CN108396649A - 一种桥梁用防护钢丝拉索 - Google Patents

一种桥梁用防护钢丝拉索 Download PDF

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CN108396649A
CN108396649A CN201810257790.XA CN201810257790A CN108396649A CN 108396649 A CN108396649 A CN 108396649A CN 201810257790 A CN201810257790 A CN 201810257790A CN 108396649 A CN108396649 A CN 108396649A
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董丽娜
王琨
张春娥
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Shandong Jiaotong University
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Abstract

本发明公开了一种桥梁用钢丝拉索，包括多根钢丝，所述的多根钢丝以密排六方方式排布，钢丝之间有发泡橡胶，发泡橡胶内有陶瓷增强颗粒，多根钢丝外包裹有刚性外壳和HDPE护套，刚性外壳和层HDPE护套之间设有弹性层；通过本发明，可以提高钢丝的使用寿命，提高了外面防护涂层与钢丝表面的结合强度，并能起到减震、缓冲的作用，降低了成本。

Description

一种桥梁用防护钢丝拉索
技术领域
本发明属于桥梁技术领域，尤其是涉及一种桥梁用防护钢丝拉索。
背景技术
斜拉桥又称斜张桥，是将主梁用许多拉索直接拉在桥塔上的一种桥梁，作为一种拉索体系，比梁式桥的跨越能力更大，是大跨度桥梁的最主要桥型。斜拉桥主要由索塔、主梁、斜拉索组成，由许多直接连接到塔上的钢缆吊起桥面，预应力钢丝拉索是桥梁结构中一种关键的受力部件，要求具有良好的强度、韧性、抗腐蚀性以及减震性能。目前预应力用桥梁钢丝拉索通常参照国家标准GB/T 18365-2001进行生产制造。但是目前通常采用的非金属保护层、化学保护层和金属保护层存在着易氢脆、易老化等问题，目前通用的钢丝拉索是由多根带有防护涂层的钢丝合到一起，外加护套组成。上述结构的钢索在储存、运输、施工过程中，相互之间会发生受力接触，造成涂层破损，同时钢丝之间缺少有效的缓冲防护，也容易造成磨损，使用寿命降低。
发明内容
为解决上述技术问题，本发明提供了一种桥梁用钢丝拉索。
本发明完整的技术方案包括：
一种桥梁用钢丝拉索，包括多根钢丝，所述的多根钢丝以密排六方方式排布，钢丝之间有发泡橡胶，发泡橡胶内有陶瓷增强颗粒，多根钢丝外包裹有刚性外壳和HDPE护套，刚性外壳和层HDPE护套之间设有弹性层；
所述的钢丝组分为：C：0.32～0.58％，Si：4.1～5.3％，Ti：1.1～1.3％，Ni：1.0～1.1％，Cr：0.1～0.8％，Mo：0.1～0.15％，Cu：0.04～0.06％，Mn：0.3～1.8％，P、S含量小于0.012％，余量为铁，以上组分为重量百分比。
在钢丝的间隙之间，以及钢丝和外壳之间的间隙填充发泡橡胶材料，发泡橡胶内有氧化铝颗粒，将橡胶混炼加入后在120160℃下进行两次硫化发泡。使发泡橡胶材料体积膨胀充满钢丝之间以及钢丝和外壳之间的间隙。
具体为选择100质量份的橡胶，优选为乙烯基硅橡胶或苯基硅橡胶；2030质量份的过氧化二异丙苯、8～20质量份的活性剂；5～8质量份的过氧化二叔丁基；2～7质量份的偶氮二甲酰胺；0～6质量份的甲基硅油，加入0.52质量份的氧化铝陶瓷粉。混炼后加入钢丝的间隙之间，以及钢丝和外壳之间的间隙，在120-160℃下进行两次硫化发泡。使发泡橡胶材料体积膨胀充满钢丝之间以及钢丝和外壳之间的间隙，并具有一定的支撑强度。
本发明相对于现有技术的优点在于：采用合理的钢丝组分，具有较高的耐腐蚀性能和较好的耐疲劳性能，提高了钢丝的使用寿命，在钢丝的间隙之间，以及钢丝和外壳之间的间隙填充发泡橡胶材料，并具有一定的支撑强度，起到了减震、缓冲的作用，降低了成本，采用先分丝后填充，一体发泡成型的工艺，显著提高了充填量，橡胶中的陶瓷颗粒起到了提高强度的作用，其使用量可根据发泡效果和强度要求选择。
附图说明
图1为本发明的结构示意图。
图中：1为钢丝，2为发泡橡胶，3为陶瓷增强颗粒，4为刚性外壳，5为弹性层，6为HDPE护套。
具体实施方式
下面结合附图和具体实施方式对本发明做进一步说明。
如图1所示，一种桥梁用钢丝拉索，包括多根光面钢丝1，所述的多根光面钢丝1以密排六方方式排布，钢丝之间有发泡橡胶2，发泡橡胶内有陶瓷增强颗粒3，多根钢丝外包裹有刚性外壳4和HDPE护套6，刚性外壳4和层HDPE护套6之间设有弹性层5。
选择钢丝，钢丝的组分为：C：0.32～0.58％，Si：4.1～5.3％，Ti：1.1～1.3％，Ni：1.0～1.1％，Cr：0.1～0.8％，Mo：0.1～0.15％，Cu：0.04～0.06％，Mn：0.3～1.8％，P、S含量小于0.012％，余量为铁，以上组分为重量百分比。将钢丝表面超声波清洗，并烘干处理。
随后将钢丝通过分丝板定位，按密排六方方式排布，在外面包敷刚性外壳4。在钢丝的间隙之间，以及钢丝和外壳之间的间隙填充发泡橡胶材料，具体为选择100质量份的橡胶，优选为乙烯基硅橡胶或苯基硅橡胶；2030质量份的过氧化二异丙苯、8～20质量份的活性剂；5～8质量份的过氧化二叔丁基；2～7质量份的偶氮二甲酰胺；0～6质量份的甲基硅油，加入0.52质量份的氧化铝陶瓷粉。混炼后加入钢丝的间隙之间，以及钢丝和外壳之间的间隙，在120-160℃下进行两次硫化发泡。使发泡橡胶材料体积膨胀充满钢丝之间以及钢丝和外壳之间的间隙，并具有一定的支撑强度，随后将多组钢丝聚合成型，随后在外层施加弹性层和外层护套。
此外，在本发明一个优选的实施方案中，光面钢丝外还具有刷涂或喷涂的颗粒层，具体为选择10-30％的高铝矾土粉和20-40％的锆英粉，5％的水溶性酚醛和余量的水形成混合物，将钢丝加热到150180℃后将混合物刷涂或喷涂到钢丝表面并继续加热，使钢丝形成凹凸的颗粒表面，为防护涂层的涂挂增加附着力。通过加热加压，使用喷枪将聚脲材料喷到形成凹凸的颗粒表面的钢丝表面，形成防护涂层。钢丝外具有刷涂或喷涂的颗粒层，解决了光面与涂层结合界面不牢固，在随后工序中涂层易损坏脱落的问题，提高了外面防护涂层与钢丝表面的结合强度，
以上所述，仅是本发明的较佳实施例，并非对本发明作任何限制，凡是根据本发明技术实质对以上实施例所作的任何简单修改、变更以及等效结构变化，均仍属于本发明技术方案的保护范围内。

Claims (3)

1.一种桥梁用钢丝拉索，包括多根钢丝，所述的多根钢丝以密排六方方式排布，钢丝之间有发泡橡胶，发泡橡胶内有陶瓷增强颗粒，多根钢丝外包裹有刚性外壳和HDPE护套，刚性外壳和层HDPE护套之间设有弹性层；
所述的钢丝组分为：C：0.32～0.58％，Si：4.1～5.3％，Ti：1.1～1.3％，Ni：1.0～1.1％，Cr：0.1～0.8％，Mo：0.1～0.15％，Cu：0.04～0.06％，Mn：0.3～1.8％，P、S含量小于0.012％，余量为铁，以上组分为重量百分比。
2.权利要求1所述的桥梁用钢丝拉索，在钢丝的间隙之间，以及钢丝和外壳之间的间隙填充发泡橡胶材料，发泡橡胶内有氧化铝颗粒，将橡胶混炼加入后在120-160℃下进行两次硫化发泡。使发泡橡胶材料体积膨胀充满钢丝之间以及钢丝和外壳之间的间隙。
3.权利要求2所述的桥梁用钢丝拉索，选择100质量份的橡胶，优选为乙烯基硅橡胶或苯基硅橡胶；20-30质量份的过氧化二异丙苯、8～20质量份的活性剂；5～8质量份的过氧化二叔丁基；2～7质量份的偶氮二甲酰胺；0～6质量份的甲基硅油，加入0.5-2质量份的氧化铝陶瓷粉。混炼后加入钢丝的间隙之间，以及钢丝和外壳之间的间隙，在120-160℃下进行两次硫化发泡。使发泡橡胶材料体积膨胀充满钢丝之间以及钢丝和外壳之间的间隙，并具有一定的支撑强度。
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