Leshan acoustic test tube manufacturer Leshan's best quality acoustic test tube manufacturer also belongs to Lianye

乐山声测管：

乐山声测管

乐山声测管：

乐山声测管

乐山声测管：

乐山声测管

Leshan acoustic pipe manufacturer nationwide delivery Leshan pile foundation acoustic pipe Leshan acoustic pipe manufacturer spot Leshan acoustic pipe manufacturer Leshan acoustic pipe manufacturer price Leshan acoustic pipe manufacturer specifications Reinforced cage should be prevented from twisting when placed in the pile hole, Leshan Acoustic tube manufacturers generally install them in sections along with steel cages. Fix the Leshan acoustic pipe manufacturer with the bottom cover on the first section of the steel cage, and temporarily fix the rest on the prepared steel cage to be lowered. When lowering the steel cage, connect the previous section of the Leshan acoustic pipe manufacturer After plugging it in, tie the Leshan acoustic pipe manufacturer to the steel cage at the same time, and do it in sequence. The joint between each section can use a reverse-threaded sleeve interface or a casing welding solution. The reverse-threaded sleeve joint should use a soft rubber sealing ring. A long steel sleeve can be selected for the casing connection, with an inner diameter slightly larger than Leshan. According to the outer diameter of the acoustic pipe manufacturer, put two Leshan acoustic pipe manufacturers together, and use electric welding to weld the upper and lower ends of the sleeve to the Leshan acoustic pipe manufacturer. No matter which joint scheme is used, it must ensure that the joint has sufficient strength to ensure that the Leshan acoustic pipe manufacturer will not bend and break away under high hydrostatic pressure. The joint part should be dense and leak-free. The inner wall of the joint should be kept flat and there should be no welds. Remove slag, burrs and other objects so as not to hinder the free movement of the transducer. If the Leshan acoustic pipe manufacturer needs to cut it off, it should be cut with a cutting machine. After cutting, the pipe mouth should be polished to eliminate internal and external burrs. When it is not suitable to burn the welding steel bars with electric welding, the welding liquid should be avoided from splashing on the pipe body or joints.
Selection of Leshan Acoustic Detection Pipe Manufacturer
The selection of materials for Leshan Acoustic Detection Pipe Manufacturer is based on the principles of greater sound transmittance, easier installation and lower cost. The acoustic pulse is emitted from the transmitting transducer, reaches the interface between the water and the pipe wall of the Leshan acoustic detection pipe manufacturer through the coupling water, and then passes through the pipe wall to the interface between the acoustic detection pipe wall and the concrete. After passing through the concrete, it needs to pass through another The two interfaces of Leshan acoustic measurement tube manufacturer reach the receiving transducer. Therefore, Leshan acoustic measurement tube manufacturer forms an interface, and the sound energy transmission coefficient of each interface can be calculated according to the following formula: The sound energy transmission coefficient of a certain interface in the formula The acoustic impedance rate of the medium on both sides of the interface is transmitted and received The total sound transmission coefficient of the interface between the transducers is. Currently, commonly used pipes include steel pipes, steel corrugated pipes, and plastic pipes. The advantage of the steel pipe is that it is easy to install. It can be welded to the steel frame by electric welding, which can replace part of the steel bar section. Moreover, because the steel pipe has a large stiffness, it can basically maintain its parallelism and straightness after installation. At present, many large-diameter cast-in-place piles are made of steel. Leshan acoustic test tube manufacturer. However, steel pipes are more expensive. Steel corrugated pipes are a better material for Leshan acoustic pipe manufacturers. They have the characteristics of thin pipe walls, less steel, high impermeability and compressive strength, and good flexibility. They are usually used in prestressed structures. When the holes reserved by the post-tensioning method are used as Leshan acoustic pipe manufacturers. It can be tied directly to the steel frame soil, and the joints can be connected with one size larger corrugated socket. Because the bellows is very light, it is very easy to operate, but care must be taken to keep its axis straight during installation. Plastic pipes have a low acoustic impedance and have a large sound transmittance when used as Leshan acoustic pipe manufacturers. They can usually be used for smaller cast-in-place piles. Caution should be used when using them in large cast-in-place piles because large diameter piles require a large amount of concrete to be poured. , the heat of hydration of cement is not easy to dissipate. Since the thermal expansion coefficient of plastic is very different from that of concrete, after the concrete solidifies, the plastic pipe will shrink radially and longitudinally due to the temperature drop, which may cause it to partially separate from the concrete and cause air or water leakage. The cracks add more strongly reflective interfaces to the sound path, which can easily lead to misjudgment. The diameter of the Leshan acoustic measuring tube manufacturer is usually larger than the diameter of the radial transducer, and the common specification is the inner diameter. The wall thickness of the pipe has little impact on the sound transmission. Therefore, in principle, there is no limit on the thickness of the pipe wall. However, from the perspective of saving steel, as long as the pipe wall can withstand the lateral pressure of newly poured concrete, the thinner it will be. More provinces.
Leshan acoustic test tube manufacturer Leshan’s best quality acoustic test tube manufacturer also belongs to Lianye