CN104075038B - 无机凝胶-钢预应力复合管 - Google Patents
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Abstract
无机凝胶-钢预应力复合管,解决了现有复合管抗拉、抗弯、抗冲击性能不强的问题,采用的技术方案是:结构中包括内金属管、外金属管及在内、外金属管两端设置的法兰,内外管壁之间充填无机凝胶,所述结构中还包括连接内、外金属管端和预应力筋的法兰,预应力筋借助锁紧部件与法兰构成预应力调整机构。本发明的有益效果是:安装方便,重量轻、抗弯、抗压、抗冲击抗形变能力强以及具有优良的阻燃抗静电性能,能够广泛用于煤矿、石油天然气的开采及输送等诸多领域。
Description
技术领域
本发明涉及一种用于煤矿井下等易燃易爆场所的运输管道,尤其是一种无机凝胶-钢预应力复合管。
背景技术
煤矿、石油天然气开采及输送等很多领域均需要不同口径管道运输气体、液体和流化固体,这些领域不仅要求管道具有常规的力学性能(如抗弯、抗拉、抗冲击),还需要具有优良的化学性能(如阻燃、抗静电、耐腐蚀性能)。
现有金属管道在潮湿的环境中极易腐蚀而失去使用价值,而且普通金属管在保证力学指标条件下管壁较厚、重量较大,大大增加了安装的难度,使得主张以金属结构为主体的技术路线的执行遇到了很大困难,特别是大口径管道在煤矿井下的使用。
公告为CN202158285U的中国专利公开了一种加强筋型钢塑复合缠绕管,其基本构思是借助“Π”型钢带和卷绕粘接成型工艺,在钢带的内外表面包覆塑料层形成薄壁加强型复合钢管,从而实现减轻重量和保证力学指标的双重效果。从径向力学指标上看是比较完美。但是,仅依靠塑料热熔胶连接轴向各个单元使得轴向力学指标大降等级,包括管体整体抗弯强度和抗拉强度。
申请号为201120387804.3的中国专利公开了一种空心纤维-钢复合管混凝土组合结构,其由纤维-钢复合管、混凝土或钢筋混凝土和内钢管由外向内共同构成,该结构承载力高、刚度好,延性好,抗震性能优良,适合恶劣环境下的大尺寸结构构件。但是该复合结构存在以下技术问题:混凝土虽然具有较强的抗压强度,但是抗拉强度低、抗裂性能差、抵抗形变性能差,材料的脆性明显,与钢复合管和内钢管的抗形变能力相差较大,因此,即使在较低的拉伸变形时、混凝土或钢筋混凝土层极易发生开裂,导致钢复合管、内钢管与混凝土之间的结合力较小,三层之间易发生剥离从而丧失复合管材的抗拉、抗爆裂性能。
发明内容
本发明要解决现有复合管抗拉、抗形变、抗冲击性能不强的问题,设计了一种无机凝胶-钢预应力复合管,该复合管内外金属管均是采用锁边工艺或者螺旋焊接工艺加工而成的带有螺旋筋的薄壁管且内外金属管与法兰形成的空腔间填充有无机凝胶,法兰间还连接有预应力筋以提高复合管的抗拉、抗形变、抗冲击性能。
本发明采用的技术方案是:无机凝胶-钢预应力复合管,结构中包括内金属管、外金属管及在内、外金属管两端设置的法兰,内外管壁之间充填无机凝胶,其关键在于:所述结构中还包括连接内、外金属管端和法兰的预应力筋,预应力筋借助锁紧部件与法兰构成预应力调整机构。
本发明在复合管结构中设计了预应力筋,预应力筋将内外金属管两端的法兰连接在一起,在填充无机凝胶时调整预应力筋,使预应力筋受拉力,待无机凝胶复合材料填充并凝固后解除预应力筋受到的拉力,预应力筋收缩从而使凝固后的无机凝胶复合材料受到压力从而提高复合管的抗压性能,而且预应力筋的设置大大提高了整个复合管的抗拉和抗形变、抗冲击性能。内、外金属管两端设置的法兰不仅可以使内、外金属管同轴心设置还便于对预应力筋施加预应力,法兰与金属管的一体化方便了复合管的安装。复合管的内、外壁还包覆有阻燃、抗静电涂层或耐磨涂料,使该复合管具有优良的阻燃抗静电性能。
本发明的有益效果是:一、金属管两端设置了法兰,方便安装;二、两端法兰之间设有预应力筋,大大提高了复合管的抗拉、抗形变、抗冲击性能;三、内金属管的内壁、外金属管的外壁间设有阻燃、抗静电涂层或耐磨涂料,使该复合管有优良的阻燃抗静电性能;四、内、外金属管为带有螺旋筋的薄壁钢管,减轻了复合管的重量。
下面结合附图对本发明进行详细说明。
附图说明
图1是本发明无机凝胶-钢预应力复合管的剖视图;
图2是图1中法兰的剖视图。
附图中,1是内金属管,2是外金属管,3是法兰,3-1是环形凹槽,3-2是预应力筋孔,3-3是内端面,4是预应力筋,5是圆环盘片,6是无机凝胶,7是塑料管。
具体实施方式
参看附图1,无机凝胶-钢预应力复合管,结构中包括内金属管1、外金属管2及在内、外金属管两端设置的法兰3,内外管壁之间充填无机凝胶6,其特征在于:所述结构中还包括连接内、外金属管端和法兰3的预应力筋4,预应力筋4借助锁紧部件与法兰3构成预应力调整机构。
所述法兰3外端面上设置有环形凹槽3-1,环形凹槽3-1槽底设置有预应力筋孔3-2,预应力筋孔与管径配套设置3~6个。设置环形凹槽3-1,使锁紧螺母的安装在环形凹槽3-1,从而方便复合管的安装。
所述法兰3的内端面3-3凹于法兰安装面。这样设计是为了内金属管1借助翻边工艺与内端面3-3形成配合,从而更好的固定内金属管1,内金属管1还可以设置焊接工艺孔,将内金属管1与法兰3进行焊接固定。
所述锁紧部件包括穿透法兰3底端面的预应力钢筋端头螺纹、配套调整螺母、锁紧螺母、圆环盘片5。设置圆环盘片5,可以减小调整螺母、锁紧螺母对法兰3的应力集中,提高复合管的稳定性。
所述预应力筋4套于塑料管7内。这样的设置可以防止预应力筋4直接与无机凝胶6接触。塑料管7内有防锈油脂。
所述内金属管1和外金属管2为薄壁钢管、或镀锌卷边管、其管壁厚度为0.4-3mm,配套外径为48~1000mm。
所述内金属管1和外金属管2是借助锁边工艺或螺旋焊接工艺形成的带有螺旋筋的薄壁钢管,其中内金属管1内壁带有螺旋筋,外金属管2外壁带有螺旋筋,内、外金属管的螺旋筋螺旋方向相同或相反。
在内金属管1的内壁和外金属管2的外壁还设有阻燃、抗静电涂层或耐磨涂料,其厚度不小于螺旋筋的厚度。这样可以使本复合管具有优良的阻燃抗静电性能。也可使管内的介质更好地流通。
所述无机凝胶6为硫铝酸盐水泥为基料加配有机改性剂和无机填料,所述有机改性剂为聚丙烯酸酯乳液、水性环氧树脂或丁苯乳液,所述无机填料为石墨晶须、短切碳纤维、短切玄武岩纤维或炭黑。
本发明在具体使用时:将内、外金属管定位在法兰3上并安装预应力筋4及锁紧螺母、调整螺母。向内、外金属管与法兰3形成的腔中填充无机凝胶6。预应力筋4连接在拉力机上,拉力机拉伸预应力筋4的同时调整锁紧螺母使预应力筋4在两法兰3间受到一定的拉应力直至无机凝胶6凝固。释放拉力机的拉力并调整锁紧螺母,这样提高了整个复合管的抗压性能。而预应力筋4的一直存在大大提高了复合管的抗弯、抗拉、抗冲击性能。
Claims (9)
1.无机凝胶-钢预应力复合管,结构中包括内金属管(1)、外金属管(2)及在内、外金属管两端设置的法兰(3),内外管壁之间充填无机凝胶(6),其特征在于:所述结构中还包括连接内、外金属管端和法兰(3)的预应力筋(4),预应力筋(4)位于内、外金属管间并借助锁紧部件与法兰(3)构成预应力调整机构;所述法兰(3)外端面上设置有环形凹槽(3-1),环形凹槽(3-1)槽底设置有预应力筋孔(3-2)。
2.根据权利要求1所述的无机凝胶-钢预应力复合管,其特征在于:预应力筋孔与管径配套设置3~6个。
3.根据权利要求1所述的无机凝胶-钢预应力复合管,其特征在于:所述法兰(3)的内端面(3-3)凹于法兰外端面。
4.根据权利要求1所述的无机凝胶-钢预应力复合管,其特征在于:所述锁紧部件包括穿透法兰(3)中环形凹槽(3-1)的槽底面的预应力钢筋端头螺纹、配套调整螺母、锁紧螺母、圆环盘片(5)。
5.根据权利要求1所述的无机凝胶-钢预应力复合管,其特征在于:所述预应力筋(4)套于塑料管(7)内。
6.根据权利要求1所述的无机凝胶-钢预应力复合管,其特征在于:所述内金属管(1)和外金属管(2)为薄壁钢管、或镀锌卷边管、其管壁厚度为0.4-3mm,配套外径为48~1000mm。
7.根据权利要求6所述的无机凝胶-钢预应力复合管,其特征在于:所述内金属管(1)和外金属管(2)是借助锁边工艺或螺旋焊接工艺形成的带有螺旋筋的薄壁钢管,其中内金属管(1)内壁带有螺旋筋,外金属管(2)外壁带有螺旋筋,内、外金属管的螺旋筋螺旋方向相同或相反。
8.根据权利要求7所述的无机凝胶-钢预应力复合管,其特征在于:在内金属管(1)的内壁和外金属管(2)的外壁还设有阻燃、抗静电涂层或耐磨涂料,其厚度不小于螺旋筋的厚度。
9.根据权利要求1所述的无机凝胶-钢预应力复合管,其特征在于:所述无机凝胶(6)为硫铝酸盐水泥为基料加配有机改性剂和无机填料,所述有机改性剂为聚丙烯酸酯乳液、水性环氧树脂或丁苯乳液,所述无机填料为石墨晶须、短切碳纤维、短切玄武岩纤维或炭黑。
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CN202992423U (zh) * | 2012-12-26 | 2013-06-12 | 伦慧东 | 螺旋筋增强的阻燃抗静电薄壁钢塑复合管 |
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GB2252142A (en) * | 1990-12-12 | 1992-07-29 | Kajima Corp | "junction structure between steel member and structural member" |
CN202992423U (zh) * | 2012-12-26 | 2013-06-12 | 伦慧东 | 螺旋筋增强的阻燃抗静电薄壁钢塑复合管 |
CN203082383U (zh) * | 2012-12-26 | 2013-07-24 | 伦慧东 | 纤维增强阻燃抗静电薄壁钢塑复合管 |
CN203007817U (zh) * | 2012-12-27 | 2013-06-19 | 长安大学 | 内部通长布设双重加劲结构的scs方形钢管混凝土结构 |
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Effective date of registration: 20220120 Address after: 063700 No. 5 Alishan street, Luan county economic and Technological Development Zone, Tangshan City, Hebei Province Patentee after: TANGSHAN JIAJI COMPOSITE PIPE Corp.,Ltd. Address before: 063700 No. 5 Alishan street, Luan county economic and Technological Development Zone, Tangshan City, Hebei Province Patentee before: Lun Huidong |