High speed railway sound barrier metal composite efficient sound absorbing and isolating plate

Abstract

The invention relates to the technical field of sound barriers, and discloses a high speed railway sound barrier metal composite efficient sound absorbing and isolating plate mainly designed for solving the problem that an existing railway sound barrier is low in low-frequency sound absorbing coefficient. The high speed railway sound barrier metal composite efficient sound absorbing and isolating plate comprises an aluminum alloy frame, a back plate poured in the aluminum alloy frame, sound absorbing cotton wrapped by hydrophobic non-woven fabrics, a perforation panel and perforation sheets. The aluminum alloy frame is composed of an upper beam, a lower beam, a left seal plate and a right seal plate. The left seal plate and the right seal plate are connected to the left ends and the right ends of the upper beam and the lower beam through self drilling screws correspondingly, two I-shaped combined keels are arranged in the aluminum alloy frame, the upper ends of the I-shaped combined keels are connected with the upper beam through self drilling screws, the lower ends of the I-shaped combined keels are connected with the lower beam through self drilling screws, and the interior of the frame is divided into three sections through the I-shaped combined keels. Each section is internally provided with the corresponding perforation sheet and the sound absorbing cotton covered with the hydrophobic non-woven fabrics. The upper end and the lower end of the perforation panel stretch into perforation panel installing grooves. The high speed railway sound barrier metal composite efficient sound absorbing and isolating plate has the advantage that the sound absorbing coefficient of the assigned frequency is improved.

Description

[0001] Technical field: [0002] The invention relates to the technical field of sound barriers, in particular to a high-speed railway sound barrier metal composite high-efficiency sound-absorbing and insulating board. [0003] Background technique: [0004] Railway noise barrier is a special facility for railway noise prevention and control. It has both protection and landscape functions. There are mainly two types: integral type and plug-in type. [0005] The plug-in railway sound barrier is composed of H-shaped steel columns and unit plates, that is, several sound barrier unit plates are inserted between two H-shaped steel columns, and noise is prevented by sound absorption and sound insulation on both sides of the railway. The structure should be strong to play a protective role, and the appearance combination should be beautiful to form a landscape effect. [0006] The existing plug-in type railway sound barrier unit boards are divided into two categories: metal and non-m...

AI Technical Summary

Problems solved by technology

For example, the patent number is 200920096902.4, and the utility model patent named "high-speed railway metal sound barrier unit board" has the disadvantages of complex processing technology, poor integrity, high cost, easy deformation, and short service life.

The patent number is 201320395779.2, and it is a utility model patent named "a metal sound barrier unit plate for high-speed railway"; its disadvantages are: high cost, small sound insulation, poor integrity, easy deformation, and short service life

Its disadvantages are: low strength, high surface density, short life

The disadvantages are that the process is complicated, the external sound-absorbing material is easily damaged, the impact resistance is poor, the surface density is high, the cost is high, and the low-frequency sound absorption effect is poor.

[0014] (3) Prestressed reinforced concrete is used to pour the back plate with a cavity to improve the sound absorption coefficient and form a hollow plate sound barrier. The disadvantage is that although the sound absorption coefficient has been compensated, the process is very complicated and the surface density High, higher cost, easy damage to external sound-absorbing materials, poor impact resistance, etc.

[0016] The sound-absorbing structure of the existing sound-absorbing unit board is single, and the sound-absorbing material is placed in the center of the screen body, and the space in the screen body is not fully utilized as an effective sound-absorbing space. Low sound absorption coefficient

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