Marine exhaust pipeline silencer

Abstract

The utility model relates to the field of silencing, discloses a marine exhaust pipeline silencing device, and solves the problem that an existing marine exhaust pipeline silencing device is poor in filtering effect. By combining multi-stage noise reduction and filtration, noise generated when a diesel engine set exhausts is remarkably reduced, impurities in waste gas are effectively purified, the holes in the shape of a circular truncated cone and multiple layers of sound insulation are adopted, and by means of combined use of the sound absorption plate, the ceramsite plate, the cotton block and the felt plate, smooth circulation and efficient filtration of the waste gas are guaranteed; and noise transmission is greatly weakened, a quieter and healthier working environment is provided for sailors, meanwhile, the requirement for environmental protection is met, and the overall performance and comfort of the ship are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of silencing, in particular to a marine exhaust pipe silencing device. Background Art

[0002] With the continuous development of the shipping industry, the problem of ship noise pollution has received increasing attention. When the ship engine is running, the exhaust pipe will generate a lot of noise, which has an adverse impact on the crew, passengers and the surrounding environment. Therefore, the development of effective ship exhaust pipe silencers has become the key to solving the noise pollution problem.

[0003] During the operation of the existing marine exhaust pipe silencer, since the hull is driven by a diesel engine, the exhaust gas is discharged through the exhaust pipe. The exhaust gas is mixed with particulate matter and impurities. When they enter the silencing chamber or subsequent pipes, they will cause blockage or damage. The accumulation of particulate matter in the silencing chamber will affect the propagation and reflection of sound waves, reducing the silencing effect. Utility Model Content

[0004] The utility model aims to provide a ship exhaust pipe silencer, which can solve the problem of poor filtering effect of the existing ship exhaust pipe silencer by working with the device.

[0005] To achieve the above object, the utility model provides the following technical solutions: a marine exhaust pipe silencing device, comprising an air inlet pipe, a silencing chamber and an air outlet pipe, wherein the two ends of the silencing chamber are respectively fixedly connected with the air inlet pipe and the air outlet pipe, and the interior of the silencing chamber is provided with a silencing filter structure for absorbing and reducing noise and filtering impurities in the exhaust gas, and the middle of the silencing chamber is also provided with a sound absorbing structure for consuming sound wave energy;

[0006] The sound-absorbing and filtering structure comprises a sound-absorbing plate 1 arranged at one end of the sound-absorbing chamber, a sound-absorbing plate 1 arranged inside the sound-absorbing plate 1, an opening 1 arranged on the surface of the sound-absorbing plate 1, the opening 1 is in a truncated cone shape, and the side with a larger diameter of the opening 1 is close to the air intake pipe. The sound-absorbing and filtering structure also comprises a filter plate and a filter element arranged in the middle of the sound-absorbing plate 1, the filter plate is used to isolate and filter large impurities mixed in the exhaust gas, the filter element is used to isolate and filter small impurities mixed in the exhaust gas, a sound-absorbing plate 2 is arranged at the other end of the sound-absorbing plate 1, and an opening 2 is arranged on the surface of the sound-absorbing plate 2, the side with a larger diameter of the opening 2 is close to the filter element, and the diameter of the opening 1 is greater than the diameter of the opening 2;

[0007] The sound-absorbing structure comprises a second sound-isolating board arranged in the middle of the sound-absorbing chamber, and a ceramsite board is arranged at one end of the second sound-isolating board, and the ceramsite board is used for absorbing noise.

[0008] Furthermore, a cotton block for reducing noise is arranged in the middle of the second sound insulation board.

[0009] Furthermore, a felt board for consuming sound wave energy is provided at the other end of the second sound insulation board.

[0010] Furthermore, the sound receiving structure includes a sound receiving structure arranged inside the soundproofing chamber, and the sound receiving structure includes a sound insulation board three arranged at the other end of the soundproofing chamber, and a fixing plate is arranged inside the sound insulation board three.

[0011] Furthermore, a sound absorbing tube is arranged on one side of the fixing plate.

[0012] Furthermore, a plurality of the sound absorbing tubes are arranged at equal intervals, and the sound absorbing tubes are in a truncated cone shape.

[0013] Furthermore, the small diameter end of the sound absorbing tube is close to the air outlet pipe.

[0014] Furthermore, a tube groove is provided on the surface of the fixing plate, and the sound absorbing tube is fixed inside the tube groove, and the large diameter surface of the sound absorbing tube is flush with a surface of the fixing plate close to the felt board.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] The utility model proposes a ship exhaust pipe silencer. The existing ship exhaust pipe silencer has poor filtering effect. The utility model significantly reduces the noise of the diesel engine set during exhaust through the combination of multi-stage silencer and filtration, and effectively purifies impurities in the exhaust gas. The truncated cone opening and multi-layer sound insulation, and the combined use of sound-absorbing panels, ceramsite panels, cotton blocks and felt panels not only ensure the smooth circulation and efficient filtration of the exhaust gas, but also greatly weaken the propagation of noise, providing a quieter and healthier working environment for the crew, while meeting environmental protection requirements and improving the overall performance and comfort of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the overall three-dimensional cross-sectional structure of the utility model;

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the sound-absorbing and filtering structure, the second filter structure and the sound receiving structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the three-dimensional cross-sectional structure of the sound-absorbing panel of the utility model.

[0021] In the figure: 1. Inlet pipe; 2. Silence chamber; 3. Exit pipe; 4. Silencing and filtering structure; 41. Soundproofing board one; 42. Sound-absorbing board one; 43. Opening one; 44. Filter plate; 45. Filter element; 46. Sound-absorbing board two; 47. Opening two; 5. Sound-absorbing structure; 51. Soundproofing board two; 52. Ceramic particle board; 53. Cotton block; 54. Felt board; 6. Sound-receiving structure; 61. Soundproofing board three; 62. Fixing plate; 63. Sound-absorbing tube. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0024] Combination Figure 1-Figure 4 A marine exhaust pipe silencing device comprises an air inlet pipe 1, a silencing chamber 2 and an air outlet pipe 3, wherein the air inlet pipe 1 and the air outlet pipe 3 are fixedly connected to the two ends of the silencing chamber 2 respectively, and a silencing filter structure 4 for absorbing and reducing noise and filtering impurities in exhaust gas is arranged inside the silencing chamber 2, and a sound absorbing structure 5 for consuming sound wave energy is also arranged in the middle of the silencing chamber 2.

[0025] The utility model is further described below in conjunction with embodiments.

[0026] Embodiment 1:

[0027] See also Figure 1-Figure 4 The sound-absorbing and filtering structure 4 includes a sound-absorbing plate 41 arranged at one end of the sound-absorbing chamber 2, a sound-absorbing plate 42 arranged inside the sound-absorbing plate 41, an opening 43 opened on the surface of the sound-absorbing plate 42, the opening 43 is in a truncated cone shape, and the side with a larger diameter of the opening 43 is close to the intake pipe 1. The sound-absorbing and filtering structure 4 also includes a filter plate 44 and a filter element 45 arranged in the middle of the sound-absorbing plate 41, the filter plate 44 is used to isolate and filter large impurities mixed in the exhaust gas, the filter element 45 is used to isolate and filter small impurities mixed in the exhaust gas, a sound-absorbing plate 46 is arranged at the other end of the sound-absorbing plate 41, and an opening 47 opened on the surface of the sound-absorbing plate 46, the side with a larger diameter of the opening 47 is close to the filter element 45, and the diameter of the opening 43 is larger than the diameter of the opening 47. These openings not only contribute to the smooth flow of exhaust gas, but also effectively consume sound wave energy and reduce noise propagation.

[0028] The sound-absorbing structure 5 includes a sound insulation board 51 arranged in the middle of the soundproof chamber 2, and a ceramsite board 52 is arranged at one end of the sound insulation board 51, and the ceramsite board 52 is used to absorb noise. A cotton block 53 for reducing noise is arranged in the middle of the sound insulation board 51, and a felt board 54 for consuming sound wave energy is arranged at the other end of the sound insulation board 51, which further absorbs and reduces noise, so that the noise of the exhaust gas finally discharged is greatly reduced.

[0029] The sound receiving structure 6 includes a sound receiving structure 6 arranged inside the soundproofing chamber 2, and the sound receiving structure 6 includes a sound insulation board 3 61 arranged at the other end of the soundproofing chamber 2, and a fixing plate 62 is arranged inside the sound insulation board 3 61, and a sound absorbing tube 63 is arranged on one side of the fixing plate 62. A plurality of sound absorbing tubes 63 are arranged at equal intervals, and the sound absorbing tubes 63 are truncated cone-shaped, and the small diameter end of the sound absorbing tube 63 is close to the air outlet pipe 3. A tube groove is opened on the surface of the fixing plate 62, and the sound absorbing tube 63 is fixed inside the tube groove. The large diameter surface of the sound absorbing tube 63 is flush with a side of the fixing plate 62 close to the felt board 54, which effectively absorbs and reflects noise and improves the overall soundproofing effect.

[0030] Specifically, first, the intake pipe 1 is connected to the diesel engine of the ship, so that the diesel engine generates exhaust gas by driving the ship, which is transmitted to the interior of the silencing chamber 2 through the connected intake pipe 1 for treatment and then discharged through the exhaust pipe 3. Since the diesel engine is driven strongly, there is noise when exhausting, and the sound is processed through the silencing chamber 2, so that the exhaust gas enters the first stage first, and the sound wave energy is consumed by the sound absorbing board 42 fixedly installed on the sound insulation board 41 at one end of the intake pipe 1 of the silencing chamber 2, and the sound absorbing board 42 is The surface of the filter 1 is provided with a plurality of openings 43, and the openings 43 are all in the shape of a truncated cone. These openings not only help the smooth flow of exhaust gas, but also effectively consume the energy of sound waves and reduce noise transmission. The side close to the intake pipe 1 is of large diameter, so that the exhaust gas passes through the plurality of openings 43 and is transmitted to the filter plate 44 and the filter element 45 to adsorb and filter the impurities in the exhaust gas, thereby reducing the emission of harmful substances, which is beneficial to environmental protection and the health of the crew. The exhaust gas is further transmitted to the sound absorbing plate 2 46. The surface of the sound absorbing plate 2 46 has a plurality of openings 43. The dry opening 47 is also in the shape of a truncated cone. The sound-absorbing plate 46 and a plurality of openings 47 consume the sound wave energy again. At this time, the exhaust gas enters the second stage. The ceramsite plate 52 fixed by the sound insulation plate 51 absorbs the sound waves of the noise, thereby reducing the sound. The sound wave energy of the noise is consumed and weakened by the cotton block 53 and the felt plate 54, and the noise is further absorbed and weakened, so that the noise of the exhaust gas discharged is greatly reduced, which improves the sound environment during the operation of the ship, and then the exhaust gas and noise are In the third stage of entering and exiting, a fixed plate 62 is connected to the sound insulation board 61, and a plurality of tube grooves are opened on the surface of the fixed plate 62. Sound-absorbing tubes 63 are fixedly arranged inside the plurality of tube grooves. The large diameter surface of the sound-absorbing tube 63 is flush with the side of the fixed plate 62 close to the felt board 54. The sound-absorbing tube 63 is in a truncated cone shape, which can maximize the use of space and effectively absorb and reflect noise, thereby improving the overall sound insulation effect. At the same time, the combination of multi-level sound insulation and sound-absorbing materials makes the structure of the sound insulation chamber 2 more compact and efficient.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A marine exhaust pipe silencing device, comprising an air inlet pipe (1), a silencing chamber (2) and an air outlet pipe (3), wherein the air inlet pipe (1) and the air outlet pipe (3) are fixedly connected to the two ends of the silencing chamber (2), respectively, and characterized in that: The interior of the muffler chamber (2) is provided with a muffler filter structure (4) for absorbing and reducing noise and filtering impurities in the exhaust gas, and the middle of the muffler chamber (2) is also provided with a sound absorbing structure (5) for consuming sound wave energy; The sound-absorbing and filtering structure (4) comprises a sound-absorbing plate (42) arranged at one end of the sound-absorbing chamber (2), a sound-absorbing plate (42) arranged inside the sound-absorbing plate (41), and an opening (43) provided on the surface of the sound-absorbing plate (42). The opening (43) is in the shape of a truncated cone, and the side with a larger diameter of the opening (43) is close to the air intake pipe (1). The sound-absorbing and filtering structure (4) also comprises a filter plate (44) and a filter arranged in the middle of the sound-absorbing plate (41). The filter element (45) is used to isolate and filter large impurities mixed in the exhaust gas, and the filter element (45) is used to isolate and filter small impurities mixed in the exhaust gas. The second sound absorbing plate (46) is arranged at the other end of the first sound insulation plate (41), and the second opening (47) is arranged on the surface of the second sound absorbing plate (46). The larger diameter side of the second opening (47) is close to the filter element (45), and the diameter of the first opening (43) is larger than the diameter of the second opening (47); The sound absorbing structure (5) comprises a second sound insulation board (51) arranged in the middle of the soundproof chamber (2), and a ceramsite board (52) is arranged at one end of the second sound insulation board (51), and the ceramsite board (52) is used for absorbing noise.

2. A marine exhaust pipe silencing device according to claim 1, characterized in that: A cotton block (53) for reducing noise is arranged in the middle of the second sound insulation board (51).

3. A marine exhaust pipe silencing device according to claim 2, characterized in that: The other end of the second sound insulation board (51) is provided with a felt board (54) for consuming sound wave energy.

4. A marine exhaust pipe silencing device according to claim 1, characterized in that: The sound receiving structure (6) comprises a sound receiving structure (6) arranged inside the soundproofing chamber (2), the sound receiving structure (6) comprises a soundproofing board three (61) arranged at the other end of the soundproofing chamber (2), and a fixing plate (62) is arranged inside the soundproofing board three (61).

5. A marine exhaust pipe silencing device according to claim 4, characterized in that: A sound absorbing tube (63) is provided on one side of the fixing plate (62).

6. A marine exhaust pipe silencing device according to claim 5, characterized in that: A plurality of the sound absorbing tubes (63) are arranged at equal intervals, and the sound absorbing tubes (63) are in a truncated cone shape.

7. A marine exhaust pipe silencing device according to claim 6, characterized in that: The small diameter end of the sound absorbing tube (63) is close to the air outlet pipe (3).

8. A marine exhaust pipe silencing device according to claim 5, characterized in that: The surface of the fixing plate (62) is provided with a tube groove, and the sound absorbing tube (63) is fixed inside the tube groove. The large diameter surface of the sound absorbing tube (63) is flush with a surface of the fixing plate (62) close to the felt plate (54).

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