Exhaust and noise elimination exhaust mechanism for pneumatic pump

Abstract

The utility model discloses an exhaust noise elimination exhaust mechanism for a pneumatic pump, which comprises a pump body, an air inlet, an exhaust port and a silencer, a buffer mechanism and a noise elimination mechanism are arranged in the silencer, the air inlet is arranged in the middle of the pump body obliquely upwards, the exhaust port is arranged in the middle of the pump body obliquely downwards, and the exhaust port is connected with the silencer through a threaded sleeve. A buffering mechanism composed of a rubber ring, an arc-shaped plate, a spring and a guide rod is arranged on the outer side of the threaded sleeve, gas impact kinetic energy can be absorbed, vibration at the connecting position is reduced, the silencing mechanism comprises a silencing bin, a vacuum box, a reactive silencing mechanism and silencing cotton, the vacuum box blocks high-frequency noise, micro-perforated plates staggered in the reactive silencing mechanism achieve broadband noise reduction, and the silencing effect is good. The silencing cotton adsorbs residual noise, the cover plate is fixed to the front end of the silencer through bolts, maintenance is facilitated, the exhaust holes in the outer side ensure that gas is exhausted in order, and through the multi-stage buffering and silencing design, the exhaust noise of the pneumatic pump is effectively lowered, the structural stability is enhanced, and vibration loss is reduced.

Description

An exhaust silencer mechanism for pneumatic pumps Technical Field

[0001] This utility model relates to the field of exhaust noise reduction technology, and in particular to an exhaust noise reduction mechanism for a pneumatic pump. Background Technology

[0002] In the industrial production field, pneumatic pumps are widely used in fluid transportation and other scenarios due to their advantages such as simple structure and strong adaptability. However, during operation, the compressed gas discharged through the exhaust port of the pneumatic pump will generate strong noise, which will not only seriously interfere with the working environment, but also damage the hearing of operators if exposed for a long time. At the same time, it does not meet the requirements of modern industry for low noise and environmentally friendly equipment.

[0003] Traditional pneumatic pump exhaust silencers often employ a single silencer structure, relying solely on sound-absorbing cotton or reactive silencers. This makes it difficult to effectively suppress broadband noise, resulting in limited silencing effects. Furthermore, the direct impact of high-pressure gas on the silencer structure intensifies vibrations at the connection between the exhaust port and the silencer, leading to loosening and wear of components, which affects the stability and lifespan of the equipment. Additionally, existing silencers are typically fixed structures, making it difficult to flexibly adjust them according to the exhaust characteristics of different pneumatic pumps. Moreover, maintenance and disassembly are inconvenient, increasing operating costs and maintenance difficulty. Therefore, a pneumatic pump exhaust silencer mechanism that can efficiently reduce noise, enhance structural stability, and is easy to maintain is needed. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] Therefore, the purpose of this utility model is to provide an exhaust silencing mechanism for pneumatic pumps, which can solve the problems of high exhaust noise and optimized airflow transmission in existing pneumatic pumps.

[0006] To solve the above technical problems, this utility model provides an exhaust silencer mechanism for a pneumatic pump, which adopts the following technical solution: it includes a pump body, an exhaust port is provided obliquely downward in the middle of the pump body, a silencer is provided at the front end of the exhaust port, a buffer mechanism is provided near the exhaust port of the silencer, and a silencing mechanism is provided away from the exhaust port of the silencer.

[0007] The buffer mechanism includes a rubber ring, a first arc-shaped plate, a spring, a guide rod, a second arc-shaped plate, and a threaded sleeve;

[0008] The silencing mechanism includes a silencing chamber, a resistant silencing mechanism, and silencing cotton.

[0009] Optionally, an air inlet is provided at an angle upward in the middle of the pump body.

[0010] The above technical solution enables compressed gas to flow in an orderly manner within the pump body, avoiding turbulent noise caused by airflow collisions, while optimizing the working efficiency of the pneumatic pump.

[0011] Optionally, a cover plate is fixedly connected to the front end of the muffler by bolts, and an exhaust port is provided on the outer side of the muffler.

[0012] The above technical solution allows for easy disassembly and maintenance of the bolted cover plate, enabling inspection and replacement of the internal buffer and silencing mechanisms. The exhaust port serves as the discharge channel for the treated gas, and its location and layout affect the silencing effect and airflow stability.

[0013] Optionally, the outer side of the rubber ring is fixedly connected to the inner wall of the muffler, and the inner wall of the rubber ring is fixedly connected to the first arc-shaped plate.

[0014] The above technical solution ensures that the buffer mechanism is stably installed at the connection between the exhaust port and the muffler, providing structural protection for the rubber ring to play a flexible shock absorption role during the buffering process.

[0015] Optionally, the spring is located between the first arc-shaped plate and the second arc-shaped plate, the rear end of the second arc-shaped plate is fixedly connected to the guide rod, and the front end of the guide rod passes through the first arc-shaped plate and extends into the interior of the rubber ring.

[0016] The above technical solution achieves buffering by compressing the spring under gas impact, and the guide rod ensures the stability of the relative movement of the first and second arc-shaped plates, making the buffering process smooth, effectively absorbing the kinetic energy of gas impact, and reducing vibration.

[0017] Optionally, the inner wall of the silencer is fixedly connected to the silencing chamber, the inner wall of the silencing chamber is fixedly connected to the vacuum chamber, the number of vacuum chambers is multiple and they are equidistantly distributed inside the silencing chamber, the resistive silencing mechanism is located in the gap formed between adjacent vacuum chambers, and the two sides of the resistive silencing mechanism are respectively attached to the corresponding vacuum chamber.

[0018] The above technical solution utilizes vacuum to block high-frequency noise, and the reactive noise reduction mechanism is located within its gaps, together forming a multi-stage noise reduction structure that enhances the ability to eliminate noise of different frequencies.

[0019] Optionally, the interior of the resistant silencing mechanism includes a first micro-perforated plate, a second micro-perforated plate, and a third micro-perforated plate, wherein the micropores on the first micro-perforated plate, the second micro-perforated plate, and the third micro-perforated plate are staggered.

[0020] The above technical solution enables sound waves of different frequencies to resonate in the micropores, thereby filtering wideband noise and improving the noise reduction effect of the silencing mechanism.

[0021] Optionally, a threaded sleeve is provided at the front end of the second arc-shaped plate at the center of the rubber ring. The lower end of the threaded sleeve is slidably connected to the upper end face of the silencing chamber. The inner wall of the threaded sleeve is threadedly connected to the exhaust port. The front end of the exhaust port passes through the threaded sleeve and enters the interior of the silencing chamber.

[0022] Through the above technical solution, the threaded sleeve not only achieves a stable connection between the exhaust port and the muffler, but also guides the airflow smoothly into the muffler chamber. At the same time, in conjunction with the buffer mechanism, the buffering force is evenly distributed to the connection part, enhancing the stability of the overall structure.

[0023] In summary, this utility model has at least one of the following beneficial effects:

[0024] 1. The buffer mechanism is installed outside the threaded sleeve of the exhaust port and the muffler. Through the synergistic action of the spring and the rubber ring, the kinetic energy generated by the gas impact is converted into elastic potential energy and deformation energy, which effectively reduces the vibration intensity at the exhaust port connection and avoids additional noise caused by vibration. Combined with the multi-stage sound absorption design of the vacuum box, the staggered micro-perforated plate and the sound-absorbing cotton in the sound absorption mechanism, it reduces exhaust noise in all aspects from high frequency blocking, wide frequency resonance to residual noise absorption, and meets the stringent requirements of industrial environment for low noise equipment.

[0025] 2. The threaded sleeve connects the exhaust port and the silencer, providing a stable installation base for the buffer mechanism. At the same time, under the protection of the buffer mechanism, the impact and wear of high-pressure gas on the connection is reduced, preventing loosening or component damage caused by long-term vibration, extending the service life of the equipment, and ensuring the reliability and stability of the pneumatic pump operation. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 is a schematic diagram of the internal structure of the silencer of this utility model;

[0029] Figure 3 is a schematic diagram of the muffler installation structure of this utility model;

[0030] Figure 4 is a schematic diagram of the noise reduction mechanism and buffer mechanism of this utility model;

[0031] Figure 5 is an enlarged view of point A in Figure 4.

[0032] Explanation of reference numerals in the attached drawings: 1. Pump body; 2. Air inlet; 3. Exhaust outlet; 4. Silencer; 5. Exhaust hole; 6. Buffer mechanism; 7. Silencing mechanism; 8. Cover plate; 9. Bolt; 10. Silencing chamber; 11. Rubber ring; 12. First arc-shaped plate; 13. Spring; 14. Guide rod; 15. Second arc-shaped plate; 16. Threaded sleeve; 17. Vacuum chamber; 18. Resistant silencing mechanism; 19. Silencing cotton; 20. First micro-perforated plate; 21. Second micro-perforated plate; 22. Third micro-perforated plate. Detailed Implementation

[0033] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0034] Referring to Figures 1-5, an exhaust silencing mechanism for a pneumatic pump according to an embodiment of the present invention includes a pump body 1, an exhaust port 3 obliquely downward in the middle of the pump body 1, a silencer 4 at the front end of the exhaust port 3, a buffer mechanism 6 near the exhaust port 3 of the silencer 4, a silencing mechanism 7 away from the exhaust port 3 of the silencer 4, an air inlet 2 obliquely upward in the middle of the pump body 1, a cover plate 8 fixedly connected to the front end face of the silencer 4 by bolts 9, and an exhaust hole 5 on the outer side of the silencer 4.

[0035] The buffer mechanism 6 includes a rubber ring 11, a first arc plate 12, a spring 13, a guide rod 14, a second arc plate 15, and a threaded sleeve 16. The outer side of the rubber ring 11 is fixedly connected to the inner wall of the muffler 4, and the inner wall of the rubber ring 11 is fixedly connected to the first arc plate 12. The spring 13 is located between the first arc plate 12 and the second arc plate 15. The rear end of the second arc plate 15 is fixedly connected to the guide rod 14. The front end of the guide rod 14 passes through the first arc plate 12 and extends into the interior of the rubber ring 11. The inner wall of the muffler 4 is fixedly connected to the silencing chamber 10. The inner wall of the silencing chamber 10 is fixedly connected to the vacuum chamber 17. There are multiple vacuum chambers 17, which are equidistantly distributed inside the silencing chamber 10. The resistive silencing mechanism 18 is located in the gap formed between adjacent vacuum chambers 17, and the two sides of the resistive silencing mechanism 18 are respectively attached to the corresponding vacuum chamber 17.

[0036] The silencing mechanism 7 includes a silencing chamber 10, a resistive silencing mechanism 18, and silencing cotton 19. The interior of the resistive silencing mechanism 18 includes a first micro-perforated plate 20, a second micro-perforated plate 21, and a third micro-perforated plate 22. The micro-holes on the first micro-perforated plate 20, the second micro-perforated plate 21, and the third micro-perforated plate 22 are staggered. The front end of the second arc-shaped plate 15 is provided with a threaded sleeve 16 at the center of the rubber ring 11. The lower end of the threaded sleeve 16 is slidably connected to the upper end face of the silencing chamber 10. The inner wall of the threaded sleeve 16 is threadedly connected to the exhaust port 3. The front end of the exhaust port 3 passes through the threaded sleeve 16 and enters the interior of the silencing chamber 10.

[0037] Working principle: When the pneumatic pump is running, compressed gas enters from the upward-sloping air inlet 2 in the middle of the pump body 1. After the diaphragm assembly inside the pump body 1 performs work through reciprocating motion, the high-pressure gas is discharged from the downward-sloping exhaust port 3 in the middle of the pump body 1. The exhaust port 3 and the silencer 4 are connected by a threaded sleeve 16. This connection method not only ensures the stability of the exhaust channel, but also provides a basis for the installation of the buffer mechanism 6.

[0038] The buffer mechanism 6 is installed outside the threaded sleeve 16 and does not directly contact the exhaust gas, yet it plays a crucial role in vibration reduction and noise reduction. Its rubber ring 11 is fixed to the inner wall of the muffler 4, and the inner wall is connected to the first arc-shaped plate 12, forming a flexible buffer boundary outside the threaded sleeve 16. When high-pressure gas is discharged from the exhaust port 3, the impact force generated by the gas kinetic energy is transmitted to the connection between the exhaust port 3 and the muffler 4, acting on the threaded sleeve 16. At this time, the second arc-shaped plate 15, which is in contact with the outside of the threaded sleeve 16, moves backward under the impact force, thereby compressing the spring 13. Simultaneously, the guide rod 14 drives the first... The arc plate 12 compresses the rubber ring 11, and the elastic deformation of the spring 13 and the flexible compression of the rubber ring 11 work together to convert the impact force into elastic potential energy and the deformation energy of the rubber, absorbing part of the kinetic energy of the gas, greatly reducing the impact intensity of the airflow on the connection position, effectively avoiding loosening and wear of the connection due to the impact of high-pressure gas, as well as the additional vibration noise generated therefrom. The threaded sleeve 16 not only stabilizes the connection between the exhaust port 3 and the muffler 4, but also, through cooperation with the front center of the second arc plate 15, evenly distributes the buffer force to the connection part, while guiding the airflow smoothly into the muffler chamber 10 along the central axis.

[0039] Subsequently, the buffered airflow enters the silencing mechanism 7. Multiple equidistant vacuum chambers 17 within the silencing chamber 10 utilize the sound-blocking properties of vacuum to reduce the propagation of high-frequency noise. Simultaneously, sound waves reflect and interfere between the vacuum chambers 17, further weakening the noise. The first micro-perforated plate 20, the second micro-perforated plate 21, and the third micro-perforated plate 22 in the reactive silencing mechanism 18 have staggered micro-perforations. When airflow passes through, sound waves of different frequencies resonate within the micro-perforations, consuming sound energy and achieving broadband noise filtering. Adjacent vacuum chambers 1... The gap between the 7 and the micro-perforated plate form a resonant cavity, which absorbs noise at specific frequencies and optimizes the noise spectrum. Finally, the sound-absorbing cotton 19 uses its own porous structure to absorb residual mid-to-high frequency noise through friction and adhesion. The gas after multi-stage noise reduction is finally discharged quietly through the exhaust port 5 on the outside of the muffler 4. Throughout the process, the design of the oblique exhaust port 3 reduces the impact noise of the airflow on the inner wall of the muffler 4. The muffler 4 is installed in a modular way by fixing the cover plate 8 with bolts 9, which facilitates later maintenance and component replacement.

[0040] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An exhaust silencer mechanism for a pneumatic pump, comprising a pump body (1), characterized in that: The pump body (1) has an exhaust port (3) that is obliquely downward in the middle. A silencer (4) is provided at the front end of the exhaust port (3). A buffer mechanism (6) is provided near the exhaust port (3) of the silencer (4). A silencing mechanism (7) is provided away from the exhaust port (3) of the silencer (4). The buffer mechanism (6) includes a rubber ring (11), a first arc plate (12), a spring (13), a guide rod (14), a second arc plate (15), and a threaded sleeve (16). The silencing mechanism (7) includes a silencing chamber (10), a resistance silencing mechanism (18), and silencing cotton (19).

2. The exhaust silencer mechanism for a pneumatic pump according to claim 1, characterized in that: An air inlet (2) is obliquely upward in the middle of the pump body (1).

3. The exhaust silencer mechanism for a pneumatic pump according to claim 1, characterized in that: The front end face of the muffler (4) is fixedly connected to a cover plate (8) by bolts (9), and an exhaust hole (5) is provided on the outside of the muffler (4).

4. The exhaust silencer mechanism for a pneumatic pump according to claim 1, characterized in that: The outer side of the rubber ring (11) is fixedly connected to the inner wall of the muffler (4), and the inner wall of the rubber ring (11) is fixedly connected to the first arc plate (12).

5. The exhaust silencer mechanism for a pneumatic pump according to claim 1, characterized in that: The spring (13) is located between the first arc plate (12) and the second arc plate (15). The rear end of the second arc plate (15) is fixedly connected to the guide rod (14). The front end of the guide rod (14) passes through the first arc plate (12) and extends into the interior of the rubber ring (11).

6. The exhaust silencer mechanism for a pneumatic pump according to claim 1, characterized in that: The inner wall of the silencer (4) is fixedly connected to the silencing chamber (10), and the inner wall of the silencing chamber (10) is fixedly connected to the vacuum chamber (17). There are multiple vacuum chambers (17) and they are evenly distributed inside the silencing chamber (10). The resistive silencing mechanism (18) is located in the gap formed between adjacent vacuum chambers (17), and the two sides of the resistive silencing mechanism (18) are respectively attached to the corresponding vacuum chambers (17).

7. The exhaust silencer mechanism for a pneumatic pump according to claim 1, characterized in that: The interior of the resistance silencing mechanism (18) includes a first micro-perforated plate (20), a second micro-perforated plate (21) and a third micro-perforated plate (22), and the micro-holes on the first micro-perforated plate (20), the second micro-perforated plate (21) and the third micro-perforated plate (22) are staggered.

8. The exhaust silencer mechanism for a pneumatic pump according to claim 1, characterized in that: The front end of the second arc plate (15) is provided with a threaded sleeve (16) at the center of the rubber ring (11). The lower end of the threaded sleeve (16) is slidably connected to the upper end face of the silencing chamber (10). The inner wall of the threaded sleeve (16) is threadedly connected to the exhaust port (3). The front end of the exhaust port (3) passes through the threaded sleeve (16) and enters the interior of the silencing chamber (10).

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