Small-flow uniform water spraying device of cooling tower

Abstract

The invention relates to the field of cooling equipment, in particular to a small-flow uniform water spraying device of a cooling tower, the inner top of the cooling tower is provided with a water distribution disc, the bottom of the cooling tower is provided with a water basin, the water basin is connected with a self-circulation water supplementing device, and cold water in the water basin can be conveyed to a tower top water inlet pipe through the self-circulation water supplementing device and enters the water distribution disc after being mixed with water outside the tower; and a spraying piece is arranged on the water distribution disc. According to the invention, under the working condition that external water of the tower is extremely small in flow, water sprayed to the filler by the cooling tower can be uniformly distributed, so that the cooling effect of the filler at each position is exerted.

Description

Technical Field

[0001] The present application relates to the field of cooling equipment, and in particular to a small-flow uniform water sprinkling device for a cooling tower. Background Art

[0002] The main function of a cooling tower is to reduce the temperature of circulating water through contact between water and air. In a cooling tower, the uniformity of water distribution on the fill is crucial to ensure the cooling effect of the cooling tower.

[0003] Cooling towers are usually designed to cool large flows of hot water from users (i.e., the circulating water of the system) during the high temperatures of summer. A large amount of water can be easily sprayed evenly on the filler, allowing the filler to fully exert its cooling effect, thereby reducing the temperature of the hot water to the greatest extent, and then sent to the user as cooling water to absorb heat. However, in autumn and winter, the temperature is lower, and the user's demand for cooling water decreases, or the flow of hot water from the user is small. At this time, the cooling tower will operate under low flow or even very low flow conditions. At this time, the spraying area of ​​each nozzle is not large enough, and the spraying is not uniform enough. Some fillers will not be sprayed with water and cannot play a cooling role. Summary of the invention

[0004] In order to solve the problem of uneven water distribution in a cooling tower when the user's incoming water flow is small or extremely small, the present application provides a small-flow uniform water sprinkling device for a cooling tower.

[0005] The present application provides a cooling tower small flow uniform water spraying device, which adopts the following technical solution: A small flow uniform water sprinkling device for a cooling tower comprises a cooling tower, wherein a water distribution tray is arranged at the top of the cooling tower above the filler, and a water basin is arranged at the bottom of the cooling tower below the filler. The water basin is connected to a self-circulating water replenishing device, and the self-circulating water replenishing device is used to transport the cold water in the water basin to the water inlet pipe at the top of the tower, mix with the water outside the tower, and then enter the water distribution tray. A spraying member is arranged on the water distribution tray.

[0006] By adopting the above technical solution, under the conditions of small flow and ultra-small flow, a part of the cold water in the water basin at the bottom of the tower is extracted by a self-circulating water replenishment device, and mixed with the system circulating water with ultra-small flow but higher temperature in the water inlet pipe, so that the mixed water volume reaches the water volume that can be sprayed evenly, and then sprayed onto the packing through the spraying parts, thereby ensuring that the water on the packing is evenly distributed, thereby enhancing the cooling effect of the small flow water.

[0007] Preferably, the self-circulating water replenishment device includes a water replenishment pump, a valve and a water replenishment pipe, the water inlet pipe is connected to water outside the tower, the water inlet of the water replenishment pump is connected to the water basin, the water outlet of the water replenishment pump is connected to the water inlet pipe via the valve and the water replenishment pipe, and the outlet of the water inlet pipe is located above the water distribution tray.

[0008] By adopting the above technical scheme, under the conditions of small flow and ultra-small flow, a part of the cold water in the water basin below the tower is pumped out by a water supply pump, and enters the water inlet pipe through the valve and the water supply pipe, and is mixed with the water from outside the tower with ultra-small flow but higher temperature in the water inlet pipe, so that the mixed water volume reaches the water volume that can be sprayed evenly. The water supply from the water basin below the tower is cold water itself. After being sprayed with mixed water, it returns to the water basin below the cooling tower, so it is called the self-circulating water supply of the tower. Self-circulating water supply does not increase the heat of the spray water, but reduces the temperature of the water, reduces the temperature difference between the inlet and outlet water of the filler, and slightly increases the difficulty of cooling the water. However, compared with the water short circuit and over-wind short circuit caused by uneven water spraying, it is much easier to cool the incoming water after the self-circulating water supply realizes uniform water spraying. When the water from outside the tower with higher water temperature has the same uniform water spraying volume, due to the higher water temperature, the heat that needs to be taken away by the fan is larger, the required fan speed is higher, and the energy consumption is higher. In comparison, when the water temperature is higher and the flow rate is very small, after adding cold water to achieve the same uniform watering volume, the water temperature is lower, the heat that needs to be removed by the fan is smaller, the fan speed is lower, and the energy consumption is less.

[0009] Preferably, the spray part includes a plurality of large nozzles and a plurality of small nozzles, and sprinklers are installed under the plurality of large nozzles and the plurality of small nozzles. The sprinkler includes an axis frame, a shaft sleeve, a shaft rod fixed to the bottom of the shaft sleeve, and propeller blades rotating around the shaft rod. The axis frame is bent, the top end of the axis frame is fixedly connected to the bottom of the large nozzle or the low-water-level nozzle, the bottom end of the axis frame is fixedly connected to the top of the shaft sleeve, and the shaft rod is coaxial with the large nozzle or the small nozzle.

[0010] By adopting the above technical solution, the sprinkler achieves uniform distribution of water flow through the rotation of the propeller blades.

[0011] Preferably, the propeller blades include a hub mounted on the shaft and a plurality of blades fixedly connected to the hub, the plurality of blades are evenly divided into two groups, the two groups of blades are symmetrically distributed around the shaft, and each group of propeller blades is arranged in layers.

[0012] By adopting the above technical solution, water flows from below the large nozzle and the small nozzle and impacts the blades, thereby driving the rotation of the hub, thereby realizing the rotation of the propeller blades.

[0013] Preferably, there are six blades, and each group of blades is divided into upper blades, middle blades and lower blades. The pitch angle of the upper blades is smaller than that of the lower blades, the area of ​​the upper blades is larger than that of the lower blades, the pitch angle of the middle blades is between the pitch angles of the upper blades and the lower blades, and the area of ​​the middle blades is also between the areas of the upper blades and the lower blades.

[0014] By adopting the above technical solution, the upper blades have a small pitch angle and spray far, so the area of ​​the water falling ring is large and the amount of water required is large. Therefore, the upper blades are designed to have a large area, receive more water, and sprinkle more water. The lower blades have a large pitch angle and spray close, so the area of ​​the water falling ring is small and the amount of water required is small. Therefore, the lower blades are designed to have a small area, receive less water, and sprinkle less water. The pitch angle and area of ​​the middle blades are between the upper and lower blades, so the water sprinkling radius and water sprinkling amount are also between the upper and lower layers. The design of the three blades with different angles and areas can evenly sprinkle water on the water surface of the filler, thereby ensuring that the filler has a good overall cooling effect on the circulating water.

[0015] Preferably, the bottom outlet of the large nozzle is streamlined and convergent.

[0016] By adopting the above technical solution, the bottom outlet of the large sprinkler head is streamlined and convergent, thereby avoiding the divergence of the flowing water column and maintaining a large downward impulse energy of the water flow, providing sufficient power for the propeller blades and ensuring that the sprinkler rotates to spray water.

[0017] Preferably, two upper water inlet grooves and two lower water inlet grooves are provided on the outer wall of the large nozzle, and the two upper water inlet grooves and the two lower water inlet grooves are symmetrically distributed with respect to the axis of the large nozzle, and the upper water inlet grooves and the lower water inlet grooves are evenly spaced around the axis of the large nozzle in a circular arrangement, and the upper water inlet grooves and the lower water inlet grooves are respectively located at the upper and lower parts of the outer wall of the large nozzle, and the lower edge of the upper water inlet groove and the upper edge of the lower water inlet groove are on the same horizontal plane, the openings of the upper water inlet groove and the lower water inlet groove gradually increase from bottom to top in the vertical direction, and both sides of the width direction of the openings of the upper water inlet groove and the lower water inlet groove are hyperbolic.

[0018] By adopting the above technical scheme, the symmetrically distributed water inlet troughs ensure the uniform distribution of water flow inside the large nozzle, avoiding water inlet deviation; the segmented design of the upper and lower water inlet troughs weakens the radial strength of the water inlet; the opening size of the water inlet trough gradually increases from bottom to top, the larger the water volume, the higher the water level, the wider the water inlet trough, the larger the allowable water inlet volume, but the smaller the water level increment, thereby reducing the increment of the gravitational potential energy of the water flow and the increment of the kinetic energy of the nozzle, controlling the overlapping area of ​​the spray circle not to be too large, and distributing the water as evenly as possible.

[0019] Preferably, the bottom outlet of the small nozzle converges to form a gradually smaller channel.

[0020] By adopting the above technical solution, the inner guide tube of the small nozzle is conical, and the bottom outlet is significantly contracted, which can avoid the divergence of the flowing water column, maintain a large downward impulse energy of the water flow, and provide sufficient kinetic energy for the propeller blade sprinkler. The water flow downward in the inner guide tube impacts the propeller blade, driving the blade to rotate, and using centrifugal force to spread the water, ensuring that the filler is evenly sprinkled with water.

[0021] Preferably, a filter cover is provided at the top opening of the large nozzle and the small nozzle, and the filter cover is used to filter impurities. The filter cover is provided with a filter hole, and the opening of the filter hole is smaller than the outlet at the bottom of the large nozzle and the small nozzle.

[0022] By adopting the above technical solution, the filter cover is used to filter larger impurities to avoid clogging the guide tube. The filter port is smaller than the outlet at the bottom of the small nozzle and the large nozzle, so that impurities that can enter the small nozzle or the large nozzle cannot block the bottom outlet, and impurities that can block the bottom outlet cannot enter the small nozzle or the large nozzle.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. Under the condition of small flow and ultra-small flow of external water, use the self-circulating water supply device to extract part of the cold water in the water basin below the tower, and mix it with the ultra-small flow but high temperature external water in the water inlet pipe, so that the mixed water volume reaches the water volume that can be sprayed evenly, and then sprayed onto the packing through the spraying parts, so as to ensure that the water on the packing is evenly distributed, thereby enhancing the cooling effect; 2. The water in the water distribution tray enters the large and small nozzles, and is sprayed out through the outlet at the bottom, and then sprayed onto the filler through the sprinkler, thereby ensuring that the water on the filler is evenly distributed to enhance the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a small flow uniform water sprinkling device for a cooling tower according to an embodiment of the present application, mainly showing a cooling tower and a self-circulating water replenishing device; Figure 2 This is a schematic diagram of the structure of a small flow uniform water spraying device for a cooling tower according to an embodiment of the present application, mainly showing a large nozzle and a water inlet tank; Figure 3 This is a schematic diagram of the structure of a small flow uniform water spraying device for a cooling tower according to an embodiment of the present application, mainly showing a high-conductivity straight cylinder and its streamlined outlet; Figure 4 This is a schematic diagram of the structure of a small flow uniform water sprinkling device for a cooling tower according to an embodiment of the present application, mainly showing the positions of the high water level and low water level water inlet; Figure 5 This is a schematic diagram of the structure of a small flow uniform water spraying device for a cooling tower according to an embodiment of the present application, mainly showing a low guide tube in a small sprinkler head; Figure 6 This is a schematic diagram of the structure of a small flow uniform water sprinkling device for a cooling tower according to an embodiment of the present application, mainly showing a sprinkler; Figure 7 This is a structural schematic diagram of a small-flow uniform water sprinkling device for a cooling tower according to an embodiment of the present application, mainly showing the watering effect of the sprinkler.

[0025] Explanation of the reference numerals: 1. cooling tower; 2. air inlet; 3. air outlet; 4. filler; 5. fan; 6. water distribution tray; 7. spray element; 8. water supply pump; 9. basin; 10. water inlet pipe; 11. water inlet trough; 111. upper water inlet trough; 112. lower water inlet trough; 12. high flow guide straight cylinder; 13. streamlined outlet; 15. sprinkler; 151. hub; 16. low flow guide cylinder; 17. upper blade; 18. middle blade; 19. lower blade; 20. shaft frame; 21. shaft sleeve; 22. shaft rod; 23. filter cover; 24. high flow guide straight cylinder sleeve; 25. low flow guide straight cylinder sleeve; 26. upper blade watering circle; 27. middle blade watering circle; 28. lower blade watering circle. DETAILED DESCRIPTION

[0026] The embodiments of the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings. The embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0027] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0028] The present application embodiment discloses a small flow uniform water spraying device for a cooling tower. Figure 1 , Figure 2 A small flow uniform water sprinkling device for a cooling tower includes a cooling tower 1, which is a cross-flow cooling tower 1. An air outlet 3 is opened at the middle top of the cooling tower 1. A fan 5 is arranged in the air outlet 3 of the cooling tower 1. Water distribution trays 6 are arranged on both sides of the air outlet 3 at the top of the cooling tower 1. Spraying parts 7 are arranged on the water distribution trays 6. Fillers 4 are arranged below the water distribution trays 6. A water basin 9 is arranged below the filler 4. The water basin 9 is connected to a self-circulating water replenishing device. The self-circulating water replenishing device includes a water replenishing pump 8, a valve and a water replenishing pipe. One end of a water inlet pipe 10 is connected to water outside the tower. The water inlet of the water replenishing pump 8 is connected to the water basin 9 through a pipeline. The water outlet of the water replenishing pump 8 is connected to the water inlet pipe 10 through a valve and a water replenishing pipe. The two outlets of the water inlet pipe 10 are respectively located above the two water distribution trays 6.

[0029] Use the water supply pump 8 to extract part of the cold water in the water basin 9 below the tower and mix it with the water from outside the tower with a very small flow rate but a higher temperature, so that the mixed water volume reaches the amount of water that can be sprayed evenly. The water supply from the water basin 9 below the tower is cold water itself. After being mixed with the incoming water for spraying, it returns to the water basin 9 below. Self-circulating water supply does not increase the heat of the spray water, but reduces the temperature of the water, reduces the temperature difference between the water inlet and outlet of the filler 4, and slightly increases the difficulty of cooling the water. However, compared with the short circuit of water supply and short circuit of over-wind caused by uneven water supply, it is much easier to cool the incoming water after self-circulating water supply achieves uniform water supply. And when the water from outside the tower with a higher water temperature reaches the same uniform water supply volume, the water temperature is higher, the heat required to be taken away by the fan 5 is larger, the speed of the fan 5 is higher, and the energy consumption is higher. In contrast, when the same uniform water supply volume is achieved after the cold water with a very small flow rate with a higher water temperature is supplemented, the water temperature is lower, the heat required to be taken away by the fan 5 is smaller, the speed of the fan 5 is lower, and the energy consumption is lower.

[0030] Reference Figure 3 , Figure 4 , Figure 5 The spraying member 7 includes a plurality of large nozzles and a plurality of small nozzles, the large nozzles and the small nozzles are distributed at intervals, the plurality of large nozzles and the plurality of small nozzles are installed at the bottom of the water distribution tray 6, and sprinklers 15 are installed under the large nozzles and the small nozzles.

[0031] The large nozzle includes a high-conductivity straight cylinder 12 and a high-conductivity straight cylinder sleeve 24. The bottom of the high-conductivity straight cylinder 12 is threadedly connected to the inner wall of the high-conductivity straight cylinder sleeve 24. Four water inlet grooves 11 are opened on the outer wall of the top of the high-conductivity straight cylinder 12, including two upper water inlet grooves 111 and two lower water inlet grooves 112. The upper water inlet grooves 111 and the lower water inlet grooves 112 are respectively located at the upper and lower parts of the outer wall of the large-conductivity straight cylinder. The four water inlet grooves are symmetrically distributed at 180 degrees with the axis of the high-conductivity straight cylinder 12 as the center, and are evenly spaced and distributed in four quadrants of a 360° annular direction. The opening sizes of the upper water inlet grooves 111 and the lower water inlet grooves 112 gradually increase from the lower road in the vertical direction. The upper water inlet grooves 111 and the lower water inlet grooves 112 are arranged at the same time. Both sides of the opening width direction of the water inlet trough 112 are hyperbolic. In other embodiments, the opening angles of the upper water inlet trough 111 and the lower water inlet trough 112 can be designed according to the amount of water to be processed. During operation, the greater the water volume, the higher the water level, the wider the water inlet trough 11, the greater the allowable water inlet volume, but the smaller the water level increment, thereby reducing the increment of the gravitational potential energy of the water flow and the increment of the kinetic energy of the nozzle, controlling the overlapping area of ​​the spray circle not to be too large, and distributing water as evenly as possible. In addition, it can effectively adapt to the water inlet volume of the cooling tower 1 to avoid excessive accumulation of circulating water and overflowing the water distribution tray 6. The bottom of the high-conductivity straight cylinder 12 is a streamlined outlet 13, and the bottom outlet of the streamlined outlet 13 is streamlined and convergent.

[0032] The water inlet of the small nozzle is flush with the bottom surface of the water distribution tray 6. When the cross-flow cooling tower 1 is operating under a small flow rate, even if the water volume in the water distribution tray 6 is small and the water level is low, water can be distributed to the filler 4 through the sprinkler 15. The small nozzle includes a low guide tube 16 and a low guide straight sleeve 25. The upper part of the low guide tube 16 is threadedly connected to the inner wall of the low guide straight sleeve 25. The interior of the low guide tube 16 shrinks in a conical shape to form a gradually smaller channel, and its inlet inner diameter is 22mm, the outlet inner diameter is 8mm, and the height is 30mm. During the downward flow of water, the cross-section of the water column gradually decreases and the flow rate increases, thereby avoiding the divergence of the flowing water column and still being able to maintain a large downward impulse energy of the water flow.

[0033] Reference Figure 4 , Figure 6 , Figure 7 The sprinkler 15 includes a shaft frame 20, a shaft sleeve 21, a shaft rod 22 fixed to the bottom of the shaft sleeve 21, and a propeller blade rotating around the shaft rod 22. The shaft frame 20 is bent, the top of the shaft frame 20 is connected to the bottom of the large nozzle or the small nozzle, the bottom of the shaft frame 20 is connected to the top of the shaft sleeve 21, the shaft rod 22 is located on the central axis of the large nozzle or the small nozzle, and the propeller blade includes a hub 151 mounted on the shaft rod 22 and a plurality of blades mounted on the hub 151. There are six blades, and the six blades are evenly divided into two groups. The two groups of blades are symmetrically distributed around the axis of the rotating sleeve. Each group of blades is divided into three layers of upper, middle and lower blades, and the upper, middle and lower three layers of blades are twisted in a spiral shape. In order to improve the uniformity of watering, different layers of blades need to have different watering radii. The upper blade 17 has a large watering radius and a large water drop ring area, and a large amount of water is required. Therefore, the upper blade 17 has a small depression angle, and it can be sprayed far. The blade area is large, so the water received is large and the water spilled is also large. In this embodiment, the depression angle of the upper blade 17 is 15°, and the blade area is 285.25 square millimeters. The lower blade 19 is a place with a smaller watering radius, a small water drop ring area, and a small amount of water is required. Therefore, the lower blade 19 has a large depression angle, and it can be sprayed close. The blade area is small, so the water received is small and the water spilled is also small. In this embodiment, the depression angle of the lower blade 19 is 45°, and the blade area is 142.41 square millimeters. The depression angle and area of ​​the middle blade 18 are between the upper and lower layers. In this embodiment, the depression angle of the middle blade 18 is 30°, and the blade area is 194.42 square millimeters. Therefore, the watering radius and watering amount are between the upper blades and the lower blades. Looking at the watering circle as a whole, starting from the center, from near to far, the watering is relatively uniform. Among the three watering circles, the upper blade watering circle 26 has a large diameter, the lower blade watering circle 28 has a small diameter, and the middle blade watering circle 27 is between the two.

[0034] The implementation principle of a small-flow uniform water sprinkling device for a cooling tower in an embodiment of the present application is as follows: under conditions of small and ultra-small flow rates of water from outside the tower, a portion of the cold water in the water basin 9 below the tower is pumped out into the water inlet pipe 10 by a water supply pump 8, and mixed with water from outside the tower with an ultra-small flow rate but higher temperature, so that the mixed water volume reaches a volume that can be evenly sprayed, ensuring that the water on the filler is evenly distributed, thereby enhancing the cooling effect.

[0035] Finally, it should be noted that the embodiments only illustrate the technical solutions of the present invention rather than limiting them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the protection scope of the present invention.

Claims

1. A small flow uniform water spraying device for a cooling tower, characterized in that: The invention comprises a cooling tower (1), wherein a water distribution tray (6) is arranged at the top of the cooling tower (1) above the filler (4), and a water basin (9) is arranged at the bottom of the cooling tower (1) below the filler (4). The water basin (9) is connected to a self-circulating water replenishing device, and the self-circulating water replenishing device is used to transport the cold water in the water basin (9) to the water inlet pipe (10) at the top of the tower to mix with water outside the tower and then enter the water distribution tray (6). The water distribution tray (6) is provided with a spraying member (7).

2. A cooling tower small flow uniform water sprinkling device according to claim 1, characterized in that: The self-circulating water replenishment device comprises a water replenishment pump (8), a valve and a water replenishment pipe, the water inlet pipe (10) is connected to water from outside the tower, the water inlet of the water replenishment pump (8) is connected to the water basin (9), the water outlet of the water replenishment pump (8) is connected to the water inlet pipe (10) via the valve and the water replenishment pipe, and the outlet of the water inlet pipe (10) is located above the water distribution tray (6).

3. A cooling tower small flow uniform water sprinkling device according to claim 1, characterized in that: The spraying member (7) comprises a plurality of large spray heads and a plurality of small spray heads, and a sprinkler is installed below the plurality of large spray heads and the plurality of small spray heads. The sprinkler (15) comprises a shaft frame (20), a shaft sleeve (21), a shaft rod (22) fixed to the bottom of the shaft sleeve (21), and a propeller blade rotating around the shaft rod (22). The shaft frame (20) is bent, the top end of the shaft frame (20) is fixedly connected to the bottom of the large spray head or the low water level spray head, the bottom end of the shaft frame (20) is fixedly connected to the top of the shaft sleeve (21), and the shaft rod (22) is coaxial with the large spray head or the small spray head.

4. A cooling tower small flow uniform water sprinkling device according to claim 3, characterized in that: The propeller blades include a hub (151) sleeved on a shaft (22) and a plurality of blades fixedly connected to the hub (151), wherein the plurality of blades are evenly divided into two groups, the two groups of blades are symmetrically distributed around the shaft (22), and each group of propeller blades is arranged in layers.

5. A cooling tower small flow uniform water sprinkling device according to claim 4, characterized in that: The blades have six pieces, and each group of the blades is divided into an upper blade (17), a middle blade (18) and a lower blade (19); the pitch angle of the upper blade (17) is smaller than the pitch angle of the lower blade (19); the area of ​​the upper blade (17) is larger than the area of ​​the lower blade (19); the pitch angle of the middle blade (18) is between the pitch angles of the upper blade (17) and the lower blade (19); and the area of ​​the middle blade (18) is also between the areas of the upper blade (17) and the lower blade (19).

6. A cooling tower small flow uniform water sprinkling device according to claim 3, characterized in that: The bottom outlet of the large nozzle is in a streamlined convergent shape.

7. A cooling tower small flow uniform water sprinkling device according to claim 3, characterized in that: Two upper water inlet grooves (111) and two lower water inlet grooves (112) are provided on the outer wall of the large nozzle. The two upper water inlet grooves (111) and the two lower water inlet grooves (112) are symmetrically distributed around the axis of the large nozzle. The upper water inlet grooves (111) and the lower water inlet grooves (112) are evenly spaced around the axis of the large nozzle in a circular arrangement. The upper water inlet grooves (111) and the lower water inlet grooves (112) are respectively located at the upper part and the lower part of the outer wall of the large nozzle, and the lower edge of the upper water inlet groove and the upper edge of the lower water inlet groove are on the same horizontal plane. The openings of the upper water inlet grooves (111) and the lower water inlet grooves (112) gradually increase in size from bottom to top in the vertical direction. Both sides of the openings of the upper water inlet grooves (111) and the lower water inlet grooves (112) in the width direction are hyperbolic.

8. A cooling tower small flow uniform water sprinkling device according to claim 3, characterized in that: The bottom outlet of the small nozzle converges to form a gradually smaller channel.

9. A cooling tower small flow uniform water sprinkling device according to claim 3, characterized in that: A filter cover (23) is provided at the top opening of the large nozzle and the small nozzle. The filter cover (23) is used to filter impurities. A filter hole is provided on the filter cover (23). The opening of the filter hole is smaller than the outlet at the bottom of the large nozzle and the small nozzle.

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