A gooseneck ventilation duct with a silencer

Abstract

This utility model discloses a gooseneck ventilation duct with a silencing device, comprising a pipe, a bend fixedly installed at the upper end of the pipe, and a silencing mechanism fixedly installed at the lower end of the bend. The silencing mechanism includes a silencing shell, a guide port, a guide pipe, a silencing sleeve, a silencing cavity, and through holes. The silencing shell is installed at the lower end of the bend, and a guide port is provided inside the silencing shell. Multiple guide ports are provided and evenly spaced inside the silencing shell. A guide pipe is fixedly installed at the lower end of the guide port, and a silencing sleeve is sleeved on the outside of the guide pipe. A silencing cavity is provided between the silencing sleeve and the guide pipe. Several through holes are evenly opened on the outer surface of the guide pipe. This utility model has good performance. For the air outlet of the pipe, it not only acts as a filter to prevent large debris or small animals from entering the pipe, but also performs silencing, thereby effectively reducing noise at the air outlet.

Description

Technical Field

[0001] This utility model relates to the field of ventilation duct technology, specifically a gooseneck ventilation duct with a silencer. Background Technology

[0002] Gooseneck ventilation ducts are devices used for ventilation on the open decks of ships. Their design uses a curved "gooseneck" structure to achieve rain protection, low resistance, and flexible arrangement, making them suitable for various types of ships and offshore platforms.

[0003] In existing gooseneck ventilation ducts, airflow easily forms vortices and generates noise when passing through curved sections such as the gooseneck. Existing solutions, such as the gooseneck ventilation duct with a silencing device described in Chinese Patent Application No. 202120187857.4, involve covering the gooseneck section with sound-absorbing cotton for noise reduction. However, in addition, a filter is typically installed at the air outlet of the ventilation duct. The presence of the filter increases airflow resistance, leading to changes in airflow speed and pressure fluctuations, thus generating noise. Therefore, simply covering the gooseneck section with sound-absorbing cotton has limited noise reduction effect at the air outlet. Therefore, an improved gooseneck ventilation duct with a silencing device is needed to address this problem. Utility Model Content

[0004] The purpose of this invention is to provide a gooseneck ventilation duct with a silencer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gooseneck ventilation duct with a silencing device, comprising a pipe, a bend fixedly provided at the upper end of the pipe, and a silencing mechanism fixedly provided at the lower end of the bend. The silencing mechanism includes a silencing shell, a guide port, a guide pipe, a silencing sleeve, a silencing cavity, and through holes. The lower end of the bend is provided with a silencing shell, and a guide port is provided inside the silencing shell. Multiple guide ports are provided and evenly spaced inside the silencing shell. A guide pipe is fixedly provided at the lower end of the guide port. A silencing sleeve is sleeved on the outside of the guide pipe. A silencing cavity is provided between the silencing sleeve and the guide pipe. Several through holes are evenly opened on the outer surface of the guide pipe.

[0006] Preferably, the inner sidewall of the silencing sleeve and the inner sidewall of the bend are both provided with sound-absorbing material. The sound-absorbing material (sound-absorbing cotton) can ensure the sound absorption and silencing effect inside the silencing sleeve and the bend.

[0007] Preferably, the guide port is funnel-shaped, which facilitates flow diversion and reduces the damping of airflow entering the guide tube.

[0008] Preferably, a rubber filler block is provided in the gap between the plurality of sound-absorbing sleeves. The filler block can fill the gap between the sound-absorbing sleeves to ensure the stability between the sound-absorbing sleeves and prevent the sound-absorbing sleeves from generating vibration noise.

[0009] Preferably, a connecting frame is provided between the bend, the pipe, and the silencing housing. Fixing holes are provided at the four corners of the outer surface of the connecting frame. The bend, the pipe, and the silencing housing can be fixedly connected by screws through the connecting frame and the fixing holes. At the same time, it can be easily disassembled so that the inside of the silencing housing can be cleaned or replaced.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] After the airflow enters the guide tube, it can be directly discharged into the external environment. However, the sound waves that radiate outwards can enter the silencing cavity through the through hole. Generally, the sound waves are absorbed and reduced in the silencing cavity by contacting the sound-absorbing material on the inner side wall of the silencing sleeve. A portion of the sound waves are reflected towards the through hole and cancel each other out with the sound waves that subsequently enter through the through hole. In this way, the device can significantly reduce noise at the air outlet of the pipe and improve the device's performance.

[0012] This utility model is equipped with multiple guide tubes, the purpose of which is to reduce the diameter of the guide tubes so that the multiple guide tubes can form a filter screen, which can effectively prevent large debris or small animals from entering the pipe, thereby ensuring the function of the filter screen. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a gooseneck ventilation duct with a silencer according to the present invention;

[0014] Figure 2 This is a cross-sectional view of a gooseneck ventilation duct with a silencing device according to the present invention;

[0015] Figure 3 This is an internal structural view of the silencing shell in a gooseneck ventilation duct with a silencing device according to this utility model;

[0016] Figure 4 This is an overall structural view of the guide pipe in a gooseneck ventilation duct with a silencer according to this utility model;

[0017] Figure 5 This utility model relates to a gooseneck ventilation duct with a silencer. Figure 4 The front view;

[0018] Figure 6 This is a bottom view of the overall structure of a gooseneck ventilation duct with a silencing device according to this utility model.

[0019] In the diagram: 1. Pipe; 2. Bend; 3. Silencing shell; 4. Guide port; 5. Guide tube; 6. Silencing sleeve; 7. Silencing cavity; 8. Through hole; 9. Rubber filler block; 10. Connecting frame; 11. Fixing hole. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-6 This utility model provides a technical solution: a gooseneck ventilation duct with a silencing device, comprising a pipe 1, a bend 2 fixedly installed at the upper end of the pipe 1, and a silencing mechanism fixedly installed at the lower end of the bend 2. The silencing mechanism consists of a silencing shell 3, a guide port 4, a guide pipe 5, a silencing sleeve 6, a silencing cavity 7, and a through hole 8.

[0022] The lower end of the bend 2 is connected to the muffler housing 3. The muffler housing 3 serves as the main load-bearing component of the muffler mechanism and provides installation space for other internal components.

[0023] The silencer housing 3 has multiple evenly spaced guide ports 4, which are designed in a trumpet shape. The trumpet-shaped guide ports 4 not only facilitate the diversion of airflow, but also effectively reduce the damping generated when the airflow enters the guide pipe 5, ensuring smooth airflow.

[0024] Each guide port 4 is fixedly connected to a guide tube 5 at its lower end. A sound-absorbing sleeve 6 is fitted on the outside of the guide tube 5, forming a sound-absorbing cavity 7 between the sound-absorbing sleeve 6 and the guide tube 5. Several through holes 8 are evenly distributed on the outer surface of the guide tube 5, providing a channel for sound waves to enter the sound-absorbing cavity 7.

[0025] The inner sidewalls of the silencing sleeve 6 and the inner sidewalls of the bend 2 are both provided with sound-absorbing materials (such as sound-absorbing cotton). These sound-absorbing materials can effectively absorb and dissipate the sound energy inside the silencing sleeve 6 and the bend 2, further improving the silencing effect.

[0026] Rubber filler blocks 9 are used to fill the gaps between the multiple sound-absorbing sleeves 6. The rubber filler blocks 9 not only fill the gaps between the sound-absorbing sleeves 6 to ensure the structural stability between the sound-absorbing sleeves 6, but also effectively prevent the sound-absorbing sleeves 6 from generating vibration noise due to airflow impact or equipment vibration, thus further optimizing the sound-absorbing performance.

[0027] A connecting frame 10 is provided between the bend 2, the pipe 1, and the silencing housing 3. Fixing holes 11 are provided at the four corners of the outer surface of the connecting frame 10. By using screws to connect the connecting frame 10 and the fixing holes 11, the bend 2, pipe 1, and silencing housing 3 can be easily and quickly fixedly connected. At the same time, this connection method also facilitates disassembly, making it convenient to clean the inside of the silencing housing 3 or replace related components, thus improving the maintainability of the equipment.

[0028] Working principle: When using this device, the pipe 1, bend 2, and silencer housing 3 together form a gooseneck ventilation duct. During ventilation, the final airflow is discharged from the silencer housing 3. Before being discharged, the airflow is first split at multiple guide ports 4, and then enters the guide pipe 5. Due to air pressure, the normal airflow will not enter the silencer cavity 7 through the through hole 8 (because the internal environment of the silencer cavity 7 is not connected to the external environment, the air pressure inside the guide pipe 5 is always the same as the air pressure inside the silencer cavity 7, so the airflow will not enter the silencer cavity 7, but will be directly discharged from the guide pipe 5 to the external environment). However, the sound waves that are dispersed in all directions can enter the silencer cavity 7 through the through hole 8. Generally, the sound waves are absorbed and reduced in the silencer cavity 7 by contacting the sound-absorbing material on the inner side wall of the silencer sleeve 6. Some of the sound waves are reflected towards the through hole 8 and cancel each other out with the sound waves that subsequently enter through the through hole 8. In this way, this device can significantly reduce noise at the air outlet position of the pipe 1 and improve the effectiveness of the device.

[0029] Furthermore, this device is equipped with multiple guide tubes 5, the purpose of which is to reduce the diameter of the guide tubes 5 so that the multiple guide tubes 5 can form a filter screen, which can effectively prevent larger debris or small animals from entering the pipe 1, thereby ensuring the function of the filter screen.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A goose neck ventilator with silencing device comprising a duct (1), characterized in that: The upper end of the pipe (1) is fixedly provided with a bend (2), and the lower end of the bend (2) is fixedly provided with a silencing mechanism. The silencing mechanism includes a silencing shell (3), a guide port (4), a guide pipe (5), a silencing sleeve (6), a silencing cavity (7), and a through hole (8). The lower end of the bend (2) is provided with a silencing shell (3). The silencing shell (3) is provided with a guide port (4) inside. Multiple guide ports (4) are provided and are evenly spaced inside the silencing shell (3). The lower end of the guide port (4) is fixedly provided with a guide pipe (5). The outer side of the guide pipe (5) is fitted with a silencing sleeve (6). A silencing cavity (7) is provided between the silencing sleeve (6) and the guide pipe (5). Several through holes (8) are evenly opened on the outer surface of the guide pipe (5).

2. A goose neck ventilator with a sound reduction device according to claim 1, characterized in that: The inner sidewall of the sound-absorbing sleeve (6) and the inner sidewall of the bend (2) are both provided with sound-absorbing material.

3. A goose neck ventilator with a sound reduction device according to claim 2, characterized in that: The guide port (4) is trumpet-shaped.

4. A goose neck ventilator with a sound reduction device according to claim 3, characterized in that: A rubber filler block (9) is provided in the gap between the plurality of the silencing sleeves (6).

5. A goose neck ventilator with sound attenuation device as claimed in claim 1 wherein: A connecting frame (10) is provided between the bend (2), the pipe (1), and the sound-absorbing shell (3). Fixing holes (11) are provided at the four corners of the outer surface of the connecting frame (10).

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