CN1768230A - 用于波纹管的传导性聚合物护套 - Google Patents

用于波纹管的传导性聚合物护套 Download PDF

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CN1768230A
CN1768230A CN200480008806.XA CN200480008806A CN1768230A CN 1768230 A CN1768230 A CN 1768230A CN 200480008806 A CN200480008806 A CN 200480008806A CN 1768230 A CN1768230 A CN 1768230A
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bellows
pipe fitting
thermoplastic polymer
jacket
conductive
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CN100451419C (zh
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迪安·W·里韦斯特
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Omega Flex Inc
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
    • F16L11/15—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics corrugated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • F16L11/118—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having arrangements for particular purposes, e.g. electrically conducting
    • F16L11/1185—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having arrangements for particular purposes, e.g. electrically conducting electrically conducting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
    • Y10T428/1393—Multilayer [continuous layer]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Laminated Bodies (AREA)
  • Details Of Indoor Wiring (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)

Abstract

一种管件，其包括传导性波纹管及传导性聚合物护套，其中所述传导性波纹管包括峰和谷的环道，传导性聚合物护套沿着所述波纹管的长度方向设置在所述谷内。

Description

用于波纹管的传导性聚合物护套
背景技术
波纹管或金属软管可代替刚性管件，用作输送流体，如天然气，的管道。波纹管便于安装且在许多系统应用有用。由于波纹管具有独特的柔韧性结构及其强度较高，因而安装简单并且费用不高。但是具有所述柔韧性的同时，也存在固有缺陷。随着管子内工作流体内部压力的增高，波纹管结构体对所述压力作出反应。当内部压力克服管子材料的强度时，普通的波纹管结构体即开始沿着其长度方向伸展和膨胀。工作流体的更高的压力引起波纹膨胀。波纹膨胀导致管子产生变形，不能保持其原始的形状和大小。
为了满足更高的操作压力范围，可使传统型波纹管套上金属丝编织套。编织套固定在波纹管的两端。编织套加固波纹管结构体，从而当内部压力增大时可抵抗波纹的膨胀。编织套能够有效地抵抗波纹管的膨胀，从而提高了其对操作压力的耐受性。但是，覆盖在波纹管外径上的编织套易于与其所覆盖的波纹管发生相对移动。管子和编织套沿着波纹管的长度方向彼此相对移动。在将波纹管直插到机器设备内的情况中，产生转移到管子上的振动，所述相对移动使编织套的内侧和管子的外表面之间产生磨损。管子外表面和编织套内表面之间的磨损导致机构失效，从而损害波纹管结构体的完整性。编织套锯掉及擦掉波纹管的外表面材料，直到管子的耐压限度失效，进而造成工作流体泄漏。
现有技术管子的另一个缺点为通常管子封包在护套中，通常所述护套又由绝缘材料制成。当管子被引入电荷(例如，直接或间接来自雷击)，电荷聚集在护套上并可烧坏护套，并累及管子，进而导致管子破裂。
发明内容
本发明的一个具体实施方式是一种管件，其包括传导性波纹管及沿着波纹管的长度方向设置的传导性聚合物护套，其中所述传导性波纹管包括峰和谷的环道(convolutions)。
本发明的另一个具体实施方式为一种管件，其包括传导性波纹管沿着波纹管的长度方向设置的传导性的热塑性聚合物护套，其中所述传导性波纹管包括峰和谷的环道(convolutions)。所述热塑性聚合物的最小抗张强度为大约4000psi(磅/平方英寸)、最小延展率为大约300％、最小挠曲模量为大约25000psi(磅/平方英寸)以及最大体积电阻率为大约7×1^4ohm-cm。在波纹管的一端上连接有一个装配件。
附图说明
附图1是电荷释放管件的局部剖视的侧视图。
具体实施方式
附图1是电荷释放管件(charge dissipating tubing assembly)10的局部剖视的侧视图。管件10包括管子12和传导性护套14。管子12可以是输送流体(比如天然气、液体等)的环形不锈钢波纹管(CSST)。供选择地，管子12还可以是螺旋形管。
护套14挤压成形(extruded)在管子12上。波纹管12具有一个外表面和一个内表面。典型地，内表面暴露到工作流体。波纹管12具有这样的结构：即其具有变化的直径或环道(convolutions)，从而形成了沿着波纹管12的长度方向交错分布的峰和谷。由于相对于内表面，用外表面来指代这些峰和谷。峰由外径较大的环道组成，谷则由外径较小的环道组成。
传导性护套14被置于波纹管12的外表面上。传导性护套14可大体上填充外表面上的谷以并覆盖外表面上的峰。传导性护套14沿着波纹管12的长度方向布置。制成传导性护套14的材料具有抵抗可使材料产生变形的力，比如张力和剪切力。因此，当工作流体的内部压力上升，并开始撑开波纹管12时，位于外表面谷内的传导性护套14抵抗所产的力。传导性护套14抑制波纹管12的膨胀或伸展，从而波纹管12不会显著变形，即波纹管12的长度尺寸或直径均不会显著变化。传导性护套14支撑波纹管12的每一个环道。制成传导性护套14的材料还具有弹性和柔韧性。当波纹管12沿着其长度方向弯曲及伸缩时，传导性护套14随着波纹管12一同弯曲和伸缩。
传导性护套14的厚度可以变化，以增强其对管子膨胀的抵抗力，或使波纹管12具有更大或更小的柔韧性。通过改变传导性护套14的厚度可以满足多个额定压力。传导性护套14的厚度和波纹管12的额定压力之间存在着直接的关系。相对于没有使用传导性护套14的波纹管12，采用传导性护套14的波纹管12可以增大额定压力。传导性护套14还可增加挠曲次数，其中所述挠曲是造成金属疲劳失效的原因，并可削弱振动以减少由于振动疲劳而使波纹管12失效。
传导性护套14可以挤压到波纹管12的波纹上。也可使用其它制造工艺以使传导性护套14设置在波纹管12的外表面上。在一个具体实施方式中，传导性护套14被推压到谷内，大体上填充谷并覆盖峰。当传导性护套14被挤压时，其大体上熔融并向下流动到波纹管12的波纹上。熔融的传导性护套14在波纹管12上冷却。熔融材料大体上填充谷并覆盖峰。在另一个具体实施方式中，聚合物传导性护套14被挤压到波纹上，而后对其进行固化(例如通过加热)。
还可通过这样的方式应用传导性护套：即把传导性护套14结合到波纹管的基本上整个外表面上。将传导性护套14结合到外表面上的备选方法可以是机械结合或化学结合，从而传导性护套14大体粘附到波纹管12的外表面上。另外，通过将传导性护套14置于谷内，由于所述传导性护套14的材料性能，所述传导性护套14机械阻碍波纹管12的变形。通过上述这种方式应用传导性护套14，传导性护套14与波纹管12的表面之间具有粘附力，从而在传导性护套14与波纹管12的表面之间不会发生相对移动。传导性护套14和外表面之间不发生相对移动，则可大体消除磨损机理，同时还可提供抗压补强(pressurereinforcement)。
在另一个具体实施方式中，传导性护套14挤压在波纹管12上，但是没有被推入波纹管的谷内。即传导性护套14覆盖波纹管12的峰，但是没有被推入谷内。
传导性护套14可由具有传导性的热塑性聚合物制成，比如热塑性醚基(polyether-based)聚亚安酯复合物。还可使用其它具有传导性的热塑性塑料制作护套14，本发明并未受限于聚亚安酯。优选地，所述聚合物具有如下性能。
                       表A
  性能   方法   数值
  抗张强度   ASTM D638   最小约4,000psi(磅/平方英寸)
  延展率   ASTM D638   最小约300％
挠曲模量 ASTM D790   最小约25,000psi(磅/平方英寸)
  体积电阻率   ASTM D257   最大约7×10^4ohm-cm
在另一个具体实施方式中，传导性护套由具有如表A所示特性的热塑性聚乙烯制成。所述聚乙烯护套可通过如上所述方式结合到波纹管12上。
在管件的一端或两端具有装配件16。装配件16可以是现有技术中的CSST装配件，如在美国专利第5,799,989号、第6,079,749号及第6,276,728号中所揭示的装配件，这些专利的全部内容引用于此以作参考。优选地，所述端部装配件由金属制成(如黄铜)。
由于护套14由具有传导性的热塑性塑料制成，聚集在护套14上的电荷(例如由直接或间接雷击引起)可经护套14而被传导到管子12上，接着传导到端部装配件16并通过连接到装配件16的部件上。这样，管子12不会被聚集在非传导性护套上的电荷损坏。
所述管件具有多种用途，其可应用在住宅区或商业区、室内或室外、以及地上或地下那些有可能发生雷击(直接或间接)或具有引起电荷聚集的其他因素的安装场所中。
尽管已经示出并描述了具体实施方式，但可以对本发明作出许多修改及替代而不脱离本发明的精神和范围。因此，应可以理解对本发明的描述仅是示例性的，而非限制。

Claims (13)

1、一种管件，其包括：
传导性波纹管，其包括峰和谷的环道；
传导性聚合物护套，其沿着所述波纹管的长度方向设置。
2、如权利要求1所述的管件，其特征在于，所述波纹管为环形波纹管。
3、如权利要求1所述的管件，其特征在于，所述波纹管为螺旋形波纹管。
4、如权利要求1所述的管件，其特征在于，所述聚合物护套为热塑性聚合物护套。
5、如权利要求4所述的管件，其特征在于，所述热塑性聚合物醚基聚亚安酯(polyether-based polyurethane)。
6、如权利要求4所述的管件，其特征在于，所述热塑性聚合物为聚乙烯。
7、如权利要求4所述的管件，其特征在于，所述热塑性聚合物的最小抗张强度为大约4,000psi(磅/平方英寸)。
8、如权利要求4中所述的管件，其特征在于，所述热塑性聚合物的最小延展率为大约300％。
9、如权利要求4所述的管件，其特征在于，所述热塑性聚合物的最小挠曲模量为大约25,000psi(磅/平方英寸)。
10、如权利要求4所述的管件，其特征在于，所述热塑性聚合物的最大体积电阻率为大约7×1^4ohm-cm。
11、如权利要求1所述的管件，其特征在于，所述传导性聚合物护套大体上填充所述谷并大体上覆盖所述峰。
12、如权利要求1中所述的管件，其进一步包括在所述波纹管的一端连接到所述波纹管。
13、一种管件，其包括：
传导性波纹管，其包括峰和谷的环道；
传导性的热塑性聚合物护套，其沿着所述波纹管的长度方向设置，所述热塑性聚合物的最小抗张强度为大约4,000psi(磅/平方英寸)、最小延展率为大约300％、最小挠曲模量为大约25,000psi(磅/平方英寸)以及最大体积电阻率为大约7×1^4ohm-cm；
在所述波纹管的一端连接到所述波纹管上。
CNB200480008806XA 2003-04-08 2004-04-07 用于波纹管的传导性聚合物护套 Expired - Fee Related CN100451419C (zh)

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BRPI0409131A (pt) 2006-03-28
CN100451419C (zh) 2009-01-14
AU2004230663A1 (en) 2004-10-28
WO2004092634A1 (en) 2004-10-28
MXPA05010775A (es) 2005-12-12
US20040200537A1 (en) 2004-10-14
ZA200508012B (en) 2006-07-26
DK1611384T3 (da) 2006-12-18
DE602004001986T2 (de) 2007-04-26
RU2005134367A (ru) 2006-03-10
DE602004001986D1 (de) 2006-09-28
CY1105718T1 (el) 2010-12-22
ATE336684T1 (de) 2006-09-15
NZ542750A (en) 2006-10-27
CA2520276A1 (en) 2004-10-28
EP1611384B1 (en) 2006-08-16
US7044167B2 (en) 2006-05-16
PL205768B1 (pl) 2010-05-31
IL170983A (en) 2010-05-31
PT1611384E (pt) 2007-01-31
CA2520276C (en) 2011-12-13
PL377682A1 (pl) 2006-02-06
ES2270383T3 (es) 2007-04-01
EP1611384A1 (en) 2006-01-04
RU2333413C2 (ru) 2008-09-10

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