CN110364831A - 一种钢芯铝绞线全张力嵌铝压接结构 - Google Patents
一种钢芯铝绞线全张力嵌铝压接结构 Download PDFInfo
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Abstract
本发明公开了一种钢芯铝绞线全张力嵌铝压接结构，包括铝接续管、钢接续管、钢芯接续嵌铝管、内嵌层铝管、外嵌层铝管和导线定性环，钢芯接续嵌铝管套接在两对接的钢绞线上，钢接续管套接在钢芯接续嵌铝管外部，压接钢接续管套使得钢芯接续嵌铝管紧密贴合钢绞线；将内嵌层铝管置于对接每端钢芯铝绞线的钢绞线和内铝绞线层之间，对接每端钢芯铝绞线外套接有外嵌层铝管，铝接续管套接在两对接的钢芯铝绞线上的两外嵌层铝管上，压接铝接续管两端使得内嵌层铝管紧密贴合钢绞线和内铝绞线层、外嵌层铝管紧密贴合钢芯铝绞线和铝接续管。本发明避免钢芯铝绞线压伤、欠压、松股，连接可靠性好，易制作，压接质量更高，免无损检测，降低劳动强度和工程费用。
Description
技术领域
本发明属于钢芯铝绞线对接接头技术领域，具体涉及一种钢芯铝绞线全张力嵌铝压接结构。
背景技术
现有钢芯铝绞线全张力接续管主要由钢压接管和铝压接管组成，压接时，先将铝绞线剥削一段露出钢绞线，用钢压接管将钢绞线压接，然后再用铝合金压接管将铝合金接续管、铝绞线、钢绞线压接在一起。这种传统的压接方法容易出现两方面问题：
（1）钢芯接续管压接对钢芯的损伤。
在传统的输变电工程架空导线的接续工艺中，钢芯铝绞线及地线的镀锌钢绞线（或铝包钢绞线）接头均用钢管直接套住钢绞线液压连接，如果钢管与钢绞线硬度不匹配、压接模具尺寸不合理、压接压力不足，容易出现欠压、松股、过压、钢丝表面损伤等缺陷，导致接头的握着力不满足标准要求。在造成钢芯铝绞线及地线的钢绞线压接缺陷因素中，钢管与钢绞线硬度不匹配是最不能避免的，在铝包钢绞线的生产工艺中，冷拉钢丝穿过液铝镀铝，相当做了一次回火，冷拉钢丝硬度降低，导致钢绞线硬度比钢管硬度低，压接时钢管内壁咬伤钢绞线钢丝，导致接头的握着力降低。
（2）铝接续管压接质量难以保证。
传统的输变电工程架空导线的接续工艺中，由于钢芯屈服强度远大于铝的屈服强度，铝绞线和铝合金接续管在压接处产生塑性变形硬化，单根铝绞线截面变细。
夏天，当温度增大时，钢芯向外膨胀挤压铝绞线，铝绞线和铝合金接续管也向内向外膨胀继续挤压钢芯，由于钢芯屈服强度远大于铝的屈服强度，铝绞线压接处继续产生塑性变形硬化、单根铝绞线截面继续变细。
冬天，当温度降低时，由于钢芯处于弹性范围内，钢芯截面变细，钢芯施加给铝绞线的压力降低，铝绞线的截面也收缩，但由于铝绞线已经发生屈服硬化，铝绞线的截面并未因为压力的降低而膨胀，这就导致铝绞线之间产生缝隙。
雨水、大气、污物、腐蚀介质渗透压接头的铝绞线之间缝隙，使铝绞线表面产生氧化，生成三氧化二铝，导致钢芯铝绞线接续管压接处接触电阻增大发热，最终失效。
为了解决传统的压接方法容易出现的钢芯的损伤和铝接续管压接质量不稳定等问题，有必要设计一种新型的钢芯铝绞线全张力嵌铝压接工艺，使钢芯铝绞线对接压接更容易实施，压接质量更高，压接头可以免无损检测，减低劳动强度和工程费用。
发明内容
本发明要解决的技术问题是：提供一种钢芯铝绞线全张力嵌铝压接结构，以解决现有技术中存在的问题。
本发明采取的技术方案为：一种钢芯铝绞线全张力嵌铝压接结构，包括铝接续管、钢接续管、钢芯接续嵌铝管、内嵌层铝管、外嵌层铝管和导线定性环，钢芯接续嵌铝管套接在两对接的钢绞线上，钢接续管套接在钢芯接续嵌铝管外部，压接钢接续管套使得钢芯接续嵌铝管紧密贴合钢绞线形成钢绞线压接接头；将内嵌层铝管置于对接每端钢芯铝绞线的钢绞线和内铝绞线层之间，对接每端钢芯铝绞线外套接有外嵌层铝管，铝接续管套接在两对接的钢芯铝绞线上的两外嵌层铝管上，压接铝接续管两端使得内嵌层铝管紧密贴合钢绞线和内铝绞线层、外嵌层铝管紧密贴合钢芯铝绞线和铝接续管，形成铝绞线压接接头，钢绞线压接接头位于铝接续管内，钢绞线压接接头和铝绞线压接接头共同组成钢芯铝绞线全张力嵌铝压接接头。
优选的，上述钢接续管和钢芯接续嵌铝管长度相等，均为两个钢绞线节距。
本发明的有益效果：与现有技术相比，本发明在对接的钢绞线套接钢接续管间增加钢芯接续嵌铝管，钢绞线和铝绞线层间增加一层内嵌层铝管、铝接续管和钢芯铝绞线之间增加一层外嵌层铝管，利用铝管的高塑形和高静摩擦系数，避免在钢绞线的钢丝和铝绞线层的铝丝以及钢接续管和钢芯铝绞线压接时出现钢芯铝绞线被压伤、欠压、松股现象，同时又满足接头的握着力要求，使钢芯铝绞线压接更容易实施，压接质量更高，压接头可以免无损检测，减低劳动强度和工程费用。
附图说明
图1为铝接续管结构示意图，图中两端为压接段，中部为未压接段；
图2为铝接续管压接段截面结构示意图；
图3为铝接续管未压接段截面结构示意图；
图4为内嵌层铝管结构示意图；
图5为内嵌层铝管包裹内嵌层段铝管截面结构示意图；
图6为内嵌层铝管未包裹内嵌层铝管段截面结构示意图；
图7为导线定性环结构示意图；
图8为导线定性环左视结构示意图；
图9为内嵌层铝管结构示意图；
图10为内嵌层铝管左视结构示意图；
图11为钢芯铝绞线对接连接处结构示意图；
图12为图11中的1-1截面示意图；
图13为图11中的2-2截面示意图；
图14为图11中的3-3截面示意图；
图15为图11中的4-4截面示意图。
具体实施方式
下面结合附图及具体的实施例对本发明进行进一步介绍。
实施例1：如图1-15所示，一种钢芯铝绞线全张力嵌铝压接结构，包括铝接续管1、钢接续管2、钢芯接续嵌铝管3、内嵌层铝管4、外嵌层铝管5和导线定性环6，钢芯接续嵌铝管3套接在两对接的钢绞线7上，钢接续管套2接在钢芯接续嵌铝管3外部，压接钢接续管套2使得钢芯接续嵌铝管3紧密贴合钢绞线3形成钢绞线压接接头；将内嵌层铝管4置于对接每端钢芯铝绞线的钢绞线7和内铝绞线层8之间，对接每端钢芯铝绞线外套接有外嵌层铝管5，铝接续管1套接在两对接的钢芯铝绞线上的两外嵌层铝管5上，压接铝接续管1两端使得内嵌层铝管4紧密贴合钢绞线7和内铝绞线层8、外嵌层铝管5紧密贴合钢芯铝绞线和铝接续管1，形成铝绞线压接接头，钢绞线压接接头位于铝接续管内，钢绞线压接接头和铝绞线压接接头共同组成钢芯铝绞线全张力嵌铝压接接头。
铝接续管1两端为压接段9，压接段9压接后呈类六边形，外嵌层铝管5内孔为台阶孔，包裹内嵌层铝管段内孔直径小于未包裹内嵌层铝管段内孔直径，便于快速安装。
优选的，上述钢接续管2和钢芯接续嵌铝管3长度相等，均为两个钢绞线节距。
内嵌层铝管4、外嵌层铝管5分别提供压接部分钢丝、铝丝嵌入填充材料，利用铝合金的高静摩擦系数将接头压力转变为抗张力，提高接头的握着力。
实施例2：一种钢芯铝绞线全张力嵌铝压接方法：该方法包括以下步骤：
1）将对接的两端钢芯铝绞线的铝绞线剖除，每端剖除段长度=钢接续管长度/2+20mm；
2）将钢芯铝绞线两接头拉直至10米，将钢芯铝绞线一端接头套入铝接续管，并将铝接续管移到不影响下一步工序位置；
3）将一端钢芯铝绞线穿入外嵌层铝管中，外嵌层铝管大内径端指向接头处，将外嵌层铝管移动到不影响下一步工序位置；
4）将导线定形环套入对接的钢芯铝绞线上，将导线定形环固定在钢芯铝绞线铝绞层接续端内嵌层铝管长度+20mm处；
5）松开钢芯铝绞线接续端铝绞层，将内嵌层铝管套入钢芯铝绞线的钢绞线（钢绞线芯），并将内嵌层铝管全部插入内层铝绞线和钢绞线（钢绞线芯）之间；
6）按钢芯铝绞线各铝绞层绞向修复铝绞线，将外嵌层铝管移动到钢芯铝绞线铝绞层接续端，使导线定形环、修复铝绞线、内嵌层铝管、钢芯全部套进外嵌层铝管中；
7）重复步骤3）-6），完成另一端对接的钢芯铝绞线上内嵌层铝管4、外嵌层铝管5和导线定性环6的组装，然后对接两端钢芯铝绞线；
8）将钢芯接续嵌铝管嵌入到钢接续管内；
9）将两对接的钢芯铝钢绞线从钢芯接续嵌铝管两端插入，确保两钢芯铝钢绞线插入深度相等；
10）采用压接模具压接钢接续管，使得钢芯接续嵌铝管紧密啮合钢芯铝绞线表面且填充钢接续管和钢芯铝绞线间间隙形成钢芯压接接头；
11）将铝接续管移动套装在钢芯铝绞线两接续头的外嵌层铝管外；
12）采用压接模具压接铝接续管两端压接端，使得两接续端外嵌层铝管紧密啮合钢芯铝绞线和铝接续管，内嵌层铝管紧密啮合内层铝绞线和钢绞线，形成铝绞线压接接头，钢芯压接接头和铝绞线压接接头组成全张力嵌铝压接接头。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内，因此，本发明的保护范围应以所述权利要求的保护范围为准。
Claims (2)
1.一种钢芯铝绞线全张力嵌铝压接结构，其特征在于：包括铝接续管（1）、钢接续管（2）、钢芯接续嵌铝管（3）、内嵌层铝管（4）、外嵌层铝管（5）和导线定性环（6），钢芯接续嵌铝管（3）套接在两对接的钢绞线（7）上，钢接续管套（2）接在钢芯接续嵌铝管（3）外部，压接钢接续管套（2）使得钢芯接续嵌铝管（3）紧密贴合钢绞线（3）形成钢绞线压接接头；将内嵌层铝管（4）置于对接每端钢芯铝绞线的钢绞线（7）和内铝绞线层（8）之间，对接每端钢芯铝绞线外套接有外嵌层铝管（5），铝接续管（1）套接在两对接的钢芯铝绞线上的两外嵌层铝管（5）上，压接铝接续管（1）两端使得内嵌层铝管（4）紧密贴合钢绞线（7）和内铝绞线层（8）、外嵌层铝管（5）紧密贴合钢芯铝绞线和铝接续管（1），形成铝绞线压接接头，钢绞线压接接头位于铝接续管内。
2.根据权利要求1所述的一种钢芯铝绞线全张力嵌铝压接结构，其特征在于：钢接续管（2）和钢芯接续嵌铝管（3）长度相等，均为两个钢绞线节距。
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