An evaporative cooling device for a cooling tower

Abstract

The present invention relates to the field of evaporative cooling, and particularly to an evaporative cooling device for a cooling tower. The technical problem to be solved is that the current packing and mesh frame are easily blocked by scale, resulting in poor heat exchange efficiency and effect of the cooling tower. An evaporative cooling device for a cooling tower includes a chassis, a cooling box, a maintenance door, etc.; the cooling box is installed on the chassis, and a maintenance door is installed on one side of the cooling box. In the present invention, two bidirectional lead screws drive two bidirectional nuts to continuously reciprocate, the two bidirectional nuts drive two racks to continuously reciprocate, the two racks drive a number of gears to continuously rotate back and forth, and the gears drive the hollow tubes and the mesh frame to continuously swing back and forth, so that the hot water can be evenly distributed onto the packing in the mesh frame, avoiding the situation that the hot water only contacts one side of the packing, which causes the impurities in the hot water to block one side of the packing, improving the air permeability of the packing and the effect of air and water vapor passing through the packing, thereby improving the heat exchange efficiency and effect of the hot water.

Description

Technical Field

[0001] The invention relates to the field of evaporative cooling, and in particular to an evaporative cooling device for a cooling tower. Background Art

[0002] A cooling tower is a device that uses water as a circulating coolant, absorbs heat from the water and discharges it into the atmosphere to lower the water temperature. It is an evaporative heat dissipation device that uses the principles of evaporative heat dissipation, convection heat transfer, and radiation heat transfer to dissipate waste heat generated in industry or refrigeration and air conditioning to lower the water temperature.

[0003] Because hot water mostly contains calcium, magnesium ions and acid carbonate, when hot water flows through the packing and the mesh frame, the sprayed hot water will first contact one of the sides of the packing and the mesh frame for a long time, which will cause the density of scale formed on the packing and the mesh frame close to the hot water and the side away from the hot water to be inconsistent, which will cause the packing and the mesh frame close to the side where the hot water is sprayed to be blocked faster, and the formed scale will block the gaps between the packing and the grid on the mesh frame, which will lead to poor heat exchange efficiency and effect of the cooling tower. Summary of the invention

[0004] In order to overcome the shortcomings of the current fillers and mesh frames that are easily clogged by scale, thereby resulting in poor heat exchange efficiency and effect of the cooling tower, in view of the shortcomings or deficiencies of the above-mentioned prior art, the present invention provides an evaporative cooling device for a cooling tower. During the hot water spraying process, the fillers and the mesh frames can be continuously turned over to make the hot water contact with all surfaces of the fillers and the mesh frames evenly, slowing down the progress of clogging of the fillers and the mesh frames, and the fillers and the mesh frames can also be moved and scrubbed, thereby improving the effect of air and water vapor passing through the fillers and the mesh frames, thereby improving the heat exchange efficiency and effect of hot water.

[0005] The technical solution of the present invention is: an evaporative cooling device for a cooling tower, comprising a base frame, a cooling box, an inspection door, a drain pipe, a water collector, an exhaust fan, a swing mechanism, a water distribution mechanism and a driving mechanism. The cooling box is installed on the base frame, an inspection door is installed on one side of the cooling box, a drain pipe is installed at the bottom of the cooling box, the drain pipe is connected to the cooling box, a plurality of air inlets are opened on both sides of the cooling box, a water collector is installed on the top of the cooling box, an exhaust fan is installed above the cooling box, a plurality of swing mechanisms are evenly spaced in the cooling box, fillers are installed in the swing mechanism, a water distribution mechanism is provided on the cooling box, the water distribution mechanism is used to evenly distribute the liquid to be cooled, and driving mechanisms are provided on both sides outside the cooling box, the driving mechanisms are used to drive the swing mechanism to swing.

[0006] Furthermore, the swinging mechanism includes a partition board, a hollow tube, and a wire mesh frame. Two partition boards are installed inside the cooling box. A number of hollow tubes are rotatably arranged at equal intervals between two opposite sides of the cooling box. A wire mesh frame is installed in the middle of each hollow tube, and packing is contained inside the wire mesh frame.

[0007] Furthermore, the water distribution mechanism includes a water inlet pipe, a slider, a water distribution pipe, and a hose. Four water inlet pipes are installed at equal intervals on the other two opposite sides of the cooling box. Four sliders are slidably arranged at equal intervals on both sides of the upper partition board. A water distribution pipe is installed between every two sliders on different sides and on the same straight line. A number of drain holes are arranged at equal intervals on the water distribution pipe. A hose is connected between each water inlet pipe and the water distribution pipe, and the water inlet pipe and the water distribution pipe are communicated through the hose.

[0008] Furthermore, the driving mechanism includes a gear, a rack, a motor, a rotating shaft, a bidirectional lead screw, and a bidirectional nut. A gear is installed at each end of each hollow tube, and the gears are located outside the cooling box. A rack is slidably arranged on each of the two opposite outer sides of the cooling box. The racks on the same side are engaged with a number of gears on the same side. A motor is installed on each of the two opposite outer sides of the cooling box. A rotating shaft is rotatably arranged on each of the two opposite outer sides of the cooling box through bearings. One end of the rotating shafts on the same side is connected to the output shaft of the motor on the same side through a coupling. A bidirectional lead screw is installed in the middle of the two rotating shafts. A bidirectional nut is connected to the bidirectional lead screw through a thread. The bidirectional nuts on the same side are connected to the racks on the same side.

[0009] Furthermore, a cleaning mechanism is further included. The cleaning mechanism is arranged on the cooling box, the hollow tubes, and the wire mesh frames, and is used to clean the impurities on the wire mesh frames. The cleaning mechanism includes an electric push rod, a connecting frame, a sliding frame, a U-shaped brush frame, and a sliding rod. Four electric push rods are installed on the outer top of the cooling box. A connecting frame is installed between every two electric push rods on the same side. Two sliding frames are slidably arranged on each hollow tube. The two sliding frames are symmetrically arranged. A U-shaped brush frame is installed on one side of the two sliding frames close to each other. A number of cleaning bristles are arranged on the inner circles of the two U-shaped brush frames. The cleaning bristles on the two U-shaped brush frames are in contact with the wire mesh frames. A sliding rod is rotatably installed on one side of the two sliding frames away from each other. Each sliding rod is slidably located inside the hollow tube. The ends of a number of sliding rods on both sides away from each other are respectively connected to one side of the two connecting frames close to each other.

[0010] Furthermore, it also includes a toggle mechanism, which is arranged on the hollow tube and the slide. The toggle mechanism is used to toggle the filler in the net frame. The toggle mechanism includes a corrugated groove plate, a toggle rod and a roller. A corrugated groove plate is installed between the two slides on each hollow tube that are close to each other. A corrugated groove is opened on the two corrugated groove plates. Each hollow tube is slidably provided with a plurality of toggle rods, each toggle rod is provided with a plurality of protrusions, and each toggle rod is rotatably provided with a roller at one end close to the corrugated groove plate, and each roller is located in the corrugated groove of the corrugated groove plate.

[0011] Furthermore, it also includes a cross bar and a return spring. A cross bar is fixedly installed between every two sliders. The four cross bars slide through the two sides of the cooling box. A return spring is connected between the four cross bars and the side of the cooling box. The ends of the four cross bars that are away from each other are in contact with the sides of the two coupling frames that are close to each other.

[0012] Furthermore, it also includes a cleaning brush roller and a transmission assembly. A cleaning brush roller is rotatably provided on both sides of the lower part of the cooling box near the air inlet. A number of cleaning bristles are provided on the two cleaning brush rollers. A transmission assembly is connected between one end of the cleaning brush roller on the same side and one end of the rotating shaft on the same side.

[0013] Furthermore, each transmission assembly is composed of two pulleys and a flat belt, the two pulleys are connected to the cleaning brush roller and the rotating shaft respectively, and a flat belt is wound between the two pulleys.

[0014] The beneficial effects are: 1. Two bidirectional screws drive two bidirectional nuts to move back and forth continuously, the two bidirectional nuts drive two racks to move back and forth continuously, the two racks drive several gears to rotate back and forth continuously, and the gears drive the hollow tube and the mesh frame to swing back and forth continuously, so that the hot water can be evenly distributed on the filler in the mesh frame, avoiding hot water contacting only one side of the filler and causing impurities in the hot water to block one side of the filler, thereby improving the air permeability of the filler, and then improving the effect of air and water vapor passing through the filler, thereby improving the heat exchange efficiency and effect of hot water.

[0015] 2. The telescopic rod of the electric push rod drives the two coupling frames to move back and forth, and the reciprocating movement of the two coupling frames drives the sliding rod. The sliding frame and the return brush frame move back and forth on the screen frame. The bristles on the return brush frame can clean the impurities remaining on the screen frame, so that the screen frame will not be blocked after long-term use, and air and water vapor can pass through the screen frame smoothly, thereby further improving the heat exchange efficiency and effect of hot water.

[0016] 3. Under the action of the corrugated grooves on the corrugated trough plate, the roller can be driven to move reciprocally continuously. The roller drives the toggle rod to move reciprocally continuously. The protrusions on the toggle rod will toggle the packing material in the mesh frame, enabling the packing materials to move and rub against each other. As a result, the water scale between the packing materials can become loose and fall off, thereby preventing impurities in the hot water from forming water scale between the packing materials and blocking the gaps between the packing materials, allowing air and water vapor to smoothly pass through the gaps between the packing materials, and further improving the heat exchange efficiency and effect of the hot water. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the cooling box and the drive mechanism of the present invention.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the cooling box, the inspection door and the cleaning mechanism of the present invention.

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the cooling box, the swing mechanism and the water distribution mechanism of the present invention.

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the swing mechanism and the water distribution mechanism of the present invention.

[0021] Figure 5 It is a disassembled three-dimensional structural schematic diagram of some parts of the cooling box, the inspection door, the drain pipe, the water collector, the exhaust fan and the swing mechanism of the present invention.

[0022] Figure 6 It is a disassembled three-dimensional structural schematic diagram of some parts of the chassis, the cooling box, the inspection door, the drain pipe, the water collector, the exhaust fan and the swing mechanism of the present invention.

[0023] Figure 7 It is a disassembled three-dimensional structural schematic diagram of some parts of the water distribution mechanism and the drive mechanism of the present invention.

[0024] Figure 8 It is a three-dimensional structural schematic diagram of the drive mechanism and the cleaning mechanism of the present invention.

[0025] Figure 9 It is a three-dimensional structural schematic diagram of the cleaning mechanism of the present invention.

[0026] Figure 10 It is a three-dimensional structural schematic diagram of the cleaning mechanism and the toggling mechanism of the present invention.

[0027] Figure 11 It is a disassembled three-dimensional structural schematic diagram of some parts of the cleaning mechanism and the toggling mechanism of the present invention.

[0028] Figure 12 It is a three-dimensional structural schematic diagram of the cooling box, the rotating shaft, the cleaning brush roller and the transmission assembly of the present invention.

[0029] The names and serial numbers of the parts in the figure are: 1_base frame, 2_cooling box, 21_inspection door, 22_drain pipe, 23_air inlet, 24_water collector, 25_exhaust fan, 31_partition, 32_hollow pipe, 33_screen frame, 41_water inlet pipe, 42_slider, 43_water distribution pipe, 44_hose, 51_gear, 52_rack, 53_motor, 54_rotating shaft, 55_bidirectional screw rod, 56_bidirectional nut, 61_electric push rod, 62_coupling frame, 63_slide, 64_return brush holder, 65_slide rod, 71_corrugated groove plate, 72_toggle rod, 73_roller, 81_cross bar, 82_reset spring, 91_cleaning brush roller, 92_transmission assembly. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0031] Embodiment 1: An evaporative cooling device for a cooling tower, such as Figures 1-8 As shown, it includes a base frame 1, a cooling box 2, an inspection door 21, a drain pipe 22, a water collector 24, an exhaust fan 25, a swing mechanism, a water distribution mechanism and a driving mechanism. The cooling box 2 is installed on the base frame 1 by bolts, and an inspection door 21 is installed on one side of the cooling box 2 by hinges. A drain pipe 22 is installed at the bottom of the cooling box 2, and the drain pipe 22 is connected to the cooling box 2. A plurality of air inlets 23 are opened on both sides of the cooling box 2. A water collector 24 for collecting water is installed on the top of the cooling box 2, and an exhaust fan 25 for exhaust is installed above the cooling box 2. A plurality of swing mechanisms are evenly spaced in the cooling box 2, and fillers are installed in the swing mechanism. A water distribution mechanism is provided on the cooling box 2, and the water distribution mechanism is used to evenly distribute the liquid to be cooled. Driving mechanisms are provided on both sides outside the cooling box 2, and the driving mechanisms are used to drive the swing mechanism to swing.

[0032] The swing mechanism includes a partition 31, a hollow tube 32 and a mesh frame 33. Two partitions 31 are installed in the cooling box 2 by bolts. A plurality of hollow tubes 32 are evenly spaced between two opposite sides of the cooling box 2 and rotatably provided by bearings. A mesh frame 33 is installed in the middle of each hollow tube 32. The mesh frame 33 is filled with an appropriate amount of filler. The mesh frame 33 is located between the two partitions 31.

[0033] The water distribution mechanism includes a water inlet pipe 41, a slider 42, a water distribution pipe 43 and a hose 44. Four water inlet pipes 41 are evenly spaced and installed on the other two opposite sides of the cooling tank 2. Four sliders 42 are slidably arranged on both sides of the upper partition 31 at even intervals. The sliders 42 will slide along the upper partition 31. A water distribution pipe 43 for evenly distributing hot water is installed between every two sliders 42 on different sides and on the same straight line. A number of drain holes are evenly spaced on the water distribution pipe 43. A hose 44 is connected between each water inlet pipe 41 and the water distribution pipe 43, and the water inlet pipe 41 and the water distribution pipe 43 are communicated through the hose 44.

[0034] The driving mechanism includes a gear 51, a rack 52, a motor 53, a rotating shaft 54, a bidirectional lead screw 55 and a bidirectional nut 56. A gear 51 is installed at both ends of each hollow pipe 32. The gear 51 is located outside the cooling tank 2. A rack 52 is slidably arranged on the two opposite outer sides of the cooling tank 2. The rack 52 will slide along the cooling tank 2. The rack 52 on the same side meshes with several gears 51 on the same side. A motor 53 is installed on the two opposite outer sides of the cooling tank 2. A rotating shaft 54 is rotatably arranged on the two opposite outer sides of the cooling tank 2 through bearings. One end of the rotating shaft 54 on the same side is connected to the output shaft of the motor 53 on the same side through a coupling. A bidirectional lead screw 55 is installed in the middle of the two rotating shafts 54. A bidirectional nut 56 is connected to the bidirectional lead screw 55 through a thread. The bidirectional nut 56 on the same side is connected to the rack 52 on the same side.

[0035] Initially, the operator loads an appropriate amount of packing into the screen frame 33, then connects a hot water pipe to each water inlet pipe 41, and then opens the valve of the hot water pipe. The hot water enters the water distribution pipe 43 through the water inlet pipe 41 from the hose 44 and is discharged from several drain holes on the water distribution pipe 43 onto the packing in the screen frame 33. The hot water can be distributed onto the packing in the screen frame 33 and form a water film. The water film exchanges heat with the dry air entering from the air inlet 23, evaporates into the air and takes away heat. At the same time, the operator starts the exhaust fan 25 to extract the water vapor evaporated in the cooling box 2. After the water vapor contacts the water collector 24, the water collector 24 collects the evaporated water vapor to reduce water loss. The cooled water is discharged through the drain pipe 22. When the equipment fails, the operator can enter the interior of the equipment through the maintenance door 21 for maintenance. During the cooling process, since the hot water to be cooled contains some impurities, the operator starts the output shafts of the two motors 53 to rotate. The output shafts of the two motors 53 drive the two rotating shafts 54 and the two bidirectional lead screws 55 to rotate. The two bidirectional lead screws 55 drive the two bidirectional nuts 56 to move back and forth continuously. The two bidirectional nuts 56 drive the two racks 52 to move back and forth continuously. The two racks 52 drive several gears 51 to rotate back and forth continuously. The gears 51 drive the hollow pipe 32 and the screen frame 33 to swing back and forth continuously, so that the hot water can be evenly distributed onto the packing in the screen frame 33, avoiding the situation that the hot water only contacts one side of the packing and causing the impurities in the hot water to block one side of the packing, thereby improving the air permeability of the packing, further improving the effect of air and water vapor passing through the packing, and thus improving the heat exchange efficiency and effect of the hot water. After the cooling tower finishes working, the operator can close the valve of the hot water pipe, the exhaust fan 25 and the motor 53.

[0036] Embodiment 2: On the basis of Embodiment 1, as Figures 8-11 shown, it further includes a cleaning mechanism. The cleaning mechanism is arranged on the cooling box 2, the hollow pipe 32 and the screen frame 33. The cleaning mechanism is used to clean the impurities on the screen frame 33. The cleaning mechanism includes an electric push rod 61, a connecting frame 62, a sliding frame 63, a loop brush frame 64 and a sliding rod 65. Four electric push rods 61 are installed on the outer top of the cooling box 2 through bolts. A connecting frame 62 is installed between the two electric push rods 61 on the same side. Two sliding frames 63 are slidably arranged on each hollow pipe 32. The two sliding frames 63 are symmetrically arranged. A loop brush frame 64 for cleaning the impurities on the screen frame 33 is installed on one side of the two sliding frames 63 close to each other. A number of cleaning bristles are arranged on the inner circles of the two loop brush frames 64. The cleaning bristles on the two loop brush frames 64 contact the screen frame 33. A sliding rod 65 is rotatably installed on one side of the two sliding frames 63 away from each other. Each sliding rod 65 is slidably located in the hollow pipe 32. The ends of several sliding rods 65 on both sides away from each other are respectively connected to one side of the two connecting frames 62 close to each other.

[0037] After the screen frame 33 has been working for a period of time, impurities on the hot water will form scale on the screen frame 33, which will then block the screen frame 33, thereby reducing the air permeability and water permeability of the screen frame 33. At this time, the operator starts the telescopic rod of the electric push rod 61 to reciprocate, and the telescopic rod of the electric push rod 61 drives the two coupling frames 62 to move back and forth. The reciprocating movement of the two coupling frames 62 drives the slide bar 65, and the slide bar 63 and the return-shaped brush frame 64 move back and forth on the screen frame 33. The bristles on the return-shaped brush frame 64 can clean the impurities remaining on the screen frame 33, so that the screen frame 33 will not be blocked after being used for a long time, so that air and water vapor can smoothly pass through the screen frame 33, thereby further improving the heat exchange efficiency and effect of hot water; when the hollow tube 32 and the screen frame 33 swing, the slide bar 63 and the return-shaped brush frame 64 are driven to swing. Since the slide bar 65 is rotatably connected to the slide bar 63, the slide bar 65 will not swing with the swing of the slide bar 63 and the return-shaped brush frame 64.

[0038] Embodiment 3: Based on embodiment 2, Figures 7-12 As shown, it also includes a toggle mechanism, which is arranged on the hollow tube 32 and the slide 63. The toggle mechanism is used to toggle the filler in the net frame 33. The toggle mechanism includes a corrugated groove plate 71, a toggle rod 72 and a roller 73. A corrugated groove plate 71 is installed between the two slides 63 on each hollow tube 32 on the side close to each other. A corrugated groove is opened on the two corrugated groove plates 71. Each hollow tube 32 is slidably provided with a plurality of toggle rods 72 for toggling the filler in the net frame 33. Each toggle rod 72 is provided with a plurality of protrusions. A roller 73 is rotatably provided on the end of each toggle rod 72 close to the corrugated groove plate 71, and each roller 73 is located in the corrugated groove of the corrugated groove plate 71.

[0039] It also includes a cross bar 81 and a return spring 82. A cross bar 81 is fixedly installed between every two sliders 42. The four cross bars 81 slide through the two sides of the cooling box 2. A return spring 82 is connected between the four cross bars 81 and the side of the cooling box 2. The ends of the four cross bars 81 that are away from each other are in contact with the sides of the two connecting frames 62 that are close to each other.

[0040] It also includes a cleaning brush roller 91 and a transmission assembly 92. A cleaning brush roller 91 for cleaning the air inlet 23 is rotatably provided on both sides of the lower part of the cooling box 2 near the air inlet 23. A plurality of cleaning bristles are provided on the two cleaning brush rollers 91. A transmission assembly 92 is connected between one end of the cleaning brush roller 91 on the same side and one end of the rotating shaft 54 ​​on the same side.

[0041] Each transmission assembly 92 is composed of two pulleys and a flat belt. The two pulleys are connected to the cleaning brush roller 91 and the rotating shaft 54 ​​respectively, and a flat belt is wound between the two pulleys.

[0042] When the two sliding brackets 63 reciprocate, they drive the two corrugated groove plates 71 to reciprocate. Under the action of the corrugated grooves on the corrugated groove plates 71, the roller 73 can be driven to continuously reciprocate. The roller 73 drives the toggle rod 72 to continuously reciprocate. The protrusions on the toggle rod 72 will toggle the packing material in the screen frame 33, so that the packing materials can move and rub against each other, and then the scale between the packing materials can be loosened and dropped, thus preventing impurities in the hot water from forming scale between the packing materials and blocking the gaps between the packing materials, enabling air and water vapor to smoothly pass through the gaps between the packing materials, and further improving the heat exchange efficiency and effect of the hot water.

[0043] Initially, the two connecting brackets 62 respectively abut against the two cross bars 81 on the same side, and the four return springs 82 are in a compressed state. As the two connecting brackets 62 reciprocate, when the two connecting brackets 62 separate from the two cross bars 81 on the same side, under the action of the return springs 82, the four cross bars 81 on both sides will move in the direction away from each other. When the two connecting brackets 62 contact the two cross bars 81 on the same side, the two connecting brackets 62 will push the four cross bars 81 on both sides to move in the direction closer to each other, and the return springs 82 will be compressed accordingly. The four cross bars 81 on both sides will drive the four water distribution pipes 43 to move, thereby improving the uniformity of the hot water distribution on the packing material and further improving the cooling efficiency of the hot water.

[0044] When the two rotating shafts 54 rotate, they drive the two cleaning brush rollers 91 to rotate through the two transmission components 92. The cleaning bristles on the two cleaning brush rollers 91 can clean the air inlets 23 on both sides, preventing the air inlets 23 on both sides from being blocked by impurities in the air, so that the air inlets 23 remain unobstructed and dry air can smoothly pass through the air inlets 23 on both sides.

[0045] Those skilled in the art of this industry should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. An evaporative cooling device for a cooling tower, characterized in that: The invention comprises a base frame (1), a cooling box (2), an inspection door (21), a drain pipe (22), a water collector (24), an exhaust fan (25), a swing mechanism, a water distribution mechanism and a driving mechanism. The cooling box (2) is mounted on the base frame (1). A maintenance door (21) is mounted on one side of the cooling box (2). A drain pipe (22) is mounted on the bottom of the cooling box (2). The drain pipe (22) is connected to the cooling box (2). A plurality of air inlets (23) are provided on both sides of the cooling box (2). A water collector (24) is mounted on the top of the cooling box (2). An exhaust fan (25) is mounted above the cooling box (2). A plurality of swing mechanisms are evenly spaced in the cooling box (2). Fillers are mounted in the swing mechanisms. A water distribution mechanism is mounted on the cooling box (2). The water distribution mechanism is used to evenly distribute the liquid to be cooled. A driving mechanism is mounted on both sides of the cooling box (2). The driving mechanism is used to drive the swing mechanism to swing. The swing mechanism comprises a partition plate (31), a hollow tube (32) and a screen frame (33). Two partition plates (31) are installed in the cooling box (2). A plurality of hollow tubes (32) are evenly spaced and rotatably arranged between two opposite side surfaces of the cooling box (2). A screen frame (33) is installed in the middle of each hollow tube (32). Filling is filled in the screen frame (33). The water distribution mechanism comprises a water inlet pipe (41), a slider (42), a water distribution pipe (43) and a hose (44); four water inlet pipes (41) are evenly spaced and installed on the other two opposite sides of the cooling box (2); four sliders (42) are evenly spaced and slidably installed on both sides of the upper partition (31); a water distribution pipe (43) is installed between each two sliders (42) on different sides and located on the same straight line; a plurality of drainage holes are evenly spaced on the water distribution pipe (43); a hose (44) is connected between each water inlet pipe (41) and the water distribution pipe (43); and the water inlet pipe (41) and the water distribution pipe (43) are connected via the hose (44); The cleaning device also includes a cleaning mechanism, which is arranged on the cooling box (2), the hollow tube (32) and the screen frame (33). The cleaning mechanism is used to clean impurities on the screen frame (33). The cleaning mechanism includes an electric push rod (61), a coupling frame (62), a slide frame (63), a return brush frame (64) and a slide rod (65). Four electric push rods (61) are installed on the top of the cooling box (2). A coupling frame (62) is installed between two electric push rods (61) on the same side. Two slide frames (63) are slidably arranged on each hollow tube (32). The two slide frames (63) are connected to the cooling box (2). The frames (63) are symmetrically arranged, and a return brush frame (64) is installed on the side of the two slides (63) close to each other. The inner circles of the two return brush frames (64) are provided with a plurality of cleaning bristles, and the cleaning bristles on the two return brush frames (64) are in contact with the screen frame (33). A sliding rod (65) is rotatably installed on the side of the two slides (63) away from each other, and each sliding rod (65) is slidably located in the hollow tube (32), and the ends of the plurality of sliding rods (65) on both sides away from each other are respectively connected to the sides of the two coupling frames (62) close to each other; The invention also comprises a toggle mechanism, which is arranged on the hollow tube (32) and the slide (63), and is used to toggle the filler in the net frame (33). The toggle mechanism comprises a corrugated groove plate (71), a toggle rod (72) and a roller (73). A corrugated groove plate (71) is installed between the two slides (63) on each hollow tube (32) on the sides close to each other. A corrugated groove is formed on each of the two corrugated groove plates (71). A plurality of toggle rods (72) are slidably arranged on each hollow tube (32), and each toggle rod (72) is provided with a plurality of protrusions. A roller (73) is rotatably arranged on one end of each toggle rod (72) close to the corrugated groove plate (71), and each roller (73) is located in the corrugated groove of the corrugated groove plate (71). It also includes a cross bar (81) and a return spring (82), wherein a cross bar (81) is fixedly installed between every two sliders (42), and the four cross bars (81) are slidably passed through the two sides of the cooling box (2), and a return spring (82) is connected between the four cross bars (81) and the side of the cooling box (2), and the ends of the four cross bars (81) that are away from each other are in contact with the sides of the two coupling frames (62) that are close to each other.

2. An evaporative cooling device for a cooling tower according to claim 1, characterized in that: The driving mechanism comprises a gear (51), a rack (52), a motor (53), a rotating shaft (54), a bidirectional screw rod (55) and a bidirectional nut (56). A gear (51) is installed at both ends of each hollow tube (32). The gear (51) is located outside the cooling box (2). A rack (52) is slidably provided on two opposite outer surfaces of the cooling box (2). The rack (52) on the same side meshes with a plurality of gears (51) on the same side. A motor (53) is installed on two opposite outer surfaces of the cooling box (2). A rotating shaft (54) is rotatably provided on two opposite outer surfaces of the cooling box (2) via a bearing. One end of the rotating shaft (54) on the same side is connected to the output shaft of the motor (53) on the same side via a coupling. A bidirectional screw rod (55) is installed in the middle of the two rotating shafts (54). A bidirectional nut (56) is threadedly connected to the bidirectional screw rod (55). The bidirectional nut (56) on the same side is connected to the rack (52) on the same side.

3. An evaporative cooling device for a cooling tower as claimed in claim 2, characterized in that: It also includes a cleaning brush roller (91) and a transmission assembly (92). A cleaning brush roller (91) is rotatably provided on both sides of the lower part of the cooling box (2) near the air inlet (23). Both cleaning brush rollers (91) are provided with a plurality of cleaning bristles. A transmission assembly (92) is connected between one end of the cleaning brush roller (91) on the same side and one end of the rotating shaft (54) on the same side.

4. An evaporative cooling device for a cooling tower as claimed in claim 3, characterized in that: Each transmission assembly (92) is composed of two pulleys and a flat belt. The two pulleys are respectively connected to the cleaning brush roller (91) and the rotating shaft (54), and a flat belt is wound between the two pulleys.

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