Silencing device for air inlet of tunnel main ventilator

Abstract

The utility model provides a silencing device for an air inlet of a tunnel main ventilator. The silencing device comprises a ventilator body, the ventilator body comprises fan blades, a protective cover is installed on one side of the ventilator body, an annular groove is correspondingly formed in one side of the ventilator body, the protective cover is correspondingly installed in the annular groove, and a plurality of fixing rods are installed on one side of the protective cover. Through cooperative use of the protective cover, the annular groove, the fixing rod, the through groove and the protective plate, the sound-absorbing cotton can be rapidly detached or replaced so that a worker can conveniently maintain the sound-absorbing cotton, the worker can take out the sound-absorbing cotton only by opening the protective cover to enable the protective plate to lose limitation, and the sound-absorbing cotton can be conveniently taken out. And the subsequent replacement work can be completed without detaching the fan blades or the whole device, so that the labor amount of workers is reduced, and the device is simple, easy to use and convenient to implement.

Description

Technical Field

[0001] The utility model belongs to the technical field of silencing devices for ventilators, and more specifically, particularly relates to a silencing device for the air inlet of a main tunnel ventilator. Background Technique

[0002] During tunnel construction, the heat of hydration released by tunnel support and lining concrete, the heat emitted by mechanical operations, and the temperature rise caused by geothermal heat, combined with the narrow space inside the tunnel, make the temperature inside the tunnel very high. In order to reduce the temperature inside the tunnel and enable normal construction inside the tunnel, ventilators are generally used to forcibly send natural wind into the tunnel.

[0003] A local ventilator with a Chinese authorized publication number of CN218716935U reduces the noise of the device during operation by cooperating with the sound-absorbing cotton at the outer end of the ventilator, and the sound-absorbing cotton of the device can be disassembled and replaced, improving the practicability of the device. However, there are still some deficiencies when this patent is put into use. When the sound-absorbing cotton needs to be disassembled, assembled, or replaced, the entire device including the fan blades needs to be removed to replace and disassemble the sound-absorbing cotton. The overly cumbersome disassembly work increases the workload and labor intensity of the staff.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a silencing device for the air inlet of a main tunnel ventilator is provided, with the expectation of achieving a more practical value. Content of the Utility Model

[0005] In order to solve the above technical problems, the utility model provides a silencing device for the air inlet of a main tunnel ventilator, which is achieved by the following specific technical means:

[0006] A silencing device for the air inlet of a main tunnel ventilator includes a ventilator body, the ventilator body includes fan blades, a protective cover is installed on one side of the ventilator body, an annular groove is correspondingly opened on one side of the ventilator body, the protective cover is correspondingly installed inside the annular groove, a plurality of fixing rods are installed on one side of the protective cover, and a plurality of through grooves corresponding to the size of the fixing rods are opened on one side of the inner wall of the annular groove. A silencing mechanism is arranged inside the ventilator body, and a protective component is arranged on one side of the ventilator body.

[0007] Preferably, the silencing mechanism includes sound-absorbing cotton, a sound insulation board is abutted against one side of the sound-absorbing cotton, the outer side of the sound insulation board is adapted to the inner wall of the ventilator body in size, a threaded hole is jointly opened on one side of the sound insulation board and one side of the ventilator body, and bolts are jointly installed in the two threaded holes in a threaded manner.

[0008] Preferably, the protection component includes a protection plate. A plurality of guiding blocks are installed on one side of the protection plate. A plurality of guiding grooves corresponding to the guiding blocks in size are formed on both sides of the bottom of the ventilation fan body. A plurality of installation holes corresponding to the size of the fixing rods are formed on the end side of the protection plate. The plurality of installation holes and the plurality of through grooves are on the same central axis.

[0009] Preferably, a shock-absorbing ring is installed on one side of the fan blade. The outer side of the shock-absorbing ring is in fit with the inner wall of the ventilation fan body. One side of the shock-absorbing ring is in contact with one side of the sound-absorbing cotton. The shock-absorbing ring is made of EVA material.

[0010] Preferably, a plurality of sound-damping holes are formed on one side of both the sound-absorbing cotton and the sound-insulating board.

[0011] Preferably, a dust-proof net is arranged on one side of the protection cover. The plurality of fixing rods are in interference fit with the corresponding through grooves and installation holes respectively.

[0012] Preferably, two handles are installed at the bottom of the protection plate. A fixing frame is installed above the ventilation fan body.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. Through the combined use of the protection cover, annular groove, fixing rod, through groove and protection plate, the sound-absorbing cotton can be quickly disassembled or replaced, which is convenient for the staff to carry out maintenance. This setting enables the staff to only open the protection cover, so that the protection plate is no longer restricted, and then the sound-absorbing cotton can be taken out. It is not necessary to disassemble the fan blade or the whole device to complete the subsequent replacement work, reducing the labor intensity of the staff. This setting is simple and easy to use and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the main structure of the noise reduction device at the air inlet of the tunnel main ventilation fan of the utility model.

[0016] Figure 2 is an exploded view of the main structure of the noise reduction device at the air inlet of the tunnel main ventilation fan of the utility model.

[0017] Figure 3 is a partial exploded view of the noise reduction device at the air inlet of the tunnel main ventilation fan of the utility model.

[0018] Figure 4 is a partial exploded view of the noise reduction device at the air inlet of the tunnel main ventilation fan of the utility model.

[0019] In the figure, the corresponding relationship between the component names and the drawing reference numbers is as follows:

[0020] 1. Fan body; 2. Protective cover; 3. Annular groove; 4. Fixed rod; 5. Through groove; 6. Fan blades; 7. Protective plate; 8. Handle; 9. Guide block; 10. Guide groove; 11. Sound-absorbing cotton; 12. Sound-damping hole; 13. Sound-insulating board; 14. Bolt; 15. Threaded hole; 16. Fixed bracket; 17. Dust-proof net; 18. Shock-absorbing ring; 19. Mounting hole. Detailed implementation manners

[0021] The following further describes the implementation manners of the present utility model in detail with reference to the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0022] In the description of the present utility model, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] Embodiment:

[0025] As shown in the attached Figure 1 to the attached Figure 4 figure:

[0026] The present utility model provides a sound-damping device for the air inlet of a tunnel main ventilator, including a fan body 1. The fan body 1 includes fan blades 6. A protective cover 2 is installed on one side of the fan body 1. An annular groove 3 is correspondingly opened on one side of the fan body 1. The protective cover 2 is correspondingly installed inside the annular groove 3. A plurality of fixed rods 4 are installed on one side of the protective cover 2. A plurality of through grooves 5 corresponding to the size of the fixed rods 4 are opened on one side of the inner wall of the annular groove 3. A sound-damping mechanism is arranged inside the fan body 1, and a protective component is arranged on one side of the fan body 1.

[0027] Among them, the sound insulation mechanism includes a sound-absorbing cotton 11. One side of the sound-absorbing cotton 11 is abutted with a sound insulation board 13. The outer side of the sound insulation board 13 is adapted to the inner wall of the ventilator body 1 in size. One side of the sound insulation board 13 and one side of the ventilator body 1 are jointly provided with threaded holes 15. A bolt 14 is jointly installed in the two threaded holes 15 by threading. Through the corresponding installation of the bolt 14 and the threaded hole 15, the sound insulation board 13 can be fixed to prevent the sound insulation board 13 from shaking inside and maintain the stability of the device.

[0028] Among them, the protection component includes a protection board 7. A plurality of guide blocks 9 are installed on one side of the protection board 7. A plurality of guide grooves 10 corresponding to the guide blocks 9 in size are opened on both sides of the bottom side of the ventilator body 1. A plurality of installation holes 19 corresponding to the fixing rods 4 in size are opened on the end side of the protection board 7. The plurality of installation holes 19 and the plurality of through grooves 5 are on the same central axis. Through the combined use of the protection cover 2, the annular groove 3, the fixing rods 4, the through grooves 5, and the protection board 7, the sound-absorbing cotton 11 can be quickly disassembled or replaced to facilitate the maintenance of the staff. With this setting, the staff only needs to open the protection cover 2, and the protection board 7 will lose its restriction, then the sound-absorbing cotton 11 can be taken out. It is not necessary to disassemble the fan blades 6 or the whole device to complete the subsequent replacement work, reducing the labor intensity of the staff. This setting is simple and easy to use and is easy to implement.

[0029] Among them, a shock-absorbing ring 18 is installed on one side of the fan blade 6. The outer side of the shock-absorbing ring 18 is fitted with the inner wall of the ventilator body 1. One side of the shock-absorbing ring 18 is abutted with one side of the sound-absorbing cotton 11. The shock-absorbing ring 18 is made of EVA material. The EVA material has excellent shock-absorbing performance, lightness, stability, and good coloring property. Installing the shock-absorbing ring 18 here can reduce the vibration generated by the fan blade 6 during operation.

[0030] Among them, a plurality of sound-absorbing holes 12 are opened on one side of the sound-absorbing cotton 11 and the sound insulation board 13. The sound-absorbing holes 12 can form a sound pressure difference inside and outside the holes, thereby generating vibration at the hole edges. Eventually, the sound wave energy is converted into mechanical energy and dissipated, achieving the purpose of sound insulation. While the sound-absorbing holes 12 play a role in sound insulation, each hole occupies a certain area, which can reduce the cost of materials used to a certain extent and is more convenient to manufacture.

[0031] Among them, a dust-proof net 17 is provided on one side of the protection cover 2. The dust-proof net 17 can filter out some dust or sundries, extend the service life of the device, and ensure the cleanliness inside the device. The plurality of fixing rods 4 are in interference fit with the corresponding through grooves 5 and installation holes 19 respectively. Through this plurality of interference fit methods, it can be ensured that the protection cover 2 can maintain relative stability after installation, avoid falling off, and facilitate the subsequent disassembly work of the staff.

[0032] Among them, two handles 8 are installed at the bottom of the protection plate 7. Through the arrangement of the handles 8, it is convenient for the staff to grasp. Above the ventilator body 1, a fixing frame 16 is installed. Through the arrangement of the fixing frame 16, it is convenient for the staff to fix or install the device in the tunnel.

[0033] The working principle of this embodiment is as follows: First, when it is necessary to replace or disassemble the sound-absorbing cotton 11, the staff grabs both sides of the protection cover 2 with both hands and pulls the protection cover 2 out of the inner part of the annular groove 3 forcefully. When the protection cover 2 is pulled out, multiple fixing rods 4 are synchronously taken out from the mounting holes 19 on one side of the protection plate 7. In this way, the protection plate 7 can be taken off, and at this time, the sound-absorbing cotton 11 can be taken out, so as to carry out the replacement work.

[0034] Secondly, by turning the bolt 14 and taking the bolt 14 out of the threaded hole 15, the sound insulation board 13 inside can be replaced. This setting is easy to implement and convenient to operate.

[0035] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles of the present invention and its practical application, and to enable those of ordinary skill in the art to understand the present invention so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. A silencing device for the air inlet of a tunnel main ventilator, comprising a ventilator body (1), characterized in that: The fan body (1) includes fan blades (6). A protective cover (2) is installed on one side of the fan body (1). An annular groove (3) is correspondingly formed on one side of the fan body (1). The protective cover (2) is correspondingly installed inside the annular groove (3). A plurality of fixing rods (4) are installed on one side of the protective cover (2). A plurality of through grooves (5) corresponding to the size of the fixing rods (4) are formed on one side of the inner wall of the annular groove (3). A sound-absorbing mechanism is arranged inside the fan body (1), and a protective component is arranged on one side of the fan body (1).

2. The silencing device for the air inlet of the main tunnel ventilator according to claim 1, characterized in that: The sound-absorbing mechanism includes a sound-absorbing cotton (11). A sound-insulating board (13) is abutted against one side of the sound-absorbing cotton (11). The outer side of the sound-insulating board (13) is adapted to the inner wall of the fan body (1) in size. A threaded hole (15) is jointly formed on one side of the sound-insulating board (13) and one side of the fan body (1). A bolt (14) is jointly installed by threading inside the two threaded holes (15).

3. The silencing device for the air inlet of the main tunnel ventilator according to claim 1, wherein: The protective component includes a protective board (7). A plurality of guiding blocks (9) are installed on one side of the protective board (7). A plurality of guiding grooves (10) corresponding to the size of the guiding blocks (9) are formed on both sides of the bottom of the fan body (1). A plurality of mounting holes (19) corresponding to the size of the fixing rods (4) are formed on the end side of the protective board (7). The plurality of mounting holes (19) and the plurality of through grooves (5) are on the same central axis.

4. The silencing device for the air inlet of the main tunnel ventilator according to claim 1, wherein: A shock-absorbing ring (18) is installed on one side of the fan blade (6). The outer side of the shock-absorbing ring (18) is fitted to the inner wall of the fan body (1). One side of the shock-absorbing ring (18) is abutted against one side of the sound-absorbing cotton (11). The shock-absorbing ring (18) is made of EVA material.

5. The silencing device for the air inlet of the main tunnel ventilator according to claim 4, characterized in that: A plurality of sound-absorbing holes (12) are formed on one side of both the sound-absorbing cotton (11) and the sound-insulating board (13).

6. The silencing device for the air inlet of the main tunnel ventilator according to claim 1, wherein: A dust-proof net (17) is arranged on one side of the protective cover (2). The plurality of fixing rods (4) are in interference fit with the corresponding through grooves (5) and mounting holes (19) respectively.

7. The silencing device for the air inlet of the main tunnel ventilator according to claim 3, characterized in that: Two handles (8) are installed at the bottom of the protective board (7). A fixing frame (16) is installed above the fan body (1).

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