CN107123526B - The production method of insulating cylinder with function of shielding - Google Patents
The production method of insulating cylinder with function of shielding Download PDFInfo
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- CN107123526B CN107123526B CN201610102444.5A CN201610102444A CN107123526B CN 107123526 B CN107123526 B CN 107123526B CN 201610102444 A CN201610102444 A CN 201610102444A CN 107123526 B CN107123526 B CN 107123526B
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- adhesive
- insulating cylinder
- copper foil
- shielding
- winding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulating Bodies (AREA)
Abstract
The present invention relates to electrical equipments, the specifically production method of the insulating cylinder with function of shielding, using formed by winding glass reinforced plastic technique, it will be on the glass fiber winding to core model of dipped resin adhesive liquid, when being wound to certain thickness fiber, the copper foil for the semi-solid preparation for impregnating adhesive is laid on the glass fibers, is further continued for winding, until required thickness, by solidify, releasing process be made described in the insulating cylinder with function of shielding.The present invention uses winding shaping process and dedicated adhesive, organically combines copper foil easily with glass reinforced plastic, makes glass fibre reinforced plastic cylinder have the function of to insulate and shield two kinds, meets transformer manufacturing requirement.
Description
Technical field
The present invention relates to electrical equipments, specifically, being a kind of matched with transformer exhausted with function of shielding
The production method of edge cylinder.
Background technique
Power industry is to support the infrastructural industries and public utilities of national economy and social development, and transformer is then defeated
The particularly significant equipment of distribution system.Therefore, to the innovation for designing and manufacturing technique of transformer, new material is selected, improves and becomes
Depressor quality, reduces its cost, and is the essential condition for promoting China's electric power industry development.
Since reform and opening-up, the production that China's transformer industry achieves tremendous development, especially small capacity transformer is gathered around
There is comparable strength, occupied an important position in competition in the international market, occupies considerable share in American-European some developed countries.But
In terms of high capacity, ultra-high capacity transformer, the technical strength in China is also weaker, hinders the hair of China's transformer industry
Exhibition.The demand driving in market transformer is to high frequency, high capacity, efficient low-consume, low cost and low-noise energy-saving environmental protection direction
Development, this each link of industrial chain for just needing to produce transformer will make great efforts to create conditions towards this direction.
Transformer also will receive the influence of high-frequency alternating magnetic field as Other Instruments instrument.Therefore, it is necessary to try as far as possible
Reduce this adverse effect.Currently, in order to solve this problem, generalling use copper cover in transformer manufacturing to shield high frequency
Alternating magnetic field.Glass fibre reinforced plastic insulating cylinder early has been widely used for the manufacture of transformer, but the glass fibre reinforced plastic insulating cylinder with function of shielding
It has not been reported.
Chinese patent literature CN204303515U discloses a kind of dry type phase-shifting commutation change with function of shielding insulating cylinder
Depressor, the insulating cylinder include insulating cylinder main body, are equipped with shielded layer, insulating cylinder main body and shielded layer in the interlayer of insulating cylinder main body
Solidification is integrated；The shielded layer is one whole or multistage copper foil or aluminium foil, multistage copper foil or aluminium foil adjacent bit be equipped with it is certain between
Away from；There is setting spacing in shielded layer threshold value insulating cylinder end；Insulating cylinder further includes ground strip, and ground strip welding is drawn；Ground connection
The contact position of piece and insulating cylinder bottom part body is equipped with boss, it is ensured that does not leak copper.Chinese patent literature CN102360841A is disclosed
A kind of earthing production method of dry-type rectifier transformer, make exterior loop insulating cylinder when, first insulating cylinder for winding, insulating cylinder not around
When complete, start to be bonded earthing；Earthing copper foil is placed on the outside of semi-finished product insulating cylinder, insulating cylinder for winding, coiling are then proceeded to
After the completion, earthing is with insulating cylinder drying forming.But all without selection adhesive applicating in copper in the above two pieces patent
On foil, makes copper foil and glass reinforced plastic is organic combines closely, but directly copper foil is laid on fiber reinforced plastic barrel.Such product,
When changing repeatedly through high/low temperature, copper foil is easy to foaming, can loosen, and influences the insulation performance and shielding properties of insulating cylinder, product quality
Stability is poor, and copper foil laying process operability is also poor.If copper foil laying is bad, the qualification rate and production of product will affect
Quality.
Summary of the invention
It is matched with transformer with function of shielding insulating cylinder that the purpose of the present invention is to provide one kind, and the insulating cylinder is with ring
Oxygen resin is matrix, and glass fiber reinforcement tries copper foil being embedded in insulating cylinder using winding shaping process and a kind of adhesive
Body makes glass fibre reinforced plastic cylinder have the function of to insulate and shield two kinds, meets transformer manufacturing requirement.
Although the traditional product of transformer, there are also certain market, it is very fierce to compete, profit margin very little, to make
Power transformer product dominates the market with competitiveness, to adapt to the demand of electric power industry development, it is necessary to develop high performance-price ratio new one
The high-end product in generation.The manufacturing cost of transformer is also one of the factor for hindering transformer to develop to high frequency, high capacity.Cause
This, the problem of how reducing the material cost and cost of labor of transformer, just shows especially out.
Industrialized development, it is increasing to the demand of transformer, it is higher and higher to its quality requirement.Transformer manufacturing
Quotient considers electrical isolation and magnetic screen problem in the design of transformer, but the method solved and measure are then to consider respectively
's.So, it often makes troubles when manufacturing transformer, not only time-consuming but also waste material.Moreover, if not in assembling
It keeps on improving, it is also possible to influence the total quality and service life of transformer.
The present invention utilizes E51 epoxy resin, methyl tetrahydro phthalic anhydride curing agent, glass fibre, copper foil and special-purpose adhesive etc.
Material produces the insulating cylinder that diameter 100mm~1100mm has function of shielding using winding shaping process.
The first aspect of the present invention provides the production method of the insulating cylinder with function of shielding, using glass reinforced plastic winding at
Type technique, when by the glass fiber winding to core model of dipped resin adhesive liquid, being wound to certain thickness fiber, impregnating glue
The copper foil of the semi-solid preparation of stick is laid on the glass fibers, is further continued for winding, until required thickness, by solidifying, demoulding
The insulating cylinder with function of shielding is made in technique.The diameter of the insulating cylinder is 100mm~1100mm.
Raw material in the resin adhesive liquid is E51 epoxy resin, methyl tetrahydro phthalic anhydride, dimethylamine, and weight ratio is (90-
110): (75-85): (0.4-0.6), preferably 100: 80: 0.5.
Although the technique using Wrapping formed fiber reinforced plastic barrel is mature technology using glass fibre and epoxy resin,
It is that the formula of resin adhesive liquid is had nothing in common with each other according to the type of resin.It is found in our test, each material in resin adhesive liquid
All have an impact with the quality for comparing winding shaping process and product, resin adhesive liquid formula of the invention is true by test of many times
Fixed.The present invention verifies in development process by repeated tests, as epoxy resin (E51): methyl tetrahydro phthalic anhydride: diformazan
Amine is (90-110): (75-85): when (0.4-0.6), using the shielding of product made from winding shaping process of the invention
Energy, heat resistance, insulating properties and stability all meet the requirements, wherein epoxy resin (E51): methyl tetrahydro phthalic anhydride: dimethylamine=100
: product properties are best when 80: 0.5 (weight ratio).
The best proportion for preparation process of the invention that the above ratio is that verify by repeated tests meet, when
When proportions exceed range above, such as: as epoxy resin (E51): methyl tetrahydro phthalic anhydride: dimethylamine=80: when 90: 0.3,
Product is qualified, but methyl tetrahydro phthalic anhydride is caused largely to waste, and beginning reaction speed is slower, causes to be permitted to winding shaping process
It is mostly difficult；As epoxy resin (E51): methyl tetrahydro phthalic anhydride: dimethylamine=120: when 60: 0.8, epoxy resin cure is incomplete,
Insulating cylinder can't meet the quality requirement.
The present invention has screened a kind of adhesive simultaneously, and the adhesive and epoxy resin have preferable compatibility, has with copper foil
Good cementability, and with heat-resisting and room temperature curing characteristic；A kind of simple and easy method that copper foil is introduced to glass reinforced plastic is realized,
It has been determined that production has the production technology of function of shielding insulating cylinder.The preferred Red Star board all-transparent 509 of adhesive of the present invention
Glue.
There are many type of adhesive, and all kinds of adhesive all have certain characteristic, are applicable in certain application.Therefore,
For using for unit, the adhesive for being suitble to oneself is screened according to the quality requirement of product and molding technological condition.Root
According to the embedded mode of glass reinforced plastic winding technique and copper foil, preferably choosing is coated in adhesive on copper foil, at room temperature can
Solidification.When adhesive is in semi-cured state, the copper foil that laying is coated with adhesive facilitates operation, and will not generate quality
Problem.In addition, being coated in the adhesive of copper foil will combine with the epoxy resin of winding fiber, this requires selected adhesive
There is good compatibility with E51 epoxy resin, just copper foil can be made closely to organically combine with glass reinforced plastic in this way.
In screening process, the present invention attempted not use adhesive, and directly copper foil is laid on fiber reinforced plastic barrel, but
When being that the insulating cylinder of finished product changes repeatedly through high/low temperature, copper foil is easy to foaming, can loosen, and influences the insulation performance and shielding of insulating cylinder
Performance, stable product quality is poor, and copper foil laying process operability is also poor.If copper foil laying is bad, production will affect
The qualification rate and product quality of product.
The present invention select adhesive principle be: ambient temperature curable, with epoxy resin (E51) compatibility it is good, it is heat-resist,
It is high with copper foil adhesive strength.According to this requirement and our working experience, the present invention to the adhesive products of market supply into
Row repeatedly compare by screening, it is found that the performance of 509 glue of Red Star board all-transparent and application range meet the requirements, test proves that,
The glue is entirely capable of reaching product quality and moulding process requirement, has finally chosen 509 glue of Red Star board all-transparent.509 glue
It is a kind of bi-component epoxide-resin with excellent combination property, fine heat-resisting performance can be with room temperature curing, with E51 asphalt mixtures modified by epoxy resin
Rouge has good compatibility, has good cementability with copper foil.The present invention first impregnates copper foil deployed epoxy adhesive,
When the adhesive on copper foil is in semi-cured state, then copper foil laying is carried out, realized a kind of that copper foil insertion glass reinforced plastic is effective
The simple and easy method of specification.Copper foil can be made easily to organically combine with glass reinforced plastic using 509 glue of Red Star board all-transparent, it is obtained
For insulating cylinder through thermocycling, copper foil is not blistering, does not loosen, and the insulation performance and shielding properties of glass fibre reinforced plastic cylinder do not change, matter
Amount is stablized.
With the function of shielding insulating cylinder technological process of production: formed by winding glass reinforced plastic technique is used, by dipped resin adhesive liquid
Continuous fiber (or strap etc.) be wound on core model according to certain rule, then by solidification, demoulding etc. processes obtain product.
Its process flow block diagram is as shown in Figure 1.Specific steps:
1, it is installed according to the specification of product and requirement, manufacture or selection core model, coating release agent；
2, the preparation of glue: epoxy resin (E51): methyl tetrahydro phthalic anhydride: dimethylamine=100: 80: 0.5 (weight ratios)；
3, the preparation of adhesive: the adhesive of selection is 509 glue of Red Star board all-transparent, and the adhesive is by two kinds of first, second
Group is grouped as, and when use is prepared according to a certain percentage；
4, copper foil is impregnated into prepared adhesive, and stops 2-4 hour in air, solidify adhesive segment
(commonly referred to as semi-solid preparation), i.e. adhesive not sagging, it is tack-free；
5, start glass fibre control system, make glass fibre by steeping vat, adjust fiber speed, glue is allowed to be impregnated with fibre
Dimension, general control is at 40-60 ms/min；
6, according to the requirement of client, when winding certain thickness fiber on core model, then the copper foil of semi-solid preparation by wanting
It asks laying on the glass fibers, is further continued for winding, until required thickness；
7, curing process: Wrapping formed fiber reinforced plastic barrel will be put into baker heating and be solidified, generally slowly by room temperature
It is raised to assigned temperature and stops heating, kept the temperature.Due to product size and wall thickness all not exclusively as, solidification temperature
It is all different with curing time.General temperature control is within the scope of 150~210 DEG C, and curing time is between 1.5~2.5 hours；
8, releasing process: with the demoulding of common winding product, extrusion method demoulding is generallyd use；
9, surface working process aftertreatment technology: is carried out to product using technique for grinding.
The second aspect of the present invention provides a kind of insulating cylinder with function of shielding, using any of the above producer legal system
It is standby to obtain.
The invention has the advantages that:
The present invention is to carry out innovative design, the insulating cylinder is with epoxy on the basis of the insulating cylinder that transformer generally uses
Resin is matrix, and glass fiber reinforcement has copper foil easily with glass reinforced plastic using winding shaping process and dedicated adhesive
Machine combines, and makes glass fibre reinforced plastic cylinder have the function of to insulate and shield two kinds, transformer manufacturing requirement is met, through thermocycling, copper
Foil is not blistering, does not loosen, and the insulation performance and shielding properties of glass fibre reinforced plastic cylinder do not change, and quality is stablized, and is fully achieved and becomes with H grades
The matched requirement of depressor.
Detailed description of the invention
Fig. 1 is the process flow chart of the production method with function of shielding insulating cylinder of the invention.
Fig. 2 is the finished product of the insulating cylinder prepared by the present invention with function of shielding.
Specific embodiment
It elaborates below with reference to embodiment to specific embodiment provided by the invention.
Embodiment 1
The process flow with the insulating cylinder of function of shielding is produced, it is exhausted with function of shielding to produce diameter 500mm below
For edge cylinder:
1, it release agent 295-3 estersil (manufacturer: Shanghai Resin Factory Co., Ltd.) and is installed on the core model chosen；
2, weigh respectively 50 kilograms of epoxy resin (E51), 40 kilograms of methyl tetrahydro aniline, 0.25 kilogram of dimethylamine be put into and match
Material kettle opens stirring, stirs 10 minutes, is put into steeping vat；
3,509 2 kilograms of glue first components are taken, 1 kilogram of second component is put into deep bid container, is reconciled about 10 points with scraper
Then the copper foil cut is immersed in disk in glue about 2 minutes, then hauls out copper foil from glue hang up at leisure by clock.
About 2 hours, some solidifications of copper foil glue, copper foil, can not be laid on as required on the cylinder of winding glass by sagging；
4, adjusting glass running speed is 45 meters per minute, makes glass by the glue in glue groove；
5, by certain Winding theory, when the glass wound on core model about 1mm thickness, suspend vehicle, the copper of semi-solid preparation
Foil is laid, and suitably fixed, then proceedes to wind, until fiber reinforced plastic barrel wall thickness stops up to 5mm；
6, the product wound is put into baker, carries out resin solidification, temperature controls 180 DEG C, keeps the temperature 2 hours, works as temperature
When degree is cooled to 50~60 DEG C, product is taken out；
7, demould product and polished post-processing.
Using above-mentioned same glue formula and production technology, produce different diameter specifications has function of shielding insulation
Cylinder, after tested, Specifeca tion speeification is as follows:
Detection method: GB/T23100-2008
The laying of copper foil is carried out by transformer manufacturing unit design requirement, and the shield effectiveness of product meets the requirements.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, under the premise of not departing from the method for the present invention, can also make several improvement and supplement, these are improved and supplement also should be regarded as
Protection scope of the present invention.
Claims (2)
1. a kind of method for preparing the insulating cylinder with function of shielding, including the following steps:
(A) it is installed according to the specification of product and requirement, manufacture or selection core model, coating release agent；
(B) preparation of glue: E51 epoxy resin: methyl tetrahydro phthalic anhydride: the weight ratio of dimethylamine is 100: 80: 0.5；
(C) preparation of adhesive；
(D) copper foil is impregnated into prepared adhesive, and stopped 2 hours~4 hours in air, solidify adhesive segment,
That is adhesive not sagging, it is also tack-free；
(E) start glass fibre control system, make glass fibre by steeping vat, adjust fiber speed, glue is allowed to be impregnated with fiber,
Control is at 40 ms/min~60 ms/min；
(F) as requested, certain thickness fiber is wound on core model, then the copper foil of semi-solid preparation is laid on glass fibre
On, it is further continued for winding, until required thickness；
(G) curing process: Wrapping formed fiber reinforced plastic barrel is put into baker heating and is solidified, and specified temperature is slowly raised to by room temperature
Degree stops heating, is kept the temperature, and temperature is controlled at 150 DEG C~210 DEG C, and curing time was at 1.5~2.5 hours；
(H) demoulding and grinding process.
2. the method as described in claim 1, which is characterized in that wherein the diameter of the insulating cylinder is 100mm~1100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610102444.5A CN107123526B (en) | 2016-02-25 | 2016-02-25 | The production method of insulating cylinder with function of shielding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610102444.5A CN107123526B (en) | 2016-02-25 | 2016-02-25 | The production method of insulating cylinder with function of shielding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107123526A CN107123526A (en) | 2017-09-01 |
| CN107123526B true CN107123526B (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610102444.5A Active CN107123526B (en) | 2016-02-25 | 2016-02-25 | The production method of insulating cylinder with function of shielding |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111016212A (en) * | 2019-12-31 | 2020-04-17 | 溧阳伊科创绝缘材料技术有限公司 | Manufacturing process of gun nozzle insulating tube of high-temperature gas shielded welding gun |
| CN115401960A (en) * | 2022-09-01 | 2022-11-29 | 哈尔滨玻璃钢研究院有限公司 | Resin-based composite material with high electromagnetic shielding efficiency and forming method and application thereof |
| CN115972612A (en) * | 2022-12-26 | 2023-04-18 | 核工业理化工程研究院 | Method and device for forming high-precision composite material cylinder with ultrathin nonferrous metal foil inner wall |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09260153A (en) * | 1996-03-22 | 1997-10-03 | Toshiba Corp | Gas insulated transformer |
| CN203260458U (en) * | 2012-12-27 | 2013-10-30 | 正泰电气股份有限公司 | Electrostatic shielding device for dry-type isolation transformer of more than 6kV |
| CN203491072U (en) * | 2013-07-31 | 2014-03-19 | 鲁特电工股份有限公司 | Grounding shielding device for dry-type rectifier excitation transformer |
| CN204303515U (en) * | 2014-12-31 | 2015-04-29 | 金盘电气集团（上海）有限公司 | With the dry type phase-shifting rectifier transformer of function of shielding insulating cylinder |
| CN204558222U (en) * | 2015-05-05 | 2015-08-12 | 上海和鸣变压器有限公司 | A kind of superconducting transformer glass fibre reinforced plastic cylinder |
| CN205028764U (en) * | 2015-09-25 | 2016-02-10 | 大同Abb牵引变压器有限公司 | Traction transformer's shielding subassembly |
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2016
- 2016-02-25 CN CN201610102444.5A patent/CN107123526B/en active Active
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