Array type silencer applied to ventilation system

Abstract

The invention provides an array type silencer applied to a ventilation system, and relates to the technical field of noise reduction and silencing, the array type silencer comprises a plurality of silencing modules, the silencing modules are arranged in an exhaust pipe through a limiting frame array, the exhaust pipe comprises an exhaust outer pipe and an exhaust inner pipe, the exhaust inner pipe is provided with a plurality of silencing holes, and the silencing modules are arranged in the exhaust outer pipe. Sound insulation cotton is arranged between the air exhaust outer pipe and the air exhaust inner pipe, the multiple silencing modules are fixedly hung in the air exhaust pipe through the limiting frame, the multiple silencing modules arranged in an array mode conduct superposition silencing on noise generated when a draught fan is introduced into the air exhaust pipe, the multiple silencing holes in the air exhaust inner pipe reduce the speed of entering air flow and the sound wave frequency, and the noise is reduced. Meanwhile, the noise transmission efficiency is reduced due to the impedance layer formed by the noise reduction holes, and the noise is further absorbed by the sound insulation cotton, so that the noise generated in the ventilation system is eliminated, the ventilation system does not influence the surrounding working and living environment, and the negative influence on the body health of surrounding personnel is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of noise reduction and silencing, and in particular to an array type silencer applied to a ventilation system. Background Art

[0002] The ventilation system is a building environment control technology that controls the spread and harm of air pollutants by means of ventilation dilution or ventilation exclusion, and ensures the quality of indoor and outdoor air environment through exhaust ducts. It includes fans. Fans rely on input mechanical energy to increase gas pressure and discharge gas. It is a general-purpose mechanical equipment with a wide range of uses. The production of various industries such as electricity, mining, machinery, metallurgy, and chemical industry cannot be separated from fans. However, fans and airflows generate noise during operation, which affects the working and living environment. Long-term exposure to noise can also have a negative impact on physical health. Existing ventilation systems, such as a ventilation equipment and ventilation system announced in 202110627538.5, have poor silencing ability during the ventilation process. Therefore, an array silencer applied to the ventilation system is needed to effectively eliminate the noise generated in the ventilation system. Summary of the invention

[0003] The present invention provides an array type silencer applied to a ventilation system, so as to solve the defects in the prior art.

[0004] The present invention provides an array silencer for use in a ventilation system, comprising: a plurality of silencer modules, wherein the plurality of silencer modules are arranged in an exhaust duct through a limit frame array, the exhaust duct comprises an exhaust outer pipe and an exhaust inner pipe, a plurality of silencer holes are provided on the exhaust inner pipe, and sound insulation cotton is arranged between the exhaust outer pipe and the exhaust inner pipe.

[0005] Preferably, the silencer module includes an air inlet outer pipe, one end of the air inlet outer pipe is an air inlet, the other end of the air inlet outer pipe is connected and communicated with one end of the air passage duct, the other end of the air passage duct is connected and communicated with one end of the air outlet outer pipe, the other end of the air outlet outer pipe is provided with an air outlet, and the inner sides of the air inlet outer pipe, the air passage duct and the air outlet outer pipe are respectively provided with silencer inner cylinders, a plurality of silencer holes are provided on the silencer inner cylinder, and silencer cotton is provided between the air inlet outer pipe, the air passage duct, the air outlet outer pipe and the silencer inner cylinder.

[0006] Preferably, a diverter pipe is provided at the air inlet, a diverter inner pipe is provided inside the diverter pipe, a plurality of silencer holes are provided on the diverter inner pipe, silencer cotton is provided between the diverter pipe and the diverter inner pipe, and a plurality of diverter holes are opened on the diverter pipe and the diverter inner pipe.

[0007] Preferably, a cartridge for inserting the other end of the air inlet outer pipe is fixedly provided on the inner wall of the air duct, and fixing plates are fixedly provided on the outer walls of the air inlet outer pipe, the air duct and the air outlet outer pipe respectively. The fixing plates attached to each other are fixed by bolts, and the top of the fixing plates is an inclined surface.

[0008] Preferably, connecting columns are fixedly provided on the upper, lower, left and right outer walls of the air duct respectively, and an insert plate is provided on the other end of the connecting column. One end of the limit frame is fixedly connected to the inner wall of the exhaust inner pipe, and the other end of the limit frame is provided with a half slot on the side facing the air inlet, and the insert plate is inserted in the half slot.

[0009] Preferably, a mounting groove is provided at the top of the air duct, a bottom groove is provided at the bottom of the inner wall of the air duct, a filter plate is inserted in the mounting groove and the bottom groove, a locking groove is provided at the top of the filter plate, a rotating plate is rotatably provided at the top of the air duct, and the rotating plate is rotatably inserted in the locking groove.

[0010] Preferably, it also includes:

[0011] A velocity measurement module, used to measure the wind flow velocity in the silencing module;

[0012] An alarm module, provided in each silencing module, for sounding an alarm;

[0013] The area division module numbers each muffler module arranged in an array and the alarm module therein accordingly;

[0014] A calculation module 1, used to calculate the resonance frequency of the silencer module during silence based on the wind flow velocity in the silencer module;

[0015] A processing module, used for comparing the resonance frequency of the muffler module during muffler operation obtained by the calculation module 1 with the rated resonance frequency of the muffler module;

[0016] The control module, when the resonance frequency of a certain silencer module during silencing is greater than or equal to the rated resonance frequency of the silencer module, the alarm module in the silencer module sounds an alarm; when the resonance frequency of a certain silencer module during silencing is less than the rated resonance frequency of the silencer module, the silencer module works normally.

[0017] Preferably, the calculation module 1 calculates based on the following formula 1:

[0018]

[0019] f1 is the resonance frequency of the silencer module during silencing, v is the airflow velocity in the silencer module detected by the velocity measurement module, π is the pi, L is the length between the air inlet and the air outlet, d1 is the diameter of the silencer hole on the silencer inner cylinder, σ is the perforation rate of the silencer inner cylinder, n is the number of silencer holes on the silencer inner cylinder, r1 is the inner diameter of the air duct, and D is the thickness of the silencer inner cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall cross-sectional structure provided by an embodiment of the present invention;

[0023] Figure 3 It is a schematic cross-sectional structure diagram of a noise reduction module provided in an embodiment of the present invention.

[0024] Reference numerals:

[0025] 1. Exhaust duct; 11. Exhaust outer duct; 12. Exhaust inner duct; 13. Sound insulation cotton; 2. Limiting frame; 21. Half slot; 3. Connecting column; 31. Plug plate; 4. Silencer module; 41. Inlet outer duct; 411. Air inlet; 412. Diverter pipe; 413. Diverter hole; 42. Air duct; 421. Cylinder; 422. Fixing plate; 423. Mounting slot; 424. Bottom slot; 425. Filter plate; 426. Locking slot; 427. Rotating plate; 43. Outlet outer duct; 431. Air outlet; 44. Silencer inner tube; 45. Sound insulation cotton. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0027] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] The present invention provides the following embodiments

[0029] Example 1

[0030] The embodiment of the present invention provides an array type muffler applied to a ventilation system, such as Figure 1 As shown, it includes: a plurality of silencer modules 4, wherein the plurality of silencer modules 4 are arranged in an array in an exhaust duct 1 through a limit frame 2, wherein the exhaust duct 1 includes an exhaust outer pipe 11 and an exhaust inner pipe 12, wherein the exhaust inner pipe 12 is provided with a plurality of silencer holes, and sound insulation cotton 13 is arranged between the exhaust outer pipe 11 and the exhaust inner pipe 12.

[0031] The working principle and beneficial effects of the above technical solution are as follows: the limiting frame 2 fixes and hangs multiple silencer modules 4 in the exhaust duct 1, and the multiple silencer modules 4 arranged in an array superimpose and silence the noise generated by the fan introduced into the exhaust duct 1. The multiple silencer holes on the exhaust inner pipe 12 reduce the incoming wind flow velocity and sound wave frequency. At the same time, the impedance layer formed by the silencer holes also reduces the noise propagation efficiency. The sound insulation cotton 13 further absorbs the noise, thereby silencing the noise generated in the ventilation system, so that the ventilation system does not affect the surrounding work and living environment, and does not have a negative impact on the health of surrounding people.

[0032] Example 2

[0033] On the basis of Example 1, Figure 1-Figure 3As shown, the silencer module 4 includes an air inlet outer pipe 41, one end of the air inlet outer pipe 41 is an air inlet 411, the other end of the air inlet outer pipe 41 is connected and communicated with one end of the air passage 42, the other end of the air passage 42 is connected and communicated with one end of the air outlet outer pipe 43, the other end of the air outlet outer pipe 43 is provided with an air outlet 431, and the inner sides of the air inlet outer pipe 41, the air passage 42, and the air outlet outer pipe 43 are respectively provided with silencer inner tubes 44, and a plurality of silencer holes are provided on the silencer inner tube 44, and silencer cotton 45 is provided between the air inlet outer pipe 41, the air passage 42, the air outlet outer pipe 43 and the silencer inner tube 44.

[0034] The working principle and beneficial effects of the above technical solution are as follows: the airflow in the exhaust duct 1 enters the air inlet outer pipe 41, the air duct 42, and the air outlet outer pipe 43 from the air inlet 411, and is then discharged from the air outlet 431. The diameter of the air outlet 431 is larger than the diameter of the air inlet 411, which can effectively reduce the vibration frequency of the airflow in the air inlet outer pipe 41, the air duct 42, and the air outlet outer pipe 43, thereby reducing the noise. The multiple silencer holes arranged on the silencer inner tube 44 increase the friction between the airflow and the hole wall, convert the sound wave energy of the airflow into heat energy, and further reduce the noise. The silencer cotton 45 further absorbs the generated noise, thereby enhancing the noise reduction and silencing ability of the silencer module.

[0035] Example 3

[0036] On the basis of Example 2, Figure 1-Figure 3 As shown, a diverter pipe 412 is provided at the air inlet 411, a diverter inner pipe is provided inside the diverter pipe 412, a plurality of silencer holes are provided on the diverter inner pipe, silencer cotton 45 is provided between the diverter pipe 412 and the diverter inner pipe, and a plurality of diverter holes 413 are opened on the diverter pipe 412 and the diverter inner pipe.

[0037] The working principle and beneficial effects of the above technical solution are as follows: the wind flow entering from the air inlet 411 continues to enter the diversion pipe 412, and the multiple diversion holes 413 on the diversion pipe 412 divide the wind flow into multiple streams and then enter the air inlet outer pipe 41. The diversion method converts the kinetic energy of the wind flow into friction, thereby reducing the noise generated by the wind flow. The principles of the silencer holes and the sound insulation cotton 13 further eliminate the noise as described above. The multiple silencer holes arranged on the silencer inner tube 44 increase the friction between the wind flow and the hole wall, convert the sound wave energy of the wind flow into heat energy, further reducing the noise, and the sound insulation cotton 45 further absorbs the generated noise.

[0038] Example 4

[0039] On the basis of Example 3, Figure 1-Figure 3As shown, a cartridge 421 for inserting the other end of the air inlet outer pipe 41 is fixedly provided on the inner wall of the air duct 42, and fixing plates 422 are fixedly provided on the outer walls of the air inlet outer pipe 41, the air duct 42, and the air outlet outer pipe 43, respectively. The fixing plates 422 attached to each other are fixed by bolts, and the top of the fixing plates 422 is an inclined surface.

[0040] The working principle and beneficial effects of the above technical solution are as follows: the air inlet outer tube 41, the air passage duct 42 and the air outlet outer tube 43 fix the fixing plate 422, the air inlet outer tube 41, the air passage duct 42 and the air outlet outer tube 43 are respectively aligned with each other, one end of the air inlet outer tube 41 is inserted into the cartridge 421 to strengthen the connection between the air inlet outer tube 41 and the air passage duct 42, the fixing plates 422 are fixed to each other by bolts, the air duct, the air passage duct 42 and the air outlet outer tube 43 are fixed and assembled, and the inclined surface on the top of the fixing plate 422 reduces the resistance generated when the wind blows through, and prevents the increase of the drag and noise.

[0041] Example 5

[0042] On the basis of Example 4, Figure 1-Figure 3 As shown, connecting columns 3 are fixedly provided on the upper, lower, left and right outer walls of the air duct 42, and a plug plate 31 is provided on the other end of the connecting column 3. One end of the limiting frame 2 is fixedly connected to the inner wall of the exhaust inner pipe 12, and the other end of the limiting frame 2 is provided with a half slot 21 on the side facing the air inlet 411, and the plug plate 31 is inserted in the half slot 21.

[0043] The working principle and beneficial effects of the above technical solution are as follows: the outer wall of the air duct 42 fixes and supports the connecting column 3, the exhaust inner pipe 12 fixes and supports the limit frame 2, the plug-in plate 31 on the connecting column 3 is inserted into the half-slot 21, and the plug-in plate 31 is inserted into the groove opened in the half-slot 21 in the direction of the airflow entering. The plug-in plate 31 is more effectively fixed while facilitating the disassembly and assembly of the silencer module, and the wind force of the airflow further fixes the plug-in plate 31 in the half-slot 21.

[0044] Example 6

[0045] On the basis of Example 5, Figure 1-Figure 3As shown, a mounting groove 423 is provided at the top of the air duct 42, a bottom groove 424 is provided at the bottom of the inner wall of the air duct 42, a filter plate 425 is inserted in the mounting groove 423 and the bottom groove 424, a locking groove 426 is provided at the top of the filter plate 425, and a rotating plate 427 is rotatably provided at the top of the air duct 42, and the rotating plate 427 is rotatably inserted in the locking groove 426. The working principle and beneficial effects of the above technical solution are as follows: the filter plate 425 filters the passing wind flow, filters out a part of the impurities and dust, protects the subsequent processes, and the filtered dust and impurities further silence the noise. When the dust and impurities accumulate for a period of time, the silencer module is disassembled and cleaned. The mounting groove 423 and the bottom groove 424 respectively limit and fix the upper and bottom of the filter plate 425, which facilitates the disassembly, assembly and replacement of the filter plate 425. The rotating plate 427 is set in the locking groove 426, and the rotating plate 427 further limits the filter plate 425 to prevent the filter plate 425 from being pulled out from the top.

[0046] Example 7

[0047] On the basis of Example 6, the invention further comprises:

[0048] A speed measurement module, used to measure the wind speed in the muffler module 4;

[0049] An alarm module, provided in each silencing module, for sounding an alarm;

[0050] The area division module numbers each muffler module arranged in an array and the alarm module therein accordingly;

[0051] A calculation module 1 is used to calculate the resonance frequency of the silencer module 4 during silence based on the wind flow velocity in the silencer module 4;

[0052] A processing module, used for comparing the resonance frequency of the muffler module 4 during muffler operation obtained by the calculation module 1 with the rated resonance frequency of the muffler module 4;

[0053] The control module, when the resonance frequency of a certain silencer module 4 during silencer is greater than or equal to the rated resonance frequency of the silencer module 4, the alarm module in the silencer module 4 sounds an alarm; when the resonance frequency of a certain silencer module 4 during silencer is less than the rated resonance frequency of the silencer module 4, the silencer module 4 works normally.

[0054] The working principle and beneficial effects of the above technical solution are as follows: the speed measurement module is used to measure the wind speed in the silencer module 4, the alarm module is arranged in each silencer module for issuing an alarm, the area division module corresponds to the number of each silencer module arranged in an array and the alarm module therein, the calculation module 1 is used to calculate the resonance frequency of the silencer module 4 during silencing based on the wind speed in the silencer module 4, the processing module is used to compare the resonance frequency of the silencer module 4 during silencing obtained by the calculation module 1 with the rated resonance frequency of the silencer module 4, when the resonance frequency of a silencer module 4 during silencing is greater than or equal to the rated resonance frequency of the silencer module 4, the alarm module in the silencer module 4 issues an alarm, and when the resonance frequency of a silencer module 4 during silencing is less than the rated resonance frequency of the silencer module 4, the silencer module 4 works normally.

[0055] Example 8

[0056] Based on Example 7, the calculation module 1 calculates based on the following formula 1:

[0057]

[0058] f1 is the resonance frequency of the silencer module 4 during silencing, v is the wind speed in the silencer module 4 detected by the speed measurement module, π is the pi, L is the length between the air inlet 411 and the air outlet 431, d1 is the diameter of the silencer hole on the silencer inner cylinder 44, σ is the perforation rate of the silencer inner cylinder 44, n is the number of silencer holes on the silencer inner cylinder 44, r1 is the inner diameter of the air duct 42, and D is the thickness of the silencer inner cylinder 44.

[0059] The working principle and beneficial effects of the above technical solution are: The resonant frequency of the silencer module during silence is calculated. When the resonant frequency of a silencer module during silence is greater than or equal to the rated resonant frequency of the silencer module, the alarm module in the silencer module sounds an alarm. When the resonant frequency of a silencer module during silence is less than the rated resonant frequency of the silencer module, the silencer module works normally.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An array type muffler used in a ventilation system, characterized in that: include: A plurality of silencer modules (4), wherein the plurality of silencer modules (4) are arranged in an array in an exhaust pipe (1) via a limiting frame (2), wherein the exhaust pipe (1) comprises an exhaust outer pipe (11) and an exhaust inner pipe (12), wherein the exhaust inner pipe (12) is provided with a plurality of silencer holes, and sound insulation cotton (13) is arranged between the exhaust outer pipe (11) and the exhaust inner pipe (12).

2. The array muffler used in a ventilation system according to claim 1, characterized in that: The silencer module (4) comprises an air inlet outer tube (41), one end of the air inlet outer tube (41) is an air inlet (411), the other end of the air inlet outer tube (41) is connected and communicated with one end of an air passage tube (42), the other end of the air passage tube (42) is connected and communicated with one end of an air outlet outer tube (43), the other end of the air outlet outer tube (43) is provided with an air outlet (431), the inner sides of the air inlet outer tube (41), the air passage tube (42) and the air outlet outer tube (43) are respectively provided with silencer inner tubes (44), a plurality of silencer holes are provided on the silencer inner tube (44), and silencer cotton (45) is provided between the air inlet outer tube (41), the air passage tube (42), the air outlet outer tube (43) and the silencer inner tube (44).

3. The array muffler used in a ventilation system according to claim 2, characterized in that: A diverter pipe (412) is provided at the air inlet (411), a diverter inner pipe is provided inside the diverter pipe (412), a plurality of silencer holes are provided on the diverter inner pipe, silencer cotton (45) is provided between the diverter pipe (412) and the diverter inner pipe, and a plurality of diverter holes (413) are provided on the diverter pipe (412) and the diverter inner pipe.

4. The array muffler used in a ventilation system according to claim 3, characterized in that: A cartridge (421) for inserting the other end of the air inlet outer pipe (41) is fixedly arranged on the inner wall of the air passage duct (42), and fixing plates (422) are fixedly arranged on the outer walls of the air inlet outer pipe (41), the air passage duct (42), and the air outlet outer pipe (43), respectively. The fixing plates (422) abutting against each other are fixed by bolts, and the top of the fixing plates (422) is an inclined surface.

5. The array muffler used in a ventilation system according to claim 4, characterized in that: The outer wall of the air duct (42) is fixedly provided with connecting columns (3) at the top, bottom, left and right sides respectively, and a plug plate (31) is provided on the other end of the connecting column (3). One end of the limiting frame (2) is fixedly connected to the inner wall of the exhaust inner pipe (12), and the other end of the limiting frame (2) is provided with a half slot (21) on the side facing the air inlet (411), and the plug plate (31) is inserted in the half slot (21).

6. The array muffler used in a ventilation system according to claim 5, characterized in that: The top of the air duct (42) is provided with a mounting groove (423), the bottom of the inner wall of the air duct (42) is provided with a bottom groove (424), a filter plate (425) is inserted in the mounting groove (423) and the bottom groove (424), a locking groove (426) is provided at the top of the filter plate (425), and a rotating plate (427) is rotatably provided at the top of the air duct (42), and the rotating plate (427) is rotatably inserted in the locking groove (426).

7. The array muffler used in a ventilation system according to claim 6, characterized in that: Also includes: A velocity measurement module, used to measure the wind flow velocity in the silencer module (4); An alarm module, provided in each silencing module, for sounding an alarm; The area division module numbers each muffler module arranged in an array and the alarm module therein accordingly; A calculation module 1, used for calculating the resonance frequency of the silencer module (4) during silence based on the wind flow velocity in the silencer module (4); A processing module, used for comparing the resonance frequency of the muffler module (4) during muffler operation obtained by the calculation module 1 with the rated resonance frequency of the muffler module (4); The control module is configured such that when the resonance frequency of a certain silencer module (4) during silence is greater than or equal to the rated resonance frequency of the silencer module (4), the alarm module in the silencer module (4) sounds an alarm; when the resonance frequency of a certain silencer module (4) during silence is less than the rated resonance frequency of the silencer module (4), the silencer module (4) operates normally.

8. A wall-clad superheater according to claim 7, characterized in that: The calculation module 1 calculates based on the following formula 1: f1 is the resonance frequency of the silencer module (4) when silencing, v is the wind flow velocity in the silencer module (4) detected by the velocity measurement module, π is the pi, L is the length between the air inlet (411) and the air outlet (431), d1 is the diameter of the silencer hole on the silencer inner cylinder (44), σ is the perforation rate of the silencer inner cylinder (44), n is the number of silencer holes on the silencer inner cylinder (44), r1 is the inner diameter of the air duct (42), and D is the thickness of the silencer inner cylinder (44).

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