A silencer for a vacuum pump

Abstract

This utility model discloses a silencing device for a vacuum pump, including a cylindrical body. Two partitions are arranged inside the cylindrical body from top to bottom, dividing the cylindrical body into a first chamber, a second chamber, and a third chamber from top to bottom. An air inlet pipe is connected to the first chamber, and the first and third chambers are connected by a first connecting pipe. The second and third chambers are connected by a second connecting pipe, and an exhaust pipe is connected to the second chamber. This relates to the field of silencing structure technology. The cylindrical body is divided into a first chamber, a second chamber, and a third chamber from top to bottom by partitions. An air inlet pipe is connected to the first chamber, and the first and third chambers are connected by a first connecting pipe. The second and third chambers are connected by a second connecting pipe, and an exhaust pipe is connected to the second chamber. Gas diffuses and flows along the first, third, and second chambers within the silencer. During the reciprocating flow within the path, the energy of the gas is consumed, resulting in better performance.

Description

Technical Field

[0001] This utility model belongs to the field of noise reduction structure technology, specifically a noise reduction device for a vacuum pump. Background Technology

[0002] Connecting a silencer to the exhaust port of a vacuum pump effectively reduces the noise generated by the pump's exhaust. Currently, most silencers used in vacuum pumps employ a ball valve structure, with the ball typically made of rubber. While rubber valve balls are inert to almost all chemicals and possess a low coefficient of friction, stable performance, resistance to aging, a wide operating temperature range, and excellent sealing performance, their physical properties, including a high coefficient of expansion, sensitivity to cold flow, and poor thermal conductivity, necessitate that the valve seat seal design be tailored to these characteristics. Consequently, the reliability of such vacuum pump silencers is relatively low, and their noise reduction effect is easily compromised.

[0003] The patent application "A Novel Silencer for a Multi-Stage Dry Vacuum Pump" (application number "202011431400.X") includes a cylindrical component with an internal partition, an inlet pipe, an exhaust pipe, and a connecting pipe. The partition divides the inner cavity of the cylindrical component into two spaces. This invention, through the coordinated arrangement of the cylindrical component with the internal partition, the inlet pipe, the exhaust pipe, and the connecting pipe, allows the gas discharged from the vacuum pump to flow along the complex channels within the silencer. During this reciprocating flow within the path, the gas's energy is consumed, thereby achieving noise reduction. Furthermore, the length of the gas flow path within the silencer can be designed according to the type of the backing pump to better match the backing pump and achieve specified noise levels. It boasts high reliability and a simple structure. The protective cover effectively protects the silencer from external damage and also meets the requirement that on-site operators do not directly contact the main cylindrical body of the cylindrical component and can safely disassemble it.

[0004] However, the function of such silencers is mainly achieved by consuming the energy of the gas during the reciprocating flow of the gas in the pipeline, thereby achieving the purpose of noise reduction. However, the length and inner diameter of the pipeline limit the efficiency of gas energy consumption, resulting in poor noise reduction effect. Utility Model Content

[0005] The purpose of this invention is to provide a silencing device for a vacuum pump to solve the problems mentioned in the background art.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A silencing device for a vacuum pump includes a cylindrical body. Two partitions are arranged inside the cylindrical body from top to bottom, dividing the cylindrical body into a first chamber, a second chamber, and a third chamber from top to bottom. An air inlet pipe is connected to the first chamber, and the first chamber and the third chamber are connected by a first connecting pipe. The second chamber and the third chamber are connected by a second connecting pipe, and an exhaust pipe is connected to the second chamber.

[0008] Preferably, the exhaust pipe is located at the center of the top of the cylinder, with its lower end passing through the third cavity and connected to the lower end of the second cavity.

[0009] Preferably, the air intake pipe is located on the side of the first cavity, and the air intake pipe is connected to the lower end of the first cavity.

[0010] Preferably, the two ends of the second connecting pipe are connected to the upper end of the second cavity and the lower end of the third cavity, respectively.

[0011] Preferably, the two ends of the first connecting pipe are connected to the upper end of the third cavity and the upper end of the first cavity, respectively.

[0012] Preferably, the lower side of the first cavity is also provided with a drain hole.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0014] In this invention, the cylinder is divided into a first chamber, a second chamber, and a third chamber from top to bottom by a partition. The first chamber is connected to an air inlet pipe, and the first and third chambers are connected by a first connecting pipe. The second and third chambers are connected by a second connecting pipe, and the second chamber is connected to an exhaust pipe. The gas diffuses and flows along the first, third, and second chambers within the muffler. During the reciprocating flow within the path, the energy of the gas is consumed, greatly improving the energy consumption efficiency during the gas flow process, enhancing the muffler effect, and resulting in better performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] In the diagram: 1. Cylinder; 11. First cavity; 12. Second cavity; 13. Third cavity; 2. Baffle; 31. Inlet pipe; 32. First connecting pipe; 33. Second connecting pipe; 34. Exhaust pipe; 4. Drain hole. Detailed Implementation

[0017] The specific embodiments of this utility model are described in detail below.

[0018] The "range" disclosed in this utility model is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 10–50 is listed for a specific parameter, it is also expected that ranges of 10–40 and 20–50 are also included. Furthermore, if the minimum range values ​​are listed as 1 and 2, and the maximum range values ​​are listed as 3, 4, and 5, then the following ranges are all expected: 1–3, 1–4, 1–5, 2–3, 2–4, and 2–5. In this application, unless otherwise stated, the numerical range "a–b" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0–5" means that all real numbers between "0–5" have been listed herein; "0–5" is merely a shortened representation of these numerical combinations.

[0019] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0020] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0021] Unless otherwise specified, all steps in this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order. For example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0022] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0023] Unless otherwise specified, the reaction will proceed under normal temperature and pressure conditions.

[0024] Unless otherwise specified, all parts or percentages are by weight or by weight percentage.

[0025] In this invention, all the substances used are known substances that can be purchased or synthesized by known methods.

[0026] In this invention, all the devices or equipment used are conventional devices or equipment known in the art and are readily available.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0028] Example:

[0029] A silencer for a vacuum pump, such as Figure 1 As shown, the device includes a cylindrical body 1. Inside the cylindrical body 1, there are two partitions 2 arranged from top to bottom. The cylindrical body 1 is divided into a first cavity 11, a second cavity 12, and a third cavity 13 from top to bottom by the partitions 2. An air inlet pipe 31 is connected to the first cavity 11. The first cavity 11 and the third cavity 13 are connected by a first connecting pipe 32. The second cavity 12 and the third cavity 13 are connected by a second connecting pipe 33. An exhaust pipe 34 is connected to the second cavity 12.

[0030] In one possible implementation, the exhaust pipe 34 is located at the center of the top of the cylinder 1, with its lower end passing through the third cavity 13 and connected to the lower end of the second cavity 12.

[0031] In one possible implementation, the air intake pipe 31 is located on the side of the first cavity 11 and is connected to the lower end of the first cavity 11.

[0032] In one possible implementation, the two ends of the second connecting pipe 33 are respectively connected to the upper end of the second cavity 12 and the lower end of the third cavity 13.

[0033] In one possible implementation, the two ends of the first connecting pipe 32 are respectively connected to the upper end of the third cavity 13 and the upper end of the first cavity 11.

[0034] In one possible implementation, a drain hole 4 is also provided on the lower side of the first cavity 11.

[0035] Working principle, refer to Figure 1During use, the gas is discharged from the vacuum pump and the tailpipe, enters from the inlet pipe 31 to the lower end of the first chamber 11 and spreads upward, then flows from the upper end of the first chamber 11 through the first connecting pipe 31 to the upper end of the third chamber 13 and spreads downward, then flows from the lower end of the third chamber 13 through the second connecting pipe 32 to the upper end of the second chamber 12 and spreads downward, and then is discharged from the lower end of the second chamber 12 through the exhaust pipe 35. In the whole process, the high-energy gas enters the silencer. Since the outlet and inlet of each chamber are at opposite ends of the chamber, the gas diffuses and flows along the first chamber 11, the third chamber 13, and the second chamber 12. The energy of the gas is consumed in the reciprocating flow within the path, thereby enabling the silencer to achieve the purpose of noise reduction. This greatly improves the energy consumption efficiency in the gas flow process, enhances the silencing effect, and makes the use effect better. At the same time, the length of the gas flow path in the silencer can be designed according to the type of the pre-pump to better match the pre-pump and achieve the specified noise index.

[0036] 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 silencer for a vacuum pump, characterized in that: The device includes a cylindrical body (1), which has two partitions (2) arranged from top to bottom inside the cylindrical body (1). The cylindrical body (1) is divided into a first cavity (11), a second cavity (12) and a third cavity (13) from top to bottom by the partitions (2). An air inlet pipe (31) is connected to the first cavity (11). The first cavity (11) and the third cavity (13) are connected by a first connecting pipe (32). The second cavity (12) and the third cavity (13) are connected by a second connecting pipe (33). An exhaust pipe (34) is connected to the second cavity (12).

2. The silencing device for a vacuum pump as described in claim 1, characterized in that: The exhaust pipe (34) is located at the center of the top of the cylinder (1), and its lower end passes through the third cavity (13), and its lower end is connected to the lower end of the second cavity (12).

3. The silencing device for a vacuum pump as described in claim 2, characterized in that: The air intake pipe (31) is located on the side of the first cavity (11), and the air intake pipe (31) is connected to the lower end of the first cavity (11).

4. The silencing device for a vacuum pump as described in claim 1, characterized in that: The two ends of the second connecting pipe (33) are respectively connected to the upper end of the second cavity (12) and the lower end of the third cavity (13).

5. A silencing device for a vacuum pump as described in claim 1, characterized in that: The two ends of the first connecting pipe (32) are respectively connected to the upper end of the third cavity (13) and the upper end of the first cavity (11).

6. A silencing device for a vacuum pump as described in claim 1, characterized in that: The lower side of the first cavity (11) is also provided with a drain hole (4).

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