CN101673588A - Single-side self-bonding acetal enameled kufil-clad transposed semi-hard conductor without paper insulation - Google Patents
Single-side self-bonding acetal enameled kufil-clad transposed semi-hard conductor without paper insulation Download PDFInfo
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- CN101673588A CN101673588A CN200910233911A CN200910233911A CN101673588A CN 101673588 A CN101673588 A CN 101673588A CN 200910233911 A CN200910233911 A CN 200910233911A CN 200910233911 A CN200910233911 A CN 200910233911A CN 101673588 A CN101673588 A CN 101673588A
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Abstract
本发明提供了无纸绝缘单面自粘缩醛漆包铜银合金换位半硬导线。其外形尺寸小且基本一致，利用其绕制的变压器线圈能有效的提高了绕组空间利用率，减少了变压器体积。其包括换位线芯，所述换位线芯外部绕包聚酯网带，所述换位线芯包括数根铜银合金导线，所述铜银合金导线包括铜银合金导体，所述铜银合金导体外部涂覆有缩醛漆，所述缩醛漆外部涂有自粘漆，其特征在于：所述自粘漆涂于所述铜银合金导体宽面。
The invention provides a non-paper insulating single-sided self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wire. Its outer dimension is small and basically consistent, and the transformer coil wound by it can effectively improve the space utilization rate of the winding and reduce the volume of the transformer. It includes a transposition wire core, and the polyester mesh belt is wrapped around the outside of the transposition core, and the transposition core includes several copper-silver alloy wires, and the copper-silver alloy wires include copper-silver alloy conductors, and the copper-silver alloy wires The exterior of the silver alloy conductor is coated with acetal varnish, and the exterior of the acetal varnish is coated with self-adhesive varnish, which is characterized in that the self-adhesive varnish is coated on the wide surface of the copper-silver alloy conductor.
Description
(一)技术领域 (1) Technical field
本发明涉及电力变压器用换位导线技术领域，具体为无纸绝缘单面自粘缩醛漆包铜银合金换位半硬导线。The invention relates to the technical field of transposition wires for power transformers, in particular to paperless insulating single-sided self-adhesive acetal enamelled copper-silver alloy transposition semi-rigid wires.
(二)背景技术 (2) Background technology
目前电力变压器用的换位导线主要有纸绝缘自粘缩醛漆包铜换位半硬导线，其耐温指数最高达到120，σ0.2≥120N/mm2，最高不超过260N/mm2，通过干燥处理后线圈粘结成一个整体，线圈的抗冲击能力高。在电力变压器正常运行情况下，变压器的环境温度大约为98℃～105℃，其在长时间高温烧烤下，半硬屈服强度σ0.2降到100N/mm2以下并无法再达到原来设计的最小屈服强度，完全依靠线圈环氧自粘形成的线圈整体的强度，远远不能满足高电压大容量变压器对线圈耐冲击能力的要求；且绝缘纸绕包层数多、绕包不紧密时，会产生局部油囊现象，严重影响线圈的散热效果。因此，现在电力变压器用换位导线逐渐用无纸绝缘自粘缩醛漆包铜银合金换位半硬导线来代替纸绝缘自粘缩醛漆包铜换位半硬导线，其导体由铜银合金制成，铜银合金导体与无氧铜相比，其再结晶温度和高温软化温度要高80℃～100℃左右，且具有良好的导电导热，可以有效提高线圈的散热效果，从而提高线圈工作温度；其采用聚酯网带作为绝缘材料，该聚酯网带采用聚酯绳和尼龙纤维经过编制而成，具有热收缩性能和机械强度，采用该聚酯网带绕包绝缘厚度小，绕制紧密，可以根据线圈的绝缘要求，在换位导线生产过程中进行单面或双面绝缘增强，既不影响散热效果，又可以提高线圈的绝缘性能。但是，由于无纸绝缘自粘缩醛漆包铜银合金换位半硬导线一般四面即两边的自粘漆膜厚度约为0.06mm，见附图1，其绕制线圈后，线圈轴向和幅向尺寸都比理论值大10mm～30mm，增加了变压器的体积，增加了变压器的成本；且无纸绝缘自粘缩醛漆包铜银合金换位半硬导线在105℃～120℃进行干燥过程中，存在于换位导线线芯间的自粘漆层会出现软化现象，轴向和幅向处于一定的压力作用下，自粘漆层变薄，多余的自粘层向换位导线的空隙间流淌，会形成漆瘤，产生局放现象，影响变压器的运行质量；而自粘层过多，会阻碍导体的热量散失，影响了变压器油对线圈的冷却效果，无法最大幅度降低线圈的温升。At present , the transposition conductors used in power transformers mainly include paper -insulated self-adhesive acetal enamelled copper transposition semi-rigid conductors . After drying, the coil is bonded into a whole, and the impact resistance of the coil is high. Under the normal operation of the power transformer, the ambient temperature of the transformer is about 98 ℃ ~ 105 ℃. Under long-term high-temperature roasting, the semi-hard yield strength σ 0.2 drops below 100N/mm 2 and can no longer reach the minimum yield of the original design. The strength depends entirely on the overall strength of the coil formed by the epoxy self-adhesion of the coil, which is far from meeting the requirements of high-voltage and large-capacity transformers for the impact resistance of the coil; and when there are many layers of insulating paper and the winding is not tight, it will cause Partial oil bag phenomenon seriously affects the heat dissipation effect of the coil. Therefore, the transposition wires used in power transformers are gradually replaced by paper-insulated self-adhesive acetal enamelled copper-transposed semi-rigid wires with paperless insulated self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wires. Compared with oxygen-free copper, the copper-silver alloy conductor has a recrystallization temperature and high-temperature softening temperature about 80°C to 100°C higher, and has good electrical and thermal conductivity, which can effectively improve the heat dissipation effect of the coil, thereby improving the coil temperature. Working temperature; it uses polyester mesh belt as the insulating material, the polyester mesh belt is made of polyester rope and nylon fiber, which has thermal shrinkage performance and mechanical strength, and the insulation thickness of the polyester mesh belt is small, The winding is tight, and according to the insulation requirements of the coil, single-sided or double-sided insulation can be enhanced during the production process of the transposed wire, which does not affect the heat dissipation effect and can improve the insulation performance of the coil. However, due to the non-paper insulating self-adhesive acetal enamelled copper-silver alloy transposition semi-rigid wire, the thickness of the self-adhesive paint film on the four sides is about 0.06mm. See Figure 1. After the coil is wound, the coil axial and The width dimension is 10mm~30mm larger than the theoretical value, which increases the volume of the transformer and increases the cost of the transformer; and the non-paper insulated self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wire is dried at 105°C~120°C During the process, the self-adhesive paint layer between the cores of the transposed wires will soften, and under certain pressure in the axial and width directions, the self-adhesive paint layer will become thinner, and the excess self-adhesive layer will flow toward the transposed wires. Flowing between the gaps will form varnish lumps, produce partial discharge, and affect the operation quality of the transformer; and too much self-adhesive layer will hinder the heat loss of the conductor, affect the cooling effect of the transformer oil on the coil, and cannot reduce the coil temperature to a large extent. temperature rise.
(三)发明内容 (3) Contents of the invention
针对上述问题，本发明提供了无纸绝缘单面自粘缩醛漆包铜银合金换位半硬导线，其外形尺寸小且基本一致，利用其绕制的变压器线圈能有效的提高了绕组空间利用率，减少了变压器体积。In view of the above problems, the present invention provides paperless insulated single-sided self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wire, which has small and basically consistent dimensions, and the transformer coil wound by it can effectively increase the winding space. The utilization rate reduces the volume of the transformer.
其技术方案是这样的，其包括换位线芯，所述换位线芯外部绕包聚酯网带，所述换位线芯包括数根铜银合金导线，所述铜银合金导线包括铜银合金导体，所述铜银合金导体外部涂覆有缩醛漆，所述缩醛漆外部涂有自粘漆，其特征在于：所述自粘漆涂于所述铜银合金导体宽面。Its technical solution is as follows: it includes a transposition wire core, and the polyester mesh belt is wrapped around the exterior of the transposition core, and the transposition core includes several copper-silver alloy wires, and the copper-silver alloy wires include copper A silver alloy conductor, the copper-silver alloy conductor is coated with acetal varnish, and the acetal varnish is coated with self-adhesive varnish, and the feature is that the self-adhesive varnish is coated on the wide surface of the copper-silver alloy conductor.
其进一步特征在于：所述自粘漆的宽度为导线宽面的宽度的1/3～2/3；所述自粘漆厚度为0.03mm～0.05mm。It is further characterized in that: the width of the self-adhesive paint is 1/3-2/3 of the width of the wide surface of the wire; the thickness of the self-adhesive paint is 0.03mm-0.05mm.
与无纸绝缘自粘缩醛漆包铜银合金换位半硬导线相比，本发明的有益效果在于：其减少和去除多余的自粘层，使外形尺寸减小0.10mm～0.40mm，外形尺寸基本一致，该产品绕制的变压器线圈，有效的提高了绕组空间利用率，减少了变压器体积；其绕制的线圈经过正常热处理，线圈不会产生自粘层外溢形成的漆瘤和尖角的缺陷，减少了局放现象，提高了变压器油的散热效果，保证变压器的正常运行寿命和质量减小；另外漆膜厚度的减少，也提高了该产品本身的散热效果，从而达到提高线圈散热效果的目的，降低了线圈的温升，降低了环流和涡流损耗，允许变压器在80℃～150℃高温长时间超负荷运行，高温长期运行机械性能不下降。Compared with paperless insulating self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wires, the invention has the beneficial effects of reducing and removing redundant self-adhesive layers, reducing the overall size by 0.10 mm to 0.40 mm, and the appearance The size is basically the same. The transformer coil wound by this product effectively improves the utilization rate of the winding space and reduces the volume of the transformer; the coil wound by it undergoes normal heat treatment, and the coil will not produce varnish and sharp corners formed by the overflow of the self-adhesive layer The defect of partial discharge reduces the phenomenon of partial discharge, improves the heat dissipation effect of transformer oil, and ensures the normal operation life and quality of the transformer. In addition, the reduction of paint film thickness also improves the heat dissipation effect of the product itself, so as to improve the heat dissipation of the coil The purpose of the effect is to reduce the temperature rise of the coil, reduce the circulation and eddy current loss, allow the transformer to operate at a high temperature of 80 ° C to 150 ° C for a long time, and the mechanical properties of the high temperature long-term operation will not decrease.
(四)附图说明 (4) Description of drawings
图1为无纸绝缘自粘缩醛漆包铜银合金换位半硬导线结构示意图；Fig. 1 is a schematic diagram of the paperless insulating self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wire structure;
图2为本发明无纸绝缘单面自粘缩醛漆包铜银合金换位半硬导线结构示意图。Fig. 2 is a schematic diagram of the structure of the non-paper insulated single-sided self-adhesive acetal enamelled copper-silver alloy transposed semi-rigid wire of the present invention.
(五)具体实施方式 (5) Specific implementation methods
见图2，本发明包括换位线芯，换位线芯外部绕包聚酯网带4，换位线芯包括数根铜银合金导线，铜银合金导线包括铜银合金导体1，铜银合金导体1外部涂覆有缩醛漆2，缩醛漆2外部涂有自粘漆3；其中自粘漆3涂于铜银合金导体1宽面；自粘漆的宽度为铜银合金导线宽面的宽度的1/3～2/3；自粘漆厚度为0.03mm～0.05mm。As shown in Fig. 2, the present invention includes a transposition wire core, the exterior of the transposition wire core is wrapped with a
本发明的无纸绝缘单面自粘缩醛漆包铜银合金换位半硬导线，通过上引法连铸工艺生产铜银合金铜杆，经过漆包、换位加工并采用聚酯网带绕包，可以根据绝缘的要求，在换位导线单面或双面增强绝缘，而形成无纸绝缘单面自粘缩醛漆包铜银合金换位半硬导线，该产品既有优良的电气性能、机械性能，还具有优良的热粘合强度、热收缩性能和散热效果好的特点，并且采用在线高压漆膜连续测量仪通过直流电压测试耐压性能，保证漆膜不会受损；介质损耗测试仪通过电容原理，测试漆膜的固化程度，保证单面自粘性缩醛漆包铜扁线的质量稳定性和一致性。The paperless insulating single-sided self-adhesive acetal enamelled copper-silver alloy transposition semi-rigid wire of the present invention produces copper-silver alloy copper rods through the up-drawing method continuous casting process, and uses polyester mesh belts after enamelling and transposition processing Wrapping, according to the insulation requirements, the insulation can be strengthened on one side or both sides of the transposed wire to form a self-adhesive acetal enameled copper-silver alloy transposed semi-rigid wire on one side without paper insulation. This product has both excellent electrical properties Performance, mechanical properties, and also has excellent thermal bonding strength, thermal shrinkage performance and good heat dissipation effect, and the online high-voltage paint film continuous measuring instrument is used to test the withstand voltage performance through DC voltage to ensure that the paint film will not be damaged; medium The loss tester uses the principle of capacitance to test the curing degree of the paint film to ensure the quality stability and consistency of the single-sided self-adhesive acetal enamelled flat copper wire.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826381A (en) * | 2010-03-29 | 2010-09-08 | 无锡锡洲电磁线有限公司 | Wire semirigid device |
| CN102376387A (en) * | 2010-08-16 | 2012-03-14 | 江苏八达线缆有限公司 | Polyester net wrapped transposition wire |
| WO2012113851A1 (en) * | 2011-02-24 | 2012-08-30 | Asta Elektrodraht Gmbh | Continuously transposed conductor |
| CN103247377A (en) * | 2013-05-22 | 2013-08-14 | 江苏句容联合铜材有限公司 | Modified parallel compound belt shielding transposed conductor |
| CN103280257A (en) * | 2013-05-22 | 2013-09-04 | 江苏句容联合铜材有限公司 | Modified parallel composite transposed conductor and processing method thereof |
| CN103594155A (en) * | 2013-11-18 | 2014-02-19 | 保定天威线材制造有限公司 | Local self-adhesive paint layer low-self-adhesive-layer transposition wire for transformer and production method |
| US9153359B2 (en) | 2011-02-24 | 2015-10-06 | Asta Elektrodraht Gmbh | Continuously transposed conductor |
| CN108831596A (en) * | 2018-07-26 | 2018-11-16 | 江苏中容电气有限公司 | A kind of EHV transformer high heat resistance insulation transposed conductor |
| CN110021474A (en) * | 2017-12-28 | 2019-07-16 | 株式会社关电 | Hollow coil and its manufacturing method |
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2009
- 2009-09-28 CN CN200910233911A patent/CN101673588A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826381A (en) * | 2010-03-29 | 2010-09-08 | 无锡锡洲电磁线有限公司 | Wire semirigid device |
| CN102376387A (en) * | 2010-08-16 | 2012-03-14 | 江苏八达线缆有限公司 | Polyester net wrapped transposition wire |
| WO2012113851A1 (en) * | 2011-02-24 | 2012-08-30 | Asta Elektrodraht Gmbh | Continuously transposed conductor |
| KR20140024286A (en) * | 2011-02-24 | 2014-02-28 | 아스타 엘렉트로드라트 게엠베하 | Continuously trasnposed conductor |
| US9153359B2 (en) | 2011-02-24 | 2015-10-06 | Asta Elektrodraht Gmbh | Continuously transposed conductor |
| KR102046187B1 (en) * | 2011-02-24 | 2019-11-18 | 아스타 엘렉트로드라트 게엠베하 | Continuously trasnposed conductor |
| CN103247377A (en) * | 2013-05-22 | 2013-08-14 | 江苏句容联合铜材有限公司 | Modified parallel compound belt shielding transposed conductor |
| CN103280257A (en) * | 2013-05-22 | 2013-09-04 | 江苏句容联合铜材有限公司 | Modified parallel composite transposed conductor and processing method thereof |
| CN103594155A (en) * | 2013-11-18 | 2014-02-19 | 保定天威线材制造有限公司 | Local self-adhesive paint layer low-self-adhesive-layer transposition wire for transformer and production method |
| CN110021474A (en) * | 2017-12-28 | 2019-07-16 | 株式会社关电 | Hollow coil and its manufacturing method |
| CN108831596A (en) * | 2018-07-26 | 2018-11-16 | 江苏中容电气有限公司 | A kind of EHV transformer high heat resistance insulation transposed conductor |
| CN108831596B (en) * | 2018-07-26 | 2024-01-19 | 江苏中容电气有限公司 | High heat-resistant insulation transposed conductor for ultrahigh voltage transformer |
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Application publication date: 20100317 |