Centrifugal fan for cooling tower

Abstract

The invention discloses a centrifugal fan for a cooling tower, and belongs to the technical field of fan equipment, the centrifugal fan comprises a base, the upper end of the base is fixedly connected with a centrifugal fan body, the rear end of the centrifugal fan body is provided with a first motor, the first motor is arranged at the upper end of the base, and the first motor is used for driving the centrifugal fan body; and an air outlet pipe is arranged at the upper end of the centrifugal fan body. Dust is filtered through the arranged filter screen, when the filter screen is cleaned, air flow on one side of the shell can be blocked through the flow separation plate, then the filter screen is cleaned through the cleaning assembly, and therefore during cleaning, dust cannot be subjected to the effect of the air flow and cannot be strongly attached to the upper end of the filter screen, and the dust removal effect is improved. According to the air purifier, dust can be effectively cleaned, the air inlet effect is guaranteed, the filtering assemblies are arranged on the left side and the right side, air can be fed through the other side when one side is cleaned, the machine does not need to be shut down for cleaning, and the using effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fan equipment, and more specifically, to a centrifugal fan for a cooling tower. Background Art

[0002] The cooling tower is a device that uses water as a circulating coolant to absorb heat from a system and discharge it into the atmosphere to reduce the water temperature. It uses the heat exchange between water and air to generate steam. The steam evaporates and takes away the heat to achieve evaporative heat dissipation, convection heat transfer and radiation heat transfer. It is an evaporative heat dissipation device that dissipates the waste heat generated in industry or refrigeration and air conditioning to reduce the water temperature to ensure the normal operation of the system. The device is generally barrel-shaped, so the fan in it plays a very important role;

[0003] A centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine.

[0004] The cooling tower requires a centrifugal fan to transport gas. In order to reduce the friction between the internal blades and the outer shell during operation, a filter is installed at the air inlet. As the operation progresses, the filter will be attached with a lot of dust, which will affect the air intake effect of the centrifugal fan. The cleaning components set in the existing device, when cleaning, if it is not stopped, due to the continuous operation of the air intake, the dust attached to the upper end of the filter will be affected by the airflow and have a strong adhesion to the filter. Even if it can be pushed downward, when the cleaning component is removed, the dust only changes its position and will still be on the upper end of the filter. Stopping the device for cleaning will affect the continuous operation, and its use is relatively limited.

[0005] Therefore, a centrifugal fan for a cooling tower is proposed. Summary of the invention

[0006] In view of the problems existing in the prior art, the object of the present invention is to provide a centrifugal fan for a cooling tower, which can clean dust without stopping the machine and will not be affected by airflow, thereby improving the cleaning effect.

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A centrifugal fan for a cooling tower, comprising a base, the upper end of the base being fixedly connected to a centrifugal fan body, a first motor being arranged at the rear end of the centrifugal fan body, the first motor being arranged at the upper end of the base, the first motor being used to drive the centrifugal fan body, an air outlet pipe being arranged at the upper end of the centrifugal fan body, a filter assembly being arranged at the front end of the centrifugal fan body, the filter assembly being capable of filtering dust in the air;

[0009] The filtering component includes an air inlet pipe fixedly connected to the front end of the centrifugal fan body. The front end of the air inlet pipe is fixedly connected to a housing. A partition is provided in the middle of the housing, separating the housing into two spaces on the left and right. A communication port is provided at the rear end of the housing. Filter nets are fixedly connected to both sides of the housing. Baffle plates are slidably connected to both sides of the housing. A rectangular rod is slidably connected to the inside of the lower end of the baffle plate. A circular groove is provided inside the rectangular rod. A lead screw nut is fixedly connected to the lower end inside the rectangular rod. A reciprocating lead screw is meshed and connected inside the lead screw nut. A U-shaped rod is slidably connected to the upper end of the housing. A cleaning component is provided at the lower end of the U-shaped rod. A first spring is fixedly connected to the inner wall of the upper end of the U-shaped rod, and the lower end of the first spring is fixedly connected to the upper end of the housing. A pressing plate is fixedly connected to the front end of the rectangular rod. A driving mechanism is provided at the upper end of the reciprocating lead screw.

[0010] Preferably, guide grooves are provided on the inner walls of both sides of the housing, and the baffle plates are slidably connected up and down inside the guide grooves.

[0011] Preferably, the cleaning component includes a moving block fixedly connected to the lower end of the U-shaped rod. A moving groove is provided inside the moving block. A scraping block is slidably connected inside the moving groove. Second springs are uniformly fixedly connected to the front end of the scraping block, and the front ends of the second springs are fixedly connected to the inner wall of the moving groove.

[0012] Preferably, inclined blocks are fixedly connected to both sides of the upper end of the filter net, and the upper end of the scraping block is inclined.

[0013] Preferably, the driving mechanism includes a support plate fixedly connected to the upper end of the housing. A second motor is fixedly connected to the upper end of the support plate. A rotating rod is fixedly connected to the output end of the second motor. One-way bearings are fixedly connected to the upper and lower positions of the rod wall of the rotating rod. The one-way locking directions of the two one-way bearings are opposite, and the two one-way bearings are arranged in a belt drive with the upper end of the rod wall of the reciprocating lead screw.

[0014] Preferably, a third spring is fixedly connected to the lower end of the rectangular rod, and the lower end of the third spring is fixedly connected to the inner wall of the lower end of the baffle plate.

[0015] Preferably, dirt collecting boxes are slidably connected to both sides of the lower end of the housing, and a limiting block is fixedly connected to the front end of the dirt collecting box.

[0016] Preferably, a cover plate is rotatably connected to the upper end of the dirt collecting box, and a fourth spring is fixedly connected to the lower end of the cover plate.

[0017] Preferably, the upper end of the reciprocating lead screw is rotatably connected to the support plate, and the lower end of the reciprocating lead screw is rotatably connected to the inner part of the lower end of the housing.

[0018] Preferably, a vibration block is provided at the lower end of the filter screen. A circular opening is formed inside the vibration block. First bumps are uniformly and fixedly connected to the inner wall of the circular opening. Grooves are formed on both sides of the lower end of the reciprocating lead screw. Second bumps are slidably connected inside the grooves. A fifth spring is fixedly connected to the opposite side of each of the two second bumps. The fifth spring is fixedly connected to the inner wall of the groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] (1) The filter screen is provided to filter dust. When cleaning the filter screen, the airflow on one side of the housing can be blocked by the baffle first, and then the filter screen can be cleaned by the cleaning component. In this way, during cleaning, the dust will not be affected by the airflow and will not strongly adhere to the upper end of the filter screen. Therefore, the dust can be effectively cleaned, ensuring the air intake effect. Moreover, the filter components are arranged in two on the left and right. In this way, when one side is being cleaned, the air can enter through the other side, so that the machine does not need to be shut down for cleaning, improving the use effect.

[0021] (2) Under the action of the second spring, the scraping block can fit the front end position of the filter screen, ensuring the cleaning effect. When the scraping block moves upward and contacts the inclined block, the scraping block moves forward and separates from the filter screen. In this way, during the upward movement, the dust located above the scraping block will fall under the action of the inclined setting of the scraping block, further improving the cleaning effect of the dust.

[0022] (3) When the moving block moves downward, it contacts the upper end of the cover plate. The downward movement of the moving block causes the cover plate to rotate. At this time, the dust to be cleaned enters the inside of the dirt collection box. After the cleaning is completed, the moving block moves up and down. At this time, the cover plate is no longer under the pressure of the moving block and resets under the action of the fourth spring. In this way, during normal ventilation operation, the dust inside the dirt collection box will not be affected by the airflow and will not be carried out here, further improving the cleaning effect.

[0023] (4) The reciprocating lead screw drives the second bump to move and contact the first bump. Under the action of the fifth spring, the vibration block of the device is caused to vibrate, and the vibration block transmits the vibration to the filter screen, thereby causing the filter screen to vibrate, shaking off the dust adhering to the filter screen, and further improving the dust removal effect. Description of the Drawings

[0024] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 is a schematic diagram of the first sectional structure of the present invention;

[0026] Figure 3 For the present invention Figure 2Schematic diagram of the enlarged structure at A in [the figure];

[0027] Figure 4 Schematic diagram of the partial structure of the present invention;

[0028] Figure 5 of the present invention Figure 4 Schematic diagram of the enlarged structure at B in [the figure];

[0029] Figure 6 Schematic diagram of the sectional structure of the baffle of the present invention;

[0030] Figure 7 Schematic diagram of the filter net structure of the present invention;

[0031] Figure 8 of the present invention Figure 7 Schematic diagram of the enlarged structure at C in [the figure];

[0032] Figure 9 Schematic diagram of the sectional structure of the housing of the present invention.

[0033] Explanation of the reference numerals in the figure:

[0034] 1. Base; 2. First motor; 3. Air outlet pipe; 4. Centrifugal fan body; 5. Housing; 6. Support plate; 7. Second motor; 8. Reciprocating lead screw; 9. First spring; 10. U-shaped rod; 11. Moving block; 12. Dirt accumulation box; 13. Filter screen; 14. Air inlet pipe; 15. Second spring; 16. Lead screw nut; 17. Rectangular rod; 18. Inclined block; 19. Fourth spring; 20. Limit block; 21. Cover plate; 22. Scraping block; 23. Baffle; 24. Rotating rod; 25. Belt; 26. One-way bearing; 27. Pressing plate; 28. Third spring; 29. Circular groove; 30. Vibration block; 31. Groove; 32. Fifth spring; 33. Second convex block; 34. First convex block; 35. Circular opening; 36. Guide groove; 37. Communication port. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to Figures 1 to 9, A centrifugal fan for a cooling tower, comprising a base 1. The upper end of the base 1 is fixedly connected to a centrifugal fan body 4. Under the action of a first motor 2, the centrifugal fan body 4 can generate a certain flowing air current under the action of centrifugal force. This technology is an existing technology. A first motor 2 is provided at the rear end of the centrifugal fan body 4. The first motor 2 is arranged at the upper end of the base 1 and is used to drive the centrifugal fan body 4. An air outlet pipe 3 is provided at the upper end of the centrifugal fan body 4, and the air outlet pipe 3 is used for guiding the flow. A filtering component is provided at the front end of the centrifugal fan body 4, and the filtering component can filter the dust in the air;

[0037] The filtering component includes an air inlet pipe 14 fixedly connected to the front end of the centrifugal fan body 4. The front end of the air inlet pipe 14 is fixedly connected to a housing 5. A partition is provided in the middle of the housing 5, separating the housing 5 into two left and right spaces. Gas can be introduced into the interior of the air inlet pipe 14 from both the left and right sides of the housing 5. A communication port 37 is provided at the rear end of the housing 5. Filter meshes 13 are fixedly connected to both sides of the housing 5. The filter meshes 13 can filter the dust in the air. Especially in a working environment such as a factory, it is more necessary to filter the gas in the air, thereby preventing the dust in the air from entering the interior of the centrifugal fan body 4 and affecting the rotation of the blades, and avoiding the increase of the friction force of the dust when the blades rotate, and improving the service life. Baffle plates 23 are slidably connected to both sides of the housing 5. The baffle plates 23 can move up and down relative to the housing 5. When moving to the lower end of the housing 5, the flow of the corresponding position of the air current can be blocked. A rectangular rod 17 is slidably connected to the interior of the lower end of the baffle plate 23. The rectangular rod 17 can move upward relative to the circular groove 29, and the rectangular rod 17 has a limiting effect on itself and will not rotate. A circular groove 29 is opened in the interior of the rectangular rod 17, and the circular groove 29 is used to provide a space for the reciprocating lead screw 8 to be placed. A lead screw nut 16 is fixedly connected to the lower end of the interior of the rectangular rod 17. A reciprocating lead screw 8 is meshed and connected to the interior of the lead screw nut 16. The rotation of the reciprocating lead screw 8 causes the lead screw nut 16 to move up and down. A U-shaped rod 10 is slidably connected to the upper end of the housing 5. The U-shaped rod 10 can move up and down relative to the housing 5. A cleaning component is provided at the lower end of the U-shaped rod 10. The U-shaped rod 10 drives the cleaning component to move up and down, thereby removing the sundries and dust adhering to the front end of the filter mesh 13. A first spring 9 is fixedly connected to the inner wall of the upper end of the U-shaped rod 10. The first spring 9 has an upward supporting force on the U-shaped rod 10. The lower end of the first spring 9 is fixedly connected to the upper end of the housing 5. A pressing plate 27 is fixedly connected to the front end of the rectangular rod 17. The movement of the rectangular rod 17 drives the movement of the pressing plate 27. A driving mechanism is provided at the upper end of the reciprocating lead screw 8;

[0038] When working, the first motor 2 drives the centrifugal fan body 4 to work normally. The air inlet pipe 14 introduces gas into the interior of the centrifugal fan body 4. During this process, the dust in the air is filtered by the provided filter screen 13 to prevent it from entering the interior of the centrifugal fan body 4 and accumulating, which affects its normal operation. When cleaning is required, it should be noted that when the baffle 23 is located at the upper end of the housing 5, one of the reciprocating lead screws 8 is driven to rotate. The rotation of the reciprocating lead screw 8 causes the engaged lead screw nut 16 to move downward. The reciprocating lead screw 8 drives the rectangular rod 17 to move downward. The downward movement of the rectangular rod 17 drives the baffle 23 downward. The downward movement of the baffle 23 isolates the corresponding position inside the housing 5. At this time, the gas cannot pass through the corresponding position. At this time, the reciprocating lead screw 8 continues to rotate, causing the rectangular rod 17 to continue to move downward. The continuous movement of the rectangular rod 17 drives the pressing plate 27 to move downward. At this time, the rectangular rod 17 moves relative to the baffle 23, and the pressing plate 27 moves downward and the U-shaped rod 10 moves downward, while compressing the first spring 9. The downward movement of the U-shaped rod 10 drives the cleaning assembly to move downward to clean the front end of the filter net 13. The reciprocating lead screw 8 continues to rotate. At this time, the lead screw nut 16 drives the rectangular rod 17 to move downward. At this time, the U-shaped rod 10 is reset under the action of the first spring 9. When the lower end of the rectangular rod 17 moves to the upper end of the baffle 23, it drives the baffle 23 to move upward together. When working, the dust is filtered by the provided filter screen 13. When cleaning the filter screen 13, the airflow on one side of the housing 5 can be blocked by the baffle 23 first, and then the filter screen 13 can be cleaned by the cleaning assembly. In this way, when cleaning, the dust will not be affected by the airflow and will not strongly adhere to the upper end of the filter screen 13, thereby effectively cleaning the dust and ensuring the air intake effect. Moreover, the filter components are arranged in two on the left and right. In this way, when cleaning one side, air can be introduced through the other side, so that the machine does not need to be shut down for cleaning, improving the use effect.

[0039] As Figure 9 shown, guide grooves 36 are provided on both inner walls of the housing 5. The baffle 23 is located inside the guide grooves 36 and slides up and down. By providing the guide grooves 36, the baffle 23 moves more stably.

[0040] As Figures 2 to 4 shown, the cleaning assembly includes a moving block 11 fixedly connected to the lower end of the U-shaped rod 10. A moving groove is provided inside the moving block 11. A scraping block 22 is slidably connected inside the moving groove. The scraping block 22 can move back and forth inside the moving groove. The front end of the scraping block 22 is uniformly fixedly connected with second springs 15. The second springs 15 have a backward thrust on the scraping block 22. The front ends of the second springs 15 are fixedly connected to the inner wall of the moving groove. Both sides of the upper end of the filter screen 13 are fixedly connected with inclined blocks 18. The upper end of the scraping block 22 is inclined;

[0041] When the U-shaped rod 10 moves up and down, it drives the moving block 11 to move, and the movement of the moving block 11 drives the scraper block 22 to move up and down. Under the action of the second spring 15, the scraper block 22 can fit the front end position of the filter 13, thereby ensuring the cleaning effect. When the scraper block 22 moves up, under the action of the inclined block 18, the scraper block 22 moves forward, so that the scraper block 22 is separated from the filter 13 when it is at the upper end. In this way, during the upward movement, the dust located at the upper end of the scraper block 22 falls down due to the inclined setting of the scraper block 22, thereby further improving the dust cleaning effect.

[0042] like Figure 4 and Figure 5 As shown, the driving mechanism includes a support plate 6 fixedly connected to the upper end of the housing 5, and the upper end of the support plate 6 is fixedly connected to a second motor 7, and the second motor 7 is a driving device. In the prior art, the output end of the second motor 7 is fixedly connected to a rotating rod 24, and the second motor 7 rotates to rotate the rotating rod 24. The upper and lower positions of the rod wall of the rotating rod 24 are fixedly connected with a one-way bearing 26, and the one-way bearing 26 is a prior art. The inner ring and the outer ring of the one-way bearing 26 can rotate relative to each other in one direction, and are locked in the other direction and cannot rotate relative to each other. The one-way locking directions of the two one-way bearings 26 are opposite, and the two one-way bearings 26 and the upper end of the rod wall of the reciprocating screw rod 8 are arranged through a belt 25 for transmission;

[0043] When the second motor 7 is working, the rotating rod 24 rotates. When the rotating rod 24 rotates clockwise, the inner ring and the outer ring of one-way bearing 26 are actually in a locked state, and the other is in an active state. The one-way bearing 26 in the locked state is rotated through the corresponding belt 25, thereby causing the corresponding reciprocating screw rod 8 to rotate. When it is necessary to control the other reciprocating screw rod 8, it is only necessary to drive the rotating rod 24 counterclockwise through the second motor 7. In this way, the two reciprocating screw rods 8 can be controlled to rotate separately through one driving device, thereby reducing the manufacturing cost.

[0044] like Figure 6 As shown, the lower end of the rectangular rod 17 is fixedly connected with a third spring 28, and the lower end of the third spring 28 is fixedly connected to the lower inner wall of the flow partition 23. When the rectangular rod 17 moves downward, the third spring 28 has a downward thrust on the flow partition 23, so that the flow partition 23 is more stable when partitioning the flow.

[0045] like Figure 3 As shown, both sides of the lower end of the shell 5 are slidably connected with a dirt collection box 12, the dirt collection box 12 is used to collect dust, the front end of the dirt collection box 12 is fixedly connected with a limit block 20, the limit block 20 can slide at the lower end of the inner part of the shell 5, and plays a limiting role, the upper end of the dirt collection box 12 is rotatably connected with a cover plate 21, the lower end of the cover plate 21 is fixedly connected with a fourth spring 19, and the fourth spring 19 has an upward supporting force on the cover plate 21;

[0046] When the moving block 11 moves downward, it contacts the upper end of the cover plate 21. The downward movement of the moving block 11 causes the cover plate 21 to rotate and simultaneously compresses the fourth spring 19. At this time, the dust to be cleaned enters the interior of the dirt collection box 12. After the cleaning is completed, the moving block 11 moves upward. At this time, the cover plate 21 is no longer under the pressure of the moving block 11 and resets under the action of the fourth spring 19. In this way, during normal ventilation operation, the dust inside the dirt collection box 12 will not be affected by the airflow and be carried out again, further improving the cleaning effect. After using it for a certain period of time, the dirt collection box 12 is pulled out to clean the dust inside.

[0047] As Figure 2 shown, the upper end of the reciprocating lead screw 8 is rotatably connected to the support plate 6, and the lower end of the reciprocating lead screw 8 is rotatably connected to the inner lower end of the housing 5, making the reciprocating lead screw 8 rotate stably.

[0048] As Figure 7 and Figure 8 shown, a vibration block 30 is provided at the lower end of the filter screen 13. The vibration block 30 is made of metal and has good vibration transmission effect. A circular opening 35 is formed inside the vibration block 30. The inner wall of the circular opening 35 is uniformly fixedly connected with first protrusions 34. Grooves 31 are formed on both sides of the lower end of the reciprocating lead screw 8. Second protrusions 33 are slidably connected inside the grooves 31. The second protrusions 33 can move inside the grooves 31. A fifth spring 32 is fixedly connected to the opposite side of the two second protrusions 33. The fifth spring 32 has a certain driving force on the second protrusions 33, and the fifth spring 32 is fixedly connected to the inner wall of the groove 31;

[0049] The rotation of the reciprocating lead screw 8 drives the two second protrusions 33 to rotate. The second protrusions 33 move and contact the first protrusions 34, causing the second protrusions 33 to move into the grooves 31 and simultaneously compress the fifth spring 32. When the first protrusions 34 are misaligned with the second protrusions 33, at this time, the second protrusions 33 move under the action of the fifth spring 32 and impact the vibration block 30, thereby causing the vibration block 30 to vibrate. The vibration block 30 transmits the vibration to the filter screen 13, thereby causing the filter screen 13 to vibrate, having the effect of shaking off the dust adhering to the filter screen 13 and further improving the dust removal effect. It should be noted here that the filter screen 13 is provided with an outer frame, so that it can receive vibrations.

[0050] Working principle: When working, the first motor 2 drives the centrifugal fan body 4 to work normally. The air inlet pipe 14 introduces gas into the interior of the centrifugal fan body 4. During this process, the dust in the air is filtered by the provided filter screen 13 to prevent it from entering the interior of the centrifugal fan body 4 and accumulating, which may affect its normal operation. When cleaning is required, it should be noted that when the baffle 23 is located at the upper end position of the housing 5, one of the reciprocating lead screws 8 is driven to rotate. The rotation of the reciprocating lead screw 8 causes the engaged lead screw nut 16 to move downward. The reciprocating lead screw 8 drives the rectangular rod 17 to move downward. The downward movement of the rectangular rod 17 drives the baffle 23 downward. The downward movement of the baffle 23 partitions the corresponding position inside the housing 5. At this time, the gas cannot pass through the corresponding position. At this time, the reciprocating lead screw 8 continues to rotate, causing the rectangular rod 17 to continue to move downward. The continuous movement of the rectangular rod 17 drives the pressing plate 27 to move downward. At this time, the rectangular rod 17 moves relative to the baffle 23, and the pressing plate 27 moves downward while the U-shaped rod 10 moves downward, compressing the first spring 9 at the same time. The downward movement of the U-shaped rod 10 drives the cleaning component to move downward to clean the front end of the filter screen 13. The reciprocating lead screw 8 continues to rotate. At this time, the lead screw nut 16 drives the rectangular rod 17 to move downward. At this time, the U-shaped rod 10 is reset under the action of the first spring 9. When the lower end of the rectangular rod 17 moves to the upper end of the baffle 23, it drives the baffle 23 to move upward together. When working, the dust is filtered by the provided filter screen 13. When cleaning the filter screen 13, the airflow on one side of the housing 5 can be blocked by the baffle 23 first, and then the filter screen 13 can be cleaned by the cleaning component. In this way, during cleaning, the dust will not be affected by the airflow and will not strongly adhere to the upper end of the filter screen 13, thus effectively cleaning the dust, ensuring the air intake effect. Moreover, the filter components are arranged in two on the left and right. In this way, when one side is being cleaned, the air can enter through the other side, so there is no need to stop the machine for cleaning, improving the use effect;

[0051] Further, when the U-shaped rod 10 moves up and down, it drives the moving block 11 to move. The movement of the moving block 11 drives the scraping block 22 to move up and down. Under the action of the second spring 15, the scraping block 22 can fit the front end position of the filter screen 13, ensuring the cleaning effect. When the scraping block 22 moves upward, at this time, under the action of the inclined block 18, the scraping block 22 moves forward, so that when the scraping block 22 is at the upper end, it separates from the filter screen 13. In this way, during the upward movement, the dust located above the scraping block 22, due to the inclined setting of the scraping block 22, causes the dust to fall, further improving the cleaning effect of the dust;

[0052] Further, when the second motor 7 operates, the rotating rod 24 rotates. When the rotating rod 24 rotates clockwise, the inner and outer rings of one of the one-way bearings 26 are in a locked state, and the other is in an active state. The one-way bearing 26 in the locked state rotates through the corresponding belt 25, thereby causing the corresponding reciprocating screw rod 8 to rotate. When it is necessary to control the other reciprocating screw rod 8, only by driving the rotating rod 24 to rotate counterclockwise by the second motor 7, the two reciprocating screw rods 8 can be controlled to rotate respectively by one driving device, reducing the manufacturing cost;

[0053] Further, when the moving block 11 moves downward, it contacts the upper end of the cover plate 21. The downward movement of the moving block 11 causes the cover plate 21 to rotate and simultaneously compresses the fourth spring 19. At this time, the dust to be cleaned enters the interior of the dirt collection box 12. After the cleaning is completed, the moving block 11 moves upward. At this time, the cover plate 21 is no longer under the pressure of the moving block 11 and resets under the action of the fourth spring 19. In this way, when working with normal ventilation, the dust inside the dirt collection box 12 will not be affected by the air flow and the dust will not be carried out again, further improving the cleaning effect. After using it for a certain period of time, the dirt collection box 12 can be pulled out to clean the dust inside;

[0054] Further, the rotation of the reciprocating screw rod 8 drives the two second convex blocks 33 to rotate. The movement of the second convex blocks 33 contacts the first convex blocks 34, causing the second convex blocks 33 to move into the interior of the groove 31 and simultaneously compressing the fifth spring 32. When the first convex blocks 34 are misaligned with the second convex blocks 33, at this time, the second convex blocks 33 move under the action of the fifth spring 32 and impact the vibration block 30, thereby causing the vibration block 30 to generate vibration. The vibration block 30 transmits the vibration to the filter screen 13, thereby causing the filter screen 13 to vibrate, which has the effect of shaking off the dust adhering to the filter screen 13 and further improving the dust removal effect. It should be noted here that the filter screen 13 is provided with an outer frame, so that it can receive vibration.

[0055] The above is only the preferred specific implementation manner of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A centrifugal fan for a cooling tower, comprising a base (1), characterized in that: The upper end of the base (1) is fixedly connected to a centrifugal fan body (4); a first motor (2) is provided at the rear end of the centrifugal fan body (4); the first motor (2) is arranged at the upper end of the base (1); the first motor (2) is used to drive the centrifugal fan body (4); an air outlet pipe (3) is provided at the upper end of the centrifugal fan body (4); a filter assembly is provided at the front end of the centrifugal fan body (4); the filter assembly is capable of filtering dust in the air; The filter assembly comprises an air inlet pipe (14) fixedly connected to the front end of the centrifugal fan body (4), a shell (5) fixedly connected to the front end of the air inlet pipe (14), a partition plate provided in the middle of the shell (5) to separate the shell (5) into two left and right spaces, a connecting port (37) provided at the rear end of the shell (5), a filter screen (13) fixedly connected to both sides of the shell (5), a flow partition plate (23) slidably connected to both sides of the shell (5), a rectangular rod (17) slidably connected to the interior of the lower end of the flow partition plate (23), and a circular groove provided inside the rectangular rod (17) (29), the inner lower end of the rectangular rod (17) is fixedly connected to a screw nut (16), the inner part of the screw nut (16) is meshedly connected to a reciprocating screw (8), the upper end of the shell (5) is slidably connected to a U-shaped rod (10), the lower end of the U-shaped rod (10) is provided with a cleaning assembly, the upper end inner wall of the U-shaped rod (10) is fixedly connected to a first spring (9), the lower end of the first spring (9) is fixedly connected to the upper end of the shell (5), the front end of the rectangular rod (17) is fixedly connected to a pressure plate (27), and the upper end of the reciprocating screw (8) is provided with a driving mechanism.

2. The centrifugal fan for a cooling tower according to claim 1, wherein: The inner walls on both sides of the shell (5) are provided with guide grooves (36), and the flow partition (23) is located inside the guide grooves (36) and slides up and down.

3. The centrifugal fan for a cooling tower according to claim 1, characterized in that: The cleaning assembly comprises a moving block (11) fixedly connected to the lower end of the U-shaped rod (10), a moving groove is provided inside the moving block (11), a scraping block (22) is slidably connected inside the moving groove, a second spring (15) is evenly and fixedly connected to the front end of the scraping block (22), and the front end of the second spring (15) is fixedly connected to the inner wall of the moving groove.

4. The centrifugal fan for a cooling tower according to claim 3, characterized in that: Both sides of the upper end of the filter screen (13) are fixedly connected with inclined blocks (18), and the upper end of the scraper block (22) is inclined.

5. A centrifugal fan for a cooling tower according to claim 1, characterized in that: The driving mechanism comprises a support plate (6) fixedly connected to the upper end of the housing (5); the upper end of the support plate (6) is fixedly connected to a second motor (7); the output end of the second motor (7) is fixedly connected to a rotating rod (24); the upper and lower positions of the rod wall of the rotating rod (24) are fixedly connected to one-way bearings (26); the one-way locking directions of the two one-way bearings (26) are opposite; the two one-way bearings (26) are arranged to be driven by the upper end of the rod wall of the reciprocating screw rod (8) through a belt (25).

6. The centrifugal fan for a cooling tower according to claim 1, characterized in that: The lower end of the rectangular rod (17) is fixedly connected to a third spring (28), and the lower end of the third spring (28) is fixedly connected to the lower inner wall of the flow partition (23).

7. The centrifugal fan for a cooling tower according to claim 1, characterized in that: The lower ends of both sides of the housing (5) are slidably connected with dirt collection boxes (12), and a limiting block (20) is fixedly connected to the front end of the dirt collection box (12).

8. The centrifugal fan for a cooling tower according to claim 7, characterized in that: A cover plate (21) is rotatably connected to the upper end of the dirt collection box (12), and a fourth spring (19) is fixedly connected to the lower end of the cover plate (21).

9. The centrifugal fan for a cooling tower according to claim 5, wherein: The upper end of the reciprocating lead screw (8) is rotatably connected to the support plate (6), and the lower end of the reciprocating lead screw (8) is rotatably connected to the inner part of the lower end of the housing (5).

10. A centrifugal fan for a cooling tower according to claim 1, characterized in that: A vibration block (30) is arranged at the lower end of the filter screen (13). A circular opening (35) is formed inside the vibration block (30). First convex blocks (34) are evenly fixedly connected to the inner wall of the circular opening (35). Grooves (31) are formed on both sides of the lower end of the reciprocating lead screw (8). Second convex blocks (33) are slidably connected inside the grooves (31). A fifth spring (32) is fixedly connected to the opposite side of each of the two second convex blocks (33). The fifth spring (32) is fixedly connected to the inner wall of the groove (31).

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