Spiral silencer

Abstract

The utility model relates to the technical field of silencers, in particular to a spiral silencer. Comprising a barrel and a spiral silencing piece arranged in the barrel, a hole net is arranged in the barrel and located on the periphery of the spiral silencing piece, a sound absorbing material is arranged between the outer wall of the hole net and the inner wall of the barrel, a cavity is formed in the spiral silencing piece, a silencing material is laid in the cavity, and a plurality of silencing holes are formed in the spiral silencing piece; according to the utility model, the principles of a resistive silencer and a reactive silencer are combined, and the spiral silencing sheet with a spiral structure is adopted, so that the laying area of a silencing material can be increased, the complexity of a silencing cavity in the cylinder body can be increased, and meanwhile, the output path distance of sound waves can be increased, and therefore, the effects of reducing noise and absorbing sound can be achieved; meanwhile, the silencing holes are formed in the spiral silencing sheets, so that sound waves are repeatedly reflected in the cylinder body, and the silencing effect is further improved; and through cooperative use of the hole net and the sound absorbing material, the effects of noise reduction and sound attenuation can be further achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of silencers, and particularly relates to a spiral silencer. Background Art

[0002] A silencer is a device that allows a fluid (usually a gas or a liquid) to pass through. It can effectively suppress the propagation of noise. The design of the silencer utilizes acoustic principles. By changing the internal structure, the propagation path of sound waves is changed, and the energy of sound waves is reduced, thereby reducing the noise level. Currently, the main types of silencers include resistive silencers and reactive silencers. Resistive silencers mainly use sound-absorbing materials to absorb sound waves to achieve the sound-absorbing effect; reactive silencers mainly reduce noise by changing the frequency and phase of sound waves, that is, making the sound waves reflect and interfere in the cavity of the silencer, thereby gradually weakening the sound.

[0003] For the commonly used resistive silencers at present, due to the limited friction heat generation ability of the sound-absorbing materials, they cannot quickly absorb sound energy, and the sound-absorbing effect is still not good. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the utility model provides a spiral silencer that combines the principles of resistive silencers and reactive silencers, and achieves the sound-absorbing or noise-reducing effect by increasing the laying area of sound-absorbing materials, adding sound-absorbing holes, and increasing the complexity of the sound-absorbing cavity.

[0005] To achieve the above technical purpose, the utility model proposes the following technical solution: A spiral silencer, including a cylinder body and a spiral sound-absorbing sheet arranged inside the cylinder body. There is a hole mesh outside the spiral sound-absorbing sheet inside the cylinder body, and sound-absorbing materials are arranged between the outer wall of the hole mesh and the inner wall of the cylinder body. The inside of the spiral sound-absorbing sheet is a cavity, and sound-absorbing materials are laid in the cavity. A number of sound-absorbing holes are opened on the spiral sound-absorbing sheet.

[0006] Further, the sound-absorbing holes are arranged on the spiral sound-absorbing sheet according to the layout of three holes and three distances.

[0007] Further, flanges are installed at both the upper and lower ends of the cylinder body, and both ends of the spiral sound-absorbing sheet are respectively connected to the flanges.

[0008] Further, a number of fixing ribs are arranged on the inner wall of the cylinder body.

[0009] Further, the sound-absorbing material is 80-kg / m³ rock wool.

[0010] Further, the sound-absorbing material is spray cotton.

[0011] Further, glass fiber cloth is laid on both sides of the sound-absorbing material in the cavity.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The structure of the present utility model is novel, ingeniously conceived, and simple and convenient to operate. Compared with the prior art, it has the following advantages: By combining the principles of resistive mufflers and reactive mufflers, through the spiral muffling sheets with a spiral structure, the laying area of the sound-absorbing material can be increased, and the complexity of the sound-absorbing cavity inside the cylinder can be increased. At the same time, the output path distance of the sound wave is lengthened, thereby achieving the effects of reducing noise generation and sound absorption. At the same time, sound-absorbing holes are provided on the spiral muffling sheets, enabling the sound wave to be repeatedly reflected inside the cylinder, further improving the sound-absorbing effect; Through the combined use of the hole mesh and the sound-absorbing material, the effects of noise reduction and sound absorption can be further achieved. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2 is a schematic cross-sectional structure diagram of the present utility model;

[0015] Figure 3 is a schematic diagram of the structure of the spiral muffling sheet of the present utility model;

[0016] Figure 4 is the present utility model Figure 2 The enlarged view of the structure at position A in.

[0017] In the figure, 1, cylinder body; 2, spiral muffling sheet; 3, hole mesh; 4, sound-absorbing material; 5, cavity; 6, sound-absorbing material; 7, sound-absorbing hole; 8, flange; 9, fixing rib; 10, fiberglass cloth. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following are specific embodiments of the present utility model, and the technical solutions of the present utility model will be further described in conjunction with the accompanying drawings, but the present utility model is not limited to these embodiments.

[0019] As Figures 1-4 shown, the present utility model provides a spiral muffler, including a cylinder body 1 and a spiral muffling sheet 2 arranged inside the cylinder body 1. The cylinder body 1 can be made of galvanized sheet, aluminum sheet or steel sheet. A cylindrical hole mesh 3 is arranged outside the spiral muffling sheet 2 inside the cylinder body 1. The hole mesh 3 can be made of aluminum or iron. A sound-absorbing material 4 is arranged between the outer wall of the hole mesh 3 and the inner wall of the cylinder body 1. The spiral muffling sheet 2 is in close contact with the outer wall of the hole mesh 3. The inside of the spiral muffling sheet 2 is a cavity 5, and a sound-absorbing material 6 is laid in the cavity 5. A plurality of sound-absorbing holes 7 are opened on the spiral muffling sheet 2.

[0020] As Figures 1-4As shown in the figure, by arranging the spiral sound-absorbing sheet 2 inside the cylinder body 1, the sound-absorbing cavity inside the cylinder body 1 can be made into a spiral structure, increasing the complexity of the sound-absorbing cavity, thereby reducing the generation of noise; when the fluid passes through the spiral-structured sound-absorbing cavity, due to the inclination of the channel, the fluid will be affected by the inertial force and generate a rotational motion, which can effectively reduce the flow velocity of the fluid and reduce the impact of the fluid on the inner wall surface of the sound-absorbing cavity, thus reducing the generation of noise; at the same time, when the fluid passes through the spiral sound-absorbing sheet 2, the noise in the sound-absorbing cavity is absorbed by the sound-absorbing material 6; the complexity of the sound-absorbing cavity is further increased through the sound-absorbing holes 7, and the sound waves are repeatedly reflected in the sound-absorbing cavity, effectively reducing the sound; when the fluid flows in the sound-absorbing cavity, the fluid will collide with the inner wall surface of the cylinder body 1 multiple times. The fluid is separated from the inner wall of the cylinder body 1 by the hole mesh 3 and the sound-absorbing material 4. When the fluid flows in the sound-absorbing cavity, it will collide with the hole mesh 3 and the sound-absorbing material 4. When the fluid passes through the hole mesh 3, the flow direction of the fluid will change, causing the energy of the fluid to disperse in different directions, reducing the generation of noise. Similarly, when the sound waves in the sound-absorbing cavity pass through the hole mesh 3, they will also be scattered by the surface structure of the hole mesh, causing the sound waves to be reflected and scattered in all directions, so that the sound wave energy is dispersed in different directions, achieving the sound-absorbing effect. The sound-absorbing material 4 absorbs sound waves through its soft and porous characteristics. When the sound waves enter the pores of the porous material, it will cause the air and the fine fibers of the material in the pores to vibrate. Due to the frictional resistance between the air and the pore walls, the viscous resistance of the air, and heat conduction, etc., the sound energy will be converted into heat energy and dissipated, thus playing a role in sound absorption and noise reduction; the hole mesh 3 and the sound-absorbing material 4 are used in combination to achieve a better sound control effect; in the present utility model, the shape of the cylinder body 1 can also be designed as a square structure, which can be used for sound absorption of noise reduction rooms and cooling towers.

[0021] The sound-absorbing holes 7 are arranged on the spiral sound-absorbing sheet 2 according to a layout of three holes and three pitches.

[0022] As Figure 3 shown, by arranging the sound-absorbing holes 7 on the spiral sound-absorbing sheet 2 according to a layout of three holes and three pitches, the sound-absorbing holes 7 of different sizes and intervals can effectively absorb sound waves in different frequency ranges.

[0023] Flanges 8 are installed at both the upper and lower ends of the cylinder body 1, and both ends of the spiral sound-absorbing sheet 2 are respectively connected to the flanges 8.

[0024] As Figure 1 shown, the muffler can be conveniently installed on the pipeline through the flanges 8.

[0025] A number of fixing ribs 9 are provided on the inner wall of the cylinder body 1.

[0026] As Figure 2 shown, the hole mesh 3 can be conveniently fixed inside the cylinder body 1 through the fixing ribs 9 in combination with self-tapping screws.

[0027] The sound-absorbing material 4 is rock wool with a bulk density of 80 kg / m³.

[0028] As Figure 2 shown, rock wool with a bulk density of 80 kg / m³ has good heat insulation and fireproofing effects, which can ensure that the heat of the fluid in the sound-absorbing cavity does not escape. At the same time, it absorbs sound wave energy through the tiny pores and holes inside, converting the sound energy into heat energy and dissipating it.

[0029] The sound insulation material 6 is sprayed cotton.

[0030] As Figure 2 shown, the complex pore structure of the sprayed cotton helps to absorb sound waves.

[0031] Glass fiber cloth 10 is laid on both sides of the sound insulation material 6 in the cavity 5.

[0032] As Figure 4 shown, the glass fiber cloth 10 is laid on the upper and lower walls of the cavity 5, wrapping the sound insulation material 6 inside, which can stabilize the sound insulation material 6 and prevent it from leaking out.

[0033] Principle of use: The spiral muffler provided by the present utility model is installed on the pipeline through the flange 8. When there is fluid passing through the pipeline, the fluid will rotate and flow along the spiral sound-absorbing sheet 2, and the fluid will be guided in a spiral shape, resulting in a slowdown in the fluid velocity and avoiding direct impact on the inner wall of the sound-absorbing cavity, thereby reducing the generation of noise. At the same time, when the fluid passes through the spiral sound-absorbing sheet 2, the sprayed cotton absorbs the sound waves in the sound-absorbing cavity. The complexity of the sound-absorbing cavity is further increased through the sound-absorbing holes 7, which can cause the sound waves to be repeatedly reflected in the sound-absorbing cavity, promoting the sound reduction effect. The hole mesh 3 effectively blocks the propagation of sound waves, and the rock wool with a bulk density of 80 kg / m³ can effectively absorb sound waves. The hole mesh 3 and the rock wool with a bulk density of 80 kg / m³ are used together to achieve a better sound control effect.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art of the present utility model can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A spiral silencer, characterized in that: The invention comprises a cylinder (1) and a spiral silencer (2) arranged inside the cylinder (1); a mesh (3) is arranged inside the cylinder (1) and on the outer periphery of the spiral silencer (2); a sound absorbing material (4) is arranged between the outer wall of the mesh (3) and the inner wall of the cylinder (1); the interior of the spiral silencer (2) is a cavity (5); a sound absorbing material (6) is arranged in the cavity (5); and a plurality of sound absorbing holes (7) are opened on the spiral silencer (2).

2. A spiral silencer according to claim 1, characterized in that: The silencer holes (7) are provided on the spiral silencer plate (2) in a three-hole three-distance layout.

3. A spiral silencer according to claim 1, characterized in that: Flanges (8) are installed at the top and bottom of the cylinder (1), and both ends of the spiral silencer (2) are connected to the flanges (8) respectively.

4. A spiral silencer according to claim 1, characterized in that: A plurality of fixing ribs (9) are provided on the inner wall of the cylinder (1).

5. A spiral silencer according to claim 1, characterized in that: The sound absorbing material (4) is 80 bulk density rock wool.

6. A spiral silencer according to claim 1, characterized in that: The sound-absorbing material (6) is spray-coated cotton.

7. A spiral silencer according to claim 1, characterized in that: Glass fiber cloth (10) is laid in the cavity (5) and on both sides of the sound-absorbing material (6).

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