Air pipe silencer

Abstract

The utility model relates to the technical field of pipeline silencing, in particular to an air pipe silencer which comprises a hollow shell, an access door is hinged to the front side of the shell, notches are formed in the other three inner walls of the shell respectively, a silencing assembly is arranged in each side wall of the shell, and the inner wall of each silencing assembly is provided with an air inlet. The silencing assembly is composed of an inner hole plate, an outer hole plate and a cavity composed of the inner hole plate and the outer hole plate, and first silencing cotton is arranged in the cavity. A plurality of silencing columns distributed in a display mode are arranged in the shell, a plurality of fixing frames are arranged at the upper end and the lower end in the shell respectively, the two ends of each silencing column are fixed to the fixing frames at the two ends through bolts respectively, the lower end of the shell is connected with a lower variable-diameter flange, and the lower variable-diameter flange is connected with an air pipe. The silencer has the advantages that the silencing effect is good, and the silencing material is convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline silencers, in particular to an air duct silencer. Background Art

[0002] In the prior art, an air duct muffler is usually arranged on the main ventilation duct to reduce the noise of the airflow while allowing the airflow to pass through. The existing air duct muffler usually has only one airflow channel. When the airflow flows from the air inlet of the air duct muffler to the air outlet of the air duct muffler, the noise of the airflow is reduced by the sound-absorbing material arranged on the inner wall of the air duct muffler to achieve the purpose of controlling the noise. However, after the existing air duct muffler is used for a long time, the dust in the airflow will adhere to the internal muffler material, thereby affecting the muffler effect of the muffler mechanism. Utility Model Content

[0003] In order to solve the above technical problems, the utility model specifically adopts the following technical solutions.

[0004] A duct silencer is designed, comprising a hollow shell, an inspection door is hinged on the front side of the shell, notches are respectively opened on the other three inner walls of the shell, and a silencer component is respectively arranged inside each side wall of the shell, the silencer component is composed of an inner orifice plate and an outer orifice plate and a cavity formed by the two, and a silencer cotton is arranged in the cavity;

[0005] A plurality of silencer columns are arranged in an array in the shell, and a plurality of fixing frames are respectively arranged at the upper and lower ends of the shell. Both ends of the silencer column are respectively fixed to the fixing frames at both ends by bolts. A lower reducing flange is connected to the lower end of the shell, and the lower reducing flange is connected to the air duct.

[0006] Preferably, support columns are respectively connected to both sides of the top of the shell, and a sound-absorbing rainproof cover is provided on the top of the support column.

[0007] Preferably, a V-shaped perforated plate is connected to the middle inner wall of the sound-absorbing rainproof cover, a plurality of air holes are opened on the perforated plate, and a sound-absorbing cotton is provided between the perforated plate and the sound-absorbing rainproof cover.

[0008] Preferably, conical flow diverters are respectively provided at both ends of the muffler column.

[0009] Preferably, the silencer column comprises an outer cylindrical shell and silencer cotton located inside the cylindrical shell, and the cylindrical shell is surrounded by a vent plate.

[0010] Preferably, the first, second and third sound-absorbing cottons are all ultra-fine glass fiber cottons, and the ultra-fine glass fiber cottons are wrapped by glass fiber cloth.

[0011] Preferably, an opening for pulling out the silencer assembly is respectively provided at the bottom of each side wall of the shell, a baffle is respectively hinged at the opening and at the lower end of each outer wall of the shell, a pan head scimitar lock is respectively provided at the bottom of the baffle, a locking nose cooperating with the pan head scimitar lock is provided on the lower reducing flange, and the baffle is locked to the lower reducing flange through the cooperation of the pan head scimitar lock and the locking nose.

[0012] Preferably, an upper reducing flange is connected to the top of the shell.

[0013] The beneficial effects of the utility model are:

[0014] The utility model adopts a method of arranging a sound-absorbing cotton in a cavity formed between an inner orifice plate and an outer orifice plate that are interlocked with each other, so that the sound-absorbing cotton can be easily replaced; an inspection door is hinged on the front side of the shell, and sound-absorbing material with the same structure as the inner side of the shell side wall is also arranged on the inner side of the inspection door. By opening the inspection door, the sound-absorbing columns in the shell can be easily disassembled layer by layer, so as to avoid a large amount of dust adhering to the sound-absorbing material due to long-term use, thereby affecting the sound-absorbing effect; and the sound-absorbing columns are distributed in the shell in an array, and circular diverter heads are provided at both ends, so as to reduce the resistance of airflow; the noise generated by the airflow is respectively silenced by sound-absorbing cotton one, sound-absorbing cotton two, and sound-absorbing cotton three, so that the sound-absorbing effect is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the installation structure of the silencer column;

[0018] Figure 4 It is a schematic diagram of the structure of the muffler column;

[0019] Figure 5 This is a schematic diagram of the structure after the sound-absorbing material in the inspection door is pulled out;

[0020] Figure 6 It is a schematic diagram of the structure in which the sound-absorbing material inside the shell is pulled out;

[0021] Figure 7 yes Figure 2 A is an enlarged structural diagram;

[0022] Figure 8 yes Figure 6 A is an enlarged structural diagram;

[0023] Fig. 9 It is a structural schematic diagram of another embodiment of the utility model;

[0024] The numbers in the figure are: 1 silencer rain cover, 2 support column, 3 shell, 31 outer orifice plate, 32 silencer cotton one, 33 inner orifice plate, 4 pan head machete lock, 5 lower reducer flange, 6 silencer column, 60 fiberglass cloth, 61 cylindrical shell, 62 silencer cotton three, 63 diverter head, 64 fixed head, 7 silencer cotton two, 8 fixed frame, 9 perforated plate, 10 inspection door, 101 installation port, 102 through port, 11 upper reducer flange, 12 limit door stop, 13 baffle, 14 opening, 16 lock nose, 17 notch, 18 opening. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] Example 1

[0027] A duct muffler, such as Figures 1 to 9 As shown, it includes a hollow shell 3, an inspection door 10 is hinged on the front side of the shell 3, and notches 17 are respectively provided on the other three inner walls of the shell 3. A silencer component is respectively provided inside each side wall of the shell 3. The silencer component is composed of an inner orifice plate 33 and an outer orifice plate 31 and a cavity formed by the two being buckled together, and a silencer cotton 32 is provided in the cavity; a through opening 102 is provided on the inner wall of the inspection door 10, and a mounting opening 101 is provided on one side of the inspection door 10 hinged to the shell 3. A silencer component with the same internal structure as the shell 3 is clamped inside the shell 3, that is, the inner orifice plate 33 and the outer orifice plate 31 are buckled, and the inner cavity is filled with silencer cotton 32, and a limit door stop 12 is provided on the inner wall of the shell 3. The silencer component in the inspection door 10 can be disassembled and assembled from the mounting opening 101;

[0028] An opening 14 for pulling out the silencer assembly is provided at the bottom of each side wall of the shell 3, and a baffle 13 is hinged at the opening 14 and at the lower end of each outer wall of the shell 3. A pan-head scimitar lock 4 is provided at the bottom of the baffle 13, and a locking nose 16 cooperating with the pan-head scimitar lock 4 is provided on the lower reducing flange 5. The baffle 13 is locked on the lower reducing flange 5 through the pan-head scimitar lock 4 and the locking nose 16.

[0029] By opening the pan-head curved knife lock 4, the baffle 13 can be opened, so that the sound-absorbing material can be drawn out from the inside of the shell 3, and the inner orifice plate 33 and the outer orifice plate 31 are interlocked and fixed by bolts. The bolts at the lower ends of the inner orifice plate 33 and the outer orifice plate 31 can be fixed with back-welded nuts on the inner wall of the inner orifice plate, so that the bolts are tightened and fixed in the back-welded nuts. By removing the bolts, the inner orifice plate 33 and the outer orifice plate 31 can be disassembled, thereby facilitating the replacement of the sound-absorbing cotton 32.

[0030] A plurality of silencer columns 6 are arranged in a display arrangement in the shell 3, and a plurality of fixing frames 8 are respectively arranged at the upper and lower ends of the shell 3. The two ends of the silencer column 6 are connected to the fixing heads 64, and the two ends of the silencer column 6 are respectively fixed to the fixing frames 8 at the two ends by bolts through the fixing heads 64. A lower reducing flange 5 is connected to the lower end of the shell 3, and the lower reducing flange 5 is connected to the air duct. Conical diverter heads 63 are respectively arranged at the two ends of the silencer column 6, and the circular diverter heads 63 arranged in an array have less resistance when the airflow passes through; the silencer column 6 includes an outer cylindrical shell 61 and silencer cotton three 62 located in the cylindrical shell 61, and the cylindrical shell 61 is surrounded by a vent plate. Silencing cotton one 32, silencer cotton two 7, and silencer cotton three 62 are all ultra-fine glass fiber cotton, and the ultra-fine glass fiber cotton is wrapped by glass fiber cloth 60.

[0031] By opening the inspection door 10 , the muffler column 6 can be removed from the fixing frame 8 layer by layer.

[0032] Support columns 2 are connected to both sides of the top of the shell 3, and a sound-absorbing rain cover 1 is provided on the top of the support columns 2. A V-shaped perforated plate 9 is connected to the middle inner wall of the sound-absorbing rain cover 1, and a plurality of air holes are opened on the perforated plate 9. A sound-absorbing cotton 7 is provided between the perforated plate 9 and the sound-absorbing rain cover 1.

[0033] In the above embodiments, part of the airflow noise passing through the air duct is absorbed by the silencer column 6, and the other part is absorbed and reduced by the silencer cotton 32 in the shell 3 and the inspection door 10. After the noise reduction, part of the airflow diffuses outward, and part of it is absorbed again by the silencer cotton 7 through the perforated plate 9. After multiple silencer and noise reduction treatments, the silencer effect of the airflow in the air duct can be further improved.

[0034] Example 2

[0035] A duct muffler, such as Figure 3 As shown, the difference from the first embodiment is that an upper reducing flange 11 is connected to the top of the shell 3. The airflow noise passing through the air duct is absorbed and reduced by the muffler column 6 and the muffler cotton 32 in the shell 3 and then discharged through the upper reducing flange 11.

[0036] Finally, it should be noted that the above is only 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, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A duct muffler, characterized in that: The invention comprises a hollow shell (3), an inspection door (10) is hingedly connected to the front side of the shell (3), notches (17) are respectively provided on the three inner walls of the shell (3), a silencer assembly is respectively provided inside each side wall of the shell (3), the silencer assembly is composed of an inner hole plate (33) and an outer hole plate (31) and a cavity formed by the two, and a silencer cotton (32) is provided in the cavity; A plurality of silencer columns (6) are arranged in an array in the shell (3), and a plurality of fixing frames (8) are respectively arranged at the upper end and the lower end of the shell (3). The two ends of the silencer column (6) are respectively fixed to the fixing frames (8) at the two ends by bolts, and a lower reducing flange (5) is connected to the lower end of the shell (3), and the lower reducing flange (5) is connected to the air duct.

2. The air duct muffler according to claim 1, characterized in that: Support columns (2) are respectively connected to both sides of the top of the shell (3), and a sound-absorbing rainproof cover (1) is provided on the top of the support column (2).

3. The air duct muffler according to claim 2, characterized in that: A V-shaped perforated plate (9) is connected to the middle inner wall of the noise-absorbing rainproof cover (1), a plurality of air holes are provided on the perforated plate (9), and a second sound-absorbing cotton (7) is provided between the perforated plate (9) and the noise-absorbing rainproof cover (1).

4. The air duct muffler according to claim 1, characterized in that: Conical flow dividers (63) are respectively provided at both ends of the muffler column (6).

5. The air duct muffler according to claim 3, characterized in that: The muffler column (6) comprises an outer cylindrical shell (61) and muffler cotton three (62) located inside the cylindrical shell (61), and the cylindrical shell (61) is surrounded by a vent plate.

6. The air duct muffler according to claim 5, characterized in that: The first sound-absorbing cotton (32), the second sound-absorbing cotton (7), and the third sound-absorbing cotton (62) are all ultra-fine glass fiber cottons, and the ultra-fine glass fiber cottons are wrapped by glass fiber cloth (60).

7. The air duct muffler according to claim 1, characterized in that: An opening (14) for withdrawing a silencer assembly is provided at the bottom of each side wall of the shell (3), a baffle (13) is hinged at the opening (14) and at the lower end of each outer wall of the shell (3), a pan-head scimitar lock (4) is provided at the bottom of each baffle (13), a locking nose (16) cooperating with the pan-head scimitar lock (4) is provided on the lower reducing flange (5), and the baffle (13) is locked on the lower reducing flange (5) through the cooperation of the pan-head scimitar lock (4) and the locking nose (16).

8. The air duct muffler according to claim 1, characterized in that: An upper reducing flange (11) is connected to the top of the housing (3).

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