Pneumatic silencing equipment

Abstract

The utility model discloses a pneumatic silencing device which comprises a shell, a cover body is installed on the top of the shell, and a silencing mechanism is installed on the shell and the cover body. An inner cavity of the shell is filled with a porous sound absorption block, and a mounting channel for accommodating the silencing mechanism is formed in the porous sound absorption block; the silencing mechanism comprises a silencing pipe, the silencing pipe is movably installed in the installation channel, sound absorption holes are formed in the surface of the silencing pipe, a sound absorption channel is formed in the silencing pipe, and a porous sound absorption column is installed in the sound absorption channel. The pneumatic silencing device has the advantage of being good in sound absorption effect, and the problems that an existing pneumatic silencing device is complex in structure in the using process, the sound absorption effect is poor, the manufacturing cost is improved due to the complex structure, follow-up overhaul and maintenance are affected, noise in the working environment is improved due to the poor sound absorption effect, and the service life of the pneumatic silencing device is prolonged are solved. And the hearing of workers is harmed.

Description

Technical Field

[0001] This utility model relates to the field of silencing equipment technology, specifically a pneumatic silencing device. Background Technology

[0002] Pneumatic silencers are devices used to reduce or control noise in pneumatic systems. In industrial environments, pneumatic systems such as air compressors, pneumatic tools, and pneumatic components in automated production lines can generate significant noise during operation. This noise can not only affect the comfort of the working environment but also have long-term health effects on workers. Pneumatic silencers are a common type of pneumatic noise reduction device. They are typically installed at the exhaust port of a pneumatic system or other noise sources, and absorb sound wave energy through their internal structure, thereby reducing noise. The internal structure may include porous materials or complex sound-absorbing channels.

[0003] Existing pneumatic silencers have complex structures and poor sound absorption. The complex structure increases manufacturing costs and affects subsequent inspection and maintenance. The poor sound absorption can lead to increased noise in the working environment and cause harm to the hearing of workers. Utility Model Content

[0004] The purpose of this utility model is to provide a pneumatic silencing device with the advantage of good sound absorption effect. It solves the problems of existing pneumatic silencing devices having complex structures and poor sound absorption effect during use. The complex structure increases manufacturing costs and affects subsequent inspection and maintenance. The poor sound absorption effect leads to increased noise in the working environment and causes harm to the hearing of workers.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic silencer, comprising a housing,

[0006] A cover is installed on the top of the housing, and a sound-absorbing mechanism is installed on the housing and the cover;

[0007] The inner cavity of the housing is filled with porous sound-absorbing blocks, and the porous sound-absorbing blocks have an installation channel inside to accommodate the sound-absorbing mechanism.

[0008] The silencing mechanism includes a silencing tube, which is movably installed in the installation channel. The surface of the silencing tube has sound-absorbing holes, and the inside of the silencing tube has a sound-absorbing channel. A porous sound-absorbing column is installed inside the sound-absorbing channel, and the porous sound-absorbing column is located inside the sound-absorbing holes.

[0009] As a preferred embodiment of the pneumatic silencing device of this utility model, the housing has locking holes on both the front and rear sides, and the bottom of the cover is fitted with a buckle, which is installed in the locking holes to fix the cover.

[0010] As a preferred embodiment of the pneumatic silencing device of this utility model, a positioning pin is fixedly connected to the middle of the bottom of the cover, and the positioning pin is movably connected to the inner wall of the shell.

[0011] As a preferred embodiment of the pneumatic silencing device of this utility model, the housing is provided with a first air outlet on both the left and right sides, and the cover is provided with a second air outlet on its surface.

[0012] As a preferred embodiment of the pneumatic silencing device of this utility model, the left and right sides of the inner cavity of the cover are fixedly connected with reinforcing ribs, and the bottom of the reinforcing ribs are connected to the buckle.

[0013] As a preferred embodiment of the pneumatic silencing device of this utility model, the number of sound-absorbing holes is several, and they are distributed around the surface of the silencing tube, and the sound-absorbing holes are circular.

[0014] As a preferred embodiment of the pneumatic silencing device of this utility model, the top of the silencing pipe is threaded with a first threaded connector, and the bottom of the silencing pipe is threaded with a second threaded connector. The first threaded connector extends through to the top of the cover and is threaded with a threaded sleeve. The top of the threaded sleeve is connected to an air inlet connector.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model reduces the noise of the exhaust gas through a silencing mechanism and a porous sound-absorbing block. The noise-reduced gas is discharged to the outside through the first air outlet and the second air outlet. During the operation of the silencing mechanism, the gas enters the first threaded connector through the air inlet connector and the threaded sleeve. The first threaded connector transmits the gas to the sound absorption channel. The gas moves downward inside the sound absorption channel and passes through the porous sound-absorbing column and sound-absorbing holes to enter the porous sound-absorbing block. After passing through the porous sound-absorbing block, it enters the first air outlet and the second air outlet. The second threaded connector seals the bottom of the sound absorption channel, allowing the gas to pass smoothly through several sound-absorbing holes. Attached Figure Description

[0017] Figure 1 This is the front view of the present utility model;

[0018] Figure 2 This is a front sectional view of the casing of this utility model;

[0019] Figure 3 This is a front sectional view of the cover body of this utility model;

[0020] Figure 4 This is a front view of the silencing mechanism of this utility model;

[0021] Figure 5 This is a cross-sectional view of the silencer pipe of this utility model.

[0022] In the diagram: 1. Shell; 2. Cover; 3. Silencing mechanism; 4. Clip; 5. Buckle; 6. Porous sound-absorbing block; 7. Installation channel; 8. First air outlet; 9. Second air outlet; 10. Positioning pin; 11. Reinforcing rib; 301. Silencing pipe; 302. First threaded connector; 303. Threaded sleeve; 304. Air inlet connector; 305. Second threaded connector; 306. Sound-absorbing hole; 307. Sound-absorbing channel; 308. Porous sound-absorbing column. Detailed Implementation

[0023] Please see Figures 1-5 A pneumatic silencing device includes a housing 1, a cover 2 mounted on the top of the housing 1, and a silencing mechanism 3 mounted on the housing 1 and the cover 2.

[0024] Furthermore, the inner cavity of the housing 1 is filled with a porous sound-absorbing block 6, and the porous sound-absorbing block 6 has an installation channel 7 for accommodating the sound-absorbing mechanism 3.

[0025] Furthermore, the silencing mechanism 3 includes a silencing tube 301, which is movably installed in the installation channel 7. The surface of the silencing tube 301 is provided with sound-absorbing holes 306, and the inside of the silencing tube 301 is provided with a sound-absorbing channel 307. A porous sound-absorbing column 308 is installed inside the sound-absorbing channel 307, and the porous sound-absorbing column 308 is located inside the sound-absorbing hole 306.

[0026] Furthermore, the shell 1 has locking holes 4 on both the front and rear sides, and the cover 2 has a buckle 5 installed at the bottom. The buckle 5 is installed in the locking holes 4 to fix the cover 2.

[0027] Furthermore, a positioning pin 10 is fixedly connected to the middle of the bottom of the cover 2, and the positioning pin 10 is movably connected to the inner wall of the shell 1.

[0028] Furthermore, the shell 1 has a first air outlet 8 on both the left and right sides, and the cover 2 has a second air outlet 9 on its surface.

[0029] Furthermore, reinforcing ribs 11 are fixedly connected to the left and right sides of the inner cavity of the cover 2, and the bottom of the reinforcing ribs 11 are connected to the buckle 5.

[0030] Furthermore, there are several sound-absorbing holes 306, which are distributed around the surface of the silencer tube 301, and the sound-absorbing holes 306 are circular.

[0031] Furthermore, the top of the muffler pipe 301 is threaded with a first threaded connector 302, and the bottom of the muffler pipe 301 is threaded with a second threaded connector 305. The first threaded connector 302 extends through to the top of the cover 2 and is threaded with a threaded sleeve 303. The top of the threaded sleeve 303 is connected to an air inlet connector 304.

[0032] Furthermore, the porous sound-absorbing column 308 and the porous sound-absorbing block 6 are made of EVA sound-absorbing sponge. Sound-absorbing sponge is typically made of porous, soft polymer material with many tiny fine fibers covering its surface. These fine fibers can effectively absorb sound waves and convert them into weak heat energy, thereby reducing the propagation and reflection of sound.

[0033] Furthermore, the materials for the porous sound-absorbing column 308 and the porous sound-absorbing block 6 can also be one of slag wool, glass fiber, foam plastic, melamine foam and ceramic fiber.

[0034] Furthermore, the material of the silencer tube 301 is one of plastic, stainless steel, carbon steel, aluminum, ceramic, carbon fiber composite material and glass fiber reinforced plastic.

[0035] Furthermore, the cover 2 is provided with mounting holes that mate with the first threaded connector 302.

[0036] The gas discharged from the pneumatic component enters the housing 1 through the silencing mechanism 3. The silencing mechanism 3 and the porous sound-absorbing block 6 reduce the noise of the discharged gas. The noise-reduced gas is discharged to the outside through the first air outlet 8 and the second air outlet 9. During the operation of the silencing mechanism 3, the gas enters the first threaded connector 302 through the air inlet connector 304 and the threaded sleeve 303. The first threaded connector 302 transmits the gas to the sound absorption channel 307. The gas moves downward inside the sound absorption channel 307 and passes through the porous sound-absorbing column 308 and the sound-absorbing hole 306 to enter the porous sound-absorbing block 6. After passing through the porous sound-absorbing block 6, it enters the first air outlet 8 and the second air outlet 9. The second threaded connector 305 seals the bottom of the sound absorption channel 307, allowing the gas to pass smoothly through several sound-absorbing holes 306.

[0037] The inner cavity of the sound-absorbing channel 307 is filled with porous sound-absorbing columns 308, which can effectively absorb sound wave energy. When sound waves enter the porous sound-absorbing columns 308, due to the large number of tiny pores inside the porous sound-absorbing columns 308, the sound waves will be reflected and scattered on the surface of the pores, and some of the sound energy will be converted into heat energy and consumed to absorb mid-to-high frequency noise. The sound-absorbing holes 306 opened on the surface of the silencing tube 301 are mainly used to make it easier for sound waves to enter the porous sound-absorbing block 6, and the sound-absorbing holes 306 themselves can also silence noise. The sound-absorbing holes 306 allow some sound waves to be reflected in the channel, further reducing the sound energy that is directly propagated. The porous sound-absorbing block 6 is wrapped on the surface of the silencing tube 301. The silencing tube 301 is installed in the installation channel 7 inside the porous sound-absorbing block 6, which not only adds an extra layer of sound-absorbing barrier and improves the overall sound absorption effect, but also plays a role in protecting the internal structure. The porous sound-absorbing block 6 also uses the repeated reflection of sound waves between the pores to consume sound energy, which helps to reduce low-frequency noise.

[0038] When the pneumatic silencer needs to be inspected and maintained, first press the buckle 5 inward to remove the buckle head from the buckle hole 4, then move the cover 2 upward to separate the cover 2 from the housing 1. During the separation process, the silencer mechanism 3 moves out from the inside of the installation channel 7, and the porous sound-absorbing block 6 can also be removed from the inside of the housing 1 for maintenance.

[0039] When disassembling the silencing mechanism 3, unscrew the threaded sleeve 303 from the surface of the first threaded connector 302 to disconnect the connection between the cover 2 and the silencing mechanism 3. After the silencing mechanism 3 is disassembled, the first threaded connector 302 and the second threaded connector 305 can be removed from the upper and lower ends of the silencing tube 301, and the porous sound-absorbing column 308 can be pulled out from the inside of the sound-absorbing channel 307 to achieve overall inspection and maintenance of the pneumatic silencing equipment.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic silencing device, comprising a shell (1), characterized in that: a cover (2) is mounted on the top of the shell (1), and a silencing mechanism (3) is mounted on the shell (1) and the cover (2); the inner cavity of the shell (1) is filled with porous sound-absorbing blocks (6), and an installation channel (7) for accommodating the silencing mechanism (3) is formed in the interior of the porous sound-absorbing blocks (6); the silencing mechanism (3) comprises a silencing pipe (301), which is movably installed in the installation channel (7), and the surface of the silencing pipe (301) is provided with sound-absorbing holes (306), the interior of the silencing pipe (301) is provided with a sound-absorbing channel (307), and the sound-absorbing channel (307) is installed with porous sound-absorbing columns (308) inside, and the porous sound-absorbing columns (308) are located inside the sound-absorbing holes (306). Card holes (4) are formed on the front and rear sides of the shell (1), a buckle (5) is mounted on the bottom of the cover (2), and the buckle (5) is installed in the card hole (4) to fix the cover (2). A positioning pin (10) is fixedly connected to the middle of the bottom of the cover (2), and the positioning pin (10) is movably connected with the inner wall of the shell (1). First air outlet holes (8) are formed on the left and right sides of the shell (1), and second air outlet holes (9) are formed on the surface of the cover (2).

2. A pneumatic silencing device according to claim 1, characterised in that: Reinforcing ribs (11) are fixedly connected to the left and right sides of the inner cavity of the cover (2), and the reinforcing ribs (11) are connected with the buckle (5) at the bottom.

3. A pneumatic silencing device according to claim 1, characterized in that: The number of sound-absorbing holes (306) is several, which are distributed around the surface of the silencing pipe (301), and the sound-absorbing holes (306) are circular.

4. A pneumatic silencing device according to claim 1, characterized in that: A first threaded connector (302) is threadedly connected to the top of the silencing pipe (301), a second threaded connector (305) is threadedly connected to the bottom of the silencing pipe (301), the first threaded connector (302) penetrates to the top of the cover (2) and is threadedly sleeved with a threaded sleeve (303), and the top of the threaded sleeve (303) is communicated with an air inlet connector (304).

5. A pneumatic silencing device according to claim 1, characterized in that: ​ 6. A pneumatic silencing device according to claim 1, characterized in that: ​ 7. A pneumatic silencing device according to claim 1, characterized in that: ​

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