Ventilation duct vibration damping noise reduction mechanism

Abstract

The utility model relates to the technical field of ventilation pipeline, and disclose a ventilation pipeline vibration damping noise reduction mechanism, including first pipe, the top of first pipe is provided with second pipe, the outside of first pipe and second pipe is provided with damping layer, the outside of damping layer is provided with anti -vibration layer, the inside of first pipe and second pipe is provided with sound -absorbing layer, the inside of sound -absorbing layer is provided with sound insulation layer, the material of damping layer is pitch base damping material, the material of anti -vibration layer is natural rubber. The ventilation pipeline vibration damping noise reduction mechanism, through the setting of damping layer, anti -vibration layer, sound -absorbing layer and sound insulation layer, can increase the buffer function to first pipe and second pipe through damping layer, through the setting of anti -vibration layer, can prevent the vibration noise of the surface of first pipe and second pipe through anti -vibration layer, through the setting of sound -absorbing layer and sound insulation layer, can reduce the noise inside first pipe and second pipe.

Description

Technical Field

[0001] This utility model relates to the field of ventilation duct technology, and in particular to a vibration damping and noise reduction mechanism for ventilation ducts. Background Technology

[0002] In the HVAC industry, ventilation ducts typically refer to a complete system consisting of pipes, fittings, components, and auxiliary structures used to transport and distribute air and control its flow rate, pressure, and contaminant concentration.

[0003] Chinese patent CN214791815U discloses a ventilation duct that is easy to install. This utility model relates to the field of ventilation duct technology. The insert is movably inserted into the slot. A No. 1 connecting slide frame is fixed on the right end of the inner cavity peripheral wall of the No. 1 ventilation duct, and a No. 2 connecting slide frame is fixed on the left end of the inner cavity peripheral wall of the No. 2 ventilation duct. The slide plate is slidably set in the No. 1 and No. 2 connecting slide frames. After the pusher passes through the strip-shaped through hole opened on the No. 2 ventilation duct, it is fixed with the slide plate. A cover is screwed on the No. 2 ventilation duct outside the strip-shaped through hole using a hinge. A connecting plate is fixed on the right end of the outer wall of the No. 1 ventilation duct and the left end of the outer wall of the No. 2 ventilation duct. The corresponding left and right connecting plates are fixed with locking bolts. A clamp is set on the peripheral wall of the No. 1 and No. 2 ventilation ducts, and a fixing frame is fixed on the clamp. The design is reasonable, and it can be assembled and connected first and then riveted and fixed. The overall structure has good sealing performance.

[0004] Regarding the above and existing related technologies, the inventors believe that the following defects often exist: existing ventilation ducts are mostly made of metal sheets and do not have noise reduction function. When running, the vibration of the fan and the turbulence of the airflow will cause resonance of the duct wall, producing a significant "humming" sound and air noise, which seriously affects the acoustic comfort of the space and the user experience. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantage that ventilation ducts do not have noise reduction. To this end, we propose a vibration damping noise reduction mechanism for ventilation ducts.

[0006] To achieve the above objectives, this application adopts the following technical solution: a vibration damping and noise reduction mechanism for ventilation ducts, comprising a first pipe, a second pipe disposed at the top of the first pipe, a damping layer disposed on the outer side of the first pipe and the second pipe, a vibration damping layer disposed on the outer side of the damping layer, a sound-absorbing layer disposed on the inner side of the first pipe and the second pipe, and a sound insulation layer disposed on the inner side of the sound-absorbing layer.

[0007] Preferably, the damping layer is made of asphalt-based damping material, and the vibration damping layer is made of natural rubber.

[0008] Preferably, the sound-absorbing layer is made of inorganic fiber, and the sound-insulating layer is made of elastic vibration damping pad.

[0009] Preferably, a first mounting block is installed on the top of the surface of the first tube, and a second mounting block is installed on the bottom of the surface of the second tube.

[0010] Preferably, the first mounting block and the second mounting block are fixedly connected to the outer sides with mounting ears, and the mounting ears are internally threaded with positioning bolts.

[0011] Preferably, the inner sides of the first mounting block and the second mounting block are provided with receiving grooves, and a sealing plate is installed inside the receiving grooves.

[0012] Preferably, a connecting block is fixedly connected to the bottom of the first pipe and the top of the second pipe, and the connecting block is used for quick connection between the pipe and the first pipe and the second pipe.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] In this invention, by setting up a damping layer, a vibration damping layer, a sound absorbing layer, and a sound insulation layer, the damping layer can increase the buffering function of the first tube and the second tube, the vibration damping layer can prevent vibration noise from appearing on the surface of the first tube and the second tube, and the sound absorbing layer and the sound insulation layer can reduce the noise inside the first tube and the second tube.

[0015] In this invention, asphalt-based damping material is used to add elasticity to the outer sides of the first and second pipes to prevent metal materials from impacting the surfaces of the first and second pipes and generating vibration noise. Natural rubber material is used to eliminate the vibration generated by the first and second pipes. Attached Figure Description

[0016] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the first tube structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the first mounting block and the second mounting block of this utility model;

[0020] Figure 4 For the present utility model Figure 2 Enlarged diagram of point A in the middle.

[0021] Legend: 1. First pipe; 2. Second pipe; 3. Damping layer; 4. Vibration damping layer; 5. Sound absorbing layer; 6. Sound insulation layer; 7. First mounting block; 8. Second mounting block; 9. Mounting ear; 10. Positioning bolt; 11. Receiving groove; 12. Sealing plate; 13. Connecting block. Detailed Implementation

[0022] Based on the technical solution of this utility model, without changing the essential spirit of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0023] Reference Figures 1-4 As shown, this utility model provides a technical solution: a vibration damping and noise reduction mechanism for ventilation ducts, including a first pipe 1, a second pipe 2 disposed at the top of the first pipe 1, a damping layer 3 disposed on the outer side of the first pipe 1 and the second pipe 2, a vibration damping layer 4 disposed on the outer side of the damping layer 3, a sound-absorbing layer 5 disposed on the inner side of the first pipe 1 and the second pipe 2, and a sound insulation layer 6 disposed on the inner side of the sound-absorbing layer 5.

[0024] Specifically: by setting up the damping layer 3, the vibration damping layer 4, the sound absorbing layer 5 and the sound insulation layer 6, the damping layer 3 can increase the buffering function of the first tube 1 and the second tube 2, the vibration damping layer 4 can prevent vibration noise from appearing on the surface of the first tube 1 and the second tube 2, and the sound absorbing layer 5 and the sound insulation layer 6 can reduce the noise inside the first tube 1 and the second tube 2.

[0025] Reference Figure 4 As shown, in this embodiment: the damping layer 3 is made of asphalt-based damping material, and the vibration damping layer 4 is made of natural rubber.

[0026] Specifically: by using asphalt-based damping material to increase elasticity on the outside of the first pipe 1 and the second pipe 2, vibration noise is prevented from the metal material impacting the surface of the first pipe 1 and the second pipe 2; and by using natural rubber material to eliminate the vibration generated by the first pipe 1 and the second pipe 2.

[0027] Reference Figure 4 As shown in this embodiment: the sound-absorbing layer 5 is made of inorganic fiber, and the sound-insulating layer 6 is made of elastic vibration damping pad.

[0028] Specifically: Inorganic fiber materials are used to reduce noise generated inside the first tube 1 and the second tube 2, and elastic vibration damping pads are used to prevent sharp metal objects from hitting the inner walls of the first tube 1 and the second tube 2 and causing noise.

[0029] Reference Figure 1As shown, in this embodiment: a first mounting block 7 is installed on the top of the surface of the first pipe 1, and a second mounting block 8 is installed on the bottom of the surface of the second pipe 2.

[0030] Specifically: By setting the first mounting block 7 and the second mounting block 8, the first tube 1 and the second tube 2 can be installed together in conjunction with the mounting ear 9 and the positioning bolt 10.

[0031] Reference Figure 3 As shown in this embodiment: the first mounting block 7 and the second mounting block 8 are fixedly connected to the outer side of the mounting ear 9, and the mounting ear 9 is internally threaded with a positioning bolt 10.

[0032] Specifically: By installing the ear 9 and the positioning bolt 10, the first tube 1 and the second tube 2 can be installed together by using the positioning bolt 10.

[0033] Reference Figure 3 As shown in this embodiment: the inner sides of the first mounting block 7 and the second mounting block 8 are provided with receiving grooves 11, and a sealing plate 12 is installed inside the receiving grooves 11.

[0034] Specifically: By setting up the receiving groove 11 and the sealing plate 12, the sealing plate 12 can be received by the receiving groove 11, and the sealing plate 12 can prevent the noise inside the first pipe 1 and the second pipe 2 from being transmitted to the outside.

[0035] Reference Figure 1 As shown in this embodiment: the bottom of the first pipe 1 and the top of the second pipe 2 are fixedly connected to a connecting block 13, which is used for quick connection between the pipe and the first pipe 1 and the second pipe 2.

[0036] Specifically: By setting the docking block 13, the connection speed between the first pipe 1 and the second pipe 2 and other pipes can be increased.

[0037] Working principle: Asphalt-based damping material is applied to the outside of the first pipe 1 and the second pipe 2 to form an elastic constraint layer, which effectively suppresses the resonance noise generated by the airflow vibration of the metal pipe wall. At the same time, natural rubber material is filled between the two pipes to consume the vibration energy transmitted by the structure by utilizing its high internal friction characteristics. The inner wall of the pipe is lined with inorganic fiber material, and the aerodynamic noise is reduced by the porous sound absorption structure. In addition, elastic vibration damping pads are set at the pipe connection to buffer possible impacts from foreign objects inside and prevent impact noise. Finally, the two pipes are joined and fixed by installing ear 9 and positioning bolt 10, so as to achieve modular and rapid installation while ensuring structural stability.

[0038] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A vibration damping and noise reduction mechanism for a ventilation duct, comprising a first pipe (1), wherein a second pipe (2) is disposed at the top of the first pipe (1), characterized in that: A damping layer (3) is provided on the outer side of the first tube (1) and the second tube (2), and a vibration damping layer (4) is provided on the outer side of the damping layer (3). A sound-absorbing layer (5) is provided on the inner side of the first tube (1) and the second tube (2), and a sound-insulating layer (6) is provided on the inner side of the sound-absorbing layer (5).

2. The vibration damping and noise reduction mechanism for ventilation ducts according to claim 1, characterized in that: The damping layer (3) is made of asphalt-based damping material, and the vibration damping layer (4) is made of natural rubber.

3. The vibration damping and noise reduction mechanism for ventilation ducts according to claim 1, characterized in that: The sound-absorbing layer (5) is made of inorganic fiber, and the sound-insulating layer (6) is made of elastic vibration damping pad.

4. The vibration damping and noise reduction mechanism for ventilation ducts according to claim 1, characterized in that: A first mounting block (7) is installed on the top of the surface of the first tube (1), and a second mounting block (8) is installed on the bottom of the surface of the second tube (2).

5. The vibration damping and noise reduction mechanism for a ventilation duct according to claim 4, characterized in that: The first mounting block (7) and the second mounting block (8) are fixedly connected to the outer side of the mounting ear (9), and the mounting ear (9) is internally threaded with a positioning bolt (10).

6. The vibration damping and noise reduction mechanism for a ventilation duct according to claim 5, characterized in that: The first mounting block (7) and the second mounting block (8) have a receiving groove (11) on their inner sides, and a sealing plate (12) is installed inside the receiving groove (11).

7. The vibration damping and noise reduction mechanism for a ventilation duct according to claim 1, characterized in that: A connecting block (13) is fixedly connected to the bottom of the first pipe (1) and the top of the second pipe (2). The connecting block (13) is used for quick connection between the pipe and the first pipe (1) and the second pipe (2).

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