气密性检测装置检测方案设计详解
气密性检测装置采用的增压比为 40:1的气体增压泵,其动力来源是空压机的0.3-0.8MPa的压缩空气,额定输出压力为12-32MPa。装置上配有手动调压阀,通过调整增压泵的驱动压力即可无级调整增压泵的输出高压气体的压力,出口接有3米的高压测压软管,用户只需准备一排量在0.5-0.75m3/min的空压机,通上气管就可进行CNG汽车改装管路的气密性检测。
Air tightness detection device using the pressure ratio of the gas booster pump 40:1, its power source is the air compressor 0.30.8MPa compressed air pressure is 12-32MPa, rated output. Device is equipped with manual pressure regulating valve, by adjusting the pump to drive the output of high pressure gas pressure can stepless adjustment of the booster pump pressure, the outlet is connected with the high pressure hose 3 meters, users only need to prepare a 0.5-0.75m3/min discharge in air compressor, air tightness detection through the trachea can be CNG auto tuning pipe.
气密性检测可按测试手段分为两大类,一类为水没式泄漏检测法(又称湿式浸水法),即在向工件腔内充进一定压力的气体时,将其浸人水中或涂肥皂泡,根据目测肥皂泡或水中的气泡来判定工件是否有漏及泄漏的程度。目前,这种方法在冰箱、空调的密封管道以及箱体检漏时仍普遍采用。这种方法测试效率低,受主观因素影响较大,无法定量丈量,同时用这种方法测试后,还必须对工件进行干燥和防锈处理。
Tightness test according to the testing methods are divided into two categories, one for the water not leak detection method (also known as wet immersion method), namely to workpiece cavity gas charged into a certain pressure, the immersion in water or soap bubble, according to visual soap bubble or bubbles in water to determine. If there is leakage and the leakage degree. At present, this method is still widely used in refrigerators, air conditioning and sealing pipeline leak detection when the box. This test method is low efficiency, greatly influenced by subjective factors, not quantitative measurement, testing and using this method, but must be dry and anti rust treatment on workpiece.
另一类为干式泄漏检测法,即不再用浸水法,而是向工件腔内充进一定压力的气体,通过压力传感器的信号输出来判定工件是否有泄漏,并可根据单位时间内压力传感器输出的变化值来计算出其泄漏率。干式检测法有液压丈量法、流量检漏法、压差检漏法、负压丈量法、氦气检漏法等,其测试效率高,不受主观因素影响,而且测试后不需要对工件进行其他处理,克服了水没法的缺点。同时,干式检测法可定量评测工件的泄漏状态,并可方便地纳人零件的自动化加工线或流水线使用,不足之处是在通常情况下无法确定发生泄漏的部位。
气密性检测装置可以广泛应用于各行业,可对各种有气密性检测要求的产品进行检测试验(汽车水箱、阀门、管道、气枕、游泳圈、气垫床、安全气囊、密闭工作间、消防器材、车辆内胎、蓄电池外壳、胶管)。
相关文章:气密性检测装置气体互换工作流程
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发布时间:
2014-09-14
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