CN105261442A - Outdoor voltage transformer with large structure and casting technology of outdoor voltage transformer - Google Patents
Outdoor voltage transformer with large structure and casting technology of outdoor voltage transformer Download PDFInfo
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- CN105261442A CN105261442A CN201510582832.3A CN201510582832A CN105261442A CN 105261442 A CN105261442 A CN 105261442A CN 201510582832 A CN201510582832 A CN 201510582832A CN 105261442 A CN105261442 A CN 105261442A
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Abstract
The invention relates to an outdoor voltage transformer with a large structure and a casting technology of the outdoor voltage transformer. The outdoor voltage transformer comprises the following components in parts by weight: 100 parts of epoxy resin, 90 parts of a curing agent, 4 parts of a flexibilizer and 330-350 parts of a filler. The casting technology comprises a preparation process, a mixing process, a casting process, a curing process and the like. The used components are reasonable in proportion; the casting technology is scientific; the condition that materials are kept in relatively high tenacity and strength in a curing process is ensured by reasonable preheating; and the molded product has relatively high thermal mechanical property and electrical property, and has good cold and hot shock resistance and desiccation resistance.
Description
Technical field
The present invention relates to instrument transformer production technical field, specifically a kind of macrostructure outdoor voltage transformer and casting process thereof.
Background technology
Instrument transformer (instrumenttransformer) is also called instrument transformer, is the general designation of current transformer and voltage transformer.High voltage can be become low-voltage, big current becomes small area analysis, for measuring or protection system.High voltage or big current scaling transformation are mainly become normal low voltage (100V) or standard small area analysis (5A or 1A by its function; all refer to rated value), to realize standardization, the miniaturization of measuring instrument, proterctive equipment and automatic control equipment.Instrument transformer also can be used to separate high-voltage system simultaneously, to ensure the safety of the person and equipment, uses widely.
At some transformation website, need the voltage transformer using some macrostructures, because macrostructure voltage transformer product outsourcing resin bed is thicker, during epoxy resin chemistry reaction, internal stress is large, easily cause the internal stress of interiors of products not discharge completely, cause interiors of products to occur fine cracks, affect the partial discharge index of product, product even can be made to ftracture in operation of power networks process because internal stress effect produces and puncture over the ground, cause operation of power networks accident.
Summary of the invention
In order to improve the structural strength of instrument transformer, improving its process industrial art performance and the combination property such as thermomechanical property and electric heating, the invention provides a kind of macrostructure outdoor voltage transformer and casting process thereof.
The present invention solves its technical problem and realizes by the following technical solutions:
A kind of macrostructure outdoor voltage transformer, its component comprises epoxy resin, curing agent, flexibilizer and filler, and the quality proportioning of described each component is: epoxy resin 100 parts, 90 parts, curing agent, flexibilizer 4 parts, filler 330 parts to 350 parts.
A kind of casting process of macrostructure outdoor voltage transformer comprises the following steps:
(1) prepare:
A. by die-filling mould preliminary drying more than 3 hours in 80 DEG C of baking ovens;
B. a mixing tank and No. two batch cans are all preheated to 60 DEG C;
C. by terminal mixing tank preheating temperature to 60 DEG C;
D. by pouring can preheating temperature to 80 DEG C, coil die is put into the degassed process of pouring can;
E. by filler drying more than 4 hours in 100 DEG C ~ 110 DEG C baking ovens;
(2) batch mixing:
A. the epoxy resin weighed is poured in a mixing tank, curing agent is poured in No. two mixing tanks, then stir 5 ~ 10 minutes, then pressurize 10 ~ 15 minutes under vacuum 300 ~ 500Pa condition;
B. 170 ~ 180 parts of fillers are added in a mixing tank, 160 ~ 170 parts of fillers are added in No. two mixing tanks, after stirring 2 ~ 3 minutes respectively, pressurize 40 ~ 60 minutes under vacuum 300 ~ 500Pa condition;
C. the material after process is taken out respectively from a mixing tank and No. two mixing tanks and put into terminal mixing tank, mix under vacuum 500 ~ 1000Pa environment, because material viscosity is large, therefore a blowing may still have remnants at tank skin and cause actual Aggregate Feeding Error, thus stop after 5 minutes again by the material blowing in a mixing tank and No. two mixing tanks once; After degassed 30 ~ 40 minutes, bubble-free in material to be mixed, can pour into a mould;
(3) pour into a mould: slowly pour in the mould of 75 ~ 80 DEG C by the compound through fully process, after casting complete, coil continues maintenance 10 ~ 15 minutes under vacuo, pushes curing oven subsequently;
(4) solidify: first curing temperature is 85 DEG C, keeps 6 ~ 8 hours, promote temperature to 100 DEG C afterwards, keep 3 hours, the then demoulding; Post RDBMS temperature is 125 DEG C, and keep 10 hours, after having solidified, instrument transformer should slowly cool to room temperature in an oven.
The invention has the beneficial effects as follows: the present invention's each composition proportion used is reasonable, casting process science, the reasonable preheating of equipment be ensure that material keeps higher toughness and intensity in the curing process, product after shaping has higher thermomechanical property and good electrical property, has good cold-and-heat resistent impact property and anti-dry and cracked performance.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the present invention's process viscosity change broken line graph at 60 DEG C and 80 DEG C;
Fig. 2 is that initial viscosity of the present invention varies with temperature broken line graph;
Fig. 3 varies with temperature broken line graph curing time of the present invention;
Fig. 4 is that loss factor of the present invention varies with temperature broken line graph;
Fig. 5 is dielectric constant with temperature of the present invention change broken line graph.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with specific embodiment, setting forth the present invention further.
Referring to figs. 1 through Fig. 5, be specifically implemented as follows:
Embodiment one:
A kind of macrostructure outdoor voltage transformer, its component comprises epoxy resin, curing agent, flexibilizer and filler, and the quality proportioning of described each component is: epoxy resin 100 parts, 90 parts, curing agent, flexibilizer 4 parts, filler 330 parts.
A casting process for macrostructure outdoor voltage transformer, comprises the following steps:
(1) prepare:
A. by die-filling mould preliminary drying more than 3 hours in 80 DEG C of baking ovens;
B. a mixing tank and No. two batch cans are all preheated to 60 DEG C;
C. by terminal mixing tank preheating temperature to 60 DEG C;
D. by pouring can preheating temperature to 80 DEG C, coil die is put into the degassed process of pouring can;
E. by filler drying more than 4 hours in 100 DEG C of baking ovens;
(4) batch mixing:
A. the epoxy resin weighed is poured in a mixing tank, curing agent is poured in No. two mixing tanks, then stir 5 minutes, then pressurize 10 minutes under vacuum 300Pa condition;
B. 170 parts of fillers are added in a mixing tank, 160 parts of fillers are added in No. two mixing tanks, stir after 2 minutes respectively, all pressurizes 40 minutes under vacuum 300Pa condition;
C. taken out from a mixing tank and No. two mixing tanks respectively by the material after process and put into terminal mixing tank, mix under vacuum 500Pa environment, after degassed 30 minutes, bubble-free in material to be mixed, can pour into a mould;
(5) pour into a mould: slowly pour in the mould of 75 DEG C by the compound through fully process, after casting complete, coil continues maintenance 10 minutes under vacuo, pushes curing oven subsequently;
Solidification: first curing temperature is 85 DEG C, keeps 6 hours, promotes temperature to 100 DEG C afterwards, keeps 3 hours, the then demoulding; Post RDBMS temperature is 125 DEG C, and keep 10 hours, after having solidified, instrument transformer should slowly cool to room temperature in an oven.
Embodiment two:
A kind of macrostructure outdoor voltage transformer, its component comprises epoxy resin, curing agent, flexibilizer and filler, and the quality proportioning of described each component is: epoxy resin 100 parts, 90 parts, curing agent, flexibilizer 4 parts, filler 340 parts.
A casting process for macrostructure outdoor voltage transformer, comprises the following steps:
(1) prepare:
A. by die-filling mould preliminary drying more than 3 hours in 80 DEG C of baking ovens;
B. a mixing tank and No. two batch cans are all preheated to 60 DEG C;
C. by terminal mixing tank preheating temperature to 60 DEG C;
D. by pouring can preheating temperature to 80 DEG C, coil die is put into the degassed process of pouring can;
E. by filler drying more than 4 hours in 110 DEG C of baking ovens;
(6) batch mixing:
A. the epoxy resin weighed is poured in a mixing tank, curing agent is poured in No. two mixing tanks, then stir 8 minutes, then pressurize 12 minutes under vacuum 400Pa condition;
B. 175 parts of fillers are added in a mixing tank, 165 parts of fillers are added in No. two mixing tanks, stir after 2 minutes respectively, pressurize 50 minutes under vacuum 400Pa condition;
C. taken out from a mixing tank and No. two mixing tanks respectively by the material after process and put into terminal mixing tank, mix under vacuum 800Pa environment, after degassed 35 minutes, bubble-free in material to be mixed, can pour into a mould;
(7) pour into a mould: slowly pour in the mould of 78 DEG C by the compound through fully process, after casting complete, coil continues maintenance 13 minutes under vacuo, pushes curing oven subsequently;
Solidification: first curing temperature is 85 DEG C, keeps 7 hours, promotes temperature to 100 DEG C afterwards, keeps 3 hours, the then demoulding; Post RDBMS temperature is 125 DEG C, and keep 10 hours, after having solidified, instrument transformer should slowly cool to room temperature in an oven.
Embodiment three:
A kind of macrostructure outdoor voltage transformer, its component comprises epoxy resin, curing agent, flexibilizer and filler, and the quality proportioning of described each component is: epoxy resin 100 parts, 90 parts, curing agent, flexibilizer 4 parts, filler 350 parts.
A casting process for macrostructure outdoor voltage transformer, comprises the following steps:
(1) prepare:
A. by die-filling mould preliminary drying more than 3 hours in 80 DEG C of baking ovens;
B. a mixing tank and No. two batch cans are all preheated to 60 DEG C;
C. by terminal mixing tank preheating temperature to 60 DEG C;
D. by pouring can preheating temperature to 80 DEG C, coil die is put into the degassed process of pouring can;
E. by filler drying more than 4 hours in 110 DEG C of baking ovens;
(8) batch mixing:
A. the epoxy resin weighed is poured in a mixing tank, curing agent is poured in No. two mixing tanks, then stir 10 minutes, then pressurize 15 minutes under vacuum 500Pa condition;
B. 180 parts of fillers are added in a mixing tank, 170 parts of fillers are added in No. two mixing tanks, stir after 3 minutes respectively, pressurize 60 minutes under vacuum 500Pa condition;
C. taken out from a mixing tank and No. two mixing tanks respectively by the material after process and put into terminal mixing tank, mix under vacuum 1000Pa environment, after degassed 40 minutes, bubble-free in material to be mixed, can pour into a mould;
(9) pour into a mould: slowly pour in the mould of 80 DEG C by the compound through fully process, after casting complete, coil continues maintenance 15 minutes under vacuo, pushes curing oven subsequently;
Solidification: first curing temperature is 85 DEG C, keeps 8 hours, promotes temperature to 100 DEG C afterwards, keeps 3 hours, the then demoulding; Post RDBMS temperature is 125 DEG C, and keep 10 hours, after having solidified, instrument transformer should slowly cool to room temperature in an oven.
Table 1 machinery of the present invention and physical property
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (2)
1. a macrostructure outdoor voltage transformer, its component comprises epoxy resin, curing agent, flexibilizer and filler, it is characterized in that: the quality proportioning of described each component is: epoxy resin 100 parts, 90 parts, curing agent, flexibilizer 4 parts, filler 330 parts to 350 parts.
2. the casting process of a kind of macrostructure outdoor voltage transformer according to claim 1, is characterized in that: comprise the following steps:
(1) prepare:
A. by die-filling mould preliminary drying more than 3 hours in 80 DEG C of baking ovens;
B. a mixing tank and No. two batch cans are all preheated to 60 DEG C;
C. by terminal mixing tank preheating temperature to 60 DEG C;
D. by pouring can preheating temperature to 80 DEG C, coil die is put into the degassed process of pouring can;
E. by filler drying more than 4 hours in 100 DEG C ~ 110 DEG C baking ovens;
(2) batch mixing:
A. the epoxy resin weighed is poured in a mixing tank, curing agent is poured in No. two mixing tanks, then stir 5 ~ 10 minutes, then pressurize 10 ~ 15 minutes under vacuum 300 ~ 500Pa condition;
B. 170 ~ 180 parts of fillers are added in a mixing tank, 160 ~ 170 parts of fillers are added in No. two mixing tanks, after stirring 2 ~ 3 minutes respectively, pressurize 40 ~ 60 minutes under vacuum 300 ~ 500Pa condition;
C. taken out from a mixing tank and No. two mixing tanks respectively by the material after process and put into terminal mixing tank, mix under vacuum 500 ~ 1000Pa environment, after degassed 30 ~ 40 minutes, bubble-free in material to be mixed, can pour into a mould;
(3) pour into a mould: slowly pour in the mould of 75 ~ 80 DEG C by the compound through fully process, after casting complete, coil continues maintenance 10 ~ 15 minutes under vacuo, pushes curing oven subsequently;
(4) solidify: first curing temperature is 85 DEG C, keeps 6 ~ 8 hours, promote temperature to 100 DEG C afterwards, keep 3 hours, the then demoulding; Post RDBMS temperature is 125 DEG C, and keep 10 hours, after having solidified, instrument transformer should slowly cool to room temperature in an oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510582832.3A CN105261442A (en) | 2015-09-12 | 2015-09-12 | Outdoor voltage transformer with large structure and casting technology of outdoor voltage transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510582832.3A CN105261442A (en) | 2015-09-12 | 2015-09-12 | Outdoor voltage transformer with large structure and casting technology of outdoor voltage transformer |
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| CN105261442A true CN105261442A (en) | 2016-01-20 |
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| CN201510582832.3A Pending CN105261442A (en) | 2015-09-12 | 2015-09-12 | Outdoor voltage transformer with large structure and casting technology of outdoor voltage transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106626181A (en) * | 2016-11-30 | 2017-05-10 | 国网重庆市电力公司电力科学研究院 | Pouring technology for all-fiber optical current transformer |
| CN106816306A (en) * | 2017-03-24 | 2017-06-09 | 广州供电局有限公司 | The pouring technology of reactor winding |
| CN107068377A (en) * | 2017-05-12 | 2017-08-18 | 江苏恒炫电气有限公司 | A kind of transformer application process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102936394A (en) * | 2012-09-05 | 2013-02-20 | 太仓市联安新型绝缘材料制造厂 | Dry outdoor type electric power complete equipment insulation casting material and preparation method thereof |
| WO2013123648A1 (en) * | 2012-02-22 | 2013-08-29 | Abb Technology Ltd. | Curable epoxy composition with milled glass fiber |
| CN102827566B (en) * | 2012-09-19 | 2014-03-05 | 三友（天津）高分子技术有限公司 | Single-component high/low-temperature-resistant epoxy resin composition |
| CN103963200A (en) * | 2014-04-23 | 2014-08-06 | 南通东源互感器制造有限公司 | Pouring method for current transformer |
-
2015
- 2015-09-12 CN CN201510582832.3A patent/CN105261442A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013123648A1 (en) * | 2012-02-22 | 2013-08-29 | Abb Technology Ltd. | Curable epoxy composition with milled glass fiber |
| CN102936394A (en) * | 2012-09-05 | 2013-02-20 | 太仓市联安新型绝缘材料制造厂 | Dry outdoor type electric power complete equipment insulation casting material and preparation method thereof |
| CN102827566B (en) * | 2012-09-19 | 2014-03-05 | 三友（天津）高分子技术有限公司 | Single-component high/low-temperature-resistant epoxy resin composition |
| CN103963200A (en) * | 2014-04-23 | 2014-08-06 | 南通东源互感器制造有限公司 | Pouring method for current transformer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106626181A (en) * | 2016-11-30 | 2017-05-10 | 国网重庆市电力公司电力科学研究院 | Pouring technology for all-fiber optical current transformer |
| CN106816306A (en) * | 2017-03-24 | 2017-06-09 | 广州供电局有限公司 | The pouring technology of reactor winding |
| CN107068377A (en) * | 2017-05-12 | 2017-08-18 | 江苏恒炫电气有限公司 | A kind of transformer application process |
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Application publication date: 20160120 |
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