CN201606994U

CN201606994U - Muffling air duct

Info

Publication number: CN201606994U
Application number: CN2010201024142U
Authority: CN
Inventors: 任小平
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-01-27
Filing date: 2010-01-27
Publication date: 2010-10-13
Anticipated expiration: 2020-01-27

Abstract

The utility model discloses a muffling air duct, which comprises an outer shell plate, sound-absorbing material and an inner sound-absorbing orifice plate corresponding to the shape of the outer shell plate; the inner sound-absorbing orifice plate and the outer shell plate are assembled by a groove-shaped keel to form a closed cavity; the sound-absorbing material is filled in the cavity; , a surface protecting layer is coated on the outer surface of the sound-absorbing material; the section of the outer shell plate is circular; and the cross section of the outer shell plate is rectangular. The utility model has simple structure, can set the pipeline of the muffling air duct into a bend pipe; what is more, the cross section size in the muffling air duct is totally equal to the size of an original air duct; , no any barrier is arranged in the pipe, and the circulation thereof is basically consistent with that of a common air duct; , and in addition, the muffling volume of the muffling air duct is increased with the increasing length, and the muffling air duct can be widely applied to air pumping and exhausting pipes or central air-conditioning air supply systems, and play the roles of muffling and muting.

Description

A kind of noise elimination airduct

Technical field

The utility model relates to a kind of silencing apparatus, relates in particular to a kind of noise elimination airduct that is used for abating noises.

Background technology

The pipeline silencer is a noise elimination noise reduction equipment commonly used in the central air conditioning air pipeline, and its effect is to subdue the interference of the airborne noise of the generation of ventilating to people's living environment, keeps the low noise quality of inhabitation, working environment.Bend muffler is the elbow of liner sound-absorbing material, sound wave there is remarkable attenuation, acoustic attenuation wherein is made up of three parts: nearly axial wave is in the absorption and the reflection of bend wall, and closely the energy of axial wave changes the energy of oblique wave into and is effectively absorbed by sound-absorbing material when turning round, but existing bend muffler and noise elimination airduct are provided with separately mostly, connection problem can occur when causing using.Be the aerodynamic noise that reduces blower fan and ventilation shaft at present on ventilation shaft, generally adopt the silencer of nearly half stifled form, there is not technological innovation for many years, though this class silencer can play certain noise elimination effect, but still have the deficiency that sound deadening capacity is little and resistance is big, especially air quantity and wind speed there are tangible influence.In addition, be provided with internal structure mostly in the existing airduct silencer, so not only increased the materials of whole noise elimination airduct, and its internal structure makes the silencer resistance increase, cause the poor effect that circulates, the effect of playing noise elimination that can not be unobstructed fully, because it has internal structure, so the length of its noise elimination airduct is fixed, can not increase along with actual needs, therefore, existing airduct silencer can not be fit to many to the demanding occasion use of eliminating the noise.

The utility model content

At above-mentioned the deficiencies in the prior art part, the utility model provides a kind of straight tube, bend pipe be arranged to, and the noise elimination airduct that the noise elimination process is unobstructed, resistance is little and sound deadening capacity strengthens with length can effectively solve the problem that above-mentioned prior art exists.

To achieve these goals, the technical solution adopted in the utility model is: disclose a kind of noise elimination airduct, it comprises Shell Plate, sound-absorbing material, the interior sound absorption orifice plate corresponding with the Shell Plate shape, form sealed hollow with the trough keel assembling between interior sound absorption orifice plate and the Shell Plate, described sound-absorbing material fills in this cavity, is covered with armour layer at the outer surface of sound-absorbing material.

As preferably, the cross section of described Shell Plate is circular.

Preferred as another, the cross section of described Shell Plate is a rectangle.

When the length of noise elimination airduct equaled three times of airduct sectional dimension, the length of the airduct of eliminating the noise this moment was fundamental length, and the 10dB sound deadening capacity will be arranged, and airduct sectional dimension of every increase promptly increases sound deadening capacity 6dB on the basis of noise elimination airduct length at fundamental length.

Compared with prior art, the beneficial effect that this utility model is brought is: this utility model is simple and reasonable for structure, the pipeline of noise elimination airduct can be provided with its length as required, also can be arranged to bend pipe as required, sectional dimension equates fully with former airduct size in the noise elimination airduct, no any resistance thing in the pipe, its circulation and common airduct basically identical, the sound deadening capacity of this noise elimination airduct strengthens with the increase of length, therefore, this noise elimination airduct can be widely used in play a part in pumping, ventilation pipe or the central air-conditioning supply air system to eliminate the noise quiet.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the cross section structure schematic diagram of the utility model embodiment 1;

Fig. 3 is the cross section structure schematic diagram of the utility model embodiment 2.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and the specific embodiments.

This noise elimination airduct comprises Shell Plate 1, interior sound absorption orifice plate 2, sound-absorbing material 3, armour layer 4 and trough keel 5, the shape of interior sound absorption orifice plate 2 is corresponding with the shape of Shell Plate 1, form sealed hollow 6 with trough keel 5 according to concrete size assembling between interior sound absorption orifice plate 2 and the Shell Plate 1, described sound-absorbing material 3 fills in this cavity 6, is covered with armour layer 4 at the outer surface of sound-absorbing material 3.Wherein, described sound-absorbing material 3 can be fibrous material, putty material etc., and in the practical operation, mineral wool or mineral wool in the fibrous material commonly used are used as sound-absorbing material.The medial surface of sound absorption orifice plate 2 is of a size of composite thickness in described between Shell Plate 1 lateral surface, the size of composite thickness is determined according to the size of noise, when noise is in 70-80dB, composite thickness is 60mm, when noise is in 81-90dB, composite thickness is 80mm, when noise more than 91dB, composite thickness is 100mm, sound absorption by the sound-absorbing material 3 between Shell Plate 1 and the interior sound absorption orifice plate 2 reduces the noise magnitude, the function of realize eliminating the noise, noise during by the noise elimination airduct by sound-absorbing material 3 attenuations by absorption, the length of tube increase and increasing with the wind of its attenuation.

Embodiment 1, as shown in Figure 1, 2, the cross section of described Shell Plate 1 is a rectangle, there is the 10dB sound deadening capacity in the length of its Shell Plate 1 cornerwise three times of the airduct cross section that equals to eliminate the noise, and this sound deadening capacity is basic sound deadening capacity, in addition, the adjustable according to the actual needs sound deadening capacity that increases, its mode of operation are promptly to increase sound deadening capacity 6dB according to cornerwise length in airduct cross section of the every increase of the length of noise elimination airduct.

Embodiment 2, shown in Fig. 1,3, the cross section of described Shell Plate 1 is circular, the length of its Shell Plate 1 equal to eliminate the noise three times of airduct diameter of section have the 10dB sound deadening capacity, and this sound deadening capacity is basic sound deadening capacity, in addition, the adjustable according to the actual needs sound deadening capacity that increases, its mode of operation be, promptly increases sound deadening capacity 6dB according to the length of an airduct diameter of section of the every increase of the length of noise elimination airduct.

The above is a better embodiment of the present utility model; be not to be that the airduct of the utility model will being eliminated the noise is confined in the described concrete structure and the scope of application, so every the corresponding modify and equivalent that might be utilized all belongs to the protection domain that the utility model is applied for a patent.

Claims

1. noise elimination airduct, comprise Shell Plate (1) and sound-absorbing material (3), it is characterized in that: also comprise the interior sound absorption orifice plate (2) corresponding with Shell Plate (1) shape, form sealed hollow (6) with trough keel (5) assembling between interior sound absorption orifice plate (2) and the Shell Plate (1), described sound-absorbing material (3) fills in this cavity (6), is covered with armour layer (4) at the outer surface of sound-absorbing material (3).

2. a kind of noise elimination airduct according to claim 1 is characterized in that: the cross section of described Shell Plate (1) is for circular.

3. a kind of noise elimination airduct according to claim 1 is characterized in that: the cross section of described Shell Plate (1) is a rectangle.