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    高端阀门技术与国际水平差距浅析
    来源:工控网 发布日期:2012-10-02

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    随着我国经济的快速发展,阀门业作为一个民族产业,历经数年风雨,在全国各地得以快速发展,成为国内机械行业发展较快的主要产业之一,我国阀门行业虽发展步伐较快,但出现的问题也较多,行业发展水平低,产品技术含量低,控制阀好多产品还是低档的多。由于国内阀门行业起步晚,目前还处于发展阶段、阀门设计、制造、生产和试验能力低于国外先进水平,好多关键阀门还依赖进口,许多阀门没有核心技术,加上自动化控制水平的限制,在高端阀门技术方面与发达国家相比有一定差距,出现如此问题究竟原因何在?
      
      在我国目前的阀门市场上,除了低压阀门已经达到国际市场能接受的水平外,高压阀门仍然要依靠进口。在宏观经济持续看好的形势下,阀门行业的大部分生产和销售指标都保持了较快的增长,但是由于价格战的影响,行业销售收入和利润都较去年大幅下降。
      
      随着世界经济的回暖,我国阀门产品的进出口也有所增长,但是国际阀门市场的竞争也在不断加剧。由于在高端技术上与国外的大厂商仍有较大的差距,因此在今后一段时期内,产品技术将成为制约我国阀门产品发展的一个瓶颈。
      
      阀门是石油、化工、电站、长输管线、造船、核工业、各种低温工程、宇航以及海洋采油等国民经济各部门不可缺少的流体控制没备。据泵阀英才网专家调查发现,经过多年的发展,我国的阀门企业数量居全世界第一,各种大小阀门企业约6000余家,其中年产值超过500万元的有900家。从产品情况来看,我国阀门行业目前已经能生产十几大类产品,如闸阀、截止阀、球阀、蝶阀、安全阀、止回阀、节流阀、旋塞阀、减压阀、隔膜阀、疏水阀、紧急切断阀等,最高使用温度达到570℃,最低为-196℃、最高压力为600Mpa,最大通径达到5350毫米。
      
      另外,根据相关部门统计,我国每年阀门市场成交额高达500亿元左右,其中100多亿元的市场却被国外阀门企业占领。虽然我国阀门行业经过改革开放后的大力发展,已经取得了不小的成绩。但目前,我国阀门行业仍然还存在着一些问题,如目前我国阀门企业主要以低层次、小规模、家庭作坊式企业为主。
      
      在产品上,由于重复投资,技术投资、引进不够,我国阀门企业的主导产品仍然是低质量的大众产品。目前我国企业生产的各种阀门普遍存在着外漏、内漏、外观质量不高、寿命短、操作不灵活以及阀门电动装置和气动装置不可靠等缺点,部分产品只相当于上个世纪八十年代初的国际水平。而一些高温高压和关键装置上需要的阀门依然依赖进口,另外,我国阀门行业在产业结构、阀门工业的产业链,以及行业的专业化程度均同国外企业存在较大的差距。造成国内阀门产品质量低下的原因在于:由于市场急速扩大,而原有国营阀门企业纷纷关停并转,本来机械工业水平就不高,乡镇企业(民营企业)迅速发展起来。但是乡镇企业起点低,技术力量非常薄弱,设备简陋,产品大多数都是模仿生产,特别是给排水用的低压阀门,问题严重。
      
      目前我国阀门行业与国外阀门行业差距较为明显,主要存在四大综合性差距:一是技术创新能力上的差距;二是加工工艺上的差距;三是质量管理及设备方面的差距;四是流程管理上的差距。这也让我们看到自身的不足,以此找到差距与问题实质,从而改进与提高。

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