CN117489970A - 罐 - Google Patents
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- CN117489970A CN117489970A CN202310712870.0A CN202310712870A CN117489970A CN 117489970 A CN117489970 A CN 117489970A CN 202310712870 A CN202310712870 A CN 202310712870A CN 117489970 A CN117489970 A CN 117489970A
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Classifications
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- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
本发明的罐具备衬里、具有连通孔的接头、内插于连通孔的下端部的金属筒体、以及插入于连通孔且其下端部插入于金属筒体的阀。衬里具有绕入于连通孔的内部而与金属筒体的外周面相接触的绕入部。在绕入部的内周面与金属筒体的外周面之间沿周向配置有第一O型圈。在金属筒体的内周面与阀的下端部的外周面之间沿周向配置有第二O型圈。
Description
技术领域
本发明涉及罐。
背景技术
以往,作为这样的技术领域,例如存在记载于日本特开2019-116926的技术领域。日本特开2019-116926所记载的罐具备:树脂制的衬里,具有在内部存积气体的存积空间和与该存积空间连通的开口部;加强层,形成于衬里的外周面;接头,安装于衬里的开口部;以及阀,插入于接头。在具有这样的构造的罐中,为了防止所存积的气体的泄漏,采用在接头与衬里之间配置O型圈的密封构造。
然而,在上述的罐中,需要在接头设置用于嵌入O型圈的周槽,因此接头的构造变得复杂。另外,最近,为了实现作业性的提高和在加强层形成时防止环氧树脂对接头与衬里之间的侵入,关注将树脂制的衬里与接头一体成型这一情况。但是,在将衬里与接头一体成型的情况下,若在接头设置用于嵌入O型圈的周槽,则接头的构造变得更复杂。
发明内容
本发明提供一种能够以简易的构造来确保密封性的罐。
本发明所涉及的一个形态提供一种罐。该罐是具有存积气体的存积空间的筒状的罐,在沿着上述罐的轴向将上述罐的外侧作为上并将上述罐的内部侧作为下时,其具备:树脂制的衬里,设置有上述存积空间;金属制的接头,具有构成为与上述存积空间连通的连通孔,并与上述衬里一体成型;金属筒体,内插于上述接头的上述连通孔的下端部,并与上述连通孔同轴配置;以及阀,以闭塞上述接头的方式插入于上述连通孔,其下端部还插入于上述金属筒体,上述衬里具有绕入部,该绕入部构成为从上述接头的底部绕入于上述连通孔的内部并与上述金属筒体的外周面相接触,在上述绕入部的内周面与上述金属筒体的外周面之间,沿着周向配置有第一O型圈,在上述金属筒体的内周面与上述阀的下端部的外周面之间,沿着周向配置有第二O型圈。
在上述形态的罐中,对一体成型的衬里和接头,使用内插于接头的连通孔的下端部的金属筒体,在该金属筒体的外周面与衬里的绕入部的内周面之间沿着周向配置第一O型圈来确保金属筒体与衬里之间的密封性,在金属筒体的内周面与插入于该金属筒体的阀的下端部的外周面之间沿着周向配置第二O型圈来确保金属筒体与阀之间的密封性。通过这样使用金属筒体来分别实现金属筒体与衬里之间的密封性、金属筒体与阀之间的密封性,从而无需像以往那样在接头设置用于嵌入O型圈的周槽,因此能够以简易的构造确保罐的密封性。
也可以构成为:在上述形态的罐的基础上,在上述罐的轴向上,上述第一O型圈和上述第二O型圈位于相同的高度。这样,通过调整第一O型圈和第二O型圈的各自的挤压力一致在相同的高度,能够增强挤压力,因此能够提高金属筒体与衬里之间的密封性、和金属筒体与阀之间的密封性。
也可以构成为:在上述形态的罐的基础上,上述金属筒体通过螺纹结合固定于上述接头的上述连通孔的下端部。这样,与压入等方法相比,能够容易并且可靠地将金属筒体内插并固定于接头的连通孔的下端部。另外,由此,将金属筒体可装卸地固定于连通孔的下端部,因此即使在向连通孔的插入失败的情况下,也能够取下并更换金属筒体。
也可以构成为:在上述形态的罐的基础上,在上述金属筒体的外周面设置有第一外周槽。上述第一O型圈也可以配置于上述第一外周槽。也可以在上述阀的下端部的外周面设置有第二外周槽。上述第二O型圈也可以配置于上述第二外周槽。
根据本发明,能够以简易的构造确保罐的密封性。
以下参考附图,对本发明的示例性实施例的特征、优点、以及技术和工业意义进行描述,在附图中,相同的附图标记表示相同的元件。
附图说明
图1是表示实施方式所涉及的罐的剖视图。
图2是表示图1的II部分的放大剖视图。
图3是表示图2的III部分的放大剖视图。
具体实施方式
以下,参照附图对本发明所涉及的罐的实施方式进行说明。在下述的说明中,举出将罐搭载于燃料电池车辆来向内部填充高压的氢气的例子,但是能够向罐填充的气体并不限定于氢气,也可以是CNG(压缩天然气体)等各压缩气体、LNG(液化天然气体)、LPG(液化石油气体)等各种液化气体等。
图1是表示实施方式所涉及的罐的剖视图,图2是表示图1的II部分的放大剖视图,图3是表示图2的III部分的放大剖视图。如图1所示,本实施方式的罐1是两端呈圆弧而形成圆顶状的大致圆筒形状的高压气体储藏容器,并具备:衬里10,具有阻气性;加强层20,形成为覆盖衬里10的外周面;接头30,安装于罐1的一端部;以及阀40,闭塞接头30。
衬里10是具有存积高压氢的存积空间2的中空的容器,由具有对氢气的阻气性的树脂材料形成。该衬里10由圆筒状的筒体部11、和设置于该筒体部11的轴向(即,罐1的轴L方向)的左右两侧的一对圆顶部(第一圆顶部12、第二圆顶部13)构成。筒体部11沿着罐1的轴L方向以规定的长度延伸。第一圆顶部12和第二圆顶部13连续地形成于筒体部11的左右两侧,并以随着远离筒体部11而分别缩径的方式形成半球状。
在一对圆顶部中的一方(在本实施方式中,为第一圆顶部12)的顶部形成开口部,在该开口部插入有与衬里10一体成型的接头30。另一方面,在第二圆顶部13,未形成开口部。此外,第二圆顶部13也可以与第一圆顶部12相同地具有供接头30插入的开口部。
例如通过使用聚乙烯、尼龙等树脂材料并通过注射模塑成型、吹塑成型等分别形成筒体分割体、第一圆顶分割体以及第二圆顶分割体,并将这些分割体连结,从而形成具有以上的构造的衬里10。
加强层20具有加强衬里10来使罐1的刚性、耐压性等机械强度提高的功能,通过用长丝缠绕(FW)法将多个纤维强化树脂卷绕于衬里10的外周面而形成。纤维强化树脂例如通过在将直径为数μm左右的纤维集束而构成的纤维束浸入热固化性树脂而形成。作为纤维,例如能够举出碳纤维、玻璃纤维、芳族聚酰胺纤维、氧化铝纤维、硼纤维、钢纤维、PBO纤维、天然纤维、或者高强度聚乙烯纤维等强化纤维,特别是从轻型性和机械强度等观点出发,优选使用碳纤维。
作为热固化性树脂,能够举出环氧树脂、以乙烯基酯树脂为代表的改性环氧树脂、酚醛树脂、密胺树脂、尿素树脂、不饱和聚酯树脂、醇酸树脂、聚氨基甲酸乙酯树脂、热固化性聚酰亚胺树脂。此外,作为浸渍于纤维束的树脂,也可以使用热塑性树脂。
接头30是将不锈钢、铝合金等金属材料加工为规定形状的部件。该接头30具有沿着罐1的轴L方向延伸的圆筒状的接头主体部31、和与该接头主体部31连结并且向罐1的径向突出的凸缘部32。在接头主体部31的内部设置有与罐1的存积空间2连通的连通孔33。连通孔33呈大致圆柱形。在接头主体部31的内周壁(即,形成连通孔33的部分),分别形成有用于与阀40螺纹结合的第一内螺纹部34、和用于与金属筒体50(进行后述)螺纹结合的第二内螺纹部35。
接下来,基于图2和图3对衬里10的第一圆顶部12、接头30、以及阀40详细地进行说明。在以下的说明中,如图2所示,沿着罐1的轴L方向,将罐1的外侧作为上,将罐1的内部侧作为下。
在本实施方式中,为了提高一体成型(更具体而言,嵌件成型)的接头30与衬里10的连结强度,第一圆顶部12的顶部形成为仿照接头30的凸缘部32的形状。具体而言,第一圆顶部12的顶部具有:上方按压部121,以包围凸缘部32的方式延伸至凸缘部32的上方并从上方按压凸缘部32;侧下方支承部122,从凸缘部32的侧壁延伸至底部(即,接头30的底部)并从侧方和下方支承凸缘部32;以及回绕部123,与侧下方支承部122连结,并且从接头30的底部回绕于接头30的连通孔33的内部。
如图2和图3所示,衬里10的回绕部123在罐1的轴L方向上并不是遍及连通孔33的全长而形成,而是延伸至第二内螺纹部35的下端,以避免阻碍接头30的第二内螺纹部35与金属筒体50的外螺纹部51(进行后述)的螺纹结合。
另外,回绕部123在罐1的径向上优选其厚度是0.5mm~3mm,更优选是1mm~2mm。这是考虑了在确保接头30与阀40的紧固力的前提下兼得衬里10与接头30的连结强度、和金属筒体50的机械强度的结果。即,若在不改变阀40的外径的前提下使衬里10的回绕部123变厚,则能够提高衬里10与接头30的连结强度,但是与其对应地金属筒体50变薄,因此金属筒体50的机械强度变小。另一方面,若使金属筒体50变厚,则回绕部123变薄,影响到衬里10与接头30的连结强度。在考虑到兼得衬里10与接头30的连结强度、和金属筒体50的机械强度的情况下,优选回绕部123的厚度是上述的范围。
具有这样的构造的接头30在与罐1的轴L同轴地配置连通孔33的轴线的状态下例如通过嵌件成型而无缝隙地与衬里10的第一圆顶部12紧贴地连结。
另外,在接头30的连通孔33的下端部内插有圆筒状的金属筒体50。如图3所示,在金属筒体50的上端部的外周壁形成有用于与接头30的第二内螺纹部35螺纹结合的外螺纹部51。金属筒体50在与连通孔33同轴地配置的状态下通过外螺纹部51与接头30的第二内螺纹部35的螺纹结合而固定于接头30的连通孔33的下端部。
此外,优选罐1的轴L方向上的金属筒体50的长度形成为:在固定于接头30的连通孔33的下端部的状态下,从衬里10的底面(更详细而言,从侧下方支承部122的底面)突出至少5mm以上。这样,能够容易地进行金属筒体50的外螺纹部51与接头30的第二内螺纹部35的螺纹结合作业。
另外,如图2和图3所示,在固定于连通孔33的下端部的状态下,金属筒体50与第一圆顶部12的回绕部123的内周面相接触。而且,在金属筒体50的外周面与回绕部123的内周面之间沿着周向配置有第一O型圈60。
具体而言,在金属筒体50的外周壁设置有外周槽52(第一外周槽)。在外周槽52嵌入有将衬里10与金属筒体50之间密封的第一O型圈60。并且,在该外周槽52嵌入有配置于比第一O型圈60靠罐1的外侧的位置的第一垫圈61。第一O型圈60和第一垫圈61在紧贴的状态下配置于外周槽52。
第一O型圈60是具有大致圆形的剖面形状的环状的弹性部件,被用于提高衬里10与金属筒体50之间的密封性(换言之,气密性)。该第一O型圈60在将金属筒体50内插于接头30的连通孔33的下端部时挤压于邻接的衬里10的回绕部123的内周面,由此将回绕部123的内周面与金属筒体50的外周面之间密封。第一O型圈60例如由聚四氟乙烯(PTFE)等树脂形成。
第一垫圈61是具有剖面梯形状的环状的部件。第一垫圈61在外周槽52相对于第一O型圈60配置于轴L方向的上侧(即,罐1的外侧),抑制第一O型圈60向上侧的移动。该第一垫圈61例如由摩擦系数比第一O型圈60小、并且不易弹性变形的氟类树脂材料或者尼龙46等硬质树脂材料形成。
此外,在本实施方式中,优选用于金属筒体50的金属材料与用于接头30的金属材料不同。例如金属筒体50使用不锈钢(例如SUS316L),接头30使用铝合金。这样,能够确保金属筒体50的强度。
另一方面,阀40是用于对存积空间2填充和排出氢气的部件,由不锈钢、铝合金等金属材料形成。如图2所示,阀40以闭塞接头30的方式插入于连通孔33,其下端部41进一步插入于金属筒体50。
该阀40具有:上述下端部41,能够插入于接头30的连通孔33的一部分和金属筒体50的一部分;顶板部43,能够与接头30的上端抵接;以及主体部42,配置于下端部41与顶板部43之间并能够插入于接头30的连通孔33。而且,在主体部42的外周面的一部分设置有用于与在接头主体部31的内周壁形成的上述第一内螺纹部34螺纹结合的外螺纹部44。
另外,在阀40的下端部41的外周面与金属筒体50的内周面之间,沿着周向配置有第二O型圈62。具体而言,在阀40的下端部41的外周壁设置有外周槽45(第二外周槽)。在外周槽45嵌入有将阀40与金属筒体50之间密封的第二O型圈62。并且,在该外周槽45嵌入有配置于比第二O型圈62靠罐1的外侧的位置的第二垫圈63。而且,第二O型圈62和第二垫圈63在紧密接触的状态下配置于外周槽45。
第二O型圈62是具有大致圆形的剖面形状的环状的弹性部件,被用于提高阀40与金属筒体50之间的密封性(换言之,气密性)。该第二O型圈62在将阀40插入于接头30的连通孔33和金属筒体50时挤压于金属筒体50的内周面,由此将金属筒体50的内周面与阀40的下端部41的外周面之间密封。第二O型圈62例如由聚四氟乙烯(PTFE)等树脂形成。
第二垫圈63是具有剖面梯形状的环状的部件。第二垫圈63在外周槽45相对于第二O型圈62配置于轴L方向的上侧(即,罐1的外侧),抑制第二O型圈62向上侧的移动。第二垫圈63例如由摩擦系数比第二O型圈62小、并且不易弹性变形的氟类树脂材料或者尼龙46等硬质树脂材料形成。
此外,在罐1的轴L方向上,第一O型圈60和第二O型圈62位于相同的高度。并且,在罐1的轴L方向上,第一垫圈61和第二垫圈63也位于相同的高度。
在本实施方式的罐1中,对于一体成型的衬里10和接头30,使用内插于接头30的连通孔33的下端部的金属筒体50,在该金属筒体50的外周面与衬里10的回绕部123的内周面之间配置第一O型圈60来确保金属筒体50与衬里10之间的密封性,在金属筒体50的内周面与插入于该金属筒体50的阀40的下端部41的外周面之间配置第二O型圈62来确保金属筒体50与阀40之间的密封性。通过这样使用金属筒体50来分别实现金属筒体50与衬里10之间的密封性、金属筒体50与阀40之间的密封性,从而无需在以往的接头设置用于嵌入O型圈的周槽,因此能够给以简易的构造确保罐1的密封性。
另外,衬里10与接头30一体成型,因此没有组装分别独立地制成的衬里10和接头30的作业,因此能够提高制造罐1的作业性,并且能够在加强层20的形成时防止环氧树脂侵入于接头与衬里之间。并且,通过在金属筒体50设置用于嵌入第一O型圈60的外周槽52,能够容易地确保第一O型圈60的压溃量,因此起到提高密封的稳定性的效果。
另外,在罐1的轴L方向上,第一O型圈60和第二O型圈62位于相同的高度。这样,通过调整第一O型圈60和第二O型圈62的各自的挤压力一致在相同的高度,从而能够增强挤压力,并提高金属筒体50与衬里10之间的密封性、和金属筒体50与阀40之间的密封性。
并且,金属筒体50通过螺纹结合固定于接头30的连通孔33的下端部,因此与压入等方法相比,能够容易并且可靠地将金属筒体50内插并固定于连通孔33的下端部。另外,由此,将金属筒体50可装卸地固定于连通孔33的下端部,因此即使在向连通孔33的插入失败的情况下,也能够取下并更换金属筒体50。
以上,对本发明的实施方式进行了详述,但是本发明并不限定于上述的实施方式,在不脱离权利要求书所记载的本发明的精神的范围内,能够进行各种设计变更。
Claims (4)
1.一种罐,是具有存积气体的存积空间的筒状的罐,其特征在于,
在沿着所述罐的轴向将所述罐的外侧作为上、并将所述罐的内部侧作为下时,所述罐具备:
树脂制的衬里,设置有所述存积空间;
金属制的接头,具有构成为与所述存积空间连通的连通孔,并与所述衬里一体成型;
金属筒体,内插于所述接头的所述连通孔的下端部,并与所述连通孔同轴配置;以及
阀,以闭塞所述接头的方式插入于所述连通孔,其下端部还插入于所述金属筒体,
其中,所述衬里具有绕入部,该绕入部构成为从所述接头的底部绕入于所述连通孔的内部并与所述金属筒体的外周面相接触,
在所述绕入部的内周面与所述金属筒体的外周面之间,沿着周向配置有第一O型圈,
在所述金属筒体的内周面与所述阀的下端部的外周面之间,沿着周向配置有第二O型圈。
2.根据权利要求1所述的所述罐,其特征在于,
在所述罐的轴向上,所述第一O型圈和所述第二O型圈位于相同的高度。
3.根据权利要求1或2所述的罐,其特征在于,
所述金属筒体通过螺纹结合固定于所述接头的所述连通孔的下端部。
4.根据权利要求1~3中任一项所述的所述罐,其特征在于,
在所述金属筒体的外周面设置有第一外周槽,
所述第一O型圈配置于所述第一外周槽,
在所述阀的下端部的外周面设置有第二外周槽,
所述第二O型圈配置于所述第二外周槽。
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