CN215260510U

CN215260510U - Drum-type wall ventilation silencer

Info

Publication number: CN215260510U
Application number: CN202120239923.8U
Authority: CN
Inventors: 周万亩; 赵纯真; 李勇; 林伟
Original assignee: Anhui Dongsheng Environmental Protection Technology Group Co ltd
Current assignee: Anhui Dongsheng Environmental Protection Technology Group Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-12-21
Anticipated expiration: 2031-01-27

Abstract

The utility model discloses a drum-type wall surface ventilation silencer, which comprises a silencing box with vents at two ends, wherein an adjusting track and a silencing module which can move along the adjusting track and then be fixed are arranged in the silencing box, and the silencing modules are arranged in the silencing box in a staggered way; after entering the silencing box from the vent at one side, the sound waves are blocked by the silencing module and then spread in an arc shape and then are transmitted out from the vent at the other side. The utility model discloses a set up the regulation track in the whistle box, remove the noise elimination module to the assigned position, make the noise elimination module be the staggered arrangement in the whistle box, play the effect of blockking to the sound wave that gets into in the whistle box, make the sound wave be the arc propagation, improved the contact number of times of sound wave and noise elimination module, improved the noise reduction effect, avoided the production of "frequency channel inefficacy" phenomenon.

Description

Drum-type wall ventilation silencer

Technical Field

The utility model relates to a noise elimination field specifically is a drum-type wall ventilation silencer.

Background

In each industrial production field, there is a large amount of inside factory buildings that have high noise source to distribute, falls the engineering in-process of making an uproar and need carry out various measures of making an uproar to the factory building in implementing, for satisfying the inside all kinds of production facility ventilation heat dissipation requirements of factory building, should satisfy the ventilation and can realize absorbing the sound and fall the equipment of making an uproar such as silencer that makes an uproar in the suitable position design of factory building wall.

The existing wall ventilation silencer is a straight-through silencing channel, is generally used in the technical field of industrial noise reduction, is suitable for working conditions with the air exhaust speed being not less than 18m/s, and has the characteristics of high ventilation efficiency, low resistance and the like; however, for the ventilation silencer on the wall surface of the factory building, the air flow speed passing through the inside of the ventilation silencer is low, and the air speed is generally less than or equal to 5m/s, so even if the friction coefficient is slightly increased, the air flow resistance cannot be greatly increased. However, when a straight-through type muffling channel is adopted, when the frequency range of a noise source inside a factory building is wide in distribution (under the condition that the sound propagation speed is constant, the higher the frequency is, the shorter the sound wave is, and the lower the frequency is, the longer the sound wave is), the wavelength corresponding to the frequency range of a part of the sound wave is just in the failure frequency range of the muffler, especially, the low-frequency noise sound wave is longer, when the sound wave passes through the inside of the muffler, the contact frequency of the sound wave and a sound absorption material is few, so that the noise reduction effect is poor, and the phenomenon of 'frequency range failure' occurs, so that the problem needs to be solved urgently.

Disclosure of Invention

In order to avoid and overcome the technical problem who exists among the prior art, the utility model provides a drum-type wall ventilation silencer. The utility model discloses a set up the regulation track in the whistle box, remove the noise elimination module to the assigned position, make the noise elimination module be the staggered arrangement in the whistle box, play the effect of blockking to the sound wave that gets into in the whistle box, make the sound wave be the arc propagation, improved the contact number of times of sound wave and noise elimination module, improved the noise reduction effect, avoided the production of "frequency channel inefficacy" phenomenon.

In order to achieve the above object, the utility model provides a following technical scheme:

a drum-type wall surface ventilation silencer comprises a silencing box, wherein ventilation openings are formed in two ends of the silencing box, an adjusting track and a silencing module which can move along the adjusting track and then is fixed are arranged in the silencing box, and the silencing modules are arranged in the silencing box in a staggered mode; after entering the silencing box from the vent at one side, the sound waves are blocked by the silencing module and then spread in an arc shape and then are transmitted out from the vent at the other side.

As a further aspect of the present invention: the silencing module is a silencing roller, and the axis of the silencing roller is parallel to the ventilation opening.

As a further aspect of the present invention: the noise elimination module includes the back shaft and encircles the micropore guard plate of back shaft, it has the sound absorption intermediate layer to fill between back shaft and the micropore guard plate, the back shaft is fixed on adjusting the track.

As a further aspect of the present invention: the sound absorption interlayer is glass wool, felt or perforated plywood.

As a further aspect of the present invention: the silencing box is a rectangular box body, and the adjusting track is fixed on the box wall in the silencing box; the adjusting track is in a crisscross grid shape.

As a further aspect of the present invention: the adjusting rails are symmetrically arranged on the box walls on two sides in the sound muffling box, and two ends of the supporting shaft are respectively fixed on the two adjusting rails.

As a further aspect of the present invention: the adjusting track is provided with a positioning pin, and the silencing module is positioned on the adjusting track through the positioning pin after moving to a preset position along the adjusting track.

As a further aspect of the present invention: the positioning pin is arranged on the vertical section of the adjusting track, and the adjusting track is provided with a fixing shaft sleeve at the position corresponding to the positioning pin for the positioning pin to be inserted into; the locating pin has two working states: the positioning pin is inserted into the adjusting track to support the silencing module so as to prevent the silencing module from falling; the positioning pin is drawn out of the adjusting track to enable the noise elimination module to move normally.

As a further aspect of the present invention: and the cross intersection of the adjusting track adopts a circular arc section for smooth transition.

As a further aspect of the present invention: and the width of the support shaft of the silencing module is matched with that of the adjusting track.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a set up the regulation track in the whistle box, remove the noise elimination module to the assigned position, make the noise elimination module be the staggered arrangement in the whistle box, play the effect of blockking to the sound wave that gets into in the whistle box, make the sound wave be the arc propagation, improved the contact number of times of sound wave and noise elimination module, improved the noise reduction effect, avoided the production of "frequency channel inefficacy" phenomenon.

2. The utility model has the advantages that the silencing module is a silencing roller, and the cambered surface structure of the roller reduces the airflow resistance in the silencing box; the axis of the silencing roller is parallel to the ventilation opening, so that the silencing effect is maximized; the combined design of the silencing roller is convenient for replacing all parts inside the silencing roller.

3. The utility model fixes the crisscross grid-shaped adjusting track on the inner wall of the box body, so that each silencing roller can adjust the position along the track, and the device is convenient and quick and is convenient for later disassembly and replacement; the cross intersection of the tracks adopts the smooth transition of an arc section, and the support shaft of the noise elimination module is matched with the width of the adjusting track, so that the noise elimination module moves smoothly.

4. The adjusting track of the utility model is provided with a fixed shaft sleeve, and a positioning pin is inserted into the fixed shaft sleeve; the positioning pin is inserted into the adjusting track to support the silencing module to prevent the silencing module from falling, and the positioning pin is drawn out of the adjusting track to enable the silencing module to normally move, so that the position adjustment and the positioning of the silencing module are facilitated.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a front view of the vent in the present invention.

Fig. 3 is a cross-sectional view of the middle noise-canceling module of the present invention.

In the figure: 1. a sound silencing box; 2. a noise elimination module; 3. adjusting the track; 11. a vent; 21. a micropore guard plate; 22. a sound absorbing interlayer; 23. a support shaft; 31. and a positioning pin.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, in the embodiment of the present invention, a drum-type wall ventilation silencer comprises a silencing box 1, wherein the shape of the silencing box 1 is not limited, and the silencing box is installed in a wall body, preferably a square box body, and ventilation openings 11 are formed at the front and rear ends of the box body for sound waves to pass through.

The silencing modules 2 are arranged in the box body, the shapes of the silencing modules 2 are not limited, the silencing modules can be located on the propagation path of sound waves, the sound waves are blocked, and the silencing modules are preferably arranged in the box body in a staggered mode. The silencing module 2 is preferably a silencing drum, and when the silencing drum is fixed, the silencing effect can be maximized when the axis of the silencing drum is parallel to the ventilation opening 11.

The noise elimination module 2 comprises a support shaft 23 and a micropore protection plate 21 surrounding the support shaft 23, the support shaft 23 and the micropore protection plate 21 are filled with a sound absorption interlayer 22, and the sound absorption interlayer 22 is made of any material, such as glass wool, felt or perforated plywood.

In order to conveniently move and replace the silencing module 2, the adjusting rails 3 are symmetrically arranged on the box walls on the two sides in the silencing box 1, and the two ends of the supporting shaft 23 of the silencing module 2 are respectively arranged in the adjusting rails 3 to fix the silencing module 2.

The actual position of the adjusting track 3 is not limited, and the silencing module 2 can be conveniently moved. The shape of the cross-shaped; the width of the supporting shaft 23 of the silencing module 2 is matched with that of the adjusting track 3, so that the silencing module is prevented from shaking under the influence of sound waves after being fixed.

The adjusting track 3 is also provided with a positioning pin 31 which is convenient for positioning the silencing module 2. Virtually any securing structure may be substituted for the locating pin 31. The positioning pin 31 is not limited in position and is preferably disposed on the vertical section rail of the adjustment rail 3. The adjusting rail 3 is provided at the location of the corresponding positioning pin 31 with a fixing bushing, into which the positioning pin 31 is inserted, preferably in a horizontal arrangement.

After the silencing module 2 is adjusted to a preset position along the adjusting track 3, the positioning pin 31 is inserted into the adjusting track 3, the silencing module 2 is loosened, the silencing module 2 can fall down due to gravity, and is supported by the positioning pin 31 to realize positioning. The positioning pin 31 which does not participate in positioning is drawn out of the adjusting track 3, so that the normal movement of the noise elimination module 2 is facilitated.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A drum-type wall ventilation silencer is characterized by comprising a silencing box (1) with ventilation openings (11) formed in two ends, wherein an adjusting track (3) and a silencing module (2) which can move along the adjusting track (3) and then is fixed are arranged in the silencing box (1), and the silencing modules (2) are arranged in the silencing box (1) in a staggered mode; after entering the sound attenuation box (1) from the vent (11) at one side, the sound waves are blocked by the sound attenuation module (2) and then spread in an arc shape and then are transmitted out from the vent (11) at the other side.

2. A drum-type wall-ventilating muffler as claimed in claim 1, wherein the muffler module (2) is a muffler drum having an axis parallel to the ventilation opening (11).

3. A drum type wall surface ventilation muffler as claimed in claim 2, wherein the muffler module (2) comprises a support shaft (23) and a microporous protection plate (21) surrounding the support shaft (23), a sound absorbing interlayer (22) is filled between the support shaft (23) and the microporous protection plate (21), and the support shaft (23) is fixed on the adjustment track (3).

4. A drum-type wall surface ventilation muffler, as claimed in claim 3, wherein said sound absorbing interlayer (22) is glass wool, felt or perforated plywood.

5. The drum-type wall surface ventilation silencer according to any one of claims 1 to 4, wherein the silencing box (1) is a rectangular box body, and the adjusting track (3) is fixed on the wall of the silencing box (1); the adjusting track (3) is in a crisscross grid shape.

6. A drum-type wall ventilation silencer according to claim 5, characterized in that the adjusting rails (3) are symmetrically arranged on the two side walls in the silencing box (1), and the two ends of the supporting shaft (23) are respectively fixed on the two adjusting rails (3).

7. A drum type wall surface ventilation silencer according to claim 6, characterized in that the adjusting track (3) is provided with a positioning pin (31), and the silencing module (2) is positioned on the adjusting track (3) by the positioning pin (31) after moving to a predetermined position along the adjusting track (3).

8. A drum type wall surface ventilation muffler, as recited in claim 7, characterized in that said positioning pin (31) is disposed on the vertical section of the adjusting track (3), the adjusting track (3) is provided with a fixing bushing for inserting the positioning pin (31) therein at the position corresponding to the positioning pin (31); the positioning pin (31) has two working states: the positioning pin (31) is inserted into the adjusting track (3) to support the noise elimination module (2) to prevent the noise elimination module from falling; the positioning pin (31) is drawn out of the adjusting track (3) to enable the noise elimination module (2) to move normally.

9. A roller-type wall surface ventilation silencer according to claim 5, characterized in that the cross-shaped intersection of the adjusting track (3) adopts a smooth transition of a circular arc section.

10. A drum-type wall-surface ventilation muffler, as claimed in claim 5, characterized in that the support shaft (23) of the muffler module (2) is fitted to the width of the adjustment track (3).