Rainproof fan for cooling tower of transformer substation

Abstract

A rainproof fan for a cooling tower of a transformer substation relates to the technical field of the cooling tower of the transformer substation, comprises a fan base supporting leg, a water collector, an air inlet grille, a middle shell, an upper shell, a heat dissipation system and a rainwater collection system, and solves the problems that most fans adopted by the existing cooling tower are installed in the open air and cannot be used in rainy days. Rainwater can enter the fan, parts in the fan are damaged, so that the cooling effect of a cooling tower is influenced, part of the fan is prevented from being eroded by the rainwater by installing a shell outside the fan, but along with the increase of the service life, the rainwater can corrode the surface of the shell to cause a rusting phenomenon, and further the continuous use of the fan can be influenced, so that the service life of the fan is prolonged. And in addition, the weakly acidic rainwater can enter the cooling tower through the air outlet and corrode parts in the cooling tower, so that the problem that the cooling tower cannot operate normally is solved.

Description

Technical Field

[0001] This invention relates to the field of substation cooling tower technology, specifically to a rainproof fan for substation cooling towers. Background Technology

[0002] Cooling towers utilize forced airflow to partially vaporize cooling water, carrying away some of the heat and thus lowering the water temperature. They are specialized cooling water heat dissipation devices commonly used in substations. Mechanically ventilated cooling towers rely on forced airflow from fans to cool water. They can be divided into co-flow and counter-flow types, with counter-flow cooling towers being the most widely used. These towers typically use axial flow fans as their primary power source, whose function is to agitate the airflow within the cooling tower during operation, creating conditions for heat dissipation from the cooling water.

[0003] Currently, most existing cooling towers use fans installed outdoors. On rainy days, rainwater can enter the fan and damage internal components, thus affecting the cooling effect of the cooling tower. Some cooling towers use an external casing to block rainwater erosion, but as the years of use increase, rainwater will corrode the surface of the casing and cause rust, which will affect the continued use of the fan. In addition, weakly acidic rainwater can also enter the cooling tower through the air outlet and corrode the internal parts, causing the cooling tower to malfunction. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a rainproof fan for substation cooling towers to solve the problems mentioned in the background technology.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a rainproof fan for a substation cooling tower, including a water collector, an air inlet grille fixedly installed on the upper end of the water collector, a middle casing fixedly connected to the upper end of the air inlet grille, and an upper casing fixedly connected to the upper end of the middle casing. A heat dissipation system is installed on the upper part of the upper casing, and a rainwater collection system is connected to the upper part of the heat dissipation system; among which... The heat dissipation system includes a cooling fan, a rain cover, and a hollow gear shaft. The cooling fan is fixedly installed inside the rain cover via a motor base. The lower end of the rain cover is fixedly connected to the top of the upper housing. A primary turntable is fixedly installed in the middle of the hollow gear shaft. Heat dissipation fins are evenly arranged along the circumference of the outer wall of the primary turntable. A water distribution system is provided on the hollow gear shaft below the heat dissipation fins. A rainwater collection system is connected to the upper end of the hollow gear shaft. The rainwater collection system includes a water collection funnel, a connecting rod, a rainwater collection mechanism, a drain pipe, a water storage tank, and a cooling pipe. The upper end of the connecting rod is fixedly connected to the water collection funnel, and the bottom of the water collection funnel is equipped with a drain pipe. The lower end of the drain pipe is rotatably connected to the upper end of a hollow gear shaft. The water collection funnel is equipped with a rainwater collection mechanism inside, and cooling pipes are evenly arranged along the circumference of the middle of the outer wall of the water collection funnel.

[0006] The beneficial effects of this invention are: 1. The rainwater harvesting system of this invention can not only protect the cooling fan from rain, but also collect, purify, neutralize and cool rainwater on rainy days, thereby reducing the amount of cooling water used and saving cooling costs. When the rainwater in the rainwater harvesting system has been collected to a certain extent, the excess rainwater will enter the cooling channel and cooling chamber along the cooling pipe, thereby achieving the function of heat dissipation for the middle casing and upper casing, and thus improving the final heat dissipation effect. 2. The cooling fan of this invention is equipped with a rain cover on the outside, which not only prevents rainwater erosion, but also extends the service life of the cooling fan when running at high altitudes, reduces the number of maintenance times, and ensures stable operation of the cooling work. 3. The heat dissipation system of the present invention can agitate the airflow inside the upper casing and simultaneously perform circumferential spraying of cooling water during heat dissipation. The cooling water can absorb the heat inside the middle and upper casings, and the cooling water will be partially atomized under the action of agitated airflow, prolonging the residence time of the cooling water inside the upper casing, increasing the heat exchange rate, and thus improving the heat dissipation effect. At the same time, the agitated airflow can carry away some of the heat in the atomized cooling water, further improving the heat dissipation effect. The rainwater collection system can neutralize the collected rainwater and connect it to the cooling water for simultaneous use, greatly reducing the amount of cooling water used and solving the problem that weakly acidic rainwater will corrode the middle and upper casings and the cooling fan casing. Attached Figure Description

[0007] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0008] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 3 In this invention Figure 2 A magnified structural diagram at point A; Figure 4 In this invention Figure 2 A magnified structural diagram at point B; Figure 5 This is a top view of the present invention; Figure 6 In this invention Figure 5 CC-direction sectional view; Figure 7 In this invention Figure 6 A magnified structural diagram at point D; Figure 8 This is a schematic diagram of the hollow toothed shaft and water distribution system in this invention.

[0009] In the diagram: 1-Base support leg, 11-Leveling pad, 2-Water collector, 21-Drainage pipe, 3-Air inlet grille, 4-Middle casing, 41-Mounting bracket, 42-Material fixing rod, 43-Material ring, 5-Upper casing, 51-Reinforcing rib, 52-Cooling channel, 53-Cooling chamber, 6-Heat dissipation system, 61-Cooling fan, 62-Rain cover, 63-Drive wheel, 64-Driven wheel, 65-Hollow gear shaft, 66-First stage turntable, 67-Heat dissipation fins 68-Water distribution system, 681-Secondary turntable, 682-Splash guard, 6821-Water collection channel, 683-Water distribution main shaft, 684-Water distributor head, 7-Rainwater collection system, 71-Water collection funnel, 72-Connecting rod, 73-Rainwater collection mechanism, 731-Cylinder filter, 732-Compression spring, 733-Pressure pad, 734-Vertical support rod, 735-Water stop plate, 74-Leakage pipe, 75-Water reservoir, 76-Cooling pipe. Detailed Implementation

[0010] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0011] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods. Example 1:

[0012] See Figures 1 to 8 A rainproof fan for a substation cooling tower includes a base support leg 1, a water collector 2, an air inlet grille 3, a middle casing 4, an upper casing 5, a heat dissipation system 6, and a rainwater collection system 7. The water collector 2 is fixedly connected to the upper end of the base support leg 1, the air inlet grille 3 is fixedly installed on the upper end of the water collector 2, the middle casing 4 is fixedly connected to the upper end of the air inlet grille 3, the upper casing 5 is fixedly connected to the upper end of the middle casing 4, the heat dissipation system 6 is installed on the upper end of the upper casing 5, and the rainwater collection system 7 is connected to the upper end of the heat dissipation system 6. See Figure 1 and Figure 2 The number of the base support legs 1 is four, and each base support leg 1 is fixedly installed with a leveling pad 11 at its lower end. The leveling pad 11 can improve the stability of the rainproof fan of the substation cooling tower during use, thereby ensuring the smooth progress of the cooling process.

[0013] See Figure 2The water collector 2 has a groove-shaped cross section and a drainage pipe 21 is installed in the middle of the lower end of the water collector 2.

[0014] See Figure 2 , Figure 5 and Figure 6 A mounting bracket 41 is fixedly installed in the middle of the inner wall of the intermediate housing 4. A material fixing rod 42 is fixedly connected to the lower end face of the mounting bracket 41 at an angle. The distance between the material fixing rod 42 and the inner wall of the intermediate housing 4 gradually decreases from top to bottom. A material ring 43 is fixedly installed circumferentially on the outer wall of the material fixing rod 42. The material ring 43 is concentrically arranged and its diameter gradually increases from top to bottom. This structural design of the material ring 43 can maximize the contact area between the cooling water and the air, prolong the residence time of the cooling water in the intermediate housing 4, increase the heat exchange, and achieve uniform water distribution, so that all the cooling water in the intermediate housing 4 can be heat exchanged, thereby achieving a better heat dissipation effect. In actual operation, the cooling water sprayed by the heat dissipation system 6 will fall downward onto the material ring 43 and adhere to the surface of the material ring 43, thereby increasing the contact area between the cooling water and the air, improving the heat dissipation of the cooling water, and achieving a better heat dissipation effect.

[0015] See Figure 2 , Figure 3 , Figure 6 and Figure 7 The top of the upper casing 5 has a mesh structure design, and reinforcing ribs 51 are evenly arranged along its circumference on the outer side wall of the upper casing 5. Cooling channels 52 are opened inside the reinforcing ribs 51. A cooling chamber 53 is opened inside the middle casing 4 corresponding to the position below the cooling channels 52. The lower end of the cooling channels 52 and the cooling chamber 53 are connected to each other, and the upper end of the cooling channels 52 is connected to the lower end of the cooling pipes 76. In specific operation, when the rainwater collection system 7 collects a certain amount of rainwater, the excess rainwater will enter the cooling channels 52 and the cooling chamber 53 along the cooling pipes 76, thereby achieving the function of heat dissipation for the middle casing 4 and the upper casing 5, and thus improving the final heat dissipation effect.

[0016] See Figure 1 , Figure 2 , Figure 5 and Figure 6The heat dissipation system 6 includes a cooling fan 61, a rain cover 62, a drive wheel 63, a driven wheel 64, a hollow gear shaft 65, a primary turntable 66, heat dissipation fins 67, and a water distribution system 68. A hollow gear shaft 65 is rotatably mounted in the middle of the upper housing 5. A driven wheel 64 is mounted near the upper end of the hollow gear shaft 65 via a key connection. The drive wheel 63 meshes with the right side of the driven wheel 64. The drive wheel 63 is mounted on the output shaft of the cooling fan 61 via a key connection. The cooling fan 61 is fixedly mounted inside the rain cover 62 via a motor base. The lower end of the rain cover 62 is fixedly connected to the top of the upper housing 5. A primary turntable 66 is fixedly mounted in the middle of the hollow gear shaft 65. Heat dissipation fins 67 are evenly arranged along the circumference of the outer wall of the primary turntable 66. A water distribution system 68 is provided on the hollow gear shaft 65 below the heat dissipation fins 67. A rainwater collection system 7 is connected to the upper end of the hollow gear shaft 65.

[0017] In actual operation, during heat dissipation, the cooling fan 61 is started, which drives the driving wheel 63 and the driven wheel 64 to rotate. The driven wheel 64 then drives the hollow gear shaft 65 to rotate. During the rotation of the hollow gear shaft 65, the primary turntable 66 and the heat dissipation fins 67 can be driven to rotate. The rotation of the heat dissipation fins 67 agitates the airflow inside the upper casing 5 and makes it flow upward, thereby facilitating the removal of more heat. At the same time, it can vaporize some of the cooling water and remove some of the heat from the cooling water. Meanwhile, the water distribution system 68 performs spraying operations to increase the heat exchange and improve the heat dissipation effect.

[0018] See Figure 2 , Figure 4 and Figure 8 The water distribution system 68 includes a secondary turntable 681, a splash guard 682, a water distribution main shaft 683, and a water distributor head 684. The secondary turntable 681 is fixedly installed on the hollow gear shaft 65 near its lower end. The splash guard 682 is evenly arranged along its circumference on the outer wall of the secondary turntable 681. The splash guard 682 is installed at a downward inclination. The lower end face of the splash guard 682 is evenly provided with water collection channels 6821. When there is a lot of water mist blocking, this part of the water mist will liquefy into small water droplets, adhere to the lower end face of the splash guard 682, and drip down along the water collection channels 6821 onto the material ring 43, thereby playing a multiple heat dissipation function. The water distribution main shaft 683 is connected to the lower circumferential side wall of the hollow gear shaft 65. The water distributor head 684 is evenly installed along its axial direction on the lower end face of the water distribution main shaft 683.

[0019] In actual operation, as the hollow gear shaft 65 rotates, the secondary turntable 681 rotates synchronously. At this time, the cooling water inside the hollow gear shaft 65 enters the water distribution main shaft 683 and is then sprayed evenly downwards through the water distributor head 684. During this process, the airflow stirred by the heat dissipation fins 67 causes some of the cooling water to turn into water mist. The splash guard 682 can block this water mist and prevent it from drifting outwards, thereby achieving the purpose of water saving. Example 2:

[0020] See Figure 1 , Figure 2 , Figure 5 and Figure 6 The rainwater collection system 7 includes a water collection funnel 71, a connecting rod 72, a rainwater collection mechanism 73, a drain pipe 74, a water storage tank 75, and a cooling pipe 76. The connecting rod 72 is uniformly fixedly installed along its circumference near the upper end of the outer side wall of the middle casing 4. The upper end of the connecting rod 72 is fixedly connected to the water collection funnel 71. The drain pipe 74 is installed at the bottom of the water collection funnel 71. The lower end of the drain pipe 74 is rotatably connected to the upper end of the hollow gear shaft 65. The rainwater collection mechanism 73 is provided inside the water collection funnel 71. The cooling pipe 76 is uniformly arranged along its circumference in the middle of the outer side wall of the water collection funnel 71.

[0021] In actual operation, before operation, the water collection funnel 71 is filled with cooling water. During operation, the cooling water inside the water collection funnel 71 enters the water storage tank 75 through the water leakage pipe 74, and then enters the water distribution system 68 through the hollow gear shaft 65. This achieves the purpose of spray cooling during the air cooling process. When it rains, the water collection funnel 71 can play a certain role in blocking rain, thereby preventing rainwater from entering the cooling fan 61 and affecting its operation. At the same time, the rainwater collection mechanism 73 can collect and purify the rainwater, and then spray it downward along with the cooling water. This not only provides rain protection but also saves on the amount of cooling water used and reduces heat dissipation costs.

[0022] See Figure 6The rainwater collection mechanism 73 includes a cylindrical filter 731, a compression spring 732, a pressure-bearing pad 733, a vertical support rod 734, and a water-stop plate 735. The cylindrical filter 731 is fixedly installed in the water collection funnel 71, with its opening facing downwards. The cylindrical filter 731 is filled with a rainwater neutralizer, which neutralizes the weakly acidic rainwater into neutral water, thereby preventing acidic substances in the rainwater from corroding the air intake grille 3, the middle casing 4, and the upper casing 5. A vertical support rod 734 is fixedly connected to the middle of the upper end face. A compression spring 732 is evenly arranged around the circumference of the cylindrical filter 731 on the outer side of the vertical support rod 734. A pressure bearing plate 733 is fixedly connected to the upper end of the compression spring 732. The outer edge of the pressure bearing plate 733 slides in fit with the inner wall of the water collection funnel 71. A circular through hole is opened in the middle of the pressure bearing plate 733. The upper end of the vertical support rod 734 passes through to the upper end of the circular through hole and is fixedly connected to a water stop plate 735. The lower end face of the water stop plate 735 is in contact with the upper end face of the pressure bearing plate 733.

[0023] In practice, during rainy weather, rainwater accumulates on the pressure plate 733 inside the water collection funnel 71. As the amount of rainwater increases, the weight of the rainwater causes the compression spring 732 to compress. At this time, the pressure plate 733 moves downward and disengages from the water stop plate 735. The rainwater on the pressure plate 733 then flows downward through the circular through hole in the middle of the pressure plate 733 into the water collection funnel 71. Subsequently, the pressure of the rainwater on the pressure plate 733 decreases, and the reaction force of the compression spring 732 causes the pressure plate 733 to return to its original position. This process repeats, thus achieving the function of automatically collecting rainwater.

[0024] The working principle of this invention during use is as follows: S1: Before operation, the water collection funnel 71 is filled with cooling water. During heat dissipation, the cooling fan 61 is started, which drives the driving wheel 63 and the driven wheel 64 to rotate. The driven wheel 64 then drives the hollow gear shaft 65 to rotate. During the rotation of the hollow gear shaft 65, it drives the primary turntable 66 and the heat dissipation fins 67 to rotate. The rotation of the heat dissipation fins 67 agitates the airflow inside the upper casing 5, causing it to flow upwards, thus facilitating the removal of more heat and achieving the purpose of heat dissipation. During this process, the water collection funnel 71 is filled with cooling water. Cooling water inside funnel 71 enters water reservoir 75 through water pipe 74, then flows downward through hollow gear shaft 65 into water distribution main shaft 683, and is then sprayed evenly downward through water distributor head 684. The rotation of heat dissipation fins 67 vaporizes some of the cooling water into water mist. Splash baffle 682 can block this water mist to prevent it from drifting outward, thereby achieving the purpose of water saving. During the rotation of hollow gear shaft 65, secondary turntable 681 will rotate synchronously, thereby achieving the function of uniform circumferential spraying. S2: The cooling water sprayed in the above steps will fall downwards onto the material ring 43 and adhere to the surface of the material ring 43, thereby increasing the contact area between the cooling water and the air, increasing the heat dissipation of the cooling water, and achieving a better heat dissipation effect. S3: When it rains, the water collection funnel 71 can act as a rain shield, preventing rainwater from entering the cooling fan 61 and affecting its operation. Simultaneously, rainwater accumulates on the pressure plate 733 inside the water collection funnel 71. As the amount of rainwater increases, the weight of the rainwater compresses the compression spring 732. At this time, the pressure plate 733 moves downwards and disengages from the water stop plate 735. The rainwater on the pressure plate 733 then flows downwards through the circular through-hole in the center of the pressure plate 733 into the water collection funnel. Inside the bucket 71, the pressure of rainwater on the pressure pad 733 decreases, and the reaction force of the compression spring 732 will drive the pressure pad 733 to reset. This process repeats, thus achieving the function of automatically collecting rainwater. The rainwater is then sprayed downwards along with the cooling water, which not only provides rain protection but also saves on the amount of cooling water used and reduces heat dissipation costs. At the same time, the cartridge filter 731 can neutralize the weakly acidic rainwater into neutral water, thereby preventing acidic substances in the rainwater from corroding the air intake grille 3, the middle casing 4, and the upper casing 5. S4: When the rainwater in the water collection funnel 71 is collected to a certain extent, the excess rainwater will enter the cooling channel 52 and the cooling chamber 53 along the cooling pipe 76, thereby achieving the function of cooling the middle casing 4 and the upper casing 5, and thus improving the final heat dissipation effect.

[0025] It is worth noting that when the rainproof fan of the cooling tower of the substation is in use, the drainage pipe 21 at the bottom of the water collector 2 can be connected to the existing return equipment, and then the return equipment can be connected to the inside of the water collection funnel 71 (not shown in the figure). In this way, the function of circulating cooling water can be realized, thereby reducing heat dissipation costs.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rainproof fan for a substation cooling tower, characterized in that, include: A water collector, with an air inlet grille fixedly installed at the top of the water collector, a middle housing fixedly connected to the top of the air inlet grille, and an upper housing fixedly connected to the top of the middle housing. A heat dissipation system is installed on the upper part of the upper casing, and a rainwater collection system is connected to the upper part of the heat dissipation system; among which... The heat dissipation system includes a cooling fan, a rain cover, and a hollow gear shaft. The cooling fan is fixedly installed inside the rain cover via a motor base. The lower end of the rain cover is fixedly connected to the top of the upper housing. A primary turntable is fixedly installed in the middle of the hollow gear shaft. Heat dissipation fins are evenly arranged along the circumference of the outer wall of the primary turntable. A water distribution system is provided on the hollow gear shaft below the heat dissipation fins. A rainwater collection system is connected to the upper end of the hollow gear shaft. The rainwater collection system includes a water collection funnel, a connecting rod, a rainwater collection mechanism, a drain pipe, a water storage tank, and a cooling pipe. The upper end of the connecting rod is fixedly connected to the water collection funnel, and the bottom of the water collection funnel is equipped with a drain pipe. The lower end of the drain pipe is rotatably connected to the upper end of a hollow gear shaft. The water collection funnel is equipped with a rainwater collection mechanism inside, and cooling pipes are evenly arranged along the circumference of the middle of the outer wall of the water collection funnel.

2. The rainproof fan for a substation cooling tower according to claim 1, characterized in that, The machine base has four legs, and each leg is fixedly equipped with a leveling pad at its lower end.

3. A rainproof fan for a substation cooling tower according to claim 2, characterized in that, The water collector has a groove-shaped cross-section and a drainage pipe is installed in the middle of the lower end of the water collector.

4. A rainproof fan for a substation cooling tower according to claim 1, characterized in that, A mounting bracket is fixedly installed in the middle of the inner side wall of the machine housing. A material fixing rod is fixedly connected to the lower end face of the mounting bracket at an incline. The distance between the material fixing rod and the inner side wall of the machine housing gradually decreases from top to bottom. A material ring is fixedly installed circumferentially on the outer side wall of the material fixing rod.

5. A rainproof fan for a substation cooling tower according to claim 4, characterized in that, The material rings are concentrically arranged and their diameter gradually increases from top to bottom.

6. A rainproof fan for a substation cooling tower according to claim 1, characterized in that, The top of the upper housing has a mesh structure design and the outer side wall of the upper housing is uniformly provided with reinforcing ribs along its circumference. Cooling channels are opened inside the reinforcing ribs. A cooling chamber is opened inside the middle housing at the position below the cooling channels. The lower end of the cooling channels and the cooling chamber are connected to each other, and the upper end of the cooling channels and the lower end of the cooling pipes are connected.

7. A rainproof fan for a substation cooling tower according to claim 1, characterized in that, The water distribution system includes a secondary turntable, splash guards, a water distribution main shaft, and water distributor heads. The secondary turntable is fixedly installed on the hollow gear shaft near its lower end. Splash guards are evenly arranged along the circumference of the outer side wall of the secondary turntable. The water distribution main shaft is connected to the circumferential side wall at the lower end of the hollow gear shaft. Water distributor heads are evenly installed along the axial direction on the lower end face of the water distribution main shaft.

8. A rainproof fan for a substation cooling tower according to claim 1, characterized in that, The splash guard has water collection channels evenly distributed on its lower end face.

9. A rainproof fan for a substation cooling tower according to claim 1, characterized in that, The rainwater collection mechanism includes a cylindrical filter, a compression spring, a pressure plate, a vertical support rod, and a water stop plate. The cylindrical filter is fixedly installed in the water collection funnel. A vertical support rod is fixedly connected to the middle of the upper end face of the cylindrical filter. Compression springs are evenly arranged along the circumference of the cylindrical filter outside the vertical support rod. A pressure plate is fixedly connected to the upper end of the compression spring.

10. A rainproof fan for a substation cooling tower according to claim 9, characterized in that, The outer edge of the pressure bearing plate and the inner wall of the water collection funnel slide together. A circular through hole is opened in the middle of the pressure bearing plate. The upper end of the vertical support rod passes through the upper end of the circular through hole and is fixedly connected to a waterstop plate. The lower end face of the waterstop plate and the upper end face of the pressure bearing plate are in contact.

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