CN203686398U - 燃油输送管路 - Google Patents

燃油输送管路 Download PDF

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CN203686398U
CN203686398U CN201420208381.8U CN201420208381U CN203686398U CN 203686398 U CN203686398 U CN 203686398U CN 201420208381 U CN201420208381 U CN 201420208381U CN 203686398 U CN203686398 U CN 203686398U
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low
fuel oil
nylon
conveying pipeline
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杨泉良
薛长鸣
张宁宁
吴宁
王彦飞
张兴伟
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SHANGHAI CHINAUST AUTOMOTIVE PLASTICS CORP Ltd
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SHANGHAI CHINAUST AUTOMOTIVE PLASTICS CORP Ltd
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Abstract

本实用新型提供一种燃油输送管路,其包括有:一保护层、一阻隔层和一低析出层;所述保护层与阻隔层以及所述阻隔层与所述低析出层之间分别设置有一粘接层;所述保护层包裹所述阻隔层,所述阻隔层包裹所述低析出层;所述低析出层由尼龙9T制成,用于直接与所述燃油输送管路内的燃油接触。通过设置低析出层在最内层直接接触燃油,使得燃油输送管路产生的低聚物析出量大幅减少;进一步设置保护层和阻隔层,使得燃油输送管路的抗冲击性和阻隔性更好。

Description

燃油输送管路
技术领域
本实用新型涉及一种燃油输送管路。
背景技术
目前,由于尼龙具有重量轻、机械性好、低温抗冲性好、耐化学性能好等优点,燃油输送管路大多由尼龙材料制成。
但是,现有由尼龙材料制成的燃油输送管路,存在有这样的缺陷,由于在尼龙等高分子材料在聚合过程中,有可能产生低聚物(又称寡聚物,旧称齐聚物、低聚反应产物,分子量在1500以下和分子长度不超过5纳米的聚合物)。低聚物的性质与高聚物不同,能溶解、蒸馏、形成晶体或无定形物质。这样一来,附带有大量低聚物的聚合材料在与燃油接触时,燃油会将低聚物溶解,当环境温度降低时,燃油系统的温度随之降低,溶解的低聚物会凝聚为固体絮状物,从而会有堵塞喷油嘴的风险,引起供油系统中断。
另外,具有低析出特性的材料,往往其机械强度、延展性和阻隔性(燃油挥发物质的阻隔能力)又低于其他尼龙材料。
实用新型内容
本实用新型要解决的技术问题是为了克服现有技术尼龙等聚合物材料的燃油输送管路存在低聚物析出较多而影响燃油质量的缺陷,提供一种机械性、延展性和阻隔性较好且低聚物析出影响较小的燃油输送管路。
本实用新型是通过下述技术方案来解决上述技术问题:
一种燃油输送管路,其特点在于,其包括有:一保护层、一阻隔层和一低析出层;
所述保护层与阻隔层以及所述阻隔层与所述低析出层之间分别设置有一粘接层;
所述保护层包裹所述阻隔层,所述阻隔层包裹所述低析出层;
所述低析出层由尼龙9T制成,用于直接与所述燃油输送管路内的燃油接触。
此处,尼龙9T为一种具有低析出特点的尼龙材料,工作温度为-60~+150℃,具有极好的耐氧化性和耐还原性。由于燃油具有挥发性,挥发物如果穿透管路,将造成浪费。而尼龙9T的阻隔性和机械强度较差,因此,本方案中,为了弥补这一缺陷,在低析出层外包裹有一阻隔层和一机械强度更高的保护层。阻隔层用于防止挥发物从管路散出,保护层用于保护阻隔层和低析出层。
较佳的,所述保护层由尼龙12制成。
此处,尼龙12化学俗称聚十二内酰胺,其熔点低,熔点为170~180℃,成型加工容易,成型温度范围较宽;柔软性、化学稳定性、耐油性、耐磨性均较好,且尼龙12是很好的电气绝缘体并且和其它聚酰胺一样不会因潮湿影响绝缘性能。它有很好的抗冲击性及化学稳定性。由尼龙12制成的保护层可以较好的弥补尼龙9T制成的低析出层抗冲击性较差的缺陷,对低析出层和阻隔层进行保护。
较佳的,所述阻隔层由EVOH(乙烯/乙烯醇共聚物,Ethylene vinyl alcoholcopolymer)制成。
此处,EVOH为一种高阻隔性的材料,可以弥补作为最内层与燃油直接接触的尼龙9T的阻隔性不足的缺陷。
较佳的,所述粘接层由尼龙612制成。
此处,相对宽度小,更低的吸水率和密度,尺寸稳定性好的优点,有较高的拉伸强度和冲击强度,透明度,其非常适合作为粘接层的材料。
本实用新型的积极进步效果在于:通过设置低析出层在最内层直接接触燃油,使得燃油输送管路产生的低聚物析出量大幅减少;进一步设置保护层和阻隔层,使得燃油输送管路的抗冲击性和阻隔性更好。
附图说明
图1为本实用新型较佳实施例的燃油输送管路的部分截面的结构示意图。
具体实施方式
下面举个较佳实施例,并结合附图来更清楚完整地说明本实用新型。
图1为本实施例的燃油输送管路的部分截面的结构示意图,如图1所示,本实施例涉及的燃油输送管路包括有:保护层1、阻隔层3和低析出层5。
保护层1与阻隔层3之间设置有粘接层2,阻隔层3与低析出层5之间分别设置有粘接层4。
其中,保护层1隔着粘接层2包裹阻隔层3,阻隔层3隔着粘接层4包裹低析出层5。
低析出层5由尼龙9T制成,用于直接与燃油输送管路内的燃油接触。
粘接层由尼龙612制成。
尼龙9T为一种具有低析出特点的尼龙材料,工作温度为-60~+150℃,具有极好的耐氧化性和耐还原性。由于燃油具有挥发性,挥发物如果穿透管路,将造成浪费。而尼龙9T的阻隔性和机械强度较差,因此,本实施例中,为了弥补这一缺陷,在低析出层5外包裹有阻隔层3和机械强度更高的保护层1。
保护层1由尼龙12制成,用于在最外层保护低析出层5和阻隔层3,使得整个燃油输送管路的抗冲击性提高。
另外,阻隔层3由EVOH制成,由于EVOH具有高阻隔性,可以防止燃油的挥发物散发至外部。
虽然以上描述了本实用新型的具体实施方式,但是本领域的技术人员应当理解,这仅是举例说明,本实用新型的保护范围是由所附权利要求书限定的。本领域的技术人员在不背离本实用新型的原理和实质的前提下,可以对这些实施方式做出多种变更或修改,但这些变更和修改均落入本实用新型的保护范围。

Claims (4)

1.一种燃油输送管路,其特征在于,其包括有:一保护层、一阻隔层和一低析出层;
所述保护层与阻隔层以及所述阻隔层与所述低析出层之间分别设置有一粘接层;
所述保护层包裹所述阻隔层,所述阻隔层包裹所述低析出层;
所述低析出层由尼龙9T制成,用于直接与所述燃油输送管路内的燃油接触。
2.如权利要求1所述的燃油输送管路,其特征在于,所述保护层由尼龙12制成。
3.如权利要求1所述的燃油输送管路,其特征在于,所述阻隔层由EVOH制成。
4.如权利要求1~3中任一项所述的燃油输送管路,其特征在于,所述粘接层由尼龙612制成。
CN201420208381.8U 2014-04-25 2014-04-25 燃油输送管路 Expired - Lifetime CN203686398U (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104075068A (zh) * 2014-07-17 2014-10-01 梅晓萌 一种具有消音装置的燃油输送管路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104075068A (zh) * 2014-07-17 2014-10-01 梅晓萌 一种具有消音装置的燃油输送管路

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