Elbow silencer

Abstract

The utility model discloses an elbow silencer, which relates to the technical field of elbow silencers and comprises an elbow, an air inlet connector and an air outlet connector are respectively arranged at two ends of the elbow, a silencing partition plate is arranged in the elbow, one end of the silencing partition plate extends to the middle section of the inner side of the air inlet connector, and the other end of the silencing partition plate extends to the middle section of the inner side of the air outlet connector. An adjustable flow guide structure is arranged in the middle of the silencing partition plate, a plurality of positioning protruding blocks connected with the adjustable flow guide structure in a positioning mode are arranged on the inner wall of the middle of the bent pipe at intervals, and during use, the flow guide structure of the silencing partition plate can be directly adjusted according to the size of airflow input into the bent pipe; the adjusting rope drives the elastic plate to deform, the length of a sound wave reflection path is changed, then the hanging ring on the adjusting rope is hooked to the positioning protruding block at the position, the form of the elastic plate is limited, and operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of elbow muffler technology, and more specifically to an elbow muffler. Background Technology

[0002] Elbow silencers are professional noise reduction devices that combine silencing function with duct reversal. They are mainly used in ventilation or air conditioning systems to eliminate low-to-medium frequency noise generated by fans, while also changing the airflow direction.

[0003] To improve noise reduction performance, existing elbow silencers have an integrated baffle inside. The baffle width and guide surface need to be selected according to the input airflow; otherwise, the problem of narrow frequency band coverage may occur. Utility Model Content

[0004] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description and other accompanying drawings.

[0005] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a bend silencer.

[0006] To achieve the above objectives, the technical solution of this utility model is: a bend silencer, comprising: a bend pipe, with an air inlet connector and an air outlet connector respectively provided at both ends of the bend pipe, and a sound-absorbing baffle plate provided inside the bend pipe, with one end of the sound-absorbing baffle plate extending to the middle section of the inner side of the air inlet connector and the other end extending to the middle section of the inner side of the air outlet connector, an adjustable flow guiding structure provided in the middle section of the sound-absorbing baffle plate, and a plurality of positioning protrusions that are connected and positioned to the adjustable flow guiding structure are provided at intervals on the inner wall of the middle part of the bend pipe.

[0007] Preferably, for ease of adjustment, the adjustable flow guiding structure includes a positioning port that runs through the middle section of the sound-absorbing baffle, two elastic plates that cover the upper and lower openings of the positioning port respectively, an adjustment rope is provided at the end of the elastic plate away from the positioning port, and a hanging ring that hooks onto the positioning protrusion is provided at the end of the adjustment rope away from the elastic plate.

[0008] Preferably, to improve the strength of the connection, the elastic plate and the sound-absorbing partition are connected by either adhesive or bolting.

[0009] Preferably, the positioning protrusion has a T-shaped cross-section for hooking and positioning.

[0010] As a preferred option, in order to improve the airflow guiding effect, the sound-absorbing baffle has an arc-shaped structure with both ends being conical.

[0011] As a preferred option, to improve the stability of the connection, the bend is integrated with the air inlet and outlet connectors.

[0012] As a preferred option, in order to improve noise reduction performance, the elastic board is specifically one of the following: elastic sound-absorbing board and sound-absorbing foam.

[0013] As a preferred embodiment, in order to strengthen the connection between the elastic plate and the adjusting rope, a metal liner plate that is fixed to the adjusting rope bolts is pre-embedded in the interlayer of the elastic plate.

[0014] The beneficial effects of this utility model are as follows: When in use, the flow guiding structure of the sound-absorbing baffle can be directly adjusted according to the size of the airflow input into the bend. By operating the adjustable flow guiding structure and pulling the adjusting rope, the adjusting rope causes the elastic plate to deform, changing the length of the sound wave reflection path. Then, the hook on the adjusting rope is hooked onto the positioning protrusion at that position to restrict the shape of the elastic plate, making the operation convenient. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an elbow silencer according to the present invention;

[0016] Figure 2 This is a cross-sectional structural diagram of an elbow silencer according to the present invention;

[0017] Figure 3 for Figure 2 A schematic diagram of the adjustment mechanism;

[0018] Figure 4 This is a schematic diagram of the connection structure between the adjusting rope and the positioning protrusion.

[0019] Attached reference numerals: bend-1, air inlet connector-11, air outlet connector-12, sound-absorbing baffle-13, positioning protrusion-14, positioning port-131, elastic plate-132, adjusting rope-133, hanging ring-134. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] Please see Figure 1-4 This utility model provides a bend silencer, including: a bend 1, with an air inlet connector 11 and an air outlet connector 12 respectively at both ends of the bend 1, and a sound-absorbing baffle 13 is provided inside the bend 1. One end of the sound-absorbing baffle 13 extends to the middle section of the inner side of the air inlet connector 11, and the other end extends to the middle section of the inner side of the air outlet connector 12. An adjustable flow guide structure is provided in the middle section of the sound-absorbing baffle 13, and a plurality of positioning protrusions 14 connected and positioned to the adjustable flow guide structure are provided at intervals on the inner wall of the middle part of the bend 1.

[0023] According to some embodiments of this application, optionally, for ease of adjustment, the adjustable flow guiding structure includes a positioning port 131 penetrating the middle section of the sound-absorbing baffle 13, and two elastic plates 132 covering the upper and lower openings of the positioning port 131 respectively. An adjustment rope 133 is provided at the end of the elastic plate 132 away from the positioning port 131, and a hanging ring 134 hooked to the positioning protrusion 14 is provided at the end of the adjustment rope 133 away from the elastic plate 132.

[0024] When in use, the flow guiding structure of the sound-absorbing baffle 13 can be adjusted directly according to the airflow input into the bend 1. By operating the adjustable flow guiding structure, the adjusting rope 133 is pulled, causing the adjusting rope 133 to drive the elastic plate 132 to deform, changing the length of the sound wave reflection path. Then, the hanging ring 134 on the adjusting rope 133 is hooked onto the positioning protrusion 14 at that position to restrict the shape of the elastic plate 132, making the operation convenient.

[0025] According to some embodiments of this application, optionally, in order to improve the strength of the connection, the elastic plate 132 and the partition plate 13 are connected by one of adhesive or bolt fixing, preferably adhesive, so that the elastic plate 132 and the partition plate 13 are connected.

[0026] According to some embodiments of this application, optionally, for hook positioning, the positioning protrusion 14 has a T-shaped cross-section.

[0027] According to some embodiments of this application, optionally, in order to improve the flow guiding effect, the sound-absorbing baffle 13 has an arc-shaped structure and both ends are conical.

[0028] According to some embodiments of this application, optionally, in order to improve the stability of the connection, the bend 1, the air inlet connector 11, and the air outlet connector 12 are integrated into one structure.

[0029] According to some embodiments of this application, optionally, in order to improve noise reduction performance, the elastic plate 132 is specifically one of an elastic sound-absorbing plate and sound-absorbing foam, preferably an elastic sound-absorbing plate.

[0030] According to some embodiments of this application, optionally, in order to strengthen the connection between the elastic plate 132 and the adjusting rope 133, a metal liner plate that is bolted to the adjusting rope 133 is pre-embedded in the interlayer of the elastic plate 132.

[0031] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0032] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the present invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0033] Furthermore, the described features or characteristics may be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented without the aforementioned one or more specific details or may be implemented using other methods, components, materials, etc.

Claims

1. A bend-type silencer, characterized in that, include: The bend (1) has an air inlet connector (11) and an air outlet connector (12) at both ends. A sound-absorbing baffle (13) is installed inside the bend (1). One end of the sound-absorbing baffle (13) extends to the middle section inside the air inlet connector (11), and the other end extends to the middle section inside the air outlet connector (12). An adjustable flow guide structure is installed in the middle section of the sound-absorbing baffle (13). Several positioning protrusions (14) that are connected and positioned to the adjustable flow guide structure are provided at intervals on the inner wall of the middle part of the bend (1).

2. The elbow silencer according to claim 1, characterized in that, The adjustable flow guiding structure includes a positioning port (131) that runs through the middle section of the sound-absorbing baffle (13), and two elastic plates (132) that cover the upper and lower openings of the positioning port (131). An adjustment rope (133) is provided at the end of the elastic plate (132) away from the positioning port (131), and a hanging ring (134) that is hooked to the positioning protrusion (14) at the end of the adjustment rope (133) away from the elastic plate (132).

3. A bend silencer according to claim 2, characterized in that, The elastic plate (132) and the sound-absorbing partition (13) are connected by one of the following methods: adhesive or bolt fixing.

4. A bend silencer according to claim 2, characterized in that, The positioning bump (14) has a T-shaped cross-section.

5. A bend silencer according to claim 2, characterized in that, The sound-absorbing baffle (13) has an arc-shaped structure and both ends are conical.

6. A bend silencer according to claim 1, characterized in that, The bend (1) is integrated with the air inlet connector (11) and the air outlet connector (12).

7. A bend silencer according to claim 2, characterized in that, The elastic board (132) is specifically one of the elastic sound-absorbing board and sound-absorbing foam.

8. A bend silencer according to claim 7, characterized in that, A metal liner plate is pre-embedded in the interlayer of the elastic plate (132) and fixed to the bolt of the adjusting rope (133).

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