| 1. | Design of the detecting system in the inner valve leakage based on acoustics
基于声谱分析的阀门内泄漏检测系统 |
| 2. | Valves leakage result in economy and society loss surprising . the method for detecting valves inner leakage is less and un - effectively
由于阀门泄漏造成的经济和社会损失是十分惊人，而针对阀门内漏的检测手段较少且效果较差。 |
| 3. | These fire - safe valves provide a bubble tight barrier on both upstream and down stream seats and eliminate possible product contamination or loss of fluids due to valve leakage
这种防火安全阀门在上游和下游阀座提供气密性屏障关闭性能，消除了由于阀门泄漏造成产品污染或流体损失的可能。 |
| 4. | It is important that acoustic test is applied to valve leakage testing and evaluation . quadrupole sources come from leaking gap . dipole sources occur in complex structure valves through analyzing leak in valves
通过对承压阀门内漏过程分析表明，在阀门湍流流场中，因为有泄漏缝隙的存在，必将产生四极子声。 |
| 5. | It makes the application , maintenance and replacing of valves scientific and the valves management more normally . moreover , it could estimate valve leakage rate on basis of the analysis of testing data
该软件不仅能够实现石油、石化企业阀门使用、维护和更换的科学化和规范化，而且通过对阀门内漏声学检测数据的分析，实现对阀门泄漏率的定量评价。 |
| 6. | Best test regions are confirmed to found the acoustic emission test method for valve leakage . the large amount of data collected also allowed a brief investigation of the effects of different opening , valve types , differential pressure and leakage rates
根据本次研究工作的目的和特点并结合现场的实际情况，探讨了内漏时阀门开度、阀门类型、两侧压差以及泄漏率等因素变化时的声学特性。 |
| 7. | The first section is about the way and principle of the h ( k ) f operation valve ; the second section is about controlled way of the air gate . the third section is about the controlled and transmission of the pressure signals in train pip , auxiliary pressure air tank and bake tank ; the fourth section is about the auto test way and principle of the three thoroughfare valve leakage
第一部分是h ( k ) 、 f操作阀的控制方法和原理；第二部分是风门的控制方法与原理；第三部分是列车管、副风缸、制动风缸压力信号的采集与传输控制；第四部分是三通阀漏泄自动检测方法与原理。 |
| 8. | The study instructs simulating valve leakage experiment , perfects valves leakage test technology and bases theoretically for applying valve leakage test in practice . the test stand is constructed and instrumented to accept a variety of valves in order to determine which characteristics of acoustic emission change with leakage rate . the data for each valve type is generated by varying valve type and working medium
建立模拟在用承压阀门内漏实验台，研究典型阀门内漏声源的声学特性，确定声发射特征参量与泄漏率的关系，为定量评价阀门泄漏率提供实验数据；通过对不同类型、不同规格、不同工作介质下的典型承压阀门内漏的实验研究，确定阀门内漏最佳检测区域，建立在用承压阀门内漏声学检测方法。 |
| 9. | Currently , china ' s production of a common valve leakage , which leak , visual quality is not high , short life , and not flexible operating valves and electrical devices such as pneumatic devices unreliable shortcomings of some products , only the equivalent of the early 1980s , the international standard
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世纪80年代初的国际水平。 |
