A muffler used on a vacuum pump

Abstract

The utility model discloses a muffler used on a vacuum pump, which relates to the field of vacuum pump muffler, comprising a first chamber and a second chamber, a regulating component is arranged between the first chamber and the second chamber, an inlet pipe is connected to the side of the first chamber away from the regulating component, an outlet pipe is arranged on the side of the second chamber away from the regulating component, the regulating component comprises a rotatable movable ring, an inner cavity wall is arranged coaxially inside the movable ring, a spiral groove is formed between the inner cavity wall and the inner wall of the movable ring, the side ends of the first chamber and the second chamber are both embedded in the corresponding spiral grooves, and a plurality of groups of circumferentially distributed mufflers are installed on the side wall of the inner cavity wall facing the second chamber. The utility model provides a new muffler structure, which can effectively reduce noise of various frequencies and realize full-frequency noise reduction of exhaust noise.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pump silencing, in particular to a muffler used on a vacuum pump. Background Art

[0002] The function of the vacuum pump exhaust system is to discharge the exhaust gas from the vacuum pump into the atmosphere with the smallest exhaust resistance and noise possible. Among them, the more common is the resistance muffler, which works by diffusing and reflecting the sound waves entering the muffler through the complex pipe design and different expansion ratios inside the muffler, thereby achieving the effect of reducing the exhaust noise of the vacuum pump. The resistance muffler has a more significant effect on the noise in the medium and low frequency bands, but the silencing effect is relatively poor for high-frequency noise. Utility Model Content

[0003] The utility model aims to provide a muffler used on a vacuum pump and a new muffler structure. The muffler can effectively reduce noise of various frequencies and achieve full-frequency noise reduction of exhaust noise.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a muffler used on a vacuum pump, comprising a first chamber and a second chamber, wherein a regulating component is provided between the first chamber and the second chamber;

[0005] The side of the first chamber away from the regulating component is connected to an inlet pipe, and the side of the second chamber away from the regulating component is provided with an outlet pipe;

[0006] The regulating component includes a rotatable movable ring, an inner cavity wall is coaxially arranged inside the movable ring, a spiral groove is formed between the inner cavity wall and the inner wall of the movable ring, the side ends of the first chamber and the second chamber are both embedded in the corresponding spiral grooves, and a plurality of groups of circumferentially distributed silencers are installed on the side wall of the inner cavity wall facing the second chamber.

[0007] Furthermore, each group of the silencer device includes a spring rod installed on the inner cavity wall, a sleeve sleeved on the spring rod, and a resonance tube connected to the sleeve through a connecting block.

[0008] Furthermore, an air intake pipe is provided inside the air intake pipe in the same direction as the extension direction of the resonance pipe, and an interface matched with the air intake pipe opening is installed on the side of the connecting block facing the air intake pipe.

[0009] Furthermore, the silencer is provided with four groups, and the specifications of the resonance tubes of each group of the silencer are different. The length, width and height specifications of the resonance tubes are 215X112X145 (cm), 177X112X145 (cm), 141X90X110 (cm), and 127X90X110 (cm), respectively; corresponding to 70-90dB (A), 60-70dB (A), 50-60dB (A), and 40-50dB (A) of the vacuum pump, respectively. Through the design of resonance tubes of different specifications, noise of different frequencies can be reduced in a targeted manner.

[0010] Furthermore, an air pump and a push rod connected to the air pump are provided on the second chamber, and the push rod is arranged inside the second chamber to push the connecting block.

[0011] Furthermore, the portion of the outlet pipe located inside the second chamber is provided with a plurality of air holes for recovering the airflow in the second chamber and discharging it outside the chamber.

[0012] Furthermore, the movable ring and the side ends of the first chamber and the second chamber embedded in the rotating groove are all provided with a plurality of threaded holes, which can be fixed later by screws matching the threaded holes.

[0013] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0014] 1. The specifications of the resonance tubes of each group of the silencers are different. The design of resonance tubes of different specifications can reduce noise of different frequencies in a targeted manner, so as to solve the problem that the traditional reactive silencer has a more significant noise silencing effect on the mid- and low-frequency bands, but has a relatively poor silencing effect on high-frequency noise.

[0015] 2. The control component adopts a live ring design to flexibly replace the corresponding processing device for the frequency of the vacuum pump, which can improve the use effect and the sound reduction effect. At the same time, a spiral groove is formed between the inner walls, and screws are used to fix it with threaded holes to improve its stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the internal installation of the control component in the utility model;

[0019] Figure 3 It is a schematic diagram of the structural installation of the air intake pipe and the regulating component in the utility model;

[0020] Figure 4 It is a schematic diagram of the structural installation of the rotary tank, the resonance tube, the push rod and the air pump in the utility model.

[0021] In the figure: 1. first chamber; 2. second chamber; 3. regulating assembly; 31. movable ring; 32. inner chamber wall; 33. rotary groove; 34. silencer; 341. spring rod; 342. sleeve; 343. connecting block; 344. resonance tube; 4. inlet pipe; 5. outlet pipe; 6. air inlet pipe; 7. interface; 8. air pump; 9. push rod; 10. air hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 4 , the utility model provides a technical solution: a muffler used on a vacuum pump, comprising a first chamber 1 and a second chamber 2, a regulating component 3 is provided between the first chamber 1 and the second chamber 2;

[0024] The first chamber 1 is connected to an inlet pipe 4 on a side away from the regulating component 3, and the second chamber 2 is provided with an outlet pipe 5 on a side away from the regulating component 3;

[0025] The regulating component 3 includes a rotatable movable ring 31, an inner cavity wall 32 is coaxially arranged inside the movable ring 31, a spiral groove 33 is formed between the inner cavity wall 32 and the inner wall of the movable ring 31, the side ends of the first chamber 1 and the second chamber 2 are both embedded in the corresponding spiral groove 33, and a plurality of groups of circumferentially distributed silencers 34 are installed on the side wall of the inner cavity wall 32 facing the second chamber 2.

[0026] Preferably, each set of silencers 34 includes a spring rod 341 installed on the inner cavity wall 32 , a sleeve 342 sleeved on the spring rod 341 , and a resonance tube 344 connected to the sleeve 342 via a connecting block 343 .

[0027] Preferably, an air intake pipe 6 is provided inside the air intake pipe 4 in the same direction as the resonance pipe 344 , and an interface 7 adapted to the pipe opening of the air intake pipe 6 is installed on the side of the connecting block 343 facing the air intake pipe 6 .

[0028] Preferably, there are four groups of silencers 34, and the specifications of the resonance tubes 344 of each group of silencers 34 are different. The length, width and height specifications of the resonance tubes 344 are 215X112X145 (cm), 177X112X145 (cm), 141X90X110 (cm), and 127X90X110 (cm), respectively; corresponding to 70-90dB (A), 60-70dB (A), 50-60dB (A), and 40-50dB (A) of the vacuum pump, respectively. The design of resonance tubes 344 of different specifications can reduce noise of different frequencies in a targeted manner.

[0029] Preferably, an air pump 8 and a push rod 9 connected to the air pump 8 are provided on the second chamber 2 , and the push rod 9 is arranged inside the second chamber 2 for pushing the connecting block 343 .

[0030] Preferably, the portion of the outlet pipe 5 located inside the second chamber 2 is provided with a plurality of air holes 10 for recovering the airflow in the second chamber 2 and discharging it outside the chamber.

[0031] Preferably, the movable ring 31 and the side ends of the first chamber 1 and the second chamber 2 embedded in the rotating groove 33 are provided with a plurality of threaded holes, which can be fixed later by screws matching the threaded holes.

[0032] Working principle: The power required by the vacuum pump in different working conditions is different, and different powers will produce noises of different frequencies. According to the needs of the use scenario, this device allows the movable ring 31 to rotate freely by removing the screws installed on the movable ring 31. Under high power conditions, the resonance tube 344 with a length, width and height of 215X112X145 (cm) is rotated to the coaxial direction of the intake pipe 6, and the air pump 8 drives the push rod 9 to push the connecting block 343 so that the interface 7 at this position is connected to the intake pipe 6, thereby correspondingly processing the noise of the corresponding frequency. Similarly, vacuum pumps under different powers correspond to resonance tubes 344 of different specifications, realizing full-frequency noise reduction of exhaust noise. In the process of replacing the corresponding resonance tube 344, due to the elastic effect of the spring rod 341 itself, the push rod 9 will automatically rebound to the initial position when the action with the connecting block 343 is released, which is convenient for flexible replacement of the device.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A muffler for use on a vacuum pump, comprising a first chamber (1) and a second chamber (2), characterized in that: A regulating component (3) is provided between the first chamber (1) and the second chamber (2); The side of the first chamber (1) away from the regulating component (3) is connected to an inlet pipe (4), and the side of the second chamber (2) away from the regulating component (3) is provided with an outlet pipe (5); The regulating component (3) comprises a rotatable movable ring (31), wherein an inner cavity wall (32) is coaxially arranged inside the movable ring (31), a rotary groove (33) is formed between the inner cavity wall (32) and the inner wall of the movable ring (31), the side ends of the first chamber (1) and the second chamber (2) are both embedded in the corresponding rotary groove (33), and a plurality of groups of circumferentially distributed silencers (34) are installed on the side wall of the inner cavity wall (32) facing the second chamber (2).

2. A muffler for use on a vacuum pump according to claim 1, characterized in that: Each group of the silencer devices (34) comprises a spring rod (341) mounted on the inner cavity wall (32), a sleeve (342) sleeved on the spring rod (341), and a resonance tube (344) connected to the sleeve (342) via a connecting block (343).

3. A muffler for use on a vacuum pump according to claim 2, characterized in that: An air intake pipe (6) extending in the same direction as the resonance pipe (344) is provided inside the air intake pipe (4), and an interface (7) adapted to the pipe opening of the air intake pipe (6) is installed on the side of the connection block (343) facing the air intake pipe (6).

4. A muffler for use on a vacuum pump according to claim 3, characterized in that: The silencer (34) is provided with four groups in total, and the specifications of the resonance pipe (344) of each group of the silencer (34) are different. The length, width and height specifications of the resonance pipe (344) are 215X112X145cm, 177X112X145cm, 141X90X110cm, and 127X90X110cm, respectively.

5. The muffler used on a vacuum pump according to claim 1, characterized in that: The second chamber (2) is provided with an air pump (8) and a push rod (9) connected to the air pump (8); the push rod (9) is arranged inside the second chamber (2).

6. The muffler used on a vacuum pump according to claim 1, characterized in that: The portion of the outlet pipe (5) located inside the second chamber (2) is provided with a plurality of air holes (10).

7. The muffler used on a vacuum pump according to claim 1, characterized in that: The movable ring (31) and the side ends of the first chamber (1) and the second chamber (2) embedded in the rotating groove (33) are all provided with a plurality of threaded holes.

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