CN103000359B - The encapsulation making method of instrument transformer and instrument transformer thereof - Google Patents
The encapsulation making method of instrument transformer and instrument transformer thereof Download PDFInfo
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- CN103000359B CN103000359B CN201210544754.4A CN201210544754A CN103000359B CN 103000359 B CN103000359 B CN 103000359B CN 201210544754 A CN201210544754 A CN 201210544754A CN 103000359 B CN103000359 B CN 103000359B
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Abstract
The invention discloses a kind of encapsulation making method electrical quantity being carried out to digitized isolation sampling unit-micro-transformer of current and instrument transformer thereof; The object of the invention is to overcome the deficiencies in the prior art, provide that a kind of manufacturing speed is fast, the encapsulation making method of good insulation preformance, stay-in-grade instrument transformer and instrument transformer thereof; It comprises drum, coil, heat-shrink tube etc., and it is the manufacture by drum, the preparation of heat-shrink tube, assembling, the step manufactures such as encapsulation; It has the features such as technique is simple, production and processing efficiency is high, efficiency long service life.
Description
Technical field
The present invention relates to a kind of encapsulation making method electrical quantity being carried out to digitized isolation sampling unit-miniature electric current (voltage) instrument transformer and instrument transformer thereof.
Background technology
The various aspects of the whole electrical energy system application of miniature (voltage) current transformer product nearly cover.Present this micro mutual inductor is made up of primary winding, the iron core being wound with secondary coil, plastic casing, forms with the enclosure method of the bicomponent epoxy resin embedding of normal temperature cure.Also have the micro mutual inductor installed on pcb board to be by the iron core being wound with secondary coil, plastic casing (leaving the cheap primary winding of mesopore in the middle of plastic housing to pass through), also has the method for packing of the bicomponent epoxy resin embedding of normal temperature cure to form.There are some problems like this in the manufacture of the enclosure method of above-mentioned two kinds of instrument transformers: in proportioning bicomponent epoxy resin process, there is (1) proportioning speed want fast to enter next procedure embedding fast, (2) can not proportioning in enormous quantities, (3) meeting as improper in proportioning causes epoxy resin thoroughly not solidify and decreasing insulating, the high pressure resistant phenomenon such as bad, thus cause substandard products.Could thoroughly solidify after normal temperature bicomponent epoxy resin is solidificated in general 24 hours of summer, and ability thoroughly solidification after needing 48 hours winter, thus make manufacturing cycle long.Bicomponent epoxy resin proportioning is general after mixing must be used up in 30 minutes, thus caused a large amount of epoxy resin wastes and manufacturing cost to rise.Also have a kind of instrument transformer of fairly simple encapsulation only to have heat-shrink tube to make insulating barrier at primary line snare and be wound with the combined instrument transformer of insulating tape with the iron core being wound with secondary coil in appearance, the instrument transformer insulation property that this method manufactures, humidity resistance is poor, productive labor intensity is large, and easily damaged.
Summary of the invention
As domestic instrument transformer manufacturer, company through long-term to grope, market survey, visit compound elite school, consult domestic and international well-known expert, test etc., through the time more than 2 years, finally have developed a kind of new transformer, the instrument transformer instrument transformer that not only structure is simple, manufacturing process simplifies greatly, performance index are superior simultaneously.Novel instrument transformer precision is high, and the capacitance problem caused when resin is filling before overcoming also effectively is solved.The object of the invention is to overcome the deficiencies in the prior art, provide that a kind of manufacturing speed is fast, the encapsulation making method of good insulation preformance, stay-in-grade instrument transformer and instrument transformer thereof.
A kind of instrument transformer, it comprises drum, coil, heat-shrink tube, described three's center line overlaps, drum refers to the cylinder of axle center hollow, and cylindrical cross section is circular, and coil is arranged on drum, heat-shrink tube is coated on outside coil and the both sides end wall of the two ends of heat-shrink tube and drum bonds, band coil, coil is provided with lead-out wire, and the lead-out wire of coil is exposed.
Drum can be that a kind of material had in the rubber, silica gel, soft PVC etc. of high temperature resistance, anti-aging, flexible, insulation is formed.
The encapsulation making method of instrument transformer of the present invention is as follows: the first step, the manufacture of drum, and above-mentioned drum is sulfidization molding; Second step, heat-shrink tube prepares, and heat-shrink tube diameter is not less than the external diameter of coil; 3rd step, assembling, is provided with the center of coil the drum manufactured in the first step, and both center lines overlap, and heat-shrink tube is enclosed within outside coil and heat-shrink tube overlaps with the center line of coil; 4th step, encapsulation, semi-finished product prepared by the 3rd step are sent in baking oven, and semi-finished product are heated, and heat-shrink tube shrinks, and the two ends of heat-shrink tube are shunk and fitted tightly with drum both sides end face respectively, heat-shrink tube and drum coil is completely closed, the lead-out wire of coil is exposed.
As preferably, the axle center place of drum can be provided with the iron core that cover has heat-shrink tube; The cylindrical madial wall of drum is axially provided with projection, and described projection is multiple, is distributed on the periphery of the madial wall of drum, and as preferably, the projection of drum is plum blossom-shaped.
As preferably, the circumference at the cylinder two ends of described drum is equipped with outward extending side wall, stops cover coil landing thereon, is certainly also convenient to and heat-shrink tube fitted seal coil.
As preferably, carry out hot pressing immediately after encapsulation, make heat-shrink tube and packing ring joint place without hollow joint, after described hot pressing refers to encapsulation, product before cooling immediately to axial two side pressures of product once.
The inner tubal wall of heat-shrink tube described above can scribble hot melt adhesive layer.
Have the features such as technique is simple, production and processing efficiency is high, efficiency long service life according to the closed manufacture method of above-described instrument transformer, precision is high simultaneously, without production capacitive effect when small area analysis uses, improves precision technically.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of drum;
Fig. 3 is end view of the present invention.
Embodiment
In Fig. 1, Fig. 2, Fig. 3, a kind of instrument transformer, it comprises drum 1, coil 3, heat-shrink tube 2, and described three's center line overlaps, and drum 1 refers to the cylinder of axle center hollow, and cylindrical cross section is circular; Coil 3 is arranged on drum 1, and heat-shrink tube 2 is coated on outside coil 3 and the both sides end wall of the two ends of heat-shrink tube 2 and drum 1 is fitted, and seal up coil, coil 3 is provided with lead-out wire, and the lead-out wire of coil is exposed; The cylindrical madial wall of described drum 1 is axially provided with protruding 5, and protruding 5 is multiple, is distributed on the periphery of the madial wall of drum; The cross section of described projection 5 is plum blossom-shaped; The circumference at the cylinder two ends of described drum 1 is equipped with outward extending side wall 6; The axle center place of described drum 1 is provided with the iron core 8 that cover has heat-shrink tube 2; The inner tubal wall of heat-shrink tube 2 scribbles hot melt adhesive layer 7.
Its encapsulation making method is as follows:
The first step, the manufacture of drum 1, drum refers to the cylinder of axle center hollow, and cylindrical cross section is circular, drum be have high temperature resistance, anti-aging, flexible, insulation elastomeric material form, above-mentioned drum 1 is sulfidization molding; Second step, heat-shrink tube 2 prepares, and heat-shrink tube diameter is not less than the external diameter of coil 3; 3rd step, assembling, is provided with the center of coil 3 drum 1 manufactured in the first step, and both center lines overlap, and heat-shrink tube 2 is enclosed within outside coil 3 and heat-shrink tube 2 overlaps with the center line of coil 3; 4th step, encapsulation, sends into semi-finished product prepared by the 3rd step in baking oven, semi-finished product are heated, and heat-shrink tube 2 shrinks, the two ends of heat-shrink tube 2 shrink respectively with drum 1 both sides end face close adhesion, heat-shrink tube 2 is completely closed coil 3 with drum 1, and the lead-out wire 4 of coil is exposed.
Claims (7)
1. an instrument transformer, it is characterized in that: it comprises drum (1), coil (3), heat-shrink tube (2), the center line of described drum (1), coil (3), heat-shrink tube (2) overlaps, and drum (1) refers to the cylinder of axle center hollow, and cylindrical cross section is circular; Coil (3) is arranged on drum (1), heat-shrink tube (2) is coated on coil (3) outside and the both sides end wall of the two ends of heat-shrink tube (2) and drum (1) is fitted, seal up coil (3), coil (3) is provided with lead-out wire (4), and the lead-out wire (4) of coil is exposed; The circumference at the cylinder two ends of described drum (1) is equipped with outward extending side wall (6), the inner tubal wall of heat-shrink tube (2) scribbles hot melt adhesive layer (7), and side wall (6) stops the coil landing that is enclosed within drum (1) and is convenient to and heat-shrink tube fitted seal coil.
2. a kind of instrument transformer according to claim 1, is characterized in that: the axle center place of described drum (1) is provided with the primary current line (8) that cover has heat-shrink tube (2).
3. a kind of instrument transformer according to claim 1, is characterized in that: the cylindrical madial wall of described drum (1) is axially provided with projection (5), and protruding (5), for multiple, are distributed on the periphery of the madial wall of drum.
4. a kind of instrument transformer according to claim 3, is characterized in that: the cross section of described projection (5) is plum blossom-shaped.
5. a kind of instrument transformer according to claim 1, is characterized in that: drum (1) is made up of a kind of material in rubber, silica gel, soft PVC material.
6. an encapsulation making method for instrument transformer, is characterized in that: the first step, the manufacture of drum (1), and above-mentioned drum (1) is sulfidization molding; Second step, heat-shrink tube (2) prepares, and heat-shrink tube diameter is not less than the external diameter of coil (3); 3rd step, assembling, arranges the drum (1) manufactured in the first step in the center of coil (3), both center lines overlap, and heat-shrink tube (2) is enclosed within outside coil (3) and heat-shrink tube (2) overlaps with the center line of coil (3); 4th step, encapsulation, semi-finished product prepared by the 3rd step are sent in baking oven, semi-finished product are heated, heat-shrink tube (2) shrinks, the two ends of heat-shrink tube (2) are shunk and are fitted tightly with drum (1) both sides end face respectively, and heat-shrink tube (2) and drum (1) are completely closed for coil (3), and the lead-out wire (4) of coil is exposed.
7. the encapsulation making method of a kind of instrument transformer according to claim 6, is characterized in that: carry out hot pressing immediately after packaging, and after described hot pressing refers to encapsulation, product before cooling immediately to axial two side pressures of product once.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210544754.4A CN103000359B (en) | 2012-12-14 | 2012-12-14 | The encapsulation making method of instrument transformer and instrument transformer thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210544754.4A CN103000359B (en) | 2012-12-14 | 2012-12-14 | The encapsulation making method of instrument transformer and instrument transformer thereof |
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| Publication Number | Publication Date |
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| CN103000359A CN103000359A (en) | 2013-03-27 |
| CN103000359B true CN103000359B (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210544754.4A Active CN103000359B (en) | 2012-12-14 | 2012-12-14 | The encapsulation making method of instrument transformer and instrument transformer thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105023740B (en) * | 2014-04-30 | 2017-02-01 | 桐乡市伟达电子有限公司 | Micro mutual inductor and packaging manufacturing method thereof |
| CN110890200B (en) * | 2019-11-05 | 2020-10-27 | 浙江永泰隆电子股份有限公司 | Mutual inductor, packaging manufacturing method thereof and electric instrument thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7046112B2 (en) * | 2004-01-26 | 2006-05-16 | Halliburton Energy Services, Inc. | Logging tool induction coil form |
| CN1841586A (en) * | 2005-04-02 | 2006-10-04 | 衡阳华瑞高压电力电器有限公司 | Silicon oil solidifying full dry type mutual inductor, wall bushing primary winding and its making method |
| CN201600982U (en) * | 2010-01-18 | 2010-10-06 | 深圳顺络电子股份有限公司 | Winding power inductance component |
| CN202930186U (en) * | 2012-12-14 | 2013-05-08 | 桐乡市伟达电子有限公司 | Instrument transformer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4026128B2 (en) * | 2002-08-22 | 2007-12-26 | ミネベア株式会社 | Bobbin for coil |
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- 2012-12-14 CN CN201210544754.4A patent/CN103000359B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7046112B2 (en) * | 2004-01-26 | 2006-05-16 | Halliburton Energy Services, Inc. | Logging tool induction coil form |
| CN1841586A (en) * | 2005-04-02 | 2006-10-04 | 衡阳华瑞高压电力电器有限公司 | Silicon oil solidifying full dry type mutual inductor, wall bushing primary winding and its making method |
| CN201600982U (en) * | 2010-01-18 | 2010-10-06 | 深圳顺络电子股份有限公司 | Winding power inductance component |
| CN202930186U (en) * | 2012-12-14 | 2013-05-08 | 桐乡市伟达电子有限公司 | Instrument transformer |
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| CN103000359A (en) | 2013-03-27 |
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Address after: 314500 1-2 floors of 7 blocks, 320 Tongsheng Road, Fengming Street, Tongxiang City, Jiaxing City, Zhejiang Province Patentee after: Tongxiang Weida Electronics Co., Ltd. Address before: 314500 Ren'an Dam, Zhongan Village, Zhouquan Town, Tongxiang City, Jiaxing City, Zhejiang Province Patentee before: Tongxiang Weida Electronics Co., Ltd. |