CN106907530A - 一种内衬塑料管金属管及其制造方法 - Google Patents
一种内衬塑料管金属管及其制造方法 Download PDFInfo
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- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
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Abstract
一种内衬塑料管金属管及其制备方法,包括金属管和塑料复合管材,所述塑料复合管材由外层热熔胶层和内层塑料管构成,所述的塑料复合管材经在线制作而成,所述的金属管内壁经打磨后进行喷砂、喷丸或抛丸处理,将所述的塑料复合管材拉入处理好的金属管内,将塑料复合管材两端密封、充气,放入密封的蒸汽房或烘烤房中进行加热处理,使金属管与塑料复合管材粘固,修边,喷涂,即可。本发明还包括一种内衬塑料管金属管的制造方法。本发明采用密封的蒸汽房或烘烤房进行加热,产品质量稳定,合格率高;能同时加热多根甚至不同规格型号的管材,总的加热时间减少,生产效率高,可节约产品加热能耗成本,更加可以节约生产用厂房和生产设备,降低投资成本。
Description
技术领域
本发明涉及一种内衬塑料管金属管及其制造方法。
背景技术
现有金属管常被用作供水输水管道,为了解决其防腐问题,最普通的方法是在管内采用水泥砂浆内衬或环氧树脂、环氧陶瓷内衬为该类管道的首选防腐方式;使用水泥砂浆内衬作为饮用水输水管道,由于内壁不光滑,水流阻力大,且易结垢,水泥硬化产生的反应物质影响水质,内衬厚度较大,达到3-12mm,输水效率较低,水泥内衬导致整个管体重量增大,不利于施工安装,并且水泥内衬加工不方便,附着力差,施工安装过程中的冲击和管材变形容易造成水泥脱落,水泥内衬尚存诸多尚待解决的难点,所以水泥内衬不是好的内衬方式;采用环氧树脂内衬,由于内衬层易分层脱落、材料成本高、环氧树脂固化过程产生的有害物质对水质和人体健康的影响,很难大面积推广,采用环氧陶瓷内衬,虽然会有很高的附着力和光洁度,但制造难度大,设备复杂,成本高,只能用于特殊性工程,无法得到普遍应用。
发明内容
本发明所要解决的技术问题是,提供一种内衬塑料管金属管,其结构简单、制作容易、成本低、机械性能好、卫生环保、抗腐蚀性能好、使用寿命长、内壁光滑、水流阻力小、输水效率高、能耗低、内衬附着力高、环境适应性强,性价比高且易于普及推广。
本发明进一步所要解决的技术问题是,提供一种内衬塑料管金属管的制造方法,它通过连续在线制作塑料复合管材;金属管内壁打磨后进行喷砂、喷丸或抛丸;塑料复合管材拉入内壁处理好的金属管内,经密封、充气、加热、冷却、修边、喷涂工序在线操作,从而实现内衬塑料管金属管的制作。
本发明解决其技术问题所采用的技术方案是:
本发明之内衬塑料管金属管,包括金属管和塑料复合管材,所述塑料复合管材由外层热熔胶层和内层塑料管构成,所述的塑料复合管材经在线制作而成,所述的金属管内壁经打磨后进行喷砂、喷丸或抛丸处理,将所述的塑料复合管材拉入处理好的金属管内,将塑料复合管材两端密封、充气,放入密封的蒸汽房或烘烤房中进行加热处理,使金属管与塑料复合管材粘固,修边,喷涂,即可。
进一步,所述金属管可为球墨铸铁管等。
进一步,所述蒸汽房可为蒸汽池等。
本发明之内衬塑料管金属管的制造方法,包括以下步骤:
A、塑料树脂和热熔胶制作塑料复合管材
1)塑料树脂、热熔胶干燥处理;
2)共挤挤出或热熔胶外涂在塑料管上;
3)真空定型;
4)冷却;
5)牵引;
6)定长切割;
B、金属管内壁处理
7)打磨;
8)喷砂、喷丸或抛丸;
C、拉管
9)夹管;
10)拉入;
D、衬管
11)密封;
12)充气;
13)加热:放入密封的蒸汽房或烘烤房中进行加热处理;
14)修边;
15)喷涂。
进一步,步骤2)中,共挤挤出热熔胶层或外涂热熔胶层的厚度0.2-0.5mm。
进一步,步骤12)中,充气气压为0.2MPa±0.05MPa。
进一步,步骤(13)中,蒸汽房或烘烤房中进行密封加热处理的温度控制在145℃±5℃。
进一步,步骤(13)中,加热时间为30-40分钟。
进一步,在密封的蒸汽房或烘烤房中进行加热处理时,可放置两根以上的管材集中加热处理。
进一步,两根以上的管材可为不同规格的管材。
本发明之内衬塑料管金属管的制造方法,它包括在线制作内层为塑料(聚乙烯)、外层为热熔胶的塑料复合管材;金属管内壁经打磨处理后再进行喷砂、喷丸或抛丸处理;将塑料复合管材拉入处理好的金属管内,再将管材两端密封、充气、放入密封的蒸汽房或烘烤房加热(单根或多根同时加热),冷却,修边,喷涂,标识,即可。它克服了现有水泥砂浆内衬金属管存在的内壁不光滑,水流阻力大,易结垢,水泥硬化过程产生的有害物质影响水质,内衬厚度大,输水效率低,管材受冲击、变形水泥易脱落等缺陷;也克服了现有环氧树脂、环氧陶瓷内衬金属管制作成本高,易分层,环氧树脂固化过程影响水质和职工健康等缺陷。
与现有技术相比,本发明具有以下特点:
(1)本发明采用金属管与塑料复合管材整体粘固的技术方案,通水能力和输水效率大大提高,同时达到节能降耗的效果。
(2)本发明采用金属管与塑料复合管材整体粘固的技术方案,使金属管管壁变得光滑、又不结垢,水流阻力小,管道综合能耗和运行成本大大降低。
(3)本发明采用金属管与塑料复合管材整体粘固的技术方案,内衬塑料完全阻隔了水与铸铁管管壁的接触,杜绝了输水过程中水质的二次污染,使水质变得更卫生健康。
(4)本发明采用金属管与塑料复合管材整体粘固的技术方案,使金属管保持了本身良好的机械性能,内衬塑料管使管道抗腐蚀性能和使用寿命大大提高。
(5)本发明采用金属管与塑料复合管材整体粘固的技术方案,内层为聚乙烯管,韧性好,内外层采用热熔胶粘接,大大提高了金属管与内衬聚乙烯管的附着力,解决了其他内衬方式内衬层易开裂、分层、脱落的问题,使施工变得方便、快捷、简单。
(6)本发明采用对金属管内壁进行打磨,使铸铁管内壁更光滑平整,再通过喷砂、喷丸或抛丸工艺处理,大大的提高了铸铁管和热熔胶层、内衬塑料管的粘接质量,使成品管更光滑平整,水流阻力会更小,管道的综合能耗和运行成本会降得更低。
(7)本发明适合于大口径管材的生产(现有技术只适应于口径500mm以下管材,本发明可适应于口径2600mm以上管材),同时设备简单灵活,适合于工厂流水线、大批量生产,生产效率高,生产成本低,使内衬塑料管金属管市场竞争力大大提高。
(8)本发明采用密封的蒸汽房或烘烤房加热衬管复合后进行喷涂的技术方案,可利用加热的余温加速喷涂的干燥速度,提高生产效率。
(9)本发明采用密封的蒸汽房或烘烤房进行加热,温度均匀一致,管材各部位受热均匀,金属管与热熔胶层及塑料管粘接面无漏点,产品质量稳定,产品合格率高。
(10)本发明采用密封的蒸汽房或烘烤房进行加热,能同时加热多根甚至不同规格型号的管材,总的加热时间减少,生产效率高,此外,由于同时加热多根不同规格型号管材,可大大节约产品加热的能耗成本,更加可以大量节约生产用厂房和生产设备,大大降低投资成本,同时也能降低产品制造成本、提高市场竞争力。
(11)本加热方式更安全、更有利于生产工人的身心健康。
具体实施方式
下面结合实施例对本发明作进一步的说明。
实施例
本实施例之内衬塑料管承插式球墨铸铁管,包括承插式球墨铸铁管和塑料复合管材,所述塑料复合管材由外层热熔胶层和内层塑料管(聚乙烯)构成。
所述的塑料复合管材经在线制作而成:聚乙烯和热熔胶干燥处理,分别经挤出机挤出至共挤模具,制作出外层为热熔胶、内层为聚乙烯的双层塑料复合管材,热熔胶层厚度为0.3mm,聚乙烯层厚度为3mm,外径比球墨铸铁管内径小0.5mm,再经过真空定型、冷却,牵引机牵引、切割成衬管复合成型所需要的长度。
所述的球墨铸铁管内壁经内磨机打磨平整,再将打磨平整的球墨铸铁管经喷砂、喷丸或抛丸,使球墨铸铁管内壁氧化层、铁锈清除干净并得到一定粗糙度的磨砂面。
为了保证内衬塑料管顺利拉入球墨铸铁管内并方便密封头密封内衬塑料管,将塑料复合管一端套入拉管机夹具,内壁处理好的球墨铸铁管置于拉管机平台,将塑料复合管拉入球墨铸铁管内。
为了保证球墨铸铁管与内衬塑料管粘结为一体,管材两端经密封头密封,充入压缩空气至0.2MPa,置于密封的蒸汽房或烘烤房内加热至145℃,保持30分钟卸掉密封装置,修边、喷涂、标识。
所述的内衬塑料管承插式球墨铸铁管的制造方法,包括以下步骤:
A、聚乙烯和热熔胶制作塑料复合管
1)聚乙烯、热熔胶干燥处理—烘干机;
2)共挤挤出—挤出机、共挤模具;
3)真空定型—定径套、真空箱;
4)冷却—喷淋水箱;
5)牵引—牵引机;
6)定长切割—切割机;
B、承插式球墨铸铁管(包含外壁锌层)内壁处理
7)打磨—内磨机;
8)喷砂、喷丸或抛丸—喷砂机、喷丸机或抛丸机;
C、拉管
9)夹管—夹具;
10)拉入—拉管机;
D、衬管
11)密封—密封头;
12)充气—充气管;
13)加热—密封的蒸汽房或烘烤房;
14)修边—修边机;
15)喷涂—喷涂机;
16)标识—喷码机;
E、检测、验收入库。
Claims (10)
1.一种内衬塑料管金属管,其特征在于:包括金属管和塑料复合管材,所述塑料复合管材由外层热熔胶层和内层塑料管构成,所述的塑料复合管材经在线制作而成,所述的金属管内壁经打磨后进行喷砂、喷丸或抛丸处理,将所述的塑料复合管材拉入处理好的金属管内,将塑料复合管材两端密封、充气,放入密封的蒸汽房或烘烤房中进行加热处理,使金属管与塑料复合管材粘固,修边,喷涂,即可。
2.根据权利要求1所述的内衬塑料管金属管,其特征在于:所述金属管为球墨铸铁管。
3.根据权利要求1或2所述的内衬塑料管金属管,其特征在于:所述蒸汽房为蒸汽池。
4.一种内衬塑料管金属管的制造方法,其特征在于,包括以下步骤:
A、塑料树脂和热熔胶制作塑料复合管材
1)塑料树脂、热熔胶干燥处理;
2)共挤挤出或热熔胶外涂在塑料管上;
3)真空定型;
4)冷却;
5)牵引;
6)定长切割;
B、金属管内壁处理
7)打磨;
8)喷砂、喷丸或抛丸;
C、拉管
9)夹管;
10)拉入;
D、衬管
11)密封;
12)充气;
13)加热:放入密封的蒸汽房或烘烤房中进行加热处理;
14)修边;
15)喷涂。
5.根据权利要求4所述的内衬塑料管金属管的制造方法,其特征在于,步骤2)中,共挤挤出热熔胶层或外涂热熔胶层的厚度0.2-0.5mm。
6.根据权利要求4或5所述的内衬塑料管金属管的制造方法,其特征在于,步骤12)中,充气气压为0.2MPa±0.05MPa。
7.根据权利要求4或5所述的内衬塑料管金属管的制造方法,其特征在于,步骤(13)中,蒸汽房或烘烤房中进行密封加热处理的温度控制在145℃±5℃。
8.根据权利要求7所述的内衬塑料管金属管的制造方法,其特征在于,步骤(13)中,加热时间为30-40分钟。
9.根据权利要求4或5所述的内衬塑料管金属管的制造方法,其特征在于,在密封的蒸汽房或烘烤房中进行加热处理时,放置两根以上的管材集中加热处理。
10.根据权利要求9所述的内衬塑料管金属管的制造方法,其特征在于,两根以上的管材为不同规格的管材。
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