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Sound insulation structure comprising air interlayers and capable of insulating sound and ventilating at same time

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

Active Publication Date: 2021-08-13
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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  • Sound insulation structure comprising air interlayers and capable of insulating sound and ventilating at same time
  • Sound insulation structure comprising air interlayers and capable of insulating sound and ventilating at same time
  • Sound insulation structure comprising air interlayers and capable of insulating sound and ventilating at same time

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] As shown in Figure 1(a), the overall shape of the sound insulation structure in this embodiment is the staggered arrangement of grooved perforated plates, that is, the shell 1 is cylindrical, the diameter of the shell 1 is 29.8mm, and the thickness is 30mm. 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 o...

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 sound insulation structure containing air interlayers and capable of insulating sound and ventilating at the same time. The sound insulation structure is characterized in that the sound insulation structure comprises a shell (1) and a plurality of layers of perforated plates (11) arranged in the shell (1), grooves (12) are formed in one sides of the perforated plates (11), and the sides, provided with the grooves, of the perforated plates (11) face a noise source; an air interlayer (13) is arranged between every two adjacent perforated plates (11) in a staggered mode according to the perforated positions, the staggered arrangement is that every two adjacent perforated plates (11) are staggered in the two mutually perpendicular perforated directions according to the relative positions of the perforated holes, and the staggered distance is half of the distance between the perforated holes; the perforated plates (11) are perforated at equal intervals, and the perforated section of the perforated plates is square or round; the grooves (12) are formed in one side of the perforated plates (11) according to two perforating directions which are perpendicular to each other; and the distance between the grooves (12) is equal to the perforation distance of the perforated plates.

Description

technical field [0001] The invention relates to the technical field of sound insulation, in particular to a sound insulation structure containing an air interlayer and capable of sound insulation and ventilation. 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 insulation ...

Claims

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Application Information

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