CN105813822B - 用于连接管的水溶性支撑件、其制备方法及用途 - Google Patents

用于连接管的水溶性支撑件、其制备方法及用途 Download PDF

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CN105813822B
CN105813822B CN201480054787.8A CN201480054787A CN105813822B CN 105813822 B CN105813822 B CN 105813822B CN 201480054787 A CN201480054787 A CN 201480054787A CN 105813822 B CN105813822 B CN 105813822B
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mgo
water
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CN105813822A (zh
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吉登·史科尔斯基
埃亚勒·巴尼亚
以斯拉·哈努卡
多利特·坎非
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IMI Tami Institute for Research and Development Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63—Internally supporting the article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
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    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/06—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for positioning the molten material, e.g. confining it to a desired area
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
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    • B29C66/3242—Avoiding burr formation on the inside of a tubular or hollow article
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    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
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    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
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    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8124—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the structure of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81241—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the structure of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps being porous or sintered
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
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    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
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    • B23K2101/04—Tubular or hollow articles
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Abstract

用于连接管的水溶性插入物，该水溶性插入物由包括选自KCl、NaCl及其混合物的盐；和MgO的材料制成。通过将少量水添加至所述材料，MgO与氯盐中的吸湿杂质反应，以提供具有优越性能的材料。通常通过将所述材料放置于模具中并压缩，来铸造插入物。还公开了插入物用于连接两个管，特别是由热塑性材料制成管的末端的用途。该插入物放置在相配的管的末端，其随后被焊接。在完成连接之后，使水流过所述管，以溶解所述插入物。

Description

用于连接管的水溶性支撑件、其制备方法及用途
相关申请的引用
本申请要求于2013年8月1日提交的申请号为61/860,933的美国临时申请的优先权。
技术领域
本发明涉及在管(如塑料管)的连接过程中使用的支撑件。具体地，本发明涉及由水溶性耐热材料制成的插入物，在完成连接之后，其可被冲洗掉。
背景技术
由热塑性材料制成的管的焊接通常导致在焊接附近管壁的增厚，并导致在连接点处产生唇状物或内部珠状物。壁的增厚或唇状物造成焊接点处的管的内径的减小，限制流体流过管。内部唇状物或珠也产生沉淀物，如水垢或其他不溶性物质可能聚集的点。当通过使管变硬并将管保持在合适位置的插入物支撑管时，也会产生类似问题。通常的插入物由塑料制成，通常包括供管末端抵靠的突出部或凸缘。当完成焊接之后，这些类型的插入物保持在合适的位置，从而在连接点限制了管。
已经有很多通过水溶性材料制备插入物的尝试。使用这种插入物将具有以下优点：在焊接之后，使水流过管将冲洗掉插入物，留下不受限的连接部。
英国专利号为709824的文献公开了一种对接焊热塑性管的方法，该方法包括将可溶解而不留下任何沉淀物的无毒材料插入连接点处的管的内部。公开的材料包括可溶性碳水化合物，如糖或淀粉，可向其中加入可溶性粘合剂，如白蛋白或葡萄糖，或者天然土，如具有可溶性粘合剂的Fullers'土。衬层通过挤出或模塑制成。
英国专利号为858517的文献公开了一种衬套，用于将管状金属部件的对接端焊接在一起。公开了用于制备这种衬套的两种水溶性组合物。一种包括由自由水、20-60％NaCl、60-20％MgCl2和20％Na2SiO3制成的水溶性材料，另一种包括30％KAl(SO4)2·12H2O、30％H3BO4、10％CaCO3和30％Na2SiO3。
中国专利申请公开号为10178566的文献公开了由在两个单独层中的两种材料制成的插入物，环形底层由氯化钠、氯化镁或氯化钙制成，耐热层由氧化镁或氧化钙制成。耐热层设计为通过物理压碎或破坏，然后通过流动水冲洗掉。
美国专利号为3407864的文献公开了一种制备空心铸件的方法，其中熔融金属浇铸到水溶性材料制成的可溶性盐芯制成的模具周围。在金属冷却之后，通过溶解在水中而去除盐芯。
美国专利号为4228941的文献公开了一种通过将较小的内金属管爆炸焊接至其周围的较大的外金属管的连接方法。该方法包括插入由含有NaNO2、NaNO3和KNO3的可溶性组合物制成的刚性接触主体。
美国专利申请公开号为2009/289392的文献公开了用于注塑成型的盐芯，该盐芯通过将盐放置于模具中，使热塑性材料在其周围成型，并在热塑性材料固化之后去除芯而形成。它涉及生产没有接缝的模塑件，且没有公开用于连接任意形状或内径的管或管子，或者制备其的方法。
本领域已知的用于形成水溶性插入物的组合物并不理想。例如，它们倾向于包括有机材料或环境不友好的盐。此外，很多本领域已知的组合物包括吸湿材料。包含大浓度稀释盐，如MgCl2的组合物倾向于吸收潮气，从而凝聚或破碎，由这种组合物形成的插入物倾向于脆弱易碎。用于连接两个管的插入物是人们长期想要实现但仍未实现的一个需求，该插入物防止焊接材料被引入管中，且插入物由环境友好的非吸湿无机材料制成，该材料具有能够浇铸到插入物中的理想的物理性能，能够用于焊接中的足够的耐热性，以及高的水溶性。
发明内容
本文公开的插入物设计为满足该需求。将少量的MgO和水加入含有吸湿杂质，如MgCl2和CaCl2的盐中。MgO与杂质反应，留下足够强且耐碎、但是仍然足以溶于水的材料，以用于制备用于连接管的插入物。
因此，本发明的目的在于公开一种用于连接管的水溶性插入物，所述水溶性插入物由包含以下物质的材料制成：(a)选自KCl，NaCl或其混合物的盐；和(b)MgO。在本发明的一些优选实施例中，所述水溶性插入物由(a)选自KCl，NaCl或其混合物的盐，(b)MgO，和(c)可选地，溶解增强剂构成。
在水溶性插入物的一些优选实施例中，所述MgO包括直径为2至4微米的颗粒。在水溶性插入物的一些优选实施例中，所述盐包括商业级KCl。在水溶性插入物的一些优选实施例中，所述KCl为平均尺寸约为0.5mm的颗粒形式。在水溶性插入物的一些优选实施例中，KCL：MgO的重量比为96.5:3.5至97.5:2.5。
本发明的另一个目的在于公开一种如上面任一项所限定的水溶性插入物，其中MgO的重量为所述盐中的杂质的重量的2.5至3.5倍。
本发明的另一个目的在于公开一种如上面任一项所限定的水溶性插入物，所述盐包括NaCl。在水溶性插入物的一些优选实施例中，包括0.2wt％MgCl2，0.7wt％的MgO，剩余的为NaCl。
本发明的另一个目的在于公开一种如上面任一项所限定的水溶性插入物，进一步包括溶解增强剂。在本发明的一些优选实施例中，所述溶解增强剂选自(a)NaHCO3和柠檬酸的混合物，或(b)Na2CO3和柠檬酸的混合物。
本发明的另一个目的在于公开一种如上面任一项所限定的水溶性插入物，其中所述水溶性插入物为管的形式。
本发明的另一个目的在于公开一种如上面任一项所限定的水溶性插入物，其中所述水溶性插入物为实心圆柱体的形式。
本发明的另一个目的在于公开一种用于制备用于连接管的水溶性插入物的方法，该方法包括：将选自KCl、NaCl或其混合物的盐与MgO混合；添加水，水的量足以使所述MgO与所述盐中的杂质发生反应；干燥所述添加水的步骤得到的产物；和铸造所述干燥步骤得到的所述产物，从而形成所述水溶性插入物。
本发明的另一个目的在于公开一种用于制备用于连接管的水溶性插入物的方法，该方法包括：将水添加至选自KCl、NaCl或其混合物的盐中；将MgO添加至前面步骤的产物中；干燥所述添加MgO的步骤的产物；将所述干燥步骤的产物放置在模具中；和施加压力至所述模具，直至形成水溶性插入物。在一些实施例中，所述方法还包括将MgCl2添加至所述盐的步骤。在一些实施例中，所述添加MgCl2的步骤包括添加重量分数为所述盐0.2wt％的MgCl2。
本发明的另一个目的在于公开如上述任一项所限定的方法，其中所述混合步骤包括混合重量为所述盐中的杂质的重量的2.5至3.5倍的MgO。
本发明的另一个目的在于公开如上述任一项所限定的方法，其中所述混合步骤包括混合商业级KCl和MgO，KCl:MgO的重量比为96.5:3.5至97.5:2.5。
本发明的另一个目的在于公开如上述任一项所限定的方法，其中所述混合步骤包括混合重量比为99.1:0.2:0.7的NaCl、MgCl2和MgO。
本发明的另一个目的在于公开如上述任一项所限定的方法，其中所述混合步骤包括混合直至获得均匀混合物。
本发明的另一个目的在于公开如上述任一项所限定的方法，其中所述添加水的步骤包括向所述混合步骤的产物中加入小于或等于2wt％的水。
本发明的另一个目的在于公开如上述任一项所限定的方法，其中所述干燥步骤包括在不超过120℃的温度进行干燥。
本发明的另一个目的在于公开如上述任一项所限定的方法，所述干燥步骤包括在烘箱中进行干燥。
本发明的另一个目的在于公开如上述任一项所限定的方法，还包括：粉碎由所述干燥步骤获得的块状物；和通过1mm筛筛分。
本发明的另一个目的在于公开如上述任一项所限定的方法，其中所述干燥步骤包括在转鼓烘箱中进行干燥。
在所述方法的一些优选实施例中，所述铸造步骤包括：将所述干燥步骤的所述产物放置在模具中；和向所述模具施加压力，直至形成水溶性插入物。在所述方法的一些优选实施例中，所述施加压力的步骤包括施加200至1000kg/cm2的压力。
本发明的另一个目的在于公开通过如上述任一项所述方法制备的如上述任一项所限定的水溶性插入物。
本发明的另一个目的在于公开如上述任一项所限定的水溶性插入物用于连接两个管末端的用途。
本发明的另一个目的在于公开一种用于连接两个管末端的方法，该方法包括：将如上任一项所限定的插入物插入所述管的相对末端内；和连接所述两个管，从而制得连接管。在所述方法的一些优选实施例中，还包括使水流过所述连接管，直至所述插入物溶解。在所述方法的一些优选实施例中，所述连接步骤包括对接焊接所述两个管。在所述方法的一些优选实施例中，所述两个管由热塑性材料制成。
具体实施方式
在以下说明书中，将描述本发明的各方面。基于解释目的，将展示详细细节，以完全地理解本发明。本领域技术人员可以理解，还存在细节上不同的本发明的其他实施例，它们不会影响本发明的实质特性。因此，本发明不限于本发明说明书和附图中描述的，而只是由所附权利要求限定，权利要求最广泛的解释限定本发明合适的保护范围。
当用于数字量时，术语“约”指的是相对于标准值的±20％的范围。
除非另外指出，本文中描述的组合物给定的量为重量。
商业级KCl和NaCl通常包含少量MCl2(M＝Mg、Ca、或其组合)杂质。这些MCl2盐明显比上面所述的碱金属氯盐更吸湿，从而导致最终产物倾向于聚集，然后破碎，使其不适用于在焊接时支撑管(如热塑性管)的末端的插入物。本发明人已经发现，添加少量MgO比单独KCl或NaCl能产生更适于用于在连接时支撑管的插入物的材料。在本领域已知KCl/MgO混合物相对于商业级KCl具有更低的吸水倾向，例如见美国专利号为6379414的文献。
在典型的实施例中，插入物由商业级KCl制成的材料制成，商业级KCl通常为平均尺寸约为0.5mm的颗粒形式。通常2-4微米的颗粒形式的MgO加入KCl中。在一些实施例中，加入相当于KCl的重量的2.5％至3.5％的MgO。
在一些优选实施例中，加入的MgO的量约为MCl2的重量的3倍。例如，当使用含有约0.2％MgCl2/CaCl2的商业级KCl，在优选实施例中，约加入0.7％MgO。MgO和MCl2的比例可以与这些优选实施例中使用的比例不同，只要不会明显影响最终产物的性能即可。因此，本发明人已经发现可以使用更低的比例(如约1.7)。本发明人考虑使用更高的MgO:MCl2比例，这也落入本发明的保护范围内，虽然在实际中，高的比例仅用于特殊环境中，因为相对于混合物中其他成分，MgO的更高的成本，以及当使用更高比例的MgO时产生增加的量的不溶物。
在优选实施例中，随后混合MgO和KCl，直至得到均匀的混合物，通常需要5-15分钟。将足够的水添加至(通常为2％)KCl/MgO混合物中，以使MgO与KCl中的杂质反应。
在插入物的一些实施例中，插入物由根据上述制备的材料制成，除了使用商业级NaCl代替KCl。
在插入物的一些实施例中，插入物由NaCl制成的材料制成。少量的(在典型实施例中，约为0.2wt％)MgCl2加入NaCl粉末中。在NaCl和MgCl2混合之后，再混合少量(通常约2％)水。将MgO(通常为MgCl2的重量的约3倍)加入湿混合物中，然后根据以上描述制备材料。可以用固体代替MgCl2溶液。
然后干燥湿混合物。可以通过本领域已知的任何方法进行干燥。在一些优选实施例中，在烘箱中干燥该混合物约2h，在该过程中，烘箱中的温度室温上升至120℃。当使用静态烘箱时，通常需要粉碎从烘箱中得到的块状物，在优选实施例中，随后使粉碎的块状物通过1mm的筛筛分，以得到粉末。当使用转鼓烘箱时，通过得到的干燥产物为粉末形式，从而不需要进一步粉碎或筛分。
在本发明的一些实施例中，在铸造插入物之前，将溶解增强剂，如Na2CO3和柠檬酸的混合物或NaHCO3和柠檬酸的混合物添加至材料中，以增加插入物的溶解速率。
在本发明的范围内还公开了按照如上所述制备的材料制成的插入物。将所述材料铸造成理想形状；非限制性的形状包括实心圆柱体和管。在本发明的优选实施例中，将粉末状的材料放置于理想形状的模具中，并按压成理想的形状。在典型实施例中，材料暴露至200-1000kg/cm2的压力下，直至获得理想形状的插入物。
通过这种方式制得的插入物通常在几分钟内，快速地溶解于流动水中，完全溶解大概用1h。
在本发明的范围内还公开了如上所述的插入物在连接管中的用途。
在本发明的范围内还公开了用于连接管末端的方法。将如上所述的插入物放置在待连接的管的末端内，插入物具有与管末端的内径匹配的外径。然后通过本领域已知的方法，如对接焊接连接所述管。然后在水流穿过连接管的作用下冲洗插入物，从而留下单独的连接管，在管内径处不会有任何限制，在管内部也不会残留任何焊接材料。该方法特别用于连接由热塑性材料制成的管。插入物足够坚硬，以支撑材料，并足够耐热，从而在焊接过程的条件下不会变形或断开。

Claims (57)

1.用于连接管的水溶性插入物，所述水溶性插入物由包含选自KCl、NaCl或其混合物的盐的材料制成，
其特征在于，所述水溶性插入物包括吸湿杂质，所述吸湿杂质包括选自由MgCl2和CaCl2组成的组中的至少一种物质；和
所述水溶性插入物包括MgO，MgO的量足以与所述吸湿杂质反应。
2.根据权利要求1所述的水溶性插入物，其特征在于，所述MgO包括直径为2至4微米的颗粒。
3.根据权利要求1所述的水溶性插入物，其特征在于，所述盐包括商业级KCl。
4.根据权利要求3所述的水溶性插入物，其特征在于，所述KCl为平均尺寸约0.5mm的颗粒形式。
5.根据权利要求3所述的水溶性插入物，其特征在于，KCL：MgO的重量比为96.5:3.5至97.5:2.5。
6.根据权利要求1所述的水溶性插入物，其特征在于，在所述盐中，MgO的重量为杂质的重量的2.5至3.5倍。
7.根据权利要求1所述的水溶性插入物，其特征在于，所述盐包括NaCl。
8.根据权利要求7所述的水溶性插入物，其特征在于，包括0.2wt％的MgCl2，0.7wt％的MgO，剩余的为NaCl。
9.根据权利要求1所述的水溶性插入物，其特征在于，所述材料包括溶解增强剂。
10.根据权利要求9所述的水溶性插入物，其特征在于，所述溶解增强剂选自(a)NaHCO3和柠檬酸的混合物，和(b)Na2CO3和柠檬酸的混合物。
11.根据权利要求1所述的水溶性插入物，其特征在于，所述水溶性插入物为管的形式。
12.根据权利要求1所述的水溶性插入物，其特征在于，所述水溶性插入物为实心圆柱体的形式。
13.根据权利要求1所述的水溶性插入物，其特征在于，所述水溶性插入物由以下物质组成的材料制得：
选自KCl、NaCl或其任意组合的盐；
吸湿杂质，其包括选自由MgCl2和CaCl2组成的组中的物质；
MgO，其量足以与所述吸湿杂质反应；和
可选地，溶解增强剂。
14.根据权利要求13所述的水溶性插入物，其特征在于，所述MgO包括直径为2至4微米的颗粒。
15.根据权利要求13所述的水溶性插入物，其特征在于，所述盐为商业级KCl。
16.根据权利要求15所述的水溶性插入物，其特征在于，所述KCl为平均尺寸约0.5mm的颗粒形式。
17.根据权利要求13所述的水溶性插入物，其特征在于，KCL：MgO的重量比为96.5:3.5至97.5:2.5。
18.根据权利要求13所述的水溶性插入物，其特征在于，所述盐中MgO的重量为杂质重量的2.5至3.5倍。
19.根据权利要求13所述的水溶性插入物，其特征在于，所述盐为NaCl。
20.根据权利要求13所述的水溶性插入物，其特征在于，所述溶解增强剂选自(a)NaHCO3和柠檬酸的混合物，和(b)Na2CO3和柠檬酸的混合物。
21.根据权利要求13所述的水溶性插入物，其特征在于，所述水溶性插入物为管的形式。
22.根据权利要求13所述的水溶性插入物，其特征在于，所述水溶性插入物为实心圆柱体的形式。
23.制备用于连接管的水溶性插入物的方法，该方法包括：
将选自KCl、NaCl或其混合物的盐与足以与所述盐中的吸湿杂质反应的一定量的MgO混合；
添加水，水的量足以使所述MgO与所述盐中的吸湿杂质发生反应；
干燥所述添加水的步骤得到的产物；和
铸造所述干燥步骤得到的产物，从而形成所述水溶性插入物。
24.根据权利要求23所述的方法，其特征在于，所述混合步骤包括混合重量为所述盐中的杂质的重量的2.5至3.5倍的MgO。
25.根据权利要求23所述的方法，其特征在于，所述混合步骤包括混合商业级KCl和MgO，KCl:MgO的重量比为96.5:3.5至97.5:2.5。
26.根据权利要求23所述的方法，其特征在于，所述混合步骤包括混合重量比为99.1:0.2:0.7的NaCl、MgCl2和MgO。
27.根据权利要求23所述的方法，其特征在于，所述混合步骤包括混合直至获得均匀混合物。
28.根据权利要求23所述的方法，其特征在于，所述添加水的步骤包括向所述混合步骤的产物中加入小于或等于2wt％的水。
29.根据权利要求23所述的方法，其特征在于，所述干燥步骤包括在不超过120℃的温度进行干燥。
30.根据权利要求23所述的方法，其特征在于，所述干燥步骤包括在烘箱中进行干燥。
31.根据权利要求23所述的方法，还包括：
粉碎经过所述干燥步骤后获得的块状物；和
通过1mm筛进行筛分。
32.根据权利要求23所述的方法，其特征在于，所述干燥步骤包括在转鼓烘箱中进行干燥。
33.根据权利要求23所述的方法，进一步包括在所述铸造步骤之前添加溶解增强剂的步骤。
34.根据权利要求33所述的方法，其特征在于，所述添加溶解增强剂的步骤包括添加选自(a)NaHCO3和柠檬酸的混合物，和(b)Na2CO3和柠檬酸的混合物的溶解增强剂。
35.根据权利要求23所述的方法，所述铸造步骤包括：
将所述干燥步骤的产物放置在模具中；和
向所述模具施加压力，直至形成水溶性插入物。
36.根据权利要求35所述的方法，其特征在于，所述施加压力的步骤包括施加200至1000kg/cm2的压力。
37.一种制备用于连接管的水溶性插入物的方法，该方法包括：
添加水至选自KCl、NaCl及其混合物的盐中；
添加足以与所述盐中的吸湿杂质反应的一定量的MgO至前面步骤的产物中；
干燥所述添加MgO的步骤的产物；和
铸造所述干燥步骤的产物，所述铸造步骤包括：
将所述干燥步骤的产物放置在模具中；和
向所述模具施加压力，直至形成水溶性插入物。
38.根据权利要求37所述的方法，其特征在于，所述混合步骤包括混合重量为所述盐中的杂质的重量的2.5至3.5倍的MgO。
39.根据权利要求37所述的方法，其特征在于，所述混合步骤包括将商业级KCl与MgO以KCl:MgO的重量比为96.5:3.5至97.5:2.5混合。
40.根据权利要求37所述的方法，其特征在于，进一步包括添加MgCl2至所述盐的步骤。
41.根据权利要求40所述的方法，其特征在于，所述添加MgCl2的步骤包括向所述盐中添加0.2wt％的MgCl2。
42.根据权利要求37所述的方法，其特征在于，所述添加MgO的步骤包括添加MgO直至获得均匀的混合物。
43.根据权利要求37所述的方法，其特征在于，所述添加水的步骤包括向所述混合步骤的产物中加入小于或等于2wt％的水。
44.根据权利要求37所述的方法，其特征在于，所述干燥步骤包括在不超过120℃的温度进行干燥。
45.根据权利要求37所述的方法，其特征在于，所述干燥步骤包括在烘箱中进行干燥。
46.根据权利要求37所述的方法，还包括：
粉碎经过所述干燥步骤后获得的块状物；和
通过1mm筛进行筛分。
47.根据权利要求37所述的方法，其特征在于，所述干燥步骤包括在转鼓烘箱中进行干燥。
48.根据权利要求37所述的方法，其特征在于，包括在所述铸造步骤之前添加溶解增强剂的步骤。
49.根据权利要求48所述的方法，其特征在于，所述添加溶解增强剂的步骤包括添加选自(a)NaHCO3和柠檬酸的混合物，和(b)Na2CO3和柠檬酸的混合物的溶解增强剂。
50.根据权利要求37所述的方法，其特征在于，所述施加压力的步骤包括施加200至1000kg/cm2的压力。
51.用根据权利要求23所述的方法制备的根据权利要求1所述的水溶性插入物。
52.用根据权利要求37所述的方法制备的根据权利要求1所述的水溶性插入物。
53.根据权利要求1所述的水溶性插入物在连接两个管的末端中的用途。
54.一种用于连接两个管的相对末端的方法，包括：
将权利要求1所述的插入物插入到所述管的相对末端内；和
连接所述两个管，从而制得连接管。
55.根据权利要求54所述的方法，还包括使水流过所述连接管，直至所述插入物溶解。
56.根据权利要求54所述的方法，其特征在于，所述连接步骤包括对接焊接所述两个管。
57.根据权利要求54所述的方法，其特征在于，所述两个管由热塑性材料制成。
CN201480054787.8A 2013-08-01 2014-07-29 用于连接管的水溶性支撑件、其制备方法及用途 Active CN105813822B (zh)

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