bottom between cross-ventilation
Gap (2)；The cross-ventilation gap of bottom passes through the cross-ventilation gap at the top of convection channel (9) connection.
2. a kind of heat loss through convection divider according to claim 1, it is characterised in that：The flange convection holes are with flange
Heart line is symmetrical arranged.
3. a kind of heat loss through convection divider according to claim 1, it is characterised in that：The cross-ventilation gap (2) exists
The size of insulating cylinder radial direction is suitable with insulating cylinder external diameter.
4. a kind of heat loss through convection divider according to claim 1, it is characterised in that：The insulating cylinder is more piece insulating cylinder
It is in series, wherein, a section insulating cylinder and internal part that bottommost is connected with base constitute the low pressure arm unit of divider, its
His insulating cylinder and internal part constitutes high pressure arm unit.
5. a kind of heat loss through convection divider according to claim 4, it is characterised in that：Pass through between the adjacent insulating cylinder
Flange is connected, and all flanges include inner flange and outward flange, wherein, all inside and outside flanges are that metal material is made, interior,
Connected between outward flange by insulating isolation ring (15).
6. a kind of heat loss through convection divider according to claim 5, it is characterised in that：At the top of the insulating cylinder at secondary top
Flange center position be mounted on internode connector (21), the internode connector is made of metallic resilient material.
7. a kind of heat loss through convection divider according to claim 4 or 5, it is characterised in that：The insulating cylinder and insulation pair
Pinch Resistor (11) is installed between stream support tube, the two ends of the Pinch Resistor are connected with flange respectively.
8. a kind of heat loss through convection divider according to claim 7, it is characterised in that：The Pinch Resistor is by insulating cylinder
With insulation convection current support tube formation annular space be divided into interior space (23) and the external space (24), wherein, Pinch Resistor and
It is the external space between insulating cylinder, is interior space between Pinch Resistor and insulation convection current support tube；The external space is square vertically
To being provided with insulation support body (22) and equalizing capacitor (6).
9. a kind of heat loss through convection divider according to claim 1, it is characterised in that：The interior of convection current support tube that insulate
Wall is provided with detent projection tooth, to increase area of dissipation and creep age distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510080146.6A CN104655897B (en) | 2015-02-13 | 2015-02-13 | A kind of heat loss through convection divider |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510080146.6A CN104655897B (en) | 2015-02-13 | 2015-02-13 | A kind of heat loss through convection divider |
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| CN104655897A CN104655897A (en) | 2015-05-27 |
| CN104655897B true CN104655897B (en) | 2017-08-01 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106468729A (en) * | 2015-08-20 | 2017-03-01 | 中国电力科学研究院 | A kind of divider with radiator structure |
| CN105092927B (en) * | 2015-09-11 | 2018-07-03 | 广东电网有限责任公司电力科学研究院 | A kind of self-calibration high-precision alternating current-direct current divider |
| CN105891575A (en) * | 2016-06-14 | 2016-08-24 | 广东电网有限责任公司电力科学研究院 | Voltage divider |
| CN109557354B (en) * | 2018-10-17 | 2023-11-07 | 全球能源互联网研究院有限公司 | Broadband voltage transformer containing resistance-capacitance series-parallel topological unit |
| CN109300676B (en) * | 2018-10-17 | 2022-01-18 | 全球能源互联网研究院有限公司 | Broadband voltage transformer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2537898B2 (en) * | 1987-08-31 | 1996-09-25 | 松下電器産業株式会社 | Voltage divider |
| DE4107944A1 (en) * | 1991-03-13 | 1992-09-17 | Sachsenwerk Ag | Insulation part for ohmic potential divider in HV system - contains plastics material insulating body contg. conducting material and carrying electrodes forming divider and measurement resistors |
| CN101877275B (en) * | 2010-07-16 | 2012-01-18 | 国网电力科学研究院 | Method for improving pollution flicker-resisting capability of DC voltage transformer |
| CN203798883U (en) * | 2014-04-08 | 2014-08-27 | 武汉国测恒通智能仪器有限公司 | Micro-current high-precision resistor type voltage dividing device |
| CN204116436U (en) * | 2014-09-30 | 2015-01-21 | 中国西电电气股份有限公司 | A kind of extra-high voltage direct-current measurement mechanism with two sleeve radiating element |
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Inventor after: Zhao Xiaolong Inventor after: Ke Jiaru Inventor after: Ke Gaochao Inventor after: Feng Jianhua Inventor after: Ren Wenzhu Inventor after: Lin Guoying Inventor after: Pan Feng Inventor after: Zhang Dingqu Inventor after: Lei Peng Inventor before: Zhao Xiaolong Inventor before: Ke Jiaru Inventor before: Ke Gaochao Inventor before: Feng Jianhua Inventor before: Ren Wenzhu Inventor before: Lin Guoying Inventor before: Pan Feng Inventor before: Zhang Dingqu Inventor before: Lei Peng |
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