CN117460910A - 压力容器用内胆及压力容器用内胆的制造方法 - Google Patents
压力容器用内胆及压力容器用内胆的制造方法 Download PDFInfo
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Abstract
一种压力容器用内胆(1),其由树脂制成,并通过将一对有底筒状的第1内胆部件(10)和无底筒状的第2内胆部件(20)彼此接合而形成,第2内胆部件(20)的壁厚随着从中央部到轴向两端的接合部(A、A)而逐渐变薄。另外,在第2内胆部件(20)的中央部以遍及内周面的方式形成有加强肋(21)。
Description
技术领域
本发明涉及一种压力容器用内胆及压力容器用内胆的制造方法(pressurevessel liner and method for manufacturing pressure vessel liner)。
背景技术
例如,在专利文献1中公开了一种被设置于压力容器内部的树脂制成的压力容器用内胆。专利文献1所涉及的压力容器用内胆通过将一对有底筒状的第1内胆部件和无底筒状的第2内胆部件彼此接合而形成。通过将无底筒状的第2内胆部件介设于一对第1内胆部件之间,能实现压力容器的大型化。第2内胆部件例如通过注塑成型而成型。
[现有技术文献]
[专利文献]
专利文献1:日本发明专利公开公报特开2006-242247号
发明内容
[发明所要解决的技术问题]
在成型第2内胆部件时,如果将用于注入熔融树脂的浇口(gate)设定为靠近模腔(cavity)的端部,则有可能使第2内胆部件的轴向上的两端部的成型精度下降。即,由于从浇口到各端部的距离不同,因此有可能使成型保压不均等而导致两端部的板厚不同。如果第2内胆部件的两端部的板厚不同,则在其与第1内胆部件接合时产生台阶。据此,存在应力集中于该台阶而强度下降的问题。
另外,压力容器在压力容器用内胆的周围由纤维增强树脂形成有加强层。在压力容器中,由于从压力容器用内胆向外部透过少量的气体,因此从压力容器用内胆的外侧(从压力容器用内胆与加强层之间)朝向内侧作用外部压力P2。一般,从压力容器用内胆的内侧朝向外侧作用内部压力P1,由于内部压力P1>外部压力P2,因此没有特别的问题。然而,根据条件变化,有可能内部压力P1<外部压力P2,从而产生压力容器用内胆从外侧朝向内侧凹进的扭曲(buckling)。该扭曲易于在设置第2内胆部件而形成的大型的压力容器上产生。
基于这样的技术问题,本发明的目的在于提供一种能提高强度的压力容器用内胆及压力容器用内胆的制造方法。
[用于解决技术问题的技术方案]
为了解决所述技术问题,本发明是一种压力容器用内胆,其由树脂制成,并通过将一对有底筒状的第1内胆部件和无底筒状的第2内胆部件彼此接合而形成,其特征在于,所述第2内胆部件的壁厚随着从中央部到轴向两端的接合部而逐渐变薄。
另外,本发明的特征在于,包括成型工序和接合工序,其中,在所述成型工序中,分别成型一对有底筒状的第1内胆部件和无底筒状的第2内胆部件;在所述接合工序中,将各所述第1内胆部件分别接合于所述第2内胆部件的两端,在所述成型工序中,以壁厚随着从型模上所设置的模腔的中央部到轴向两端而逐渐变薄的方式灌入树脂来成型所述第2内胆部件。
根据本发明,由于第2内胆部件的壁厚随着从中央部到轴向两端而逐渐变薄,因此能实现轴向两端的成型保压的均等化,能提高第2内胆部件的轴向两端的成型精度。据此,能在第1内胆部件与第2内胆部件的接合部处消除或减小台阶(径差),因此能避免接合部处的应力集中,从而提高强度。另外,能抑制脱模时因成型品与型模产生摩擦而导致的质量下降,能容易地脱模。
另外,优选为,在所述第2内胆部件的中央部以遍及内周面的方式形成有加强肋(reinforcing rib)。
根据本发明,由于形成有加强肋,因此能防止扭曲的产生。
另外,本发明是一种压力容器用内胆,其由树脂制成,并通过将一对有底筒状的第1内胆部件和无底筒状的第2内胆部件彼此接合而形成,其特征在于,在所述第2内胆部件的中央部以遍及所述第2内胆部件的内周面的方式形成有加强肋。
根据本发明,由于形成有加强肋,因此能防止扭曲的产生。
另外,优选为,所述加强肋呈环状。
根据本发明,能在整个周向上均等地进行加强。
[发明效果]
根据本发明所涉及的压力容器用内胆及压力容器用内胆的制造方法,能提高压力容器用内胆的强度。
附图说明
图1是本实施方式所涉及的压力容器用内胆的立体图。
图2是本实施方式所涉及的压力容器用内胆的侧剖视图。
图3是表示本实施方式所涉及的压力容器用内胆的制造方法的第2内胆部件的成型工序的侧剖视图。
图4是表示在本实施方式所涉及的压力容器用内胆的制造方法的成型工序中切除多余件的状态的侧剖视图。
图5是表示现有技术中的第2内胆部件的成型工序的侧剖视图。
图6是表示本实施方式所涉及的第2内胆部件的第1变形例的立体图。
图7是表示本实施方式所涉及的第2内胆部件的第2变形例的立体图。
图8是表示本实施方式所涉及的第2内胆部件的第3变形例的立体图。
具体实施方式
《实施方式所涉及的压力容器》
以下,参照附图,对本发明的实施方式进行说明。此外,在附图的说明中,对相同的结构要素标注相同的附图标记,并适当省略重复的说明。在以下的说明中,“前后”、“左右”、“上下”遵循图1、图2的箭头。
如图1和图2所示,本实施方式所涉及的压力容器100具有中空的压力容器用内胆1、连接嘴(接头)11、11和加强层30。压力容器100是在内部贮存例如氢等气体的容器。连接嘴11被设置于左右两端,是用于进行气体的注入排出的部位。加强层30形成于压力容器用内胆1的外周,是用于加强压力容器用内胆1的层。加强层30例如由纤维增强树脂形成。
加强层30通过将浸渍有热固化树脂的增强纤维(未图示)卷绕于压力容器用内胆1,并使热固化树脂固化而形成。加强层30的增强纤维例如可以使用玻璃纤维、碳纤维或芳族聚酰胺纤维等。
如图2所示,压力容器用内胆1具有树脂制成的第1内胆部件10、10和树脂制成的第2内胆部件20。压力容器用内胆1在长度方向(沿图1的左右方向)上被分成三部分,通过将第1内胆部件10、10和第2内胆部件20接合而形成。压力容器用内胆1的内部成为贮存气体的贮存空间。
(第1内胆部件)
如图1所示,第1内胆部件10在圆顶状的顶上部位具有连接嘴11。第1内胆部件10的一端开口,另一端以逐渐缩径的方式封闭。即,第1内胆部件10形成为一端侧开口的有底筒状。此外,第1内胆部件10并不限定于上述那样形成为圆筒状的情况。
连接嘴11例如由不锈钢等金属形成。阀组件(bulb assembly)等零部件被连接于连接嘴11的开口部。贮存空间与外部的气体流路之间通过该阀组件被连接。在本实施方式中,在压力容器用内胆1的两端部设置有连接嘴11,但也可以仅在一方的端部设置连接嘴11。
(第2内胆部件)
如图2所示,第2内胆部件20在轴向上的两端侧开口,且呈圆筒状。第2内胆部件20在内周面上,在轴向上的中央部20a附近以沿着周向的方式形成有加强肋21。第2内胆部件20的形状以加强肋21为中心大致线对称。在本实施方式中,加强肋21呈环状。加强肋21以固定的壁厚和固定的伸出长度在整个周向上连续地形成。
第2内胆部件20的壁厚形成为在中央部20a附近最厚,随着靠向轴向两侧的端部20b、20b而逐渐变薄。第1内胆部件10、10和第2内胆部件20以端部彼此对接的方式在接合部A、A被接合在一起。接合部A、A形成在整个周向上。接合方式并没有特别限制,在本实施方式中利用熔接而接合在一起。
(压力容器用内胆1的制造方法)
接着,对压力容器用内胆的制造方法进行说明。在本实施方式所涉及的压力容器用内胆的制造方法中,进行成型工序和接合工序。
在成型工序中,通过注射成型来分别成型第1内胆部件10和第2内胆部件20。第1内胆部件10、10通过使用第1内胆部件用型模(省略图示)来成型。
如图3所示,第2内胆部件20通过使用第2内胆部件用型模40来成型。第2内胆部件用型模40由作为凹模的第1型模41和作为凸模的第2型模42构成。通过将第2型模42嵌合于第1型模41,而形成模腔22和浇口23。
模腔22是成为圆筒状的空间部的部位。模腔22的从轴向上的中央部到两端部的距离L、L相等。另外,模腔22形成为随着从中央部到两端部其厚度(空间的高度)逐渐减小。更详细而言,模腔22的外径在轴向上是固定的。另一方面,模腔22的内径形成为随着从中央部到轴向两端部而逐渐变大。即,模腔22的内周面22b以随着从中央部到两端部而逐渐接近外周面22a的方式倾斜。
浇口23是用于向模腔22内注入熔融树脂的部位。浇口23由直线部23a和圆板部23b构成。直线部23a是直线状的空间部。圆板部23b是与直线部23a的顶端连续的圆板状的空间。圆板部23b与直线部23a垂直。另外,圆板部23b的外周缘与模腔22的中央部连通。
首先,在第2内胆部件20的成型工序中,如图3的箭头所示,从浇口23的直线部23a灌入熔融树脂。据此,熔融树脂依次被填充到圆板部23b、模腔22的中央部、模腔22的两端部。在冷却规定时间后,使第2内胆部件用型模40脱模,取出成型件。最后,如图4所示,从成型件切除多余件51而完成第2内胆部件20。多余件51的截面呈T字形。在该切除工序中,留下成型件中的、由圆板部23b成型的部位的外周端,同时将其余部分切除成圆形。据此,形成加强肋21。第2内胆部件20的外周面20c的外径在轴向上是固定的。第2内胆部件20的内周面20d的内径形成为随着从中央部20a到两端部20b、20b而逐渐变大。
在接合工序中,将第1内胆部件10、10与第2内胆部件20接合。接合的方式并没有特别限制,在本实施方式中利用熔接(振动熔接)进行接合。据此,第1内胆部件10与第2内胆部件20的端部彼此在整个周向上在接合部A处相接合。如上所述,形成压力容器用内胆1。
此外,压力容器用内胆的制造方法并不限定于所述的方法。例如,成型工序例示了注射成型,但也可以通过旋转成型、吹塑成型等其他的成型方法来成型。
(作用效果)
在此,对现有技术中的压力容器用内胆的无底筒状的第2内胆部件的成型方法进行说明。如图5所示,在现有技术的成型方法中,使用了第2内胆部件用型模40A,该第2内胆部件用型模40A具有作为凹模的第1型模41A和作为凸模的第2型模42A。在第2内胆部件用型模40A中,用于注入熔融树脂的浇口23A被设定于靠近模腔22A的一方的端部。因此,存在如下问题:难以在模腔22A中的远离浇口23A的端部和靠近浇口23A的端部处将成型保压保持为固定,从而导致第2内胆部件的两端的板厚不同。据此,存在与第1内胆部件接合时产生台阶而使强度下降的问题。
关于这一点,根据以上说明的本实施方式的压力容器用内胆1,由于第2内胆部件20的壁厚随着从中央部20a到轴向两端而逐渐变薄,因此能实现轴向两端的成型保压的均等化,能提高第2内胆部件20的轴向两端的成型精度。据此,能在第1内胆部件10与第2内胆部件20的接合部A处消除或减小台阶(径差),因此能避免接合部A处的应力集中,从而提高强度。
另外,由于从中央部20a朝向轴向两端倾斜,且壁厚逐渐变薄(由于具有拔模斜度),因此在使成型品从第2内胆部件用型模40脱模时,易于取出成型品而能提高成型精度。另外,在第2内胆部件20的中央部以遍及内周面的方式形成有加强肋21,因此能提高压力容器用内胆1的强度,能防止扭曲的产生。
另外,加强肋21呈环状,以遍及第2内胆部件20的周向的方式均等地设置,因此能避免应力集中,均衡地进行加强。
另外,根据本实施方式所涉及的压力容器用内胆的制造方法,能利用浇口23来形成加强肋21。据此,不需要另外进行形成加强肋21的工序,因此能减少作业工时。
以下对加强肋21的变形例进行说明。
如图6所示,第1变形例所涉及的加强肋21A在其中心设置有圆形的小孔21a,在其上下左右设置有多个圆形的大孔21b。
另外,如图7所示,第2变形例所涉及的加强肋21B还在图6的第1变形例上均等地设置有4个圆形的小孔21a。
另外,如图8所示,第3变形例所涉及的加强肋21C在其中心设置有圆形的小孔21a,在其周边设置有多个相同形状的扇形的孔21c。
如此一来,只要考虑配置平衡、在内部贮存的气体的流动来适当地设定加强肋21即可。
以上对本发明的实施方式进行了说明,在不脱离本发明的主旨的范围内能进行适当的设计变更。实施例中所示的加强肋21的形状是一例,并不限定本发明。例如,加强肋21上所设置的孔可以形成为四边、狭缝状的间隙,也可以不在中心设置小孔。
[附图标记说明]
100:压力容器;1:压力容器用内胆;10:第1内胆部件;20:第2内胆部件;21:加强肋;30:加强层。
Claims (5)
1.一种压力容器用内胆,其由树脂制成,并通过将一对有底筒状的第1内胆部件和无底筒状的第2内胆部件彼此接合而形成,
其特征在于,
所述第2内胆部件的壁厚随着从中央部到轴向两端的接合部而逐渐变薄。
2.根据权利要求1所述的压力容器用内胆,其特征在于,
在所述第2内胆部件的中央部以遍及内周面的方式形成有加强肋。
3.一种压力容器用内胆,其由树脂制成,并通过将一对有底筒状的第1内胆部件和无底筒状的第2内胆部件彼此接合而形成,
其特征在于,
在所述第2内胆部件的中央部以遍及所述第2内胆部件的内周面的方式形成有加强肋。
4.根据权利要求2或3所述的压力容器用内胆,其特征在于,
所述加强肋呈环状。
5.一种压力容器用内胆的制造方法,其特征在于,
具有成型工序和接合工序,其中,
在所述成型工序中,分别成型一对有底筒状的第1内胆部件和无底筒状的第2内胆部件;
在所述接合工序中,将各所述第1内胆部件分别接合于所述第2内胆部件的两端,
在所述成型工序中,以壁厚随着从型模上所设置的模腔的中央部到轴向两端而逐渐变薄的方式灌入树脂来成型所述第2内胆部件。
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