CN112593754B - 一种海上输电杆塔紧固件的保护方法 - Google Patents

一种海上输电杆塔紧固件的保护方法 Download PDF

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CN112593754B
CN112593754B CN202011392123.6A CN202011392123A CN112593754B CN 112593754 B CN112593754 B CN 112593754B CN 202011392123 A CN202011392123 A CN 202011392123A CN 112593754 B CN112593754 B CN 112593754B
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asphalt
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刘向艺
李然
刘子千
何勇军
焦平文
聂其兵
罗荣钧
王钦
侯炜
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State Grid Shandong Electric Power Co Construction Co
State Grid Corp of China SGCC
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Abstract

本发明提供一种海上输电杆紧固件的保护方法,包括以下步骤:(1)将输电杆塔紧固件进行清理,除去水和油分,清除灰尘和铁锈;(2)将底层涂料均匀喷涂在紧固件上;(3)涂上底层涂料后尽快将中层涂料涂刷上;(4)继续在中层涂料上涂上外层涂料;(5)涂料干燥后缠绕PE防护膜。该保护方法中的涂料与紧固件的附着力好,有效预防紧固件的腐蚀,延长使用寿命。

Description

一种海上输电杆塔紧固件的保护方法
技术领域
本发明涉及一种适用于滨海、重工业区等输变电杆塔的紧固件的紧固密封与防腐蚀的保护方法,特别涉及一种海上输电杆塔紧固件的保护方法。
背景技术
紧固件是输电杆塔的关键部件之一,其关系输电杆塔的可靠性和安全性。由于长期暴露在大气环境中,长期经受海上大气中的水汽、氧气和风等对金属表面有腐蚀作用的有害气体的侵蚀,金属自身必然出现锈蚀,尤其是在一些局部大气中含有硫化氢、二氧化硫等酸性气体的环境中,再加大气中的水汽混合作用,更是加剧了金属构件的锈蚀。金属的锈蚀会大大的缩短金属构件的使用寿命,严重时会成片脱落,影响其自身强度导致坍塌,危及安全。
防腐方法分为三种,一是采用紧固件采取防护涂层包括镀镉、电镀锌、热镀锌、机械镀锌、磷化处理等;二是采用整体采取涂层防护的方法,如:涂敷防腐涂料,金属喷涂、水泥覆盖层,底层富锌底漆、表层环氧树脂覆盖层等方法;三是采用结构矿脂包覆的方法,采用多层的矿脂防蚀膏层、防蚀带层、纤维增强树脂层等。这些技术在大气环境中有着广泛的应用,并取得良好的效果。但在输电杆塔的服役过程在遭受日照、干湿交替、风化等的苛刻条件的侵袭而引起的严重腐蚀破坏外,同时还要承受风吹的交变载荷的作用,这种作用可能导致紧固件松动、包覆层破裂等风险,在实际过程中出现保护层局部破损、使用寿命缩短的问题,尤其在滨海等环境较为苛刻的环境,甚至出现失去机械强度的严重后果,影响其使用可靠性,危及输电杆塔的结构安全。
发明内容
为解决上述问题,本发明提供一种海上输电杆紧固件的保护方法,与紧固件的附着力好,有效预防紧固件的腐蚀,延长使用寿命。
本发明通过以下技术方案实现的:
一种海上输电杆塔紧固件的保护方法,包括以下步骤:
(1)将输电杆塔紧固件进行清理,除去水和油分,清除灰尘和铁锈;
(2)将底层涂料均匀喷涂在紧固件上;
(3)涂上底层涂料后尽快将中层涂料涂刷上;
(4)继续在中层涂料上涂上外层涂料;
(5)涂料干燥后缠绕PE防护膜。
优选地,所述的底层涂料、中层涂料、外层涂料与PE防护膜的厚度比为:1-2:2:1:1-5。
优选地,所述步骤(2)中的底层涂料的质量份数组成为:酚醛树脂40-50份、纳米氧化物10-20份、甲基纤维素5-10份、钼酸盐5-10份、磺化油30-40份。
优选地,所述步骤(3)中的中层涂料质量份数组成为:石墨烯0.5-5份、有机硅树脂50-70份、硅烷偶联剂1-5份、沥青20-50份。
更优选地,所述的沥青为10#沥青和100#沥青按照重量比1-3:1混合得到的。
优选地,所述步骤(4)中的外层涂料质量份数组成为:PVDF树脂50-60份、亚硝酸钠复合缓蚀剂5-10份、碱式钼酸钨锌4-8份、聚乙烯吡咯烷酮2-5份、乙二醇丁醚20-30份、壳聚糖1-5份。
优选地,PE防护膜的处理方法为:将PE防护膜浸渍在环氧氯丙烷改性聚乙烯亚胺与苯乙烯-二乙烯基苯共聚体的混合水溶液中,浸渍时间为1-3min。
更优选地,所述的聚乙烯亚胺环氧氯丙烷与苯乙烯-二乙烯基苯共聚体的质量比为1-5:10,溶液的浓度为0.5-1.0g/L,调节pH为5-6。
优选地,所述的纳米二氧化硅的粒径为10-30纳米。
本发明的有益成果:
1.本发明所采用三层涂料可以有效防止水汽、二氧化硫等成分的侵入,防护紧固件的锈蚀,并且具有提高紧固件紧固而防松动的效果,可填充至螺纹、垫片和螺母与结构的间隙。
2.本发明所采用的涂料在低温、高温环境下硬度变化小,可填充缝隙,便于下一步包覆工艺的实施,并且具有难燃性。
3.本发明所采用的防护膜具有良好的柔软性,可适应结构往复载荷导致的位移变化,可与涂料很好的吻合,无龟裂发生,良好的耐水性,具有耐紫外线老化的作用,可阻止灰尘和水等渗入。防护效果好,防腐寿命长,交变载荷下无破坏。本防护膜加入耐高温成分,耐候性极佳。
4.本发明的PE防护膜浸渍的混合溶液,具有高强度防水性能,原料易得,施工方便,与水接触角大,防水效果好,水珠很容易沿着表面流下,疏水寿命长,强度高,适用于常见金属(铝、铜、钢等)、建筑材料、玻璃等表面处理等领域;具有常见的工业生活材料领域的普适性。
具体实施方式
为了更好地理解本发明的实质,下面通过具体实施例对本发明的技术方案进行进一步的阐述。
实施例1
一种海上输电杆塔紧固件的保护方法,包括以下步骤:
(1)将输电杆塔紧固件进行清理,除去水和油分,清除灰尘和铁锈;
(2)将底层涂料均匀喷涂在紧固件上,底层涂料的质量份数组成为:酚醛树脂40份、纳米氧化物10份、甲基纤维素5份、钼酸盐5份、磺化油30份。用高压喷射器将涂料喷洒为细雾状,细雾状的微滴在降落过程中均匀混合,分散液包裹在紧固件的表面,形成均匀的涂层。
(3)涂上底层涂料后尽快将中层涂料涂刷上,中层涂料质量份数组成为:石墨烯0.5份、有机硅树脂50份、硅烷偶联剂1份、沥青20份。沥青为10#沥青和100#沥青按照重量比1:1混合得到的。
(4)继续在中层涂料干燥后涂上外层涂料,外层涂料质量份数组成为:PVDF树脂50份、亚硝酸钠复合缓蚀剂5份、碱式钼酸钨锌4份、聚乙烯吡咯烷酮2份、乙二醇丁醚20份、壳聚糖1份。
(5)涂料干燥后缠绕PE防护膜,PE防护膜的处理方法为:将PE防护膜浸渍在环氧氯丙烷改性聚乙烯亚胺与苯乙烯-二乙烯基苯共聚体的质量比为1:10,溶液的浓度为0.5g/L,调节pH为5混合水溶液中,浸渍时间为3min。缠绕时用力拉伸防护膜,采取不小于50%搭接的方式缠绕,基本保持整个结构包覆两层防护膜。包覆后用手将防蚀带表面抚平,使其紧密贴合在钢结构表面。所述的纳米二氧化硅的粒径为10纳米。
底层涂料、中层涂料、外层涂料与PE防护膜的厚度分别为0.2mm、0.2mm、0.1mm、0.1mm。
实施例2
一种海上输电杆塔紧固件的保护方法,包括以下步骤:
(1)将输电杆塔紧固件进行清理,除去水和油分,清除灰尘和铁锈;
(2)将底层涂料均匀喷涂在紧固件上,底层涂料的质量份数组成为:酚醛树脂50份、纳米氧化物20份、甲基纤维素10份、钼酸盐10份、磺化油40份。用高压喷射器将涂料喷洒为细雾状,细雾状的微滴在降落过程中均匀混合,分散液包裹在紧固件的表面,形成均匀的涂层。
(3)涂上底层涂料后尽快将中层涂料涂刷上,中层涂料质量份数组成为:石墨烯5份、有机硅树脂70份、硅烷偶联剂5份、沥青50份。沥青为10#沥青和100#沥青按照重量比3:1混合得到的。
(4)继续在中层涂料干燥后涂上外层涂料,外层涂料质量份数组成为:PVDF树脂60份、亚硝酸钠复合缓蚀剂10份、碱式钼酸钨锌8份、聚乙烯吡咯烷酮5份、乙二醇丁醚30份、壳聚糖5份。
(5)涂料干燥后缠绕PE防护膜,PE防护膜的处理方法为:将PE防护膜浸渍在在环氧氯丙烷改性聚乙烯亚胺与苯乙烯-二乙烯基苯共聚体的质量比为5:10,溶液的浓度为1.0g/L,调节pH为6混合水溶液中,浸渍时间为1min。缠绕时用力拉伸防护膜,采取不小于50%搭接的方式缠绕,基本保持整个结构包覆两层防护膜。包覆后用手将防蚀带表面抚平,使其紧密贴合在钢结构表面。所述的纳米二氧化硅的粒径为30纳米。
底层涂料、中层涂料、外层涂料与PE防护膜的厚度分别为0.2mm、0.2mm、0.1mm、0.5mm。
实施例3
一种海上输电杆塔紧固件的保护方法,包括以下步骤:
(1)将输电杆塔紧固件进行清理,除去水和油分,清除灰尘和铁锈;
(2)将底层涂料均匀喷涂在紧固件上,底层涂料的质量份数组成为:酚醛树脂45份、纳米氧化物15份、甲基纤维素8份、钼酸盐7份、磺化油34份。用高压喷射器将涂料喷洒为细雾状,细雾状的微滴在降落过程中均匀混合,分散液包裹在紧固件的表面,形成均匀的涂层。
(3)涂上底层涂料后尽快将中层涂料涂刷上,中层涂料质量份数组成为:石墨烯2份、有机硅树脂60份、硅烷偶联剂3份、沥青30份。沥青为10#沥青和100#沥青按照重量比2:1混合得到的。
(4)继续在中层涂料干燥后涂上外层涂料,外层涂料质量份数组成为:PVDF树脂56份、亚硝酸钠复合缓蚀剂8份、碱式钼酸钨锌6份、聚乙烯吡咯烷酮3份、乙二醇丁醚27份、壳聚糖4份。
(5)涂料干燥后缠绕PE防护膜,PE防护膜的处理方法为:将PE防护膜浸渍在在环氧氯丙烷改性聚乙烯亚胺与苯乙烯-二乙烯基苯共聚体的质量比为3:10,溶液的浓度为0.7g/L,调节pH为5混合水溶液中,浸渍时间为2min。缠绕时用力拉伸防护膜,采取不小于50%搭接的方式缠绕,基本保持整个结构包覆两层防护膜。包覆后用手将防蚀带表面抚平,使其紧密贴合在钢结构表面。所述的纳米二氧化硅的粒径为10纳米。
底层涂料、中层涂料、外层涂料与PE防护膜的厚度分别为0.15mm、0.2mm、0.1mm、0.3mm。
对比例1
其他条件相同,步骤(5)中的PE防护膜不做处理,直接缠绕。
对比例2
其他条件相同,步骤(5)中的PE防护膜处理为:在缠绕后的PE防护膜涂抹表层胶黏剂,按重量百分比计成分为:聚氨酯树脂33%、水32.5%、钛白粉0.5%、二氧化硅2%、硅微粉8%、云母氧化铁12%和二氯异氰尿酸钠7%,改性滑石粉5%。
测试例1:试验方法,按照上述实施例1-3和对比例1-2中记载的方式对结构件进行防腐蚀处理,而后对经防护处理的构建进行交变拉应力,试验周期为3000周,拉力为5000N。
经过3000周交变试验后的样件采用中性盐雾箱进行盐雾试验,试验时间为1800h,即1800h后观察实施例1-3被保护物体,试验后的外观:均未生锈;去掉防护膜外观:均未生锈;去掉复合涂层包覆后,观察其外观,可见被保护构件保护效果很好,且紧固件均没有松动。对比例1-2被保护物体在1600h后生锈。
测试例2:
Figure DEST_PATH_IMAGE001
本发明保护方法适用于各种输电杆塔的复杂紧固件连接结构的防护。

Claims (4)

1.一种海上输电杆塔紧固件的保护方法,其特征在于,包括以下步骤:
(1)将输电杆塔紧固件进行清理,除去水和油分,清除灰尘和铁锈;
(2)将底层涂料均匀喷涂在紧固件上;
(3)涂上底层涂料后尽快将中层涂料涂刷上;
(4)继续在中层涂料上涂上外层涂料;
(5)涂料干燥后缠绕PE防护膜;PE防护膜的处理方法为:将PE防护膜浸渍在环氧氯丙烷改性聚乙烯亚胺与苯乙烯-二乙烯基苯共聚体的混合水溶液中,浸渍时间为1-3min;
所述的底层涂料、中层涂料、外层涂料与PE防护膜的厚度比为:1-2:2:1:1-5;
所述步骤(2)中的底层涂料的质量份数组成为:酚醛树脂40-50份、纳米氧化物10-20份、甲基纤维素5-10份、钼酸盐5-10份、磺化油30-40份;
所述步骤(3)中的中层涂料质量份数组成为:石墨烯0.5-5份、有机硅树脂50-70份、硅烷偶联剂1-5份、沥青20-50份;
所述步骤(4)中的外层涂料质量份数组成为:PVDF树脂50-60份、亚硝酸钠复合缓蚀剂5-10份、碱式钼酸钨锌4-8份、聚乙烯吡咯烷酮2-5份、乙二醇丁醚20-30份、壳聚糖1-5份。
2.根据权利要求1所述的保护方法,其特征在于,所述的沥青为10#沥青和100#沥青按照重量比1-3:1混合得到的。
3.根据权利要求1所述的保护方法,其特征在于,所述的环氧氯丙烷改性聚乙烯亚胺与苯乙烯-二乙烯基苯共聚体的质量比为1-5:10,溶液的浓度为0.5-1.0g/L,调节pH为5-6。
4.根据权利要求1所述的保护方法,其特征在于,所述的纳米氧化物为纳米二氧化硅,粒径为10-30纳米。
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