High-temperature-resistant pipeline type silencer

Abstract

The utility model relates to the technical field of silencers, and discloses a high temperature resistant pipeline type silencer, which comprises a static pressure box and a sound absorption sheet, the inside of the static pressure box is fixedly connected with a silencing pipe, the inside of the silencing pipe is fixedly connected with the sound absorption sheet, the back surface of the silencing pipe is fixedly connected with a fixing device, the sound absorption sheet comprises a sound absorption body, and the fixing device is fixedly connected with the sound absorption body. The front face and the back face of the sound absorption body are fixedly connected with a flow guide cover, air grooves are formed in the two sides of the interior of the sound absorption body, micro-penetrating holes are formed in the two sides of the sound absorption body, and the micro-penetrating holes are evenly distributed and communicate with the air grooves. Air flow enters the silencer and is separated by the sound absorption sheets, sound enters the air grooves through the micro-perforated holes, the micro-perforated plate where the micro-perforated holes are located and the air grooves form a resonance sound absorption structure, the sound is absorbed, the sound absorption sheets are simple in structure, easy to clean and resistant to high temperature, and the silencer can be used in a high-temperature environment easily.

Description

Technical Field

[0001] This utility model relates to the field of silencer technology, and more specifically to a high-temperature resistant pipeline silencer. Background Technology

[0002] A silencer is a device used to reduce noise, primarily by reducing airflow noise. Silencers can be divided into two types: resistive silencers and reactive silencers. Resistive silencers typically use sound-absorbing linings, while reactive silencers utilize sudden changes in the cross-sectional area of ​​the duct to achieve noise reduction. Duct silencers are devices that reduce noise in ducts and are suitable for ventilation and air conditioning systems in industrial and civil buildings. They are suitable for medium and low-pressure gas transmission systems and can be installed at the inlet and outlet of fans, in gas transmission ducts, and at air inlets and outlets. Their working principle is to allow airflow by blocking sound transmission, thereby eliminating noise.

[0003] Currently, the use of duct-type silencers is mostly in high-temperature scenarios, and most existing duct-type silencers use cotton sound-absorbing materials to reduce noise, which is not conducive to use at high temperatures; secondly, duct-type silencers are prone to accumulating impurities after long-term use, and silencers are mostly one-piece structures, which are inconvenient to clean. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-temperature resistant pipeline silencer to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: a high-temperature resistant pipeline silencer, comprising a static pressure box and a sound-absorbing sheet. A silencer tube is fixedly connected inside the static pressure box, and a sound-absorbing sheet is fixedly connected inside the silencer tube. A fixing device is fixedly connected to the back of the silencer tube. The sound-absorbing sheet comprises a sound-absorbing body, and a flow guide is fixedly connected to the front and back of the sound-absorbing body. Air grooves are opened on both sides inside the sound-absorbing body, and micro-perforations are opened on both sides of the sound-absorbing body. The micro-perforations are evenly distributed and communicate with the air grooves.

[0006] Furthermore, the sound-absorbing sheets are evenly distributed inside the silencer tube, the flow guide shroud has an arc-shaped or wedge-shaped structure, and the internal air slots of the sound-absorbing body are provided with hard wall plates that are not interconnected.

[0007] Furthermore, the static pressure box includes a box body with a structure that connects the front and back sides. Sound-absorbing liners are fixedly connected to the inner sides, top, and bottom of the box body. The sound-absorbing liners are made of high-temperature resistant material. Mounting holes are provided on both sides of the back of the box body, and the mounting holes are evenly distributed.

[0008] Furthermore, the silencer pipe includes a pipe body, and sound-absorbing holes are provided on both sides and at the top and bottom of the pipe body. The sound-absorbing holes are evenly distributed. A first connecting flange is fixedly connected to the front of the pipe body. The front of the first connecting flange is provided with evenly distributed connecting holes around its perimeter. The back of the pipe body is provided with evenly distributed fixing holes on both sides.

[0009] Furthermore, the fixing device includes a mounting plate, a connecting bracket is fixedly connected to the back of the mounting plate, and fixing bolts are fixedly connected to both sides of the back of the mounting plate at positions on both sides of the connecting bracket.

[0010] Furthermore, a second connecting flange is fixedly connected to the back of the connecting bracket. The second connecting flange has the same structure as the first connecting flange. The fixing bolts and mounting holes are mutually compatible.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. This utility model incorporates sound-absorbing sheets. When airflow enters the silencer, it is separated by the sound-absorbing sheets. Sound enters the air groove through micro-perforations. The micro-perforated plate containing the micro-perforations and the air groove form a resonant sound-absorbing structure, which absorbs the sound. Furthermore, the sound-absorbing sheets have a simple structure, are easy to clean, and are resistant to high temperatures, which is beneficial for the silencer to be used in high-temperature environments.

[0013] 2. This utility model features a fixing device. By removing the fixing bolts, the fixing device can be disconnected from the static pressure box and the silencer pipe, allowing the silencer pipe to be removed from the static pressure box for cleaning. After cleaning, the silencer pipe is placed back into the static pressure box, and the mounting plate is fixed to the pipe body by the fixing bolts engaging with the fixing holes. The mounting plate is then fixed to the box body by the fixing bolts engaging with the mounting holes, and finally, the silencer pipe is fixed to the static pressure box. This facilitates quick and easy disassembly of the silencer, enabling cleaning of the silencer and preventing excessive buildup of impurities inside the silencer pipe that could affect its noise reduction effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a cross-sectional structural diagram of the sound-absorbing sheet of this utility model.

[0016] Figure 3 This is a structural schematic diagram of the back view of the silencer pipe of this utility model.

[0017] Figure 4 This is a cross-sectional structural schematic diagram of the rear view of the static pressure box of this utility model.

[0018] The attached figures are labeled as follows: 1. Static pressure box; 101. Box body; 102. Sound-absorbing lining; 103. Mounting hole; 2. Silencer pipe; 201. Pipe body; 202. Sound-absorbing hole; 203. First connecting flange; 204. Connecting hole; 3. Sound-absorbing sheet; 301. Sound-absorbing body; 302. Flow guide; 303. Air duct; 304. Micro-perforation; 4. Fixing device; 401. Mounting plate; 402. Connecting bracket; 403. Fixing bolt; 404. Second connecting flange. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The high-temperature resistant pipe-type silencer involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Reference Figures 1-4 This utility model provides a high-temperature resistant pipe-type silencer, including a static pressure box 1 and a sound-absorbing plate 3. A silencer pipe 2 is fixedly connected inside the static pressure box 1, and a sound-absorbing plate 3 is fixedly connected inside the silencer pipe 2. A fixing device 4 is fixedly connected to the back of the silencer pipe 2. The sound-absorbing plate 3 includes a sound-absorbing body 301, and a flow guide shroud 302 is fixedly connected to the front and back of the sound-absorbing body 301. Air grooves 303 are opened on both sides of the sound-absorbing body 301. Micro-perforations 304 are opened on both sides of the sound-absorbing body 301. The micro-perforations 304 are evenly distributed and connected to the air grooves 303. When the airflow enters the silencer, it is separated by the sound-absorbing plate 3. The sound enters the air groove 303 through the micro-perforations 304. The micro-perforated plate where the micro-perforations 304 are located and the air groove 303 form a resonant sound-absorbing structure, which absorbs the sound. Moreover, the sound-absorbing plate 3 has a simple structure, is easy to clean, and is resistant to high temperatures, which is beneficial for the silencer to be used in high-temperature environments.

[0021] In a preferred embodiment, the sound-absorbing sheets 3 are evenly distributed inside the silencer tube 2, the flow guide shroud 302 has an arc-shaped or wedge-shaped structure, and the internal air slots 303 of the sound-absorbing body 301 are provided with hard wall plates that are not connected to each other.

[0022] In a preferred embodiment, the static pressure box 1 includes a box body 101, which has a structure with the front and back sides connected. Sound-absorbing liners 102 are fixedly connected to the inner sides, top and bottom of the box body 101. The sound-absorbing liners 102 are made of high-temperature resistant material. Mounting holes 103 are opened on both sides of the back side of the box body 101. The mounting holes 103 are evenly distributed. The box body 101 has an integral cut structure with smooth inner and outer walls and high ventilation efficiency, which helps to maintain smooth ventilation and reduce the accumulation of oil stains and impurities.

[0023] In a preferred embodiment, the silencer pipe 2 includes a pipe body 201, with sound-absorbing holes 202 evenly distributed on both sides and at the top and bottom of the pipe body 201. A first connecting flange 203 is fixedly connected to the front of the pipe body 201, with evenly distributed connecting holes 204 around the front of the first connecting flange 203, and evenly distributed fixing holes on both sides of the back of the pipe body 201.

[0024] In a preferred embodiment, the fixing device 4 includes a mounting plate 401, a connecting bracket 402 is fixedly connected to the back of the mounting plate 401, and fixing bolts 403 are fixedly connected to both sides of the back of the mounting plate 401 at positions on both sides of the connecting bracket 402.

[0025] In a preferred embodiment, a second connecting flange 404 is fixedly connected to the back of the connecting bracket 402. The second connecting flange 404 has the same structure as the first connecting flange 203. The fixing bolt 403 and the mounting hole 103 are mutually compatible. By removing the fixing bolt 403, the connection between the fixing device 4 and the static pressure box 1 and the silencer pipe 2 is disconnected, allowing the silencer pipe 2 to be removed from the static pressure box 1 for cleaning. After cleaning, the silencer pipe 2 is placed back into the static pressure box 1. The mounting plate 401 is fixed to the pipe body 201 by the fixing bolt 403 engaging with the mounting hole, and the mounting plate 401 is fixed to the box body 101 by the fixing bolt 403 engaging with the mounting hole 103. Then, the silencer pipe 2 is fixed to the static pressure box 1. This facilitates quick and easy disassembly of the silencer for cleaning, preventing excessive impurities from adhering inside the silencer pipe 2 and affecting the silencing effect.

[0026] The working principle of this utility model:

[0027] The airflow entering the silencer is separated by the guide shroud 302 of the sound-absorbing plate 3. The sound enters the air groove 303 through the micro-perforations 304. The micro-perforated plate where the micro-perforations 304 are located and the air groove 303 form a resonant sound-absorbing structure, which absorbs the sound. The sound-absorbing plate 3 has a simple structure, is easy to clean, and is resistant to high temperatures, which is beneficial for the silencer to be used in high-temperature environments. When the airflow passes through the inner wall of the tube 201, it enters the air layer between the box 101 and the tube 201 through the sound-absorbing holes 202, absorbing part of the sound. At the same time, the sound-absorbing lining 102 absorbs another part of the sound, which significantly reduces noise. The box 101 is a one-piece cut structure with smooth inner and outer walls and high ventilation efficiency, which is conducive to maintaining smooth ventilation and reducing the accumulation of oil stains and impurities.

[0028] By removing the fixing bolt 403, the connection between the fixing device 4 and the static pressure box 1 and the silencer pipe 2 is disconnected, allowing the silencer pipe 2 to be removed from the static pressure box 1 for cleaning. After cleaning, the silencer pipe 2 is placed back into the static pressure box 1. The mounting plate 401 is fixed to the pipe body 201 by the fixing bolt 403 engaging with the fixing hole, and the mounting plate 401 is fixed to the box body 101 by the fixing bolt 403 engaging with the mounting hole 103. Then, the silencer pipe 2 is fixed to the static pressure box 1. This facilitates quick and easy disassembly of the silencer for cleaning, preventing excessive buildup of impurities inside the silencer pipe 2 from affecting the silencing effect.

[0029] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., 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 high-temperature-resistant duct silencer comprising a static pressure box (1) and an acoustic absorption sheet (3), characterized in that: The interior of the static pressure tank (1) is fixedly connected with a sound absorbing pipe (2), the interior of the sound absorbing pipe (2) is fixedly connected with a sound absorbing sheet (3), the back of the sound absorbing pipe (2) is fixedly connected with a fixing device (4), the sound absorbing sheet (3) comprises a sound absorbing body (301), the front and back of the sound absorbing body (301) are fixedly connected with a flow guide cover (302), both sides of the interior of the sound absorbing body (301) are provided with air grooves (303), both sides of the sound absorbing body (301) are provided with micro-perforations (304), the micro-perforations (304) are uniformly distributed and communicate with the air grooves (303).

2. A high temperature resistant tubular muffler according to claim 1, characterized in that: The sound absorbing sheet (3) is uniformly distributed in the interior of the sound absorbing pipe (2), the structure of the flow guide cover (302) is a circular arc type or a sharp split type, and the interior of the sound absorbing body (301) is provided with hard wall plates between the air grooves (303) and is not communicated with each other.

3. A high temperature resistant tubular muffler according to claim 1, characterized in that: The static pressure tank (1) comprises a tank body (101), the structure of the tank body (101) is a structure with the front and back communicated, both sides and the top and bottom of the interior of the tank body (101) are fixedly connected with sound absorbing linings (102), the sound absorbing linings (102) are made of high-temperature resistant materials, both sides of the back of the tank body (101) are provided with mounting holes (103), and the mounting holes (103) are uniformly distributed.

4. A high temperature resistant tubular muffler according to claim 3, characterized in that: The sound absorbing pipe (2) comprises a pipe body (201), both sides and the top and bottom of the pipe body (201) are provided with sound absorbing holes (202), the sound absorbing holes (202) are uniformly distributed, the front of the pipe body (201) is fixedly connected with a first connecting flange (203), the front of the first connecting flange (203) is provided with uniformly distributed connecting holes (204) around, and both sides of the back of the pipe body (201) are provided with uniformly distributed fixing holes.

5. A high temperature resistant tubular muffler according to claim 4, characterized in that: The fixing device (4) comprises a mounting plate (401), the back of the mounting plate (401) is fixedly connected with a connecting support (402), and both sides of the back of the mounting plate (401) are fixedly connected with fixing bolts (403) at both sides of the connecting support (402).

6. A high temperature resistant tubular muffler according to claim 5, characterized in that: The back of the connecting support (402) is fixedly connected with a second connecting flange (404), the second connecting flange (404) is the same in structure as the first connecting flange (203), the fixing bolts (403) and the mounting holes (103) are matched with each other, and the fixing bolts (403) and the fixing holes are matched with each other.

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