CN217329001U

CN217329001U - Silencer for ventilating duct

Info

Publication number: CN217329001U
Application number: CN202220634199.3U
Authority: CN
Inventors: 钟月婵
Original assignee: Guangzhou Vibration Control Tech Co ltd
Current assignee: Guangzhou Vibration Control Tech Co ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-08-30
Anticipated expiration: 2032-03-22

Abstract

The utility model discloses a silencer for air pipe, including box and noise-abatement structure, the box has and holds the chamber, the box both ends form the port respectively, each noise-abatement structure includes the baffler, the noise elimination orifice plate and inhale the sound body, per two bafflers become a set of splayed and install respectively in each port department of box, two noise elimination orifice plate parallel arrangement are in the box, and form the noise elimination passageway correspondingly between two noise elimination orifice plates, each noise elimination orifice plate both ends are connected with the baffler respectively, and on each noise elimination orifice plate, install respectively on the box at lower both ends, inhale the sound body holding between relative baffler and noise elimination orifice plate in the box, in order to supply the noise absorption, a plurality of perforation have all been seted up on baffler and the noise elimination orifice plate, in order that the air feed stream passes through. The utility model discloses a baffler, noise elimination orifice plate and sound absorbing body cooperation noise elimination are fallen and are fallen, and noise elimination effect is good.

Description

Silencer for ventilating duct

Technical Field

The utility model relates to a field of making an uproar, concretely relates to silencer for air pipe falls in pipeline.

Background

The absorption type silencer is a device which converts sound energy into heat energy to be dissipated by utilizing friction and viscous resistance when sound waves are transmitted by a porous sound absorption material, thereby achieving the purposes of silencing and reducing noise, and is widely applied to noise reduction of ventilation pipelines or exhaust systems. The existing absorption type ventilating duct silencer has a complex structure and a non-ideal silencing effect.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the utility model provides a silencer for air pipe with multiple noise elimination noise reduction effect.

The utility model discloses technical scheme as follows: the utility model provides a silencer for air pipe, includes box and noise-abatement structure, the box has and holds the chamber, the box both ends form the port respectively, the box is including relative both sides wall that sets up and roof, the diapire that sets up relatively from top to bottom, noise-abatement structure sets up both ends in the box relatively, each noise-abatement structure includes baffler, noise elimination orifice plate and inhales the sound body, every two bafflers become a set of splayed and install each port department at the box that is, the upper and lower both ends of each baffler are installed respectively on roof and diapire, two noise elimination orifice plates are on a parallel with the lateral wall and set up in the box with the interval, and correspondingly form the noise elimination passageway between two noise elimination orifice plates, each noise elimination orifice plate both ends respectively with the baffler end connection at box both ends, and the upper and lower both ends of each noise elimination orifice plate are installed respectively on roof and diapire, inhale the sound body holding through between relative baffler and noise elimination orifice plate in the box, for absorbing noise, a plurality of through holes are formed in the blocking plate and the silencing hole plate, and air flow passes through the through holes.

Furthermore, the baffler is the arc, and each port department of box is provided with two noise-abatement structures side by side, and two noise-abatement structures's adjacent baffler is connected and is formed the cavity semicylindrical.

Furthermore, a cavity is enclosed by the adjacent and connected blocking plates of the two silencing structures and the adjacent and parallel silencing hole plates of the two silencing structures, and the sound absorbing body is filled in the cavity.

Further, the silencer includes that first refute and connect the structure, and first refute and connect the structure and include a plurality of flanges altogether, the end of plugging into that lateral wall and roof or diapire are located box both ends department is connected with respectively flange altogether to supply to install on air pipe through flange altogether.

Further, first refute and connect structure and include a plurality of connection corner fittings, connection corner fitting is the L type, and each connection corner fitting both ends are connected with adjacent two flange one end altogether respectively to supply fixed flange altogether, the through-hole has been seted up on the connection corner fitting, in order to supply the bolt to pass through and fix on air pipe.

Furthermore, the silencer comprises a plurality of buckling structures arranged on the inner side of the joint of the side wall and the top wall or the bottom wall, each buckling structure comprises an installation part and a buckling part, the installation part is fixedly arranged on the side wall, the buckling parts are fixedly arranged on the adjacent top wall or the adjacent bottom wall, and the buckling parts are buckled on the installation parts.

Further, the installed part includes canned paragraph, linkage segment and joint section, and the canned paragraph sets firmly on the lateral wall, and the linkage segment sets firmly on roof or diapire, and the joint section is connected between canned paragraph and linkage segment, and the joint section is the wave and buckles and form the draw-in groove, and the buckling piece is the L type, and buckling piece one end sets firmly on roof or diapire, and the other end joint is in the draw-in groove.

Furthermore, the silencer comprises a plurality of clamping structures arranged on the top wall or the bottom wall, each clamping structure comprises a clamping plate and a buckling plate, the clamping plate is a U-shaped groove plate and fixed on the silencing hole plate, one end of the buckling plate is fixedly arranged on the top wall or the bottom wall, the other end of the buckling plate is bent to form a U-shaped buckle, and the buckling plate is correspondingly matched and buckled on the clamping plate.

Furthermore, the inner side of the barrier plate, which is in contact with the sound absorbing body, is provided with alkali-free glass fiber cloth for vibration reduction and noise reduction.

Further, the sound absorption body is a porous sound absorption material.

Compared with the prior art: the utility model provides a silencer for air pipe, through arc baffler and the noise elimination orifice plate that is equipped with the interval setting in the box for the air current is slowed down and is compressed when flowing to the noise elimination passageway between two noise elimination orifice plates along baffler surface, thereby reaches the effect of noise reduction, and through inhaling the sound body effective absorption noise.

Drawings

Fig. 1 is a perspective view of a muffler for a ventilation duct according to the present invention.

Fig. 2 is a front view of a muffler for an air duct of the present invention.

Fig. 3 is an enlarged schematic view at a in fig. 2.

Fig. 4 is an enlarged schematic view at B in fig. 2.

Fig. 5 is a schematic cross-sectional view of a muffler for an air duct according to the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

Referring to fig. 1 to 5, a muffler for a ventilation duct includes a case 1 and a muffling structure 2, where the case 1 has a receiving cavity, and two ends of the receiving cavity are respectively formed with a port. The box 1 comprises two opposite side walls 11, a top wall 12 and a bottom wall 13, wherein the top wall 12 and the bottom wall 13 are oppositely arranged from top to bottom, the box 1 is used for being installed in a ventilation pipeline, and the box wall of the box 1 is of a multilayer structure, so that when air flow passes through the silencer, vibration of the box 1 is reduced, and noise transmission is reduced. The silencing structures 2 are oppositely arranged at two ends in the box body 1 and are used for reducing sound generated in the ventilating duct.

Each silencing structure 2 comprises a blocking plate 21, a silencing hole plate 22 and a sound absorbing body 23, each blocking plate 21 is an arc-shaped plate, and every two blocking plates 21 form a group and are arranged at each port of the box body 1 in a splayed mode; it will be appreciated that more than one set of baffle plates 21, i.e. more than one set of muffling structures 2, may be installed in each port. The upper and lower ends of each baffle plate 21 are respectively mounted on the top wall 12 and the bottom wall 13. The two sound-damping perforated plates 22 are arranged in the housing 1 parallel to the side walls 11 at a distance from one another, and accordingly a sound-damping channel is formed between the two sound-damping perforated plates 22 for the passage of a gas flow. Two ends of each silencing orifice plate 22 are respectively connected with the ends of the baffle plates 21 at two ends of the box body 1, the upper end and the lower end of each silencing orifice plate 22 are respectively arranged on the top wall 12 and the bottom wall 13, and the sound absorbing body 23 is accommodated in a hollow chamber which is enclosed by the baffle plates 21 and the silencing orifice plates 22 and is opposite to the baffle plates 21 in the box body 1 so as to absorb noise. The blocking plate 21 and the silencing orifice plate 22 are both provided with a plurality of perforations which are uniformly distributed for air flow to pass through. In this embodiment, two silencing structures 2 are arranged side by side at the port of the box body 1, and the blocking plate 21 of the two silencing structures 2 at each port is detachably connected through a connecting plate (not shown), so that the blocking plate 21 and the silencing orifice plate 22 can be conveniently disassembled and assembled.

Furthermore, adjacent baffle plates 21 of the two sound-absorbing structures 2 at each port of the box body 1 are connected to form a hollow semi-cylindrical shape, the adjacent and connected baffle plates 21 of the two sound-absorbing structures 2 and the adjacent and parallel sound-absorbing pore plates 22 of the two sound-absorbing structures 2 enclose a cavity, and the cavity is filled with the sound-absorbing body 23. The air flow flows along the surface of the baffle plate 21 to the sound-deadening passage between the two sound-deadening orifice plates 22, while part of the air flow flows from the perforations of the baffle plate 21 to the sound-absorbing body 23. The inner side of the baffle plate 21, which is in contact with the sound absorbing body 23, is provided with alkali-free glass fiber cloth (not shown) for vibration and noise reduction. The sound absorption body 23 is a porous sound absorption material, such as sound absorption cotton and glass cotton.

When the airflow flows from the ventilation pipeline to the inside of the box body 1, the airflow firstly blows to the blocking plates 21 of the two silencing structures 2 and flows to the silencing channel between the two silencing hole plates 22, the flow speed of the airflow is reduced, the airflow is continuously compressed, expanded and recompressed, and the kinetic energy of the airflow is converted into heat energy, so that the effect of reducing the noise is achieved. The part of the air flow reduced in flow velocity by the baffle plate 21 enters the sound absorbing body 23 through the perforations and further flows out through the perforations, the sound power of the air flow after flowing out is reduced, and the sound absorbing body 23 is designed according to the frequency spectrum characteristics of noise, so that the noise can be effectively absorbed.

The muffler further comprises a first docking structure 3 for mounting the tank 1 on the ventilation duct by means of the first docking structure 3. First refute and connect structure 3 and include a plurality of flange 31 altogether, the end of plugging into that lateral wall 11 and roof 12 or diapire 13 are located 1 both ends of box port department is connected with respectively flange 31 altogether to supply to install on ventilation pipe through flange 31 altogether.

The first connection structure 3 includes a plurality of connection angle members 32, each connection angle member 32 is L-shaped, and two ends of each connection angle member 32 are respectively connected to one end of two adjacent common-edge flanges 31, so as to fix the common-edge flanges 31. In this embodiment, each of the common flanges 31 has a mounting groove, and two ends of the connecting angle member 32 are respectively mounted in the mounting grooves. The connecting angle piece 32 is provided with a through hole, and a bolt passes through the through hole and fixes the box body 1 on the ventilation pipeline.

The silencer comprises a plurality of buckling structures 4 arranged on the inner side of the joint of the side wall 11 and the top wall 12 or the bottom wall 13, each buckling structure 4 comprises a mounting part 41 and a buckling part 42, the mounting part 41 is fixedly arranged on the side wall 11, the buckling part 42 is fixedly arranged on the adjacent top wall 12 or the bottom wall 13, and the buckling part 42 is buckled on the mounting part 41.

Mounting member 41 includes fixed segment 411, linkage segment 412 and joint section 413, fixed segment 411 sets firmly on lateral wall 11, linkage segment 412 sets firmly on roof 12 or diapire 13, joint section 413 is connected between fixed segment 411 and linkage segment 412, and joint section 413 is the wave and buckles and form the draw-in groove, buckling piece 42 is the L type, and buckling piece 42 one end sets firmly on roof 12 or diapire 13, the other end joint is in the draw-in groove, a junction for stabilizing lateral wall 11 and roof 12 or diapire 13, prevent that lateral wall 11 and roof 12 or diapire 13 from being connected insecure and producing the noise.

In addition, the silencer still includes setting up on roof 12 or diapire 13 and be located a plurality of card and hold structure 5 in the noise elimination passageway, each card holds structure 5 and includes cardboard 51 and buckle 52, cardboard 51 is the U type frid, fixes on noise elimination orifice plate 22, buckle 52 one end sets firmly on roof 12 or diapire 13, the other end is buckled and is formed the U type and detain, correspondingly the cooperation buckle on cardboard 51, when needing to demolish baffling board 21 and noise elimination orifice plate 22, with cardboard 51 from the buckle 52 separation can, it is convenient to demolish, the change of being convenient for.

To sum up, the utility model discloses a be equipped with arc baffler 21 and noise elimination orifice plate 22 in box 1 for the air current is slowed down and is compressed when flowing to the noise elimination passageway between two noise elimination orifice plates 22 along baffler 21 surface, thereby reaches the effect of noise reduction, and through inhaling 23 effective absorption noises of sound body, has multiple noise reduction effect.

As long as the idea created by the present invention is not violated, various different embodiments of the present invention can be arbitrarily combined, and all the embodiments should be regarded as the content disclosed by the present invention; the utility model discloses an in the technical concept scope, what carry out multiple simple variant and different embodiments to technical scheme goes on does not violate the utility model discloses the arbitrary combination of the thought of creation all should be within the scope of protection of the utility model.

Claims

1. The utility model provides a silencer for air pipe, includes box (1) and noise-abatement structure (2), and box (1) has and holds the chamber, and box (1) both ends form the port respectively, box (1) is including relative both sides wall (11) and relative roof (12), diapire (13) that set up from top to bottom, its characterized in that of setting up: the silencing structure (2) is oppositely arranged at two ends in the box body (1), each silencing structure (2) comprises baffle plates (21), silencing pore plates (22) and a sound absorbing body (23), every two baffle plates (21) form a group and are arranged at each port of the box body (1) in a splayed manner, the upper end and the lower end of each baffle plate (21) are respectively arranged on the top wall (12) and the bottom wall (13), the two silencing pore plates (22) are parallel to the side wall (11) and are arranged in the box body (1) at intervals, a silencing channel is correspondingly formed between the two silencing pore plates (22), two ends of each silencing pore plate (22) are respectively connected with the end parts of the baffle plates (21) at two ends of the box body (1), the upper end and the lower end of each silencing pore plate (22) are respectively arranged on the top wall (12) and the bottom wall (13), the sound absorbing body (23) is accommodated in a hollow chamber which is enclosed by the baffle plates (21) and the pore plates (22) which are opposite, for absorbing noise, a plurality of through holes are arranged on the blocking plate (21) and the silencing pore plate (22) for air flow to pass through.

2. The muffler of claim 1, wherein: the baffle plate (21) is an arc-shaped plate, two silencing structures (2) are arranged at each port of the box body (1) side by side, and adjacent baffle plates (21) of the two silencing structures (2) are connected to form a hollow semi-cylindrical shape.

3. The muffler of claim 2, wherein: the adjacent and connected blocking plates (21) of the two silencing structures (2) and the adjacent and parallel silencing hole plates (22) of the two silencing structures (2) enclose a cavity, and the sound-absorbing body (23) is filled in the cavity.

4. The muffler of claim 1, wherein: including first refute and connect structure (3), first refute and connect structure (3) including a plurality of flange (31) altogether, lateral wall (11) are connected with respectively with roof (12) or diapire (13) the end of plugging into that is located box (1) both ends department flange (31) altogether to supply to install on ventilation pipe through flange (31) altogether.

5. The muffler of claim 4, wherein: first connection structure (3) of refuting includes a plurality of connection angle spare (32), connection angle spare (32) are the L type, and each connection angle spare (32) both ends are connected with adjacent two flange (31) one end altogether respectively to supply fixed flange (31) altogether, the through-hole has been seted up on connection angle spare (32) to supply the bolt to pass through and fix on air pipe.

6. The muffler of claim 1, wherein: the novel folding type folding table comprises a plurality of buckling structures (4) arranged on the inner side of the joint of a side wall (11) and a top wall (12) or a bottom wall (13), each buckling structure (4) comprises an installation part (41) and a buckling part (42), the installation part (41) is fixedly arranged on the side wall (11), the buckling parts (42) are fixedly arranged on the adjacent top wall (12) or the adjacent bottom wall (13), and the buckling parts (42) are buckled on the installation part (41).

7. The muffler of claim 6, wherein: installation part (41) are including fixed section (411), linkage segment (412) and joint section (413), fixed section (411) sets firmly on lateral wall (11), linkage segment (412) sets firmly on roof (12) or diapire (13), joint section (413) is connected between fixed section (411) and linkage segment (412), and joint section (413) are the wave and buckle and form the draw-in groove, buckling piece (42) are the L type, and buckling piece (42) one end sets firmly on roof (12) or diapire (13), the other end joint is in the draw-in groove.

8. The muffler of claim 1, wherein: including setting up a plurality of card structure (5) of holding on roof (12) or diapire (13), each card structure (5) of holding includes cardboard (51) and buckle (52), and cardboard (51) are U type frid, fixes on noise elimination orifice plate (22), and buckle (52) one end sets firmly on roof (12) or diapire (13), and the other end is buckled and is formed U type and detain, cooperates the buckle on cardboard (51) correspondingly.

9. The muffler of claim 1, wherein: the inner side of the barrier plate (21) contacting with the sound absorption body (23) is provided with alkali-free glass fiber cloth for vibration and noise reduction.

10. The muffler of claim 1, wherein: the sound absorption body (23) is made of porous sound absorption material.