CN108047655A - A kind of formula and preparation method of dry reactor encapsulating insulation system - Google Patents
A kind of formula and preparation method of dry reactor encapsulating insulation system Download PDFInfo
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- CN108047655A CN108047655A CN201711454677.2A CN201711454677A CN108047655A CN 108047655 A CN108047655 A CN 108047655A CN 201711454677 A CN201711454677 A CN 201711454677A CN 108047655 A CN108047655 A CN 108047655A
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- Prior art keywords
- methylimidazole
- epoxy resin
- ethyl
- insulation system
- dry reactor
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/4007—Curing agents not provided for by the groups C08G59/42 - C08G59/66
- C08G59/4014—Nitrogen containing compounds
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/40—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Epoxy Resins (AREA)
Abstract
The invention discloses a kind of formulas and preparation method of new dry reactor encapsulating insulation system, are formulated as epoxy resin：2 ethyl, 4 methylimidazole=100:2.5 3, it is preheated and be stirred glue is made, then use.It overcomes the problems such as existing reactor encapsulates the big water inlet easy to crack of insulating layer brittleness in operational process outdoors, the class of insulation is low, weatherability is poor.
Description
Technical field
The invention belongs to field of electrical equipment, and in particular to a kind of dry reactor encapsulating insulation system formula and its preparation
Method.
Background technology
Since reform and opening-up, China's power grid construction is rapid, popularization, and substation builds also increasing.With science and technology
Development and social progress, the consciousness of people's conservation of nature is more and more stronger, and oil-free dry air reactor is increasingly becoming reactance
The mainstream of device product is widely used in power transmission and transformation field.
Dry-type air-core reactor have be lost small, low noise, safeguard it is simple, there is no magnetic saturation phenomenon, reactance value is linear
The advantages that having spent, using more and more extensive in power grid.The 35kV of 65%-75% and following capacitor group reactor at present
Use dry-type hollow structure.And dry-type air-core reactor is usually installed outdoors, service condition is more severe, especially in the temperature difference
Greatly, under the strong or rainy environment of ultraviolet light, to weatherability, resistance to cracking, the water proofing property of dry-type air-core reactor encapsulating insulating layer
It is required that higher.
The encapsulating of dry-type air-core reactor is entwined by the glass fiber yarn of epoxy resin-impregnated glue, so asphalt mixtures modified by epoxy resin
The type selecting of fat insulation system formula is most important, and it is mainly epoxy resin and methyl tetrahydro phthalic anhydride to encapsulate insulation system prescription at present
Solidfied material, this encapsulating insulation system cured product brittleness it is big, the class of insulation is low, weatherability is poor, cause dry-type air-core reactor
Thing Frequent Troubles, damage even burnout failure, make a big impact to electric power netting safe running.So dry reactor insulator
System's formula is selected to a problem urgently to be resolved hurrily.
When encapsulating insulation system formula type selecting, the main type for considering curing agent, 2-ethyl-4-methylimidazole (2,4-
EMI) be epoxy resin catalytic curing agent, compared with other curing agent, final product have more excellent mechanical performance,
Dielectric properties and thermal stability.2-ethyl-4-methylimidazole has extremely good intermiscibility, viscosity after mixing with epoxy resin
Greatly, gummosis is not easy, ensure that the gel content of encapsulating insulating layer, epoxy resin and 2-ethyl-4-methylimidazole are according to certain ratio
After example cures, heat distortion temperature can reach 160 DEG C or more, and the class of insulation is F grades, even up to H grades.
The content of the invention
The invention discloses a kind of formulas and preparation method of new dry reactor encapsulating insulation system.Its object is to
Overcome that existing reactor encapsulates the big water inlet easy to crack of insulating layer brittleness in operational process outdoors, the class of insulation is low, weatherability is poor
The problems such as, the present invention encapsulating insulation system formula may insure coil have excellent seal integrity, resistance to expansion and contraction, absolutely
Edge, weatherability, resistance to cracking so as to ensure electric machinery, excellent electric properties, reduce power grid accident risk.
Specific technical solution of the present invention is as follows：
A kind of dry reactor encapsulates insulation system formula composition, in parts by weight for：Epoxy resin：2- ethyl -4- first
Base imidazoles=100:2.5-3.
Preferably, a kind of dry reactor encapsulating insulation system formula composition, in parts by weight for：Epoxy resin：2- second
Base -4-methylimidazole=100:2.75.
A kind of preparation method of dry reactor encapsulating insulation system is：
(1) 100 parts of extracting epoxy resin is preheated to 40 DEG C；2.75 parts of 2-ethyl-4-methylimidazole is preheated to 35 DEG C；
(2) 2-ethyl-4-methylimidazole side is added in epoxy resin, it is stirring while adding；
(3) to get encapsulating insulation glue after adding in completely, 4h is interior to be completed to use.
Further, ± 0.2, the control of 2-ethyl-4-methylimidazole weighing error exists the control of epoxy resin weighing error
±0.01。
Further, 2-ethyl-4-methylimidazole adds in rate no more than 1kg/min.
Further, mixing speed is 50~60r/min.
Further, mixing time is not less than 5min.
The technique effect that the present invention obtains：
(1) present invention encapsulating insulation system formula may insure that coil has excellent seal integrity, resistance to expands with heat and contract with cold
Property, insulating properties, weatherability, resistance to cracking, so as to ensure electric machinery, excellent electric properties, reduce power grid accident risk.
(2) the present invention provides the optimum amounts of 2-ethyl-4-methylimidazole.
Preferably to embody the technique effect that the present invention reaches, experiment is as follows：
Experimental example
Experimental example 1：
After epoxy resin cures with 2-ethyl-4-methylimidazole according to different proportion, test main mechanical, electric property,
Data comparison is as shown in the table：Consider, determine a kind of formula of dry reactor encapsulating insulation system.
The experimental results showed that：With being continuously increased for imidazole content, main several performances are continuously improved, and work as asphalt mixtures modified by epoxy resin
Fat：2-ethyl-4-methylimidazole=100:When 2.75, which can be only achieved F grades, 100：2.75 base
Continue to increase imidazole content on plinth, each performance indicator has small size raising, and effect is not it is obvious that in view of cost problem, ring
Oxygen resin：2-ethyl-4-methylimidazole=100:2.75 the most rationally.
Experimental example 2：
By epoxy resin：2-ethyl-4-methylimidazole=100:2.5、100:2.75、100:3 three ratios are prepared, glue
Glue groove is poured into, glue groove temperature need to be maintained at 40~45 DEG C, and the impregnating speed of glass fiber yarn is no more than 35m/min, and dipping is completed
The coiling of coil can be directly carried out afterwards, and prescription one, prescription two, prescription three-winding is respectively prepared.
The prior art is acid anhydrides formula system, is invented as imidazoles formula system, three prescriptions of the present invention and the prior art into
Row Experimental comparison is as follows：
1st, simple beam impact strength (non-notch)
Test apparatus：Electronic universal tester (100kN, CMT-5105GL)
Test method and specimen size：Meet national standard GB/T 1451-2005,80 × 10 × 4mm；
Result of the test：Acid anhydrides formula system：6.18KJ/m2；Imidazoles formula system：One 12.1KJ/m of prescription2, prescription two
15.9KJ/m2, three 16.2KJ/m of prescription2, it has been respectively increased 95.8%, 157.3%, 162.1%.
2nd, bending strength
Test apparatus：Electronic universal tester (100kN, CMT-5105GL)
Test method and specimen size：Meet national standard GB/T 1449-2005,80 × 15 × 4mm；
Result of the test：Acid anhydrides formula system：79.3MPa；Imidazoles formula system：One 120.3MPa of prescription, prescription two
145.8MPa, three 151.1MPa of prescription, have been respectively increased 51.7%, 83.9%, 90.5%.
3rd, compressive strength
Test apparatus：Electronic universal tester (100kN, CMT-5105GL)
Test method and specimen size：Meet 14 × 25mm of national standard GB/T 1041-2008, Φ；
Result of the test：Acid anhydrides formula system：132MPa；Imidazoles formula system：One 163MPa of prescription, two 181MPa of prescription,
Three 180MPa of prescription, has been respectively increased 23.5%, 37.1%, 36.4%.
4th, shear strength
Test apparatus：Electronic universal tester (100kN, CMT-5105GL)
Test method and specimen size：ASTM D2344 are complied with standard, sample size ratio is thickness：Width：Length=
1：2：6；
Result of the test：Acid anhydrides formula system：41.99MPa；Imidazoles formula system：One 48.73MPa of prescription, prescription two
52.70MPa, three 52.94MPa of prescription, have been respectively increased 16.1%, 25.5%, 26.1%.
5th, glass transition temperature
Test apparatus：Differential calorimetric scan instrument (Mettler-Toledo DSC1)
Test method and specimen size：Meet national standard GB/T 22567-2008, solidfied material crushes, N2Protection, 10 DEG C/
min；
Result of the test：Acid anhydrides formula system：123℃；Imidazoles formula system：One 152 DEG C of prescription, 2 171 DEG C of prescription, prescription
3 174 DEG C, it has been respectively increased 23.6%, 39.1%, 41.5%.
6th, load deformation temperature (Tff1.8)
Test apparatus：Microcomputer control thermal deformation dimension card softening test machine
Test method and specimen size：Meet national standard GB/T 1634.1-2004,80 × 15 × 4mm；
Result of the test：Acid anhydrides formula system：109℃；Imidazoles formula system：One 134 DEG C of prescription, 2 160 DEG C of prescription, prescription
3 155 DEG C, it has been respectively increased 22.9%, 46.8%, 42.2%.
7th, water imbibition
Test apparatus：Balance, baking oven, water bath with thermostatic control, drier
Test method and specimen size：Meet national standard GB/T 1034-2008,60 × 60 × 1mm；
Result of the test：Acid anhydrides formula system：0.23%；Imidazoles formula system：Prescription one 0.19%, prescription 2 0.10%,
Prescription 3 0.11%, reduces 17.4%, 56.5%, 52.2% respectively.
8th, gel time
Test apparatus：Gel time analyzer (GEL TIME METER)
Test method and specimen size：Meet national standard GB/T 12007.7-1989；
Result of the test：
The experimental results showed that：The gel time of prescription one to three is significantly lower than anhydride system, in coiling and cures encapsulating absolutely
During edge layer, in rational processing range, gel time is shorter, and gummosis amount is fewer, and on the one hand save material cost, separately
On the one hand the gel content of design is ensure that, so as to ensure product quality.
9th, gel content
Test apparatus：Luxuriant good fortune resistance furnace (RJM-28-10A)
Test method and specimen size：Meet national standard GB/T 2577-2005, sample mass is 2~5g, size：25×25
×5mm；
Result of the test：
The experimental results showed that：Prescription one to three encapsulates the adhesive liquid quantity loss of insulating layer significantly lower than anhydride system, tests again
Demonstrate,prove at above-mentioned 8th point.
10th, stress crack resistant
Test apparatus：Electric heating constant-temperature blowing drying box (DNG-9146A), dynamic visco-elasticity analyser (TA companies of the U.S.,
Q800DMA)
Test method and specimen size：ISO 22088-5-2006 are complied with standard, sample size ratio is length x width
=50 × 50mm；
Sample is tested on dynamic visco-elasticity analyser, wherein, loading mode is single armed three-point bending, and scan pattern is frequency
Rate scan pattern is started to warm up from 20 DEG C, rises to 100 DEG C with the heating rate of 10 DEG C/min, then constant temperature is to 100 DEG C, with 1Hz
Frequency, 20 μm of amplitude carry out repetition rate scanning, it is bent to record storage modulus and the relation of time by testing time 120min
Line.
Result of the test：Acid anhydrides formula system：14.5min；Imidazoles formula system：One 20.1min of prescription, prescription two
26.7min, three 27.3min of prescription, reduce 38.6%, 84.1%, 88.3% respectively.
11st, linear expansion coefficient (20~90 DEG C)
Test apparatus：PCY-D low-temperature expansion coefficient measuring instruments
Test method and specimen size：Comply with standard GB/T 2572-2005, sample size:R=5mm, h=50mm；
Result of the test：Acid anhydrides formula system：48×10-6K；Imidazoles formula system：Prescription one 35 × 10-6K, prescription 2 29
×10-6K, prescription 3 30 × 10-6K；
Most of dry-type air-core reactor uses aluminium magnet wire as winding, with the glass fiber yarn bag of epoxy resin-impregnated
It wraps up in winding and forms encapsulating insulating layer, in reactor operational process, aluminium magnet wire, which can generate heat, causes expansion, out of service or temperature
It can be shunk again during reduction, this requires encapsulating insulating layer and electromagnetic wire have good matching, that is, the line of the two
Property expansion coefficient similar, so as to avoid causing encapsulating insulating layer cracking due to expansion coefficient difference is big, aluminium magnet wire it is linear swollen
Swollen coefficient is 23.6 × 10-6K, therefore imidazole system is better than anhydride system.
12nd, model machine is dissected
Pass through trial product, model：CKGKL-200/35, encapsulating insulating layer carry out coiling using imidazole system formula,
Encapsulating is dissected after finishing, while comparison discovery is carried out with the insulating layer of anhydride system dissection：Imidazole system is formed exhausted
Edge layer is very fine and close, without hole, it is Nian Jie with electromagnetic wire securely, good integrity, and anhydride system is then on the contrary.
The above content is specific test data and test method further description made for the present invention is combined, no
It can assert that the specific embodiment of the present invention is only limitted to this, for those of ordinary skill in the art to which the present invention belongs,
Without departing from the inventive concept of the premise, several simple deduction or replace can also be made, should all be considered as belonging to this hair
Bright claims by being submitted determine scope of patent protection.
Specific embodiment
Embodiment 1
100 parts of extracting epoxy resin is preheated to 40 DEG C；2.75 parts of 2-ethyl-4-methylimidazole is preheated to 35 DEG C, epoxy resin
Weighing error control is ± 0.2, and 2-ethyl-4-methylimidazole weighing error is controlled ± 0.01, by 2-ethyl-4-methylimidazole
While being added in epoxy resin, rate is added in no more than 1kg/min, stirring while adding, mixing speed is 50~60r/min, is stirred
The time is mixed not less than 5min；To get encapsulating insulation glue after adding in completely, 4h is interior to be completed to use.
Embodiment 2
100 parts of extracting epoxy resin is preheated to 40 DEG C；2.5 parts of 2-ethyl-4-methylimidazole is preheated to 35 DEG C, and epoxy resin claims
Control errors are measured ± 0.2,2-ethyl-4-methylimidazole weighing error is controlled ± 0.01, by 2-ethyl-4-methylimidazole side
It is added in epoxy resin, adds in rate no more than 1kg/min, stirring while adding, mixing speed is 50~60r/min, is stirred
Time is not less than 5min；To get encapsulating insulation glue after adding in completely, 4h is interior to be completed to use.
Embodiment 3
100 parts of extracting epoxy resin is preheated to 40 DEG C；3 parts of 2-ethyl-4-methylimidazole is preheated to 35 DEG C, and epoxy resin weighs
± 0.2, the control of 2-ethyl-4-methylimidazole weighing error adds 2-ethyl-4-methylimidazole side ± 0.01 control errors
Enter into epoxy resin, add in rate no more than 1kg/min, stirring while adding, mixing speed is 50~60r/min, during stirring
Between be not less than 5min；To get encapsulating insulation glue after adding in completely, 4h is interior to be completed to use.
Claims (7)
1. a kind of formula composition of dry reactor encapsulating insulation system, which is characterized in that in parts by weight for：Epoxy resin：
2-ethyl-4-methylimidazole=100:2.5-3.
2. a kind of formula composition of dry reactor encapsulating insulation system according to claim 1, which is characterized in that with weight
Part is calculated as：Epoxy resin：2-ethyl-4-methylimidazole=100:2.75.
3. a kind of preparation method of dry reactor encapsulating insulation system of claim 1 or 2 is：
(1) extracting epoxy resin is preheated to 40 DEG C, and 2-ethyl-4-methylimidazole is preheated to 35 DEG C；
(2) 2-ethyl-4-methylimidazole side is added in epoxy resin, it is stirring while adding；
(3) to get encapsulating insulation glue after adding in completely, 4h is interior to be completed to use.
4. a kind of preparation method of dry reactor encapsulating insulation system according to claim 3, it is characterised in that：Asphalt mixtures modified by epoxy resin
± 0.2,2-ethyl-4-methylimidazole weighing error is controlled ± 0.01 the control of fat weighing error.
5. a kind of preparation method of dry reactor encapsulating insulation system according to claim 3, it is characterised in that：2- second
Base -4-methylimidazole adds in rate and is not more than 1kg/min.
6. a kind of preparation method of dry reactor encapsulating insulation system according to claim 3, it is characterised in that：Stirring speed
It spends for 50~60r/min.
7. a kind of preparation method of dry reactor encapsulating insulation system according to claim 3, it is characterised in that：During stirring
Between be not less than 5min.
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| CN201711454677.2A CN108047655A (en) | 2017-12-28 | 2017-12-28 | A kind of formula and preparation method of dry reactor encapsulating insulation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117736537A (en) * | 2023-11-15 | 2024-03-22 | 国网黑龙江省电力有限公司电力科学研究院 | Preparation method of epoxy resin-glass fiber composite insulating material of dry type air-core reactor |
Citations (3)
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|---|---|---|---|---|
| JPH03221537A (en) * | 1990-01-29 | 1991-09-30 | Nippon Retsuku Kk | Prepreg for adhering metal |
| CN106977878A (en) * | 2017-03-24 | 2017-07-25 | 合肥羿振电力设备有限公司 | A kind of dry-type transformer encapsulating material and preparation method thereof |
| CN107207922A (en) * | 2015-02-05 | 2017-09-26 | 西门子公司 | Coil and the insulating tape of winding adhesive tape insulation system for motor |
-
2017
- 2017-12-28 CN CN201711454677.2A patent/CN108047655A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03221537A (en) * | 1990-01-29 | 1991-09-30 | Nippon Retsuku Kk | Prepreg for adhering metal |
| CN107207922A (en) * | 2015-02-05 | 2017-09-26 | 西门子公司 | Coil and the insulating tape of winding adhesive tape insulation system for motor |
| CN106977878A (en) * | 2017-03-24 | 2017-07-25 | 合肥羿振电力设备有限公司 | A kind of dry-type transformer encapsulating material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 殷立新等著: "《胶粘基础与胶粘剂》", 31 August 1988, 航空工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117736537A (en) * | 2023-11-15 | 2024-03-22 | 国网黑龙江省电力有限公司电力科学研究院 | Preparation method of epoxy resin-glass fiber composite insulating material of dry type air-core reactor |
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Application publication date: 20180518 |