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检测翅片管质量是否合格的两种最好方法

发布日期:2019-10-26 浏览次数:14

翅片管质量的好坏应该怎么进行检验?翅片管通俗的讲就是一种换热管,主要功能是提高换热效率,通常在换热管的表面通过加翅片,增大换热管的外表面积(或内表面积),从而达到提高换热效率的目的,翅片管的检测方法是我们并不了解的,对此翅片管网专家表示说主要有两种方法,详细介绍如下:

How should the quality of finned tube be inspected? Generally speaking, finned tube is a kind of heat exchange tube. Its main function is to improve the heat transfer efficiency. Usually, by adding fins on the surface of the heat exchange tube, the outer surface area (or inner surface area) of the heat exchange tube is increased, so as to achieve the purpose of improving the heat transfer efficiency. The detection method of finned tube is unknown to us. Experts on finned tube network have no idea about it. There are two main ways of saying: 预埋检测翅片管的方法解析:

The method of embedded inspection of finned tube is analyzed.

(1)桩径0.6-0.8m应埋设双翅片管;桩径0.8-2.0m应埋设三根翅片管;桩径2.0m以上应埋设四根翅片管,根据赤峰桥具体情况,桩基可埋设三根翅片管。

(1) Double-finned pipes should be embedded in the pile diameter of 0.6-0.8 m, three finned pipes should be embedded in the pile diameter of 0.8-2.0 m, and four finned pipes should be embedded in the pile diameter of 2.0 m or more. According to the specific conditions of Chifeng Bridge, three finned pipes can be embedded in the pile foundation.

(2)声波检测翅片管宜采用钢管、塑料管或钢质波纹管,其内径宜为50~60mm。检测翅片管连接处应光滑过渡,翅片管口应高出桩顶100mm以上,且各检测翅片管管口高度应一致,管的下端应封闭,上端应加盖,翅片管内不得有异物,翅片管身不得有破损。

(2) Steel pipe, plastic pipe or steel bellows should be used for acoustic finned tubes, and their inner diameter should be 50-60 mm. The joint of the finned tube should be smooth transition, the finned tube mouth should be higher than 100 mm above the pile top, and the height of each finned tube mouth should be the same, the lower end of the tube should be closed, the upper end should be covered, there should be no foreign body in the finned tube, and the finned tube body should not be damaged.

(3)检测翅片管可焊接或捆扎在钢筋的内侧,检测翅片管之间应互相平行。

(3) the finned tube can be welded or tied into the inner side of the steel bar, and the finned tubes should be parallel to each other.


购买翅片管的现场检测方法

Field inspection method for purchase finned tube

(1)现场检测前测定声波监测仪发射至接受系统的延迟时间t。并计算声时修正值。

(1) determine the delay time t of the sonic monitor transmitting to the receiving system before field testing. And calculate the correction time of sound time.

(2)测量时发射与接收探头应以相同标高或保持固定高差同步升降。

(2) when measuring, the transmitting and receiving probes should synchronously rise or fall at the same elevation or maintain a fixed height difference.

(3)测量点距为40cm,当发现异常时再加密到20cm.

(3) the measuring point distance is 40cm, and when it is found abnormal, it will be encrypted to 20cm..

(4)选择适当的发射电压和放大器增益,并再测试过程中保持不变。

(4) choose the appropriate transmit voltage and amplifier gain, and then remain unchanged during the test.

(5)实时显示和记录接收信号的时程曲线。

(5) display and record the time history curve of received signal in real time.

(6)将多根翅片管以两根为一个检测剖面进行全组合,分别对多有剖面完成检测。

(6) The detection profiles of multiple finned tubes are composed of two finned tubes, and the detection of multiple finned tubes is completed separately.

(7)每组检测管测试完成后,测试点应随机重复抽测10%,其声时相对标准差不应大于5%;波幅相对标准差不应大于10%。

(7) After each group of test tubes is completed, the test points should be sampled randomly and repeatedly for 10%, the relative standard deviation of sound time should not be greater than 5%, and the relative standard deviation of wave amplitude should not be greater than 10%.


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