Silencer for a suction drier

Abstract

The utility model relates to the technical field of silencer, especially a kind of adsorption type drying machine's silencer, the right side of sound-absorbing panel is attached with rotating block, and sound-absorbing panel outer wall is inserted with pipeline.This adsorption type drying machine's silencer, when the high-pressure gas stream of adsorption type drying machine regenerating tower emptying flows through polyester fiber sound-absorbing panel and sound-absorbing panel through pipeline, polyester fiber sound-absorbing panel can absorb high-frequency noise, airflow is forced to disperse into multiple conical holes, reduce the generation of high-frequency eddy current noise, to a certain extent, can improve the effect of silencing, servo motor output shaft rotation drives first bevel gear rotation and thus drives second bevel gear rotation, second bevel gear rotation drives rotating block rotation, so that more conical holes on sound-absorbing panel are exposed, increase opening, to realize timely response adsorption type drying machine air treatment capacity dynamic change with production load, reduce the situation of regenerating gas quantity excess or deficiency.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction devices, specifically a noise reduction device for an adsorption dryer. Background Technology

[0002] Adsorption dryers are devices that use the properties of adsorbents to adsorb moisture and reduce the moisture content in compressed air. In order to maintain social harmony, promote ecological civilization, reduce surrounding noise pollution, and protect the health of employees, it is essential to reduce the venting noise of adsorption dryers and other similar equipment.

[0003] For example, an adsorption dryer deceleration and noise reduction device, as disclosed in announcement number "CN219778513U," uses a sound-absorbing plate with sound-absorbing holes and a rotating adjustment block. Based on the working principle of adsorption dryers, and while ensuring the output and quality of compressed air, this device is installed on the flange of the original silencer's pre-silencer pipeline to reduce the original silencer's venting noise. However, while the porous structure of this device is more effective at attenuating low- and mid-frequency noise, it has lower absorption efficiency for high-frequency pulse noise. When the high-frequency pulse noise generated by the adsorption dryer during venting cannot be absorbed, reducing the silencing effect. Furthermore, the air handling capacity of the adsorption dryer dynamically changes with the production load, and manual adjustment suffers from response lag, easily leading to excess or insufficient regeneration air. Utility Model Content

[0004] The purpose of this invention is to address the problem that while porous structures are more effective at reducing low- and mid-frequency noise, they have lower absorption efficiency for high-frequency pulse noise. When the high-frequency pulse noise generated by the adsorption dryer is released, it cannot be absorbed, thus reducing the noise reduction effect. At the same time, the air handling capacity of the adsorption dryer changes dynamically with the production load, and manual adjustment has a response lag, which can easily lead to an excess or deficiency of regeneration gas. Therefore, this invention proposes a noise reduction device for adsorption dryers.

[0005] To achieve the above objectives, this utility model provides the following technical solution: Design a noise reduction device for an adsorption dryer, including a pipe and a shell. The shell is fixedly connected to the inner wall of the pipe. An adjustment structure is provided inside the shell. A noise reduction structure is provided inside the pipe. The noise reduction structure includes a noise reduction plate. A polyester fiber sound-absorbing plate is bonded to the left side of the noise reduction plate. Multiple conical holes are processed on the inner wall of the noise reduction plate. The right side of the noise reduction plate is attached to a rotating block. The outer wall of the noise reduction plate is inserted into the pipe.

[0006] Preferably, adjacent pipes are connected by flanges and gaskets, and a first sealing door is installed on the front side of the housing.

[0007] Preferably, the adjustment structure includes a servo motor, an airflow sensor, and a noise sensor. A first bevel gear is fixedly connected to the end of the output shaft of the servo motor. The outer wall of the first bevel gear meshes with a second bevel gear. The outer walls of the transmission shafts of the first and second bevel gears are rotatably connected to the housing through sealed bearings. The outer walls of the output shaft of the servo motor are rotatably connected to the pipe and the fixed plate respectively through sealed bearings.

[0008] Preferably, the airflow sensor is installed on the inner wall of the pipe, and the end of the second bevel gear drive shaft is fixedly connected to the rotating block.

[0009] Preferably, the outer wall of the fixing plate is connected to the servo motor by multiple bolts, and the noise sensor is installed on the outer wall of the pipe.

[0010] Preferably, a second sealing door is installed on the outside of the pipe.

[0011] The present invention proposes a noise reduction device for an adsorption dryer, which has the following advantages: through the cooperation of the pipeline and the noise reduction structure, when the high-pressure airflow released from the regeneration tower of the adsorption dryer flows through the pipeline and passes through the polyester fiber sound-absorbing plate and the noise reduction plate, the polyester fiber sound-absorbing plate can absorb high-frequency noise, and the airflow is forcibly dispersed into multiple conical holes, reducing the generation of high-frequency eddy noise, and to a certain extent, improving the noise reduction effect.

[0012] By coordinating the piping and regulating structure, a noise sensor can determine whether the flow rate is normal. When the noise level is higher than the threshold, the flow rate on the PLC controller can be observed. When the flow rate is lower than the threshold of the airflow sensor, the external PLC controller starts the servo motor (with a self-locking function). The servo motor output shaft rotates, driving the first bevel gear to rotate, which in turn drives the second bevel gear to rotate. The rotation of the second bevel gear drives the rotating block to rotate, exposing more of the conical holes on the silencer plate and increasing the opening size. When the flow rate is higher than the threshold of the airflow sensor, the PLC controller starts the servo motor, exposing less of the conical holes on the silencer plate and reducing the opening size. This allows for timely response to the dynamic changes in the air handling capacity of the adsorption dryer with the production load, reducing the possibility of excess or insufficient regeneration gas. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A partial front sectional view; Figure 3 for Figure 2 A magnified view of part A in the diagram; Figure 4 for Figure 2 A partial right-side sectional view; Figure 5 for Figure 2 A partial left-side sectional view; Figure 6 for Figure 5 A partial right-side sectional view.

[0014] In the diagram: 1. Pipe, 2. Silencing structure, 201. Silencing plate, 202. Conical hole, 203. Polyester fiber sound-absorbing plate, 3. Shell, 4. Rotating block, 5. Adjustment structure, 501. Servo motor, 502. First bevel gear, 503. Second bevel gear, 504. Airflow sensor, 505. Fixing plate, 506. Noise sensor, 6. First sealing door, 7. Second sealing door. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings: See attached document Figure 1-6 In this embodiment, a noise reduction device for an adsorption dryer includes a pipe 1 and a housing 3. The housing 3 is fixedly connected to the inner wall of the pipe 1. The pipe 1 is the pipe before the original silencer of the adsorption dryer. An adjustment structure 5 is provided inside the housing 3. A noise reduction structure 2 is provided inside the pipe 1. The noise reduction structure 2 includes a noise reduction plate 201. A polyester fiber sound-absorbing plate 203 is bonded to the left side of the noise reduction plate 201. Multiple conical holes 202 are processed on the inner wall of the noise reduction plate 201. The right side of the noise reduction plate 201 is attached to the rotating block 4. The outer wall of the noise reduction plate 201 is inserted into the pipe 1.

[0016] Adjacent pipes 1 are connected by flanges and gaskets. A first sealing door 6 is installed on the front side of the housing 3. An airflow flow sensor 504 is installed on the inner wall of pipe 1. The airflow flow sensor 504 is a MEMS flow sensor. The end of the drive shaft of the second bevel gear 503 is fixedly connected to the rotating block 4. The outer wall of the fixing plate 505 is threadedly connected to the servo motor 501 by multiple bolts. A noise sensor 506 is installed on the outer wall of pipe 1. The noise sensor 506 is an FKT-ZY noise sensor. A second sealing door 7 is installed on the outer side of pipe 1.

[0017] The adjustment structure 5 includes a servo motor 501, an airflow sensor 504, and a noise sensor 506. A first bevel gear 502 is fixedly connected to the end of the output shaft of the servo motor 501. The outer wall of the first bevel gear 502 meshes with a second bevel gear 503. The outer walls of the transmission shafts of the first bevel gear 502 and the second bevel gear 503 are rotatably connected to the housing 3 through sealed bearings. The outer walls of the output shaft of the servo motor 501 are rotatably connected to the pipe 1 and the fixed plate 505 respectively through sealed bearings. The rotation of the output shaft of the servo motor 501 drives the first bevel gear 502 to rotate, thereby driving the second bevel gear 503 to rotate. The rotation of the second bevel gear 503 drives the rotating block 504 to rotate.

[0018] Working principle: When using the silencer device for an adsorption dryer: When the high-pressure airflow vented from the regeneration tower of the adsorption dryer flows through pipe 1 and passes through polyester fiber sound-absorbing plate 203 and sound-absorbing plate 201, the polyester fiber sound-absorbing plate 203 can absorb high-frequency noise, and the airflow is forcibly dispersed into multiple conical holes 202, reducing the generation of high-frequency eddy current noise and improving the sound-absorbing effect to a certain extent. The airflow sensor 504 (preset flow threshold) can detect the airflow velocity behind the muffler 201 in real time. The built-in chip can convert the flow velocity into "volume flow rate" and convert it into a digital signal to be transmitted to the external PLC controller. The noise sensor 506 (preset noise threshold) can collect the noise value (e.g., 78dB) on the outer wall of pipe 1 in real time, filter out low-frequency background noise (e.g., workshop fan noise), and retain only the noise data vented inside pipe 1. It is also transmitted to the external PLC controller. After receiving the sensor data, the external PLC controller performs a "threshold comparison" through a preset algorithm to determine whether the current state needs to be adjusted. The noise sensor 506 can determine whether the flow rate is normal. When the noise is higher than the threshold, the flow rate on the PLC controller can be observed. When the flow rate is lower than the threshold of the airflow sensor 504, the external PLC controller starts the servo motor 501 (with a self-locking function). The output shaft of the servo motor 501 rotates, which drives the first bevel gear 502 to rotate, thereby driving the second bevel gear 503 to rotate. The rotation of the second bevel gear 503 drives the rotating block 504 to rotate, so that more of the conical hole 202 on the silencer plate 201 is exposed, increasing the opening. When the flow rate is higher than the threshold of the airflow sensor 504, the PLC controller starts the servo motor 501 to make the tapered hole 202 on the muffler plate 201 less exposed and reduce the opening. During the adjustment process, once the noise from the noise sensor 506 is normal, the servo motor 501 can be turned off. When the flow rate is normal, it indicates that the silencer plate 201 or the original silencer of the adsorption dryer may be faulty. Repairing it will enable timely response to the dynamic changes in the air handling capacity of the adsorption dryer with the production load, and reduce the situation of excess or insufficient regeneration gas. When the muffler 201 needs to be replaced, simply rotate the multiple bolts to disassemble the flange and replace it. When the first bevel gear 502 and the second bevel gear 503 need to be repaired or maintained, simply open the second sealing door 7 and the first sealing door 6 to perform the repair or maintenance.

[0019] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A noise reduction device for an adsorption dryer, comprising a pipe (1) and a shell (3), wherein the shell (3) is fixedly connected to the inner wall of the pipe (1), characterized in that: The housing (3) is provided with an adjustment structure (5) inside, and the pipe (1) is provided with a sound-absorbing structure (2) inside. The sound-absorbing structure (2) includes a sound-absorbing plate (201). A polyester fiber sound-absorbing plate (203) is bonded to the left side of the sound-absorbing plate (201). Multiple conical holes (202) are processed on the inner wall of the sound-absorbing plate (201). The right side of the sound-absorbing plate (201) is attached to the rotating block (4). The outer wall of the sound-absorbing plate (201) is inserted into the pipe (1).

2. The silencing device for the adsorption dryer according to claim 1, characterized in that: The adjacent pipes (1) are connected by flanges and gaskets, and a first sealing door (6) is installed on the front side of the housing (3).

3. The silencing device for the adsorption dryer according to claim 1, characterized in that: The adjustment structure (5) includes a servo motor (501), an airflow sensor (504), and a noise sensor (506). The output shaft end of the servo motor (501) is fixedly connected to a first bevel gear (502). The outer wall of the first bevel gear (502) meshes with a second bevel gear (503). The outer walls of the transmission shafts of the first bevel gear (502) and the second bevel gear (503) are rotatably connected to the housing (3) through sealed bearings. The outer walls of the output shaft of the servo motor (501) are rotatably connected to the pipe (1) and the fixed plate (505) respectively through sealed bearings.

4. The noise reduction device for the adsorption dryer according to claim 3, characterized in that: The airflow sensor (504) is installed on the inner wall of the pipe (1), and the end of the drive shaft of the second bevel gear (503) is fixedly connected to the rotating block (4).

5. The noise reduction device for the adsorption dryer according to claim 3, characterized in that: The outer wall of the fixing plate (505) is connected to the servo motor (501) by multiple bolts, and the noise sensor (506) is installed on the outer wall of the pipe (1).

6. The silencing device for the adsorption dryer according to claim 1, characterized in that: A second sealing door (7) is installed on the outside of the pipe (1).

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