Silencing device of vacuum pump

Abstract

The utility model relates to a vacuum pump silencer which comprises a silencing cylinder and an atomizing device, the silencing cylinder is provided with a first inner cavity, the atomizing device comprises an atomizing nozzle, the atomizing nozzle is connected with the first inner cavity, the silencing cylinder is respectively connected with an air inlet pipeline and an air outlet pipeline, the air inlet pipeline is connected with the air outlet end of a vacuum pump, and the air outlet pipeline is connected with the air outlet end of the vacuum pump. The air inlet pipeline is connected with a second silencing part, and the silencing barrel is connected with a third silencing part and a fourth silencing part. The noise reduction device has the advantages of being simple in structure and high in noise reduction capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a silencing device for a vacuum pump. Background Art

[0002] In the industrial production processes of enterprises in the chemical, pharmaceutical, material and other industries or in the research activities of scientific research institutions, it is often necessary to use a vacuum pump to generate various vacuum environments to meet the needs of industrial production or scientific research. During the operation of various vacuum pumps, continuous high-frequency and low-frequency noises will be generated at the exhaust end of the vacuum pump. Being in such a noise environment for a long time will not only make the staff distracted and affect work efficiency, but also cause phenomena such as tinnitus, headache, nausea, and vomiting in the staff, having an adverse impact on the physical health of the staff.

[0003] Currently, the common measures for reducing the noise at the exhaust end of a vacuum pump mainly include adding a muffler at the exhaust port of the vacuum pump and overall isolation of the vacuum pump. When reducing the noise at the exhaust end of the vacuum pump by these methods, it will have an adverse impact on aspects such as the exhaust efficiency and heat dissipation capacity of the vacuum pump, making the vacuum pump unable to be in the best working state, thereby affecting the working efficiency of the vacuum pump. At the same time, the noise reduction effect of these methods is limited and cannot meet the requirements for reducing the noise at the exhaust end of the vacuum pump. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a silencing device for a vacuum pump with a simple structure and strong noise reduction ability.

[0005] The utility model is realized by the following technical solutions. A silencing device for a vacuum pump is provided, which includes a silencing cylinder and an atomization device. The silencing cylinder is provided with a first inner cavity. The atomization device includes an atomizing nozzle, and the atomizing nozzle is connected to the silencing cylinder. The outlet of the atomizing nozzle is located inside the first inner cavity. The silencing cylinder is respectively connected with an intake pipe and an exhaust pipe. The intake pipe is connected to the exhaust end of the vacuum pump, and the intake pipe is connected with a second silencing component. The silencing cylinder is respectively connected with a third silencing component and a fourth silencing component.

[0006] Compared with the prior art, the beneficial effect of the utility model lies in that: through the atomizing nozzle, the space of the first inner cavity can be filled with atomized water droplets. When the sound waves generating noise propagate to these water droplets, the water molecules will absorb the energy carried by the noise sound waves, thereby achieving the effect of noise reduction. At the same time, due to the strong dispersibility and large surface area of the atomized water droplets, the energy in the noise sound waves can be fully absorbed;

[0007] Through the second sound-absorbing component, the noise generated at the exhaust end of the vacuum pump can be preliminarily reduced in noise. Through the third sound-absorbing component and the fourth sound-absorbing component, the path and direction of the noise sound wave can be changed multiple times, so that the noise sound wave gradually attenuates during multiple reflections and interferences, and further reduces the noise.

[0008] Preferably, the first inner cavity is covered with a first sound-absorbing component.

[0009] The beneficial effect of adopting the above preferred technical solution is that: through the first sound-absorbing component, when the noise sound wave at the exhaust end of the vacuum pump contacts the first sound-absorbing component, the energy in the noise sound wave can be reduced, thereby achieving the purpose of noise reduction. In addition, through the first sound-absorbing component, it is possible to prevent the noise sound wave at the exhaust end of the vacuum pump from resonating with the side wall of the first inner cavity, resulting in the generation of additional noise.

[0010] Preferably, at least two third sound-absorbing components are provided from bottom to top, and two adjacent third sound-absorbing components are arranged staggered left and right.

[0011] The beneficial effect of adopting the above preferred technical solution is that: by providing at least two sound-absorbing components, the noise sound wave can be fully blocked, improving the noise reduction effect. Moreover, at least two third sound-absorbing components arranged staggered left and right can ensure that the noise sound wave must pass through the attenuation of the third sound-absorbing component before reaching the exhaust pipe, thus ensuring the noise reduction effect.

[0012] Preferably, the third sound-absorbing component is covered with a fifth sound-absorbing component.

[0013] The beneficial effect of adopting the above preferred technical solution is that: through the fifth sound-absorbing component covering the surface of the third sound-absorbing component, the energy of the noise sound wave can be absorbed, thereby reducing the energy of the reflected noise sound wave, and thus further increasing the noise reduction effect of the third sound-absorbing component.

[0014] Preferably, the fourth sound-absorbing component is provided with a number of openings, at least two fourth sound-absorbing components are provided from bottom to top, and the openings of two adjacent fourth sound-absorbing components are distributed staggered.

[0015] The beneficial effect of adopting the above preferred technical solution is that: since at least two fourth sound-absorbing components are provided from bottom to top and the openings of two adjacent fourth sound-absorbing components are distributed staggered, when the noise sound wave passes through the openings of the lower fourth sound-absorbing component, it cannot directly pass through the openings of the upper fourth sound-absorbing component. Therefore, the noise sound wave will undergo multiple reflections and interferences between two adjacent fourth sound-absorbing components, thereby reducing the energy of the noise sound wave and achieving the effect of further noise reduction.

[0016] Preferably, the first inner cavity is connected with a first detection component, and the atomizing device further includes a first power device.

[0017] The beneficial effects of adopting the above preferred technical solutions are as follows: through the first detection component, the noise level of the airflow entering the exhaust pipe can be detected in real time. By adjusting the first power device, the water mist size of the atomizing nozzle can be controlled. Since when the output power of the vacuum pump changes, the noise level at the exhaust end of the vacuum pump also changes, the first detection component can thus control the first power device to increase or decrease the water mist size of the atomizing nozzle in real time, thereby ensuring the stability of the noise reduction effect and avoiding the waste of water resources.

[0018] Preferably, the first inner cavity is connected with a second detection component, and the bottom of the muffler is connected with a first switch component.

[0019] The beneficial effects of adopting the above preferred technical solutions are as follows: through the second detection component, the water level at the bottom of the first inner cavity can be detected in real time. When the set water level is reached, the first switch component can be automatically opened to drain the accumulated water in the first inner cavity, preventing the accumulated water from overflowing the intake pipe. And when the water level drops to the set position, the first switch component automatically closes to prevent the first inner cavity from directly communicating with the outside atmosphere.

[0020] Preferably, the exhaust pipe is connected with a steam-water separator, the atomizing device further includes a water tank, and the drain port of the steam-water separator is communicated with the water tank.

[0021] The beneficial effects of adopting the above preferred technical solutions are as follows: through the steam-water separator, the water and gas in the airflow after noise reduction can be separated, and the separated water liquid can re-enter the atomizing device for circulation. While saving water resources, it can prevent the water from being discharged into the external environment along with the gas and affecting the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the present utility model.

[0023] As shown in the figure:

[0024] 1, muffler; 2, first inner cavity; 3, intake pipe; 4, exhaust pipe; 5, first muffling component; 6, second muffling component; 7, third muffling component; 8, fourth muffling component; 9, fifth muffling component; 10, steam-water separator; 11, first detection component; 12, second detection component; 13, first switch component; 14, atomizing nozzle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Embodiment 1:

[0027] As Figure 1A silencing device for a vacuum pump as shown includes a silencing cylinder 1 and an atomizing device. Inside the silencing cylinder 1, there is a sealed first inner cavity 2, and the inner wall of the first inner cavity 2 is covered with a first silencing component 5. In this embodiment, preferably, the first silencing component 5 is a waterproof polyester fiber sound-absorbing cotton. The lower part of the silencing cylinder 1 is connected to an intake pipe 3 communicating with the first inner cavity 2. One end of the intake pipe 3 is connected to the exhaust end of the vacuum pump, and the other end is connected to a cover plate. The cover plate is connected with a number of second silencing components 6. The cover plate and the second silencing components 6 are both located in the first inner cavity 2. The first inner cavity 2 communicates with the intake pipe 3 through the second silencing components 6. In this embodiment, preferably, the second silencing component 6 is a brass silencer. The top of the silencing cylinder 1 is connected to an exhaust pipe 4 communicating with the first inner cavity 2. One end of the exhaust pipe 4 away from the first inner cavity 2 is connected to a steam-water separator 10. Between the second silencing component 6 in the first inner cavity 2 and the exhaust pipe 4, a third silencing component 7 and a fourth silencing component 8 are arranged in sequence from bottom to top. In the first inner cavity 2, a number of third silencing components 7 are arranged in a staggered manner from left to right and from bottom to top. One end of the third silencing component 7 is connected to the side wall of the first inner cavity 2, and the other end is suspended. The horizontal projections of two adjacent third silencing components 7 above and below overlap. There is a space for air flow between two adjacent third silencing components 7 above and below. The height of the suspended end of the third silencing component 7 is lower than the end connected to the first inner cavity 2. The upper surface and the lower surface of the third silencing component 7 are both covered with a fifth silencing component 9. In this embodiment, preferably, the fourth silencing component 8 is a waterproof corrugated sound-absorbing cotton. The fourth silencing component 8 is located above the uppermost third silencing component 7. The fourth silencing component 8 is connected to the first inner cavity 2 and is completely fitted with the inner wall around the first inner cavity 2. The fourth silencing component 8 is provided with a number of openings. In the first inner cavity 2, a number of fourth silencing components 8 are arranged in sequence from bottom to top. The openings on two adjacent fourth silencing components 8 above and below are staggered. The atomizing device includes a water tank, a first power device, and an atomizing nozzle 14. The first power device is respectively communicated with the water tank and the atomizing nozzle 14. The atomizing nozzle 14 is located inside the first inner cavity 2 and is connected to the side wall of the first inner cavity 2. Atomizing nozzles 14 are arranged below the lowermost third silencing component 7, above the uppermost fourth silencing component 8, between two adjacent third silencing components 7, and between two adjacent fourth silencing components 8. Through the first power device, the water in the water tank can be transported to the atomizing nozzle 14, and the first inner cavity 2 is filled with water mist through the atomizing nozzle 14. The drain port of the steam-water separator 10 is connected to the water tank. The first inner cavity 2 is connected with a first detection component 11 and a second detection component 12. The first detection component 11 is located above the uppermost fourth silencing component 8 and close to the exhaust pipe 4. The second detection component 12 is located below the intake pipe 3. In this embodiment, preferably, the first detection component 11 is a stainless steel noise sensor and the second detection component 12 is a submersible level sensor.A first switch component 13 is connected to the bottom of the sound silencer 1, and the first switch component 13 communicates with the bottom of the first inner cavity 2. In this embodiment, preferably, the first switch component 13 is an electric control gate valve, and the first power device, the first detection component 11, the second detection component 12, and the first switch component 13 are all electrically connected to the electric control system.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A silencing device for a vacuum pump, characterized in that: It includes a silencing cylinder (1) and an atomization device. The silencing cylinder (1) is provided with a first inner cavity (2). The atomization device includes an atomizing nozzle (14). The atomizing nozzle (14) is connected to the silencing cylinder (1). The outlet of the atomizing nozzle (14) is located inside the first inner cavity (2). The silencing cylinder (1) is respectively connected to an air inlet pipe (3) and an exhaust pipe (4). The air inlet pipe (3) is connected to the exhaust end of a vacuum pump. The air inlet pipe (3) is connected with a second silencing component (6). The silencing cylinder (1) is respectively connected with a third silencing component (7) and a fourth silencing component (8).

2. The silencing device for a vacuum pump according to claim 1, characterized in that: The first inner cavity (2) is covered with a first silencing component (5).

3. The noise reduction device for a vacuum pump according to claim 1, characterized in that: There are at least two third silencing components (7) arranged from bottom to top, and two adjacent third silencing components (7) are arranged staggeredly left and right.

4. A silencing device for a vacuum pump according to claim 1, characterized in that: The third silencing component (7) is covered with a fifth silencing component (9).

5. The silencing device for a vacuum pump according to claim 1, wherein: The fourth silencing component (8) is provided with a number of openings. There are at least two fourth silencing components (8) arranged from bottom to top, and the openings of two adjacent fourth silencing components (8) are distributed staggeredly.

6. The noise elimination device for a vacuum pump according to claim 1, characterized in that: The first inner cavity (2) is connected with a first detection component (11), and the atomization device further includes a first power device.

7. A silencing device for a vacuum pump according to claim 1, characterized in that: The first inner cavity (2) is connected with a second detection component (12), and the bottom of the silencing cylinder (1) is connected with a first switch component (13).

8. A silencing device for a vacuum pump according to claim 1, characterized in that: The exhaust pipe (4) is connected with a steam-water separator (10). The atomization device further includes a water tank, and the drain port of the steam-water separator (10) is communicated with the water tank.

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