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Groove type perforated plate staggered soundproof structure with air interlayers

A technology of staggered arrangement and air interlayer, applied in the direction of sound insulation, building components, noise absorption devices, etc., can solve the problems of energy consumption, complex overall structure, etc., achieve the effect of increasing scattering, improving sound insulation performance, and wide application area

Inactive Publication Date: 2018-08-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent with the application number 201611093387.5 proposes a staggered sound insulation structure in which passive sound insulation units and active sound insulation units are mixed. It already has the functions of ventilation and heat dissipation, but it still has active units. The addition of active units makes The overall structure is relatively complex and consumes energy when used, so it is not suitable for underdeveloped areas

Method used

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  • Groove type perforated plate staggered soundproof structure with air interlayers
  • Groove type perforated plate staggered soundproof structure with air interlayers
  • Groove type perforated plate staggered soundproof structure with air interlayers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 As shown in a, the overall shape of the sound insulation structure with staggered slot-type perforated plates in this embodiment, that is, the shell 1 is cylindrical, the diameter of the shell 1 is 29.8 mm, and the thickness is 30 mm. Its overall shape and thickness can be made according to actual engineering requirements. This embodiment includes a housing 1 and several layers of perforated plates 11 arranged in the housing 1 , and two adjacent perforated plates 11 are arranged alternately and provided with an air interlayer 13 . A plurality of grooves 12 are arranged on one side of the perforated plate according to two perforating directions perpendicular to each other. Among them, the thickness of the perforated plate is 2mm; the perforated section is square, and the square side length is 1mm; the perforation spacing of the perforated plate is 3mm; the groove width is 0.8mm, the depth is 0.8mm; the thickness of the air interlayer is 1mm. The outerm...

Embodiment 2

[0028] In this embodiment, the overall shape of the sound insulation structure with staggered arrangement of slot-type perforated plates is cylindrical, the diameter of the sample is 29.8 mm, and the thickness is 60 mm. In this embodiment, a sound insulation structure arranged in rows of grooved perforated plates is selected as a comparison, and its overall shape is cylindrical and its thickness is 60 mm.

[0029] The SW477 impedance tube manufactured by Beijing Shengwang Shengdian Technology Co., Ltd. was used to test the transmission loss of the staggered arrangement of slot-type perforated plates and the sound insulation junctions of the parallel arrangement involved in Example 2. The test frequency range is 1000Hz-6300Hz. During the test, the side of the sample with the groove faces the noise source.

[0030] Figure 5 When the shape is the same (the sample diameter is 29.8mm and the thickness is 60mm), the transmission loss of the staggered arrangement of slot-type perf...

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Abstract

The invention discloses a groove type perforated plate staggered soundproof structure with air interlayers. The structure comprises perforated plates, grooves and the air interlayers, and the perforated plates are in staggered arrangement according to perforating positions. The structure has advantages of ventilation, heat dissipation, light weight and freeness of energy consumption while a soundproof effect is achieved. In implementation, one side, with the grooves, of the groove type perforated plate staggered soundproof structure faces a noise sound. The perforated plates intrinsically havecertain soundproof performance, reflection of incident sound waves can be improved by the grooves, and the soundproof performance is further improved. A soundproof frequency range can be expanded bythe air interlayers, the perforated plates are staggered according to the perforating positions, and accordingly scattering and friction of sound waves in the structure can be increased to result in high loss, and the soundproof performance is further improved.

Description

technical field [0001] The invention relates to the technical field of sound insulation, in particular to a sound insulation structure with staggered arrangement of slot-type perforated plates containing air interlayers. Background technique [0002] Traffic noise, social life noise, factory noise, construction noise, etc. are common noise sources, and noise threatens the physical and mental health of residents. With the improvement of living standards, people pay more and more attention to environmental quality, and noise has become a hot issue in the process of environmental governance. Sound insulation walls, sound insulation screens, sound insulation enclosures, etc. are often used to control the propagation of airborne sound, so that the noise is blocked in the transmission path, thereby reducing noise. Holes, etc. will affect the sound insulation effect of sound insulation walls, etc., so holes are generally not allowed on sound insulation components such as sound ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01F8/00E04B1/84
CPCE01F8/00E04B1/82
Inventor 屈治国张秀海
Owner XI AN JIAOTONG UNIV
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