Variable cross-section muffler duct connecting device

Abstract

This utility model discloses a variable cross-section silencing duct connection device, including a first silencing duct, a second silencing duct connected to one end of the first silencing duct via a first connecting seat and a fixing bolt, a third silencing duct inserted into one end of the second silencing duct via a second connecting seat, and fixing support plates on both sides of the third silencing duct via connecting plates. The first silencing duct has first positioning seats on both sides that slide and engage with the fixing support plates, each with a first limiting hole. A locking mechanism for positioning the fixing support plates is also provided on the outside of the first silencing duct. This utility model utilizes the third silencing duct inserted into one end of the second silencing duct via a second connecting seat, allowing adjustment of the insertion depth of the third silencing duct into the second silencing duct to adjust the usable length of the silencing duct, facilitating the connection and use of ducts of different lengths.

Description

Technical Field

[0001] This utility model relates to the field of silencer duct technology, specifically a variable cross-section silencer duct connection device. Background Technology

[0002] Silencer ducts are specialized pipes designed to reduce airflow noise in ventilation systems. They are widely used in commercial buildings, industrial facilities, and residential areas where noise control is crucial. Through their unique design and materials, silencer ducts effectively reduce noise generated during airflow, improving environmental comfort. They are typically made of galvanized steel, stainless steel, or composite materials, offering corrosion resistance and high-temperature resistance. They are suitable for applications requiring noise reduction, such as air conditioning systems, ventilation systems, and industrial exhaust systems.

[0003] A noise-absorbing duct with application number 202323285155.8 in the prior art includes several metal sound-insulating outer skins, a mid-to-high frequency sound-absorbing layer disposed on the inner wall of the metal sound-insulating outer skins, and a connecting frame fixedly sleeved at both ends of the outer side of the metal sound-insulating outer skins. First, the metal sound-insulating outer skins block the sound outside the duct, preventing noise from outside the duct from entering the duct and forming superimposed noise. In conjunction with the mid-to-high frequency sound-absorbing layer and the low-frequency sound-absorbing device, the mid-to-high frequency sound-absorbing layer processes conventional mid-to-high frequency noise, while the hollow wedge design of the low-frequency sound-absorbing device blocks and absorbs low-frequency sound entering the low-frequency sound-absorbing device. On the basis of achieving mid-to-high frequency noise, the absorption of low-frequency noise is enhanced, resulting in better noise reduction effect. However, the connection structure between each section of the noise-absorbing duct is fixed, which makes it inconvenient to adjust the length of the noise-absorbing duct and makes it difficult to connect and use ducts of different lengths. Summary of the Invention

[0004] The purpose of this utility model is to provide a variable cross-section silencing duct connection device to solve the problem that the connection structure between different sections of silencing ducts is fixed in the prior art, which makes it inconvenient to adjust the length of the silencing duct and makes it difficult to connect and use silencing ducts of different lengths.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a variable cross-section silencing duct connection device, comprising a first silencing duct, a second silencing duct connected to one end of the first silencing duct via a first connecting seat and a fixing bolt, a third silencing duct inserted into one end of the second silencing duct via a second connecting seat, fixing support plates provided on both sides of the third silencing duct via connecting plates, first positioning seats provided on both sides of the first silencing duct that slide and engage with the fixing support plates, a first limiting hole provided inside the first positioning seat, and a locking mechanism for positioning the fixing support plates provided on the outside of the first silencing duct.

[0006] Furthermore, two first connecting seats are provided in parallel vertically, and a first sealing gasket is provided between the two first connecting seats.

[0007] Furthermore, the second connector has an insertion hole inside, and the inner wall of the insertion hole has a second sealing gasket.

[0008] Furthermore, the locking mechanism includes a second positioning seat disposed on both sides of the first silencing duct, a locking bracket inserted into the second positioning seat, a locking bracket having a locking screw threadedly connected to the middle of one end of the locking bracket to the locking screw outside the first silencing duct, a locking protrusion at one end of the locking bracket, and a locking groove on one side of the fixed support plate that engages with the locking protrusion.

[0009] Furthermore, the locking groove is configured as a semi-circular groove, and multiple locking grooves are provided at equal intervals, while the locking protrusion is configured as a semi-cylindrical protrusion.

[0010] Furthermore, one end of the locking screw is vertically rotatably mounted on the outer wall of the first silencer duct via a bearing seat and a bearing, and the second positioning seat is provided with a second limiting hole inside.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This utility model utilizes a second connector to insert a third silencing duct into one end of a second silencing duct. By adjusting the depth of the third silencing duct inserted into the second silencing duct, the length of the silencing duct can be adjusted, facilitating the connection and use of ducts of different lengths.

[0012] This utility model utilizes a third silencing duct with fixed support plates on both sides connected by connecting plates, and a first positioning seat on both sides of the first silencing duct that slides and engages with the fixed support plates. The first positioning seat has a first limiting hole inside, which facilitates the sliding insertion of the third silencing duct into the second silencing duct. The sliding connection has high stability and is convenient and quick to adjust.

[0013] This utility model utilizes a locking mechanism on the outside of the first silencing duct for positioning a fixed support plate. The locking mechanism includes a second positioning seat on both sides of the first silencing duct, and a locking bracket inserted into the second positioning seat. The middle of one end of the locking bracket is threadedly connected to a locking screw on the outside of the first silencing duct. One end of the locking bracket is provided with a locking protrusion, and one side of the fixed support plate is provided with a locking groove that engages with the locking protrusion. This allows the locking bracket to be adjusted laterally by rotating the locking screw. When the locking protrusion at one end of the locking bracket is inserted into the locking groove on one side of the fixed support plate, one end of the fixed support plate can be positioned, thereby facilitating the fixing of the third silencing duct. Attached Figure Description

[0014] 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: Figure 1 This is a schematic diagram of the overall first-view structure of this utility model; Figure 2 This is a schematic diagram of the overall second-view structure of this utility model; Figure 3 This is a schematic diagram of the locking bracket structure of this utility model.

[0015] In the diagram: 1. First silencer duct; 2. Fixing bolt; 3. First connecting seat; 4. Second silencer duct; 5. Third silencer duct; 6. Second connecting seat; 7. Insertion hole; 8. Connecting plate; 9. Fixing support plate; 10. First positioning seat; 11. Locking groove; 12. Bearing seat; 13. Locking bracket; 14. Locking screw; 15. Second positioning seat; 16. First limiting hole; 17. Second limiting hole; 18. Locking protrusion. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1 , Figure 2 , Figure 3 In this embodiment of the utility model, a variable cross-section silencing duct connection device includes a first silencing duct 1. One end of the first silencing duct 1 is connected to a second silencing duct 4 via a first connecting seat 3 and a fixing bolt 2. Two first connecting seats 3 are arranged parallel to each other vertically, and a first sealing gasket is provided between the two first connecting seats 3. A third silencing duct 5 is inserted into one end of the second silencing duct 4 via a second connecting seat 6. The second connecting seat 6 has an insertion hole 7 inside, and a second sealing gasket is provided on the inner wall of the insertion hole 7. This allows the length of the silencing duct to be adjusted by adjusting the depth of the third silencing duct 5 inserted into the second silencing duct 4, facilitating the connection and use of silencing ducts of different lengths. The adjustment is convenient and quick.

[0018] like Figure 1 and Figure 2As shown, in order to slide the third silencer duct 5 into the second silencer duct 4, fixed support plates 9 are provided on both sides of the third silencer duct 5 through connecting plates 8. The first silencer duct 1 is provided on both sides with first positioning seats 10 that slide into the fixed support plates 9. The first positioning seats 10 are provided with first limiting holes 16 inside, which facilitates the sliding insertion of the third silencer duct 5 into the second silencer duct 4. The sliding connection has high stability and is convenient and quick to adjust.

[0019] like Figure 1 and Figure 3 As shown, a locking mechanism for positioning the fixed support plate 9 is also provided on the outside of the first silencing duct 1. The locking mechanism includes a second positioning seat 15 on both sides of the first silencing duct 1. A locking bracket 13 is inserted into the second positioning seat 15. The middle of one end of the locking bracket 13 is threadedly connected to the locking screw 14 on the outside of the first silencing duct 1. One end of the locking bracket 13 is provided with a locking protrusion 18. One side of the fixed support plate 9 is provided with a locking groove 11 that engages with the locking protrusion 18. The locking groove 11 is set as a semi-circular groove, and multiple locking grooves are evenly spaced. The locking protrusion 18 is set as a semi-cylindrical protrusion, so that the locking bracket 13 can be adjusted laterally by rotating the locking screw 14. When the locking protrusion 18 at one end of the locking bracket 13 is inserted into the locking groove 11 on one side of the fixed support plate 9, one end of the fixed support plate 9 can be positioned, thereby facilitating the fixing of the third silencing duct 5.

[0020] like Figure 1 and Figure 2 As shown, one end of the locking screw 14 is vertically rotated on the outer wall of the first silencer duct 1 through the bearing seat 12 and the bearing. The second positioning seat 15 is provided with a second limiting hole 17, which facilitates the sliding insertion of one end of the locking bracket 13 into the second positioning seat 15.

[0021] The working principle and usage process of this utility model are as follows: In use, a third silencer duct 5 is inserted into one end of the second silencer duct 4 through the second connecting seat 6. By adjusting the depth of the third silencer duct 5 inserted into the second silencer duct 4, the length of the silencer duct can be adjusted, which facilitates the connection and use of silencer ducts of different lengths. The adjustment is convenient and quick.

[0022] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A variable cross-section muffling duct connection device comprising a first muffling duct (1), characterized in that: One end of the first silencing duct (1) is connected to the second silencing duct (4) through the first connecting seat (3) and the fixing bolt (2). The second silencing duct (4) is connected to the third silencing duct (5) through the second connecting seat (6) at one end. The third silencing duct (5) is provided with fixing support plates (9) on both sides through the connecting plate (8). The first silencing duct (1) is provided with the first positioning seat (10) on both sides that slides and engages with the fixing support plate (9). The first silencing duct (1) is also provided with a locking mechanism for positioning the fixing support plate (9) on the outside.

2. The variable cross-section silencer duct connection device according to claim 1, characterized in that: Two first connecting seats (3) are provided in parallel vertically, and a first sealing gasket is provided between the two first connecting seats (3).

3. The variable cross-section silencer duct connection device according to claim 1, characterized in that: The second connector (6) has a plug hole (7) inside, and the inner wall of the plug hole (7) is provided with a second sealing gasket.

4. A variable cross-section sound attenuation duct connection device according to claim 1, characterized in that: The locking mechanism includes a second positioning seat (15) disposed on both sides of the first silencing duct (1). A locking bracket (13) is inserted into the second positioning seat (15). The middle part of one end of the locking bracket (13) is threadedly connected to the locking screw (14) outside the first silencing duct (1). One end of the locking bracket (13) is provided with a locking protrusion (18). One side of the fixed support plate (9) is provided with a locking groove (11) that engages with the locking protrusion (18).

5. A variable cross-section sound attenuation duct connection device according to claim 4, wherein: The locking groove (11) is set as a semi-circular groove, and multiple locking grooves (11) are provided at equal intervals. The locking protrusion (18) is set as a semi-cylindrical protrusion.

6. The variable cross-section silencer duct connection device according to claim 4, characterized in that: One end of the locking screw (14) is vertically rotated through the bearing seat (12) and the bearing on the outer wall of the first silencer duct (1), and the second positioning seat (15) is provided with a second limiting hole (17).

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