Noise reduction equipment for warm ventilation pipe

Abstract

The utility model discloses noise reduction equipment for a heating and ventilation pipe, and relates to the technical field of heating and ventilation equipment. The noise reduction device comprises a shell, a positioning mechanism is arranged on the surface of the shell, a protective cover is fixedly connected to an inner cavity of the shell, a noise reduction assembly is arranged in an inner cavity of the protective cover, and the positioning mechanism comprises a connecting frame. Through the synergistic effect of the sound absorption cylinder, the flow guide plate, the sound absorption layer and the sound insulation plate, aerodynamic noise, airflow friction noise and noise generated by airflow turbulence generated by a warm ventilation pipe system can be comprehensively and effectively controlled, targeted absorption of noise of different frequencies can be achieved, the adaptability of noise reduction equipment is improved, and the noise reduction effect is improved. The whole device is compact in structure, small in occupied space and convenient to install in a warm ventilation pipe system, through reasonable structural design and material selection, the manufacturing cost of the device is reduced while the good noise reduction effect is guaranteed, and the device has high cost performance.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of heating equipment, especially relates to a heating ventilation pipe noise reduction equipment. BACKGROUND

[0002] In modern buildings, the heating ventilation pipe system is an important facility to ensure the indoor environment comfort, however, the heating ventilation pipe will produce various noises in the operation process, which seriously affects people's living, working and resting environment, the fan is one of the main sources of noise of the heating ventilation pipe system, the rotation of the fan impeller, airflow impact and the like will produce aerodynamic noise, and the noise is transmitted to each room through the air pipe, meanwhile, the flow of airflow in the air pipe will rub against the inner wall of the air pipe, thereby forming airflow friction noise, especially under the condition that the wind speed is high or the air pipe inner wall is not smooth, the noise is more obvious.

[0003] Some traditional noise reduction structure designs are relatively single, and can only reduce a certain noise frequency, meanwhile, the existing noise reduction equipment also has defects in installation and maintenance, some equipment is large in size and inconvenient to install, and when the parts need to be replaced regularly, it is inconvenient to disassemble and maintain, thereby increasing the use cost.

[0004] Therefore, the utility model provides a heating ventilation pipe noise reduction equipment to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model discloses a heating ventilation pipe noise reduction equipment, and through the cooperation of the positioning mechanism and the noise reduction assembly, the problem that the noise reduction structure design in the prior art is relatively single and is inconvenient to disassemble and maintain when the parts need to be replaced regularly is solved.

[0006] To solve the above technical problems, the utility model is realized through the following technical schemes.

[0007] The utility model discloses a kind of heating ventilation pipe noise reduction equipment, including shell, the surface of the shell is provided with positioning mechanism, the inner chamber of the shell is fixedly connected with protective cover, the inner chamber of the protective cover is provided with noise reduction assembly, the positioning mechanism includes connecting frame, the side of the connecting frame is contacted with shell, connecting rod is penetrated and set in the top of the connecting frame, the side of the top of the connecting frame is fixedly connected with limit frame, the top of the limit frame is threadedly connected with rotating rod, the bottom of the rotating rod is movably connected with limit seat by bearing, the bottom of the limit seat is contacted with shell, the noise reduction assembly includes pipe body, the inner chamber of the pipe body is provided with guide vane, the inner chamber of the pipe body and the side fixedly connected with sound absorbing cylinder in guide vane, the side fixedly connected with sound-absorbing layer in the inner chamber of sound absorbing cylinder, the side fixedly connected with sound insulation board in the inner chamber of sound absorbing cylinder, shell is used as the external protective structure of whole equipment, made of stainless steel material, can guarantee the use intensity of the noise reduction equipment, the bottom of shell is contacted with connecting frame, the side of shell is installed by bolt, guarantee the stability of shell installation, the equipment is suspended and installed by positioning mechanism, connecting rod can move in the inner chamber of connecting frame, for the installation height of the equipment is debuged, improve the convenience of equipment installation, simultaneously be conducive to subsequent maintenance work to it.

[0008] The utility model further sets up, the top of the connecting rod is fixedly connected with mounting plate, both sides of the top of the mounting plate are all set with connecting hole, and the cooperation of mounting plate and connecting hole can connect positioning mechanism with installation site, guarantee the stability of noise reduction equipment connection, can reach the purpose of quick installation and disassembly simultaneously.

[0009] The utility model further sets up, the top of the connecting rod is fixedly connected with mounting plate, both sides of the top of the mounting plate are all set with connecting hole, and the cooperation of mounting plate and connecting hole can connect positioning mechanism with installation site, guarantee the stability of noise reduction equipment connection, can reach the purpose of quick installation and disassembly simultaneously.

[0010] The utility model further sets up, and the filling layer is made of sound-absorbing cotton between the protective cover and shell, the filling layer is made of sound-absorbing cotton, can fill the gap between shell and protective cover, reach the purpose of effective sound insulation and noise reduction.

[0011] The utility model further sets up, and the filling layer is made of sound-absorbing cotton between the protective cover and shell, the filling layer is made of sound-absorbing cotton, can fill the gap between shell and protective cover, reach the purpose of effective sound insulation and noise reduction.

[0012] The utility model further sets up, the inner chamber of air outlet cover is provided with grating, grating is movable structure, grating further improves the noise reduction effect, adjusts grating simultaneously, can conveniently adjust the size of air outlet.

[0013] The utility model further sets up, the guide vane is along the axial interval distribution of pipe body, and the shape of every guide vane is streamline, and the guide vane can guide the steady flow of airflow, reduces the turbulence and vortex of airflow, thereby reduces the noise that produces because airflow is disorderly.

[0014] The utility model further sets up, sound absorption layer and sound insulation board adopt porous sound absorption material, have the tiny pore of inside and outside intercommunication, the pore of sound absorption layer is honeycomb, the pore of sound insulation board is round hole structure, sound absorption layer and sound insulation board adopt glass wool porous sound absorption material and make, and porous sound absorption material has a large number of tiny pore and hole of inside and outside intercommunication, when sound wave is incident to material surface, a part of sound wave will be reflected, another part of sound wave will enter material interior, spreads in the pore, because of the viscous resistance and heat conduction effect of air, sound energy will constantly transform into heat energy and be consumed, thereby reach the purpose that sound absorption reduces noise.

[0015] The utility model has the following beneficial effects.

[0016] 1, the utility model discloses a synergistic effect of sound absorption cylinder, guide vane, sound absorption layer and sound insulation board can comprehensively and effectively control the aerodynamic noise, airflow friction noise and the noise that produces because airflow is disorderly of heating ventilation duct system, can realize the targeted absorption of different frequency noise, improve the adaptability of noise reduction equipment, and the whole equipment's structure is compact, and the occupied space is little, is convenient for installing in heating ventilation duct system, through reasonable structure design and material selection, guarantee good noise reduction effect while, reduce the manufacturing cost of equipment, have higher cost performance.

[0017] 2, the utility model discloses the cooperation of connecting frame, connecting rod and limit stop, and simple and quick installation is convenient for with the existing heating ventilation duct system connects, and the structure of sound absorption cylinder, guide vane, sound absorption layer and sound insulation board component is relatively simple, easy to disassemble and replace, reduce maintenance cost and difficulty, improve the service life of equipment. ACCURACY OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be to the embodiment description needed to use the drawing do simple introduction.

[0019] Figure 1 It is a kind of heating ventilation duct noise reduction equipment's perspective view.

[0020] Figure 2 It is a kind of heating ventilation duct noise reduction equipment's perspective view.

[0021] Figure 3 It is a perspective view of a positioning mechanism in a heating and ventilation pipe noise reduction device.

[0022] Figure 4 It is a rear perspective view of a heating and ventilation pipe noise reduction device.

[0023] Figure 5 It is a perspective view of a pipe body in a heating and ventilation pipe noise reduction device.

[0024] In the drawings: 1, shell; 2, positioning mechanism; 201, connecting frame; 202, connecting rod; 203, limiting frame; 204, rotating rod; 205, limiting seat; 3, protective cover; 4, noise reduction assembly; 401, pipe body; 402, flow guide plate; 403, sound absorbing cylinder; 404, sound absorbing layer; 405, sound insulation board; 5, mounting plate; 6, connecting hole; 7, first positioning hole; 8, filling layer; 9, air outlet cover; 10, connecting piece; 11, mounting hole; 12, grille. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. The described embodiments are only some of the embodiments of the present application, not all.

[0026] Embodiment one

[0027] Please refer to Figures 1-5 The utility model discloses a kind of heating and ventilation pipe noise reduction devices, including shell 1, the surface of shell 1 is provided with positioning mechanism 2, the inner chamber of shell 1 is fixedly connected with protective cover 3, the inner chamber of protective cover 3 is provided with noise reduction assembly 4, positioning mechanism 2 includes connecting frame 201, the side of connecting frame 201 is in contact with shell 1, connecting rod 202 is arranged in the top of connecting frame 201, the side of the top of connecting frame 201 is fixedly connected with limiting frame 203, the top of limiting frame 203 is threadedly connected with rotating rod 204, the bottom of rotating rod 204 is movably connected with limiting seat 205 by bearing, the bottom of limiting seat 205 is in contact with shell 1, noise reduction assembly 4 includes pipe body 401, the inner chamber of pipe body 401 is provided with flow guide plate 402, pipe body 401 is fixedly connected with sound absorbing cylinder 403 in the inner chamber and at the side of flow guide plate 402, sound absorbing layer 404 is fixedly connected on the side of the inner chamber of sound absorbing cylinder 403, sound insulation board 405 is fixedly connected on the side of the inner chamber of sound absorbing cylinder 403 and at sound absorbing layer 404.

[0028] Specifically, the shell 1 is made of stainless steel material and serves as an external protective structure of the entire device, capable of ensuring the use strength of the noise reduction device. The bottom of the shell 1 is in contact with the connecting frame 201, and the side of the shell 1 is installed through bolts, thereby ensuring the stability of the installation of the shell 1. The device is suspended and installed through the positioning mechanism 2. The connecting rod 202 can move in the inner cavity of the connecting frame 201, used for adjusting the installation height of the device, thereby improving the convenience of the installation of the device and facilitating the subsequent maintenance work.

[0029] Embodiment two

[0030] Please refer to Figures 1-5 On the basis of embodiment one, the top of the connecting rod 202 is fixedly connected with the mounting plate 5. The top of the mounting plate 5 is provided with connecting holes 6 on both sides. The top of one side of the connecting frame 201 is provided with a first positioning hole 7. One side of the shell 1 is provided with a second positioning hole matched with the first positioning hole 7. The filler layer 8 is arranged between the protective cover 3 and the shell 1. The filler layer 8 is made of sound-absorbing cotton. One side of the pipe body 401 is provided with an air outlet cover 9. The pipe body 401 is fixedly connected with connecting pieces 10 on both sides. The air outlet cover 9 is provided with mounting holes 11 on both sides of the surface. The inner cavity of the air outlet cover 9 is provided with a grille 12. The grille 12 is of a movable structure. The guide plates 402 are distributed along the axial direction of the pipe body 401 at intervals. The shape of each guide plate 402 is streamline. The sound-absorbing layer 404 and the sound insulation plate 405 are made of porous sound-absorbing material and have micro pores connected internally and externally. The pores of the sound-absorbing layer 404 are honeycomb-shaped. The pores of the sound insulation plate 405 are circular structures.

[0031] Specifically, the cooperation of the mounting plate 5 and the connecting holes 6 can connect the positioning mechanism 2 and the mounting part, thereby ensuring the stability of the connection of the noise reduction device and achieving the purpose of quick installation and disassembly. The first positioning hole 7 and the second positioning hole are used to connect the shell 1 and the connecting frame 201, thereby ensuring the stability of the installation of the shell 1 on the connecting frame 201. The filler layer 8 is made of sound-absorbing cotton, which can fill the gap between the shell 1 and the protective cover 3 and achieve the purpose of effective sound insulation and noise reduction. The air outlet cover 9 is connected with the pipe body 401 through the connecting pieces 10 and the mounting holes 11, thereby ensuring the stability of the installation of the air outlet cover 9. The grille 12 further improves the noise reduction effect. The adjustable grille 12 can conveniently adjust the size of the air outlet. The guide plates 402 can guide the smooth flow of air flow, reduce the turbulence and vortex of air flow, thereby reducing the noise generated by the turbulence of air flow. The sound-absorbing layer 404 and the sound insulation plate 405 are made of glass wool porous sound-absorbing material. The porous sound-absorbing material has a large number of micro pores and holes connected internally and externally. When sound waves are incident on the surface of the material, part of the sound waves will be reflected, and another part of the sound waves will enter the material and propagate in the pores. Due to the viscous resistance and heat conduction of air, sound energy will be continuously converted into heat energy and consumed, thereby achieving the purpose of sound absorption and noise reduction.

[0032] The working principle of the utility model is: sound absorption cylinder 403 and sound absorption layer 404 can absorb most of the middle and high frequency noise, deflector 402 reduces airflow turbulence, reduces noise generation, sound insulation board 405 prevents noise from spreading outward, the streamline design and reasonable size, spacing of deflector 402 can effectively guide airflow to flow smoothly, reduce energy loss, reduce noise generation at the same time, connect positioning mechanism 2 with installation part, adjust the distance of connecting rod 202, can realize the purpose of adjusting the installation height of shell 1, rotate rotary rod 204, rotary rod 204 drives limit seat 205 to move, limit seat 205 contacts shell 1 and fixes shell 1, guarantees the stability of shell 1 installation on connecting frame 201.

[0033] The above disclosed preferred embodiments of the utility model are only used to help describe the utility model, the preferred embodiments do not describe all the details, and the utility model is not limited to the specific implementation mode, the description selects and specifically describes these embodiments, in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model.

Claims

1. A heating and ventilating duct noise reduction device comprising a housing (1), characterised in that: The surface of the shell (1) is provided with a positioning mechanism (2), and the inner cavity of the shell (1) is fixedly connected with a protective cover (3), and the inner cavity of the protective cover (3) is provided with a noise reduction assembly (4). The positioning mechanism (2) comprises a connecting frame (201), one side of the connecting frame (201) is in contact with the shell (1), a connecting rod (202) is penetratingly arranged at the top of the connecting frame (201), a limiting frame (203) is fixedly connected to one side of the top of the connecting frame (201), a rotating rod (204) is threadedly connected to the top of the limiting frame (203), a limiting seat (205) is movably connected to the bottom of the rotating rod (204) through a bearing, and the bottom of the limiting seat (205) is in contact with the shell (1). The noise reduction assembly (4) comprises a pipe body (401), the inner cavity of the pipe body (401) is provided with a guide vane (402), the inner cavity of the pipe body (401) and one side of the guide vane (402) are fixedly connected with a sound absorption cylinder (403), one side of the inner cavity of the sound absorption cylinder (403) is fixedly connected with a sound absorption layer (404), and the inner cavity of the sound absorption cylinder (403) and one side of the sound absorption layer (404) are fixedly connected with a sound insulation board (405).

2. A duct noise reduction device according to claim 1, wherein: The top of the connecting rod (202) is fixedly connected with a mounting plate (5), and connecting holes (6) are formed in the top of the mounting plate (5) on both sides.

3. A duct noise reduction device according to claim 1, wherein: A first positioning hole (7) is formed in the top of one side of the connecting frame (201), and a second positioning hole is formed in one side of the shell (1) and matched with the first positioning hole (7).

4. A duct noise reduction device according to claim 1, wherein: A filling layer (8) is arranged between the protective cover (3) and the shell (1), and the filling layer (8) is made of sound-absorbing cotton.

5. A duct noise reduction device according to claim 1, wherein: One side of the pipe body (401) is provided with an air outlet cover (9), and connecting pieces (10) are fixedly connected to both sides of the pipe body (401), mounting holes (11) are formed in the surface of the air outlet cover (9) on both sides.

6. A duct noise reduction device according to claim 5, wherein: The inner cavity of the air outlet cover (9) is provided with a grille (12), and the grille (12) is of a movable structure.

7. A duct noise reduction device according to claim 1, wherein: The guide vanes (402) are spaced apart along the axial direction of the pipe body (401), and each guide vane (402) is of a streamlined shape.

8. A duct noise reduction device according to claim 1, wherein: The sound absorption layer (404) and the sound insulation board (405) are made of porous sound absorption materials and have micro pores connected internally and externally, the pores of the sound absorption layer (404) are honeycomb-shaped, and the pores of the sound insulation board (405) are circular holes.

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