Closed energy-saving cooling tower and water supply device thereof

Abstract

The invention discloses a closed type energy-saving cooling tower and a water supply device thereof, and relates to the technical field of cooling towers, the closed type energy-saving cooling tower comprises a tower body and an air draft assembly installed at the top of the tower body and used for sucking air into the tower body, and a water inlet pipe and a water outlet pipe are fixed to one side wall of the tower body; one end of the water inlet pipe and one end of the water outlet pipe extend into the tower body, a cooling assembly used for fluid heat dissipation is arranged between the water inlet pipe and the water outlet pipe and comprises a heat dissipation coil pipe installed at the top end in the tower body, and the two ends of the heat dissipation coil pipe are communicated with the water inlet pipe and the water outlet pipe respectively. A liquid level meter is used for monitoring the water amount in the water tank, a moving plate is driven to move in the water tank when the water amount is reduced to half, the moving plate is used for pushing a penetrating bent pipe in the water tank, and impurities in water are filtered through a filter screen in the bent pipe; meanwhile, water is added into the water tank through the second water injection pipe, the effects of automatic water adding and automatic impurity removing are achieved, labor is saved, and water in the water tank can be kept clean.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooling towers, in particular to a closed energy-saving cooling tower and a water supply device thereof. BACKGROUND

[0002] A cooling tower is a device that uses water as a circulating coolant to absorb heat from a system and discharge it to the atmosphere to reduce water temperature. The closed cooling tower is a transformation and development of the traditional cooling tower. It is actually a combination of evaporative cooling tower, cooler and wet cooling tower. It is a horizontal evaporative cooling tower. The process fluid flows through the pipe, and the air flows outside the pipe without contacting each other. The water in the water tank at the bottom of the tower is pumped by the circulating pump and sprayed uniformly outside the pipe. According to the principle of evaporative refrigeration, the effect of cooling the process fluid in the pipe is achieved. The closed cooling tower is suitable for various cooling systems with high requirements for circulating water quality, and has application prospects in power, chemical industry, steel, food and many industrial departments.

[0003] When the closed cooling tower is running, an air suction fan installed at the top is used to deliver air into the tower, and the gas entering the tower is used to accelerate the heat dissipation of the fluid in the heat dissipation pipe, as shown in the prior art with publication number CN113532149B and publication number CN116892839B. The fan at the top of the cooling tower not only sucks the air from the outside into the tower body, but also synchronously sucks the impurities carried in the air into the cooling tower. The impurities entering the tower body will be attached to the water droplets under the action of the tower spraying, and then fall into the water tank below the tower, causing the water in the water tank to be attached to a large amount of impurities, affecting the water quality, and additional manual cleaning of the impurities in the water tank is required. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a closed energy-saving cooling tower and a water supply device thereof. The water level in the water tank is monitored by a liquid level meter, and when the water level is reduced to half, the moving plate is driven to move inside the water tank. The moving plate pushes the water in the water tank through the elbow pipe, and the filter screen inside the elbow pipe filters the impurities in the water. At the same time, water is added to the water tank through the water injection pipe to achieve the effects of automatic water addition and automatic impurity removal, saving labor and helping to keep the water quality in the water tank clean.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows: a closed energy-saving cooling tower, comprising a tower body and an air suction assembly installed at the top of the tower body for sucking gas into the tower body, a water inlet pipe and a water outlet pipe are fixed on one side wall of the tower body, one end of the water inlet pipe and the water outlet pipe extends into the tower body, and a cooling assembly for heat dissipation of fluid is arranged between the water inlet pipe and the water outlet pipe;

[0006] The cooling assembly comprises a heat dissipation coil pipe installed at the top of the tower body, the two ends of the heat dissipation coil pipe are communicated with the water inlet pipe and the water outlet pipe respectively, a plurality of spray heads are arranged on the top of the heat dissipation coil pipe for spraying water downward, and a water tank is arranged at the bottom of the heat dissipation coil pipe, the water sprayed by the spray heads falls into the water tank;

[0007] The water tank is internally provided with a water tank impurity removal assembly for removing impurities in the water tank, and the water tank impurity removal assembly is arranged inside the tower body and extends out of the tower body;

[0008] The water tank impurity removal assembly comprises a water injection pipe two arranged on one side of the water tank, one end of the water injection pipe two is communicated with the inside of the water tank, the other end of the water injection pipe two penetrates through the side wall of the tower body and extends out of one side of the tower body, and an electromagnetic valve is fixed to the end of the water injection pipe two extending out of the tower body;

[0009] A moving plate is arranged on the side of the water tank close to the water injection pipe two, sealing strips are fixed to the bottom, front side and rear side of the moving plate, the three sealing strips are in contact with the inner wall of the water tank, two liquid level meters are installed in the moving plate, strip-shaped grooves are formed on the two sides of the moving plate, the two liquid level meters are arranged in the two strip-shaped grooves respectively, the liquid level height on the two sides of the moving plate is monitored, two bend pipes are communicated with the front side of the water tank, a one-way valve one allowing water to flow from left to right is fixed to the outer end of the left bend pipe, a U-shaped pipe is detachably connected between the two bend pipes, a filter screen is fixed to the inner end of the right bend pipe close to the U-shaped pipe, and the moving plate is driven by a driving mechanism to move in the water tank, the moving plate pushes the water on one side of the moving plate to flow to the other side of the moving plate through the bend pipes and the U-shaped pipe.

[0010] Preferably, the driving mechanism comprises two reciprocating lead screws, the two reciprocating lead screws are arranged on the two sides of the top of the moving plate and penetrate through two lead screw nuts fixed to the top of the moving plate, one end of each reciprocating lead screw is movably connected to one side wall in the tower body through a bearing, the other end of each reciprocating lead screw penetrates through the other side wall of the tower body and is movably connected to the other side wall through a bearing, a belt pulley is fixed to the end of each reciprocating lead screw extending out of the tower body, a belt is arranged between the two belt pulleys, one end of one reciprocating lead screw is fixed to a bevel gear one, a bevel gear two is engaged with the top end of the bevel gear one, and a motor two for driving the reciprocating lead screw to rotate is arranged at the top end of the bevel gear two.

[0011] The motor two is fixed to the side wall of the tower body through a support.

[0012] Preferably, the top end of the U-shaped pipe is inserted into the bottom end of each bend pipe, a threaded sleeve is threadedly connected to the outside of the bottom end of each bend pipe, and the threaded sleeve is threadedly connected to the top end of the U-shaped pipe, so as to install the U-shaped pipe at the bottom end of each bend pipe.

[0013] A switch valve is fixed to the end of each bend pipe close to the U-shaped pipe.

[0014] Preferably, the rear side of the water tank is communicated with a communication pipe, and a one-way valve two allowing water flow only from right to left is fixed to the right end of the communication pipe.

[0015] Preferably, the front side bottom and the rear side bottom of the tower body are both provided with through holes, and mesh plates are fixed in the through holes, and two spray heads two are arranged on the top of each mesh plate, and the two spray heads two are fixed in the front inner wall and the rear inner wall of the tower body through clamps, and two rows of water supply pipes three are communicated with the side of the heat dissipation coil of each spray head two, and the number of water supply pipes three in each row is multiple, and the water supply pipes three in the two rows are distributed upwards and downwards, and the water supply pipes three on the top are inclined upwards, and the water supply pipes three on the bottom are inclined downwards.

[0016] Preferably, the air draft assembly comprises a wind pipe fixed to the top of the tower body, the bottom end of the wind pipe is communicated with the inside of the tower body, a motor one is mounted in the wind pipe through a support, and a fan blade for air draft is fixed to the output end of the bottom of the motor one.

[0017] The application further provides a water supply device of the closed energy-saving cooling tower, which comprises a water pump arranged on one side of the tower body, a water suction pipe is communicated with the water suction opening of the water pump, one end of the water suction pipe extends into the inside of the water tank through the side wall of the tower body and the side wall of the water tank in sequence, a water injection pipe one is communicated with the water outlet of the water pump, a water supply pipe two is fixed and communicated with the top end of the water injection pipe one, the water supply pipe two is arranged at the top end of the inside of the tower body, and a plurality of water supply pipes one communicated with spray heads one are communicated with the outer end of the water supply pipe two.

[0018] One end of each of the two spray heads two is communicated with the water injection pipe one through the side wall of the tower body.

[0019] Preferably, a control box for controlling the wind pipe, the motor two, the electromagnetic valve and the water pump is arranged on one side of the tower body.

[0020] Compared with the prior art, the application provides a closed energy-saving cooling tower and a water supply device thereof, which has the following beneficial effects:

[0021] 1. In view of the problems of manual water adding and manual cleaning of the water tank in the prior art, the application uses a liquid level meter to monitor the water quantity in the water tank, and drives a moving plate to move in the water tank when the water quantity is reduced to half, so that the moving plate pushes the bent pipe in the water tank, the filter screen in the bent pipe filters impurities in the water, water is added to the water tank through the water injection pipe two, the effects of automatic water adding and automatic impurity cleaning are achieved, manual work is saved, and the water quality in the water tank is also kept clean.

[0022] 2. By setting a spray head two above two net plates inside the tower body respectively, and installing a row of water supply pipes three inclined upward and a row of water supply pipes three inclined downward on each spray head two respectively, the water sprayed upward in the water supply pipes three is contacted with the outer wall of the heat dissipation coil below to help it dissipate heat, so that the heat dissipation coil inside the tower body can be contacted with the sprayed water, thereby ensuring the heat dissipation effect;

[0023] The water sprayed downward in the water supply pipes three is beneficial to contact with the gas sucked into the tower body, and the impurities in the gas are settled in the water tank in advance, so as to avoid the impurities moving upward and adhering to the outer wall of the heat dissipation coil to affect heat dissipation. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a front view of the present application;

[0025] Figure 2 It is a left view of the present application;

[0026] Figure 3 It is a right view of the present application;

[0027] Figure 4 It is a rear view of the present application;

[0028] Figure 5 It is a schematic view of the internal structure of the tower body of the present application;

[0029] Figure 6 It is a top view of the water tank of the present application;

[0030] Figure 7 It is a schematic view of the structure of the moving plate and the liquid level meter of the present application;

[0031] Figure 8 It is a schematic view of the structure of the bend pipe and the water tank of the present application;

[0032] Figure 9 It is an exploded view of the bend pipe and the U-shaped pipe of the present application;

[0033] Figure 10 It is a schematic view of the structure of the filter screen and the bend pipe of the present application.

[0034] In the drawings:

[0035] 1 tower body, 2 through hole, 3 net plate, 4 water inlet pipe, 5 water outlet pipe;

[0036] 6 air suction fan assembly, 61 air cylinder, 62 fan blade, 63 motor one;

[0037] 7 cooling assembly, 71 heat dissipation coil, 72 spray head one, 73 water supply pipe one, 74 water supply pipe two, 75 water injection pipe one, 76 water pump, 77 water suction pipe, 78 water tank, 79 spray head two, 710 water supply pipe three;

[0038] 8 water tank impurity removal assembly, 81 water injection pipe two, 82 moving plate, 83 liquid level meter, 84 strip-shaped groove, 85 rubber strip, 86 reciprocating wire rod, 87 bevel gear one, 88 bevel gear two, 89 motor two, 810 belt pulley, 811 belt, 812 elbow, 813 one-way valve one, 814 on-off valve, 815 U-shaped pipe, 816 threaded sleeve, 817 filter screen, 818 communication pipe, 819 one-way valve two, 820 electromagnetic valve;

[0039] 9 control box. DETAILED DESCRIPTION

[0040] In order to make the technical personnel in the art better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0041] As Figures 1-5 shown, the present application provides a closed energy-saving cooling tower, comprising a tower body 1, the tower body 1 front side bottom and rear side bottom are provided with through holes 2, the through holes 2 are fixed with mesh plates 3 inside, a draft assembly 6 for sucking gas into the tower body 1 is installed at the top of the tower body 1, specifically, the draft assembly 6 comprises a wind drum 61 fixed at the top of the tower body 1, the bottom end of the wind drum 61 is communicated with the inside of the tower body 1, a motor one 63 is installed inside the wind drum 61 through a support, and a fan blade 62 for draft is fixed at the output end of the bottom of the motor one 63, when the present application is running, the motor one 63 is started; the motor one 63 can drive the fan blade 62 to rotate to realize the effect of sucking air into the tower body 1.

[0042] A water inlet pipe 4 and a water outlet pipe 5 are fixed on one side wall of the tower body 1, the fluid to be cooled enters into the inside of the tower body 1 through the water inlet pipe 4, and then the cooled fluid is discharged through the water outlet pipe 5, in order to cool the fluid, the water inlet pipe 4 and the water outlet pipe 5 are extended into the inside of the tower body 1 at one end, and a cooling assembly 7 for heat dissipation of the fluid is arranged between the water inlet pipe 4 and the water outlet pipe 5;

[0043] Further, as Figure 2 and 5 shown, the cooling assembly 7 comprises a heat dissipation coil pipe 71 installed at the top end inside the tower body 1, the heat dissipation coil pipe 71 is communicated with the water inlet pipe 4 and the water outlet pipe 5 at both ends respectively, and a plurality of water jet nozzles one 72 for downward water spraying are arranged at the top of the heat dissipation coil pipe 71, the fluid enters into the heat dissipation coil pipe 71 through the water inlet pipe 4 and flows in the heat dissipation coil pipe 71, the water sprayed by the water jet nozzles one 72 falls on the outer end of the heat dissipation coil pipe 71 in the flowing process, the evaporation refrigeration principle of water is utilized to help the fluid in the heat dissipation coil pipe 71 to cool down, and the gas sucked into the tower body 1 by the draft assembly 6 also helps to accelerate the evaporation speed of water, so that the cooling effect can be enhanced;

[0044] asFigure 5 As shown, the heat dissipation coil 71 in the application is in the form of multiple layers and is coiled at the top end inside the tower body 1, and the heat dissipation coil 71 at the bottom is easily blocked by the heat dissipation coil 71 at the top, so that the water sprayed by the spray head one 72 cannot fall on the heat dissipation coil 71 at the bottom. To solve this problem, the application is provided with a spray head two 79 on the top of each of the two mesh plates 3, and the two spray head two 79 are fixed on the front and rear inner walls of the tower body 1 by a clamp, and the side of the two spray head two 79 facing the heat dissipation coil 71 is communicated with two rows of water supply pipes three 710, and the number of each row of water supply pipes three 710 is multiple, and the two rows of water supply pipes three 710 are distributed above and below, the water supply pipe three 710 at the top is inclined upward, and the water supply pipe three 710 at the bottom is inclined downward, wherein the water sprayed by the upward inclined water supply pipe three 710 can contact the heat dissipation coil 71 at the bottom to ensure its heat dissipation effect;

[0045] The water sprayed by the downward inclined water supply pipe three 710 can contact the gas entering the tower body 1 from the mesh plate 3, so that the impurities in the gas can be separated from the gas under the adsorption of water droplets, so as to prevent the impurities from adhering to the outer wall of the heat dissipation coil 71 and affecting the heat dissipation.

[0046] To collect the water sprayed, a water tank 78 is arranged at the bottom of the heat dissipation coil 71, and the water sprayed by the spray head one 72 falls into the water tank 78, and the water tank 78 is filled with water itself to supply water to the spray head one 72 and the water supply pipe three 710, as shown in Figure 2 、 5 As shown in Figs. 1-6, the cooling tower water supply device is arranged on one side of the tower body 1, which comprises a water pump 76 arranged on one side of the tower body 1, and the water suction pipe 77 is communicated with the water suction port of the water pump 76, one end of the water suction pipe 77 extends into the water tank 78 through the side wall of the tower body 1 and the side wall of the water tank 78 in sequence, the water outlet of the water pump 76 is communicated with the water injection pipe one 75, the top end of the water injection pipe one 75 is fixedly communicated with the water supply pipe two 74, the water supply pipe two 74 is arranged at the top end inside the tower body 1, the outer end of the water supply pipe two 74 is communicated with a plurality of water supply pipes one 73 communicated with the spray head one 72, and one end of the two spray head two 79 is communicated with the water injection pipe one 75 through the side wall of the tower body 1;

[0047] By starting the water pump 76, the water in the water tank 78 can be pumped by the water pump 76, and then the water is delivered to the water supply pipe two 74, the water supply pipe one 73 and the spray head two 79 through the water injection pipe one 75, and then the water is sprayed through the spray head one 72 and the water supply pipe three 710 to realize the water supply for the spray head one 72 and the water supply pipe three 710.

[0048] In addition, the impurities adsorbed by the water droplets sprayed by the water supply pipe 710 and the nozzle 72 will fall into the water tank 78 along with the water droplets. In order to remove the impurities inside the water tank 78, a water tank cleaning component 8 for cleaning the impurities inside the water tank 78 is provided inside the water tank 78. The water tank cleaning component 8 is located inside the tower body 1 and extends out of the tower body 1.

[0049] Specifically, such as Figures 2-10 As shown, the water tank cleaning assembly 8 includes a water injection pipe 81 located on one side of the water tank 78. One end of the water injection pipe 81 is connected to the inside of the water tank 78, and the other end of the water injection pipe 81 passes through the side wall of the tower body 1 and extends out of one side of the tower body 1. A solenoid valve 820 is fixed to the end of the water injection pipe 81 that extends out of the tower body 1. Water can be injected into the water tank 78 through the water injection pipe 81.

[0050] Furthermore, a movable plate 82 is provided inside the water tank 78 near the second water injection pipe 81. Sealing strips 85 are fixed to the bottom, front and rear sides of the movable plate 82. All three sealing strips 85 are in contact with the inner wall of the water tank 78. Two level gauges 83 are installed inside the movable plate 82. Strip grooves 84 are opened on both sides of the movable plate 82. The top of the strip grooves 84 is flush with the original liquid level. The two level gauges 83 are located inside the two strip grooves 84 respectively and are used to monitor the liquid level on both sides of the movable plate 82. Two bent pipes 812 are connected to the front of the water tank 78. A U-shaped pipe 815 is detachably connected between the two bent pipes 812. A filter screen 817 is fixed inside the end of the bent pipe 812 on the right side near the U-shaped pipe 815.

[0051] When the level gauge 83 detects that the liquid level inside the water tank 78 has dropped to half of the initial level, the drive mechanism will drive the moving plate 82 to move to the left inside the water tank 78. During the movement, the water injection pipe 81 injects water into the water tank 78. At the same time, the moving plate 82 pushes the water on one side of the moving plate 82 through the bend pipe 812 and the U-shaped pipe 815 to flow to the other side of the moving plate 82. Moreover, a one-way valve 813 that only allows water to flow from left to right is fixed to the outer end of the bend pipe 812 on the left side. Therefore, the water flow direction in the bend 812 is from left to right. It will first flow into the bend 812 on the left, pass through the U-shaped pipe 815, and then flow into the bend 812 on the right. Then it will flow back into the water tank 78 through the bend 812 on the right. During the flow, the filter screen 817 will filter out the impurities in the water flow. These impurities will accumulate inside the U-shaped pipe 815 until the moving plate 82 moves to the left side inside the water tank 78. Then the water in the water tank 78 can be fully filtered to ensure water quality.

[0052] To facilitate the removal of impurities from the U-shaped tube 815, the U-shaped tube 815 needs to be removed from between the two bends 812, such as... Figure 9 and 10As shown, a switch valve 814 is fixed at one end of each of the two bends 812 near the U-shaped tube 815. Before disassembling the U-shaped tube 815, the switch valve 814 needs to be closed to prevent water from leaking out of the water tank 78. In addition, the top of the U-shaped tube 815 is inserted into the bottom of the two bends 812 respectively. The bottom of each of the two bends 812 is threaded with a threaded sleeve 816. The threaded sleeve 816 is threaded to the top of the U-shaped tube 815. When disassembling, simply rotate the threaded sleeve 816 to turn it out from the bottom of the bend 812, and the U-shaped tube 815 can be removed from the bottom of the bend 812. Then, people can pour out the impurities accumulated in the U-shaped tube 815 to complete the impurity removal.

[0053] After the movable plate 82 moves to the left side inside the water tank 78, it will immediately move to the right, as follows: Figure 7 As shown, a connecting pipe 818 is connected to the rear side of the water tank 78. A one-way valve 819 that only allows water to flow from right to left is fixed at the right end of the connecting pipe 818. When the moving plate 82 moves to the right, it will push the water on the right side through the connecting pipe 818 to the left side of the moving plate 82 until the moving plate 82 is reset.

[0054] Furthermore, the driving mechanism in this invention includes two reciprocating lead screws 86. The two reciprocating lead screws 86 are located on both sides of the top of the moving plate 82 and pass through two lead screw nuts installed at the top of the moving plate 82 respectively. One end of the two reciprocating lead screws 86 is movably connected to one side wall inside the tower body 1 through a bearing. The other end of the reciprocating lead screws 86 passes through the other side wall of the tower body 1 and is movably connected to the other side wall through a bearing. One end of each of the two reciprocating lead screws 86 extending outside the tower body 1 is fixed with a pulley 810. A belt 811 is between the two pulleys 810. One end of one of the reciprocating lead screws 86 is fixed with a bevel gear 87. The top of the bevel gear 87 meshes with a bevel gear 88. The top of the bevel gear 88 is provided with a motor 89 that drives the reciprocating lead screw 86 to rotate. The motor 89 is fixed to the side wall of the tower body 1 by a bracket.

[0055] Furthermore, a control box 9 is located on one side of the tower body 1 to control the ventilation duct 61, motor 89, solenoid valve 820, and water pump 76. The water level information monitored by the level gauge 83 is directly sent to the control box 9 for processing. When the control box 9 detects that the liquid level inside the water tank 78 has dropped to half, it controls the solenoid valve 820 to open and automatically inject water into the water tank 78 through the water injection pipe 81. At the same time, the motor 89 is started, and then the two reciprocating screws 86 are driven by the bevel gear 88, bevel gear 87, pulley 810, and belt 811 to move the moving plate 82 inside the water tank 78. When the moving plate 82 moves to the middle position inside the water tank 78, the level gauge 83 detects that the liquid level on both sides is at the initial height. At this time, the control box 9 controls the solenoid valve 820 to close, and then the motor 89 continues to run, driving the moving plate 82 to move until the moving plate 82 resets and stops. The specific circuit structure for implementing the above control process is a prior art solution and will not be described further here.

[0056] 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 the claimed invention.

Claims

1. A closed-loop energy-saving cooling tower, comprising a tower body (1) and an exhaust assembly (6) installed at the top of the tower body (1) for drawing gas into the tower body (1), characterized in that: A water inlet pipe (4) and a water outlet pipe (5) are fixed on one side wall of the tower body (1). One end of the water inlet pipe (4) and the water outlet pipe (5) extend into the interior of the tower body (1), and a cooling component (7) for dissipating heat from the fluid is provided between the water inlet pipe (4) and the water outlet pipe (5). The cooling assembly (7) includes a heat dissipation coil (71) installed at the top of the tower body (1). The two ends of the heat dissipation coil (71) are connected to the water inlet pipe (4) and the water outlet pipe (5) respectively. The top of the heat dissipation coil (71) is provided with multiple nozzles (72) for spraying water downwards. The bottom of the heat dissipation coil (71) is provided with a water tank (78). The water sprayed by the nozzles (72) falls into the water tank (78). The water tank (78) is equipped with a water tank cleaning component (8) for cleaning impurities inside the water tank (78). The water tank cleaning component (8) is located inside the tower body (1) and extends out of the tower body (1). The water tank cleaning assembly (8) includes a second water injection pipe (81) located on one side of the water tank (78). One end of the second water injection pipe (81) is connected to the inside of the water tank (78), and the other end of the second water injection pipe (81) passes through the side wall of the tower body (1) and extends out of one side of the tower body (1). A solenoid valve (820) is fixed at one end of the second water injection pipe (81) extending out of the tower body (1). Inside the water tank (78), near the second water inlet pipe (81), there is a movable plate (82). Sealing strips (85) are fixed to the bottom, front, and rear of the movable plate (82). All three sealing strips (85) are in contact with the inner wall of the water tank (78). Two level gauges (83) are installed inside the movable plate (82). Strip grooves (84) are respectively opened on both sides of the movable plate (82), and the two level gauges (83) are located inside the two strip grooves (84) to monitor the liquid level on both sides of the movable plate (82). The front of the water tank (78) is connected to two curved pipes (…). 812), the outer end of the bend (812) on the left is fixed with a one-way valve (813) that only allows water to flow from left to right. A U-shaped pipe (815) is detachably connected between the two bends (812). A filter screen (817) is fixed inside the bend (812) on the right near the U-shaped pipe (815). The moving plate (82) is driven by a drive mechanism to move inside the water tank (78). The moving plate (82) pushes the water on one side of the moving plate (82) through the bend (812) and the U-shaped pipe (815) to the other side of the moving plate (82).

2. The closed-loop energy-saving cooling tower according to claim 1, characterized in that: The driving mechanism includes two reciprocating screws (86), which are located on both sides of the top of the moving plate (82) and pass through two screw nuts installed at the top of the moving plate (82). One end of the two reciprocating screws (86) is movably connected to one side wall inside the tower body (1) through a bearing. The other end of the reciprocating screws (86) passes through the other side wall of the tower body (1) and is movably connected to the other side wall through a bearing. One end of the two reciprocating screws (86) extending outside the tower body (1) is fixed with a pulley (810). There is a belt (811) between the two pulleys (810). One end of one of the reciprocating screws (86) is fixed with a bevel gear (87). The top of the bevel gear (87) meshes with a bevel gear (88). The top of the bevel gear (88) is provided with a motor (89) that drives the reciprocating screw (86) to rotate. The second motor (89) is fixed to the side wall of the tower body (1) by a bracket.

3. A closed-loop energy-saving cooling tower according to claim 1, characterized in that: The top end of the U-shaped tube (815) is inserted into the bottom end of two bends (812), and the bottom ends of the two bends (812) are threaded with threaded sleeves (816). The threaded sleeves (816) are threaded to the top end of the U-shaped tube (815) and are used to install the U-shaped tube (815) at the bottom end of the two bends (812). Two bends (812) are each fixed with a switch valve (814) at the end near the U-shaped tube (815).

4. A closed-loop energy-saving cooling tower according to claim 1, characterized in that: The water tank (78) is connected to a connecting pipe (818) at the rear, and a one-way valve (819) is fixed at the right end of the connecting pipe (818) that only allows water to flow from right to left.

5. A closed-loop energy-saving cooling tower and its water supply device according to claim 1, characterized in that: The tower body (1) has through holes (2) at the bottom front and bottom rear sides. A mesh plate (3) is fixed inside the through hole (2). The top of the two mesh plates (3) is equipped with nozzles (79). The two nozzles (79) are fixed to the front wall and the rear wall inside the tower body (1) by clamps. The two nozzles (79) are connected to two rows of water supply pipes (710) on the side facing the heat dissipation coil (71). The number of each row of water supply pipes (710) is set to multiple. The two rows of water supply pipes (710) are distributed vertically. The water supply pipes (710) located above are inclined upwards, and the water supply pipes (710) located below are inclined downwards.

6. A closed-loop energy-saving cooling tower according to claim 1, characterized in that: The ventilation assembly (6) includes a duct (61) fixed to the top of the tower body (1). The bottom end of the duct (61) is connected to the inside of the tower body (1). A motor (63) is installed inside the duct (61) via a bracket. A fan blade (62) for ventilation is fixed to the output end of the bottom of the motor (63).

7. The water supply device for the closed-loop energy-saving cooling tower according to any one of claims 1-6, characterized in that: The system includes a water pump (76) located on one side of the tower body (1). The water pump (76) has a water inlet connected to a water pump pipe (77). One end of the water pump pipe (77) passes through the side wall of the tower body (1) and the side wall of the water tank (78) and extends into the interior of the water tank (78). The water pump (76) has an outlet connected to a water injection pipe (75). The top end of the water injection pipe (75) is fixedly connected to a water supply pipe (74). The water supply pipe (74) is located at the top inside the tower body (1). The outer end of the water supply pipe (74) is connected to multiple water supply pipes (73) that are connected to the nozzle (72). Both nozzles (79) have one end that passes through the side wall of the tower body (1) and is connected to the water injection pipe (75).

8. The water supply device for a closed-loop energy-saving cooling tower according to claim 7, characterized in that: The tower body (1) is provided with a control box (9) on one side for controlling the air duct (61), motor 2 (89), solenoid valve (820) and water pump (76).

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