A noise isolation device for a fan of a thermal power plant

Abstract

The utility model discloses a kind of noise isolation devices for thermal power plant fan, belong to fan noise reduction technical field, including bottom plate and soundproof cover, the soundproof cover cover is equipped in the top surface of the bottom plate, and with the bottom plate is enclosed to form the soundproof room for installing thermal power plant fan, one side of the soundproof cover is equipped with air inlet fan, the other side is equipped with air outlet pipe, air inlet is opened on the rear wall of soundproof cover, and breathable hole is also opened on the top wall of soundproof cover;The noise isolation device for thermal power plant fan multilayer noise reduction system, high efficiency blocks fan noise propagation, solves the heat accumulation problem of traditional soundproof cover, prolongs fan service life and ensures continuous and stable power generation of thermal power plant.

Description

Technical Field

[0001] This utility model specifically relates to a noise isolation device for fans in thermal power plants, belonging to the field of fan noise reduction technology. Background Technology

[0002] As a key auxiliary equipment in the power generation process, thermal power plant fans are widely used in core aspects such as boiler ventilation, flue gas emission, and air preheating. Their stable operation directly affects the power generation efficiency and safe production of thermal power plants. However, during high-speed operation, the impeller rotation, airflow disturbance, and mechanical vibration of the fans generate high-intensity noise. This noise not only causes serious pollution to the surrounding environment of the plant, but also endangers the physical and mental health of on-site operators, and may interfere with the normal operation of nearby precision instruments and equipment.

[0003] To address the noise problem of wind turbines, existing technologies commonly employ soundproof enclosures to completely cover the turbine for noise isolation. These enclosures are typically made of high-density sound-absorbing materials, achieving noise reduction by blocking the noise propagation path. However, in practical applications, due to the strong airtightness of the enclosures, the large amount of heat generated during wind turbine operation cannot be dissipated in time, leading to rapid heat accumulation inside the enclosure.

[0004] Heat buildup can cause a series of problems: on the one hand, excessively high temperatures can accelerate the aging and wear of key components such as bearings and motors inside the fan, reduce the service life of the equipment, and increase maintenance costs; on the other hand, heat buildup can also lead to a decrease in the operating efficiency of the fan, and may even cause it to shut down due to overheating triggering the equipment protection mechanism, affecting the continuous and stable operation of the thermal power plant. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a noise isolation device for fans in thermal power plants.

[0006] A noise isolation device for a thermal power plant fan includes a base plate and a soundproof cover. The soundproof cover is installed on the top surface of the base plate and together with the base plate forms a soundproof chamber for installing the thermal power plant fan. An air inlet fan is installed on one side of the soundproof cover, and an air outlet pipe is installed on the other side. An air inlet is opened on the rear side wall of the soundproof cover, and a ventilation hole is also opened on the top wall of the soundproof cover.

[0007] Furthermore, the soundproof enclosure includes a left enclosure and a right enclosure, with the right edge of the left enclosure abutting the left edge of the right enclosure, and both the inner walls of the left and right enclosures are provided with metal mesh panels.

[0008] Furthermore, it also includes a locking member set on the base plate for locking the left cover and the right cover to the base plate. The locking member includes a fixing plate installed on the top surface of the base plate. The outer surface of the fixing plate is connected with a male buckle. The outer walls of the left cover and the right cover are each provided with a female buckle that mates with the male buckle.

[0009] Furthermore, the intake fan is mounted on the left cover, and a baffle is also installed on the inner wall of the left cover, with the baffle located directly in front of the intake fan.

[0010] Furthermore, the exhaust pipe is installed on the right cover, and one end of the exhaust pipe extending into the soundproof room is connected to a flexible connecting cover that connects to the exhaust end of the power plant fan.

[0011] Furthermore, the inner walls of the left and right covers are spaced apart from the corresponding metal mesh plates to form sound insulation cavities. The sound insulation cavities are filled with a layer of sound-absorbing cotton and a layer of sound-insulating felt, and the sound-absorbing cotton and the sound-insulating felt together fill the sound insulation cavities.

[0012] Furthermore, a sound-absorbing bowl is installed inside the vent hole. The sound-absorbing bowl has a frustum-shaped structure with open top and bottom, and airflow buffer holes are opened on the wall surface of the sound-absorbing bowl.

[0013] Furthermore, positioning holes are provided on the base plate, which are distributed at the four corners of the base plate and penetrate along the thickness of the base plate.

[0014] Beneficial effects:

[0015] 1. This utility model, through a multi-layer noise reduction system, effectively blocks the transmission of fan noise by using a closed soundproof chamber enclosed by the left and right covers, a composite noise reduction structure of sound-absorbing cotton and sound-insulating felt inside the soundproof cavity, and an auxiliary noise reduction design of the sound-absorbing bowl inside the vent.

[0016] 2. This utility model constructs an efficient heat dissipation cycle through the coordinated design of forced air intake fan, airflow guidance baffle, and heat dissipation assistance vents, solving the problem of heat accumulation in traditional soundproof covers; ensuring smooth heat dissipation, extending the service life of the fan, and ensuring continuous and stable power generation in thermal power plants. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the left-side structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the right-side structure of this utility model;

[0019] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 4 for Figure 3Enlarged view of the structure at point A in the middle;

[0021] Figure 5 This is a schematic diagram of the structure of the base plate in this utility model.

[0022] In the diagram: 1. Base plate; 2. Left enclosure; 3. Right enclosure; 4. Metal mesh plate; 5. Sound-absorbing cotton; 6. Sound insulation felt; 7. Ventilation hole; 8. Inlet fan; 9. Baffle; 10. Exit pipe; 11. Flexible connecting cover; 12. Fixing plate; 13. Male buckle; 14. Female buckle; 15. Positioning hole; 16. Silencing bowl; 17. Airflow buffer hole; 18. Air inlet. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 As shown, a noise isolation device for a thermal power plant fan includes a base plate 1 and a soundproof cover. The soundproof cover is placed on the top surface of the base plate 1 and forms a soundproof chamber for installing the thermal power plant fan. An inlet fan 8 is installed on one side of the soundproof cover, and an outlet pipe 10 is installed on the other side. An air inlet 18 is opened on the rear side wall of the soundproof cover, and a ventilation hole 7 is also opened on the top wall of the soundproof cover.

[0025] Specifically, the base plate 1 serves as the foundation for the installation of the device. The soundproof cover is placed on the top surface of the base plate 1 and encloses it to form a soundproof room. The power plant fan is installed in the soundproof room. The air inlet 18 provides an external air extraction channel for the operation of the fan, ensuring the normal air intake requirements of the fan. The air generated by the operation of the fan is introduced into the air outlet pipe 10 through the flexible connecting cover 11 and then transported outward through the air outlet pipe 10. The air intake fan 8 on the left cover 2 forces air into the soundproof room, and the ventilation holes 7 on the top wall assist in the discharge of hot air from the room, forming a complete working process. At the same time, the soundproof cover blocks the outward transmission of fan noise.

[0026] It should be noted that the air inlet 18 is equipped with a dust filter to prevent external dust from entering the soundproof enclosure.

[0027] As a technical optimization of this utility model, the soundproof cover includes a left cover 2 and a right cover 3. The right edge of the left cover 2 is connected to the left edge of the right cover 3. The inner walls of both the left cover 2 and the right cover 3 are provided with metal mesh plates 4.

[0028] Specifically, the soundproof enclosure is designed as a left enclosure 2 and a right enclosure 3, which are joined together at their edges to form a closed enclosure. The inner walls of both the left enclosure 2 and the right enclosure 3 are provided with metal mesh plates 4, which provide structural support for the subsequent formation of the soundproof cavity and the installation of soundproof materials.

[0029] As a technical optimization of this utility model, it also includes a locking member set on the base plate 1 for locking the left cover 2 and the right cover 3 to the base plate 1. The locking member includes a fixing plate 12 installed on the top surface of the base plate 1. A male buckle 13 is connected to the outer surface of the fixing plate 12. A female buckle 14 that cooperates with the male buckle 13 is provided on the outer wall of both the left cover 2 and the right cover 3.

[0030] Specifically, the fixing plate 12 on the top surface of the base plate 1 is provided with a male buckle 13, and the female buckle 14 on the outer wall of the left cover 2 and the right cover 3 engages with the male buckle 13 to lock and fix the left cover 2, the right cover 3 and the base plate 1, and ensure the airtightness of the connection between the soundproof cover and the base plate 1.

[0031] As a technical optimization of this utility model, the inlet fan 8 is set on the left cover 2, and a baffle 9 is also installed on the inner wall of the left cover 2, with the baffle 9 located directly in front of the inlet fan 8.

[0032] Specifically, the intake fan 8 on the left cover 2 forces air into the soundproof room. The baffle 9 on the inner wall of the left cover 2 is located directly in front of the intake fan 8, which guides and diverts the incoming airflow, allowing the cold air to diffuse evenly into the soundproof room and fully exchange heat with the heating fan. At the same time, the baffle 9 blocks the path of the mechanical noise of the thermal power plant fan from propagating to the outside of the intake fan 8.

[0033] As a technical optimization of this utility model, the air outlet pipe 10 is installed on the right cover 3, and one end of the air outlet pipe 10 extending into the soundproof room is connected to a flexible connecting cover 11 that connects to the air outlet of the thermal power plant fan.

[0034] Specifically, the exhaust pipe 10 is fixedly installed on the right cover 3, and its end extending into the soundproof room is sealed to the exhaust end of the power plant fan through the flexible connecting cover 11. When the fan is running, it draws in outside air through the air inlet 18 to supply its own operation. The airflow generated is discharged through the exhaust end of the fan and guided into the exhaust pipe 10 by the flexible connecting cover 11, and finally transported outward in a directional manner through the exhaust pipe 10. At the same time, the flexible connecting cover 11 can adapt to the vibration generated by the operation of the fan and buffer the vibration transmission.

[0035] As a technical optimization of this utility model, the inner walls of the left cover 2 and the right cover 3 are respectively spaced with the corresponding side metal mesh plate 4 to form a sound insulation cavity. The sound insulation cavity is filled with a layer of sound-absorbing cotton 5 and a layer of sound insulation felt 6. The sound-absorbing cotton 5 and the sound insulation felt 6 together fill the sound insulation cavity.

[0036] Specifically, a sound insulation cavity is formed between the inner walls of the left cover 2 and the right cover 3 and the corresponding side metal mesh plate 4. The sound-absorbing cotton 5 and the sound insulation felt 6 filled in the sound insulation cavity form a composite noise reduction structure: the sound-absorbing cotton 5 absorbs and attenuates the noise energy of the fan, the sound insulation felt 6 blocks the unabsorbed noise from penetrating the cover, and the metal mesh plate 4 plays a role in limiting and fixing the filling material.

[0037] As a technical optimization of this utility model, a sound-absorbing bowl 16 is also installed inside the vent 7. The sound-absorbing bowl 16 has a frustum-shaped structure with open top and bottom, and an airflow buffer hole 17 is opened on the wall of the sound-absorbing bowl 16.

[0038] Specifically, the vent 7 is used to exhaust hot airflow in the soundproof room. The wall of the frustum-shaped sound-absorbing bowl 16 installed inside it has an airflow buffer hole 17. When the hot airflow passes through the vent 7, the sound-absorbing bowl 16 buffers and attenuates the noise in the airflow. The airflow buffer hole 17 achieves a balance between airflow and noise attenuation.

[0039] As a technical optimization of this utility model, a positioning hole 15 is provided on the base plate 1. The positioning hole 15 is distributed at the four corners of the base plate 1 and penetrates along the thickness of the base plate 1.

[0040] Specifically, the positioning holes 15 at the four corners of the base plate 1 penetrate along the thickness of the base plate 1. The device can be fixed in the designated installation position through the positioning holes 15 to ensure the accuracy and stability of the device installation.

[0041] The working principle of the noise isolation device for the fan in this thermal power plant, combined with the functions of its various structural components, is as follows:

[0042] First, the entire device is fixed in the designated installation position through the positioning holes 15 at the four corners of the base plate 1 to ensure the stability of the device when the fan is running. The soundproof cover is composed of the left cover 2 and the right cover 3 connected together. It is fixed to the base plate 1 by locking parts: the male buckle 13 on the fixing plate 12 on the top surface of the base plate 1 cooperates with the female buckle 14 on the outer wall of the left cover 2 and the right cover 3 to lock the left cover 2 and the right cover 3 tightly to the top surface of the base plate 1, together forming a closed soundproof room to provide a sealed soundproof space for the fan.

[0043] The closed enclosure formed by the docking of the left enclosure 2 and the right enclosure 3 constitutes the first noise propagation barrier, blocking the direct diffusion of noise generated by the operation of the fan to the outside. The sound insulation cavity formed between the inner wall of the left enclosure 2 and the right enclosure 3 and the corresponding side metal mesh plate 4 achieves secondary noise reduction through the sound-absorbing cotton 5 and sound insulation felt 6 filled inside: the sound-absorbing cotton 5 absorbs and attenuates the fan noise, and the sound insulation felt 6 further blocks the unabsorbed noise from penetrating the enclosure. The metal mesh plate 4 not only limits and fixes the sound-absorbing cotton 5 and the sound insulation felt 6, but also optimizes the sound wave propagation path and improves the acoustic treatment effect.

[0044] The frustum-shaped sound-absorbing bowl 16 inside the top wall vent 7 has airflow buffer holes 17 on its wall surface. While ensuring airflow, it buffers and attenuates the noise transmitted through the vent 7, thus avoiding secondary noise leakage during heat dissipation and ventilation.

[0045] After the intake fan 8 installed on the left cover 2 is started, it forces air into the soundproof room. The baffle 9 on the inner wall of the left cover 2 is located directly in front of the intake fan 8. There is a gap between the baffle 9 and the inner wall of the soundproof cover for air circulation. The baffle 9 blocks the path of mechanical noise from the operation of the thermal power plant fan to the outside of the intake fan 8. The hot air generated by the operation of the fan is discharged through the vent 7 on the top wall, effectively preventing heat accumulation in the soundproof room.

[0046] The flexible connecting cover 11 and the air outlet pipe 10 can transport the air generated by the operation of the thermal power plant fan to the outside, while the air inlet 18 allows the thermal power plant fan to draw in outside air when it is running.

[0047] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A noise isolation device for a thermal power plant fan, characterized in that: Includes a base plate (1) and a soundproof cover. The soundproof cover is placed on the top surface of the base plate (1) and together with the base plate (1) forms a soundproof room for installing a thermal power plant fan. An air inlet fan (8) is installed on one side of the soundproof cover and an air outlet pipe (10) is installed on the other side. An air inlet (18) is opened on the rear side wall of the soundproof cover, and a ventilation hole (7) is also opened on the top wall of the soundproof cover.

2. The noise isolation device for thermal power plant fans as described in claim 1, characterized in that: The soundproof enclosure includes a left enclosure (2) and a right enclosure (3). The right edge of the left enclosure (2) is connected to the left edge of the right enclosure (3). The inner walls of the left enclosure (2) and the right enclosure (3) are provided with metal mesh plates (4).

3. The noise isolation device for thermal power plant fans as described in claim 2, characterized in that: It also includes a locking member set on the base plate (1) for locking the left cover (2) and the right cover (3) to the base plate (1). The locking member includes a fixing plate (12) installed on the top surface of the base plate (1). The outer surface of the fixing plate (12) is connected with a male buckle (13). The outer walls of the left cover (2) and the right cover (3) are both provided with female buckles (14) that cooperate with the male buckle (13).

4. The noise isolation device for thermal power plant fans as described in claim 2, characterized in that: The intake fan (8) is mounted on the left cover (2), and a baffle (9) is also installed on the inner wall of the left cover (2). The baffle (9) is located directly in front of the intake fan (8).

5. The noise isolation device for thermal power plant fans as described in claim 2, characterized in that: The air outlet pipe (10) is installed on the right cover (3), and one end of the air outlet pipe (10) extending into the soundproof room is connected to a flexible connecting cover (11) that connects to the air outlet of the thermal power plant fan.

6. The noise isolation device for thermal power plant fans as described in claim 2, characterized in that: The inner walls of the left cover (2) and the right cover (3) are spaced apart from the corresponding side metal mesh plate (4) to form a sound insulation cavity. The sound insulation cavity is filled with a layer of sound-absorbing cotton (5) and a layer of sound insulation felt (6). The sound-absorbing cotton (5) and the sound insulation felt (6) together fill the sound insulation cavity.

7. The noise isolation device for thermal power plant fans as described in claim 1, characterized in that: The vent (7) is also equipped with a sound-absorbing bowl (16), which is a frustum-shaped structure with an open top and bottom. An airflow buffer hole (17) is provided on the wall of the sound-absorbing bowl (16).

8. The noise isolation device for thermal power plant fans as described in claim 1, characterized in that: The base plate (1) is provided with positioning holes (15), which are distributed at the four corners of the base plate (1) and penetrate along the thickness of the base plate (1).

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