CN114574267A - 一种用于盾构机的盾尾密封油脂及其制备方法 - Google Patents
一种用于盾构机的盾尾密封油脂及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种用于盾构机的盾尾密封油脂及其制备方法,本发明提供的一种用于盾构机的盾尾密封油脂,由以下质量百分比的各组分组成:基础油10‑40%、填充剂20‑30%、改性纤维10‑23%、润滑剂8‑12%、增粘剂8‑15%、阻燃剂2‑6%和防腐剂1‑3%。本发明通过将增粘剂加入到密封油脂中,可以使密封油脂里各个组分结合程度大大提高,进一步提高密封油脂的防水性能和抗水密封性,而且本发明还在密封油脂中加入了改性纤维,可以使密封油脂具有良好的泵送性和优异的减摩抗磨性能。
Description
技术领域
本发明属于密封油脂技术领域,更具体地说,是涉及一种用于盾构机的盾尾密封油脂及其制备方法。
背景技术
盾构机(全名为盾构隧道挖掘机)是一种在地下及山体工程施工中挖掘软弱地质使之成洞的专用隧道掘进工程机械,广泛应用于隧道挖掘工程中。在盾构机推进过程中,由于盾尾和管壁之间的磨擦,会影响盾构机的推进和损坏盾尾装置,而且土层中泥浆渗入也会影响盾构机的正常工作和增加施工难度。盾尾密封油脂用于对盾构机的尾部起到密封作用,隔绝地下水和泥浆的渗入;同时盾尾密封油脂的润滑作用能减小盾尾和管片外壁的摩擦,有效地保护盾尾,保障盾构机的顺利推进。
在盾构机掘进过程中,如果盾构运行温度较高,密封油脂不能保证良好的润滑和密封性能,施工人员只能依靠加大油脂泵送,停机降温或者减慢注浆等措施,来解决密封油脂密封性能较差的问题。
发明内容
本发明的目的在于提供一种用于盾构机的盾尾密封油脂及其制备方法,旨在解决现有的密封油脂密封性能较差的问题。
为实现上述目的,本发明采用的技术方案是:
一种用于盾构机的盾尾密封油脂,由以下质量百分比的各组分组成:基础油10-40%、填充剂20-30%、改性纤维10-23%、润滑剂8-12%、增粘剂8-15%、阻燃剂2-6%和防腐剂1-3%。
优选地,所述基础油为异辛醇改性大豆油、蓖麻油、油酸异辛醇酯或油醇油酸酯中的一种或多种。
优选地,还包括改性淀粉5-8%。
优选地,所述填充剂为碳酸钙、碳酸镁、滑石粉、硫酸钡中的一种或多种。
优选地,所述润滑剂为二硫化钼、锂基润滑脂、钙基润滑脂、钠基脂或者钛基脂中的一种或多种。
优选地,所述防腐剂为苯基萘胺、丁羟基茴香醚、2,6-二叔丁基酚、2,6- 二叔丁基对甲酚或2,4,6-三叔丁基苯酚一种或多种。
本发明还提供了一种用于盾构机的盾尾密封油脂制备方法,包括:
步骤1:将基础油、润滑剂和增粘剂加入到捏合机中,在60-90℃温度中充分捏合1-4h得到第一密封油混合物;
步骤2:向所述第一密封油混合物加入填充剂、防腐剂和阻燃剂,在35-50℃温度中充分捏合0.5-1h生成第二密封油混合物;
步骤3:向所述第二密封油混合物中加入改性纤维和改性淀粉,在40-60℃温度中充分捏合1-1.5h生成盾尾密封油脂。
优选地,所述增粘剂是通过以下方法制备的:
步骤101:用氢氧化钠将2-甲基-2-丙烯酰胺基-丙磺酸水溶液的PH值调至中性;
步骤102:向所述2-甲基-2-丙烯酰胺基-丙磺酸水溶液中依次加入十二烷基磺酸钠、偶氮二异丁腈、N-乙烯基己内酰胺和二乙烯苯,升温到40℃后充分搅拌10-30分钟得到混合液;
步骤103:向所述混合液中不断通入氮气,在60-70℃的环境下恒温水浴 5-6h得到白色沉淀;
步骤104:将所述白色沉淀使用丙酮浸泡10-30分钟,真空干燥后得到增粘剂。
优选地,所述改性纤维是通过以下方法制备的:
步骤201:将针叶木浆用水浸泡4-6h,使用打浆机疏解30-50分钟后收集小于30网目的短纤维;
步骤202:向所述短纤维中加入质量分数为2%的氢氧化钙溶液并搅拌10 分钟;
步骤203:向所述短纤维中不断通入二氧化碳,使短纤维的PH值等于7得到木浆;
步骤204:过滤掉木浆中的碳酸钙,洗净干燥后得到改性纤维。
优选地,所述改性淀粉是通过以下方法制备的:
步骤301:向质量分数为20%的淀粉溶液中依次加入0.003%的淀粉酶和0.02mmol/g的氯化钙溶液得到淀粉混合液;
步骤302:使用0.1mol/g的醋酸将所述淀粉混合液的PH调为6,同时在 60-90℃的环境下恒温水浴30-45分钟;
步骤303:将水浴后的淀粉混合液加热煮沸10-20分钟,并使用干燥机干燥后得到改性淀粉。
本发明提供的一种用于盾构机的盾尾密封油脂及其制备方法的有益效果在于:与现有技术相比,本发明提供的一种用于盾构机的盾尾密封油脂,由以下质量百分比的各组分组成:基础油10-40%、填充剂20-30%、改性纤维10-23%、润滑剂8-12%、增粘剂8-15%、阻燃剂2-6%和防腐剂1-3%。本发明通过将增粘剂加入到密封油脂中,可以使密封油脂里各个组分结合程度大大提高,进一步提高密封油脂的防水性能和抗水密封性,而且本发明还在密封油脂中加入了改性纤维,可以使密封油脂具有良好的泵送性和优异的减摩抗磨性能。
附图说明
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的改性纤维制备过程示意图;
图2为本发明实施例提供的增粘剂的紫外光谱图;
图3为本发明实施例提供的增粘剂的红外光谱图;
图4为本发明实施例提供的改性淀粉制备过程示意图。
具体实施方式
为了使本发明所要解决的技术问题、技术方案及有益效果更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
本发明的目的在于提供一种用于盾构机的盾尾密封油脂及其制备方法,旨在解决现有的密封油脂密封性能较差的问题。
为实现上述目的,本发明采用的技术方案是:一种用于盾构机的盾尾密封油脂,由以下质量百分比的各组分组成:基础油10-40%、填充剂20-30%、改性纤维10-23%、润滑剂8-12%、增粘剂8-15%、阻燃剂2-6%和防腐剂1-3%。
进一步的,本发明的基础油可以选用季戊四醇油酸酯、大豆油、异辛醇改性大豆油、蓖麻油、油酸异辛醇酯或油醇油酸酯中的一种或多种。本发明中的填充剂可以选用铜纳米颗粒。本发明的防腐剂可以选用苯基萘胺、丁羟基茴香醚、2,6-二叔丁基酚、2,6-二叔丁基对甲酚或2,4,6-三叔丁基苯酚一种或多种。
在实际应用中,本发明的填充剂是通过以下方法制备的:
将1—羟甲基苯并三氮唑、硼酸、月桂醇按照2:1:3的质量比加入到 90-100℃的水中回流搅拌1-2h得到改性硼酸酯;在实际应用中,本发明在进行回流搅拌时需要加入甲苯为带水剂,以提高反应速率。本发明也可使用十六醇或者十八醇替换月桂醇得到另一改性硼酸酯;将聚乙烯吡咯烷酮和抗坏血酸按照1:3的质量比加入到水中不断搅拌得到混合溶液;将混合溶液加热到80-90℃并向混合溶液中滴加1mol/L的硫酸铜溶液,并不断搅拌生成红色沉淀;将红色沉淀进行清洗和干燥后得到铜纳米颗粒。进一步的,本发明可使用离心机取得红色沉淀,然后使用去离子水和乙醇分别清洗红色沉淀3次,然后将清洗好的红色沉淀在干燥箱中烘干即可得到铜纳米颗粒。本发明通过向密封油脂中添加纳米级的填充剂,可以大大提高密封油脂的耐磨性能。
进一步的,本发明也可选用碳酸钙、碳酸镁、滑石粉、硫酸钡中的一种或多种,作为填充剂。
请参阅图1,在本发明实施例中,改性纤维的制备过程为:
步骤201:将针叶木浆用水浸泡4-6h,使用打浆机疏解30-50分钟后收集小于30网目的短纤维;
步骤202:向短纤维中加入质量分数为2%的氢氧化钙溶液并搅拌10分钟;
步骤203:向短纤维中不断通入二氧化碳,使短纤维的PH值等于7得到木浆;进一步的,在实际应用中,还需要使用恒温水浴锅将短纤维的温度稳定在 10℃左右。
步骤204:过滤掉木浆中的碳酸钙,洗净干燥后得到改性纤维。
由于本发明是利用氢氧化钙对纤维进行改性的,因此在通入二氧化碳的过程中,氢氧化钙会和二氧化碳反应生成碳酸钙,沉淀在细胞壁的内部或者外表面。因此改性后的纤维已经完全失去了原来的外观形态,在其表面“穿上”了一层碳酸钙。碳酸钙的具体形态,并没有很规则的形状,但是每个单一的碳酸钙微粒是纳米级的碳酸钙颗粒。这些颗粒彼此之间又相互聚集在一起,形成了表面粗糙不均的碳酸钙膜。本发明通过使用碳酸钙包覆纤维,可以进一步的提高纤维的抗磨性能。
本发明在密封油脂中加入了改性纤维,可以使密封油脂具有良好的泵送性和优异的减摩抗磨性能。
在本发明实施例中,润滑剂为二硫化钼、锂基润滑脂、钙基润滑脂、钠基脂或者钛基脂中的一种或多种。防腐剂为苯基萘胺、丁羟基茴香醚、2,6-二叔丁基酚、2,6-二叔丁基对甲酚或2,4,6-三叔丁基苯酚一种或多种。
需要说明的是,本发明中的增粘剂是通过以下方法制备的:
步骤101:用氢氧化钠将2-甲基-2-丙烯酰胺基-丙磺酸水溶液的PH值调至中性;
步骤102:向2-甲基-2-丙烯酰胺基-丙磺酸水溶液中依次加入十二烷基磺酸钠、偶氮二异丁腈、N-乙烯基己内酰胺和二乙烯苯,升温到40℃后充分搅拌 10-30分钟得到混合液;
步骤103:向混合液中不断通入氮气,在60-70℃的环境下恒温水浴5-6h 得到白色沉淀;
步骤104:将白色沉淀使用丙酮浸泡10-30分钟,真空干燥后得到增粘剂。
图3为增粘剂的红外光谱图,如图3所示,1040cm-1为SO3 -中S-O伸缩振动峰,1195cm-1为2-甲基-2-丙烯酰胺基-丙磺酸链节中的C=O键伸缩振动峰, 627cm-1为C-S伸缩振动峰;1670cm-1为N-乙烯基己内酰胺中C=O伸缩振动峰, 1540cm-1为C-N伸缩振动峰。-CH3、-CH2、-CH的弯曲振动吸收峰分别在1401cm-1, 1440cm-1,1290cm-1处;2940cm-1为-CH2伸缩振动;二乙烯苯中苯环=C-H的伸缩振动吸收峰在3190cm-1处,表明二乙烯苯被引入到共聚物中。红外光谱图结果表明,本发明所合成的增粘剂主要是由2-甲基-2-丙烯酰胺基-丙磺酸、N-乙烯基己内酰胺和二乙烯苯三者的反应生成具有交联结构的共聚物。共聚物分子间的交联结构一部分来源于二乙烯苯主要用于提高增粘剂的粘连能力,另一部分来源于N-乙烯基己内酰胺的引入,可以提高共聚物的抗温性能。
图2为增粘剂的紫外光谱图,如图2所示,在260-270nm处有一个弱吸收峰,该吸收峰为苯环的B带特征吸收峰,该吸收峰也进一步的表面本申请合成的共聚物具有交联结构。
本发明通过将增粘剂加入到密封油脂中,可以使密封油脂里各个组分结合程度大大提高,可以显著提高密封油脂的防水性能和抗水密封性。
请参阅图4,在上述实施例的基础上,本发明还在密封油脂中添加了5-8%的改性淀粉,改性淀粉是通过以下方法制备的:
步骤301:向质量分数为20%的淀粉溶液中依次加入0.003%的淀粉酶和0.02mmol/g的氯化钙溶液得到淀粉混合液;
步骤302:使用0.1mol/g的醋酸将淀粉混合液的PH调为6,同时在 60-90℃的环境下恒温水浴30-45分钟;
步骤303:将水浴后的淀粉混合液加热煮沸10-20分钟,并使用干燥机干燥后得到改性淀粉。
由于本申请中的淀粉是经过淀粉酶改性的,因此会使淀粉分子内部的糖苷键断裂,使得淀粉的结晶区和无定性区被打乱,因此改性淀粉的流动性会增加,粘度增大。本发明向密封油脂中添加改性淀粉可以使密封油脂的粘度进一步提升。
本发明还提供了一种用于盾构机的盾尾密封油脂制备方法,包括:
步骤1:将基础油、润滑剂和增粘剂加入到捏合机中,在60-90℃温度中充分捏合1-4h得到第一密封油混合物;
步骤2:向第一密封油混合物加入填充剂、防腐剂和阻燃剂,在35-50℃温度中充分捏合0.5-1h生成第二密封油混合物;
步骤3:向第二密封油混合物中加入改性纤维和改性淀粉,在40-60℃温度中充分捏合1-1.5h生成盾尾密封油脂。
本发明将基础油、改性淀粉、润滑剂、填充剂、增粘剂和改性纤维等组合物使用捏合机充分捏合得到高稳定性密封油脂,可以使密封油脂里各个组分结合程度大大提高,进而提高产品质量。
本发明公开了一种用于盾构机的盾尾密封油脂及其制备方法的有益效果在于:与现有技术相比,本发明提供的一种用于盾构机的盾尾密封油脂,由以下质量百分比的各组分组成:基础油10-40%、填充剂20-30%、有机膨润土10-15%、阻燃剂10-23%、润滑剂8-12%、增粘剂8-15%、纤维2-6%、抗氧剂1-7%。本发明通过将有机膨润土加入到密封油脂中,可以使密封油脂里各个组分结合程度大大提高,进一步提高密封油脂的防水性能和抗水密封性,而且本发明还在密封油脂中加入了润滑剂和阻燃剂,不仅使密封油脂具有良好的泵送性和优异的减摩抗磨性能,还可以提高密封油脂在高温条件下的稳定性。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种用于盾构机的盾尾密封油脂,其特征在于,由以下质量百分比的各组分组成:基础油10-40%、填充剂20-30%、改性纤维10-23%、润滑剂8-12%、增粘剂8-15%、阻燃剂2-6%和防腐剂1-3%。
2.如权利要求1所述的一种用于盾构机的盾尾密封油脂,其特征在于:所述基础油为异辛醇改性大豆油、蓖麻油、油酸异辛醇酯或油醇油酸酯中的一种或多种。
3.如权利要求2所述的一种用于盾构机的盾尾密封油脂,其特征在于:还包括改性淀粉5-8%。
4.如权利要求3所述的一种用于盾构机的盾尾密封油脂,其特征在于,所述填充剂为碳酸钙、碳酸镁、滑石粉、硫酸钡中的一种或多种。
5.如权利要求4所述的一种用于盾构机的盾尾密封油脂,其特征在于,所述润滑剂为二硫化钼、锂基润滑脂、钙基润滑脂、钠基脂或者钛基脂中的一种或多种。
6.如权利要求5所述的一种用于盾构机的盾尾密封油脂,其特征在于,所述防腐剂为苯基萘胺、丁羟基茴香醚、2,6-二叔丁基酚、2,6-二叔丁基对甲酚或2,4,6-三叔丁基苯酚一种或多种。
7.一种用于盾构机的盾尾密封油脂制备方法,其特征在于,包括:
步骤1:将基础油、润滑剂和增粘剂加入到捏合机中,在60-90℃温度中充分捏合1-4h得到第一密封油混合物;
步骤2:向所述第一密封油混合物加入填充剂、防腐剂和阻燃剂,在35-50℃温度中充分捏合0.5-1h生成第二密封油混合物;
步骤3:向所述第二密封油混合物中加入改性纤维和改性淀粉,在40-60℃温度中充分捏合1-1.5h生成盾尾密封油脂。
8.如权利要求7所述的一种用于盾构机的盾尾密封油脂制备方法,其特征在于,所述增粘剂是通过以下方法制备的:
步骤101:用氢氧化钠将2-甲基-2-丙烯酰胺基-丙磺酸水溶液的PH值调至中性;
步骤102:向所述2-甲基-2-丙烯酰胺基-丙磺酸水溶液中依次加入十二烷基磺酸钠、偶氮二异丁腈、N-乙烯基己内酰胺和二乙烯苯,升温到40℃后充分搅拌10-30分钟得到混合液;
步骤103:向所述混合液中不断通入氮气,在60-70℃的环境下恒温水浴5-6h得到白色沉淀;
步骤104:将所述白色沉淀使用丙酮浸泡10-30分钟,真空干燥后得到增粘剂。
9.如权利要求7所述的一种用于盾构机的盾尾密封油脂制备方法,其特征在于,所述改性纤维是通过以下方法制备的:
步骤201:将针叶木浆用水浸泡4-6h,使用打浆机疏解30-50分钟后收集小于30网目的短纤维;
步骤202:向所述短纤维中加入质量分数为2%的氢氧化钙溶液并搅拌10分钟;
步骤203:向所述短纤维中不断通入二氧化碳,使短纤维的PH值等于7得到木浆;
步骤204:过滤掉木浆中的碳酸钙,洗净干燥后得到改性纤维。
10.如权利要求7所述的一种用于盾构机的盾尾密封油脂制备方法,其特征在于,所述改性淀粉是通过以下方法制备的:
步骤301:向质量分数为20%的淀粉溶液中依次加入0.003%的淀粉酶和0.02mmol/g的氯化钙溶液得到淀粉混合液;
步骤302:使用0.1mol/g的醋酸将所述淀粉混合液的PH调为6,同时在60-90℃的环境下恒温水浴30-45分钟;
步骤303:将水浴后的淀粉混合液加热煮沸10-20分钟,并使用干燥机干燥后得到改性淀粉。
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