Silencer exhaust hood

Abstract

The utility model relates to the technical field of exhaust hood, concretely is a kind of sound-absorbing exhaust hood, solve the problem proposed in background art, it includes shell, airflow channel and sound-absorbing layer, the sound-absorbing layer is composed of at least two independent sound-absorbing modules, each module is pullably installed in shell by slide rail mechanism, each sound-absorbing module includes metal frame, sound-absorbing cotton layer filled in frame and perforated facing airflow measurement panel, the joint of sound-absorbing module and shell is equipped with sealing assembly.The utility model, by modularization slide rail type sound-absorbing layer design, sound-absorbing assembly can be quickly pulled to replace and maintain, improve the convenience of overhaul;Multiple sealing structure (U-shaped silica gel strip+staged flange+EPDM rubber strip) is effectively prevented airflow leakage, ensure that the stable noise reduction performance.

Description

Technical Field

[0001] This utility model relates to the field of exhaust hood technology, specifically a noise-absorbing exhaust hood. Background Technology

[0002] In industrial plants, laboratories, kitchens, and other similar locations, exhaust systems often generate significant noise while discharging waste gases, impacting the working environment and the health of personnel. To reduce noise, silencer exhaust hoods are typically used, which usually contain sound-absorbing materials (such as sound-absorbing cotton) to absorb sound wave energy.

[0003] Existing sound-absorbing hoods typically have fixed sound-absorbing layers. Once the sound-absorbing cotton ages or becomes clogged, replacement requires complete disassembly, which is time-consuming and labor-intensive. Airflow may leak from the joints of the sound-absorbing layer, leading to a decrease in sound absorption and even affecting exhaust efficiency. Some detachable designs rely on bolts or fasteners, which are inconvenient to disassemble and increase maintenance costs. Utility Model Content

[0004] To solve the above problems, this utility model provides the following technical solution: a sound-absorbing exhaust hood, including an outer shell, an airflow channel and a sound-absorbing layer. The sound-absorbing layer is composed of at least two independent sound-absorbing modules. Each module is removably installed inside the outer shell via a sliding rail mechanism. Each sound-absorbing module includes a metal frame, a sound-absorbing cotton layer filled in the frame and a perforated protective panel facing the airflow side. A sealing component is provided at the joint between the sound-absorbing module and the outer shell.

[0005] Preferably, the slide rail mechanism includes a guide groove fixed to the inner side of the housing and a ball slide rail installed at the bottom of the sound-absorbing module, with a limiting block at the end of the slide rail.

[0006] Preferably, the sealing assembly includes a U-shaped silicone sealing strip embedded in the edge of the metal frame, and a stepped sealing flange and EPDM adhesive strip at the joint of adjacent modules.

[0007] Preferably, the outer shell is detachably snapped to both sides of the outer shell, and the two ends of the perforated protective panel are provided with a plurality of first snap-fit ​​grooves distributed in a ring along the axis. The two ends of the outer shell are correspondingly provided with second snap-fit ​​grooves. The inner side of the end shell is provided with an elastic buckle, and the elastic buckle is adapted to the first snap-fit ​​groove and the second snap-fit ​​groove to form a snap-fit ​​engagement.

[0008] Preferably, the stepped sealing flange has a tooth height of 5-10 mm, a tooth spacing of 8-15 mm, and a tooth shape of sawtooth or wavy.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] The modular sliding sound-absorbing layer design allows for quick and easy replacement and maintenance of the sound-absorbing components, improving maintenance convenience. A multi-layered sealing structure (U-shaped silicone strip + stepped flange + EPDM adhesive strip) effectively prevents airflow leakage, ensuring stable noise reduction performance. The detachable end shell and elastic buckle design simplify the assembly and disassembly process, while the serrated sealing flange further enhances the sealing performance. The overall structure ensures efficient noise reduction while also considering ease of construction and long-term airtight reliability. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model;

[0013] Figure 2 This is a side view of the sound-absorbing module of this utility model.

[0014] Figure 3 This is a schematic cross-sectional view of the outer shell of this utility model;

[0015] Figure 4 This is a schematic diagram of the end shell structure of this utility model.

[0016] In the diagram: 1. Outer shell; 2. Airflow channel; 3. Sound-absorbing module; 31. Metal frame; 32. Sound-absorbing cotton layer; 33. Perforated protective panel; 4. Slide rail mechanism; 41. Guide groove; 42. Ball bearing slide rail; 43. Limiting block; 5. Sealing component; 51. U-shaped silicone sealing strip; 52. Stepped sealing flange; 53. EPDM adhesive strip; 6. End shell; 7. First snap-fit ​​groove; 8. Second snap-fit ​​groove; 9. Elastic buckle. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1-4As shown, the silencer exhaust hood of this embodiment includes an outer shell 1, an airflow channel 2 and a sound-absorbing layer. The sound-absorbing layer is composed of at least two independent sound-absorbing modules 3. Each module is removably installed in the outer shell 1 via a slide rail mechanism 4. Each sound-absorbing module 3 includes a metal frame 31, a sound-absorbing cotton layer 32 filled in the frame, and a perforated protective panel 33 facing the airflow side. A sealing component 5 is provided at the joint between the sound-absorbing module 3 and the outer shell 1.

[0019] The slide rail mechanism 4 includes a guide groove 41 fixed to the inside of the housing 1 and a ball slide rail 42 installed at the bottom of the sound-absorbing module 3. A limit stop 43 is provided at the end of the slide rail.

[0020] The sealing assembly 5 includes a U-shaped silicone sealing strip 51 embedded in the edge of the metal frame 31, and a stepped sealing flange 52 and an EPDM strip 53 at the joint of adjacent modules.

[0021] The two sides of the outer shell 1 are detachably snapped with end shells 6. The two ends of the perforated protective panel 33 are provided with a plurality of first snap-fit ​​grooves 7 arranged in a ring along the axis. The two ends of the outer shell 1 are respectively provided with second snap-fit ​​grooves 8. The inner side of the end shell 6 is provided with an elastic buckle 9. The elastic buckle 9 is adapted to the first snap-fit ​​grooves 7 and the second snap-fit ​​grooves 8 to form a snap-fit ​​engagement.

[0022] The stepped sealing flange 52 has a tooth height of 5-10 mm, a tooth spacing of 8-15 mm, and a tooth shape of sawtooth or wavy.

[0023] The working principle of this utility model is as follows:

[0024] When airflow passes through the airflow channel 2 of the outer shell 1, the sound wave energy is absorbed by the sound-absorbing cotton layer 32 in the sound-absorbing module 3. The perforated protective panel 33 protects the sound-absorbing cotton while allowing airflow to pass through. The modular sound-absorbing layer design allows each sound-absorbing module 3 to be independently pulled out along the slide rail mechanism 4, which is convenient for maintenance and replacement. The sealing components 5 (U-shaped silicone sealing strip 51, stepped sealing flange 52 and EPDM rubber strip 53) effectively prevent airflow leakage and ensure the sound absorption effect. The end shell 6 can be quickly disassembled and assembled through the cooperation of the elastic buckle 9 and the snap-fit ​​groove (7, 8), which is convenient for internal inspection. The overall structure ensures efficient sound absorption while taking into account the convenience of maintenance and the reliability of long-term use.

[0025] 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.

[0026] 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 silencer exhaust hood, comprising a shell (1), an airflow channel (2), and a sound-absorbing layer, characterized in that, The sound-absorbing layer consists of at least two independent sound-absorbing modules (3). Each module is removably installed in the outer shell (1) via a slide rail mechanism (4). Each sound-absorbing module (3) includes a metal frame (31), a sound-absorbing cotton layer (32) filled in the frame, and a perforated protective panel (33) facing the airflow. A sealing component (5) is provided at the joint between the sound-absorbing module (3) and the outer shell (1).

2. The silencer exhaust hood according to claim 1, characterized in that: The slide rail mechanism (4) includes a guide groove (41) fixed to the inside of the outer shell (1) and a ball slide rail (42) installed at the bottom of the sound-absorbing module (3). The end of the slide rail is provided with a limiting block (43).

3. The silencer exhaust hood according to claim 1, characterized in that: The sealing assembly (5) includes a U-shaped silicone sealing strip (51) embedded in the edge of the metal frame (31), and a stepped sealing flange (52) and an EPDM strip (53) at the splicing of adjacent modules.

4. The silencer exhaust hood according to claim 1, characterized in that: The outer shell (1) is detachably snapped with end shells (6) on both sides. The perforated protective panel (33) has multiple first snap-fit ​​grooves (7) arranged in a ring around the axis at both ends. The outer shell (1) has corresponding second snap-fit ​​grooves (8) at both ends. The inner side of the end shell (6) is provided with an elastic buckle (9). The elastic buckle (9) is adapted to the first snap-fit ​​groove (7) and the second snap-fit ​​groove (8) to form a snap-fit ​​engagement.

5. The silencer exhaust hood according to claim 3, characterized in that: The stepped sealing flange (52) has a tooth height of 5-10 mm, a tooth spacing of 8-15 mm, and a tooth shape of sawtooth or wavy.

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