Environment-friendly silencing device capable of draining water

Abstract

The utility model discloses an environment-friendly silencing device capable of draining water, which comprises a silencer, the silencer comprises a silencing shell and a silencing material layer, a silencing cavity is arranged in the silencing shell, and the silencing material layer is arranged in the silencing cavity; a leading-out opening is formed in one end of the silencing shell, a leading-in opening and a water drainage opening are formed in the other end of the silencer, and the leading-out opening, the leading-in opening and the water drainage opening are all communicated with the silencing cavity; the lead-in opening is communicated with a conducting pipe; the smoke exhaust pipe is provided with an inlet end and an outlet end, the inlet end is communicated to the leading-out port, the outlet end is provided with a waterproof cover, the waterproof cover is provided with a discharge port, a water retaining piece is arranged in the waterproof cover and below the discharge port, and the water retaining piece and the side wall of the waterproof cover are spaced to form an exhaust interval. Waste gas exhausted by the silencer can enter the silencing cavity, noise is absorbed through the silencing material layer, meanwhile, impurities in the waste gas are reduced, and then the waste gas enters the smoke exhaust pipeline to be exhausted; and the waterproof cover of the smoke exhaust pipeline can reduce the situation that rainwater flows backwards to the smoke exhaust pipeline and the silencer.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction technology, and in particular to an environmentally friendly noise reduction device that can drain water. Background Technology

[0002] Currently, when an internal combustion engine is working, the pulse airflow generated by fuel combustion will cause high-decibel noise, which will seriously harm the environment and human health. In addition, the internal combustion engine will emit harmful exhaust gases such as sulfides and nitrogen oxides, which will also cause significant environmental damage.

[0003] In related technologies, environmentally friendly mufflers used for internal combustion engines are connected to the exhaust port of the engine unit via connecting pipes. They can purify the exhaust gas emitted by the engine unit and also reduce noise. However, in rainy weather, water can easily enter the muffler. If it is not drained in time, it can backflow into the engine unit, affecting its normal operation. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a drainage-capable environmentally friendly silencing device. The exhaust gas can enter the silencing cavity and be absorbed by the silencing material layer, while reducing impurities in the exhaust gas, before entering the smoke exhaust pipe for discharge. The waterproof cover of the smoke exhaust pipe can reduce rainwater backflow into the smoke exhaust pipe and the silencer.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] An environmentally friendly, drainage-compatible noise reduction device, comprising:

[0007] A muffler includes a muffler housing and a muffler material layer. The muffler housing has a muffler cavity, and the muffler material layer is disposed inside the muffler cavity. One end of the muffler housing has an outlet, and the other end of the muffler has an inlet and a drain. The outlet, the inlet, and the drain are all connected to the muffler cavity. The inlet is connected to a connecting pipe.

[0008] The exhaust pipe has an inlet end and an outlet end. The inlet end is connected to the outlet. The outlet end is provided with a waterproof cover. The waterproof cover has an outlet. A water baffle is provided inside the waterproof cover. The water baffle is located below the outlet. The water baffle and the side wall of the waterproof cover are spaced apart to form an exhaust gap.

[0009] Furthermore, the periphery of the water-blocking plate gradually slopes towards the center.

[0010] Furthermore, the bottom wall of the silencing cavity is provided with a guiding slope, which gradually slopes from top to bottom, and is used to guide the water flow to the drain outlet.

[0011] Furthermore, the drain outlet is equipped with a drain valve.

[0012] Furthermore, the top of the silencing cavity is provided with an expansion cavity section, the inner wall of which gradually decreases from bottom to top; the outlet is connected to the top of the expansion cavity section.

[0013] Furthermore, the sound-absorbing material layer includes a sound-absorbing plate and glass fiber cotton. The sound-absorbing plate is provided with a plurality of sound-absorbing holes, and the glass fiber cotton is disposed in the sound-absorbing holes.

[0014] Furthermore, protective nets are provided on both sides of the sound-absorbing plate, and the protective nets cover the outside of the plurality of sound-absorbing holes.

[0015] Furthermore, a catalyst is installed inside the conductive tube.

[0016] Furthermore, the bottom end of the waterproof cover is provided with a first connecting ring, and the outlet end is provided with a second connecting ring. The first connecting ring and the second connecting ring are connected by multiple screws.

[0017] Furthermore, the inlet end is provided with a third connecting ring, and the outer periphery of the outlet is provided with a fourth connecting ring. The third connecting ring and the fourth connecting ring are connected by multiple screws.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. The exhaust gas generated by the internal combustion engine unit is connected to the exhaust outlet of the internal combustion engine unit through the guide pipe. The exhaust gas is guided to the inlet of the muffler through the guide pipe and then enters the muffler's silencer cavity. Since the silencer cavity is equipped with a layer of sound-absorbing material, the noise is absorbed under the action of the sound-absorbing material layer, effectively reducing the noise.

[0020] 2. The water-blocking plate in the waterproof cover is located below the outlet, which can effectively prevent rainwater from flowing back directly through the outlet. Furthermore, any backflowing rainwater is concentrated on the bottom wall of the silencing cavity under gravity and can also be drained out through the drain outlet, reducing water accumulation. Attached Figure Description

[0021] Figure 1 This is an exploded structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall assembly structure of this utility model;

[0023] Figure 3This is a schematic diagram of the overall assembly of this utility model from another perspective;

[0024] Figure 4 This is a cross-sectional view of the present invention.

[0025] In the diagram: 10. Muffler; 11. Inlet; 12. Drain outlet; 121. Drain valve; 13. Outlet; 131. Fourth connecting ring; 14. Silencing chamber; 15. Silencing material layer; 20. Exhaust duct; 21. Second connecting ring; 211. First sealing gasket; 22. Third connecting ring; 221. Second sealing gasket; 30. Waterproof cover; 31. Exhaust outlet; 32. First connecting ring; 33. Water baffle; 34. Exhaust interval; 40. Guide pipe; 41. Catalyst; 42. Third sealing gasket. Detailed Implementation

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0027] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0029] like Figures 1-4 As shown, this utility model provides a drainage-capable environmentally friendly noise reduction device, including a silencer 10 and a smoke exhaust pipe. The silencer 10 includes a noise reduction shell and a noise reduction material layer 15. A noise reduction cavity 14 is provided inside the noise reduction shell, and the noise reduction material layer 15 is disposed inside the noise reduction cavity 14. An outlet 13 is provided at one end of the noise reduction shell, and an inlet 11 and a drain outlet 12 are provided at the other end of the silencer 10. The outlet 13, inlet 11, and drain outlet 12 are all connected to the noise reduction cavity 14. A connecting pipe 40 is connected to the inlet 11.

[0030] The aforementioned exhaust pipe has an inlet end and an outlet end. The inlet end of the exhaust pipe is connected to the outlet 13, and a waterproof cover 30 is installed at the outlet end of the exhaust pipe. The waterproof cover 30 has an outlet 31, and a water baffle 33 is installed inside the waterproof cover 30. The water baffle 33 is located below the outlet 31, and the water baffle 33 and the side wall of the waterproof cover 30 are spaced apart to form an exhaust interval 34.

[0031] Based on the above structure, when using the drainage-compatible environmentally friendly silencing device of this utility model, the environmentally friendly silencing device can be connected to the exhaust outlet of the internal combustion engine unit through the guide pipe 40. The exhaust gas generated by the internal combustion engine unit can enter the guide pipe 40, be guided through the guide pipe 40 to the inlet 11 of the muffler 10, and then enter the silencing cavity 14 of the muffler 10. Since the silencing cavity 14 is provided with a silencing material layer 15, noise is absorbed under the action of the silencing material layer 15, effectively reducing noise.

[0032] After being silenced, the exhaust gas can enter the exhaust pipe and then be guided through the exhaust interval 34 of the waterproof cover 30 to the exhaust outlet 31 for discharge. During the exhaust process, particulate matter in the exhaust gas can be blocked and retained by the sound-absorbing material layer 15 and the water baffle 33, which can effectively reduce the large particulate matter in the exhaust gas and reduce environmental pollution.

[0033] The water-blocking plate 33 in the waterproof cover 30 is located below the outlet 31, which can effectively prevent rainwater from flowing back directly through the outlet 31. Furthermore, the backflowing rainwater is concentrated on the bottom wall of the sound-absorbing cavity 14 under the action of gravity, and can also be led out through the drain 12, reducing the presence of water accumulation.

[0034] Furthermore, the periphery of the water-blocking plate 33 gradually slopes towards the center. Since the water-blocking plate 33 is positioned below the outlet 31, it can receive rainwater entering through the outlet 31 and guide it towards the center, effectively reducing direct backflow of rainwater.

[0035] Furthermore, the bottom wall of the muffler 14 is provided with a guiding slope, which gradually slopes from top to bottom. The guiding slope is used to guide the water flow to the drain outlet 12. When it rains, a small amount of rainwater may enter the muffler 10. If it is not drained in time, it will backflow into the internal combustion engine. Therefore, a guiding slope is provided on the bottom wall of the muffler 10, so that the bottom wall has a certain slope, which is used to guide the accumulated water to the drain outlet 12. The accumulated water that has entered is discharged through the drain outlet 12, preventing the accumulated water entering the muffler 14 from entering the guide pipe 40. Thus, it can effectively prevent rainwater from backflowing into the internal combustion engine unit.

[0036] Furthermore, the drain outlet 12 is equipped with a drain valve 121. When draining the water accumulated in the silencer 10, the drain valve 121 can be opened, while during normal operation, the drain valve 121 can be closed.

[0037] Furthermore, the top of the silencing cavity 14 is provided with an expansion cavity section, the inner wall of which gradually decreases from bottom to top; the outlet 13 is connected to the top of the expansion cavity section.

[0038] In this way, after the exhaust gas from the fuel unit is discharged into the guide pipe 40 through the exhaust outlet, it enters the silencing cavity 14 through the guide pipe 40. After being treated by multiple silencing material layers 15 in the silencing cavity 14 for noise reduction, it flows upward to the expansion cavity section. Since the expansion cavity gradually narrows from bottom to top, the change in the cross-section of the cavity section can be used to change the acoustic impedance when the sound wave propagating along the cavity section encounters a sudden change in cross-section. Some of the sound wave will be reflected back to the sound source, thereby reducing the sound energy propagating forward and achieving the silencing effect. In addition, the design of the inner wall gradually decreasing from bottom to top can change the flow state of the airflow in the cavity, further enhancing the reflection and interference of sound waves and improving the silencing efficiency.

[0039] Furthermore, the sound-absorbing material layer 15 includes a sound-absorbing plate and glass fiber cotton. The sound-absorbing plate has multiple sound-absorbing holes, and glass fiber cotton is placed inside the sound-absorbing holes. The sound-absorbing holes on the sound-absorbing plate allow sound waves to enter the interior of the material, changing the sound wave propagation path and causing sound wave reflection, refraction, and interference, thus consuming sound energy. Glass fiber cotton is a porous sound-absorbing material. After sound waves enter the pores, they cause the fibers to vibrate, and the sound energy is converted into heat energy and dissipated through friction and viscous resistance, thereby reducing noise. The combination of a perforated plate and glass fiber sound-absorbing cotton is used to absorb mid-to-high frequency noise. The combination of the two can effectively absorb noise over a wide frequency range and improve the sound absorption effect.

[0040] Of course, in related technologies, the sound-absorbing material layer 15 can also be made of materials with good sound absorption properties such as slag wool and polyester fiber, or it can be made of slag wool, polyester fiber and other materials combined with metal foil as a substrate layer, which can absorb sound wave energy and reduce the influence of reflected waves.

[0041] Furthermore, protective nets are installed on both sides of the sound-absorbing panel, covering the outside of multiple sound-absorbing holes. These nets protect the sound-absorbing panel from external impacts, preventing damage and deformation of the sound-absorbing holes, thus maintaining the structural integrity and sound-absorbing performance of the panel. Simultaneously, they prevent the sound-absorbing materials such as fiberglass wool inside the sound-absorbing holes from being touched or pulled by external objects, ensuring the structural stability of the sound-absorbing material layer and resulting in a more stable sound-absorbing effect.

[0042] Furthermore, a catalyst 41 is installed inside the guide pipe 40. The catalyst 41 can be a three-way catalytic converter 41 in the prior art. It is installed inside the guide pipe 40. Since the guide pipe 40 is connected to the exhaust gas outlet of the internal combustion engine, the internal combustion engine enters the guide pipe 40. The catalyst 41 can absorb harmful substances such as sulfides and nitrogen oxides in the exhaust gas discharged after the internal combustion engine is burned. It can effectively reduce the emission of pollutants in the exhaust gas and reduce the pollution to the atmospheric environment.

[0043] Furthermore, to facilitate the assembly of the waterproof cover 30 and the exhaust pipe, a first connecting ring 32 can be provided at the bottom of the waterproof cover 30, and a second connecting ring 21 can be provided at the outlet end. Both the first connecting ring 32 and the second connecting ring 21 are provided with multiple connecting holes. During assembly, the multiple connecting holes of the first connecting ring 32 and the second connecting ring 21 correspond, and then they are connected by multiple screws. This facilitates the assembly and disassembly of the waterproof cover 30 and the exhaust pipe.

[0044] Similarly, a third connecting ring 22 can be provided at the inlet end, and a fourth connecting ring 131 can be provided on the outer periphery of the outlet 13. Both the third connecting ring 22 and the fourth connecting ring 131 are provided with multiple connecting holes. During assembly, the multiple connecting holes of the third connecting ring 22 and the fourth connecting ring 131 correspond to each other, and then they are connected by multiple screws. This facilitates the disassembly and assembly of the exhaust pipe and the muffler 10.

[0045] Of course, to improve the sealing performance of the assembly position between the waterproof cover 30 and the exhaust pipe, a first sealing gasket 211 can be provided between the first connecting ring 32 and the second connecting ring 21 of the waterproof cover and the exhaust pipe to improve the sealing and waterproof performance of the connection position. Similarly, a second sealing gasket 221 can be provided between the third connecting ring 22 and the fourth connecting ring 131 of the exhaust pipe and the muffler 10 to improve the sealing and waterproof performance of the connection position. Furthermore, a third sealing gasket 42 can be provided at the connection position between the guide pipe 40 and the inlet 11 of the muffler 10, thus also improving the sealing and waterproof performance of the connection position.

[0046] It should be noted that the first, second, and third sealing gaskets mentioned above can be selected from existing graphite gaskets, which are mainly resistant to high temperatures and have good corrosion resistance. They can be used for sealing liquids and gases. Their main function in this application is for use with the exhaust gas of internal combustion engine units. Since the exhaust gas discharged from internal combustion engine units is at high temperatures, the selection of graphite gaskets can withstand high temperatures and improve the service life of the sealing structure.

[0047] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model.

Claims

1. A drainage-capable, environmentally friendly noise reduction device, characterized in that, include, A muffler includes a muffler housing and a muffler material layer. The muffler housing has a muffler cavity, and the muffler material layer is disposed inside the muffler cavity. One end of the muffler housing has an outlet, and the other end of the muffler has an inlet and a drain. The outlet, the inlet, and the drain are all connected to the muffler cavity. The inlet is connected to a connecting pipe. The exhaust pipe has an inlet end and an outlet end. The inlet end is connected to the outlet. The outlet end is provided with a waterproof cover. The waterproof cover has an outlet. A water baffle is provided inside the waterproof cover. The water baffle is located below the outlet. The water baffle and the side wall of the waterproof cover are spaced apart to form an exhaust gap.

2. The environmentally friendly silencing device with drainage capability according to claim 1, characterized in that, The periphery of the water-blocking plate gradually slopes towards the center.

3. The environmentally friendly silencing device with drainage capability according to claim 1, characterized in that, The bottom wall of the silencing cavity is provided with a guiding slope, which gradually slopes from top to bottom and is used to guide the water flow to the drain outlet.

4. The environmentally friendly silencing device with drainage capability according to claim 3, characterized in that, The drain outlet is equipped with a drain valve.

5. The environmentally friendly silencing device with drainage capability according to claim 1, characterized in that, The top of the silencing cavity is provided with an expansion section, the inner wall of which gradually decreases from bottom to top; the outlet is connected to the top of the expansion section.

6. The environmentally friendly silencing device with drainage capability according to any one of claims 1-5, characterized in that, The sound-absorbing material layer includes a sound-absorbing plate and glass fiber cotton. The sound-absorbing plate is provided with a plurality of sound-absorbing holes, and the glass fiber cotton is disposed in the sound-absorbing holes.

7. The environmentally friendly silencing device with drainage capability according to claim 6, characterized in that, The sound-absorbing plate is provided with protective nets on both sides, and the protective nets cover the outside of the plurality of sound-absorbing holes.

8. The environmentally friendly silencing device with drainage capability according to any one of claims 1-5, characterized in that, A catalyst is installed inside the conductive tube.

9. The environmentally friendly silencing device with drainage capability according to any one of claims 1-5, characterized in that, The bottom of the waterproof cover is provided with a first connecting ring, and the outlet end is provided with a second connecting ring. The first connecting ring and the second connecting ring are connected by multiple screws.

10. The environmentally friendly silencing device with drainage capability according to claim 9, characterized in that, The inlet end is provided with a third connecting ring, and the outer periphery of the outlet is provided with a fourth connecting ring. The third connecting ring and the fourth connecting ring are connected by multiple screws.

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