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Sound absorbing and insulating barrier

A technology for sound absorption and sound insulation, which is used in noise absorption devices, buildings, etc., can solve the problems of fatigue damage of sound absorption and insulation panels, weak anti-vibration ability, and many stress cycles, etc., to achieve economical and environmental protection. Excellent, strong wind pressure resistance, less increase in static load

Active Publication Date: 2007-08-15
QINGDAO CREATE ENVIRONMENT CONTROL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the acceleration of people's life rhythm, the speed of motor vehicles is getting higher and higher. Many passenger rail vehicles have been speeded up to 200-250 km / h, and will even be speeded up to 300-350 km / h in the future. However, the suction partition currently used Due to the functional and economical requirements and the limitations of the installation structure, the sound barrier is usually made of light weight, large format, poor rigidity, and weak anti-vibration ability. When the vehicle passes at a low speed, it can meet the use requirements. But when the vehicle passes by at high speed, due to the change of air pressure, the alternating exciting force of pulling force and suction force will be formed, especially the entering and exiting wind pressure formed when the front of the vehicle enters and the rear of the vehicle leaves, causing strong vibration of the sound-absorbing barrier
On the one hand, the poor rigidity and small damping of the sound-absorbing and insulating panels will be amplified due to the resonance amplitude, and the number of stress cycles of each component will increase. Over time, it is easy to cause fatigue damage to the sound-absorbing and insulating panels; on the other hand, this This kind of strong vibration will cause great damage to the joints of the frame legs of the sound-absorbing barrier and even the bridges, road foundations or piers connected to it, such as breaking the joints of the legs, loosening the connecting bolts, and cracks in the concrete at the joints Even stripping, etc., seriously affect the service life of the sound-absorbing and insulating barrier, not only causing huge economic waste, but even threatening traffic safety and the safety of road infrastructure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The sound-absorbing and insulating barrier of the present invention as shown in Fig. 1 and Fig. 2 includes a supporting frame 1 and a sound-absorbing and insulating panel 2, and the sound-absorbing and insulating panel 2 is arranged in the supporting frame 1, between the supporting frame 1 and the base 5 An elastic element and a damping element are arranged in parallel, wherein the elastic element is a spring 3 and the damping element is a damper 4 . The support frame 1 and the base 5 are pre-tightly connected together by using anchor bolts 16 (not specifically shown in the figure) preset in the base 5 . In order to strengthen the bending rigidity of the bottom of the supporting frame, the lower part of the supporting frame is provided with oblique reinforcing ribs 17, so that the lower part of the supporting frame forms triangular outriggers.

[0027] When the external exciting force formed by vehicles passing or wind blowing acts on the sound-absorbing barrier, due to...

Embodiment 2

[0034] As shown in Figure 3, the difference between the sound-absorbing and insulating barrier of the present invention and Embodiment 1 is that a guiding device guide support 18 is provided between the legs of the support frame 1 of the sound-absorbing barrier and the base 5, and on the guide support 18 There are horizontal guide holes along the normal direction of the sound-absorbing and sound-insulating panel, so that the legs of the support frame can move horizontally relative to the guide support 18, and the corresponding springs 3 and dampers 4 are also arranged horizontally on the legs and the guide support. Between 18, guide support 18 and base 5 are fixedly connected with bolts.

[0035] After the sound-absorbing and insulating panel 2 bears the external excitation force, it drives the support frame 1 to elastically translate along the normal direction of the sound-absorbing and insulating panel, and its inertial mass balances most of the exciting force, while compress...

Embodiment 3

[0038] As shown in Figure 4, the difference between the sound-absorbing and insulating barrier of the present invention and the first embodiment is that a laminated rubber support 6 is arranged between the support frame 1 and the base 5, such as the patent No. ZL3112549 announced on September 7, 2005. The shock-isolation bearing described in the Chinese patent No. 2 can be regarded as an integration of elastic elements and damping elements.

[0039] The laminated rubber support 6 has great rigidity in the vertical direction, but has good elasticity in the horizontal direction, so it acts as a guide in the horizontal direction. Because it can achieve large horizontal shear deformation and limit the swing of the sound-absorbing and insulating barrier, it has guiding function, elastic function and damping function at the same time. Therefore, when the sound-absorbing and insulating barrier is subjected to external excitation force, the laminated rubber bearing 6. Large horizontal...

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Abstract

The invention relates to a shield besides road to adsorb noise, which comprises a sound adsorption shield and a support frame, wherein the shield plate and the support frame or / and support frame and the base are connected via flexible element or / and damping element, the flexible element and the damping element can be serially, parallel or integrally connected. The invention can improve sound adsorption ability and protect the base, with long service life, less increase on the load of road, and high safety or the like.

Description

technical field [0001] The invention relates to the fields of noise control and vibration control, and belongs to a sound absorption, sound insulation and vibration reduction device, in particular to a barrier for absorbing and isolating noise on both sides of a road and a railway. Background technique [0002] Various vehicles will generate strong noise when running on roads or railways. In order to reduce the impact of noise on production facilities, buildings and people's lives, suction absorbers are usually installed next to roads or railways that pass through bridges, residential areas or industrial areas. Sound insulation barrier to achieve sound insulation and noise reduction. With the acceleration of people's life rhythm, the speed of motor vehicles is getting higher and higher. Many passenger rail vehicles have been speeded up to 200-250 km / h, and will even be speeded up to 300-350 km / h in the future. However, the suction partition currently used Due to the functio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01F8/00
CPCE01F8/0023
Inventor 李凤娥
Owner QINGDAO CREATE ENVIRONMENT CONTROL TECH
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