Air exhaust and noise reduction silencer for compressed air pneumatic valve

Abstract

The invention relates to an exhaust and noise reduction silencer for a compressed air pneumatic valve, which comprises a shell in which an accommodating space is formed; the density rubber pipe is arranged in the containing space, the density rubber pipe comprises an inner rubber layer, an outer rubber layer and a sound absorption layer, and the inner wall of the inner rubber layer is uneven; the sound absorption layer covers the outer side of the inner rubber layer, and the outer rubber layer covers the outer side of the sound absorption layer; a connecting hole is formed in the side, close to the density rubber pipe, of the shell. The air inlet end of the density rubber pipe is connected with the pneumatic valve through the connecting hole. The silencing pipe is arranged in the containing space, and the silencing pipe is connected with the gas outlet end of the density rubber pipe and used for further silencing the gas; the silencing cotton is arranged in the shell, the silencing cotton is connected with the inner wall of the shell, and the silencing cotton abuts against the silencing pipe. By the adoption of the structure, medium-high frequency noise is eliminated through the density rubber pipe, multi-stage noise reduction of the noise is achieved through the arrangement of the noise elimination pipe and the noise elimination cotton in a matched mode, the noise reduction effect of the silencer is effectively improved, and the equipment cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of mufflers, and particularly to a muffler for reducing exhaust noise of a compressed air pneumatic valve. Background Art

[0002] In the industrial field, as a key power source, the compressed air system is widely used in multiple industries such as electric power, petrochemical, metallurgy, mining, and textile. However, when the compressed air pneumatic valve exhausts, the release of high-pressure gas will generate huge noise, which not only disturbs the working environment but may also damage the hearing of employees in the workshop. In the prior art, due to different material selections and structural designs of the mufflers used in the workshop, different types of mufflers need to be selected for different equipment, resulting in a low application range, poor sound absorption effect, and high cost.

[0003] Therefore, there is an urgent need to provide a muffler for reducing exhaust noise of a compressed air pneumatic valve to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies and defects of the prior art and provide a muffler for reducing exhaust noise of a compressed air pneumatic valve. The density rubber tube completes the elimination of medium and high-frequency noise, and with the arrangement of the sound-absorbing tube and sound-absorbing cotton, multi-stage noise reduction of the noise is achieved, effectively improving the noise reduction effect of the muffler.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A muffler for reducing exhaust noise of a compressed air pneumatic valve, characterized by comprising:

[0007] A housing, which has an accommodation space inside;

[0008] A density rubber tube, arranged in the accommodation space. The density rubber tube includes an inner rubber layer, an outer rubber layer, and a sound-absorbing layer. The inner wall of the inner rubber layer is unevenly arranged; the sound-absorbing layer is coated on the outside of the inner rubber layer, and the outer rubber layer is coated on the outside of the sound-absorbing layer; a connection hole is provided on one side of the housing close to the density rubber tube, and the air inlet end of the density rubber tube is connected to the pneumatic valve through the connection hole;

[0009] A sound-absorbing tube, arranged in the accommodation space, and the sound-absorbing tube is connected to the air outlet end of the density rubber tube for further noise reduction of the gas;

[0010] Sound-absorbing cotton, arranged inside the housing, the sound-absorbing cotton is connected to the inner wall of the housing and abuts against the sound-absorbing tube.

[0011] Optionally, the housing includes an upper cover, a lower cover, and an outer shell. The upper cover and the lower cover are respectively covered at both ends of the outer shell, and the connection hole is provided on the upper cover. The sound-absorbing cotton is connected to the inner wall of the lower cover.

[0012] Optionally, several groups of through holes are also provided on the side wall of the housing, and the accommodation space communicates with the outside through the through holes.

[0013] Optionally, a reinforcing layer is further provided between the sound absorption layer and the outer rubber layer, and the reinforcing layer is configured as high-density fiber or wound steel wire.

[0014] Optionally, the sound-absorbing cotton is configured as sound-absorbing and flame-retardant foam cotton.

[0015] Optionally, the exhaust noise reduction muffler for the compressed air pneumatic valve further includes a connector and a quick connector. The connector is arranged inside the housing and is connected to the air inlet end of the density rubber tube; the quick connector is arranged outside the upper cover, and the connector and the quick connector are connected through a connection hole.

[0016] Optionally, multiple groups of the density rubber tubes and the sound-absorbing tubes are provided, and the air outlet end of each density rubber tube is correspondingly connected to a group of sound-absorbing tubes.

[0017] Optionally, the exhaust noise reduction muffler for the compressed air pneumatic valve further includes a PVC tube. The PVC tube is arranged inside the housing, and multiple groups of the density rubber tubes are all arranged inside the PVC tube.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, an accommodation space is provided inside the housing. The density rubber tube, the sound-absorbing tube and the sound-absorbing cotton are all arranged in the accommodation space. The density rubber tube includes an inner rubber layer, an outer rubber layer and a sound absorption layer. The inner wall of the inner rubber layer is unevenly arranged, forming more irregular structures, which improves the overall sound absorption performance; the sound absorption layer is coated on the outside of the inner rubber layer, and through the arrangement of the sound absorption layer, the sound is further eliminated and insulated; the outer rubber layer is coated on the outside of the sound absorption layer, which is used to protect the internal structure of the pipeline; a connection hole is provided on one side of the housing close to the density rubber tube, and the air inlet end of the density rubber tube is connected to the pneumatic valve through the connection hole; the sound-absorbing tube is arranged in the accommodation space, and the sound-absorbing tube is connected to the air outlet end of the density rubber tube, and the sound-absorbing tube performs secondary sound elimination on the sound wave; the sound-absorbing cotton is arranged inside the housing, and one end of the sound-absorbing cotton is connected to the inner wall of the housing for the third sound elimination; through the arrangement of the above components, the density rubber tube completes the elimination of medium and high-frequency noise, and in cooperation with the arrangement of the sound-absorbing tube and the sound-absorbing cotton, multi-stage noise elimination is realized, effectively improving the noise reduction effect of the muffler, and the equipment cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present invention.

[0021] Figure 2 is an exploded structural diagram of the present invention.

[0022] Figure 3 This is the top view of the present invention.

[0023] Figure 4 This is a schematic cross-sectional view of the medium-density rubber tube of the present invention.

[0024] Among them, the above-mentioned drawings include the following reference numerals:

[0025] 1. Housing, 11. Upper cover, 12. Lower cover, 13. Outer shell, 131. Through hole, 14. Accommodating space, 2. Medium-density rubber tube, 21. Inner rubber layer, 22. Sound-absorbing layer, 23. Reinforcing layer, 24. Outer rubber layer, 3. Muffler tube, 4. Sound-absorbing cotton, 51. Connector, 52. Quick connector, 6. PVC tube. Detailed implementation manners

[0026] The present invention will be further described in detail below in conjunction with embodiments and the drawings, but the implementation manners of the present invention are not limited thereto.

[0027] The technical solution of the present invention provides a compressed air pneumatic valve exhaust noise reduction muffler.

[0028] Referring to Figures 1 to 4 , in this embodiment, it includes:

[0029] A housing 1, and an accommodating space 14 is provided inside the housing 1;

[0030] A medium-density rubber tube 2, which is arranged in the accommodating space 14. The medium-density rubber tube 2 includes an inner rubber layer 21, an outer rubber layer 24 and a sound-absorbing layer 22. The inner wall of the inner rubber layer 21 is unevenly arranged; the sound-absorbing layer 22 is coated on the outside of the inner rubber layer 21, and the outer rubber layer 24 is coated on the outside of the sound-absorbing layer 22; a connection hole is provided on one side of the housing 1 close to the medium-density rubber tube 2, and the air inlet end of the medium-density rubber tube 2 is connected to the pneumatic valve through the connection hole;

[0031] A muffler tube 3, which is arranged in the accommodating space 14 and is connected to the air outlet end of the medium-density rubber tube 2 for further muffling the gas;

[0032] Sound-absorbing cotton 4, which is arranged inside the housing 1, is connected to the inner wall of the housing 1, and the sound-absorbing cotton 4 abuts against the muffler tube 3.

[0033] Optionally, in this embodiment, the compressed air pneumatic valve exhaust noise reduction muffler includes a housing 1, a density rubber tube 2, a muffler tube 3, and sound-absorbing cotton 4. The housing 1 is provided with an accommodation space 14, and the density rubber tube 2, the muffler tube 3, and the sound-absorbing cotton 4 are all arranged in the accommodation space 14. The density rubber tube 2 includes an inner rubber layer 21, an outer rubber layer 24, and a sound-absorbing layer 22. The inner rubber layer 21 needs to be in direct contact with the conveyed medium, that is, compressed air. The inner wall of the inner rubber layer 21 is unevenly arranged, forming more irregular structures. These structures can scatter and absorb more effectively. The sound wave energy will be dispersed in different directions, thereby reducing the sound wave propagation efficiency. At the same time, the uneven surface can adapt to sound waves of different frequencies, improving the overall sound absorption performance. The sound-absorbing layer 22 is coated on the outside of the inner rubber layer 21. Through the setting of the sound-absorbing layer 22, the sound is further sound-insulated. The outer rubber layer 24 is coated on the outside of the sound-absorbing layer 22, with good wear resistance and aging resistance, and is used to protect the internal structure of the pipeline and prevent the internal structure from being damaged by the external environment. The density rubber tube 2 plays a major role in eliminating medium and high-frequency sound waves, and the cost of the density rubber tube 2 is relatively low. A connection hole is provided on one side of the housing 1 close to the density rubber tube 2. The intake end of the density rubber tube 2 is connected to the pneumatic valve through the connection hole, that is, the gas enters the density rubber tube 2 through the connection hole. The muffler tube 3 is arranged in the accommodation space 14, and the muffler tube 3 is connected to the outlet end of the density rubber tube 2. The muffler tube 3 performs secondary sound elimination on the sound waves. The sound-absorbing cotton 4 is arranged in the housing 1. One end of the sound-absorbing cotton 4 is connected to the inner wall of the housing 1, and the other end abuts against the muffler tube 3. That is, after the gas and sound waves pass through the muffler tube 3, they enter the sound-absorbing cotton 4 for the third sound elimination. Through the setting of the above components, the density rubber tube 2 completes the elimination of medium and high-frequency noise. With the setting of the muffler tube 3 and the sound-absorbing cotton 4, multi-stage noise elimination of the noise is achieved, effectively improving the noise reduction effect of the muffler, and the equipment cost is relatively low.

[0034] In this embodiment, the housing 1 includes an upper cover 11, a lower cover 12, and an outer shell 13. The upper cover 11 and the lower cover 12 are respectively covered at both ends of the outer shell 13, that is, the upper cover 11 and the lower cover 12 are detachably connected to the outer shell 13, which is convenient for subsequent maintenance and component replacement inside. The connection hole is arranged on the upper cover 11, that is, the density rubber tube 2 is connected to the pneumatic valve through the connection hole arranged on the upper cover 11, and the sound-absorbing cotton 4 is connected to the inner wall of the lower cover 12. Further, in this embodiment, several groups of through holes 131 are provided on the side wall of the outer shell 13. The accommodation space 14 is communicated with the outside through the through holes 131. The setting of the through holes 131 is used to discharge the sound-absorbed gas and can play a heat dissipation effect to prevent the temperature inside the muffler from being too high.

[0035] In this embodiment, a reinforcing layer 23 is further provided between the sound-absorbing layer 22 and the outer rubber layer 24, and the reinforcing layer 23 is configured as high-density fiber or wound steel wire. By providing the reinforcing layer 23, the strength and pressure-bearing capacity of the rubber tube are enhanced to prevent the pipeline from deforming or cracking during use; further, in this embodiment, the sound-absorbing cotton 4 is configured as sound-absorbing and flame-retardant foam cotton. The sound-absorbing and flame-retardant foam cotton has excellent sound-absorbing performance and can effectively absorb sound waves and reduce noise pollution. At the same time, since the main raw material of the sound-absorbing and flame-retardant foam cotton is melamine foam, it has certain flame-retardant performance and can prevent spontaneous combustion caused by too high temperature inside the muffler.

[0036] In this embodiment, the compressed air pneumatic valve exhaust noise reduction muffler further includes a connector 51 and a quick connector 52. The connector 51 is provided inside the housing 1 and is connected to the air inlet end of the density rubber tube 2. The quick connector 52 is provided outside the upper cover 11. The connector 51 and the quick connector 52 are connected through a connection hole. By providing the quick connector 52 and the connector 51, the connection between the density rubber tube 2 and the pneumatic valve can be made stable, and at the same time, subsequent disassembly and connection are also convenient.

[0037] In this embodiment, multiple groups of the density rubber tubes 2 and the sound-absorbing tubes 3 are provided. The air outlet end of each group of density rubber tubes 2 is correspondingly connected to a group of sound-absorbing tubes 3. By providing multiple groups of density rubber tubes 2 and sound-absorbing tubes 3, the sound reduction efficiency of the gas can be improved; further, in this embodiment, the compressed air pneumatic valve exhaust noise reduction muffler further includes a PVC tube. The PVC tube is provided inside the housing 1, and multiple groups of density rubber tubes 2 are all provided inside the PVC tube to limit the position of the density rubber tubes 2 and prevent excessive shaking during movement. At the same time, the PVC tube provides further protection for the density rubber tubes 2 to avoid the influence of the external environment on the density rubber tubes 2.

[0038] The described embodiments only represent the implementation manners of the present invention, and the description is relatively specific and detailed, but it cannot be thus understood as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A compressed air pneumatic valve exhaust noise reduction muffler, characterized in that: include: A housing, wherein a receiving space is provided in the housing; A density rubber tube is arranged in the accommodation space, the density rubber tube comprises an inner rubber layer, an outer rubber layer and a sound absorbing layer, the inner wall of the inner rubber layer is unevenly arranged; the sound absorbing layer is coated on the outer side of the inner rubber layer, and the outer rubber layer is coated on the outer side of the sound absorbing layer; a connecting hole is arranged on one side of the shell close to the density rubber tube, and the air inlet end of the density rubber tube is connected to the pneumatic valve through the connecting hole; A silencer pipe is arranged in the accommodation space and connected to the gas outlet end of the density rubber pipe to further silence the gas; The sound-absorbing cotton is arranged in the shell, connected to the inner wall of the shell, and abuts against the sound-absorbing pipe.

2. A compressed air pneumatic valve exhaust noise reduction muffler according to claim 1, characterized in that: The shell comprises an upper cover, a lower cover and an outer shell, wherein the upper cover and the lower cover are respectively arranged at two ends of the outer shell, and the connecting hole is arranged on the upper cover, and the sound-absorbing cotton is connected to the inner wall of the lower cover.

3. A compressed air pneumatic valve exhaust noise reduction muffler according to claim 2, characterized in that: The side wall of the shell is also provided with a plurality of groups of through holes, and the accommodating space is connected with the outside through the through holes.

4. A compressed air pneumatic valve exhaust noise reduction muffler according to claim 1, characterized in that: A reinforcement layer is also provided between the sound absorbing layer and the outer rubber layer, and the reinforcement layer is configured as high-density fibers or wound steel wires.

5. The compressed air pneumatic valve exhaust noise reduction muffler according to claim 1, characterized in that: The sound-absorbing cotton is configured as sound-absorbing and flame-retardant foam cotton.

6. A compressed air pneumatic valve exhaust noise reduction muffler according to claim 3, characterized in that: The compressed air pneumatic valve exhaust noise reduction muffler also includes a connector and a quick connector. The connector is arranged in the shell and connected to the air inlet end of the density rubber tube; the quick connector is arranged on the outside of the upper cover, and the connector and the quick connector are connected through a connecting hole.

7. A compressed air pneumatic valve exhaust noise reduction muffler according to claim 1, characterized in that: The density rubber tubes and the silencer tubes are provided in a plurality of groups, and the air outlet end of each density rubber tube is correspondingly connected to a group of silencer tubes.

8. A compressed air start valve exhaust noise reduction muffler according to claim 7, characterized in that: The compressed air pneumatic valve exhaust noise reduction muffler also includes a PVC pipe, the PVC pipe is arranged in the shell, and the multiple groups of density rubber pipes are all arranged in the PVC pipe.

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