CN111780398B - Spiral-case-like silencing ventilation device and application method thereof - Google Patents

Abstract

The invention discloses a volute-like silencer ventilation device and a method of using the same, and belongs to the field of silencers. The volute-like silencer ventilation device comprises a main ventilation pipe, a plurality of evenly distributed air inlets are fixedly connected to the main ventilation pipe, and a vortex silencer is installed on the air inlet. The vortex silencer comprises an air inlet pipe, a volute silencer is fixedly connected to the lower end of the air inlet pipe, a mesh silencer is connected between the volute silencer and the air inlet pipe, a plurality of evenly distributed air holes are developed on the mesh silencer, a plurality of staggered buffer blades are connected to the inside of the volute silencer, a pair of exhaust pipes are fixedly connected to the outer wall of the volute silencer, and the vortex silencer can be used to extend the airflow stroke of the volute silencer through the volute silencer, and the kinetic energy of the airflow is absorbed and the airflow is reflected through the action of the plurality of buffer blades in the volute silencer, so as to effectively decelerate the airflow and reduce the noise generated when the airflow collides with the inner wall of the volute silencer.

Description

A volute-like noise-reducing ventilation device and a method of using the same

Technical Field

The present invention relates to the field of mufflers, and more particularly to a volute-like muffler ventilation device and a use method thereof.

Background Art

At present, large central air conditioners usually have their final air outlet ducts installed on the top of the house. To prevent excessive rain and dust from entering, ventilation shutters are usually installed at the outlet of the air outlet duct. Traditional ventilation shutters have a single structure and have little effect on the noise inside the house, but they will cause greater noise pollution to nearby houses that are higher than the location of the ventilation shutters, making the surrounding residents miserable.

At present, in the field of ventilation and noise reduction, installing silencers is the most common and effective treatment measure. A silencer refers to a noise reduction device that can be used for airflow ducts with noise transmission, such as pipes and elbows with sound-absorbing linings or pipes with sudden changes in cross-sectional area and other discontinuous acoustic impedance, so that the noise in the pipe can be attenuated or reflected back. The former is called a resistive silencer, and the latter is called a reactive silencer. There are also impedance composite silencers. Generally speaking, a silencer is a device that allows airflow to pass smoothly and effectively attenuates sound energy. Ventilation silencers can be roughly divided into resistive silencers, reactive silencers, impedance composite silencers, and ventilation pressure relief silencers according to their different silencer principles and structures. Resistive silencers are the most commonly used type of silencers in ventilation and silencer systems. Resistive silencers use the mechanism that when sound waves propagate in sound-absorbing materials or structures, the sound energy is converted into heat energy due to friction and dissipated to achieve the purpose of silence.

The installation of resistive silencers is very common in actual engineering applications. Common ones include sheet-type silencers, matrix-type silencers, folded-plate silencers and various derivative products. Their silencer principles are to achieve the purpose of silencer by utilizing the sound absorption properties of fiber-like porous sound-absorbing materials.

The current silencers have a single silencer principle, poor silencer effect, and are large in size. Most of them are installed at pipe joints, occupying a large space.

Summary of the invention

1. Technical problems to be solved

In view of the problems existing in the prior art, the purpose of the present invention is to provide a volute-like silencer ventilation device, which can realize the silencer device being installed in the main ventilation duct and located at the connection between the branch ventilation duct and the main air duct, occupying a small space and having a high space utilization rate. When the airflow enters the vortex silencer through the air inlet, the airflow is first broken up by the mesh silencer to slow down the airflow, and then enters the volute silencer, and the airflow stroke is extended through the volute silencer. During the flow of the airflow in the volute silencer, the kinetic energy of the airflow is absorbed and the airflow is reflected by the action of multiple buffer blades. At the same time, the noise generated when the decelerated airflow collides with the inner wall of the volute silencer is generated by the buffering effect of the buffer blades. Finally, the decelerated airflow enters the main ventilation duct through the exhaust pipe connected to the vortex silencer, and the airflow discharged from the exhaust pipe is further broken up through the multiple through holes on the exhaust pipe, effectively reducing the noise generated by the collision of the high-speed airflow with the airflow in the main ventilation duct.

2. Technical solution

To solve the above problems, the present invention adopts the following technical solutions.

A volute-like silencer ventilation device, including a volute-like silencer ventilation device, the volute-like silencer ventilation device including a main ventilation pipe, the main ventilation pipe is fixedly connected to a plurality of evenly distributed air inlets, the air inlet is installed with a branch main ventilation pipe, the air inlet is connected to the branch main ventilation pipe by a flange, a vortex muffler is installed in the air inlet, the vortex muffler includes an air inlet pipe, a volute silencer is fixedly connected to the lower end of the air inlet pipe, a mesh silencer is connected between the volute silencer and the air inlet pipe, a plurality of evenly distributed air holes are developed on the mesh silencer, and the volute silencer There are multiple buffer blades distributed in an alternating manner connected inside, a pair of exhaust pipes are fixedly connected to the outer wall of the volute muffler, a plurality of vents are drilled on the exhaust pipes, the exhaust pipes are communicated with the inner cavity of the volute muffler, a plurality of through holes are drilled on the exhaust pipes, a diverter plate is provided between two adjacent vortex mufflers, the inner wall of the diverter plate is fixedly connected to one end of the exhaust pipe away from the volute muffler, so that the vortex muffler can extend the airflow stroke through the volute muffler, and the multiple buffer blades in the volute muffler can absorb the kinetic energy of the airflow, reflect the airflow, effectively slow down the airflow and reduce the noise generated when the volute muffler collides with the inner wall.

Furthermore, the buffer blades are in the shape of diamond scales, are made by stamping elastic steel, and are distributed in the shape of fish scales on the inner wall of the volute silencer. The lower ends of the buffer blades are fixedly connected with sound-absorbing sponges and buffer blades.

Furthermore, a sound insulation layer is laid on the outer wall of the main ventilation duct, and the noise generated by the main ventilation duct can be reduced by the sound insulation layer.

Furthermore, the diverter plate is a V-shaped stainless steel plate, and the angle of the diverter plate is 60°. One end of the exhaust pipe is fixedly connected to the inner wall of the exhaust pipe, and the airflow is diverted by the diverter plate. The airflow of the exhaust pipe and the airflow of the main ventilation pipe are separated by the diverter plate to prevent the airflow discharged from the exhaust pipe from contacting the airflow in the main ventilation pipe, thereby avoiding noise generated by the intersection of the airflows.

Furthermore, the vent holes on the exhaust pipe are distributed at one end away from the diverter plate, so that the airflow discharged from the exhaust pipe is discharged along the flow direction of the main ventilation pipe to prevent the generation of convection.

Furthermore, a plurality of evenly distributed guide plates are laid on the inner wall of the main ventilation duct, the guide plates have an inclination angle of 30-45°, and the spacing between two adjacent guide plates is 3-5 cm, so that gas reflux is reduced by the guide plates.

Furthermore, the upper end of the mesh silencer pipe is fixedly connected to a sealing ring with an air inlet pipe, and the sealing ring is fixedly connected to a guide ring matching the mesh silencer pipe, so that the airflow is guided to the mesh silencer pipe through the guide ring to reduce the backflow of the airflow.

A volute-like noise-reducing ventilation device, the use method of which is as follows:

S1, the technicians connect other air ducts to the air inlet on the main ventilation duct, so that the airflow flows into the main ventilation duct through the air inlet;

S2, when the airflow enters the main ventilation duct, it is first dispersed by the mesh silencer, so that the airflow is slowed down and dispersed into multiple branches;

S3, after the dispersed airflow enters the volute muffler, it is repeatedly refracted and buffered by multiple buffer blades in the volute muffler to absorb the kinetic energy of the airflow and decelerate the airflow;

S4, the airflow processed by the volute silencer is discharged through the exhaust pipe and intersects with the main airflow in the main ventilation pipe to flow along the exhaust direction of the main ventilation pipe.

3. Beneficial effects

Compared with the prior art, the advantages of the present invention are:

(1) The silencer of the present scheme is installed in the main ventilation duct and is located at the connection between the branch ventilation duct and the main air duct. It occupies a small space and has a high space utilization rate. When the airflow enters the vortex silencer through the air inlet, the airflow is first broken up by the mesh silencer to slow down the airflow, and then enters the volute silencer. The airflow path is extended by the volute silencer. During the flow of the airflow in the volute silencer, the kinetic energy of the airflow is absorbed and the airflow is reflected by the multiple buffer blades. At the same time, the noise generated when the decelerated airflow collides with the inner wall of the volute silencer is buffered by the buffer blades. Finally, the decelerated airflow enters the main ventilation duct through the exhaust pipe connected to the vortex silencer. The airflow discharged from the exhaust pipe is further broken up through the multiple through holes on the exhaust pipe, effectively reducing the noise generated by the collision of the high-speed airflow with the airflow in the main ventilation duct.

(2) The buffer blades in the present invention are in the shape of diamond scales. The buffer blades are made of elastic steel by stamping, and multiple buffer blades are distributed on the inner wall of the volute muffler in the shape of fish scales. The buffer blades are distributed on the inner wall of the volute muffler in the shape of fish scales, so that the inner wall of the volute muffler is covered by the buffer blades, and the distance between two adjacent buffer blades is small. The two connected buffer blades limit the buffer blade in the middle to prevent the buffer blade from loosening due to a large vibration amplitude. The lower end of the buffer blade is fixedly connected with a sound-absorbing sponge, which can be used to buffer the fish-scale buffer blades distributed in the volute muffler. When the airflow flows in the volute muffler, it is continuously buffered and diverted by the multiple buffer blades, thereby continuously weakening the airflow. At the same time, the noise generated when the two buffer blades collide with each other is reduced through the sound-absorbing sponge effect between the two buffer blades.

(3) The splitter plate is a V-shaped stainless steel plate with an included angle of 60°. One end of the exhaust pipe is fixedly connected to the inner wall of the exhaust pipe. The splitter plate is used to split the airflow, and the splitter plate is used to separate the airflow of the exhaust pipe from that of the main ventilation pipe, preventing the airflow discharged from the exhaust pipe from contacting the airflow in the main ventilation pipe, thus avoiding the noise generated by the intersection of the airflows.

(4) Multiple evenly distributed guide plates are laid on the inner wall of the main ventilation duct. The inclination angle of the guide plates is 30-45°, and the distance between two adjacent guide plates is 3-5 cm. The guide plates are used to reduce gas backflow.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a perspective view of the present invention;

Fig. 2 is a cross-sectional view of the present invention;

FIG3 is a schematic diagram of the structure of A in FIG2;

FIG4 is a schematic diagram of the structure of point B in FIG2;

FIG. 5 is a top cross-sectional view of the present invention.

1 Main ventilation pipe, 2 Air inlet, 3 Vortex muffler, 301 Air inlet pipe, 302 Volute muffler, 303 Mesh muffler, 4 Buffer blades, 5 Exhaust pipe, 6 Diverter plate

DETAILED DESCRIPTION

The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted/connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Embodiment 1: Please refer to Figures 1-4, a volute-like silencer ventilation device and a method of using the same, including a volute-like silencer ventilation device, the volute-like silencer ventilation device including a main ventilation duct 1, the outer wall of the main ventilation duct 1 is paved with a sound insulation layer, and the noise generated by the main ventilation duct 1 can be reduced by the sound insulation layer, a plurality of evenly distributed guide plates are paved on the inner wall of the main ventilation duct 1, the inclination angle of the guide plates is 30-45°, the spacing between two adjacent guide plates is 3-5cm, the guide plates are used to reduce gas reflux, the main ventilation duct 1 is fixedly connected with a plurality of evenly distributed air inlets 2, the air inlet 2 is installed with a branch main ventilation duct, and the air inlet 2 is connected to the branch main ventilation duct by a flange.

Please refer to Figures 2-4. A vortex muffler 3 is installed in the air inlet 2. The vortex muffler 3 includes an air inlet pipe 301. A volute muffler 302 is fixedly connected to the lower end of the air inlet pipe 301. A mesh muffler 303 is connected between the volute muffler 302 and the air inlet pipe 301. A sealing ring fixedly connected to the air inlet pipe 301 is connected to the upper end of the mesh muffler 303. A guide ring matching the mesh muffler 303 is fixedly connected to the sealing ring. The airflow is guided to the mesh muffler 303 through the guide ring to reduce the backflow of the airflow. The mesh muffler 303 is provided with a plurality of evenly distributed air holes.

Please refer to FIG3. A plurality of buffer blades 4 are connected to the volute muffler 302 in a staggered manner. A pair of exhaust pipes 5 are fixedly connected to the outer wall of the volute muffler 302. The exhaust pipes 5 are provided with a plurality of vents. The vents on the exhaust pipes 5 are distributed at one end away from the diverter plate 6, so that the airflow discharged from the exhaust pipes 5 is discharged along the flow diversion direction of the main ventilation pipe 1 to prevent the generation of convection. The exhaust pipes 5 are communicated with the inner cavity of the volute muffler 302. The exhaust pipes 5 are provided with a plurality of through holes. A diverter plate 6 is provided between two adjacent vortex mufflers 3.

Please refer to Figure 5. The diverter plate 6 is a V-shaped stainless steel plate. The angle of the diverter plate 6 is 60°. One end of the exhaust pipe 5 is fixedly connected to the inner wall of the exhaust pipe 5. The airflow is diverted by the diverter plate 6. The airflow of the exhaust pipe 5 is separated from the airflow of the main ventilation pipe 1 by the diverter plate 6 to prevent the airflow discharged from the exhaust pipe 5 from contacting the airflow in the main ventilation pipe 1, thereby avoiding noise generated by the intersection of airflows. The inner wall of the diverter plate 6 is fixedly connected to one end of the exhaust pipe 5 away from the volute silencer 302.

The buffer blades 4 in the present invention are in the shape of diamond scales, and the buffer blades 4 are made by stamping elastic steel, and multiple buffer blades 4 are distributed in the shape of fish scales on the inner wall of the volute muffler 302. The buffer blades 4 are distributed in the shape of fish scales on the inner wall of the volute muffler 302, so that the inner wall of the volute muffler 302 is covered by the buffer blades 4, and the distance between two adjacent buffer blades 4 is small, and the buffer blades 4 connected to each other limit the middle buffer blade 4 to prevent the buffer blade 4 from loosening due to a large vibration amplitude. The lower end of the buffer blade 4 is fixedly connected with a sound-absorbing sponge, which can be buffered by the fish-scale buffer blades 4 distributed in the volute muffler 302, so that the airflow is continuously buffered and diverted by multiple buffer blades 4 when flowing in the volute muffler 302, thereby continuously weakening the airflow. At the same time, through the sound-absorbing sponge effect between the two buffer blades 4, the noise generated when the two buffer blades 4 collide with each other is reduced.

A volute-like noise-reducing ventilation device, the use method of which is as follows:

S1, the technician connects other air ducts to the air inlet 2 on the main ventilation duct 1, so that the air flow flows into the main ventilation duct 1 through the air inlet 2;

S2, when the airflow enters the main ventilation pipe 1, it is first dispersed by the mesh silencer pipe 303, so that the airflow is slowed down and dispersed into multiple branches;

S3, after the dispersed airflow enters the volute muffler 302, it is repeatedly refracted and buffered by a plurality of buffer blades 4 in the volute muffler 302 to absorb the kinetic energy of the airflow and decelerate the airflow;

S4, the airflow processed by the volute silencer 302 is discharged through the exhaust pipe 5 and merges with the main airflow in the main ventilation pipe 1 to flow along the exhaust direction of the main ventilation pipe 1.

The silencer of the present scheme is installed in the main ventilation duct 1 and is located at the connection between the branch ventilation duct and the main ventilation duct 1. It occupies a small space and has a high space utilization rate. When the airflow enters the vortex silencer 3 through the air inlet 2, the airflow is first broken up by the mesh silencer 303 to slow down the airflow, and then enters the volute silencer 302. The airflow stroke is extended by the volute silencer 302. During the flow of the airflow in the volute silencer 302, the kinetic energy of the airflow is absorbed and the airflow is reflected by the multiple buffer blades 4. At the same time, the buffering effect of the buffer blades 4 is used to reduce the noise generated when the decelerated airflow collides with the inner wall of the volute silencer 302. Finally, the decelerated airflow enters the main ventilation duct 1 through the exhaust pipe 5 connected to the vortex silencer 3. The airflow discharged from the exhaust pipe 5 is further broken up through the multiple through holes on the exhaust pipe 5 to reduce the noise generated by the collision of the high-speed airflow with the airflow in the main ventilation duct 1.

The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims (2)

1. The utility model provides an imitative spiral case type noise elimination ventilation unit, imitative spiral case type noise elimination ventilation unit includes trunk ventilation pipe (1), fixedly connected with many evenly distributed's air inlet (2) on trunk ventilation pipe (1), install tributary trunk ventilation pipe on air inlet (2), pass through flange joint between air inlet (2) and the tributary trunk ventilation pipe, its characterized in that: the vortex muffler is characterized in that a vortex muffler (3) is arranged in the air inlet (2), the vortex muffler (3) comprises an air inlet pipe (301), the lower end of the air inlet pipe (301) is fixedly connected with a vortex muffler pipe (302), a mesh muffler pipe (303) is connected between the vortex muffler pipe (302) and the air inlet pipe (301), a plurality of uniformly distributed air holes are formed in the mesh muffler pipe (303), a plurality of buffer blades (4) which are distributed in a staggered mode are connected in the vortex muffler pipe (302), a pair of exhaust pipes (5) are fixedly connected to the outer wall of the vortex muffler pipe (302), a plurality of vent holes are formed in the exhaust pipes (5), the exhaust pipes (5) are communicated with the inner cavities of the vortex muffler pipe (302), a plurality of through holes are formed in the exhaust pipes (5), a flow dividing plate (6) is arranged between two adjacent vortex muffler pipes (3), and the inner wall of the flow dividing plate (6) is fixedly connected with one end, far away from the vortex muffler pipe (302), of the exhaust pipes (5); the buffer blades (4) are diamond-shaped and scale-shaped, the buffer blades (4) are made of elastic steel by punching, the buffer blades (4) are distributed on the inner wall of the worm-shaped silencing pipe (302) in a scale shape, and the lower ends of the buffer blades (4) are fixedly connected with sound-absorbing sponge; an acoustic insulation layer is paved on the outer wall of the trunk ventilation pipe (1); the flow dividing plate (6) is a V-shaped stainless steel plate, the included angle of the flow dividing plate (6) is 60 degrees, one end of the exhaust pipe (5) close to the scroll muffler (3) is fixedly connected with a flow guiding plate, and the flow guiding plate is fixedly connected with one end of the exhaust pipe (5); the vent holes on the exhaust pipe (5) are distributed at one end far away from the splitter plate (6), and the aperture of the vent holes is 10mm-20mm; a plurality of guide plates which are uniformly distributed are paved on the trunk ventilation pipe (1), the inclination angle of each guide plate is 30-45 degrees, and the distance between every two adjacent guide plates is 3-5cm.

2. The simulated volute type sound deadening and ventilating device as set forth in claim 1, wherein: the upper end of the mesh silencing pipe (303) is fixedly connected with a sealing ring which is matched with the air inlet pipe (301), and the sealing ring is fixedly connected with a guide ring which is matched with the mesh silencing pipe (303).