CN2694424Y

CN2694424Y - Sound screen

Info

Publication number: CN2694424Y
Application number: CN 200420026343
Authority: CN
Inventors: 张荣初
Original assignee: 陈月萍
Priority date: 2004-04-16
Filing date: 2004-04-16
Publication date: 2005-04-20
Anticipated expiration: 2014-04-16

Abstract

The utility model discloses a sound shield, whose shield body is composed of a supporting dragon frame and a group of sound absorbing monomers arranged in the supporting dragon frame. The sound absorbing monomers are made of micro-boring sheet material and sound absorbing material, which is filled in the micropunch sheet material. Each sound absorbing monomer is evenly arranged on the supporting dragon frame forming 7 degrees at vertical direction. Compared with the old technology, the sound shield reduces the space of reverberant sound field, and has good noise decreasing effect and maximal market potential.

Description

Sound barrier

One, technical field

The utility model relates to a kind of sound barrier that noise is used that reduces.

Two, background technology

At present, the sound barrier product of domestic comparative maturity has: the SHP-W series micropunch absorbent lined barrier of Shanghai Shenhua Acoustics Equipment Co., Ltd. and Tongji University's cooperative development, the GYB series sound barrier product of BJ Municipal Engin Machinery Works's research and development, FZP Noise-proof screen series of products of environmental protection scientific and technological consulting services center, Shanghai City development or the like.

Find that by repeatedly on-site land survey and market study what present domestic sound barrier adopted is traditional installation method aspect mounting structure, be mainly the semi-transparent type of upright arc, upright arc light-transmission type, semiclosed light-transmission type and the upright light tight type of arc.Common feature between them is: middle screen body all is that upright shape is installed, and road noise barrier sound insulation and noise reducing sound effective value is generally 5～9dB.Along with development and national economy, the continuing to increase of Forecast of Urban Traffic Flow and urban construction, noise figure is hurried longly, and the shortcoming of existing sound barrier is: it is poor to reduce noise effects.Adopt original sound absorption and insulation screen body installation method control noise, can not reach desirable effect.

Three, summary of the invention

The purpose of this utility model provides a kind of good sound barrier of noise effects that reduces.

The purpose of this utility model is achieved like this: a kind of sound barrier, comprise the screen body, described screen body is made up of support keel frame and the sound absorber that is arranged in the support keel frame, this sound absorber is made of micropunch sheet material and acoustic absorbant, acoustic absorbant is filled in the micropunch sheet material, it is characterized in that: described sound absorber becomes the angle of inclination to be installed in the support keel frame with vertical direction.Wherein, sound absorber can be formed by one group of sound absorption combination of monomers, and each sound absorption monomer be arranged in parallel along support keel frame direction in the vertical.

According to the reflection law of sound wave as can be known: incident angle equals reflection angle, change the setting angle of screen body, the incident angle of sound wave is changed relatively, huge change also can take place in the acoustic reflection angle, learn that through calculating adopt the oblique type of 7 ° of angle methods of gradient that the screen body is installed, the reflection angle that relatively vertically shields the same position of body reduces 14 °, reduced the reverberant field space like this, increased sound barrier the Noise Control scope.In the utility model, the pitch angle of each sound absorption monomer and vertical direction is 7 degree.

Compared with prior art, the utility model is according to the reflection law of sound wave, change the setting angle of sound absorption monomer, the incident angle of sound wave is changed, the acoustic reflection angle is also along with changing, by calculating, adopt 7 ° of oblique types of angle method of gradient that each sound absorption monomer is installed, the screen body of whole like this sound barrier is longitudinally formed by the sound absorption monomer at 7 ° of angles of a plurality of inclinations, compares with the vertical installation of each sound absorption monomer, and the reflection angle of same position reduces by 14 degree, its advantage is: the reflection direction that has changed sound wave, reduce the space of reverberant field, increased sound barrier to the Noise Control scope, it is good to reduce noise effects.

Four, description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is a single sound absorption monomer synoptic diagram in the utility model.

Five, embodiment

A kind of sound barrier described in the utility model, the bottom of sound barrier is the thick organic glass transparent screen of 4mm, the top of sound barrier is an arc screen body, sound absorber 3 is combined by one group of sound absorption monomer 4, each sound absorption monomer 4 constitutes by micropunch sheet material and acoustic absorbant, acoustic absorbant is filled in the micropunch sheet material, each sound absorption monomer 4 be arranged in parallel along support keel frame 2 directions in the vertical, and each sound absorption monomer 4 all becomes the angle of inclination to be installed in the support keel frame 2 with vertical direction, and each sound absorption monomer 4 is 7 degree with the pitch angle of vertical direction.

For obtaining 7 degree angle sound barriers described in the utility model, at first will shielding body 1, to make the side be oblique member, uses the CNC shearing machine blanking, the numerical control bender foldable type, form oblique type support keel frame 2 with electric resistance welding method, micropunch sheet material is covered fill required acoustic absorbant again.Screen body 1 inserts H shaped steel (model is that tow sides are with spring card 5 fixing chuckings, and are fixing with bolt 6 between screen board and column among the 150mm * 150mm) during installation.

According to the reflection law of sound wave as can be known: incident angle equals reflection angle, changes the setting angle of screen body, and the incident angle of sound wave is changed relatively, and the acoustic reflection angle also can change thereupon.Incident acoustic wave reduces 7 ° to the incident angle of gobo body, the reflection angle of reflective sound wave also increases thereupon and reduces 7 °, when the sound wave of same sound source respectively with 60 ° to vertical screen body and 7 ° the screen body incident of tilting, through calculating, the reflection of vertical screen body equates to be 60 ° with incident.The reflection angle of the screen body that tilts is 53 °, is 46 ° then with respect to the reflection angle of the same position of vertical screen body, has reduced 14 °.

Show that more than the gradient at 7 ° of angles is installed the reflection angle that makes sound wave bigger change is taken place, thereby has changed the reflection direction of sound wave, the space of reducing reverberant field has increased sound barrier to the Noise Control scope.

Below be that the sound absorption and insulation amount that the gobo body is measured in reverberation chamber according to sound barrier and domestic several families product of the oblique type installation in 7 degree angles compares:

Sequence number	Manufacturer	The name of product oise insulation factor	The third-octave center is Hz frequently
			The third-octave center is Hz frequently															100	125	160	200	250	315	400	500	630	800	1000	1250	500	2000	2500
			1	BJ Municipal Engin Machinery Works	GYB type sound barrier	17.2	19.5	20.2	20.2	21.4	24.8	26.8	29.1	30.6	34.3	36.3	38.3	100	125	160	200	250	315	400	500	630	800	1000	1250	500	2000	2500	39.5	41	41.8
2	Shanghai Shenhua Acoustics Equipment Co., Ltd.	SHP-W type micropore absorbent lined barrier	1	BJ Municipal Engin Machinery Works	GYB type sound barrier	17.2	19.5	20.2	20.2	21.4	24.8	26.8	29.1	30.6	34.3	36.3	38.3	14	16	12	14	14	17	20	22	23	27	30	30	34	34	34	39.5	41	41.8
2	Shanghai Shenhua Acoustics Equipment Co., Ltd.	SHP-W type micropore absorbent lined barrier	3	Nanjing ChangRong noise control Environment Protection Engineering Co., Ltd	CR-SB-I type sound barrier	21.4	22.3	21.4	26.2	29.8	31.6	30.5	34.1	39	35.7	42.8	40.8	14	16	12	14	14	17	20	22	23	27	30	30	34	34	34	42.5	42	42.7

Claims

1, a kind of sound barrier, comprise screen body (1), described screen body (1) is made up of support keel frame (2) and the sound absorber (3) that is arranged in the support keel frame (2), this sound absorber (3) is made of micropunch sheet material and acoustic absorbant, acoustic absorbant is filled in the micropunch sheet material, it is characterized in that: described sound absorber (3) becomes the angle of inclination to be installed in the support keel frame (2) with vertical direction.

2, sound barrier according to claim 1 is characterized in that: described sound absorber (3) can be combined by one group of sound absorption monomer (4), and each sound absorption monomer (4) be arranged in parallel along support keel frame (2) direction.

3, sound barrier according to claim 2 is characterized in that: each sound absorption monomer (4) is 7 degree with the pitch angle of vertical direction.