Noise reduction equipment for warm ventilation pipe

Abstract

The utility model discloses noise reduction equipment for a warm ventilation pipe, which comprises a noise reduction outer protection pipe, the noise reduction outer protection pipe is wrapped and sleeved on the outer circumference of a warm ventilation pipe body, two opposite ends of the warm ventilation pipe body are respectively provided with a flange plate, the number of the flange plates is two, and a plurality of concentrated air deflectors are arranged inside the warm ventilation pipe body. The inner surface of the warm ventilation pipe body is covered with an inner noise reduction layer, the flange plate is connected with the butt joint flange through bolts, a connecting mechanism is arranged between the flange plate and the butt joint flange, and the noise reduction outer protection pipe comprises a heat preservation noise reduction layer, a sound insulation interlayer and a heat insulation noise reduction layer. By arranging a series of structures, multi-layer heat preservation, heat insulation, sound insulation and noise reduction are achieved, noise diffusion of the warm ventilation pipe is greatly reduced, the structural strength of the noise reduction outer protection pipe is enhanced, airflow is intensively guided, noise generated by airflow circulation and pipe wall impact is reduced, and the service life of the warm ventilation pipe is prolonged. The sealing performance and the stability between the flange plate on the warm ventilation pipe and the butt joint flange are enhanced, and noise caused by assembly leakage of the warm ventilation pipe is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction of heating and ventilation ducts, in particular to a noise reduction device for heating and ventilation ducts. Background Art

[0002] HVAC ductwork is a piping system used for air transportation and distribution, widely used in air conditioning, ventilation, and industrial exhaust systems. Its primary functions include air supply, smoke exhaust, and dust removal. HVAC duct noise reduction involves using a range of technologies and equipment to reduce the noise generated by ductwork in HVAC systems, ensuring proper system operation while minimizing impact on the environment and personnel.

[0003] Although noise can be reduced by wrapping noise reduction cotton on the outside of the heating and ventilation duct, the sound insulation and noise reduction effect of a single noise reduction cotton is poor. The noise reduction cotton needs to be of sufficient thickness, and the noise reduction cotton can only block the transmission of noise, but cannot reduce the noise generated by the air flow inside the heating and ventilation duct. In addition, the heating and ventilation duct leaks at the connection and assembly points, which has poor practicality. Utility Model Content

[0004] The purpose of the present invention is to provide a noise reduction device for heating and ventilation ducts to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a noise reduction device for a heating and ventilation duct, comprising a noise reduction outer protective pipe, the noise reduction outer protective pipe being wrapped and sleeved on the outer circumference of the heating and ventilation duct body, flanges being provided at opposite ends of the heating and ventilation duct body, two flanges being provided, a plurality of centralized air guide plates being provided inside the heating and ventilation duct body, the inner surface of the heating and ventilation duct body being covered with an inner noise reduction layer, the flange being connected to the docking flange by bolts, a connecting mechanism being provided between the flange and the docking flange, the noise reduction outer protective pipe comprising a thermal insulation and noise reduction layer, a sound insulation interlayer and a heat insulation and noise reduction layer, the outer circumference of the heating and ventilation duct body between the two flanges being wrapped with a thermal insulation and noise reduction layer, the outer side of the thermal insulation and noise reduction layer being sleeved with a thermal insulation and noise reduction layer, a sound insulation interlayer being formed between the heat insulation and noise reduction layer and a sound insulation mechanism being provided inside the sound insulation interlayer.

[0006] Preferably, the sound insulation mechanism includes sound insulation boards and springs, a plurality of sound insulation boards are provided between the thermal insulation and noise reduction layer and the heat insulation and noise reduction layer, and a spring is provided between the sound insulation boards and the thermal insulation and noise reduction layer.

[0007] Preferably, the sound insulation board is arranged at an angle, and a V-shaped structure is arranged between two adjacent sound insulation boards, and the spring is arranged between the two adjacent sound insulation boards.

[0008] Preferably, the centralized air guide plate is arranged in a trumpet-shaped structure, the end of the centralized air guide plate with a larger opening is arranged toward the windward surface of the heating and ventilation duct, and the centralized air guide plate is arranged inside the flange.

[0009] Preferably, the connecting mechanism includes a connecting clamp, a locking plate and a connecting clamp ring. The outer circumferences of the flange and the docking flange are provided with connecting grooves. The outer circumferences of the flange and the docking flange are wrapped with a connecting clamp. Two locking plates are provided on the connecting clamp. Two connecting clamp rings are provided inside the connecting clamp. The connecting clamp ring is clamped inside the connecting groove, and the two locking plates are locked and connected by bolts.

[0010] Preferably, a sealing groove is provided on the side of the flange away from the heating and ventilation duct body, and a sealing ring is provided on one side of the docking flange, and the sealing ring is sealed inside the sealing groove.

[0011] Preferably, the sound insulation board is made of polyester fiberboard, the thermal insulation and noise reduction layer is set by a rock wool layer, the heat insulation and noise reduction layer is set by a pipe sleeve made of mineral wool, and the inner noise reduction layer is set by a glass wool layer.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The noise reduction device for the heating and ventilation duct is provided with a noise reduction outer protective tube arranged on the outside of the heating and ventilation duct body. The noise reduction outer protective tube is composed of a thermal insulation noise reduction layer, a sound insulation interlayer and a heat insulation noise reduction layer. Combined with the sound insulation board arranged inside the sound insulation interlayer, the outside of the heating and ventilation duct body has multiple layers of thermal insulation, sound insulation and noise reduction, which greatly reduces the external diffusion of the heating and ventilation duct body noise. The sound insulation board is arranged in a triangular shape, which has a supporting effect and strengthens the structural strength of the noise reduction outer protective tube.

[0014] 2. The noise reduction device for the heating and ventilation duct is used to centrally guide the airflow flowing inside the heating and ventilation duct body through a centralized air guide plate arranged inside the heating and ventilation duct body, thereby reducing the noise generated by the airflow flowing inside the heating and ventilation duct body and contacting the duct wall.

[0015] 3. The noise reduction device for the heating and ventilation duct is equipped with a flange on the heating and ventilation duct body. The connecting groove on the flange cooperates with the connecting ring on the connecting clamp to strengthen the sealing and stability between the flange and the docking flange on the heating and ventilation duct, thereby avoiding leakage noise during the assembly of the heating and ventilation duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 For this utility model Figure 1 A schematic diagram of the structure enlarged in the middle;

[0018] Figure 3 This is a schematic diagram of the structure of the flange in the utility model;

[0019] Figure 4 It is a structural schematic diagram of the connecting clamp in the utility model.

[0020] In the figure: 1. Heating and ventilation duct body; 2. Noise reduction outer protective tube; 21. Thermal insulation and noise reduction layer; 22. Sound insulation interlayer; 221. Sound insulation board; 222. Spring; 23. Thermal insulation and noise reduction layer; 3. Flange; 31. Sealing slot; 32. Connecting slot; 4. Centralized air guide plate; 5. Inner noise reduction layer; 6. Connecting clamp; 61. Locking plate; 62. Connecting clamp. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] like Figures 1 to 4As shown, the noise reduction device for the heating and ventilation pipe of the embodiment comprises a noise reduction outer protective pipe 2, the noise reduction outer protective pipe 2 is wrapped and sleeved on the outer circumference of the heating and ventilation pipe body 1, the opposite ends of the heating and ventilation pipe body 1 are each provided with a flange plate 3, the flange plate 3 is provided with two, the inside of the heating and ventilation pipe body 1 is provided with a plurality of concentrated air guide plates 4, the inner surface of the heating and ventilation pipe body 1 is covered with an inner noise reduction layer 5, the flange plate 3 is connected with the butt flange through bolts, a connecting mechanism is arranged between the flange plate 3 and the butt flange, the noise reduction outer protective pipe 2 comprises a heat preservation noise reduction layer 21, a sound insulation interlayer 22 and a heat insulation noise reduction layer 23, the outer circumference of the heating and ventilation pipe body 1 between the two flange plates 3 is wrapped with the heat preservation noise reduction layer 21, the outside of the heat preservation noise reduction layer 21 is sleeved with the heat insulation noise reduction layer 23, the sound insulation interlayer 22 is formed between the heat insulation noise reduction layer 23 and the heat preservation noise reduction layer 21, the inside of the sound insulation interlayer 22 is provided with a sound insulation mechanism, the heating and ventilation pipe body 1 has multiple layers of heat preservation, heat insulation, sound insulation and noise reduction on the outside, which greatly reduces the external diffusion of the noise of the heating and ventilation pipe body 1, strengthens the structural strength of the noise reduction outer protective pipe, concentrates the flow of the airflow in the heating and ventilation pipe body 1, reduces the noise generated by the airflow in the heating and ventilation pipe body 1 flowing in the inside and impacting the pipe wall, strengthens the sealing and stability of the flange plate 3 on the heating and ventilation pipe and the butt flange, and avoids the leakage noise of the heating and ventilation pipe assembly.

[0024] Specifically, the sound insulation mechanism comprises a sound insulation plate 221 and a spring 222, a plurality of sound insulation plates 221 are arranged between the heat preservation noise reduction layer 21 and the heat insulation noise reduction layer 23, the spring 222 is arranged between the sound insulation plate 221 and the heat preservation noise reduction layer 21, and the sound insulation plate 221 is used to strengthen the sound insulation and noise reduction of the heating and ventilation pipe body 1.

[0025] Further, the sound insulation plate 221 is arranged in an inclined manner, the adjacent two sound insulation plates 221 are arranged in a V-shaped structure, the spring 222 is arranged between the adjacent two sound insulation plates 221, the sound insulation plate 221 and the heat preservation noise reduction layer 21 are arranged in a triangular shape, which has a supporting effect and strengthens the structural strength of the noise reduction outer protective pipe 2.

[0026] Further, the concentrated air guide plate 4 is arranged in a horn-shaped structure, one end of the concentrated air guide plate 4 with a large opening is arranged towards the windward surface of the heating and ventilation pipe, the concentrated air guide plate 4 is arranged in the inside of the flange plate 3, the airflow enters the heating and ventilation pipe body 1 to flow, in the process of flowing, the airflow in the inside of the heating and ventilation pipe body 1 meets the concentrated air guide plate 4 in a horn-shaped structure to be guided and concentrated, so that the airflow at the edge of the pipe wall of the heating and ventilation pipe body 1 is guided and concentrated, the noise generated by the airflow in the inside of the heating and ventilation pipe body 1 flowing and impacting the pipe wall is reduced, and the airflow guided and concentrated enters and flows out of the heating and ventilation pipe body 1, reducing the impact of the airflow at the assembly of the heating and ventilation pipe body 1.

[0027] Furthermore, the connecting mechanism includes a connecting clamp 6, a locking plate 61 and a connecting clamp ring 62. A connecting groove 32 is provided on the outer circumference of the flange 3 and the docking flange. The outer circumference of the flange 3 and the docking flange is wrapped with a connecting clamp 6. Two locking plates 61 are provided on the connecting clamp 6. Two connecting clamp rings 62 are provided inside the connecting clamp 6. The connecting clamp ring 62 is clamped inside the connecting groove 32. The two locking plates 61 are fastened and connected by bolts. The connecting clamp 6 is wrapped around the outer circumference of the flange 3 and the docking flange. The connecting clamp ring 62 inside the connecting clamp 6 is sealed and clamped in the connecting groove 32 of the flange 3 and the docking flange. The bolts lock the two locking plates 61 on the connecting clamp 6, thereby strengthening the sealing and stability of the flange 3 and the docking flange on the heating and ventilation duct, and avoiding leakage noise during the assembly of the heating and ventilation duct.

[0028] Furthermore, a sealing groove 31 is provided on the side of the flange 3 away from the HVAC duct body 1, and a sealing ring is provided on one side of the docking flange. The sealing ring is sealed inside the sealing groove 31, and the sealing ring on the docking flange is sealed in the sealing groove 31 of the flange 3, and the HVAC duct body 1 is sealed and installed in the HVAC system pipeline.

[0029] Furthermore, the sound insulation board 221 is made of polyester fiber board, which is soundproof and has a supporting structure. The thermal insulation and noise reduction layer 21 is set with a rock wool layer, which has good thermal insulation and noise reduction properties. The thermal insulation and noise reduction layer 23 is set with a pipe sleeve made of mineral wool, which has good thermal insulation and noise reduction properties. The inner noise reduction layer 5 is set with a glass wool layer, which has good heat resistance and noise reduction properties.

[0030] The method of use of this embodiment is as follows: the flange 3 is connected and assembled with the docking flange of the HVAC system pipeline by bolts, the sealing collar on the docking flange is sealed in the sealing groove 31 of the flange 3, and the HVAC duct body 1 is sealed and installed in the HVAC system pipeline, the connecting clamp 6 is wrapped on the outer circumference of the flange 3 and the docking flange, and the connecting clamp 62 inside the connecting clamp 6 is sealed and clamped in the connecting groove 32 of the flange 3 and the docking flange, and the two locking plates 61 on the connecting clamp 6 are locked by bolts, thereby strengthening the sealing and stability between the flange 3 and the docking flange on the HVAC duct, avoiding the noise of HVAC duct assembly leakage, and the airflow enters the HVAC duct body 1 for circulation. During the circulation process, the airflow inside the HVAC duct body 1 encounters the concentrated air guide plate 4 with a trumpet-shaped structure to guide and concentrate the airflow, so that the HVAC duct body 1 pipe The airflow is concentrated at the edge of the wall, reducing the noise generated by the airflow flowing inside the heating and ventilation duct body 1 and contacting the duct wall, and the airflow is concentrated into the heating and ventilation duct body 1 and out of the heating and ventilation duct body 1, reducing the impact of the airflow at the assembly point of the heating and ventilation duct body 1. The noise reduction outer protective tube 2 is arranged on the outside of the heating and ventilation duct body 1, and the noise reduction outer protective tube 2 is composed of a thermal insulation and noise reduction layer 21, a sound insulation interlayer 22 and a heat insulation and noise reduction layer 23. Combined with the sound insulation board 221 arranged inside the sound insulation interlayer 22, the outside of the heating and ventilation duct body 1 has multiple layers of thermal insulation, sound insulation and noise reduction protection, and the inner noise reduction layer 5 covering the inner wall of the heating and ventilation duct body 1 greatly reduces the external diffusion of the noise of the heating and ventilation duct body 1, and the sound insulation board 221 and the thermal insulation and noise reduction layer 21 are arranged in a triangle, which has a supporting effect and strengthens the structural strength of the noise reduction outer protective tube 2.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A noise reduction device for a heating and ventilation duct, comprising a noise reduction outer protective tube (2), characterized in that: The noise reduction outer protective tube (2) is wrapped around the outer circumference of the heating ventilation duct body (1), and flanges (3) are provided at opposite ends of the heating ventilation duct body (1). There are two flanges (3). A plurality of concentrated air guide plates (4) are provided inside the heating ventilation duct body (1). The inner surface of the heating ventilation duct body (1) is covered with an inner noise reduction layer (5). The flange (3) is connected to the docking flange by bolts, and a connecting mechanism is provided between the flange (3) and the docking flange. The noise reduction outer protective tube (2) comprises a heat-insulating noise reduction layer (21), a sound-insulating interlayer (22) and a heat-insulating noise reduction layer (23); the outer circumference of the heating and ventilation duct body (1) between the two flanges (3) is wrapped with a heat-insulating noise reduction layer (21); the outer side of the heat-insulating noise reduction layer (21) is covered with a heat-insulating noise reduction layer (23); a sound-insulating interlayer (22) is formed between the heat-insulating noise reduction layer (23) and the heat-insulating noise reduction layer (21); and a sound-insulating mechanism is provided inside the sound-insulating interlayer (22).

2. The noise reduction device for heating and ventilation ducts according to claim 1, characterized in that: The sound insulation mechanism comprises sound insulation boards (221) and springs (222); a plurality of sound insulation boards (221) are provided between the heat preservation and noise reduction layer (21) and the heat insulation and noise reduction layer (23); and a spring (222) is provided between the sound insulation boards (221) and the heat preservation and noise reduction layer (21).

3. The noise reduction device for heating and ventilation ducts according to claim 2, characterized in that: The sound insulation plates (221) are arranged in an inclined manner, and a V-shaped structure is arranged between two adjacent sound insulation plates (221). The spring (222) is arranged between the two adjacent sound insulation plates (221).

4. The noise reduction device for heating and ventilation ducts according to claim 1, characterized in that: The centralized air guide plate (4) is arranged in a trumpet-shaped structure, and the end with a larger opening of the centralized air guide plate (4) is arranged toward the windward side of the heating and ventilation duct. The centralized air guide plate (4) is arranged inside the flange (3).

5. The noise reduction device for heating and ventilation ducts according to claim 1, characterized in that: The connecting mechanism comprises a connecting clamp (6), a locking plate (61) and a connecting clamp ring (62); a connecting clamp groove (32) is provided on the outer circumference of the flange (3) and the mating flange; a connecting clamp (6) is wrapped around the outer circumference of the flange (3) and the mating flange; two locking plates (61) are provided on the connecting clamp (6); two connecting clamp rings (62) are provided inside the connecting clamp (6); the connecting clamp ring (62) is clamped inside the connecting clamp groove (32), and the two locking plates (61) are locked and connected by bolts.

6. The noise reduction device for heating and ventilation ducts according to claim 1, characterized in that: A sealing groove (31) is provided on the side of the flange (3) away from the heating and ventilation duct body (1), and a sealing ring is provided on one side of the docking flange, the sealing ring being sealed inside the sealing groove (31).

7. The noise reduction device for heating and ventilation ducts according to claim 2, characterized in that: The sound insulation board (221) is made of polyester fiber board, the heat-insulating noise reduction layer (21) is provided by a rock wool layer, the heat-insulating noise reduction layer (23) is provided by a pipe sleeve made of mineral wool, and the inner noise reduction layer (5) is provided by a glass wool layer.

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