CN202470088U

CN202470088U - Chimney silencer of gas-fired boiler

Info

Publication number: CN202470088U
Application number: CN 201220044312
Authority: CN
Inventors: 魏志勇
Original assignee: Beijing Municipal Institute of Labour Protection
Current assignee: BEIJING MUNICIPAL INSTITUTE OF LABOUR PROTECTION TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2012-02-10
Filing date: 2012-02-10
Publication date: 2012-10-03
Anticipated expiration: 2022-02-10

Abstract

The utility model relates to a gas-fired boiler chimney muffler, which is characterized in that it comprises a cylindrical shell, and the inner wall of the shell is concentrically provided with a sound-insulating outer sleeve and a sound-insulating inner sleeve, and the shell and the sound-insulating outer sleeve Between, and between the sound-insulating jacket and the sound-insulating inner jacket, several partitions are arranged at intervals, and a central sound-absorbing device is connected to the sound-insulating inner jacket, and one end of the sound-insulating inner jacket and the outer jacket are respectively arranged There are several water discharge holes; the two ends of the sound insulation inner sleeve are respectively connected to a tapered truncated cone-shaped interface, each of which is respectively provided with a flange connected to the chimney, and the outer wall of each of the said truncated cone-shaped interfaces is respectively provided with There are a number of stiffeners connecting the flange and the housing. The muffler can achieve an insertion loss of 14-18dB(A); the airflow velocity is less than 7 m/s, and the muffler resistance loss is less than 10Pa. The utility model can be widely used for noise reduction of gas boiler chimneys.

Description

A kind of gas fired-boiler chimney silencer

Technical field

The utility model relates to a kind of noise silencing apparatus, particularly about a kind of gas fired-boiler chimney silencer.

Background technology

General gas fired-boiler chimney noise is mainly produced by combustion fan noise, burner injection noise and burner hearth combustion noise, and its noise A sound level can reach more than the 90dBA, and noise is main with the 200Hz-800Hz medium and low frequency mostly; Be broadband character; Because medium and low frequency noise transmission distance, transmission capacity is strong, thereby causes people's health effect serious; And at present not to the gas fired-boiler chimney silencer of 200Hz-800Hz medium and low frequency noise, country is to the also unrestricted standard of boiler noise.In order to reduce the influence that this noise produces, when the silencer that existing others are used is used for the gas fired-boiler chimney, can there be following problem, the one, it is effective to eliminate the noise to 63Hz, 125Hz low frequency, and noise elimination frequency band is narrow; The 2nd, it is effective to eliminate the noise to the 200Hz-800Hz medium and low frequency, and the noise elimination drag losses is big; Three are to use the relatively poor equipment of medium and low frequency noise elimination effect, can not satisfy the noise elimination requirement.

Summary of the invention

To the problems referred to above, it is little that the purpose of the utility model provides a kind of noise reducing apparatus drag losses, the gas fired-boiler chimney silencer that medium and low frequency noise elimination effect is good.

For realizing above-mentioned purpose; The utility model is taked following technical scheme: a kind of gas fired-boiler chimney silencer, and it is characterized in that: it comprises a cylindrical shell, said inner walls is provided with cover in a sound insulation overcoat and the sound insulation with one heart; Between said housing and the sound insulation overcoat; And be provided with at interval through some dividing plates between the cover in said sound insulation overcoat and the said sound insulation, being connected with a center sound absorber in the cover in the said sound insulation, an end of the inside and outside cover of said sound insulation is respectively arranged with some dewatering orifices; The two ends of cover connect one respectively and are convergent taper type interface in the said sound insulation, and the flange of a connection chimney is set respectively on each said interface, and the outer wall of each said taper type interface is respectively arranged with the reinforcement gusset of said flange of some connections and said housing.

Said center sound absorber is a center sound absorption post, and said center sound absorption post is conical near an end of the inside and outside cover of said sound insulation dewatering orifice, and the plurality of support that said center sound absorption post is provided with through two ends connects in the said sound insulation overlaps.

Said center sound absorption post adopts thickness less than 0.8mm, and the aperture is less than 3mm, and as mask, be filled with unit weight in the said mask is 32kg/m to punching rate less than 30% orifice plate ³Centrifugally glass-wool.

Said center sound absorption post adopts thickness less than 0.8mm, and the aperture is less than 3mm, and as mask, be filled with unit weight in the said mask is 48kg/m to punching rate less than 30% orifice plate ³Centrifugally glass-wool.

It is 3mm that said gripper shoe adopts thickness, and width is the steel plate of 50mm.

Said center sound absorber is the sound insulation backplate of a decussate, and the external part of each said sound insulation backplate connects the inwall of cover in the said sound insulation respectively.

It is the acoustical plate of 50mm that said sound insulation backplate adopts thickness, and said acoustical plate adopts thickness less than 0.8mm, and the aperture is less than 3mm, and as mask, be filled with unit weight in the said mask is 32kg/m to punching rate less than 30% perforated plate ³Centrifugally glass-wool.

It is the acoustical plate of 50mm that said sound insulation backplate adopts thickness, and said acoustical plate adopts thickness less than 0.8mm, and the aperture is less than 3mm, and as mask, be filled with unit weight in the said mask is 48kg/m to punching rate less than 30% perforated plate ³Centrifugally glass-wool.

Less than 1mm, punching rate is made less than 3% microwell plate the inside and outside cover employing of said sound insulation thickness less than 1mm, aperture.

The utility model is owing to take above technical scheme; It has the following advantages: 1, the utility model is according to microwell plate sound absorption principle and sound-absorbing porous material sound absorption principle; Be provided with an inside and outside cover of sound insulation and a housing, the inside and outside cover that wherein insulates against sound all adopts microperforated panel, because the micropore air has the viscosity resistance effect; Therefore the acoustic energy of a part of incident is consumed, thereby can reach the noise elimination effect effectively.2, the utility model is because to be provided with an end be cone shape center sound absorption post or cross sound insulation backplate at the center of cover in sound insulation, and in the center absorbs sound the mask of post or cross sound insulation backplate, to be filled with unit weight be 32kg/m ³Or 48kg/m ³Sound-absorbing materials such as centrifugally glass-wool; One side makes a part of acoustic energy that gets into sound-absorbing material be converted into heat energy and is dissipated; Can improve the high frequency failure frequency on the other hand; Therefore can reach the purpose of broadening noise elimination frequency band, the sound wave that the inside and outside cover of sound insulation is reflected is absorbed sound by the other side again, makes this silencer can realize inserting and is lost between 14～18dB (A); Air velocity is less than 7 meter per seconds, and the silencer drag losses is less than the acoustically effective of 10Pa.3, the utility model is owing to will insulate against sound inside and outside cover and housing all are arranged to cylinder barrel shaped, and the housing two ends connect as one through the chimney of flange and boiler, and it is simple in structure, and is with low cost, and it is effective to eliminate the noise.The utility model can be widely used in the noise elimination noise reduction of gas fired-boiler chimney.

Description of drawings

Fig. 1 is the utility model structural representation

Fig. 2 is that sketch map is looked on the right side of Fig. 1

Fig. 3 is the cross-sectional schematic of Fig. 1

Fig. 4 is another example structure sketch map of the utility model

Fig. 5 is that sketch map is looked on the right side of Fig. 4

Fig. 6 is the cross-sectional schematic of Fig. 4

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is carried out detailed description.

Like Fig. 1, shown in Figure 4; The utility model comprises a cylindrical shell 1; Housing 1 inwall is provided with cover 3 in a sound insulation overcoat 2 and the sound insulation with one heart, between housing 1 and the sound insulation overcoat 2, and is provided with at interval through some dividing plates 4 between the cover 3 in sound insulation overcoat 2 and the sound insulation; Be connected with a center sound absorber in the cover 3 in the sound insulation, an end of the inside and

outside cover

3,2 that insulates against sound is respectively arranged with some

dewatering orifices

5,6; The two ends of cover 3 connect one respectively and are convergent taper type interface 7 in the sound insulation, and the flange 8 of a connection chimney is set respectively on each interface 7, and the outer wall of each taper type interface 7 is respectively arranged with the reinforcement gusset 9 of some adpting flanges 8 and housing 1.

Among above-mentioned each embodiment; Like Fig. 1～shown in Figure 3; The center sound absorber is a center sound absorption post 10, and sound absorption post 10 in center is taper shape 11 near an end of inside and

outside cover

3,2

dewatering orifices

5,6 of insulating against sound, the inwall of cover 3 in plurality of support 12 connections that sound absorption post 10 in center is provided with through two ends are insulated against sound.

Among above-mentioned each embodiment, center sound absorption post 10 adopts thickness less than 0.8mm, and the aperture is less than 3mm, and as mask, be filled with unit weight in the mask is 32kg/m to punching rate less than 30% orifice plate ³Or 48kg/m ³Centrifugally glass-wool.

Among above-mentioned each embodiment, it is 3mm that gripper shoe 12 adopts thickness, and width is the steel plate of 50mm.

Among above-mentioned each embodiment, like Fig. 4～shown in Figure 6, the center sound absorber is the sound insulation backplate 13 of a decussate, and the external part of each sound insulation backplate 13 connects the inwall of cover 3 in the sound insulation respectively.

Among above-mentioned each embodiment, it is the acoustical plate of 50mm that sound insulation backplate 13 adopts thickness, and acoustical plate adopts thickness less than 0.8mm, and the aperture is less than 3mm, and as mask, be filled with unit weight in the mask is 32kg/m to punching rate less than 30% perforated plate ³Or 48kg/m ³Centrifugally glass-wool.

Among above-mentioned each embodiment, less than 1mm, punching rate is made less than 3% microwell plate the inside and outside cover employing thickness that insulates against sound less than 1mm, aperture.

When the utility model uses, adopt bolt to be fixedly connected on through flange 8 on the chimney of gas fired-boiler multi-form gas fired-boiler chimney silencer and get final product.

Above-mentioned each embodiment only is used to explain the utility model; Wherein the structure of each parts, connected mode etc. all can change to some extent; Every equivalents of on the basis of the utility model technical scheme, carrying out and improvement all should not got rid of outside the protection domain of the utility model.

Claims

1. A gas-fired boiler chimney muffler is characterized in that: it comprises a cylindrical housing, and the housing inner wall is concentrically provided with a sound-insulating overcoat and a sound-insulating inner sleeve, between the housing and the sound-insulating overcoat , and between the sound-insulating outer cover and the sound-insulating inner cover are arranged at intervals through several partitions, a central sound-absorbing device is connected to the sound-insulating inner cover, and a number of Water discharge holes; the two ends of the sound insulation inner sleeve are respectively connected to a tapered truncated cone-shaped interface, each of which is respectively provided with a flange connected to the chimney, and the outer wall of each of the described truncated cone-shaped interfaces is respectively provided with several A stiffener plate connecting the flange and the housing.

2. A gas-fired boiler chimney muffler as claimed in claim 1, characterized in that: the central sound-absorbing device is a central sound-absorbing column, and the central sound-absorbing column is close to the sound-insulating inner and outer outer water discharge holes One end is conical, and the central sound-absorbing column is connected to the sound-insulating inner sleeve through a number of support plates arranged at both ends.

3. A gas-fired boiler chimney muffler as claimed in claim 2, characterized in that: the central sound-absorbing column adopts an orifice plate with a thickness of less than 0.8mm, an aperture of less than 3mm, and a perforation rate of less than 30% as a protective surface, and the The protective surface is filled with centrifugal glass wool with a bulk density of 32kg/ ^m3 .

4. A gas-fired boiler chimney muffler as claimed in claim 2, characterized in that: the central sound-absorbing column adopts an orifice plate with a thickness of less than 0.8mm, an aperture of less than 3mm, and a perforation rate of less than 30% as a protective surface, and the The protective surface is filled with centrifugal glass wool with a bulk density of 48kg/ ^m3 .

5. A gas-fired boiler chimney muffler as claimed in claim 2, 3 or 4, characterized in that: the support plate is a steel plate with a thickness of 3 mm and a width of 50 mm.

6. A gas-fired boiler chimney muffler as claimed in claim 1, characterized in that: said central sound-absorbing device is a cross-shaped sound-insulating guard, and the protruding end of each said sound-insulating guard The inner walls of the sound insulation inner sleeves are respectively connected.

7. A gas-fired boiler chimney muffler as claimed in claim 6, characterized in that: the sound insulation guard plate adopts a sound-absorbing sheet with a thickness of 50mm, the thickness of the sound-absorbing sheet is less than 0.8mm, and the aperture is less than 3mm. A perforated plate with a perforation rate of less than 30% is used as a protective surface, and the protective surface is filled with centrifugal glass wool with a bulk density of 32kg/m ³ .

8. A gas-fired boiler chimney muffler as claimed in claim 6, characterized in that: the sound insulation guard plate adopts a sound-absorbing sheet with a thickness of 50mm, and the sound-absorbing sheet adopts a thickness less than 0.8mm and an aperture of less than 3mm. A perforated plate with a perforation rate of less than 30% is used as a protective surface, and the protective surface is filled with centrifugal glass wool with a bulk density of 48kg/m ³ .

9. A gas-fired boiler chimney muffler as claimed in claim 1 or 2 or 3 or 4 or 6 or 7 or 8, characterized in that: the sound insulation inner and outer jackets have a thickness of less than 1 mm, a hole diameter of less than 1 mm, and a perforation rate of Less than 3% of microplates are fabricated.

10. A gas boiler chimney muffler as claimed in claim 5, characterized in that: the sound insulation inner and outer jackets are made of microporous plates with a thickness less than 1mm, a hole diameter less than 1mm, and a perforation rate less than 3%.