CN107379562A - 大口径钢塑复合压力管外胀式无缝热熔连接方法 - Google Patents
大口径钢塑复合压力管外胀式无缝热熔连接方法 Download PDFInfo
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Abstract
本发明公开了一种大口径钢塑复合压力管外胀式无缝热熔连接方法,钢塑复合压力管材具有钢管层及内、外塑料管层,塑料管件具有内、外环部和环形承插腔,管件内放入的气囊连通气管,气管外接充气装置;气囊充盈成圆柱形并贴于内环部;管材插置到环形承插腔内;电磁熔具通电,对位于环形承插腔内的钢管层加热,内、外塑料管层受热熔融,气囊持续的挤压令受热的内环部形变,以促使内环部充分填补其与内塑料管层之间的缝隙;断电并撤离电磁熔具,冷却固化后给气囊放气以取离气囊和气管。采用该方法后,实现内环部充分填补因大口径钢塑复合压力管客观存在失圆缺陷而产生的熔接缝隙,消除了内塑料管层与内环部间的熔接缝隙,本发明对连接口径限制小。
Description
【技术领域】
本发明涉及一种大口径钢塑复合压力管外胀式无缝热熔连接方法,属于管道熔接技术领域。
【背景技术】
在管道工程的建设中,钢塑复合压力管材难以真正实现与塑料管件形成紧密封熔接,钢塑复合压力管材不可避免地与塑料管件的内环部存在熔接缝隙,从而出现渗漏现象,由于钢塑复合压力管材客观存在失圆缺陷(比如由制造、运输过程等引起),熔接缝隙将会变得不可控,而对于配套塑料管件与钢塑复合压力管材的直径大于110mm的大口径熔接时,熔接缝隙势必将更难以控制。
如何促使钢塑复合压力管材与塑料管件之间可靠无缝隙紧密封熔接,此乃管道业界的一个技术难题,申请人经过潜心不懈研究,于2016年9月10日提交了电磁感应内胀式充分热熔连接管道,该技术方案虽然能够实现纯塑料管件与金属塑料复合管材形成无缝熔接密封,但是却存在如下技术不足:
1、需要在纯塑料管件内固定安装环形衬套、橡胶套,一方面增加了零件成本和安装成本,另一方面由于环形衬套的存在减少了纯塑料管件的通径;
2、受金属塑料复合管材与纯塑料管件的连接口径制约大,难能适应110mm以上大口径的金属塑料复合管材与纯塑料管件的熔接,仅仅靠橡胶套自身弱小的挤压胀力无法实现大口径管的无缝熔接。
【发明内容】
针对上述现有技术存在的不足,本发明的目的在于提供一种连接成本低、熔接强度高的大口径钢塑复合压力管外胀式无缝热熔连接方法,采用该方法使得钢塑复合压力管材与塑料管件之间可形成高可靠、无缝隙熔接密封,杜绝了管道渗漏现象的发生,且对配套的钢塑复合压力管材与塑料管件的连接口径限制小。
为此,本发明提供如下技术方案:
大口径钢塑复合压力管外胀式无缝热熔连接方法,包括熔接用的钢塑复合压力管材和被熔接的塑料管件,钢塑复合压力管材具有钢管层及位于该钢管层内、外两侧的内塑料管层、外塑料管层,塑料管件具有至少一个内环部、外环部和形成于内环部与外环部之间的环形承插腔,该方法在于:先往塑料管件内放入气囊,气囊采用耐高温的橡胶气囊,且气囊连通有气管,气管外接充气装置,接着往气囊内缓慢充注空气,使得充盈成圆柱形的气囊贴于塑料管件的内环部,然后将钢塑复合压力管材插置到塑料管件的环形承插腔内,进而给电磁熔具通电,通过电磁熔具对位于环形承插腔内的钢塑复合压力管材其钢管层进行电磁感应加热,内、外塑料管层受热熔融,气囊持续的挤压令受热的内环部形变,以促使内环部充分填补其与内塑料管层之间的缝隙,之后断电并撤离电磁熔具,冷却固化后给气囊放气以取离气囊和气管,得到塑料管件与钢塑复合压力管材的热熔连接成品。
作为对上述方案进一步补充和完善,本发明还包括如下技术特征:
电磁熔具为具有电磁感应线圈的带式电磁熔具,该带式电磁熔具包覆在塑料管件其环形承插腔对应的外环部表面,结合电磁熔带具和气囊二个技术手段可效果更好地满足大口径塑料管件与钢塑复合压力管材连接的需要。
气囊在其左、右两侧分设有左、右二只注气阀,各注气阀外接一根气管。
与现有技术相比,本发明具有如下优点和积极效果:
1、本发明大口径钢塑复合压力管外胀式无缝热熔连接方法,在塑料管件的内环部贴设充盈成圆柱形的气囊,再在塑料管件的环形承插腔内插置钢塑复合压力管材,基于电磁感应加热的基础上,在外胀状态的气囊持续挤压下令受热的内环部形变,实现内环部充分填补因大口径钢塑复合压力管材客观存在失圆缺陷而产生的熔接缝隙,使配套热熔连接在一起的大口径钢塑复合压力管材与塑料管件,彻底地消除了内塑料管层与内环部间的熔接缝隙,杜绝了流体从这二者间渗漏出去,管路对流体的密封性好,避免了管道渗漏隐患。本发明构思巧妙,采用气囊促使钢塑复合压力管材与塑料管件无缝隙熔接密封属首创,钢塑复合压力管材与塑料管件的连接口径限制小;
2、由于熔接冷却固化后,气囊是取离的,因此本法不影响原有塑料管件的通径,对管道流量不影响,且气囊可多次重复使用,无须如现有技术那样需要环形衬套、橡胶套,零件成本、安装成本节省显著;
3、内环部受热后在气囊的密切贴挤下,内环部其自身微观结构获得了重塑,内环部冷却后变得结实致密,从而提高了大口径钢塑复合压力管材与塑料管件的熔接强度;
4、气囊采用耐高温的橡胶气囊,橡胶气囊对内环部挤压均匀效果好。
【附图说明】
图1采用本发明方法的钢塑复合压力管材与塑料管件进行无缝熔接的示意图。
【具体实施方式】
请参考图1所示,大口径钢塑复合压力管外胀式无缝热熔连接方法,包括熔接用的钢塑复合压力管材1和被熔接的塑料管件2,钢塑复合压力管材1具有钢管层10及位于该钢管层10内、外两侧的内塑料管层11、外塑料管层12,塑料管件2具有至少一个内环部21、外环部22和形成于内环部21与外环部22之间的环形承插腔20,该方法在于:先往塑料管件2内放入气囊3,气囊采用耐高温的橡胶气囊,且气囊3连通有气管4,气管4外接充气装置(未图示),接着往气囊3内缓慢充注空气,使得充盈成圆柱形的气囊3贴于内环部21,然后将钢塑复合压力管材1插置到塑料管件2的环形承插腔20内,进而给电磁熔具通电,通过电磁熔具对位于环形承插腔20内的钢塑复合压力管材1其钢管层10进行电磁感应加热,内塑料管层11和外塑料管层12受热熔融,气囊3持续的挤压令受热的内环部21形变,以促使内环部21充分填补其与内塑料管层11之间的缝隙,之后断电并撤离电磁熔具,钢塑复合压力管材1和塑料管件2冷却固化后给气囊3放气以取离气囊3和气管4,得到塑料管件2与钢塑复合压力管材1的热熔连接成品。
本实施例图中示出的塑料管件2为弯头塑料管件,当然亦可以是直二通塑料管件、三通塑料管件、四通塑料管件等。
在本实施例中,气管4的外接端通过气门嘴(未图示)连接充气装置,充气装置为打气泵。
电磁熔具为具有电磁感应线圈51的带式电磁熔具5,该带式电磁熔具5包覆在塑料管件2其环形承插腔20对应的外环部22表面。
根据钢塑复合压力管材1的内、外塑料管层的壁厚与直径,一般情况下带式电磁熔具5加热至210-250℃就可实现钢塑复合压力管材1与塑料管件2热熔连接。
如图所示,气囊3在其左、右两侧分设有左注气阀32、右注气阀31,各注气阀外接一根气管。
Claims (3)
1.一种大口径钢塑复合压力管外胀式无缝热熔连接方法,包括熔接用的钢塑复合压力管材和被熔接的塑料管件,钢塑复合压力管材具有钢管层及位于该钢管层内、外两侧的内塑料管层、外塑料管层,塑料管件具有至少一个内环部、外环部和形成于内环部与外环部之间的环形承插腔,其特征是该方法在于:先往塑料管件内放入气囊,气囊采用耐高温的橡胶气囊,且气囊连通有气管,气管外接充气装置,接着往气囊内缓慢充注空气,使得充盈成圆柱形的气囊贴于塑料管件的内环部,然后将钢塑复合压力管材插置到塑料管件的环形承插腔内,进而给电磁熔具通电,通过电磁熔具对位于环形承插腔内的钢塑复合压力管材其钢管层进行电磁感应加热,内、外塑料管层受热熔融,气囊持续的挤压令受热的内环部形变,以促使内环部充分填补其与内塑料管层之间的缝隙,之后断电并撤离电磁熔具,冷却固化后给气囊放气以取离气囊和气管,得到塑料管件与钢塑复合压力管材的热熔连接成品。
2.根据权利要求1所述的大口径钢塑复合压力管外胀式无缝热熔连接方法,其特征在于:所述电磁熔具为具有电磁感应线圈的带式电磁熔具,该带式电磁熔具包覆在塑料管件其环形承插腔对应的外环部表面。
3.根据权利要求1所述的大口径钢塑复合压力管外胀式无缝热熔连接方法,其特征在于:所述气囊在其左、右两侧分设有左、右二只注气阀,各注气阀外接一根气管。
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CN113518704A (zh) * | 2019-02-27 | 2021-10-19 | 赛峰飞机发动机公司 | 使用可充气囊状物组装用于飞行器涡轮机的出口导向叶片 |
CN113518704B (zh) * | 2019-02-27 | 2023-11-24 | 赛峰飞机发动机公司 | 使用可充气囊状物组装用于飞行器涡轮机的出口导向叶片 |
CN112123795A (zh) * | 2020-09-21 | 2020-12-25 | 哈尔滨工业大学(威海) | 一种金属/塑料管全位置热压连接*** |
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