The introduction of advanced German equipment and patented technology, products installed in many high-speed rail lines in China, China's high-speed rail noise barrier industry "leading enterprise".
On the spraying production line of JSRQ Sound Insulation Technology Corporation, we saw pieces of silver-gray aluminum-magnesium board structural parts test off the production line.
"This is the box board of the noise barrier." JSRQ production manager Ma Youfu introduced. The box board is 2 meters long and 50 cm wide. The noise barrier unit can be combined into a specified height by the construction party according to the requirements of the railway department to achieve the best noise reduction effect.
At present, the products produced by the company are mainly supplied to the "Ningju" high-speed rail line from Nanjing to Jurong, the "Changjinghuang" high-speed rail line from Nanchang to Huangshan in Jingdezhen, and Wuhan Metro Line 16.
China's rapid development of high-speed rail construction will usher in huge business opportunities for high-end noise barrier products.
At present, the company's products have covered China's Beijing-Tianjin high-speed rail, Zhengxi high-speed rail, Wuhan-Guangzhou high-speed rail, Shanghai-Nanjing high-speed rail, Shanghai-Hangzhou high-speed rail…
For the five first high-speed rail lines in China, the noise barrier facilities are all from JSRQ.
In recent years, China's high-speed rail has continued to increase its speed from 200 kilometers per hour to more than 350 kilometers per hour. In order to match the speed of high-speed rail, JSRQ's R&D team carried out a series of R&D and tests to produce upgraded noise barrier products.
The core of the sound insulation screen product is mainly the sound insulation and sound absorption of the inner core. Regardless of the speed of the high-speed rail, the sound absorption and sound insulation must be controlled within the specified range.
The typical technologies mainly include:
For example, in the sound control, the electric telescopic rod is used to lower the center of gravity of the sound barrier, so that the sound barrier is more stable;
Adjusting the angle of the noise reduction plate by the lifting of the electric telescopic rod, not only can be applied to different environments, but also can be effectively fixed;
The use of porous sound-absorbing materials has a good sound absorption effect on medium and high frequency noise, can effectively suppress the transmission of noise, and achieve a good noise reduction effect on noise in the low, medium and high frequency range;
Using foamed aluminum sound-absorbing material to replace the easily aging glass wool material, through the sound-absorbing cavity, a Helmhertz resonant cavity is formed. When the sound wave is incident, at the resonant frequency, a violent resonance effect occurs between the air and the internal space and the sound is lost. Yes, to achieve the effect of sound absorption and noise reduction.
The compression technology is used to effectively fix and protect the main body of the sound-absorbing panel, avoid bumps during the installation process to cause damage to the main body of the sound-absorbing panel, and improve the service life;
By adding Al (aluminum), Cu (copper), Zn (zinc), Si (silicon) and Mn (manganese) and other elements at the same time, the alloy elements such as Cu, Zn, Si and Mn are solid solution strengthened with Al to improve the sound-absorbing board The strength of the muffler can prevent the muffler from cracking and prolong the service life of the muffler.