At present, the acoustic tube materials commonly used in the market mainly include steel pipes, bellows pipes and plastic pipes. Each of them has its own advantages and disadvantages, and it is better to select which material to use the sound measuring tube according to the use.
At present, the acoustic tube materials commonly used in the market mainly include steel pipes, bellows pipes and plastic pipes. Each of them has its own advantages and disadvantages, and it is better to select which material to use the sound measuring tube according to the use.
First of all, let's introduce the bellows. It is the most commonly used acoustic tube material. It has the characteristics of thin wall, steel and impermeability, pressure resistance, high strength and flexibility. It has the advantages of steel tube and plastic tube. When using a bellows to make a sound tube, it can be directly tied to the steel frame soil, and the joint can be spliced ​​with a large one. Since the bellows is very light, it is very convenient to operate, but care should be taken to keep its axis straight during installation. The second is the introduction of steel pipe material, the steel pipe can be directly welded, the installation is more convenient, and because of its tough rigidity, its parallelism and straightness will not change after embedding, but the price is relatively expensive.
Finally, the plastic sound tube is introduced. The sound transmission rate of the plastic tube is the largest. It is more common in the smaller cast-in-place piles. Because large-scale piles need to be filled with a large amount of concrete when installed, the hydration heat of the cement is not easy to diverge. The thermal expansion coefficient of plastic is very different from that of concrete. After the concrete solidifies, the plastic pipe shrinks radially and longitudinally due to the temperature drop. It may cause the concrete to be partially disengaged and cause air or water to be sewn, which increases the sound path. More reflective interfaces are more likely to cause false positives.
Zhangzhou Lianyu Steel Pipe Co., Ltd.
15231769003
0317-2012503
Http://news.chinawj.com.cn
Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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