Simple pressure-bearing intake muffler

Abstract

The application discloses a simple pressure-bearing air inlet silencer, which comprises a cavity, an air inlet assembly, an air outlet pipe, two layers of perforated plates and a drainage port; the air inlet assembly is installed on the left side wall of the cavity, the air outlet pipe is installed on the right side wall of the cavity, the two layers of perforated plates are fixed in parallel inside the cavity and divide the cavity into first, second and third silencing cavities, and the drainage port is arranged at the lower part of the cavity. The application adopts a three-stage resistance silencing structure, can effectively attenuate middle and low frequency noises, and can strengthen high frequency silencing effect after filling with sound-absorbing cotton; the cavity adopts a steel plate welding structure, can bear a working pressure of 0-1.6 MPa, the number of air inlets and outlets can be adjusted as required, is suitable for multiple specifications of pressure-bearing equipment; the bottom is provided with the drainage port to drain condensed water, so that corrosion and silencing performance attenuation are avoided. The silencer has simple structure, convenient manufacturing, strong pressure-bearing capacity and wide application range, and is suitable for air inlet silencing of industrial pressure-bearing equipment such as gas storage tanks and air compressors.

Description

Technical Field

[0001] This invention belongs to the field of industrial pressure equipment intake silencing technology, specifically relating to a simple pressure-bearing intake silencer. Background Technology

[0002] In industrial production settings, pressure equipment such as air tanks, air compressors, and vacuum pumps generate high-intensity aerodynamic noise during the air intake process. The sound pressure level typically reaches 100-120 dB(A), with peak frequencies concentrated in the 500 Hz to 2 kHz range. This type of noise not only severely pollutes the factory working environment and damages the hearing health of operators with prolonged exposure, but also easily causes equipment vibration, affecting the equipment's operational stability and service life.

[0003] Existing pressurized intake silencers have several shortcomings in practical applications: First, their overall structure is complex, with a large number of components, complicated manufacturing and assembly processes, and high production costs; second, the number of air inlets and outlets is fixed and cannot be flexibly adjusted according to the airflow requirements of different equipment, thus limiting their applicability; third, most silencers do not have a dedicated drainage structure, and condensate generated by airflow easily accumulates inside the cavity, which weakens the noise reduction effect and corrodes the cavity and internal components, shortening the service life of the equipment. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a simple pressurized air intake silencer that can adjust the intake and exhaust air volume according to working conditions, has a stable and reliable noise reduction effect, and also has a condensate drainage function.

[0005] This invention is achieved through the following technical solution: A simple pressure-bearing air intake silencer includes a cavity, at least one air intake component, at least one air outlet pipe, two perforated plates, and a drain outlet; the air intake component is installed on the left side wall of the cavity, and the air outlet pipe is installed on the right side wall of the cavity; the two perforated plates are fixed parallel to each other inside the cavity, dividing the internal space of the cavity into a first silencer cavity, a second silencer cavity, and a third silencer cavity in sequence; the drain outlet is located at the lower part of the cavity.

[0006] Furthermore, the air intake assembly includes an air intake pipe, an air intake pipe connector, and a perforated pipe; the air intake pipe is fixedly connected to the left side wall of the cavity through the air intake pipe connector, the perforated pipe is fixed to the inner end of the air intake pipe that extends into the cavity, and the perforated pipe is located inside the first silencing cavity.

[0007] Furthermore, the perforated tube wall and the two layers of perforated plates are uniformly distributed with through holes, the diameter of which is 3mm to 5mm, and the opening rate of the perforated tube and the perforated plates is 20% to 30%.

[0008] Furthermore, the intake pipe connector is a flange connection connector or a threaded connection connector.

[0009] Furthermore, the cavity is a cylindrical sealed cavity, welded from steel plates with a thickness of 3mm to 8mm, and the rated working pressure range of the cavity is 0 to 1.6MPa.

[0010] Furthermore, the volume ratio of the first anechoic cavity, the second anechoic cavity, and the third anechoic cavity is 1:1.5:1.

[0011] Furthermore, the gap between the inner wall of the cavity and the perforated plate is filled with sound-absorbing cotton, which is glass wool or rock wool, and the thickness of the sound-absorbing cotton is 20mm~50mm.

[0012] Furthermore, a drain control valve is installed at the drain outlet, which is either a manual ball valve or an automatic drain valve.

[0013] Furthermore, the number of air intake components and air outlet pipes are matched, and the number of air intake components and air outlet pipes is set to 1 to 4.

[0014] Furthermore, sealing end caps are welded to both the left and right ends of the cavity, the air intake assembly is installed on the sealing end cap on the left side, and the air outlet pipe is installed on the sealing end cap on the right side.

[0015] The beneficial effects of this invention are: 1. This silencer consists only of core components such as the cavity, air inlet assembly, air outlet pipe, perforated plate and drain outlet. The number of parts is small and the processing and assembly process is simple, which can effectively reduce the production and manufacturing cost.

[0016] 2. The number of air intake components and air outlet pipes can be flexibly adjusted according to the air intake flow requirements of different pressure equipment to adapt to the noise reduction requirements of various equipment specifications; at the same time, the cavity adopts a steel plate welded structure, which can withstand working pressure of 0~1.6MPa, covering most industrial application scenarios from normal pressure to medium pressure.

[0017] 3. A three-stage reactive noise reduction structure is formed by two layers of perforated plates. The acoustic effect of multiple expansion and contraction of airflow can effectively attenuate low and medium frequency noise. After filling the cavity with sound-absorbing cotton, the absorption effect of high frequency noise can be further enhanced.

[0018] 4. A drain outlet is installed at the bottom of the cavity to promptly drain the condensate water accumulated inside the cavity, preventing water accumulation from weakening the sound absorption performance and reducing the corrosion of the cavity and internal components by water accumulation, thus effectively extending the service life of the muffler. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall internal structure of the present invention.

[0020] The markings in the diagram are as follows: 1-Intake assembly; 2-Cavity; 3-Perforated plate; 4-Drain outlet; 5-Outlet pipe; 6-Intake pipe; 7-Intake pipe connector; 8-Perforated pipe; 9-First silencing cavity; 10-Second silencing cavity; 11-Third silencing cavity. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0022] In the description of this invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. It should be noted that the terms "comprising," "including," or any other variations are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0023] like Figure 1 As shown, a simple pressure-bearing air intake silencer includes a cavity 2, an air intake assembly 1, an air outlet pipe 5, two perforated plates 3, and a drain outlet 4.

[0024] Cavity 2 adopts a cylindrical sealing structure, which is welded from Q235 steel plate with a thickness of 5mm. The inner diameter of the cavity is 300mm, the axial length is 600mm, and the rated working pressure is 1.0MPa. Circular sealing end caps are welded to the left and right ends of cavity 2 to form a sealed pressure chamber.

[0025] At least one air intake assembly 1 is provided, which is installed at the center of the sealing end cap on the left side of the cavity 2 via an air intake pipe connector 7. The air intake assembly 1 includes an air intake pipe 6, an air intake pipe connector 7, and a perforated pipe 8; wherein the outer diameter of the air intake pipe 6 is 50mm and the wall thickness is 3mm; the air intake pipe connector 7 adopts a flange connection structure, which facilitates the installation, disassembly, and maintenance of the air intake assembly 1; the perforated pipe 8 is welded and fixed to the inner end of the air intake pipe 6 that extends into the cavity, the perforated pipe 8 is 150mm long, and has through holes with a diameter of 4mm evenly distributed on its wall, with an opening rate of 25%, and the perforated pipe 8 is entirely located inside the first silencing cavity 9.

[0026] At least one vent pipe 5 is provided, which is welded and fixed to the center of the sealing end cap on the right side of the cavity 2. The outer diameter of the vent pipe 5 is 50mm and the wall thickness is 3mm. The vent end is used to connect to the air inlet of an external air storage tank or other pressure equipment.

[0027] Two perforated plates 3 are fixed parallel to each other along the axial direction inside the cavity 2, dividing the internal space of the cavity into a first anechoic chamber 9, a second anechoic chamber 10, and a third anechoic chamber 11 in sequence along the axial direction. Both perforated plates 3 have a thickness of 2mm, and are evenly distributed with through holes of 4mm diameter on their surfaces, resulting in an opening rate of 25%. In this embodiment, the axial length of the first anechoic chamber 9 is 150mm, the axial length of the second anechoic chamber 10 is 225mm, and the axial length of the third anechoic chamber 11 is 150mm, with a volume ratio of 1:1.5:1.

[0028] Drain 4 is located at the lowest point of the lower part of cavity 2. The diameter of drain 4 is 15mm. A manual ball valve is installed on drain 4 as a drain control valve, which can be manually opened periodically to drain the condensate water accumulated inside cavity 2.

[0029] The working principle of this embodiment is as follows: When the pressure equipment is in the air intake condition, the high-speed airflow enters the perforated pipe 8 through the air intake pipe 6. The airflow is injected into the first silencing cavity 9 through the through hole in the wall of the perforated pipe 8. The sudden increase in the cross-sectional area of ​​the airflow leads to a decrease in flow velocity, and the aerodynamic noise is initially attenuated. Subsequently, the airflow passes through the first layer of perforated plate 3 and enters the second silencing cavity 10, and then through the second layer of perforated plate 3 and enters the third silencing cavity 11. After multiple expansion and contraction acoustic effects, the mid-to-low frequency noise is effectively attenuated. Finally, the airflow that has undergone silencing treatment is delivered to the air storage tank or other pressure equipment through the air outlet pipe 5.

[0030] During equipment operation, the condensate generated by the airflow cooling will accumulate at the bottom of cavity 2. The manual ball valve at drain port 4 can be opened periodically to drain the condensate from the cavity.

[0031] The scope of protection of this invention is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this invention shall fall within the scope of protection of this invention.

Claims

1. A simple pressure-bearing intake silencer, characterized in that: It includes a cavity (2), an air inlet assembly (1), an air outlet pipe (5), two layers of perforated plates (3), and a drain outlet (4); there is at least one air inlet assembly (1), which is installed on the left side wall of the cavity (2); there is at least one air outlet pipe (5), which is installed on the right side wall of the cavity (2); the two layers of perforated plates (3) are fixed in parallel inside the cavity (2), dividing the internal space of the cavity (2) into a first silencing cavity (9), a second silencing cavity (10), and a third silencing cavity (11) in sequence; the drain outlet (4) is located at the lower part of the cavity (2).

2. The simplified pressure-bearing intake silencer according to claim 1, characterized in that: The air intake assembly (1) includes an air intake pipe (6), an air intake pipe connector (7), and a perforated pipe (8); the air intake pipe (6) is fixedly connected to the left side wall of the cavity (2) through the air intake pipe connector (7), the perforated pipe (8) is fixed to the inner end of the air intake pipe (6) extending into the cavity (2), and the perforated pipe (8) is located in the first silencing cavity (9).

3. The simplified pressure-bearing intake silencer according to claim 2, characterized in that: The perforated tube (8) and the two layers of perforated plates (3) are uniformly distributed with through holes. The diameter of the through holes is 3mm~5mm. The opening rate of the perforated tube (8) and the perforated plate (3) is 20%~30%.

4. The simplified pressure-bearing intake silencer according to claim 2, characterized in that: The air intake pipe connector (7) is a flange connection connector or a threaded connection connector.

5. The simplified pressure-bearing intake silencer according to claim 1, characterized in that: The cavity (2) is a cylindrical sealed cavity, which is welded from steel plates with a thickness of 3mm to 8mm. The rated working pressure range of the cavity (2) is 0 to 1.6MPa.

6. The simplified pressure-bearing intake silencer according to claim 1, characterized in that: The volume ratio of the first silencing cavity (9), the second silencing cavity (10), and the third silencing cavity (11) is 1:1.5:

1.

7. The simplified pressure-bearing intake muffler according to claim 1, characterized in that: The gap between the inner wall of the cavity (2) and the perforated plate (3) is filled with sound-absorbing cotton, which is glass wool or rock wool, and the thickness of the sound-absorbing cotton is 20mm~50mm.

8. The simplified pressure-bearing intake muffler according to claim 1, characterized in that: A drain control valve is installed at the drain outlet (4), which is a manual ball valve or an automatic drain valve.

9. The simplified pressure-bearing intake silencer according to claim 1, characterized in that: The number of the air intake assembly (1) and the air outlet pipe (5) are matched, and the number of the air intake assembly (1) and the air outlet pipe (5) are both set to 1 to 4.

10. The simplified pressure-bearing intake silencer according to claim 5, characterized in that: The cavity (2) is welded with sealing end caps at both the left and right ends. The air intake assembly (1) is installed on the sealing end cap on the left side, and the air outlet pipe (5) is installed on the sealing end cap on the right side.

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