Double-cylinder silencer

Abstract

An inner silencing barrel and an outer silencing barrel are both arranged to be of an inner-outer-ring structure, a baffle covers an inlet of an inner-layer flow-limiting silencing device, impact noise and the flow speed are reduced when airflow flows in, and then airflow flowing out of the inner silencing barrel enters an outer silencing barrel on the outer layer and flows out of the outer-layer flow-limiting silencing device. The impact strength is further effectively reduced, staged silencing and sound insulation are achieved through the inner-layer annular flow-limiting silencing device and the outer-layer annular flow-limiting silencing device, and the proportion of noise penetrating out of the outer side of the silencing barrel is further relieved and reduced; the explosion-proof devices are arranged on the inner-layer flow-limiting silencing devices and the outer-layer flow-limiting silencing devices of the inner silencing barrel and the outer silencing barrel, so that the strength and the working stability of the silencing barrels are improved, and the structures of the silencing barrels cannot be damaged by high-pressure airflow to generate noise; and due to the existence of the inner silencing barrel, the impact force of inflow airflow is reduced to the maximum extent, the silencing effect of the outer silencer is further doubled with half the effort, and the silencing effect is more obvious.

Description

Technical Field

[0001] The utility model relates to the technical field of air purification equipment, in particular to a double-tube silencer. Background Art

[0002] With the rapid development of industrialization, industrial equipment technology is constantly innovating.

[0003] In recent years, the demand for large industrial equipment such as air purifiers and air compressors has been increasing. However, large equipment, especially large equipment products such as air purifiers and air compressors used in large workshops, generates a lot of noise when the exhaust pressure and high-speed airflow are discharged. High noise in workshops is a big problem. In the process of airflow diversion, various manufacturers adopt process flows such as extended flow channels to minimize the noise generated by gas explosions and strong flow impacts during equipment operation. There are also single-tube diversion and silencing devices in operation, but the effect is minimal and the noise problem has always been difficult to solve effectively.

[0004] A silencer device that can effectively suppress the noise of air purification equipment is in great demand at present. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a double-barrel silencer, which can effectively solve the technical problems of excessive noise and poor noise reduction effect in the working process of air purifiers in the existing market.

[0006] The following technical solution is provided to solve the problem: a double-tube silencer, comprising an upper flange, a lower flange, and an outer silencer connected between the upper and lower flanges, an inner silencer is arranged on the inner side of the outer silencer, the outer silencer comprises an inner layer flow-limiting silencer and an outer layer flow-limiting silencer, an air flow inlet is arranged on the lower flange, the air flow inlet is connected to the silencer air inlet of the silencer, a baffle is arranged at the silencer air inlet, air flow holes are arranged on the baffle, the inner layer flow-limiting silencer is a cylindrical structure, an inner mesh explosion-proof device is arranged on the inner and outer sides of the inner layer flow-limiting silencer, a noise reduction and impurity removal layer is arranged between the two layers of the inner mesh explosion-proof devices, and the inner and outer sides of the outer layer flow-limiting silencer are arranged An outer net explosion-proof device, a sound-absorbing and noise-reducing layer is arranged between the two layers of the outer net explosion-proof device; the inner silencer comprises an inner barrel sound-absorbing and noise-reducing layer and an inner barrel exhaust layer, the baffle is arranged in the inner barrel exhaust layer, the bottom wall of the inner barrel exhaust layer and the lower flange are threadedly fixedly connected, the inner barrel exhaust layer is arranged on the outside of the inner barrel sound-absorbing and noise-reducing layer, the inner silencer comprises an inner barrel sound-absorbing and noise-reducing layer and a flange for closing the inner silencer is arranged on the upper end of the inner barrel exhaust layer, the inner barrel sound-absorbing and noise-reducing layer is a three-layer structure of inner and outer stainless steel mesh covers wrapped with glass fiber cloth layers, the inner barrel exhaust layer is a three-layer structure of inner and outer stainless steel mesh covers wrapped with three layers of diatom mud material layers pressed together, and exhaust holes are arranged on the outer stainless steel cylinders of the inner silencer and the outer silencer.

[0007] The inner net explosion-proof device and the outer net explosion-proof device are inner cylinder exhaust layers, and the explosion-proof net cover on the outer side of the outer net explosion-proof net cover is a combined net cover formed by pressing four layers of stainless steel nets together, the inner noise reduction and impurity removal layer is a laminated body of ten layers of glass fiber composite material thin layers, the outer noise reduction and impurity removal layer includes a glass fiber cloth layer and a diatom mud material layer, the diatom mud material layer is arranged on the outer layer, the glass fiber cloth layer is arranged on the inner layer, the diatom mud material layer is a combined layer after pressing three layers of diatom mud material layers together, the glass fiber cloth layer is a combined layer after pressing two layers together, and the baffle is a circular array of circular holes.

[0008] The upper and lower flanges of the design are connected as a whole with the silencer, and the lower flange, outer silencer and inner silencer are firmly connected as a whole, so the overall strength is effectively guaranteed. No additional support and connection structure is provided, and it can be preferably placed vertically during installation to avoid the shear stress caused by lateral vibration on the intake pipe that affects the working life of the connection part, and at the same time avoid the emission of shaking noise between spare parts under impact during the working process; a baffle is provided at the airflow inlet of the inner silencer, and the lower flange and the baffle are threadedly fastened, and the connection stability of the silencer and the flange is further improved; the inner and outer silencers are both provided with an inner and outer double-circle structure, and the baffle covers the inlet of the inner layer current limiting silencer. When airflow flows in, the baffle The air flow holes on the plate effectively buffer the flow velocity of the air flow impact force, and then reduce its impact on the inner wall of the inner silencer, that is, reduce the impact of the incoming air flow on the upper flange, reduce the impact noise and flow velocity, and then the air flow flowing out of the inner silencer enters the outer silencer of the outer layer, flows out of the outer layer current limiting silencer, and the impact intensity is further effectively reduced. The inner and outer double-layer annular current limiting silencer realizes staged sound insulation, further alleviates and reduces the proportion of noise penetrating the outside of the silencer; explosion-proof devices are provided on the inner layer current limiting silencer and the outer layer current limiting silencer of the inner and outer silencers, which improves the strength and working stability of the silencer, and the structure of the silencer itself will not be damaged by the high-pressure airflow to generate noise.

[0009] As an improvement, the inner net explosion-proof device and the outer net explosion-proof device are stainless steel mesh covers, and the explosion-proof mesh cover on the outer side of the outer net explosion-proof mesh cover is a combined mesh cover formed by pressing four layers of stainless steel mesh together. The inner stainless steel explosion-proof mesh cover effectively improves the strength of the side wall and strongly supports the sound-absorbing material wrapped therein, relieves the impact force on the sound-absorbing material, and prevents the sound-absorbing material from being damaged and then generating new impact force noise and vibration in the airflow, with higher strength and anti-vibration and anti-noise effects; the outermost layer is set as a combined mesh cover made of four layers of stainless steel pressed together, the outer layer is more solid, the overall strength is better, and the protection and sound insulation and noise reduction effects of the outermost layer are better, which can eliminate more noise and vibration.

[0010] As an improvement, the noise reduction and impurity removal layer is a glass fiber composite laminate. The inner noise reduction and impurity removal layer is filled with a multi-layer pressed glass fiber composite material, which is tightly connected to the explosion-proof mesh cover, has better overall strength and firmness, and achieves better noise reduction and silencing effect.

[0011] As an improvement, the noise reduction and impurity removal layer is a laminate of ten layers of glass fiber composite material. The impact buffering and noise absorption effects between the layers are greatly improved, and the noise passing through the layers and then passing through the outer layer is effectively reduced.

[0012] As an improvement, the sound-absorbing and noise-reducing layer includes a glass fiber cloth layer and a diatom mud material layer, the diatom mud material layer is arranged on the outer layer, the glass fiber cloth layer is arranged on the inner layer, the diatom mud material layer is a three-layer diatom mud material layer laminated and assembled layer, and the glass fiber cloth layer is a two-layer laminated and assembled layer. The combination of diatom mud material and glass fiber cloth limits noise of multiple wavelengths, and the multi-layer structure is superimposed and combined, matching the outer stainless steel layer, and the overall high strength and high noise reduction effect are greatly improved.

[0013] As an improvement, the baffle is provided with a circular array of circular holes, which effectively buffer and evenly distribute the incoming airflow, effectively improve the uniformity of the impact force of the airflow in the next stage, and reduce noise and vibration.

[0014] As an improvement, a connecting rod is provided on the lower flange, a thread is provided at the end of the connecting rod, a connecting hole is provided on the upper flange, and the connecting rod passes through the connecting hole and is locked with a nut to achieve the connection and fastening between the upper and lower flanges and the outer silencer.

[0015] The beneficial effects created by the utility model are as follows: the upper and lower flanges are connected as a whole with the silencer, the lower flange, the outer silencer and the inner silencer are firmly connected as a whole, the overall strength is effectively guaranteed, and no additional support and connection structure is provided. It can be preferably placed vertically during installation to avoid the shear stress caused by lateral vibration on the intake pipe affecting the working life of the connection part, and at the same time avoid the emission of shaking noise between the spare parts under the impact force during the working process; a baffle is provided at the air flow inlet of the inner silencer, and the lower flange and the baffle are threadedly fastened to further improve the connection stability of the silencer and the flange; the inner and outer silencers are both provided with an inner and outer double-circle structure, the baffle covers the inlet of the inner layer current limiting silencer, and when the air flow flows in, the air flow holes on the baffle effectively buffer the impact force of the air flow to reduce the flow rate, Then, the impact on the inner wall of the inner silencer is reduced, that is, the impact of the incoming airflow on the upper flange is reduced, the impact noise and flow rate are reduced, and then the airflow flowing out of the inner silencer enters the outer silencer of the outer layer, and flows out of the outer layer current limiting silencer, and the impact intensity is further effectively reduced. The inner and outer double-layer annular current limiting silencer realizes staged sound insulation, further alleviating and reducing the proportion of noise penetrating the outside of the silencer; explosion-proof devices are provided on the inner layer current limiting silencer and the outer layer current limiting silencer of the inner and outer silencers, which improves the strength and working stability of the silencer, and the structure of the silencer itself will not be damaged by the high-pressure airflow to generate noise; the existence of the inner silencer reduces the impact force of the incoming airflow to the greatest extent, and the further silencing effect of the outer silencer is twice the result with half the effort, and the silencing effect is more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings:

[0017] Figure 1 This is a partial cross-sectional structural schematic diagram of an embodiment of the utility model;

[0018] Figure 2 yes Figure 1 Schematic diagram of the structure in cross section in side view. DETAILED DESCRIPTION

[0019] Embodiment 1

[0020] like Figure 1 , 2As shown, a specific embodiment of the utility model, a double-tube silencer, includes an upper flange 1, a lower flange 2, an outer silencer 3 connected between the upper and lower flanges, an inner silencer 4 is arranged on the inner side of the outer silencer, the outer silencer includes an inner layer flow limiting silencer and an outer layer flow limiting silencer, an air flow inlet 5 is arranged on the lower flange, the air flow inlet is connected to the silencer air inlet of the silencer, a baffle 6 is arranged at the silencer air inlet, and air flow holes 7 are arranged on the baffle, the inner layer flow limiting silencer is a cylindrical structure, an inner net explosion-proof device 8 is arranged on the inner and outer sides of the inner layer flow limiting silencer, a noise reduction and impurity removal layer 11 is arranged between the two layers of the inner net explosion-proof devices, an outer net explosion-proof device 9 is arranged on the inner and outer sides of the outer layer flow limiting silencer, and the two layers of the outer net explosion-proof device A sound-absorbing and noise-reducing layer 10 is arranged between the explosion devices; the inner silencer 4 includes an inner silencer and noise-reducing layer 12 and an inner silencer exhaust layer 13, the baffle is arranged in the inner silencer exhaust layer, the bottom wall of the inner silencer exhaust layer and the lower flange are threadedly fixedly connected, the inner silencer exhaust layer is arranged on the outside of the inner silencer and noise-reducing layer, the inner silencer and noise-reducing layer is a three-layer structure of inner and outer stainless steel mesh covers wrapped with glass fiber cloth layers, the inner silencer exhaust layer is an inner stainless steel mesh cover and an outer stainless steel tube wrapped with three layers of diatom mud material layers pressed together, exhaust holes 3-1 are arranged on the outer stainless steel tubes of the inner silencer and the outer silencer, the inner silencer includes an inner silencer and noise-reducing layer and the upper end of the inner silencer exhaust layer is provided with a flange for closing the inner silencer, the space of the inner silencer is closed, and the gas is ensured to be discharged after being silenced and noise-reduced by the inner silencer and noise-reducing layer 12 and the inner tube exhaust layer 13. The lower flange is provided with a connecting rod 14, the end of which is provided with a thread, and the upper flange is provided with a connecting hole, and the connecting rod passes through the connecting hole and is locked with a nut to achieve the connection and fastening between the upper and lower flanges and the outer silencer.

[0021] The inner net explosion-proof device and the outer net explosion-proof device are inner cylinder exhaust layers, and the explosion-proof net cover on the outer side of the outer net explosion-proof net cover is a combined net cover formed by pressing four layers of stainless steel nets together, the inner noise reduction and impurity removal layer is a laminated body of ten layers of glass fiber composite material thin layers, the outer noise reduction and impurity removal layer includes a glass fiber cloth layer and a diatom mud material layer, the diatom mud material layer is arranged on the outer layer, the glass fiber cloth layer is arranged on the inner layer, the diatom mud material layer is a combined layer after pressing three layers of diatom mud material layers together, the glass fiber cloth layer is a combined layer after pressing two layers together, and the baffle is a circular array of circular holes.

[0022] The upper and lower flanges of the design are connected as a whole with the silencer, and the lower flange, outer silencer and inner silencer are firmly connected as a whole, so the overall strength is effectively guaranteed. No additional support and connection structure is provided, and it can be preferably placed vertically during installation to avoid the shear stress caused by lateral vibration on the intake pipe that affects the working life of the connection part, and at the same time avoid the emission of shaking noise between spare parts under impact during the working process; a baffle is provided at the airflow inlet of the inner silencer, and the lower flange and the baffle are threadedly fastened, and the connection stability of the silencer and the flange is further improved; the inner and outer silencers are both provided with an inner and outer double-circle structure, and the baffle covers the inlet of the inner layer current limiting silencer. When airflow flows in, the baffle The air flow holes on the plate effectively buffer the flow velocity of the air flow impact force, and then reduce its impact on the inner wall of the inner silencer, that is, reduce the impact of the incoming air flow on the upper flange, reduce the impact noise and flow velocity, and then the air flow flowing out of the inner silencer enters the outer silencer of the outer layer, flows out of the outer layer current limiting silencer, and the impact intensity is further effectively reduced. The inner and outer double-layer annular current limiting silencer realizes staged sound insulation, further alleviates and reduces the proportion of noise penetrating the outside of the silencer; explosion-proof devices are provided on the inner layer current limiting silencer and the outer layer current limiting silencer of the inner and outer silencers, which improves the strength and working stability of the silencer, and the structure of the silencer itself will not be damaged by the high-pressure airflow to generate noise.

[0023] The inner net explosion-proof device and the outer net explosion-proof device are stainless steel mesh covers, and the explosion-proof mesh cover on the outer side of the outer net explosion-proof mesh cover is a combined mesh cover formed by pressing four layers of stainless steel mesh together. The inner stainless steel explosion-proof mesh cover effectively improves the strength of the side wall and strongly supports the sound-absorbing material wrapped therein, relieves the impact force on the sound-absorbing material, and avoids the generation of new impact noise and vibration in the airflow after the sound-absorbing material is damaged, with higher strength and anti-vibration and anti-noise effects; the outermost layer is set as a combined mesh cover made of four layers of stainless steel pressed together, the outer layer is more solid and has better overall strength, achieving better protection and sound insulation and noise reduction effects for the outermost layer, and eliminating more noise and vibration; the noise reduction and impurity removal layer is a glass fiber composite laminate, with multiple layers of pressed-together glass fiber composite material filled inside The noise reduction and debris removal layer is tightly connected to the explosion-proof mesh cover, with better overall strength and firmness, achieving better noise reduction and silencing effect; the sound-absorbing and noise-reducing layer includes a glass fiber cloth layer and a diatom mud material layer, the diatom mud material layer is arranged on the outer layer, and the glass fiber cloth layer is arranged on the inner layer, the diatom mud material layer is a composite layer after three layers of diatom mud material layers are pressed together, and the glass fiber cloth layer is a composite layer after two layers are pressed together. The combination of diatom mud material and glass fiber cloth limits noise of multiple wavelengths, and the multi-layer structure is superimposed and combined to match the outer stainless steel layer, and the overall high overall strength and high noise reduction effect are greatly improved.

[0024] The baffle has a circular array of circular holes, which effectively buffers and evenly distributes the incoming airflow, effectively improving the uniformity of the impact force of the airflow in the next stage and reducing noise and vibration.

[0025] In this embodiment, the sound-absorbing and noise-reducing layer includes a glass fiber cloth layer and a diatom mud material layer, the diatom mud material layer is arranged on the outer layer, the glass fiber cloth layer is arranged on the inner layer, the diatom mud material layer is a three-layer diatom mud material layer laminated and assembled layer, and the glass fiber cloth layer is a two-layer laminated and assembled layer. The combination of diatom mud material and glass fiber cloth limits noise of multiple wavelengths, and the multi-layer structure is superimposed and combined to match the outer stainless steel layer, and the overall high overall strength and high noise reduction effect are greatly improved.

[0026] Embodiment 2

[0027] The difference from the first embodiment is that the noise reduction and impurity removal layer is a laminated body of ten layers of glass fiber composite material, and the buffering and noise absorption effects between the layers are greatly improved, and the noise passing through the layers and then passing through the outer layer is effectively reduced;

[0028] In addition to the above preferred embodiments, the present invention has other implementation modes. Those skilled in the art can make various changes and modifications based on the present invention. As long as they do not deviate from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A double-tube silencer, comprising an upper flange (1), a lower flange (2), and an outer silencer tube (3) connected between the upper and lower flanges, characterized in that: An inner silencer (4) is arranged inside the outer silencer, and the outer silencer comprises an inner flow-limiting silencer and an outer flow-limiting silencer. An airflow inlet (5) is arranged on the lower flange, and the airflow inlet is connected to the silencer air inlet of the silencer. A baffle (6) is arranged at the silencer air inlet, and an airflow hole (7) is arranged on the baffle. The inner flow-limiting silencer is a cylindrical structure, and an inner net explosion-proof device (8) is arranged on the inner and outer sides of the inner flow-limiting silencer. A noise reduction and impurity removal layer (11) is arranged between the two layers of the inner net explosion-proof devices. An outer net explosion-proof device (9) is arranged on the inner and outer sides of the outer flow-limiting silencer. A sound-absorbing and noise-reducing layer (10) is arranged between the two layers of the outer net explosion-proof device; the inner silencer tube (4) comprises an inner tube sound-absorbing and noise-reducing layer (12) and an inner tube exhaust layer (13); the baffle is arranged in the inner tube exhaust layer; the bottom wall of the inner tube exhaust layer and the lower flange are threadedly fixedly connected; the inner tube exhaust layer is arranged on the outer side of the inner tube sound-absorbing and noise-reducing layer; the inner tube sound-absorbing and noise-reducing layer is a three-layer structure of inner and outer stainless steel mesh covers wrapped with glass fiber cloth layers; the inner tube exhaust layer is an inner stainless steel mesh cover and an outer stainless steel tube wrapped with three layers of diatom mud material layers pressed together; exhaust holes (3-1) are arranged on the outer stainless steel tubes of the inner silencer tube and the outer silencer tube.

2. A double-barrel silencer according to claim 1, characterized in that: The inner net explosion-proof device and the outer net explosion-proof device are stainless steel mesh covers, and the explosion-proof mesh cover on the outer side of the outer net explosion-proof mesh cover is a combined mesh cover formed by pressing four layers of stainless steel mesh together.

3. A double-barrel silencer according to claim 1, characterized in that: The noise reduction and impurity removal layer is a glass fiber composite material pressed body.

4. A double-barrel silencer according to claim 1, characterized in that: The noise reduction and impurity removal layer is a laminated body of ten glass fiber composite material thin layers.

5. A double-barrel silencer according to claim 1, characterized in that: The sound-absorbing and noise-reducing layer includes a glass fiber cloth layer and a diatom mud material layer. The diatom mud material layer is arranged on the outer layer, and the glass fiber cloth layer is arranged on the inner layer. The diatom mud material layer is a laminated composite layer of three diatom mud material layers, and the glass fiber cloth layer is a laminated composite layer of two layers.

6. A double-barrel silencer according to claim 1, characterized in that: The baffle plate is provided with a circular hole group in a circumferential array.

7. A double-barrel silencer according to claim 1, characterized in that: The lower flange is provided with a connecting rod (14), the end of which is provided with a thread, and the upper flange is provided with a connecting hole. After the connecting rod passes through the connecting hole, the upper flange and the lower flange are locked by a nut.

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