CN116104214A - Rainproof silencer - Google Patents
Rainproof silencer Download PDFInfo
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- CN116104214A CN116104214A CN202211279698.6A CN202211279698A CN116104214A CN 116104214 A CN116104214 A CN 116104214A CN 202211279698 A CN202211279698 A CN 202211279698A CN 116104214 A CN116104214 A CN 116104214A
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- 230000030279 gene silencing Effects 0.000 claims abstract description 192
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- 235000007164 Oryza sativa Nutrition 0.000 claims description 7
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/8209—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only sound absorbing devices
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/16—Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof insulating material or its integration in the roof structure
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F17/00—Vertical ducts; Channels, e.g. for drainage
- E04F17/04—Air-ducts or air channels
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses a rainproof silencer, which relates to the field of noise control and comprises a silencing funnel and a silencing support, wherein a liquid leakage hole is formed in the lower end of the silencing funnel, a drainage conduit channel is formed in the silencing support, and a drainage conduit is arranged in the drainage conduit channel. The invention integrates the drainage channel into the silencing bracket, and compared with the structure of exposing the drainage channel in the sound field of the air duct, the invention has less noise radiated to the outside of the silencer by the drainage channel, and can achieve the effects of silencing and rainproof simultaneously. The formula of the relation between the rainproof quantity and the maximum section diameter of the silencing funnel, the diameter of the drainage conduit and the bending angle is listed in the application, so that rainwater received in the silencing funnel can be timely discharged, and water inflow in silencing equipment is prevented.
Description
Technical Field
The invention relates to the field of noise control, in particular to a rainproof silencer.
Background
When the noise of the factory building is treated, a silencer is required to be installed on an air duct exhaust outlet (such as a chimney, an air outlet channel of a fan and the like) at the top of the factory building so as to reduce the noise. In order to prevent rainwater from entering the air duct, the top muffler needs to have a rainproof function. At present, most of the existing muffler adopts a muffler elbow muffler or a rainproof cap is additionally arranged at the top of the muffler to achieve the rainproof effect.
After the silencing elbow is additionally arranged, the noise which is originally radiated upwards is reflected to the direction of an elbow outlet by the elbow. At this time, noise in the vicinity of the outlet direction of the elbow is significantly increased, and affects the person in the area. And the silencing elbow can generate wind resistance, so that the air quantity flowing through the air duct is attenuated.
After the rain hat is additionally arranged at the top of the silencer, the noise which is radiated upwards originally is reflected by the rain hat to the ground direction, so that the noise of the factory personnel activity area is increased. The waterproof cap is additionally arranged at the top of the silencer, so that the construction quantity and the construction difficulty (high risk coefficient due to high-altitude operation) of noise reduction engineering are increased.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide a rainproof silencer with a rainproof function.
In order to achieve the above purpose, the invention adopts the following technical scheme: the rainproof silencer comprises a silencing funnel and a silencing support, wherein the silencing funnel is used for collecting rainwater, a drain hole is formed in the lower end of the silencing funnel, a drainage conduit channel is formed in the silencing support, a drainage conduit is arranged in the drainage conduit channel, the drainage conduit is in butt joint with the drain hole, and water in the silencing funnel is discharged out of the rainproof silencer through the drain hole and the drainage conduit; the rainwater in entering this muffler is collected in the amortization funnel, and the rainwater enters into the drainage pipe through weeping hole, then outside this muffler of discharge, prevent that the rainwater from entering into in the mechanism that needs amortization, reach rainproof effect. The traditional drainage conduit is exposed in the sound field of the air flow channel in the silencer, and the sound energy in the sound field and the noise generated when the air flow impacts the drainage conduit can be transmitted and radiated to the outside of the silencer through the drainage conduit, so that the noise reduction effect of the silencer is reduced; the drainage conduit in this application is hidden in the amortization support, has avoided the noise to propagate outside the muffler through the drainage conduit. The drain pipe may be made of metal or nonmetal, and may be elastic or rigid.
The noise reduction funnel and the noise reduction bracket are made of sound absorbing materials and are used for reducing noise of airflow, and the noise reduction funnel is arranged to be conical and is used for collecting rainwater entering the silencer.
Further is: the silencing funnel comprises a first sealing shell and a first mesh plate, wherein the first sealing shell is arranged on the upper surface, so that rainwater moves downwards along the first sealing shell and is collected in the silencing funnel; the first mesh plate is arranged on the lower surface, and the space between the first sealing shell and the first mesh plate is filled with sound-absorbing materials wrapped by waterproof cloth. Be provided with a plurality of mesh on the first mesh board, the noise passes mesh and sound absorbing material contact, noise reduction, sound absorbing material is wrapped up by waterproof cloth and is used for preventing that sound absorbing material from meeting water and influencing noise reduction effect, reaches rainproof effect.
Further is: the silencing support comprises a third mesh plate arranged on the outer surface, and the inner side of the third mesh plate is filled with sound-absorbing materials wrapped by waterproof cloth. Noise passes through the third mesh plate and then contacts with the sound absorbing material, so that noise is reduced.
Further is: the upper side of the silencing funnel is provided with an exhaust silencing mechanism, the exhaust silencing mechanism is a mechanism for discharging air flow, noise is contacted with a sound absorbing material in the exhaust silencing mechanism when passing through the exhaust silencing mechanism, and the energy of the noise is absorbed again.
Further is: the exhaust silencing mechanism comprises a silencing barrel and a silencing barrel seat, the silencing barrel and the silencing barrel seat are made of sound-absorbing materials, the silencing barrel seat is connected with the silencing barrel and a silencer shell, and air flow enters the silencing barrel from the silencer shell through the silencing barrel seat so as to be discharged out of the silencer; rainwater falls into the silencing funnel through the silencing barrel.
Further is: the silencing barrel and the silencing barrel seat comprise a second sealing shell arranged on the outer surface and a second mesh plate arranged on the inner surface, and sound absorbing materials wrapped with waterproof cloth are filled between the second sealing shell and the second mesh plate. One end of the silencing barrel, which is far away from the silencing barrel seat, is provided with a silencer air outlet. The air flow is converged to the silencing barrel through the silencing barrel seat and is discharged through the air outlet of the silencer.
Further is: the outside of amortization funnel is provided with the muffler shell, the upper end and the exhaust silencing mechanism of muffler shell are connected, there is the clearance that supplies the gas to flow between amortization funnel and the muffler shell, and the air current passes through from the clearance department between amortization funnel and the muffler shell, enters into the amortization section of thick bamboo in, then discharges. The silencer shell can be made of metal or nonmetal, and in the embodiment, the silencer shell is made of stainless steel; the sound absorbing material can be arranged on the inner side wall of the silencer shell to further reduce noise, and the silencer shell is only made of stainless steel shell without the sound absorbing material due to cost.
Further is: the muffler is characterized in that one end of the muffler shell, which is far away from the exhaust silencing mechanism, is connected with an air inlet base, a drainage conduit through hole is formed in the air inlet base, and the drainage conduit penetrates through the drainage conduit through hole to drain water out of the muffler. After the drain conduit passes through the air inlet base from the drain conduit via hole, sealing treatment is required between the drain conduit via hole and the drain conduit. The sealing treatment mode can be sealing glue or sealing rings, and in the embodiment, the drain guide pipe and the drain guide pipe through hole are sealed through the sealing glue. The air inlet base is connected with an air outlet of an air channel of the factory building. When the air inlet base is connected with the air outlet of the air duct of the factory building, the air inlet base is required to ensure that the connection between the air inlet base and the air outlet of the air duct of the factory building is sealed.
Further is: the silencer shell is close to exhaust silencing mechanism's one end is provided with the gas vent, the one end that the silencer shell is close to the base of admitting air is provided with the air inlet, the area of gas vent is greater than the area of air inlet. The air flow is influenced by the silencing support and the silencing funnel after entering from the air inlet, and the air flow speed can be increased. After the air flow reaches the air outlet, the area of the air outlet is enlarged, the air displacement is increased, turbulence is reduced, and therefore noise generated by the air flow is reduced.
Further is: the diameter D of the upper end of the silencing funnel and the angle A of the maximum inclination of rainwater falling on the silencing funnel directly have the following relation:
the rice, wherein a is the maximum linear distance that rainwater can directly fall to the upper end of the silencing funnel from the upper end of the silencing barrel; c is the shortest linear distance, namely the vertical distance, of rainwater falling from the upper end of the silencing barrel to the upper end of the silencing funnel directly;
and the relation between the diameter D of the upper end of the silencing funnel and the diameter L of the lower end of the silencing cylinder seat meets the following conditions:
d is more than or equal to L+0.4m, wherein L is the diameter of the lower end of the silencing cylinder seat.
In order to ensure that rainwater does not enter the air duct of the factory building, the invention needs to meet the following design requirements:
in order to achieve the rainproof effect, rainwater enters the silencer through the air outlet of the silencer and is received by the silencing funnel, and then flows through the drainage guide pipe through the liquid leakage hole of the silencing funnel to be discharged out of the silencer.
The exhaust silencing mechanism and the silencing funnel are coaxial. In order to achieve the rainproof effect, as shown in fig. 15 and 16, the length of b should be theoretically smaller than the maximum section diameter D of the silencing funnel.
According to the cosine theorem
，
In practical applications, we also consider the splashing when rainwater drops and the errors in manufacturing the silencer. Therefore, when the rain-proof silencer related to the invention is actually manufactured, the margin of 0.4 meter is reserved, and D is more than or equal to b+0.4meter.
I.e. the rain-proof muffler is designed to meet
The rice is used for the production of rice,
at the same time should satisfy
The purpose of this is to ensure that rainwater that slides down the inner wall of the exhaust silencing mechanism drips into the silencing funnel.
Further is: the relation between the maximum rainproof quantity h of the rainproof silencer and the maximum section diameter of the silencing funnel, the diameter of the drainage conduit and the bending angle is as follows:
wherein h is the maximum amount of rain protection, h millimeters per minute; d is the maximum section diameter of the silencing funnel, in units of: millimeter, B is the bending angle of the drainage conduit.
In order to ensure that the rainwater contained in the silencing funnel is discharged in time, the liquid leakage hole and the drainage guide pipe of the silencing funnel are required to meet the following design requirements:
the maximum drainage flow of the vertical pipe determined by referring to the maximum design drainage flow of a rainwater vertical pipe of a gravity flow system in a table 7.2.5 in the technical specification CJJ 142-2014 of a rainwater drainage system of a building roof of the industry standard of the people's republic of China is represented by M, and the maximum drainage flow n of a drainage pipe in the invention can be expressed as
The maximum rain-proof capacity designed by the invention is h millimeters per minute, the maximum section diameter of the silencing funnel is D millimeters, and in order to ensure that water in the silencing funnel is timely discharged and does not overflow, the formula is satisfied when the rain-proof silencer related by the invention is designed
I.e.
。
The sound-absorbing muffler has the beneficial effects that the sound-absorbing material is used for building the rainproof structure inside the muffler, the whole product has a simple structure, and secondary noise generated when air flows through the muffler is reduced. The invention integrates the drainage channel into the silencing bracket, and compared with the structure of exposing the drainage channel in the acoustic environment of the air duct, the invention has less noise radiated to the outside of the silencer by the drainage channel, and can achieve the effects of silencing and rainproof simultaneously. The formula of the relation between the rainproof quantity and the maximum section diameter of the silencing funnel, the diameter of the drainage conduit and the bending angle is listed in the application, so that rainwater received in the silencing funnel can be timely discharged, and water inflow in silencing equipment is prevented.
Drawings
FIG. 1 is a schematic diagram showing the cooperation of a silencing funnel and a silencing support according to a preferred embodiment of the present invention;
FIG. 2 is a top view of a silencing funnel;
FIG. 3 is a schematic structural view of a silencing funnel;
FIG. 4 is a front view of a silencing funnel;
FIG. 5 is a cross-sectional view of B-B;
FIG. 6 is a schematic structural view of a sound deadening bracket;
fig. 7 is a front view of the sound deadening bracket;
FIG. 8 is a cross-sectional view of A-A;
FIG. 9 is a schematic overall structure of a preferred embodiment of the present invention;
FIG. 10 is a schematic view of an exhaust muffler mechanism according to a preferred embodiment of the present invention;
FIG. 11 is a schematic structural view of a muffler shell;
FIG. 12 is a front view of the present invention;
FIG. 13 is a cross-sectional view of C-C;
FIG. 14 is a schematic view of the structure of the intake base;
FIG. 15 is a dimensional map of the maximum linear distance a traveled by rainwater from the upper end of the silencing barrel directly to the upper end of the silencing funnel, the maximum distance b between the outermost side of the silencing barrel seat and the inner wall of the silencing barrel, and the maximum inclination angle A of rainwater directly falling onto the silencing funnel;
FIG. 16 is a dimensional map of the diameter L of the lower end of the silencing pot holder and the maximum cross-sectional diameter D of the silencing funnel of the present invention;
FIG. 17 is a schematic view of the drain conduit bend angle;
FIG. 18 is a maximum design bleed flow meter for a gravity flow system rain water riser;
in the figure: 1. a silencing funnel; 2. a sound attenuation bracket; 3. a weeping hole; 4. a drain conduit channel; 5. a drainage conduit; 6. a first seal housing; 7. a first mesh plate; 8. a sound absorbing material; 9. an exhaust silencing mechanism; 10. a sound deadening cylinder; 11. a silencing cylinder seat; 12. a muffler shell; 13. an air inlet base; 14. a drain conduit via; 15. an exhaust port; 16. an air inlet; 17. and an air outlet of the silencer.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present invention; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, 2, 12 and 13, an embodiment of the present application provides a rainproof muffler, which includes a silencing funnel 1 and a silencing support 2, where the silencing funnel 1 is used for collecting rainwater, a drain hole 3 is provided at the lower end of the silencing funnel 1, a drain pipe channel 4 is provided in the silencing support 2, a drain pipe 5 is provided in the drain pipe channel 4, the drain pipe 5 is in butt joint with the drain hole 3, and water in the silencing funnel 1 is drained out of the rainproof muffler through the drain hole 3 and the drain pipe 5; rainwater entering into this muffler is collected in the amortization funnel 1, and rainwater enters into drainage pipe 5 through weeping hole 3, then outside this muffler of discharge, prevent that the rainwater from entering into the mechanism that needs amortization, reach rainproof effect. The traditional drainage conduit 5 is exposed in the sound field of the air flow channel in the silencer, and the sound energy in the sound field and the noise generated when the air flow impacts the drainage conduit 5 can be transmitted and radiated to the outside of the silencer through the drainage conduit, so that the noise reduction effect of the silencer is reduced; the existing drainage conduit 5 is hidden in the silencing bracket 2, so that noise is prevented from being transmitted to the outside of the silencer through the drainage conduit. The drain pipe 5 may be made of metal or nonmetal, and may be elastic or rigid.
The silencing funnel 1 and the silencing support 2 are made of sound absorbing materials and used for reducing noise of air flow, and the silencing funnel 1 is arranged to be conical and used for collecting rainwater entering the silencer.
The number of the drainage pipes 5 in the present application may be one or more, and the number of the weeping holes 3 in the silencing funnel 1 may be one or more.
The drain pipe 5 may be made of metal or nonmetal, and may be elastic or rigid.
On the basis of the above, as shown in fig. 3, 4 and 5, the silencing funnel 1 comprises a first sealing shell 6 and a first mesh plate 7, wherein the first sealing shell 6 is arranged on the upper surface, so that rainwater moves downwards along the first sealing shell 6 and is collected in the silencing funnel 1; the first mesh plate 7 is arranged on the lower surface, and the space between the first sealing shell 6 and the first mesh plate 7 is filled with a sound absorbing material 8 wrapped by waterproof cloth. Be provided with a plurality of mesh on the first mesh board 7, the noise passes mesh and sound absorbing material contact, noise reduction, sound absorbing material is wrapped up by waterproof cloth and is used for preventing that sound absorbing material from meeting the influence noise reduction effect after water, reaches rainproof effect.
The sound absorbing material 8 may be a fibrous sound absorbing material 8 such as fiberglass, rock wool, felt, etc., or may be a foam sound absorbing material 8 such as polyurethane foam, EPDM foam, PE foam, etc. any material having a sound absorbing effect. The sound absorbing material 8 is selected by taking into consideration the influence of the actual use environment on the physical and chemical properties of the material, such as high and low temperature resistance, chemical resistance, etc.
The materials of the first mesh plate, the second mesh plate and the third mesh plate are stainless steel, and other metal or nonmetal materials can be used according to actual needs.
On the basis of the above, the sound-deadening bracket 2 as shown in fig. 6, 7 and 8 includes a third mesh plate provided on the outer surface, the inside of which is filled with a sound-absorbing material wrapped with waterproof cloth. Noise passes through the third mesh plate and then contacts with the sound absorbing material, so that noise is reduced. The noise elimination support in this application includes three facade, and three facade interconnect, and the angle between the adjacent facade is 120 degrees, the shape of noise elimination support 2 also can be mouth font, groined type, circular, oval.
According to the requirement of structural strength, the inside of the silencing support can be provided with a structural reinforcing plate so as to increase the structural strength of the silencing support. The sound absorbing material covered by waterproof cloth is filled in the peripheral area of the structural reinforcing plate in the sound absorbing support.
In addition, as shown in fig. 9, an exhaust silencing mechanism 9 is provided above the silencing funnel 1, the exhaust silencing mechanism 9 is a mechanism for discharging the air flow, and when noise passes through the exhaust silencing mechanism 9, the noise contacts with a sound absorbing material inside the exhaust silencing mechanism, and the energy of the noise is absorbed again.
On the basis of the above, as shown in fig. 10, the exhaust silencing mechanism 9 comprises a silencing barrel 10 and a silencing barrel seat 11, wherein the silencing barrel 10 and the silencing barrel seat 11 are made of sound absorbing materials, the silencing barrel seat 11 is connected with the silencing barrel 10 and a silencer shell 12, and air flow enters the silencing barrel 10 from the silencer shell 12 through the silencing barrel seat 11 so as to be discharged out of the silencer; rainwater falls into the silencing funnel 1 through the silencing barrel 10.
On the basis of the above, the silencing pot 10 and the silencing pot seat 11 each comprise a second sealing shell arranged on the outer surface and a second mesh plate arranged on the inner surface, and sound absorbing materials wrapped with waterproof cloth are filled between the second sealing shell and the second mesh plate. The end of the silencing cylinder 10 far away from the silencing cylinder seat 11 is provided with a silencer air outlet 17. The air flow is converged to the silencing barrel 10 through the silencing barrel seat 11 and discharged through the air outlet 17 of the silencer.
On the basis of the above, the outside of the silencing funnel 1 is provided with a silencer shell 12, the upper end of the silencer shell 12 is connected with an exhaust silencing mechanism 9, a gap for air to flow is arranged between the silencing funnel 1 and the silencer shell 12, and air flow passes through the gap between the silencing funnel 1 and the silencer shell 12, enters the silencing barrel 10 and is discharged. The muffler shell 12 may be made of metal or nonmetal, and in this embodiment, the muffler shell is made of stainless steel, or other metal or nonmetal materials may be used according to actual needs. The inner side wall of the silencer casing 12 may be provided with a sound absorbing material for further silencing, and the silencer casing 12 is made of stainless steel only and no sound absorbing material is attached to the silencer casing 12 in the present embodiment, because of cost.
On the basis of the above, as shown in fig. 14, an air intake base 13 is connected to one end of the muffler shell 12 far from the exhaust silencing mechanism 9, a drain conduit through hole 14 is provided on the air intake base 13, and the drain conduit 5 passes through the drain conduit through hole 14 to drain water out of the muffler. The number of the drain guide passage holes 14 in the air intake base 13 may be one or a plurality. After the drain conduit 5 passes through the air inlet base 13 from the drain conduit via hole 14, the seal treatment is performed between the drain conduit via hole 14 and the drain conduit 5. The sealing treatment mode can be that sealing glue or sealing rings are used, and in the embodiment, the drain conduit 5 and the drain conduit via hole 14 are sealed by the sealing glue. The air inlet base 13 is connected with an air outlet of an air duct of the factory building. The air inlet base 13 is connected with the air outlet of the air duct of the factory building, so that the connection between the air inlet base and the air outlet is sealed.
On the basis of the above, as shown in fig. 11, an exhaust port 15 is provided at an end of the muffler housing 12 close to the exhaust silencing mechanism 9, an intake port 16 is provided at an end of the muffler housing 12 close to the intake base 13, and the area of the exhaust port 15 is larger than that of the intake port 16. The air flow is influenced by the silencing bracket 2 and the silencing funnel 1 after entering from the air inlet 16, and the air flow speed is increased. After the air flow reaches the exhaust port 15, the area of the exhaust port 15 becomes large, the amount of exhaust is increased, and turbulence is reduced, so that noise generated by the air flow is reduced.
On the basis of the above, as shown in fig. 15 and 16, the following relationship exists between the diameter D of the upper end of the silencing funnel and the angle a of maximum inclination at which rainwater falls directly on the silencing funnel:
the rice, wherein a is the maximum linear distance that rainwater can directly fall to the upper end of the silencing funnel from the upper end of the silencing barrel; c is the shortest linear distance, namely the vertical distance, of rainwater falling from the upper end of the silencing barrel to the upper end of the silencing funnel directly;
and the relation between the diameter D of the upper end of the silencing funnel and the diameter L of the lower end of the silencing cylinder seat meets the following conditions:
d is more than or equal to L+0.4m, wherein L is the diameter of the lower end of the silencing cylinder seat.
In order to ensure that rainwater does not enter the air duct of the factory building, the invention needs to meet the following design requirements:
in order to achieve the rainproof effect, rainwater enters the silencer through the silencer air outlet 17 and is received by the silencing funnel, and then flows through the drainage conduit through the weeping hole of the silencing funnel to be discharged out of the silencer.
The exhaust silencing mechanism and the silencing funnel are coaxial. In order to achieve the rainproof effect, the length of the sound-deadening funnel b should be theoretically smaller than the maximum section diameter D of the sound-deadening funnel as shown in fig. 15 and 16.
According to the cosine theorem
，
In practical applications, we also consider the splashing when rainwater drops and the errors in manufacturing the silencer. Therefore, when the rain-proof silencer related to the invention is actually manufactured, the margin of 0.4 meter is reserved, and D is more than or equal to b+0.4meter.
I.e. the rain-proof muffler is designed to meet
The rice is used for the production of rice,
at the same time should satisfy
The purpose of this is to ensure that rainwater that slides down the inner wall of the exhaust silencing mechanism drips into the silencing funnel.
On the basis, the relation between the maximum rainproof quantity h of the rainproof silencer and the maximum section diameter of the silencing funnel, the diameter of the drainage conduit and the bending angle is as follows:
，
wherein h is the maximum amount of rain protection, h millimeters per minute; d is the maximum section diameter of the silencing funnel, in units of: millimeter; b is the bending angle of the drainage conduit (as shown in fig. 17).
In order to ensure that the rainwater contained in the silencing funnel is discharged in time, the liquid leakage hole and the drainage guide pipe of the silencing funnel are required to meet the following design requirements:
the maximum drainage flow of the vertical pipe determined by referring to the maximum design drainage flow of a rainwater vertical pipe of a gravity flow system in a table 7.2.5 in the technical specification CJJ 142-2014 of a rainwater drainage system of a building roof of the industry standard of the people's republic of China is represented by M, and the maximum drainage flow n of a drainage pipe in the invention can be expressed as
The maximum rain-proof capacity designed by the invention is h millimeters per minute, the maximum section diameter of the silencing funnel is D millimeters, and in order to ensure that water in the silencing funnel is timely discharged and does not overflow, the formula is satisfied when the rain-proof silencer related by the invention is designed
I.e.
Referring to fig. 18, according to the maximum amount of rain h required when the muffler is actually used, an M value is calculated through the above formula, and then a corresponding drainage pipe specification is queried through the M value. For example, when the M value is 15.8 liters per second, the table of fig. 18 is a steel drainage pipe with the following specifications: nominal outer diameter 133mm, wall thickness 4.0mm.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (11)
1. A rain-proof muffler, characterized in that: the novel rainproof silencer comprises a silencing funnel (1) and a silencing support (2), wherein a liquid leakage hole (3) is formed in the lower end of the silencing funnel (1), a drainage guide pipe channel (4) is formed in the silencing support (2), a drainage guide pipe (5) is arranged in the drainage guide pipe channel (4), the drainage guide pipe (5) is in butt joint with the liquid leakage hole (3), and water in the silencing funnel (1) is discharged out of the rainproof silencer through the liquid leakage hole (3) and the drainage guide pipe (5);
the silencing funnel (1) and the silencing support (2) are made of sound absorbing materials, and the silencing funnel (1) is arranged to be conical.
2. A rain-proof silencer as claimed in claim 1, wherein: the silencing funnel (1) comprises a first sealing shell (6) and a first mesh plate (7), wherein the first sealing shell (6) is arranged on the upper surface, the first mesh plate (7) is arranged on the lower surface, and sound absorbing materials (8) wrapped by waterproof cloth are filled between the first sealing shell (6) and the first mesh plate (7).
3. A rain-proof silencer as claimed in claim 1, wherein: the silencing bracket (2) comprises a third mesh plate arranged on the outer surface, and the inner side of the third mesh plate is filled with a sound absorbing material wrapped by waterproof cloth.
4. A rain-proof silencer as claimed in claim 1, wherein: an exhaust silencing mechanism (9) is arranged above the silencing funnel (1).
5. A rain-proof silencer as claimed in claim 4, wherein: the exhaust silencing mechanism (9) comprises a silencing barrel (10) and a silencing barrel seat (11), and the silencing barrel (10) and the silencing barrel seat (11) are made of sound-absorbing materials.
6. A rain-proof silencer as claimed in claim 5, wherein: the silencing cylinder (10) and the silencing cylinder seat (11) comprise a second sealing shell arranged on the outer surface and a second mesh plate arranged on the inner surface, and sound absorbing materials wrapped with waterproof cloth are filled between the second sealing shell and the second mesh plate.
7. A rain-proof silencer as claimed in claim 4, wherein: the outer side of the silencing funnel (1) is provided with a silencer shell (12), the upper end of the silencer shell (12) is connected with an exhaust silencing mechanism (9), and a gap for air to flow is reserved between the silencing funnel (1) and the silencer shell (12).
8. A rain-proof silencer as claimed in claim 7, wherein: one end of the silencer shell (12) far away from the exhaust silencing mechanism (9) is connected with an air inlet base (13), a drainage conduit through hole (14) is formed in the air inlet base (13), and the drainage conduit (5) penetrates through the drainage conduit through hole (14) to drain water out of the silencer.
9. A rain-proof silencer as claimed in claim 7, wherein: an exhaust port (15) is formed in one end, close to the exhaust silencing mechanism (9), of the silencer shell (12), an air inlet (16) is formed in one end, close to the air inlet base (13), of the silencer shell (12), and the area of the exhaust port (15) is larger than that of the air inlet (16).
10. A rain-proof silencer as claimed in claim 7, wherein: the diameter D of the upper end of the silencing funnel and the angle A of the maximum inclination of rainwater falling on the silencing funnel directly have the following relation:
and the relation between the diameter D of the upper end of the silencing funnel and the diameter L of the lower end of the silencing cylinder seat meets the following conditions:
d is more than or equal to L+0.4m, wherein L is the diameter of the lower end of the silencing cylinder seat.
11. A rain-proof silencer as claimed in claim 7, wherein: the maximum rainproof quantity h of the rainproof silencer, the maximum section diameter of the silencing funnel, the diameter of the drainage conduit and the bending angleThe relation between the two is:
wherein h is the maximum amount of rain protection, h millimeters per minute; d is the maximum section diameter of the silencing funnel, in units of: millimeter, B is the bending angle of the drainage conduit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211279698.6A CN116104214B (en) | 2022-10-19 | 2022-10-19 | Rainproof silencer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211279698.6A CN116104214B (en) | 2022-10-19 | 2022-10-19 | Rainproof silencer |
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| CN116104214A true CN116104214A (en) | 2023-05-12 |
| CN116104214B CN116104214B (en) | 2023-06-27 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM485372U (en) * | 2014-04-09 | 2014-09-01 | Hwa Yi Ventilation Co Ltd | Low wind resistance chimney rainproof type muffler |
| CN108019916A (en) * | 2017-12-30 | 2018-05-11 | 江苏永益环保科技有限公司 | Noise reduction rain-proof exhaust apparatus |
| CN207849413U (en) * | 2017-12-30 | 2018-09-11 | 江苏永益环保科技有限公司 | Noise reduction rain-proof drains blast cap |
| CN209164197U (en) * | 2017-08-17 | 2019-07-26 | 商丘市金桥环保科技有限公司 | Rain proof type silencer |
| CN114396389A (en) * | 2021-12-31 | 2022-04-26 | 英飞同仁风机股份有限公司 | Upward blowing type silencing roof fan |
-
2022
- 2022-10-19 CN CN202211279698.6A patent/CN116104214B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM485372U (en) * | 2014-04-09 | 2014-09-01 | Hwa Yi Ventilation Co Ltd | Low wind resistance chimney rainproof type muffler |
| CN209164197U (en) * | 2017-08-17 | 2019-07-26 | 商丘市金桥环保科技有限公司 | Rain proof type silencer |
| CN108019916A (en) * | 2017-12-30 | 2018-05-11 | 江苏永益环保科技有限公司 | Noise reduction rain-proof exhaust apparatus |
| CN207849413U (en) * | 2017-12-30 | 2018-09-11 | 江苏永益环保科技有限公司 | Noise reduction rain-proof drains blast cap |
| CN114396389A (en) * | 2021-12-31 | 2022-04-26 | 英飞同仁风机股份有限公司 | Upward blowing type silencing roof fan |
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| CN116104214B (en) | 2023-06-27 |
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