CN202930186U - Instrument transformer - Google Patents
Instrument transformer Download PDFInfo
- Publication number
- CN202930186U CN202930186U CN 201220694863 CN201220694863U CN202930186U CN 202930186 U CN202930186 U CN 202930186U CN 201220694863 CN201220694863 CN 201220694863 CN 201220694863 U CN201220694863 U CN 201220694863U CN 202930186 U CN202930186 U CN 202930186U
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- Prior art keywords
- drum
- coil
- instrument transformer
- heat
- shrink tube
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Abstract
The utility model discloses an isolation sampling unit for digitalizing electrical parameters, i.e., a miniature current transformer, aims to the disadvantages of the prior art, and provides an instrument transformer which is fast in manufacturing speed, excellent in insulating performance and stable in quality. The instrument transformer comprises a wire spool, a coil, a heat shrink tubing and the like, and is manufactured through the steps of wire spool manufacturing, heat shrink tubing preparation, assembly and packaging, and the like. The instrument transformer provided by the utility model has the characteristics of being simple in process, high in producing efficiency, long in service life, and the like.
Description
Technical field
The utility model relates to and a kind of electrical quantity is carried out digitized isolation sampling unit-miniature electric current (voltage) instrument transformer.
Background technology
Miniature (voltage) current transformer product nearly cover the various aspects used of whole electrical energy system.Present this micro mutual inductor is to be made of primary winding, the iron core that is wound with secondary coil, plastic casing, uses the enclosure method of the bicomponent epoxy resin embedding of normal temperature cure to consist of.It is by the iron core that is wound with secondary coil that the micro mutual inductor of installing on pcb board is also arranged, and plastic casing (leaving the cheap primary winding of mesopore in the middle of plastic housing passes through) also has the method for packing of the bicomponent epoxy resin embedding of normal temperature cure to consist of.There are some problems like this in the manufacturing of the enclosure method of above-mentioned two kinds of instrument transformers: exist (1) proportioning speed to want fast in order to enter fast the next procedure embedding in proportioning bicomponent epoxy resin process, (2) 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 substandard products caused.The normal temperature bicomponent epoxy resin could thoroughly solidify after being solidificated in general 24 hours of summer, and could thoroughly solidify after needing 48 hours winter, thereby makes manufacturing cycle long.The bicomponent epoxy resin proportioning generally must be used up in 30 minutes after mixing, thereby caused a large amount of epoxy resin waste and manufacturing cost to rise.The instrument transformer that also has a kind of fairly simple encapsulation only has heat-shrink tube to make insulating barrier and the iron core that is wound with secondary coil is wound with the combined instrument transformer of insulating tape in appearance at the primary line snare, this instrument transformer insulation property, humidity resistance is poor, and productive labor intensity is large, and easily damaged.
The utility model content
As domestic instrument transformer manufacturer, company is through long-term groping, market survey, visiting compound elite school, consult domestic and international well-known expert, test etc., through the time more than 2 years, finally developed a kind of new transformer, instrument transformer is simple in structure, simultaneously manufacturing process is simplified greatly, performance index are superior instrument transformer not only.Novel instrument transformer precision is high, and the capacitance problem that has caused when having overcome former resin can is also effectively solved.The purpose of this utility model is to overcome the deficiencies in the prior art, provides that a kind of manufacturing speed is fast, good insulation preformance, stay-in-grade instrument transformer.
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, it is bonding that heat-shrink tube is coated on the both sides end wall of the two ends of coil outside and heat-shrink tube and drum, the 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 that has in the rubber, silica gel, soft PVC etc. of high temperature resistance, anti-aging, flexible, insulation consists of.
The encapsulation making method of instrument transformer of the present utility model is as follows: the first step, and the manufacturing of drum, above-mentioned drum is sulfidization molding; Second step, heat-shrink tube is prepared, and the heat-shrink tube diameter is not less than the external diameter of coil; In the 3rd step, assembling is provided with the center of coil the drum of making in the first step, and both center lines coincidences are enclosed within the coil outside to heat-shrink tube and heat-shrink tube overlaps with the center line of coil; In the 4th step, encapsulation is sent into the semi-finished product of the 3rd step preparation in baking oven, and semi-finished product are heated, and heat-shrink tube shrinks, and the two ends contraction of heat-shrink tube fits tightly with drum both sides end face respectively, and heat-shrink tube and drum seal coil fully, and the lead-out wire of coil is exposed.
As preferably, place, the axle center of drum can be provided with the iron core that cover has heat-shrink tube; The cylindrical madial wall of drum axially is provided with projection, and described projection is a plurality of, is distributed on the periphery of 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, certainly also is convenient to and heat-shrink tube fitted seal coil.
As preferably, carry out immediately hot pressing after encapsulation, make heat-shrink tube and packing ring joint place without hollow joint, described hot pressing refer to encapsulate rear 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 characteristics such as technique is simple, production and processing efficient is high, efficient long service life according to above-described instrument transformer, precision is high simultaneously, without the production capacitive effect, has improved technically precision when little electric current uses.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of drum;
Fig. 3 is end view of the present utility model.
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 the two ends of coil 3 outsides and heat-shrink tube 2 and the both sides end wall of drum 1 is fitted, and seals up coil, and coil 3 is provided with lead-out wire 4, and the lead-out wire 4 of coil is exposed; The cylindrical madial wall of described drum 1 axially is provided with projection 5, and projection 5 is a plurality of, is distributed on the periphery of madial wall of drum 1; Described protruding 5 cross section is plum blossom-shaped; The circumference at the cylinder two ends of described drum 1 is equipped with outward extending side wall 6; The place, axle center 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 manufacturing of drum 1, drum refers to the cylinder of axle center hollow, and cylindrical cross section is circular, drum be have high temperature resistance, elastomeric material anti-aging, flexible, insulation consists of, above-mentioned drum 1 is sulfidization molding; Second step, heat-shrink tube 2 is prepared, and the heat-shrink tube diameter is not less than the external diameter of coil 3; In the 3rd step, assembling is provided with the center of coil 3 drum 1 of making in the first step, and both center lines coincidences are enclosed within coil 3 outsides to heat-shrink tube 2 and heat-shrink tube 2 overlaps with the center line of coil 3; In the 4th step, encapsulation is sent into the semi-finished product of the 3rd step preparation in baking oven, semi-finished product are heated, and heat-shrink tube 2 shrinks, and shrink respectively and drum 1 both sides end face close adhesion at the two ends of heat-shrink tube 2, heat-shrink tube 2 seals coil 3 fully with drum 1, and the lead-out wire 4 of coil is exposed.
Claims (7)
1. instrument transformer, it is characterized in that: 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), heat-shrink tube (2) is coated on the two ends of coil (3) outside and heat-shrink tube (2) and the both sides end wall of drum (1) is fitted, seal up coil (3), coil (3) is provided with lead-out wire (4), and the lead-out wire of coil (4) is exposed.
2. a kind of instrument transformer according to claim 1 is characterized in that: the place, axle center of described drum (1) is provided with the iron core (8) that cover has heat-shrink tube.
3. a kind of instrument transformer according to claim 1 is characterized in that: the cylindrical madial wall of described drum (1) axially is provided with projection (5), and projection (5) is a plurality of, is distributed on the periphery of madial wall of drum.
4. a kind of instrument transformer according to claim 3, it 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: the circumference at the cylinder two ends of described drum (1) is equipped with outward extending side wall (6).
6. a kind of instrument transformer according to claim 1, it is characterized in that: the inner tubal wall of heat-shrink tube (2) scribbles hot melt adhesive layer (7).
7. a kind of instrument transformer according to claim 1 is characterized in that: drum (1) is that a kind of material in rubber with high temperature resistance, anti-aging, flexible, insulation, silica gel, soft PVC consists of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220694863 CN202930186U (en) | 2012-12-14 | 2012-12-14 | Instrument transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220694863 CN202930186U (en) | 2012-12-14 | 2012-12-14 | Instrument transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202930186U true CN202930186U (en) | 2013-05-08 |
Family
ID=48220122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220694863 Expired - Fee Related CN202930186U (en) | 2012-12-14 | 2012-12-14 | Instrument transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202930186U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000359A (en) * | 2012-12-14 | 2013-03-27 | 桐乡市伟达电子有限公司 | Transformer and package manufacturing method thereof |
-
2012
- 2012-12-14 CN CN 201220694863 patent/CN202930186U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000359A (en) * | 2012-12-14 | 2013-03-27 | 桐乡市伟达电子有限公司 | Transformer and package manufacturing method thereof |
| CN103000359B (en) * | 2012-12-14 | 2015-12-02 | 桐乡市伟达电子有限公司 | The encapsulation making method of instrument transformer and instrument transformer thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
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. |
|
| CP02 | Change in the address of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20211214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |