Silencer for pipeline fan

Abstract

The utility model discloses a silencer for a pipeline fan, which belongs to the technical field of pipeline fan silencing, aims at solving the problems that noise generated by the pipeline fan cannot be completely eliminated and the silencing effect is poor, and comprises a pipeline, a fan is fixed on one side of the pipeline, a first outer cover is arranged on one side of the outer side wall of the pipeline, and a second outer cover is arranged on the other side of the outer side wall of the pipeline. A plurality of evenly-distributed inclined rings are fixed to the side faces, close to the pipeline, of the inner side walls of the first outer cover and the second outer cover. Noise can be secondarily absorbed through the arranged glass fiber cotton, and the noise can be fully absorbed by the first sound absorption cotton ring, the second sound absorption cotton ring and the glass fiber cotton by arranging the sound absorption positions of the first sound absorption cotton ring, the second sound absorption cotton ring and the glass fiber cotton to be wave-shaped. And by arranging the sponge and the deadening felt, the noise can be finally absorbed, so that the noise generated by the fan can be completely eliminated, and the noise elimination effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of silencing of duct fans, and particularly relates to a silencer for a duct fan. Background Art

[0002] When the existing silencer for a duct fan is in use, usually only one silencing structure is provided. When the noise of the duct fan is relatively large, the silencer cannot completely eliminate the noise, resulting in relatively large noise still existing near the duct, with poor silencing effect. The uneliminated noise is likely to cause damage to the hearing of nearby workers.

[0003] Therefore, an air compressor intake valve silencing device is needed to solve the problems in the prior art that the noise generated by the duct fan cannot be completely eliminated and the silencing effect is poor. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a silencer for a duct fan to solve the problems put forward in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A silencer for a duct fan, including a duct, a fan is fixed on one side of the duct, a first outer cover is arranged on one side of the outer side wall of the duct, a second outer cover is arranged on the other side of the outer side wall of the duct. A number of uniformly distributed inclined rings are fixed on the inner side walls of the first outer cover and the second outer cover close to the side of the duct. A first sound-absorbing cotton ring is fixed on one side surface of the inclined ring, and a second sound-absorbing cotton ring is fixed on the other side surface of the inclined ring. Glass fiber cotton is fixed between the inner side walls of the first outer cover and the second outer cover close to each other. Sound insulation felt is fixed on the inner side walls of the first outer cover and the second outer cover far from the duct, and a sponge is fixed on one side surface of the sound insulation felt.

[0006] It should be noted in the solution that two positioning frames are respectively fixed on the top and bottom of the outer side wall of the first outer cover, two arc-shaped boxes are respectively fixed on the top and bottom of the outer side wall of the second outer cover, a first positioning plate is movably clamped in the arc-shaped box, and an arc-shaped rack is fixed on one side surface of the first positioning plate, and the arc-shaped rack passes through the arc-shaped box.

[0007] Further, it is worth noting that an installation box is fixed on one side surface of the inner side wall of the positioning frame, a second positioning plate is movably clamped in the installation box, a contact tooth is fixed on one side surface of the second positioning plate, and the contact tooth is engaged with the corresponding arc-shaped rack.

[0008] Furthermore, it is worth noting that two limiting columns are fixed on one side surface of the inner side wall of the positioning frame, one end of the limiting column penetrates into the second positioning plate and the contact tooth, and a spring is arranged on the outer side wall of the limiting column.

[0009] As a preferred embodiment, fixing blocks are respectively fixed at the top and bottom of both sides of the outer side wall of the second outer cover, fixing sleeves are respectively fixed at the top and bottom of both sides of the outer side wall of the first outer cover, a positioning column is fixed on one side surface of the fixing block, and the positioning column movably passes through the fixing sleeve.

[0010] Compared with the prior art, a silencer for a pipeline fan provided by the utility model has at least the following beneficial effects:

[0011] (1) Through the arranged first sound-absorbing cotton ring and second sound-absorbing cotton ring, the noise in the pipeline is initially absorbed. Through the arranged glass fiber cotton, the noise can be absorbed secondly. By setting the sound-absorbing positions of the first sound-absorbing cotton ring, the second sound-absorbing cotton ring and the glass fiber cotton to be wavy, the noise can be fully absorbed by the first sound-absorbing cotton ring, the second sound-absorbing cotton ring and the glass fiber cotton. Through the arranged sponge and sound insulation felt, the noise can be finally absorbed, so that the noise generated by the fan can be completely eliminated, and the noise elimination effect is improved.

[0012] (2) Through the arranged fixing sleeve and positioning column, the first outer cover and the second outer cover can be initially connected. Through the arranged arc-shaped box, arc-shaped rack, contact teeth and spring, the first outer cover and the second outer cover can be stably connected together, so that the first outer cover and the second outer cover can be quickly connected together, and the installation efficiency of the first outer cover and the second outer cover is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 is of the utility model Figure 1 partial enlarged structural schematic diagram of A therein;

[0015] Figure 3 is a schematic diagram of the arc-shaped rack structure of the utility model;

[0016] Figure 4 is a schematic diagram of the side view of the contact teeth of the utility model;

[0017] Figure 5 is a schematic diagram of the sectional view of the positioning frame of the utility model;

[0018] Figure 6 is a schematic diagram of the second outer cover structure of the utility model;

[0019] Figure 7 is of the utility model Figure 6 partial enlarged structural schematic diagram of B therein;

[0020] Figure 8 is a schematic diagram of the first sound-absorbing cotton ring structure of the utility model;

[0021] Figure 9 This is a schematic diagram of the glass fiber cotton structure of the present utility model.

[0022] In the figure:

[0023] 100, pipeline; 101, first outer cover; 102, second outer cover; 103, inclined ring; 104, first sound-absorbing cotton ring; 105, second sound-absorbing cotton ring; 106, fan;

[0024] 200, glass fiber cotton; 201, sponge; 202, sound insulation felt;

[0025] 300, fixing block; 301, fixing sleeve; 302, positioning column;

[0026] 400, arc-shaped box; 401, first positioning plate; 402, arc-shaped rack;

[0027] 500, positioning frame; 501, installation box; 502, contact tooth; 503, second positioning plate; 504, spring; 505, limit column. Detailed implementation manners

[0028] Please refer to Figures 1-9 , the present utility model provides a silencer for a pipeline fan, including a pipeline 100, a fan 106 is fixed on one side of the pipeline 100, a first outer cover 101 is arranged on one side of the outer side wall of the pipeline 100, a second outer cover 102 is arranged on the other side of the outer side wall of the pipeline 100, a plurality of uniformly distributed inclined rings 103 are fixed on the inner side wall of the first outer cover 101 and the second outer cover 102 close to one side of the pipeline 100, a first sound-absorbing cotton ring 104 is fixed on one side surface of the inclined ring 103, a second sound-absorbing cotton ring 105 is fixed on the other side surface of the inclined ring 103, a glass fiber cotton 200 is fixed between the inner side walls of the first outer cover 101 and the second outer cover 102 close to each other, a sound insulation felt 202 is fixed on the inner side wall of the first outer cover 101 and the second outer cover 102 far from the pipeline 100, and a sponge 201 is fixed on one side surface of the sound insulation felt 202.

[0029] Furthermore, as shown in Figure 1 and Figure 3 , two positioning frames 500 are respectively fixed on the top and bottom of the outer side wall of the first outer cover 101, two arc-shaped boxes 400 are respectively fixed on the top and bottom of the outer side wall of the second outer cover 102, a first positioning plate 401 is movably clamped in the arc-shaped box 400, an arc-shaped rack 402 is fixed on one side surface of the first positioning plate 401, and the arc-shaped rack 402 passes through the arc-shaped box 400.

[0030] Through the provided arc-shaped box 400 and arc-shaped rack 402, the arc-shaped rack 402 can be engaged with the contact teeth 502 within the positioning frame 500, thereby connecting the first outer cover 101 and the second outer cover 102 together.

[0031] This solution has the following working process: When connecting the first outer cover 101 and the second outer cover 102 to the pipeline 100, first, the first outer cover 101 and the second outer cover 102 are sleeved on the pipeline 100, and the positioning posts 302 are engaged with the fixed sleeves 301. At this time, the first outer cover 101 and the second outer cover 102 are initially connected. Then, by manually pushing the four arc-shaped racks 402 respectively until the arc-shaped racks 402 are engaged with the corresponding contact teeth 502, the first outer cover 101 and the second outer cover 102 are stably connected together.

[0032] When eliminating the noise inside the pipeline 100, when the fan 106 is started, the fan 106 injects air into the pipeline 100. The noise enters the pipeline 100. When it reaches the positions of the first outer cover 101 and the second outer cover 102, the noise passes through the inclined ring 103 and is initially absorbed by the first sound-absorbing cotton ring 104 and the second sound-absorbing cotton ring 105. Then, the noise is secondarily absorbed by the fiberglass wool 200. Some of the noise that is not completely absorbed is finally absorbed by the sponge 201 and the sound insulation felt 202, so that the noise inside the pipeline 100 is completely absorbed.

[0033] According to the above working process, it can be seen that: through the provided first sound-absorbing cotton ring 104 and the second sound-absorbing cotton ring 105, the noise inside the pipeline 100 is initially absorbed. Through the provided fiberglass wool 200, the noise can be secondarily absorbed. By setting the sound-absorbing positions of the first sound-absorbing cotton ring 104, the second sound-absorbing cotton ring 105, and the fiberglass wool 200 to be wavy, the noise can be fully absorbed by the first sound-absorbing cotton ring 104, the second sound-absorbing cotton ring 105, and the fiberglass wool 200. Through the provided sponge 201 and the sound insulation felt 202, the noise can be finally absorbed, so that the noise generated by the fan 106 can be completely eliminated, improving the noise elimination effect.

[0034] Through the provided fixed sleeves 301 and positioning posts 302, the first outer cover 101 and the second outer cover 102 can be initially connected. Through the provided arc-shaped box 400, arc-shaped racks 402, contact teeth 502, and springs 504, the first outer cover 101 and the second outer cover 102 can be stably connected together, so that the first outer cover 101 and the second outer cover 102 can be quickly connected together, improving the installation efficiency of the first outer cover 101 and the second outer cover 102.

[0035] Further, as Figure 5As shown, on one side of the inner side wall of the positioning frame 500, a mounting box 501 is fixed. A second positioning plate 503 is movably engaged in the mounting box 501. On one side of the second positioning plate 503, a contact tooth 502 is fixed, and the contact tooth 502 is engaged with the corresponding arc-shaped rack 402.

[0036] By providing the mounting box 501 and the second positioning plate 503, the position of the contact tooth 502 can be limited, thereby facilitating the engagement between the contact tooth 502 and the arc-shaped rack 402.

[0037] Furthermore, as Figure 5 shown, on one side of the inner side wall of the positioning frame 500, two limit posts 505 are fixed. One end of the limit post 505 penetrates into the second positioning plate 503 and the contact tooth 502, and a spring 504 is arranged on the outer side wall of the limit post 505.

[0038] By providing the spring 504, the contact tooth 502 can be conveniently engaged with the arc-shaped rack 402, thereby connecting the first outer cover 101 and the second outer cover 102 together.

[0039] Furthermore, as Figure 2 shown, on the top and bottom of both sides of the outer side wall of the second outer cover 102, fixing blocks 300 are respectively fixed. On the top and bottom of both sides of the outer side wall of the first outer cover 101, fixing sleeves 301 are respectively fixed. On one side of the fixing block 300, a positioning post 302 is fixed, and the positioning post 302 movably passes through the fixing sleeve 301.

[0040] By providing the positioning post 302 and the fixing sleeve 301, the first outer cover 101 and the second outer cover 102 can be preliminarily connected.

[0041] In summary: When connecting the first outer cover 101 and the second outer cover 102 to the pipeline 100, first, the first outer cover 101 and the second outer cover 102 are sleeved on the pipeline 100, and the positioning post 302 is engaged with the fixing sleeve 301. At this time, the first outer cover 101 and the second outer cover 102 are preliminarily connected. Then, by manually pushing the four arc-shaped racks 402 respectively until the arc-shaped racks 402 are engaged with the corresponding contact teeth 502, at this time, the first outer cover 101 and the second outer cover 102 are stably connected together.

[0042] When eliminating the noise in the pipeline 100, when the fan 106 starts, the fan 106 injects air into the pipeline 100. When the noise enters the pipeline 100 and reaches the positions of the first outer cover 101 and the second outer cover 102, the noise passes through the inclined ring 103 and is preliminarily absorbed by the first sound-absorbing cotton ring 104 and the second sound-absorbing cotton ring 105. Then, the noise is secondarily absorbed by the fiberglass cotton 200, and the partially unabsorbed noise is finally absorbed by the sponge 201 and the sound insulation felt 202, so that the noise in the pipeline 100 is completely absorbed.

[0043] The fan 106, the fiberglass cotton 200 and the sound insulation felt 202 can be purchased on the market, which are mature technologies in this field and have been fully disclosed, so they will not be repeated in the specification.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A silencer for a duct fan, comprising a duct (100), characterized in that, A blower (106) is fixed to one side of the pipeline (100). A first outer cover (101) is arranged on one side of the outer side wall of the pipeline (100), and a second outer cover (102) is arranged on the other side of the outer side wall of the pipeline (100). A number of uniformly distributed inclined rings (103) are fixed to the inner side walls of the first outer cover (101) and the second outer cover (102) close to one side of the pipeline (100). A first sound-absorbing cotton ring (104) is fixed to one side of the inclined ring (103), and a second sound-absorbing cotton ring (105) is fixed to the other side of the inclined ring (103). Glass fiber cotton (200) is fixed between the inner side walls of the first outer cover (101) and the second outer cover (102) close to each other. Sound insulation felt (202) is fixed to the inner side walls of the first outer cover (101) and the second outer cover (102) away from one side of the pipeline (100), and a sponge (201) is fixed to one side of the sound insulation felt (202).

2. The silencer for a duct fan according to claim 1, wherein: Two positioning frames (500) are respectively fixed to the top and bottom of the outer side wall of the first outer cover (101). Two arc-shaped boxes (400) are respectively fixed to the top and bottom of the outer side wall of the second outer cover (102). A first positioning plate (401) is movably clamped in the arc-shaped box (400), and an arc-shaped rack (402) is fixed to one side of the first positioning plate (401). The arc-shaped rack (402) passes through the arc-shaped box (400).

3. The silencer for a duct fan according to claim 2, characterized in that: An installation box (501) is fixed to one side of the inner side wall of the positioning frame (500). A second positioning plate (503) is movably clamped in the installation box (501), and a contact tooth (502) is fixed to one side of the second positioning plate (503). The contact tooth (502) is engaged with the corresponding arc-shaped rack (402).

4. The silencer for a duct fan according to claim 3, wherein: Two limiting columns (505) are fixed to one side of the inner side wall of the positioning frame (500). One end of the limiting column (505) penetrates into the second positioning plate (503) and the contact tooth (502), and a spring (504) is arranged on the outer side wall of the limiting column (505).

5. The silencer for a duct fan according to claim 4, characterized in that: Fixing blocks (300) are respectively fixed to the top and bottom of both sides of the outer side wall of the second outer cover (102). Fixing sleeves (301) are respectively fixed to the top and bottom of both sides of the outer side wall of the first outer cover (101). A positioning column (302) is fixed to one side of the fixing block (300), and the positioning column (302) movably passes through the fixing sleeve (301).

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