A sound attenuating device

Abstract

This application relates to the field of noise reduction equipment technology, and provides a noise reduction device, including: a plurality of noise reduction pipes, each having a noise reduction chamber for eliminating the impact noise of exhaust from the pneumatic device's exhaust valve; the plurality of noise reduction pipes being interconnected; at least one air inlet port located on the outer surface of the noise reduction pipes, connected to the noise reduction chamber, and used to connect to the exhaust valve port of the pneumatic device; and a negative pressure generating device located on the noise reduction pipes, used to draw air from the noise reduction chambers. This invention isolates the impact noise of high-frequency airflow from the pneumatic device through the noise reduction chambers of the noise reduction pipes and discharges the high-pressure airflow outdoors, preventing the exhaust airflow from disturbing the working environment, thereby effectively reducing the noise generated by the pneumatic device's exhaust valve. Furthermore, the negative pressure environment within the noise reduction chambers buffers the impact of the airflow, further reducing noise.

Description

Technical Field

[0001] This application relates to the field of noise reduction equipment technology, and more particularly to a noise reduction device. Background Technology

[0002] In industrial production, many devices use compressed air as the power source for their drive components. During operation, these pneumatic devices discharge high-pressure air through electromagnetic exhaust valves. Factory pneumatic devices (such as cylinders, solenoid valves, and quick exhaust valves) generate high-frequency airflow noise and impact noise during exhaust, typically reaching 80-110 dB, which severely impacts the working environment.

[0003] Current noise reduction measures for pneumatic equipment typically involve implementing sound-absorbing and sound-insulating measures within the equipment itself, such as installing silencers or covering it with sound-absorbing cotton, to reduce the noise generated by the exhaust valves of the pneumatic devices. However, this noise reduction method is costly, and the high-pressure air discharged from the exhaust valves still causes some disturbance to the working environment.

[0004] Therefore, the aforementioned technical defects urgently need to be addressed. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this application is to discharge the high-frequency high-pressure airflow emitted by the pneumatic equipment to the outside, so as to avoid the exhaust airflow from disturbing the working environment, and at the same time reduce the high-frequency airflow noise generated by the exhaust valve of the pneumatic device.

[0006] The technical solution adopted by this application to solve the technical problem is as follows: A silencing device, comprising:

[0007] Several silencing pipes, each with a silencing chamber, are used to eliminate the impact noise from the exhaust valve of the pneumatic device. The several silencing pipes are connected together.

[0008] At least one air inlet port is provided on the outer surface of the silencer duct and is connected to the silencer chamber. The air inlet port is used to connect to the exhaust valve port of the pneumatic device.

[0009] And a negative pressure generating device, which is installed on the silencer pipe and is used to draw air from the silencer chamber.

[0010] In one possible implementation, an extension pipe is connected to the silencing duct, the extension pipe extends to the outside, and an exhaust port is opened at the end of the extension pipe away from the silencing duct, the exhaust port being connected to the silencing chamber.

[0011] The exhaust port is equipped with a first one-way valve, which allows unidirectional flow towards the outside.

[0012] In one possible implementation, the negative pressure generating device is installed on the extension pipe and is connected to the silencing chamber.

[0013] In one possible implementation, at least one negative pressure gauge is installed on the silencing duct, which is used to detect the negative pressure value inside the silencing chamber.

[0014] In one possible implementation, the outer surface of the air intake port is covered with sound-absorbing cotton.

[0015] In one possible implementation, a quick-release connector is provided on the air intake port, and the air intake port and the quick-release connector are interconnected. The quick-release connector is used for detachable connection with the exhaust valve port of the pneumatic device.

[0016] In one possible implementation, a second one-way valve is provided on the quick-release connector, which allows one-way flow toward the silencing chamber.

[0017] In one possible implementation, a sound-absorbing layer is provided on the inner wall of the anechoic chamber, and the sound-absorbing layer is located on the inner wall of the anechoic chamber near the air intake port.

[0018] In one possible implementation, the silencing duct is a metal duct, and two adjacent silencing ducts are screwed together.

[0019] In one possible implementation, the extension pipe is bolted to the silencer pipe.

[0020] Compared with existing technologies, this application provides a silencing device. This invention isolates the impact noise of high-frequency airflow from pneumatic equipment through the silencing chamber of the silencing pipe and discharges the high-pressure airflow outdoors, preventing the exhaust airflow from disturbing the working environment. This effectively reduces the noise generated by the exhaust valve of the pneumatic device. Furthermore, the negative pressure environment within the silencing chamber buffers the impact of the airflow, further reducing noise. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of a noise reduction device provided in this embodiment;

[0023] Figure 2 This is a schematic diagram of the overall structure of a silencer device provided in this embodiment when connected to a pneumatic device;

[0024] Figure 3 yes Figure 2 An enlarged view of the diagram marked A;

[0025] Figure 4 yes Figure 2 Enlarged diagram of the figure marked B.

[0026] In the diagram: 1. Silencing duct; 11. Silencing chamber; 12. Negative pressure gauge; 2. Air inlet port; 21. Quick-release connector; 22. Second check valve; 3. Negative pressure generating device; 4. Extension duct; 41. Exhaust port; 42. First check valve; 5. Pneumatic device exhaust valve. Detailed Implementation

[0027] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0028] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] Furthermore, the technical features involved in the different embodiments of the present invention described above can be combined with each other as long as they do not conflict with each other.

[0031] This utility model provides, for example Figure 1 , Figure 2 and Figure 3 The diagram illustrates a silencing device used to reduce the impact noise of high-frequency airflow from the exhaust valve 5 of a pneumatic device during exhaust in a production workshop. It also prevents the high-frequency airflow from the exhaust valve 5 from disturbing the working environment. The main structure includes several silencing pipes 1, at least one air inlet port 2, and a negative pressure generating device 3. Each silencing pipe 1 has a silencing chamber 11, which is used to eliminate the impact noise from the exhaust of the pneumatic device's exhaust valve 5. The several silencing pipes 1 are interconnected. In actual configuration, the connection of the silencing pipes 1 corresponds to the placement of the pneumatic devices in the production workshop. More preferably, the several silencing pipes 1 are arranged in a specific order. The air inlet port 2 is located on the outer surface of the silencing pipe 1 and is connected to the silencing chamber 11. The air inlet port 2 is used to connect to the exhaust valve port of the pneumatic device. The negative pressure generating device 3 is located on the silencing pipe 1 and is used to draw air from the silencing chamber 11. The silencing pipes 1 are configured as rigid pipes to prevent structural deformation during the silencing process.

[0032] It should be noted that current sound insulation and noise reduction measures for pneumatic equipment typically involve taking sound-absorbing and sound-insulating measures on the equipment itself, such as installing silencers or covering it with sound-absorbing cotton, to reduce the noise generated by the exhaust valve 5 of the pneumatic device. However, this traditional noise treatment method is costly, and the high-pressure air discharged from the exhaust valve still causes some disturbance to the working environment.

[0033] This invention isolates the impact noise of high-frequency airflow from pneumatic equipment through the silencing chamber 11 of the silencing pipe 1, and discharges the high-pressure airflow outdoors, preventing the exhaust airflow from disturbing the working environment. This effectively reduces the noise generated by the exhaust valve 5 of the pneumatic device. Furthermore, the negative pressure environment within the silencing chamber 11 buffers the impact of the airflow, further reducing noise. When a negative pressure environment is formed within the silencing chamber 11, the impact of the high-frequency airflow generated instantaneously by the pneumatic equipment's exhaust air is greatly reduced. Therefore, noise reduction is further effective.

[0034] Furthermore, such as Figure 1 , Figure 2 As shown, an extension pipe 4 is connected to the silencing pipe 1, and the extension pipe 4 extends to the outside. An exhaust port 41 is opened at the end of the extension pipe 4 away from the silencing pipe 1, and the exhaust port 41 is connected to the silencing chamber 11. A first one-way valve 42 is provided on the exhaust port 41, and the first one-way valve 42 is unidirectionally open in the direction of the outside.

[0035] It should be noted that the silencer duct 1, through the extension duct 4, can discharge the high-frequency airflow from the pneumatic equipment to the outdoors, thereby preventing the exhaust airflow from disturbing the working environment. The first one-way valve 42 has both an open and a closed state. When the negative pressure generating device 3 draws air from the silencer chamber 11 and creates a negative pressure environment within it, the first one-way valve 42 blocks the exhaust port 41 under the influence of the negative pressure. When multiple pneumatic devices exhaust at high frequencies, causing excessive air pressure inside the silencer duct 1, the first one-way valve 42 opens under the influence of the air pressure, allowing the high-frequency airflow to be smoothly discharged outdoors.

[0036] It is understood that the specific function of the first one-way valve 42 in this embodiment is something that those skilled in the art can obtain based on existing technology, and the structure and working principle of the first one-way valve 42 will not be described in detail here.

[0037] Furthermore, such as Figure 1 , Figure 2 As shown, the negative pressure generating device 3 is installed on the extension pipe 4 and is connected to the silencing chamber 11. It is understood that, to avoid noise generated by the negative pressure generator during operation affecting the indoor environment, the negative pressure generator is actually installed outdoors. Therefore, in this embodiment, the negative pressure generating device 3 is installed on the extension pipe 4 to draw air from inside the silencing chamber 11, creating a negative pressure environment within the chamber.

[0038] Furthermore, such as Figure 1 , Figure 2 As shown, at least one negative pressure gauge 12 is installed on the silencing duct 1. The negative pressure gauge 12 is used to detect the negative pressure value inside the silencing chamber 11. It is understood that by installing the negative pressure gauge 12 on the silencing duct 1, operators can observe and detect the negative pressure value inside the silencing chamber 11. More preferably, a pressure sensor is installed inside the silencing chamber 11 to detect the negative pressure inside the silencing chamber 11. This allows the device to adjust the operation of the negative pressure generator.

[0039] Furthermore, the outer surface of the air intake port 2 is covered with sound-absorbing cotton. Understandably, the sound-absorbing cotton can further insulate the air intake port 2.

[0040] Furthermore, such as Figure 2 , Figure 4 As shown, a quick-release connector 21 is provided on the air inlet port 2. The air inlet port 2 and the quick-release connector 21 are interconnected. The quick-release connector 21 is used for detachable connection with the exhaust valve port of the pneumatic device. It is understandable that providing the quick-release connector 21 on the air inlet port 2 facilitates the installation and removal of pneumatic equipment by operators, thereby improving the scheduling efficiency of the production line.

[0041] Furthermore, the quick-release connector 21 is equipped with a second one-way valve 22, which unidirectionally flows towards the silencing chamber 11. Understandably, after the pneumatic equipment is disassembled, the second one-way valve 22 on the air inlet port 2 can seal the current air inlet port 2 under the action of the elastic element. This is to prevent air leakage that could lead to high-frequency airflow leakage and noise.

[0042] It is understood that the specific function of the second check valve 22 in this embodiment is something that those skilled in the art can obtain based on the prior art, and the structure and working principle of the second check valve 22 will not be described in detail here.

[0043] Furthermore, a sound-absorbing layer is provided on the inner wall of the silencing chamber 11, and the sound-absorbing layer is located on the inner wall of the silencing chamber 11 near the air inlet port 2. It can be understood that the sound-absorbing layer provided on the inner wall of the silencing chamber 11 can further reduce the high-frequency airflow impact noise of the pneumatic equipment during exhaust.

[0044] Furthermore, the silencing pipe 1 is a metal pipe, and two adjacent silencing pipes 1 are screwed together.

[0045] Furthermore, the extension pipe 4 is screwed to the silencer pipe 1. Understandably, the screwed connection structure facilitates the disassembly and assembly of the silencer pipe 1, allowing for subsequent additions or reductions in the number of silencer pipes 1.

[0046] In summary, this application provides a noise reduction device. This invention isolates the impact noise of high-frequency airflow from pneumatic equipment through the noise reduction chamber 11 of the noise reduction pipe 1, and discharges the high-pressure airflow outdoors, preventing the exhaust airflow from disturbing the working environment. This effectively reduces the noise generated by the exhaust valve 5 of the pneumatic device. Furthermore, the negative pressure environment within the noise reduction chamber 11 buffers the impact of the airflow, further reducing noise.

[0047] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A noise reduction device, characterized in that, include: Several silencing pipes, each silencing pipe having a silencing chamber, the silencing chamber being used to eliminate the impact noise of the exhaust valve of the pneumatic device, the several silencing pipes being connected to each other; At least one air inlet port is provided on the outer surface of the silencer duct, the air inlet port is connected to the silencer chamber, and the air inlet port is used to connect to the exhaust valve port of the pneumatic device; And a negative pressure generating device, which is installed on the silencing pipe and is used to draw air from the silencing chamber.

2. The silencing device according to claim 1, characterized in that, The silencing duct is connected to an extension duct that extends to the outside. An exhaust port is provided at the end of the extension duct away from the silencing duct, and the exhaust port is connected to the silencing chamber. The exhaust port is equipped with a first one-way valve, which is open to the outside.

3. The silencing device according to claim 2, characterized in that, The negative pressure generating device is installed on the extended pipe and is connected to the silencing chamber.

4. The silencing device according to claim 1, characterized in that, At least one negative pressure gauge is installed on the silencing pipe, and the negative pressure gauge is used to detect the negative pressure value in the silencing chamber.

5. A silencing device according to claim 1, characterized in that, The outer surface of the air intake port is covered with sound-absorbing cotton.

6. A silencing device according to claim 1, characterized in that, The air intake port is provided with a quick-release connector, and the air intake port and the quick-release connector are interconnected. The quick-release connector is used to detachably connect to the exhaust valve port of the pneumatic device.

7. A silencing device according to claim 6, characterized in that, The quick-release connector is equipped with a second one-way valve, which allows one-way flow towards the silencing chamber.

8. A silencing device according to claim 1, characterized in that, A sound-absorbing layer is provided on the inner wall of the silencing chamber, and the sound-absorbing layer is located on the inner wall of the silencing chamber near the air inlet.

9. A silencing device according to claim 1, characterized in that, The silencing pipe is a metal pipe, and two adjacent silencing pipes are screwed together.

10. A silencing device according to claim 2, characterized in that, The extension pipe is screwed to the silencer pipe.

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