A new type of sound attenuation ventilation pipe for a ship

Abstract

This utility model belongs to the field of marine engineering technology, and particularly relates to a novel silencer ventilation pipe for ships. It includes a cylindrical body, inside which a fan and four baffles are installed. Between adjacent baffles are channels for noise flow. Noise generated by the fan enters three of these channels, where sound-absorbing cotton absorbs the noise. The noise then enters a connecting column, where it is silenced by rotating along a swirling space. It then enters a sound transmission column, where it flows through a circulation space to a sound-diffusing column, exiting through eight sound outlets. By using three channels, a spirally rotating space, an "S"-shaped circulation channel, and eight sound outlets, the silencer path is lengthened, and the silencer process is extended, thus dispersing the noise. Compared with existing technologies, this utility model improves the silencer effect.

Description

Technical Field

[0001] This utility model relates to the field of marine engineering technology, and more specifically, it relates to a novel silencer ventilation pipe for ships. Background Technology

[0002] In the field of marine engineering, ventilation systems play a crucial role. They are responsible for providing fresh air to the various compartments of a ship and removing stale air from the compartments to maintain the working and living environment for the crew. However, fans are installed in the ventilation system to expel stale air.

[0003] For example, the authorization announcement number CN218086000U discloses a marine silencing ventilation pipe, which includes a cylinder, several silencing plates are inclinedly arranged inside the cylinder, adjacent silencing plates are arranged opposite each other, silencing cotton is fixedly arranged on the surface of the silencing plates, a fan is provided inside the cylinder, and a silencing component is provided inside the cylinder. The silencing component is used to reduce the noise generated by the fan rotation.

[0004] In the above, the noise generated by the fan flows sequentially between adjacent sound-absorbing plates. Because there is only one channel for the noise to flow, the noise energy is concentrated, making it difficult to effectively disperse the noise. Since the path of this flow channel is short, it is impossible to disperse the noise, resulting in a reduction in the sound-absorbing effect. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a new type of noise-absorbing ventilation pipe for ships that disperses noise and improves the noise-absorbing effect by increasing the noise-absorbing path.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A novel silencer ventilation duct for ships includes a cylindrical body, a fan installed inside the cylindrical body and mounted on the inner wall of the cylindrical body, and several vertically arranged baffles inside the cylindrical body, with the baffles positioned to one side of the fan and fixedly connected to the inner wall of the cylindrical body.

[0008] There are channels between adjacent partitions for noise to pass through.

[0009] The passageway is equipped with connecting pillars, sound transmission pillars, and sound diffusion pillars.

[0010] The sound transmission column is placed between the connecting column and the sound diffusion column, and both the sound transmission column and the sound diffusion column are connected to the inner wall of the channel.

[0011] The connecting post is threaded, and the threads are fixedly connected to the outer wall of the connecting post and the inner wall of the channel.

[0012] There is a rotational space between the outer wall of the connecting column, the threads, and the partition plate for noise transmission.

[0013] The sound transmission column is equipped with a silencer, and an "S"-shaped flow space is formed between the silencer and the inner wall of the sound transmission column. This flow space is connected to the rotation space.

[0014] The sound-diffusing column has several sound outlets for noise to escape, and the sound outlets are connected to the circulation space.

[0015] The present invention is further configured such that: the silencing component includes a plurality of first sound-blocking plates and a plurality of second sound-blocking plates, the first sound-blocking plates and the second sound-blocking plates are distributed vertically, one side of the first sound-blocking plate is fixedly connected to the inner wall of the sound transmission column, and the other side is placed between adjacent second sound-blocking plates, one side of the second sound-blocking plate is fixedly connected to the inner wall of the sound transmission column, and the other side is placed between adjacent first sound-blocking plates.

[0016] The present invention is further configured such that both the first sound-blocking plate and the second sound-blocking plate are inclined.

[0017] The present invention is further configured such that: a first sound-absorbing cotton is provided on the sound outlet, and the first sound-absorbing cotton is connected to the inner wall of the sound outlet.

[0018] The present invention is further provided with a second sound-absorbing cotton material fixedly connected to the inner wall of the channel.

[0019] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0020] The noise generated by the fan enters three channels. The second sound-absorbing cotton in each channel absorbs the noise, which then enters the connecting column. The noise is absorbed by rotating along the rotating space, and then enters the sound transmission column. The noise flows through the circulation space to the sound dispersion column, and then flows out from the eight sound outlets. By passing through the three channels, the spiral rotating space, the "S"-shaped circulation channel, and the eight sound outlets, the noise absorption path is lengthened, and the noise absorption process is also lengthened. In this way, the noise is dispersed by lengthening the noise absorption path, thereby improving the noise absorption effect. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of an embodiment of the present utility model;

[0022] Figure 2 This is a structural diagram of the connecting column, sound transmission column, and sound diffusion column of this utility model.

[0023] 1. Cylinder body; 2. Fan; 3. Baffle; 4. Channel; 5. Connecting column; 6. Sound transmission column; 7. Sound diffusion column; 8. Thread; 9. Silencing component; 10. Rotation space; 11. Flow space; 12. Sound outlet.

[0024] Second sound-absorbing cotton 13, motor 201, swing fan blade 202, first sound baffle 901, second sound baffle 902. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "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.

[0027] like Figures 1 to 2 As shown, the new type of silencer ventilation pipe for ships includes a cylinder 1, and a fan 2 is installed inside the cylinder 1. The fan 2 includes a motor 201 and an oscillating fan blade 202. The motor 201 is fixed on one side of the inner wall of the cylinder 1. The output end of the motor 201 is connected to the oscillating fan blade 202. When the motor 201 is running, it can drive the oscillating fan blade 202 to rotate, so that the oscillating fan blade 202 generates airflow.

[0028] Four baffles 3 are installed inside the cylinder 1. One side of each baffle 3 is integrally formed with the inner wall of the cylinder 1, and the other side is on the side of the oscillating fan blade 202. There are channels 4 between adjacent baffles 3 for noise to pass through. Due to the four baffles 3 and the design of three channels 4, the noise generated by the fan 2 is successively reduced through the three channels 4, significantly reducing the noise generated by the rotation of the fan 2.

[0029] A second sound-absorbing cotton 13 is installed on channel 4, and the second sound-absorbing cotton 13 is bonded and fixed to the inner wall of channel 4.

[0030] Channel 4 is equipped with a connecting column 5, a sound transmission column 6, and a sound diffusion column 7.

[0031] The connecting column 5 is fitted with a thread 8, which is fixedly connected to the outer wall of the connecting column 5 and the inner wall of the channel 4. There is a rotation space 10 between the outer wall of the connecting column 5, the thread 8 and the partition 3 for noise transmission.

[0032] Noise enters from one end of thread 8, is transmitted along the rotation space 10, and finally flows out from the other end of thread 8 into the sound transmission column 6.

[0033] A noise-absorbing component 9 is installed inside the sound transmission column 6. The noise-absorbing component 9 includes six first sound-blocking plates 901 and six second sound-blocking plates 902. The first sound-blocking plates 901 and the second sound-blocking plates 902 are distributed vertically. One side of the first sound-blocking plate 901 is integrally formed with the inner wall of the sound transmission column 6, and the other side is placed between adjacent second sound-blocking plates 902. One side of the second sound-blocking plate 902 is integrally formed with the inner wall of the sound transmission column 6, and the other side is placed between adjacent first sound-blocking plates 901. This forms a flow space 11 between the inner wall of the sound transmission column 6, the first sound-blocking plates 901 and the second sound-blocking plates 902. The flow space 11 is S-shaped, and noise flows sequentially through the flow space 11 into the sound-diffusing column 7.

[0034] The first sound-blocking plate 901 and the second sound-blocking plate 902 are staggered to form a more complex noise reduction path, which can improve the noise reduction effect. Since both the first sound-blocking plate 901 and the second sound-blocking plate 902 are inclined, the noise transmission path is extended, further improving the noise reduction effect.

[0035] The sound-emitting column 7 has eight sound outlets 12, and each sound outlet 12 has a first sound-absorbing cotton.

[0036] The first sound-absorbing cotton is bonded and fixed to the sound outlet 12, so that noise can be transmitted to the outside through the eight sound outlets 12, thereby dispersing the noise. Through the three channels 4 and the eight sound outlets 12, there are twenty-four paths for the noise to be transmitted to the outside, thus reducing the volume of the noise transmitted to the outside.

[0037] Working principle: The noise generated by fan 2 enters three channels 4. The second sound-absorbing cotton 13 in channel 4 absorbs the noise. Then it enters the connecting column 5. The noise is absorbed by rotating along the rotating space 10. Then it enters the sound transmission column 6. The noise flows through the circulation space 11 and then to the sound dispersing column 7. The noise flows out from the eight sound outlets 12. By passing through the three channels 4, the spiral rotating space 10, the "S"-shaped circulation channel 4 and the eight sound outlets 12, the noise absorption path is lengthened, and the noise absorption process is also lengthened. In this way, the noise is dispersed by lengthening the noise absorption path, thereby improving the noise absorption effect.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel silencer ventilation duct for ships, comprising a cylindrical body (1), a fan (2) disposed inside the cylindrical body (1), the fan (2) being positioned on the inner wall of the cylindrical body (1), characterized in that, The cylinder (1) is provided with several vertically arranged partitions (3), which are placed on one side of the fan (2) and are fixedly connected to the inner wall of the cylinder (1). There is a passage (4) between adjacent partitions (3) for noise to flow. The channel (4) is equipped with a connecting column (5), a sound transmission column (6) and a sound dispersion column (7). The sound transmission column (6) is placed between the connecting column (5) and the sound diffusion column (7), and both the sound transmission column (6) and the sound diffusion column (7) are connected to the inner wall of the channel (4). The connecting column (5) is spirally provided with a thread (8), which is fixedly connected to the outer wall of the connecting column (5) and the inner wall of the channel (4) respectively. There is a rotational space (10) between the outer wall of the connecting column (5), the thread (8) and the partition (3) for noise transmission. The sound transmission column (6) is equipped with a silencer (9), and an "S"-shaped flow space (11) is formed between the silencer (9) and the inner wall of the sound transmission column (6). The flow space (11) is connected to the rotation space (10). The sound-emitting column (7) has several sound outlets (12) for noise to flow out, and the sound outlets (12) are connected to the circulation space (11).

2. The novel silencer ventilation duct for ships according to claim 1, characterized in that, The silencing component (9) includes several first sound-blocking plates (901) and several second sound-blocking plates (902), with the first sound-blocking plates (901) and the second sound-blocking plates (902) distributed vertically. The first sound-blocking plate (901) is fixedly connected to the inner wall of the sound transmission column (6) on one side, and the other side is placed between the adjacent second sound-blocking plate (902). The second sound-blocking plate (902) is fixedly connected to the inner wall of the sound transmission column (6) on one side, and the other side is placed between the adjacent first sound-blocking plate (901).

3. A new type of sound attenuation ventilation pipe for ships according to claim 2, characterized in that, Both the first sound-blocking plate (901) and the second sound-blocking plate (902) are inclined.

4. A novel silencer ventilation duct for ships according to claim 1, characterized in that, The sound outlet (12) is provided with a first sound-absorbing cotton, which is connected to the inner wall of the sound outlet (12).

5. A new type of sound attenuation ventilation pipe for ships according to claim 1, characterized in that, The channel (4) is provided with a second sound-absorbing cotton (13) that is fixedly connected to the inner wall of the channel (4).

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