Ventilation pipeline silencer

Abstract

The utility model relates to the technical field of air duct silencers, in particular to a ventilating duct silencer which can disturb and guide airflow, so that the airflow can stay for more time, and better sound absorption and noise reduction functions can be realized. Comprising a box body, two connecting flanges, a turbulent flow assembly, a silencing assembly and a filtering assembly, the connecting flanges are fixedly connected to the left end and the right end of the box body, the turbulent flow assembly is installed at the left end of the interior of the box body and comprises a plurality of conical flow guide plates, a plurality of second conical flow guide plates and a plurality of arc-shaped flow guide plates, and the silencing assembly is installed in the middle of the box body; and the filtering assembly is detachably mounted at the right end in the box body.

Description

Technical Field

[0001] The utility model relates to the technical field of air duct mufflers, in particular to a ventilation duct muffler. Background Art

[0002] The muffler of the ventilation duct, also known as the static pressure box, is a device that allows airflow to pass through and can effectively prevent or weaken the propagation of sound energy outward. It is a necessary accessory for the air supply system to reduce dynamic pressure, increase static pressure, stabilize airflow and reduce airflow vibration. It can prevent sound propagation and allow airflow to pass through. At the same time, it can be used to reduce noise, obtain uniform static pressure air outlet, reduce dynamic pressure loss, and also has the function of a universal joint. Applying the muffler of the ventilation duct to the ventilation system can not only improve the air supply effect but also improve the comprehensive performance of the ventilation system. The prior art publication number CN111219561A proposes a muffler for purifying ventilation ducts, including a shell and connecting flanges arranged at both ends of the shell, the inner wall of the shell is connected to the foam aluminum plate through a keel around the inner wall, the inner cavity of the shell is divided into a plurality of equal cavities by a triangular guide plate, the front and rear sides of the triangular guide plate are connected to the inner wall of the shell through the keel, and the two ends of the triangular guide plate are respectively provided with triangular drainage ends, and the triangular guide plate includes an outer wrapping plate, a centrifugal glass wool in the middle and an alkali-free glass cloth in the core. However, due to the lack of a spoiler structure, the time the airflow stays in the main pipe is very limited, which is not conducive to better sound absorption. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a ventilation duct muffler which can disturb and guide the airflow so that the airflow can stay for a longer time and can achieve better sound absorption and noise reduction functions.

[0004] The utility model discloses a ventilation duct silencer, comprising a box body, two connecting flanges, a spoiler component, a silencer component and a filter component. The left and right ends of the box body are fixedly connected with connecting flanges, the spoiler component is installed at the inner left end of the box body, the silencer component is installed at the middle part of the box body, and the filter component is detachably installed at the inner right end of the box body. The box body is installed through the connecting flange, and the airflow is input at the left end of the box body. The airflow is disturbed and guided by the spoiler component so that the airflow can stay in the box body for a longer time, thereby achieving better sound absorption and noise reduction functions and greatly improving work efficiency. The silencer component can better absorb and reduce the sound of the passing airflow, and at the same time the filter component can reduce the air pollution caused by the emission of toxic gases from chemical plants into the atmosphere, and the detachable design facilitates the replacement of the filter component.

[0005] Preferably, the spoiler assembly includes a plurality of conical guide plates, a plurality of second conical guide plates and a plurality of arc guide plates, the plurality of conical guide plates are evenly spaced and installed at the inner left end of the box, the plurality of second conical guide plates are installed in cooperation with the conical guide plates at the inner left end of the box, and the plurality of arc guide plates are installed on the inner wall of the box between the conical guide plates and the second conical guide plates; the airflow is input at the left end of the box, and under the guiding effect of the conical guide plates, the airflow will be blown toward the arc guide plates, and after the airflow is guided by the spoiler of the arc guide plates, it will impact with the airflow input from the rear to reduce the flow velocity, and then flow toward the second conical guide plates, and the airflow passes through the gaps between the plurality of second conical guide plates before flowing out, so that the final blown airflow is more uniform and the wind noise is lower, and the conical guide plates, the second conical guide plates and the arc guide plates can cooperate to play a better spoiler and guiding role on the blown-in airflow, so that the airflow can stay in the box for a longer time.

[0006] Preferably, the sound-absorbing component includes two arc-shaped plates, a polyurethane sound-absorbing sponge sheet, a second polyurethane sound-absorbing sponge sheet, a central diverter plate and a sound-insulating felt sound-absorbing sheet. The two arc-shaped plates are symmetrically installed on the front and rear end side walls of the box body. The right ends of the two arc-shaped plates are installed with polyurethane sound-absorbing sponge sheets, and the sound-insulating felt sound-absorbing sheet is installed on the inner wall of the box body on the right side of the polyurethane sound-absorbing sponge sheets. The left end of the sound-insulating felt sound-absorbing sheet is installed with a central diverter plate. The outer wall of the central diverter plate is provided with a plurality of evenly distributed sound-absorbing holes, and the inner wall thereof is bonded with a non-woven fabric layer, and the inner side of the non-woven fabric layer is filled with sound-absorbing glass wool. A second polyurethane sound-absorbing sponge sheet is installed at the front and rear ends of the inner wall of the box, and the second polyurethane sound-absorbing sponge sheet is located between the polyurethane sound-absorbing sponge sheet and the sound insulation felt sound-absorbing sheet; the airflow passes through the polyurethane sound-absorbing sponge sheet under the guidance of the arc plate and contacts the central diverter plate, and a part of the airflow flows in the space between the polyurethane sound-absorbing sponge sheet and the sound insulation felt sound-absorbing sheet, and is silenced by the polyurethane sound-absorbing sponge sheet and the second polyurethane sound-absorbing sponge sheet, and then flows to the right through the sound insulation felt sound-absorbing sheet. The airflow can stay in the box for a longer time, and can achieve better sound absorption and noise reduction functions.

[0007] Preferably, the filter assembly includes two sealing cover plates, a primary filter screen, a glass fiber high-efficiency filter plate, an activated carbon filter screen and mounting bolts, slots are fixedly installed on the inner walls at the front and rear ends of the right side of the box body, and a plug-in slot matching the slot position is opened on the top of the box body, and the sealing cover plate is installed on the top of the box body through multiple mounting bolts, and the bottom end of the sealing cover plate is installed with a primary filter screen, a glass fiber high-efficiency filter plate and an activated carbon filter screen from left to right, and inserted between the two slots; after the airflow flows to the right end of the box body, it will pass through the primary filter screen, the glass fiber high-efficiency filter plate and the activated carbon filter screen in turn to filter harmful substances in the gas, thereby effectively preventing the toxic gas contained in the gas from being discharged into the atmosphere and endangering people's health, increasing the use function, and unscrewing the mounting bolts, the sealing cover plate can be pulled to take out the primary filter screen, the glass fiber high-efficiency filter plate and the activated carbon filter screen in the box body, which is convenient for replacement and cleaning.

[0008] Preferably, blocking fences are installed at the left and right ends of the box body by screws; the blocking fences can protect and block the left and right ends of the box body to prevent large debris from entering and causing blockage.

[0009] Preferably, a plurality of reinforcing ribs are fixedly connected to the outer walls at the front and rear ends of the box body; the plurality of reinforcing ribs can increase the overall strength of the box body and prevent it from deforming and affecting its use.

[0010] Preferably, a connecting frame is fixedly connected to the top of the box body, and fixing holes are provided at the left and right ends of the connecting frame; the box body can be installed and supported by the connecting frame, thereby improving stability during use.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the box is installed through the connecting flange, the airflow is input at the left end of the box, and the airflow is disturbed and guided by the spoiler component, so that the airflow can stay in the box for a longer time, thereby achieving better sound absorption and noise reduction functions, and greatly improving work efficiency. The silencer component can better absorb and reduce the sound of the airflow passing through, and at the same time, the filter component can reduce the pollution of the air caused by the emission of toxic gases from chemical plants into the atmosphere, and the detachable design facilitates the replacement of the filter component. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a schematic diagram of the axonometric structure of the utility model;

[0014] Figure 3 It is a front cross-sectional structural schematic diagram of the utility model;

[0015] Figure 4It is a schematic diagram of the cross-sectional structure of the utility model viewed from above;

[0016] Figure 5 It is a schematic diagram of the internal structure of the utility model;

[0017] Markings in the attached drawings: 1. Box body; 2. Connecting flange; 3. Conical guide plate; 4. Second conical guide plate; 5. Arc guide plate; 6. Arc plate; 7. Polyurethane sound-absorbing sponge sheet; 8. Second polyurethane sound-absorbing sponge sheet; 9. Central diverter plate; 10. Sound-insulating felt sound-absorbing sheet; 11. Slot; 12. Sealing cover plate; 13. Primary filter screen; 14. Glass fiber high-efficiency filter plate; 15. Activated carbon filter screen; 16. Mounting bolts; 17. Blocking fence; 18. Reinforcing ribs; 19. Connecting frame. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0019] Example 1

[0020] like Figure 1 , Figure 3 , Figure 4 and Figure 5 The left and right ends of the box body 1 are fixedly connected with connecting flanges 2, a plurality of conical guide plates 3 are evenly spaced and installed at the inner left end of the box body 1, a plurality of second conical guide plates 4 are installed in cooperation with the conical guide plates 3 at the inner left end of the box body 1, a plurality of arc guide plates 5 are installed on the inner wall of the box body 1 between the conical guide plates 3 and the second conical guide plates 4, two arc plates 6 are symmetrically installed on the front and rear end side walls of the box body 1, a polyurethane sound-absorbing sponge sheet 7 is installed on the right end of the two arc plates 6, a sound-absorbing felt sheet 10 is installed on the inner wall of the box body 1 on the right side of the polyurethane sound-absorbing sponge sheet 7, a central diverter plate 9 is installed on the left end of the sound-absorbing felt sheet 10, and a plurality of evenly distributed diverters are provided on the outer wall of the central diverter plate 9 The sound-absorbing holes of the cloth are bonded with a non-woven fabric layer on the inner wall, and the inner side of the non-woven fabric layer is filled with sound-absorbing glass wool. The second polyurethane sound-absorbing sponge sheet 8 is installed at the front and rear ends of the inner wall of the box body 1, and the second polyurethane sound-absorbing sponge sheet 8 is located between the polyurethane sound-absorbing sponge sheet 7 and the sound-insulating felt sound-absorbing sheet 10. Slots 11 are fixedly installed on the inner walls of the front and rear ends of the right side of the box body 1. The top of the box body 1 is provided with a plug-in slot matching the position of the slot 11. The sealing cover plate 12 is installed on the top of the box body 1 through a plurality of mounting bolts 16. The bottom end of the sealing cover plate 12 is installed with a primary filter screen 13, a glass fiber high-efficiency filter plate 14 and an activated carbon filter screen 15 from left to right in sequence, and is inserted between the two slots 11;

[0021] The box body 1 is installed through the connecting flange 2, and the air flow is input at the left end of the box body 1. Under the guiding effect of the conical guide plate 3, the air flow will blow to the arc guide plate 5. After the air flow is guided by the spoiler of the arc guide plate 5, it collides with the air flow input from the rear to reduce the flow velocity, and then flows to the second conical guide plate 4. The air flow passes through the gaps between multiple second conical guide plates 4 and flows out, so that the final blown air flow is more uniform and the wind noise is lower. The conical guide plate 3, the second conical guide plate 4 and the arc guide plate 5 can cooperate to better spoil and guide the blown air flow, so that the air flow can stay in the box body 1 for a longer time. Under the guidance of the arc plate 6, the air flow passes through the polyurethane sound-absorbing sponge sheet 7 and contacts with the central diverter plate 9. A part of the air flow is between the polyurethane sound-absorbing sponge sheet 7 and the sound insulation board 9. The air flows in the space between the felt sound-absorbing sheets 10, is silenced by the polyurethane sound-absorbing sponge sheet 7 and the second polyurethane sound-absorbing sponge sheet 8, and then flows to the right through the sound-proof felt sound-absorbing sheet 10. The airflow can stay in the box body 1 for a longer time, and can achieve better sound absorption and noise reduction functions. After the airflow flows to the right end of the box body 1, it will pass through the primary filter screen 13, the glass fiber high-efficiency filter plate 14 and the activated carbon filter screen 15 in turn to filter the harmful substances in the gas, thereby effectively preventing the toxic gas contained in the gas from being discharged into the atmosphere and endangering people's health. The use function is increased by unscrewing the mounting bolts 16, and the sealing cover plate 12 can be pulled to take out the primary filter screen 13, the glass fiber high-efficiency filter plate 14 and the activated carbon filter screen 15 in the box body 1, so as to facilitate replacement and cleaning.

[0022] Example 2

[0023] like Figure 2 As shown, on the basis of Example 1, blocking fences 17 are installed on the left and right ends of the box body 1 by screws, a plurality of reinforcing ribs 18 are fixedly connected to the outer walls of the front and rear ends of the box body 1, and a connecting frame 19 is fixedly connected to the top of the box body 1, and fixing holes are opened on the left and right ends of the connecting frame 19;

[0024] The blocking fence 17 can be used to protect the left and right ends of the box 1 to prevent large debris from entering and causing blockage. The multiple reinforcing ribs 18 can increase the overall strength of the box 1 to prevent it from deforming and affecting its use. The connecting frame 19 can be used to install and support the box 1 to improve its stability during use.

[0025] like Figures 1 to 5As shown, a ventilation duct silencer of the utility model is installed through the connecting flange 2 when it is working, the box body 1 is installed through the connecting flange 2, the airflow is input at the left end of the box body 1, and the left and right ends of the box body 1 can be protected and blocked by the blocking fence 17. Under the guiding effect of the conical guide plate 3, the airflow will blow to the arc guide plate 5, and after the airflow is guided by the spoiler of the arc guide plate 5, it will impact with the airflow input from the rear to reduce the flow rate, and then flow to the second conical guide plate 4, and the airflow passes through the gaps between multiple second conical guide plates 4 and then flows out, so that the final blown airflow is more uniform and the wind noise is lower. Under the guidance of the arc plate 6, the airflow passes through the polyurethane sound-absorbing sponge sheet 7 and contacts the central diverter plate 9. A part of the airflow flows in the space between the polyurethane sound-absorbing sponge sheet 7 and the sound-insulating felt sound-absorbing sheet 10, and is silenced by the polyurethane sound-absorbing sponge sheet 7 and the second polyurethane sound-absorbing sponge sheet 8, and then flows to the right through the sound-insulating felt sound-absorbing sheet 10. After the airflow flows to the right end of the box body 1, it will pass through the primary filter 13, the glass fiber high-efficiency filter plate 14 and the activated carbon filter 15 in turn to filter the harmful substances in the gas, thereby effectively preventing the toxic gases contained in the gas from being discharged into the atmosphere.

[0026] The polyurethane sound-absorbing sponge sheet 7, the second polyurethane sound-absorbing sponge sheet 8, the sound-insulating felt sound-absorbing sheet 10, the primary filter screen 13, the glass fiber high-efficiency filter plate 14 and the activated carbon filter screen 15 of the ventilation duct silencer of the utility model are purchased on the market, and the technical personnel in the industry only need to install and operate them according to the accompanying instruction manual, without the need for the technical personnel in this field to make creative labor.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A ventilation duct muffler, characterized in that: The invention comprises a box body (1), two connecting flanges (2), a spoiler component, a silencer component and a filter component. The left and right ends of the box body (1) are fixedly connected with the connecting flanges (2). The spoiler component is installed at the left end inside the box body (1). The silencer component is installed in the middle of the box body (1). The filter component is detachably installed at the right end inside the box body (1).

2. A ventilation duct muffler as claimed in claim 1, characterized in that: The spoiler assembly comprises a plurality of conical guide plates (3), a plurality of second conical guide plates (4) and a plurality of arc-shaped guide plates (5); the plurality of conical guide plates (3) are evenly spaced and installed at the left end of the interior of the box (1); the plurality of second conical guide plates (4) are installed in cooperation with the conical guide plates (3) at the left end of the interior of the box (1); and the plurality of arc-shaped guide plates (5) are installed on the inner wall of the box (1) between the conical guide plates (3) and the second conical guide plates (4).

3. A ventilation duct muffler as claimed in claim 1, characterized in that: The sound-absorbing component comprises two arc-shaped plates (6), a polyurethane sound-absorbing sponge sheet (7), a second polyurethane sound-absorbing sponge sheet (8), a central flow-dividing plate (9) and a sound-insulating felt sound-absorbing sheet (10). The two arc-shaped plates (6) are symmetrically mounted on the front and rear side walls of the box body (1). The right ends of the two arc-shaped plates (6) are mounted with the polyurethane sound-absorbing sponge sheet (7). The sound-insulating felt sound-absorbing sheet (10) is mounted on the inner wall of the box body (1) on the right side of the polyurethane sound-absorbing sponge sheet (7). The left end of the sound-insulating felt sound-absorbing sheet (10) is mounted with the central flow-dividing plate (9). The outer wall of the central flow-dividing plate (9) is provided with a plurality of evenly distributed sound-absorbing holes, and the inner wall thereof is bonded with a non-woven fabric layer, the inner side of the non-woven fabric layer is filled with sound-absorbing glass wool. The second polyurethane sound-absorbing sponge sheet (8) is mounted on the front and rear ends of the inner wall of the box body (1), and the second polyurethane sound-absorbing sponge sheet (8) is located between the polyurethane sound-absorbing sponge sheet (7) and the sound-insulating felt sound-absorbing sheet (10).

4. A ventilation duct muffler as claimed in claim 1, characterized in that: The filter assembly comprises two sealing cover plates (12), a primary filter screen (13), a glass fiber high-efficiency filter plate (14), an activated carbon filter screen (15) and mounting bolts (16); slots (11) are fixedly mounted on the inner walls at the front and rear ends of the right side of the box body (1); a plug-in slot matching the position of the slot (11) is provided on the top of the box body (1); the sealing cover plate (12) is mounted on the top of the box body (1) by means of a plurality of mounting bolts (16); the primary filter screen (13), the glass fiber high-efficiency filter plate (14) and the activated carbon filter screen (15) are mounted on the bottom end of the sealing cover plate (12) in sequence from left to right, and are inserted between the two slots (11).

5. A ventilation duct muffler as claimed in claim 1, characterized in that: Blocking fences (17) are installed at the left and right ends of the box body (1) by means of screws.

6. A ventilation duct muffler as claimed in claim 1, characterized in that: A plurality of reinforcing ribs (18) are fixedly connected to the outer walls at the front and rear ends of the box body (1).

7. A ventilation duct muffler as claimed in claim 1, characterized in that: A connecting frame (19) is fixedly connected to the top of the box body (1), and fixing holes are provided at the left and right ends of the connecting frame (19).

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