Silencing structure of local fan

Abstract

The utility model discloses a local fan noise reduction structure which comprises an outer shell, an outer noise reduction layer is arranged on the inner wall of the outer shell, a middle noise reduction barrel is arranged in the outer noise reduction layer, an inner core noise reduction layer is arranged in the middle noise reduction barrel, and an inner core noise reduction layer is arranged in the inner core noise reduction barrel. The outer wall of the outer silencing layer, the outer wall of the middle silencing cylinder and the outer wall of the inner core silencing layer are each provided with a separation net, the outer silencing layer, the middle silencing cylinder and the inner core silencing layer are each filled with silencing cotton, and an arc-shaped cap is installed at one end of the inner core silencing layer. The utility model relates to the technical field of mine tunnel equipment, and solves the technical problems that in the prior art, when a local fan works, airflow vortex, wheel blade rotation or mechanical vibration can generate large noise, and the large noise is transmitted to the surrounding environment through an inlet and an outlet of the local fan and spread in a mine tunnel, so that the construction environment in the mine tunnel is poor, and the construction cost is low. And hearing impairment of construction workers is easily caused.

Description

Technical Field

[0001] The utility model relates to the technical field of mine tunnel equipment, in particular to a local fan silencing structure. Background Art

[0002] Local fans are mainly used for ventilation of tunneling and mining working faces, and can also be used for other underground locations that require airflow. Local fan ventilation is a local location ventilation method that uses a local ventilator as a power source to press outdoor fresh air through a wind tube into the tunneling or mining working face. In the prior art, when the local fan is working, wind vortexes, blade rotation or mechanical vibrations will generate loud noises, which are transmitted from the inlet and outlet of the local fan to the surrounding environment and spread in the mine, resulting in a poor construction environment in the mine, which can easily cause hearing loss to construction workers. Summary of the invention

[0003] In view of the shortcomings of the prior art, the utility model provides a local fan silencer structure, which solves the problem in the prior art that when the local fan is working, wind vortex, blade rotation or mechanical vibration will generate large noise, which is transmitted to the surrounding environment through the inlet and outlet of the local fan and propagated in the mine tunnel, resulting in a poor construction environment in the mine tunnel and easily causing hearing damage to construction workers.

[0004] To achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: a local fan sound-absorbing structure, comprising an outer shell, the inner wall of the outer shell is provided with an external sound-absorbing layer, the interior of the external sound-absorbing layer is provided with an intermediate sound-absorbing tube, the interior of the intermediate sound-absorbing tube is provided with an inner core sound-absorbing layer, the outer walls of the external sound-absorbing layer, the intermediate sound-absorbing tube and the inner core sound-absorbing layer are all provided with isolation nets, the interiors of the external sound-absorbing layer, the intermediate sound-absorbing tube and the inner core sound-absorbing layer are all filled with sound-absorbing cotton, an arc-shaped cap is installed at one end of the inner core sound-absorbing layer, the two ends of the external sound-absorbing layer, the intermediate sound-absorbing tube and the inner core sound-absorbing layer are fixedly connected by a fixing plate, the two ends of the outer shell are fixedly connected with end plates, and a connecting pipe is provided on the outer side of the end plate close to the arc-shaped cap.

[0005] Preferably, the outer wall of the isolation net is equidistantly provided with reinforcement strips, the outer wall of the isolation net located in the inner core sound-absorbing layer is cooperatively connected with a reinforcement tube, the outer wall of the reinforcement tube is equidistantly fixedly connected with support strips, and the support strips are fixedly connected to the reinforcement strips.

[0006] Preferably, beveled openings are provided on the inner sides of both ends of the middle silencer, and beveled edges are provided on both ends of the reinforcement pipe, and the beveled edges are cooperatively connected with the middle silencer.

[0007] Preferably, connecting plates are provided on both sides of the bottom of the shell, a fixing seat is provided at the bottom of the connecting plates, and buffer pads are equidistantly provided at the bottom of the fixing seat.

[0008] Preferably, limiting protrusions are equidistantly arranged on the outer wall of the connecting pipe.

[0009] The utility model provides a local fan silencing structure. It has the following beneficial effects: the local fan silencing structure, through the cooperation between the outer shell, the external silencing layer, the middle silencing tube, the inner core silencing layer, the silencing cotton, the isolation net, the arc cap, the fixing plate, the end plate and the connecting pipe, by installing the silencing structure with three layers of silencing at the input end of the local fan, the sound waves generated by the local fan are repeatedly refracted between the three layers of silencing structure, and are offset and absorbed by the silencing cotton, reducing the propagation of the sound waves to the surrounding environment, which can further improve the noise reduction effect of the local fan, thereby reducing the noise decibel in the mine tunnel, and can reduce the hearing damage to the construction workers, which is helpful to improve the construction environment in the mine tunnel.

[0010] Through the coordination among the external sound-absorbing layer, the middle sound-absorbing tube, the inner core sound-absorbing layer, the reinforcement strips, the reinforcement tubes and the support strips, and by supporting and fixing the inside of the local fan sound-absorbing structure through the support strips, the stability of the external sound-absorbing layer, the middle sound-absorbing tube and the inner core sound-absorbing layer can be improved, and the deformation of each layer of the sound-absorbing structure under the action of negative pressure can be prevented, thereby ensuring the stability of the sound-absorbing structure, thereby improving the service life and compressive strength of the local fan sound-absorbing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the appearance of the utility model;

[0013] Figure 3 for Figure 1 A partial enlarged view of the middle A area;

[0014] Figure 4 for Figure 1 A partial enlarged view of the middle B area;

[0015] Figure 5 for Figure 1 A partial enlarged view of the middle C area.

[0016] In the figure: 1. outer shell, 2. outer sound-absorbing layer, 3. middle sound-absorbing tube, 4. inner core sound-absorbing layer, 5. sound-absorbing cotton, 6. isolation net, 7. arc cap, 8. fixing plate, 9. end plate, 10. connecting pipe, 11. reinforcement strip, 12. reinforcement pipe, 13. support strip, 14. oblique mouth, 15. bevel edge, 16. connecting plate, 17. fixing seat, 18. buffer pad, 19. limiting protrusion. DETAILED DESCRIPTION

[0017] 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 in 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.

[0018] In the prior art, when the local fan is working, wind vortex, blade rotation or mechanical vibration will generate large noise, which is transmitted to the surrounding environment through the inlet and outlet of the local fan and propagated in the mine tunnel, resulting in a poor construction environment in the mine tunnel and easily causing hearing loss to construction workers.

[0019] In view of this, the utility model provides a local fan sound-absorbing structure, which cooperates among an outer shell, an outer sound-absorbing layer, an intermediate sound-absorbing tube, an inner core sound-absorbing layer, sound-absorbing cotton, an isolation net, an arc cap, a fixing plate, an end plate and a connecting pipe, and installs a sound-absorbing structure with three layers of sound-absorbing at the input end of the local fan. The sound waves generated by the local fan are reduced in propagation to the surrounding environment under the action of the three-layer sound-absorbing structure, thereby further improving the noise reduction effect of the local fan, reducing the noise decibels in the mine tunnel, and reducing the hearing damage to construction workers.

[0020] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principles and processes, and no longer explains the electrical control.

[0021] Depend on Figure 1-5 It can be seen that a local fan noise reduction structure comprises a shell 1, an inner wall of the shell 1 is provided with an external noise reduction layer 2, an inner part of the external noise reduction layer 2 is provided with an intermediate noise reduction tube 3, an inner part of the intermediate noise reduction tube 3 is provided with an inner core noise reduction layer 4, the outer walls of the external noise reduction layer 2, the intermediate noise reduction tube 3 and the inner core noise reduction layer 4 are provided with an isolation net 6, the inner parts of the external noise reduction layer 2, the intermediate noise reduction tube 3 and the inner core noise reduction layer 4 are filled with noise reduction cotton 5, an arc cap 7 is installed at one end of the inner core noise reduction layer 4, the arc cap 7 is arranged at the air outlet end of the inner core noise reduction layer 4 of the local fan noise reduction device, and is used to fix the inner core noise reduction layer 4, the two ends of the external noise reduction layer 2, the intermediate noise reduction tube 3 and the inner core noise reduction layer 4 are fixedly connected by a fixing plate 8, the two ends of the shell 1 are fixedly connected with end plates 9, and a connecting pipe 10 is arranged on the outer side of the end plate 9 close to the arc cap 7;

[0022] In the specific implementation process, it is worth pointing out that the outer shell 1 is the outer shell of the local fan noise reduction structure, and the main structure of the outer noise reduction layer 2, the middle noise reduction tube 3 and the inner core noise reduction layer 4 is formed through the cooperation between the noise reduction cotton 5 and the isolation net 6, wherein the outer noise reduction layer 2 and the middle noise reduction tube 3 are both cylindrical structures, and the inner core noise reduction layer 4 is a conical structure, and the outer noise reduction layer 2 and the middle noise reduction tube 3, and the middle noise reduction tube 3 and the inner core noise reduction layer 4 are wind channels, and the arc cap 7 is arranged at the air outlet end of the inner core noise reduction layer 4 of the local fan noise reduction device, which is used to fix the inner core noise reduction layer 4, and the connection and fixation between the outer noise reduction layer 2, the middle noise reduction tube 3, the inner core noise reduction layer 4 and the fixing plate 8 are realized, so that the local fan noise reduction structure has a three-layer noise reduction structure, and the inner core noise reduction layer 4 adopts a conical design, so that the sound waves in the middle noise reduction tube 3 and the inner core sound-absorbing layer 4 are refracted inwardly, so that the noise generated by the input end of the local fan is reduced to the surrounding environment under the action of the three-layer sound-absorbing structure. The outer sound-absorbing layer 2 in the outer shell 1 is fixed by the cooperation among the outer shell 1, the outer sound-absorbing layer 2, the end plate 9 and the connecting pipe 10, and the connection and fixation between the sound-absorbing structure and the local fan is realized by the connection and fixation between the connecting pipe 10 and the input end of the local fan. Through the cooperation among the outer shell 1, the outer sound-absorbing layer 2, the middle sound-absorbing tube 3, the inner core sound-absorbing layer 4, the sound-absorbing cotton 5, the isolation net 6, the arc cap 7, the fixing plate 8, the end plate 9 and the connecting pipe 10, the sound-absorbing structure with three layers of sound-absorbing is installed at the input end of the local fan, so that the sound waves generated by the local fan are reduced to the surrounding environment under the action of the three-layer sound-absorbing structure, thereby further improving the noise reduction effect of the local fan, reducing the noise decibel in the mine tunnel, and reducing the hearing damage to the construction workers;

[0023] Furthermore, the outer wall of the isolation net 6 is equidistantly provided with reinforcement strips 11, which are used to support and reinforce the isolation net 6 to prevent the isolation net 6 from deforming under the action of negative pressure. The outer wall of the isolation net 6 located in the inner core sound-absorbing layer 4 is cooperatively connected with a reinforcement tube 12, which is used to support and reinforce the inner core sound-absorbing layer 4. The outer wall of the reinforcement tube 12 is equidistantly fixedly connected with support strips 13, and the support strips 13 are fixedly connected to the reinforcement strips 11;

[0024] In the specific implementation process, it is worth pointing out that the reinforcement strip 11 is used to support and reinforce the isolation net 6 to prevent the isolation net 6 from being deformed under the action of negative pressure, so that the isolation net 6 is stably fixed in the local fan noise reduction structure, and the reinforcement tube 12 is used to support and reinforce the inner core noise reduction layer 4. Through the cooperation between the external noise reduction layer 2, the middle noise reduction tube 3, the inner core noise reduction layer 4, the reinforcement strip 11, the reinforcement tube 12 and the support strip 13, the support and fixation inside the local fan noise reduction structure through the support strip 13 improves the stability of the external noise reduction layer 2, the middle noise reduction tube 3 and the inner core noise reduction layer 4, prevents the noise reduction structures of each layer from being deformed under the action of negative pressure, ensures the stability of the noise reduction structure, and improves the service life and compressive strength of the local fan noise reduction structure;

[0025] Furthermore, the inner sides of both ends of the middle silencer 3 are provided with oblique openings 14, and both ends of the reinforcement pipe 12 are provided with oblique edges 15, and the oblique edges 15 are connected with the middle silencer 3 in a coordinated manner;

[0026] In the specific implementation process, it is worth pointing out that, through the cooperation between the middle silencer 3 and the oblique opening 14, the wind flow is guided by the oblique openings 14 at both ends of the middle silencer 3, so that the wind flow delivery is more stable, and the wind flow is prevented from generating wind flow vortex at the wind flow input end of the local fan muffler structure, and the noise of the wind flow vortex is prevented from being generated by the local fan muffler structure. Through the cooperation between the middle silencer 3, the reinforcement pipe 12 and the oblique edge 15, the wind flow is guided by the oblique edge 15, and the wind flow is prevented from generating wind flow vortex at the reinforcement pipe 12, thereby further ensuring the noise reduction effect of the local fan muffler structure.

[0027] Furthermore, connecting plates 16 are provided on both sides of the bottom of the housing 1, a fixing seat 17 is provided at the bottom of the connecting plate 16, and buffer pads 18 are equidistantly provided at the bottom of the fixing seat 17. The buffer pads 18 are made of rubber or other materials and are used to isolate the fixing seat 17 from other fixing surfaces, slow down the conduction of vibration, improve the stability of the silencer structure of the local fan, and reduce the noise generated by mechanical vibration.

[0028] In the specific implementation process, it is worth pointing out that the support of the local fan silencer structure and the connection and fixation with other fixed surfaces are realized through the cooperation between the shell 1, the connecting plate 16 and the fixing seat 17. The buffer pad 18 is made of rubber and other materials to isolate the fixing seat 17 from other fixed surfaces, slow down the conduction of vibration, improve the stability of the local fan silencer structure, and reduce the noise generated by mechanical vibration.

[0029] Furthermore, the outer wall of the connecting pipe 10 is provided with limiting protrusions 19 at equal intervals;

[0030] In the specific implementation process, it is worth pointing out that, through the cooperation between the connecting pipe 10 and the limiting protrusion 19, the fixing bolts on the outer side of the input end of the local fan are clamped between the limiting protrusions 19 for fixing, which facilitates the connection and fixing between the local fan and the silencer structure, and improves the convenience of installation and disassembly of the silencer structure;

[0031] Specifically, when the local fan silencer structure is used, the fixing bolts on the outside of the local fan input end are inserted between the limiting protrusions 19 to fix the connecting pipe 10 to the local fan input end, and the fixing seat 17 is fixed to the fixing surface to complete the installation between the local fan and the silencer structure. When the local fan is in use, the blades of the local fan rotate to generate negative pressure inside the local fan and the silencer structure. Air is input from the end of the local fan silencer structure away from the local fan, and is transmitted to the end close to the local fan through the wind flow channels between the external silencer layer 2 and the middle silencer tube 3, and between the middle silencer tube 3 and the inner core silencer layer 4, and is transmitted to the inside of the local fan through the connecting pipe 10, forming a high-speed wind inside the local fan and the silencer structure. Flow, the sound waves generated by the rotation of the local fan blades are reflected between the external sound-absorbing layer 2 and the middle sound-absorbing tube 3, and between the middle sound-absorbing tube 3 and the inner core sound-absorbing layer 4. Most of the sound waves are absorbed and offset by the sound-absorbing cotton 5, thereby reducing the propagation of the sound waves to the surrounding environment and reducing the noise decibels in the mine tunnel. Through the cooperation among the outer shell 1, the external sound-absorbing layer 2, the middle sound-absorbing tube 3, the inner core sound-absorbing layer 4, the sound-absorbing cotton 5, the isolation net 6, the arc cap 7, the fixing plate 8, the end plate 9 and the connecting pipe 10, and by installing a sound-absorbing structure with three layers of sound-absorbing at the input end of the local fan, the sound waves generated by the local fan are reduced from propagating to the surrounding environment under the action of the three-layer sound-absorbing structure, thereby further improving the noise reduction effect of the local fan, reducing the noise decibels in the mine tunnel, and reducing the hearing damage to the construction workers.

[0032] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A local fan silencing structure, comprising a housing, characterized in that: An outer sound-absorbing layer is arranged on the inner wall of the outer sound-absorbing layer, an intermediate sound-absorbing tube is arranged inside the outer sound-absorbing layer, an inner core sound-absorbing layer is arranged inside the intermediate sound-absorbing tube, the outer walls of the outer sound-absorbing layer, the intermediate sound-absorbing tube and the inner core sound-absorbing layer are all provided with isolation nets, the inner parts of the outer sound-absorbing layer, the intermediate sound-absorbing tube and the inner core sound-absorbing layer are all filled with sound-absorbing cotton, an arc-shaped cap is installed at one end of the inner core sound-absorbing layer, both ends of the outer sound-absorbing layer, the intermediate sound-absorbing tube and the inner core sound-absorbing layer are fixedly connected by a fixing plate, both ends of the outer shell are fixedly connected with end plates, and a connecting pipe is arranged on the outer side of the end plate close to the arc-shaped cap.

2. A local fan silencing structure according to claim 1, characterized in that: The outer wall of the isolation net is equidistantly provided with reinforcement strips, the outer wall of the isolation net located in the inner core sound-absorbing layer is cooperatively connected with a reinforcement tube, the outer wall of the reinforcement tube is equidistantly fixedly connected with support strips, and the support strips are fixedly connected to the reinforcement strips.

3. A local fan silencing structure according to claim 2, characterized in that: The inner sides of both ends of the middle silencer are provided with oblique openings, and the inner sides of both ends of the reinforcement pipe are provided with oblique edges, and the oblique edges are connected with the middle silencer in a coordinated manner.

4. A local fan silencing structure according to claim 1, characterized in that: Connecting plates are arranged on both sides of the bottom of the shell, a fixing seat is arranged at the bottom of the connecting plates, and buffer pads are arranged at equal distances at the bottom of the fixing seat.

5. The local fan silencing structure according to claim 1 is characterized in that: The outer wall of the connecting pipe is provided with limiting protrusions at equal intervals.

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