Cooling tower fan for power station

Abstract

The utility model discloses a cooling tower fan for a power station, and relates to the technical field of cooling tower fans, the cooling tower fan comprises a tower body and blades arranged in the tower body, the blades are provided with inner grooves, the inner grooves are T-shaped, the blades are also provided with lining plates, one ends of the lining plates close to the blades are connected with fixing rods, and the fixing rods are fixedly connected with the tower body. A rotating plate is rotationally connected to the outer wall of the fixing rod, a compression spring is connected between the rotating plate and the fixing rod, one end of the rotating plate abuts against the interior of the inner groove, and a disassembling assembly is further arranged in the inner groove. The blade edges of the blades are protected, so that the service life of the blades is prolonged, and the replacement frequency of the blades is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cooling tower fan technology, specifically a cooling tower fan for power plants. Background Technology

[0002] The power plant cooling tower is the core equipment of the thermal circulation system. Its function is to drive airflow through a fan to achieve heat exchange between circulating water and air, thereby reducing the water temperature and ensuring the efficient operation of the generator set.

[0003] For example, an existing patent (publication number: CN220791546U) discloses an energy-saving cooling tower fan, including a cooling tower body and a fan disc. The top of the cooling tower body is provided with a mounting frame, and the mounting frame is provided with a mounting platform in the middle. The mounting platform is coaxially arranged with the cooling tower body. A permanent magnet drive motor is fixedly mounted on the mounting platform through a motor bracket. The output end of the permanent magnet drive motor is coaxially fixedly connected to a rotating shaft through a coupling. The end of the rotating shaft away from the permanent magnet drive motor is coaxially fixedly connected to a rotating mechanism.

[0004] However, the above-mentioned energy-saving cooling tower fan design still has some drawbacks in actual use: the area where the cooling tower fan is located is often dusty, which can easily cause wear on the fan blades during operation. The above device connects the blades with the mounting rod, making it easy for workers to replace individual blades after they are damaged. Although this reduces resource consumption to some extent, the device does not have any protective structures. In harsh environments, such as deserts, Gobi, and arid and semi-arid regions, dust particles constantly erode the leading edge of the blades, causing surface wear. This requires frequent blade inspection and replacement, which can lead to accumulated wear due to frequent disassembly and increases the workload of workers.

[0005] To address these issues, we designed a cooling tower fan for power plants. Utility Model Content

[0006] The purpose of this utility model is to provide a cooling tower fan for power plants to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model provides a cooling tower fan for power plants, including a tower body and blades disposed inside the tower body. The blades have an inner groove, which is T-shaped. A liner is also disposed on the blades. A fixing rod is connected to one end of the liner near the blade. A rotating plate is rotatably connected to the outer wall of the fixing rod. A compression spring is connected between the rotating plate and the fixing rod. One end of the rotating plate abuts against the inner groove. A disassembly assembly is also disposed inside the inner groove.

[0008] Furthermore, a drive motor is bolted to the inner bottom wall of the tower body, and the drive end of the drive motor is connected to a connecting column. The blades are arranged around the outer wall of the connecting column, and the blades are provided with helical ribs. The shape of the helical ribs is adapted to the shape of the blades.

[0009] Furthermore, the disassembly assembly includes a pressure rod, one end of which is connected to a pressure plate, the pressure plate being slidably disposed within the inner groove, and the other end of the pressure rod penetrating the outer wall of the blade and connected to a pressing plate.

[0010] Furthermore, a column is rotatably connected to the drive end of the drive motor, the connecting column is mounted on the column, an extension plate is connected to the outer wall of the column, and a protective component is provided at the other end of the extension plate.

[0011] Furthermore, the protective assembly includes an upper protective plate, a connecting rod connected to the bottom surface of the upper protective plate, a lower protective rod connected to the other end of the connecting rod, and the outer wall of the lower protective rod connected to the outer wall of the extension plate.

[0012] Furthermore, a gap is provided between the upper protective plate and the lower protective rod.

[0013] Furthermore, the fixed rod is tapered.

[0014] Furthermore, the liner is arc-shaped to match the leading edge of the blade, and the surface of the blade is provided with a wear-resistant coating.

[0015] The beneficial effects of this utility model are: the fixed rod drives the rotating plate closer to the inner groove. When the rotating plate enters the inner groove, the compression spring between the rotating plate and the fixed rod is compressed until the rotating plate is completely inside the inner groove. The compression spring is restored to its initial state through the transverse groove in the inner groove, causing the tail end of the rotating plate to open again and tightly abut against the inner wall of the inner groove, so that the liner is engaged in the inner groove, protecting the blade edge, improving the service life of the blade, and reducing the number of times the blade is replaced.

[0016] The beneficial effects of this utility model are: when the drive motor is started, the blades are rotated. When the blades rotate, centrifugal force is generated. The dust adhering to the surface of the blades will be affected by the centrifugal force and guided by the spiral ribs. It will move along the trajectory of the spiral ribs towards the edge of the blades until it is thrown off the surface of the blades. This effectively reduces the adhesion and accumulation of dust on the surface of the blades, further improves the service life of the blades, and reduces the number of times the blades need to be replaced. Attached Figure Description

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

[0018] Figure 2This is a schematic diagram of the blade structure in this utility model;

[0019] Figure 3 This is a schematic diagram of the spiral rib structure in this utility model;

[0020] Figure 4 This is a schematic diagram of the inner groove in the blade of this utility model.

[0021] In the diagram: 1. Tower body; 2. Drive motor; 3. Connecting column; 4. Blade; 401. Spiral rib; 402. Inner groove; 5. Liner; 6. Upper protective plate; 7. Connecting rod; 8. Lower protective rod; 9. Fixing rod; 10. Rotating plate; 11. Compression spring; 12. Pressure rod; 13. Pressure plate; 14. Extension plate. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-4 This utility model provides a technical solution: a cooling tower fan for a power station, including a tower body 1 and blades 4 disposed inside the tower body 1. The blades 4 have an inner groove 402, which is T-shaped. A liner 5 is also disposed on the blades 4. The liner 5 is arc-shaped and matches the leading edge of the blades 4. The surface of the blades 4 is coated with a wear-resistant coating, which is tungsten carbide, to improve the impact and wear resistance of the blades 4. A fixing rod 9 is connected to one end of the liner 5 near the blades 4. The fixing rod 9 is conical in shape. A rotating plate 10 is rotatably connected to the outer wall of the fixing rod 9 via a rotating shaft. A compression spring 11 is connected between the rotating plate 10 and the fixing rod 9. One end of the rotating plate 10 abuts against the inner groove 402. When the fixing rod 9 is inserted into the inner groove 402, one end of it abuts against the inner groove 402, forming a mechanical lock to prevent the liner 5 from loosening or falling off during the operation of the fan. A disassembly assembly is also provided inside the inner groove 402.

[0024] The disassembly assembly includes a pressure rod 12, one end of which is connected to a pressure plate 13. The pressure plate 13 is slidably disposed in the inner groove 402. The other end of the pressure rod 12 passes through the outer wall of the blade 4 and is connected to a pressing plate. Pushing the pressure plate 13 causes the rotating plate 10 to overcome the elastic force of the compression spring 11 and disengage from the abutting position of the inner groove 402. Then, the fixing rod 9 is pulled out from the inner groove 402, and the worn liner 5 can be removed.

[0025] It should be noted that a limiting groove is provided in the inner groove 402, and a limiting block is connected to the pressure rod 12. The limiting block is slidably connected in the limiting groove to guide and limit the pressure plate 13, while improving the stability of the pressure plate 13 during operation.

[0026] In practice, the fixed rod 9 drives the rotating plate 10 close to the inner groove 402. Since the rotating plate 10 and the fixed rod 9 are rotatably connected, when the rotating plate 10 enters the inner groove 402, the compression spring 11 between the rotating plate 10 and the fixed rod 9 is compressed until the rotating plate 10 is fully inside the inner groove 402. When it passes through the transverse groove in the inner groove 402, the compression spring 11 returns to its initial state, causing the tail end of the rotating plate 10 to open again. The tail end is tightly pressed against the inner wall of the inner groove 402, so that the liner 5 is engaged in the inner groove 402, protecting the blade edge of the blade 4, improving the service life of the blade 4, and reducing the number of times the blade 4 needs to be replaced.

[0027] See Figure 2 as well as Figure 3 As shown, a drive motor 2 is bolted to the inner bottom wall of the tower body 1. A connecting column 3 is connected to the drive end of the drive motor 2. Blades 4 are arranged around the outer wall of the connecting column 3. When the drive motor 2 is started, its output shaft drives the connecting column 3 to rotate via a flexible coupling. The connecting column 3 then drives the blades 4 to rotate synchronously. Spiral ribs 401 are provided on the blades 4. The spiral ribs 401 are integrally molded with the blade 4 substrate to ensure the connection strength between the ribs and the blades 4. The shape of the spiral ribs 401 matches the shape of the blades 4. During operation, when dust adheres to the surface of the blades 4, the centrifugal force generated by the rotation of the blades 4 causes the dust to be subjected to an outward force. Simultaneously, the spiral ribs 401 guide the dust, causing it to move along the spiral trajectory of the spiral ribs 401 towards the edge of the blades 4. This reduces dust erosion and wear on the blades 4, lowers the risk of damage due to dust accumulation, significantly extends the service life of the blades 4, reduces the frequency of blade replacement, and lowers equipment maintenance costs.

[0028] In specific implementation, a spiral rib 401 is provided on the surface of the blade 4. The shape of the spiral rib 401 is adapted to the shape of the blade 4. The drive motor 2 is started to drive the blade 4 to rotate. When the blade 4 rotates, centrifugal force is generated. During the operation of the device, the dust adhering to the surface of the blade 4 will be affected by the centrifugal force and guided by the spiral rib 401. It will move along the trajectory of the spiral rib 401 towards the edge of the blade 4 until it is thrown off the surface of the blade 4. This effectively reduces the adhesion and accumulation of dust on the surface of the blade 4, further improves the service life of the blade 4, and reduces the number of times the blade 4 is replaced.

[0029] See Figure 2A column is rotatably connected to the drive end of the drive motor 2, and a connecting column 3 is installed on the column. An extension plate 14 is connected to the outer wall of the column. When the column rotates with the drive end of the drive motor 2, it will drive the connecting column 3 to rotate synchronously, while the column remains stationary. A protective component is provided at the other end of the extension plate 14.

[0030] The protective assembly includes an upper protective plate 6, with a connecting rod 7 connected to the bottom surface of the upper protective plate 6. A protective net is installed on the outer wall of the upper protective plate 6, positioned directly above the blade 4 to intercept falling foreign objects and protect the blade 4 from damage. The other end of the connecting rod 7 is connected to a lower protective rod 8. The protective assemblies are connected by bolts. The outer wall of the lower protective rod 8 is connected to the outer wall of the extension plate 14. A gap is provided between the upper protective plate 6 and the lower protective rod 8, allowing operators to observe the operating status of the root of the blade 4 from the outside and to check whether the bolts at the root of the blade 4 are loose or whether the liner 5 is worn.

[0031] Working Principle: Due to the long-term erosion of the leading edge of blade 4 by sand and dust particles, surface wear is easily caused. A liner 5 is installed on the leading edge of blade 4. The liner 5 is positioned so that the fixing rod 9 drives the rotating plate 10 closer to the inner groove 402. Because of the rotatable connection between the rotating plate 10 and the fixing rod 9, when the rotating plate 10 enters the inner groove 402, the compression spring 11 between the rotating plate 10 and the fixing rod 9 is compressed until the rotating plate 10 is fully inside the inner groove 402. As it passes through the transverse groove in the inner groove 402, the compression spring 11 returns to its initial state, causing the tail end of the rotating plate 10 to reopen and tightly abut against the inner wall of the inner groove 402, thus locking the liner 5 within the inner groove 402. This provides protection for the blade 4. The blade edge is protected to improve the service life of the blade 4 and reduce the number of times the blade 4 needs to be replaced. The surface of the blade 4 is provided with spiral ribs 401, the shape of which is adapted to the shape of the blade 4. When the drive motor 2 is started, the blade 4 is rotated. When the blade 4 rotates, centrifugal force is generated. During the operation of the device, the dust adhering to the surface of the blade 4 will be affected by the centrifugal force and guided by the spiral ribs 401. It will move along the trajectory of the spiral ribs 401 towards the edge of the blade 4 until it is thrown off the surface of the blade 4. This effectively reduces the adhesion and accumulation of dust on the surface of the blade 4, further improving the service life of the blade 4 and reducing the number of times the blade 4 needs to be replaced.

[0032] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A cooling tower fan for power plants, comprising a tower body (1) and blades (4) arranged inside the tower body (1), characterized in that, The blade (4) is provided with an inner groove (402), which is in the shape of "T", and a lining plate (5) is arranged on the blade (4), one end of the lining plate (5) is connected with a fixing rod (9), a rotating plate (10) is rotatably connected to the outer wall of the fixing rod (9), a compression spring (11) is connected between the rotating plate (10) and the fixing rod (9), one end of the rotating plate (10) abuts against the inner groove (402), and a dismounting assembly is further arranged in the inner groove (402).

2. A cooling tower fan for power stations as claimed in claim 1 wherein: The inner bottom wall of the tower body (1) is provided with a driving motor (2) through bolts, the driving end of the driving motor (2) is connected with a connecting column (3), the blade (4) is arranged around the outer wall of the connecting column (3), and the blade (4) is provided with a spiral rib (401), the shape of the spiral rib (401) is matched with the shape of the blade (4).

3. A cooling tower fan for power stations as claimed in claim 2 wherein: The dismounting assembly comprises a pressing rod (12), one end of the pressing rod (12) is connected with a pressing plate (13), the pressing plate (13) is slidably arranged in the inner groove (402), and the other end of the pressing rod (12) penetrates through the outer wall of the blade (4) and is connected with a pressing plate.

4. A cooling tower fan for power stations as claimed in claim 3 wherein: The driving end of the driving motor (2) is rotatably connected with a stand column, the connecting column (3) is mounted on the stand column, the outer wall of the stand column is connected with an extension plate (14), and the other end of the extension plate (14) is provided with a protection assembly.

5. A cooling tower fan for power stations as claimed in claim 4 wherein: The protection assembly comprises an upper protection plate (6), the bottom surface of the upper protection plate (6) is connected with a connecting rod (7), the other end of the connecting rod (7) is connected with a lower protection rod (8), and the outer wall of the lower protection rod (8) is connected with the outer wall of the extension plate (14).

6. A cooling tower fan for power stations as claimed in claim 5 wherein: A gap is arranged between the upper protection plate (6) and the lower protection rod (8).

7. A cooling tower fan for power stations as claimed in claim 6 wherein: The shape of the fixing rod (9) is conical.

8. A cooling tower fan for power stations as claimed in claim 7 wherein: The shape of the lining plate (5) is arc-shaped, matched with the leading edge of the blade (4), and the surface of the blade (4) is provided with a wear-resistant coating.

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