CN110450503A - 气体检测管的生产方法 - Google Patents

气体检测管的生产方法 Download PDF

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CN110450503A
CN110450503A CN201910664416.6A CN201910664416A CN110450503A CN 110450503 A CN110450503 A CN 110450503A CN 201910664416 A CN201910664416 A CN 201910664416A CN 110450503 A CN110450503 A CN 110450503A
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detecting tube
gas detecting
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王宇源
冯雪雁
康树峰
龙玉克
王成
张冯
王坤
和淑慧
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Shenzhen Wal Nuclear Material Co Ltd
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Abstract

本发明公开一种气体检测管的生产方法，包括将支撑层原材料通过单螺杆挤出机挤出带有加强结构的管材；将带有加强结构的管材在打孔设备上沿轴向方向打出若干等间距的通孔；将打孔后的管材经过辐照后得到支撑层；在支撑层外表面涂覆一层润滑油，然后通过押出机复合上透气层形成气体检测管半成品；将气体检测管半成品的外表面用编织带编织一层编织层，完成气体检测管的生产。本发明气体检测管的生产方法使得气体检测管运输更加便捷，支撑强度更大，耐磨性能优异，大大延长了使用寿命。

Description

气体检测管的生产方法
技术领域
本发明涉及一种气体检测管的生产方法。
背景技术
根据工程条件的需求，天然气管道通常会埋于地下或在地表面连续铺设几百米甚至几公里。气体检测管主要安装在天然气管道外周，用于对天然气管道的实时监控，以避免因管道破裂或焊接处气体泄漏导致的安全隐患。目前常见的气体检测管支撑层一般采用多孔不锈钢管，不锈钢材质的管体结构，有着较高的强度，在运输和安装过程中不易被压扁或变形，但是不锈钢材质密度大、耐腐蚀性差，连续长度太短、安装接头多、运输成本高，因此，迫切需要一种生产具备一定的支撑力、透气性、耐磨性以及连续性可便携运输的气体检测管的方法。
发明内容
本发明的目的在于针对上述问题，提供一种支撑力强、耐磨性能优异且便于运输的气体检测管的生产方法。
为达成上述目的，本发明提供一种气体检测管的生产方法，所述气体检测管包括自内而外依次设置的支撑层、透气层和编织层，包括以下步骤：
步骤一，将支撑层原材料通过单螺杆挤出机挤出带有加强结构的管材，所述管材内径为12.0±0.05mm，壁厚为2.0±0.05mm，挤出温度为130-180℃；
步骤二，将带有加强结构的管材在打孔设备上沿轴向方向打出若干等间距的通孔，所述通孔孔径距离为5-10mm，孔径大小为1-3mm，所述通孔用于将所述泄露天然气从所述透气层渗透入所述支撑层；
步骤三，将上述打孔后的管材经过电子加速器或钴源或紫外光源辐照后得到支撑层，辐照剂量为10-20Mrad；
步骤四，在所述支撑层外表面涂覆一层润滑油，然后通过押出机复合上所述透气层形成气体检测管半成品，押出温度为150℃，所述透气层与支撑层之间保持有1mm左右的间隙，所述间隙用于安装天然气监测传感器，所述透气层厚度为0.7-1.2mm；
步骤五，将上述气体检测管半成品的外表面用编织带编织一层所述编织层，完成气体检测管的生产，所述编织带宽度为3-5mm，厚度0.3-0.5mm。
优选地，所述气体检测管支撑层原材料按重量计，包括聚乙烯共混物100份、复合抗氧剂0.5-10份、敏化剂0.5-3份和防析出剂1-5份。
优选地，所述加强结构为螺旋加强筋或凹槽结构，用于增强所述支撑层强度以及防止与所述透气层贴紧。
优选地，所述润滑油为离型剂或硅油，所述离型剂为油性透明离型剂AL-153或TH1000，所述硅油为甲基硅油。
优选地，所述透气层材料是VA含量为14-18wt％，熔融指数为2-5g/10min(190℃，2.16kg)的乙烯醋酸乙烯酯(EVA)。
优选地，所述编制层采用由24根轴线编织而成的节距为37-50.8mm的结构，用于保护所述透气层及支撑层在管道铺设过程中不被砂砾磨损以及过滤大颗粒杂质。
本发明与现有技术相比具有以下有益技术效果：
本发明气体检测管的生产方法挤出带有加强结构的支撑层，所述加强结构大大增加了支撑层的强度，延长了气体检测管的使用寿命；同时在透气层外使用编织带编织一层所述编织层，所述编织层用于过滤大颗粒杂质，保护透气层及支撑层在管道铺设过程中不被砂砾磨损，使得运输更加便捷。
具体实施方式
为详细说明本发明的技术内容、工艺方法，以下结合实施方式详予说明。
以下记载了本实施方式本发明的几个具体实施例：
实施例1
一种气体检测管的生产方法，所述气体检测管包括自内而外依次设置的支撑层、透气层和编织层，包括以下步骤：
步骤一，将支撑层原材料通过单螺杆挤出机挤出带有螺旋加强筋的管材，所述管材内径为12.0±0.05mm，壁厚为2.0±0.05mm，挤出温度为130℃；
步骤二，将带有加强结构的管材在打孔设备上沿轴向方向打出若干等间距的通孔，所述通孔孔径距离为10mm，孔径大小为1mm，所述通孔用于将所述泄露天然气从所述透气层渗透入所述支撑层；
步骤三，将上述打孔后的管材经过电子加速器或钴源或紫外光源辐照后得到支撑层，辐照剂量为10-20Mrad；
步骤四，在所述支撑层外表面涂覆一层油性透明离型剂AL-153，然后通过押出机复合上所述透气层形成气体检测管半成品，押出温度为150℃，所述透气层与支撑层之间保持有1mm左右的间隙，所述间隙用于安装天然气监测传感器，所述透气层厚度为0.8-1.0mm；
步骤五，将上述气体检测管半成品的外表面用编织袋编织一层所述编织层，完成气体检测管的生产，所述编织带宽度为3mm，厚度0.3mm。
作为本实施例的进一步改进，所述透气层材料是VA含量为14wt％，熔融指数为4g/10min(190℃，2.16kg)的乙烯醋酸乙烯酯(EVA)。
作为本实施例的进一步改进，所述编制层采用由24根轴线编织而成的节距为37mm的结构，用于保护所述透气层及支撑层在管道铺设过程中不被砂砾磨损以及过滤大颗粒杂质，使得运输更加便捷。
实施例2
一种气体检测管的生产方法，所述气体检测管包括自内而外依次设置的支撑层、透气层和编织层，包括以下步骤：
步骤一，将支撑层原材料通过单螺杆挤出机挤出带有凹槽结构的管材，所述管材内径为12.0±0.05mm，壁厚为2.0±0.05mm，挤出温度为150℃；
步骤二，将带有加强结构的管材在打孔设备上沿轴向方向打出若干等间距的通孔，所述通孔孔径距离为5mm，孔径大小为1mm，所述通孔用于将所述泄露天然气从所述透气层渗透入所述支撑层；
步骤三，将上述打孔后的管材经过电子加速器或钴源或紫外光源辐照后得到支撑层，辐照剂量为10-20Mrad；
步骤四，在所述支撑层外表面涂覆一层甲基硅油，然后通过押出机复合上所述透气层形成气体检测管半成品，押出温度为150℃，所述透气层与支撑层之间保持有1mm左右的间隙，所述间隙用于安装天然气监测传感器，所述透气层厚度为0.9-1.0mm；
步骤五，将上述气体检测管半成品的外表面用编织袋编织一层所述编织层，完成气体检测管的生产，所述编织带宽度为5mm，厚度0.5mm。
作为本实施例的进一步改进，所述透气层材料是VA含量为18wt％，熔融指数为3g/10min(190℃，2.16kg)的乙烯醋酸乙烯酯(EVA)。
作为本实施例的进一步改进，所述编制层采用由24根轴线编织而成的节距为40.6mm的结构，用于保护所述透气层及支撑层在管道铺设过程中不被砂砾磨损以及过滤大颗粒杂质，使得运输更加便捷。
实施例3
本实施例与实施例2的区别在于：所述透气层厚度为0.8-0.9mm，所述透气层材料是VA含量为16wt％，熔融指数为2g/10min(190℃，2.16kg)的乙烯醋酸乙烯酯(EVA)。
综上所述，本发明气体检测管的生产方法挤出带有加强结构的支撑层，所述加强结构大大增加了支撑层的强度，延长了气体检测管的使用寿命；同时在透气层外使用编织带编织一层所述编织层，所述编织层用于过滤大颗粒杂质，保护透气层及支撑层在管道铺设过程中不被砂砾磨损，使得运输更加便捷。。
本发明并不局限于上述具体实施方式，熟悉本技术领域的人员还可据此做出多种变化，但任何与本发明等同或相类似的变化都应涵盖在本发明权利要求的范围内。

Claims (6)

1.一种气体检测管的生产方法，所述气体检测管包括自内而外依次设置的支撑层、透气层和编织层，其特征在于，包括以下步骤：
步骤一，将支撑层原材料通过单螺杆挤出机挤出带有加强结构的管材，所述管材内径为12.0±0.05mm，壁厚为2.0±0.05mm，挤出温度为130-180℃；
步骤二，将带有加强结构的管材在打孔设备上沿轴向方向打出若干等间距的通孔，所述通孔孔径距离为5-10mm，孔径大小为1-3mm；
步骤三，将上述打孔后的管材经过电子加速器或钴源或紫外光源辐照后得到支撑层，辐照剂量为10-20Mrad；
步骤四，在所述支撑层外表面涂覆一层润滑油，然后通过押出机复合上所述透气层形成气体检测管半成品，押出温度为150℃，所述透气层与支撑层之间保持有1mm左右的间隙，所述透气层厚度为0.7-1.2mm；
步骤五，将上述气体检测管半成品的外表面用编织带编织一层所述编织层，完成气体检测管的生产，所述编织带宽度为3-5mm，厚度0.3-0.5mm。
2.根据权利要求1所述的气体检测管的生产方法，其特征在于：所述气体检测管支撑层原材料按重量计，包括聚乙烯共混物100份、复合抗氧剂0.5-10份、敏化剂0.5-3份和防析出剂1-5份。
3.根据权利要求1所述的气体检测管的生产方法，其特征在于：所述加强结构为螺旋加强筋或凹槽结构。
4.根据权利要求1所述的气体检测管的生产方法，其特征在于：所述润滑油为离型剂或硅油，所述离型剂为油性透明离型剂AL-153或TH1000，所述硅油为甲基硅油。
5.根据权利要求1所述的气体检测管的生产方法，其特征在于：所述透气层材料是VA含量为14-18wt％，熔融指数为2-5g/10min(190℃，2.16kg)的乙烯醋酸乙烯酯(EVA)。
6.根据权利要求1所述的气体检测管的生产方法，其特征在于：所述编制层采用由24根轴线编织而成的节距为37-50.8mm的结构。
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