CN217654090U

CN217654090U - Composite perforated silencer

Info

Publication number: CN217654090U
Application number: CN202221264583.5U
Authority: CN
Inventors: 张玉敏; 张玉麟
Original assignee: Beijing Wanxunda Acoustics Equipment Co ltd
Current assignee: Beijing Wanxunda Acoustics Equipment Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-10-25
Anticipated expiration: 2032-05-24

Abstract

The utility model relates to a compound perforated silencer, including the silencer main part, the inside cavity that is formed with of silencer main part, the in-cavity is connected with noise reduction assembly, noise reduction assembly includes first noise elimination board and the second noise elimination board that is parallel to each other, a plurality of micropores have been seted up on first noise elimination board and the second noise elimination board respectively, first noise elimination board and second noise elimination board respectively with cavity inner wall sliding fit, wear to be equipped with a two-way lead screw that is used for driving first noise elimination board and second noise elimination board simultaneous movement on first noise elimination board and the second noise elimination board, two-way lead screw length is perpendicular with silencer main part length direction, two-way lead screw one end and cavity inner wall connection, the two-way lead screw other end is located the outside of silencer main part. The method has the effect of being suitable for different frequency band noises.

Description

Composite perforated silencer

Technical Field

The application relates to the field of noise processing devices, in particular to a composite perforated silencer.

Background

The composite perforated noise elimination is a sound absorption structure which is widely applied and is generally applied to the outlet of an air conditioner ventilation pipe and a ventilation pipe of a workshop to absorb noise generated by airflow flow.

At present, the existing composite perforated muffler comprises a muffler main body and a silencing plate positioned in the muffler main body, wherein a plurality of micropores with the diameter smaller than 1mm are formed in the silencing plate, and the distance between the silencing plate and the inner wall of the muffler main body is controlled, so that the composite perforated muffler can be suitable for noise frequency bands needing to be eliminated, and the silencing effect is achieved.

In view of the above-described related art, the inventors of the present invention have considered that the conventional composite perforated muffler has a sound-deadening plate fixed to the inside of the muffler body, and therefore the conventional perforated muffler can perform a sound-deadening effect only in a noise frequency band where sound is to be reduced, but is difficult to perform a sound-deadening effect in other frequency bands.

SUMMERY OF THE UTILITY MODEL

In order to adapt to noise of different frequency bands, the application provides a composite perforated silencer.

The application provides a compound perforation silencer adopts following technical scheme: including the silencer main part, the inside cavity that is formed with of silencer main part, the in-cavity connection has the amortization subassembly, the amortization subassembly includes first anechoic board and the second anechoic board that is parallel to each other, a plurality of micropores have been seted up on first anechoic board and the second anechoic board respectively, first anechoic board and second anechoic board respectively with cavity inner wall sliding fit, wear to be equipped with a two-way lead screw that is used for driving first anechoic board and second anechoic board simultaneous movement on first anechoic board and the second anechoic board, two-way lead screw length is perpendicular with silencer main part length direction, two-way lead screw one end and cavity inner wall connection, the two-way lead screw other end is located the outside of silencer main part.

Through adopting above-mentioned technical scheme, the staff can be located the outside one end of silencer main part through rotating the two-way lead screw and make first noise reduction board and second noise reduction board move in opposite directions simultaneously or move back to back simultaneously thereby change the distance of first noise reduction board and cavity inner wall and the distance of second noise reduction board and cavity inner wall to this reaches the effect that is applicable to different frequency band noises.

Optionally, the first silencing plate is fixedly connected with a first sleeve, and the first sleeve is sleeved on the bidirectional screw rod and is connected with the bidirectional screw rod in a thread fit manner; the second silencing plate is fixedly connected with a second sleeve, and the second sleeve is sleeved on the bidirectional screw rod and connected with the bidirectional screw rod in a thread fit mode.

Through adopting above-mentioned technical scheme, the axis of first sleeve perpendicular to first noise reduction board and with first noise reduction board fixed connection, and the axis of second sleeve perpendicular to second noise reduction board and with second noise reduction board fixed connection, when two-way lead screw rotated, under the effect of screw thread, first sleeve and second sleeve drive first noise reduction board and second noise reduction board simultaneously move in opposite directions or move back to back simultaneously respectively.

Optionally, the first muffling plate and the second muffling plate are respectively provided with a sliding portion, a sliding groove is formed in a position of the inner wall of the cavity corresponding to the sliding portion, the sliding portion is inserted into the sliding groove, and the sliding portion is inserted into and matched with the sliding groove.

Through adopting above-mentioned technical scheme, the sliding tray plays spacing effect to the sliding part on first anechoic board and the second anechoic board.

Optionally, a handle is arranged at one end of the bidirectional screw rod, which is located outside the muffler main body, and the handle is connected with the bidirectional screw rod in a plug-in matching mode.

Through adopting above-mentioned technical scheme, the handle provides the point of application of force for the staff is rotating the outside one end that the two-way lead screw is located the silencer main part, makes things convenient for the staff to rotate two-way lead screw through the handle.

Optionally, a tooth groove is circumferentially distributed at one end, close to the silencer main body, of the handle, a limiting component used for abutting against the tooth groove is fixedly connected to the outer portion of the silencer main body, the limiting component comprises a rotating rod fixedly connected with the silencer main body, the axis of the rotating rod is parallel to the axis of the bidirectional screw rod, a limiting part used for abutting against the tooth groove is rotatably connected to the rotating rod, a torsion spring is sleeved on the rotating rod, one end of the torsion spring is fixedly connected with the silencer main body, and the other end of the torsion spring is fixedly connected with the limiting part.

Through adopting above-mentioned technical scheme, locating part and the handheld tooth's socket butt, the torsional spring provides the resilience force for the locating part still can with the tooth's socket butt after being dialled open, and the locating part then makes the handle can only unidirectional rotation under no special circumstances with the tooth's socket butt, prevents that the handle gyration from leading to the condition of the distance change between first anechoic board and the second anechoic board taking place.

Optionally, flanges are respectively arranged at two ends of the muffler main body along the length direction, the flanges are fixedly connected with the muffler main body, and the flanges are communicated with the cavity and form a connecting channel.

Through adopting above-mentioned technical scheme, the silencer main part can communicate through the flange at both ends and external equipment's pipeline.

Optionally, the cavity is internally provided with an input pipe orifice corresponding to one end of the connecting channel, the cavity is internally provided with an output pipe orifice corresponding to the other end of the connecting channel, the flange comprises a flange plate and a connecting part, and the connecting part is respectively connected with the input pipe orifice and the output pipe orifice in a thread fit manner.

By adopting the technical scheme, the flanges at the two ends of the silencer main body are respectively connected with the input pipe opening and the output pipe opening in a thread fit mode, so that the flanges are convenient for workers to replace subsequently, the silencer main body can be connected with different devices, and the noise reduction and silencing effects are achieved.

Optionally, one end of the input pipe orifice and one end of the output pipe orifice, which are far away from the flange, are respectively and fixedly connected with a guide cylinder, a plurality of air holes are uniformly formed in the circumferential wall of the guide cylinder, and the diameter of the guide cylinder is gradually reduced from the direction close to the connecting part to the direction far away from the connecting part.

Through above-mentioned technical scheme, draft tube and gas pocket play redirecting and preliminary control airflow flow's effect to the air current for noise elimination effect is better.

In summary, the present application includes at least one of the following beneficial technical effects:

the distance between the first sound-absorbing plate and the second sound-absorbing plate is adjusted by rotating the two-way screw rod, so that the muffler main body can adapt to the noise of different frequency bands, and the effect of adapting to the noise of different frequency bands is achieved;

the limiting piece for limiting the rotation of the handle is arranged outside the silencer main body, so that the handle can only rotate in a single direction under the condition of no special condition, and the effect of preventing the distance between the first silencing plate and the second silencing plate from being easily changed is achieved;

drawings

FIG. 1 is a schematic perspective view of a composite perforated muffler according to an embodiment of the present application;

FIG. 2 is a schematic view of the internal structure of FIG. 1;

fig. 3 is a partially enlarged schematic view of a in fig. 1.

Description of reference numerals: 1. a muffler main body; 2. a cavity; 3. a noise reduction assembly; 4. a first sound-deadening panel; 5. a second muffler plate; 6. micropores; 7. a bidirectional screw rod; 8. a first sleeve; 9. a second sleeve; 10. a sliding part; 11. a sliding groove; 12. a handle; 13. a tooth socket; 14. rotating the rod; 15. a limiting member; 16. a torsion spring; 17. a flange; 18. a connecting channel; 19. an input pipe orifice; 20. an output nozzle; 21. a flange plate; 22. a connecting portion; 23. a draft tube; 24. and (4) air holes.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a composite perforated silencer, refer to fig. 1-2, including silencer main part 1, silencer main part 1 is inside to be formed with cavity 2, and silencer main part 1 length direction's both ends fixedly connected with respectively with the flange 17 of cavity 2 intercommunication, form between flange 17 and the cavity 2 and connect the passageway 18.

The two-way screw rod 7 is arranged inside the cavity 2, the silencing assembly comprises a first silencing plate 4 and a second silencing plate 5 which are parallel to each other, a plurality of micropores 6 with the diameter not larger than 1mm are respectively and uniformly arranged on the first silencing plate 4 and the second silencing plate 5, a first sleeve 8 with an axis perpendicular to the first silencing plate 4 is fixedly connected to the first silencing plate 4 in a welding mode, the first sleeve 8 is sleeved outside the two-way screw rod 7 and is connected with the two-way screw rod 7 in a thread fit mode, a second sleeve 9 with an axis perpendicular to the second silencing plate 5 is fixedly connected to the second silencing plate 5 in a welding mode, the second sleeve 9 is also sleeved outside the two-way screw rod 7 and is connected with the two-way screw rod 7 in a thread fit mode, the inner wall of the cavity 2 at one end of the two-way screw rod 7 is connected with the other end of the two-way screw rod 7, the other end of the two-way screw rod 7 is located outside the silencer main body 1, and the worker can conveniently drive the two-way screw rod 7 to rotate.

Referring to fig. 2-3, a handle 12 is sleeved on one end of the bidirectional screw 7, which is located outside the muffler body 1, a tooth groove 13 is arranged at one end of the handle 12, which is close to the muffler body 1, and a limiting assembly is further arranged on the outer surface of the muffler body 1, wherein the limiting assembly includes a rotating rod 14 whose axis is parallel to that of the bidirectional screw 7, one end of the rotating rod 14 is fixedly connected with the outer surface of the muffler body 1, the other end of the rotating rod 14 is rotatably connected with a limiting member 15, a torsion spring 16 is further sleeved on the rotating rod 14, one end of the torsion spring 16 is fixedly connected with the muffler body 1, the other end of the torsion spring 16 is fixedly connected with the limiting member 15, one end of the limiting member 15, which is far away from the rotating rod 14, is abutted against the tooth groove 13 on the handle 12, and under the action of the torsion spring 16, the rotation of the bidirectional screw 7 is prevented, and thus the change of the distance between the first muffling plate 4 and the second muffling plate 5 is caused.

When the staff needs to shorten the distance between the first muffling plate 4 and the second muffling plate 5, the limiting part 15 can be shifted, the limiting part 15 is not abutted to the tooth grooves 13 on the handle 12, the handle is further rotated, the distance between the first muffling plate 4 and the second muffling plate 5 is shortened, then the limiting part 15 is loosened, the limiting part 15 is abutted to the tooth grooves 13, the phenomenon that the bidirectional screw rod 7 rotates under the action of self gravity due to the first muffling plate 4 and the second muffling plate 5 is avoided, and the distance between the first muffling plate 4 and the second muffling plate 5 is changed.

The position that is equipped with at the both ends of cavity 2 and corresponds connecting channel 18 is equipped with input mouth of pipe 19 and output mouth of pipe 20 respectively, input mouth of pipe 19 and output mouth of pipe 20 respectively with the inner wall of cavity 2 through welded mode fixed connection, the inner wall of input mouth of pipe 19 and output mouth of pipe 20 is equipped with the internal thread respectively, and flange 17 is including being used for connecting outside pipeline ring flange 21 and being used for the connecting portion 22 of being connected with silencer main part 1, the outer wall of connecting portion 22 is equipped with the external screw thread, connecting portion 22 is connected with input mouth of pipe 19 and output mouth of pipe 20 through screw-thread fit's mode, this makes the staff change the flange 17 at the both ends of silencer main part 1 at any time, increase the connectability of silencer main part 1 with other equipment.

The ends of the output pipe opening 20 and the input pipe opening 19 far away from the flange 17 are fixedly connected with a guide cylinder 23 which is distributed around the edges of the output pipe opening 20 and the input pipe opening 19, the guide cylinder 23 is conical, a plurality of air holes 24 are arranged on the peripheral wall of the guide cylinder, the guide cylinder 23 plays a role in guiding the air flow entering the cavity 2 through the input pipe opening 19, and the air holes 24 on the guide cylinder 23 play a role in shunting the air flow entering the input pipe opening 19, so that the effect of controlling the flow is achieved.

The implementation principle of the composite perforated silencer in the embodiment of the application is as follows: the silencer main body 1 is connected with other equipment through flanges 17 which are in threaded connection at two sides, air flow generated by other equipment enters the cavity 2 through the input pipe orifice 19, the micro holes 6 play a role in changing the sound frequency of the air flow for the air flow entering the cavity 2 due to the plurality of micro holes 6 distributed on the first silencing plate 4 and the second silencing plate 5 inside the cavity 2, so that the aim of silencing is achieved, and a worker can adjust the distance between the first silencing plate 4 and the second silencing plate 5 through the bidirectional screw rod 7 to achieve silencing of noise of different frequency bands generated by the air flow, so that the effect of being suitable for the noise of different frequency bands is achieved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A composite perforated muffler comprising a muffler main body (1), a cavity (2) being formed inside the muffler main body (1), characterized in that: the silencer is characterized in that a silencing component (3) is connected in the cavity (2), the silencing component (3) comprises a first silencing plate (4) and a second silencing plate (5) which are parallel to each other, a plurality of micropores (6) are formed in the first silencing plate (4) and the second silencing plate (5) respectively, the first silencing plate (4) and the second silencing plate (5) are in sliding fit with the inner wall of the cavity (2) respectively, a bidirectional screw rod (7) used for driving the first silencing plate (4) and the second silencing plate (5) to move synchronously is arranged on the first silencing plate (4) in a penetrating mode, the length direction of the bidirectional screw rod (7) is perpendicular to the length direction of the silencer main body (1), one end of the bidirectional screw rod (7) is connected with the inner wall of the cavity (2), and the other end of the bidirectional screw rod (7) is located outside the silencer main body (1).

2. The composite perforated muffler according to claim 1, wherein: the first silencing plate (4) is fixedly connected with a first sleeve (8), and the first sleeve (8) is sleeved with the bidirectional screw rod (7) and is connected with the bidirectional screw rod (7) in a threaded fit manner; the second silencing plate (5) is fixedly connected with a second sleeve (9), and the second sleeve (9) is sleeved with the bidirectional screw rod (7) and is connected with the bidirectional screw rod (7) in a threaded fit mode.

3. The composite perforated muffler of claim 2, wherein: the first silencing plate (4) and the second silencing plate (5) are respectively provided with a sliding part (10), the inner wall of the cavity (2) is provided with a sliding groove (11) at a position corresponding to the sliding part (10), the sliding part (10) is inserted into the sliding groove (11), and the sliding part (10) is inserted into the sliding groove (11) to be matched with the sliding groove (11).

4. The composite perforated muffler of claim 1, wherein: the bidirectional screw rod (7) is located one end of the outer portion of the silencer main body (1) is provided with a handle (12), and the handle (12) is connected with the bidirectional screw rod (7) in an inserting and matching mode.

5. The composite perforated muffler of claim 4, wherein: handle (12) are close to there are tooth's socket (13) along the outer wall circumference distribution of silencer main part (1), silencer main part (1) outside fixedly connected with is used for handle (12) pivoted spacing subassembly, spacing subassembly include with silencer main part (1) fixed connection's dwang (14), the axis of dwang (14) with the axis of two-way lead screw (7) is parallel, it is used for the butt to rotate to be connected with on dwang (14) locating part (15) of tooth's socket (13), the cover is equipped with torsional spring (16) on dwang (14), torsional spring (16) one end with locating part (15) fixed connection, the other end with locating part (15) are kept away from the one end fixed connection of tooth's socket (13).

6. The composite perforated muffler according to claim 2, wherein: the silencer is characterized in that flanges (17) are respectively arranged at two ends of the silencer main body (1) in the length direction, the flanges (17) are fixedly connected with the silencer main body (1), and the flanges (17) are communicated with the cavity (2) and are formed with connecting channels (18).

7. The composite perforated muffler according to claim 6, wherein: the cavity (2) is internally corresponding to an input pipe orifice (19) of one end fixedly connected with of the connecting channel (18), the cavity (2) is internally corresponding to an output pipe orifice (20) of the other end fixedly connected with of the connecting channel (18), the flange (17) comprises a flange plate (21) and a connecting part (22), and the connecting part (22) is respectively connected with the input pipe orifice (19) and the output pipe orifice (20) in a thread fit mode.

8. The composite perforated muffler according to claim 7, wherein: the utility model discloses a flow guide tube, including ring flange (21), input mouth of pipe (19) and output mouth of pipe (20) are connected with draft tube (23) respectively, evenly be equipped with a plurality of gas pockets (24) on the draft tube (23) perisporium, the external diameter of draft tube (23) is followed and is close to direction of connecting portion (22) is towards keeping away from the direction of connecting portion (22) reduces gradually.