Cooling tower and steam drainage cooling system

Abstract

The invention relates to a cooling tower and a steam drainage cooling system.The cooling tower comprises a tower body, an opening is formed in the bottom of the tower body, an air outlet is formed in the top of the tower body, a liquid outlet part is arranged on the upper portion of the tower body and used for introducing liquid to be cooled into the tower body, and a ventilator is installed at the top of the tower body and used for ventilating the liquid to be cooled into the tower body; the ventilator comprises a ventilator shaft and ventilator blades installed on the ventilator shaft, the ventilator blades are located in the tower body and used for generating airflow flowing from the opening to the air outlet, the driving mechanism comprises a driving shaft, an impeller and a transmission assembly, and the driving shaft is rotatably arranged in the tower body; the impeller is arranged on the driving shaft in a sleeving mode, blades of at least part of the impeller are located below the liquid outlet part so that the impeller can rotate under the impact of the liquid to be cooled and drive the driving shaft to rotate, and the driving shaft is in transmission connection with the ventilator shaft through the transmission assembly. The cooling tower can drive the ventilator to operate to cool the liquid to be cooled by utilizing the impact force of the liquid to be cooled.

Description

Technical Field

[0001] The present disclosure relates to the technical field of cooling towers, and in particular to a cooling tower and a steam drain cooling system. Background Art

[0002] After the steam heater heats the air or liquid, the discharged steam trap still has a relatively high temperature. If it is discharged directly into the sump, it will cause problems such as reduced sump life and severe vibration caused by cavitation of the trap pump.

[0003] A cooling tower is a device that uses air as a coolant, absorbs heat from a system and discharges the heat into the atmosphere to reduce the water temperature. In the related art, cooling towers are usually used as steam drain cooling devices, but the cooling towers in the related art generally use electric energy to drive the fan, and need to introduce components such as motors, cables, and control systems, which have complex structures and require electricity consumption. Summary of the invention

[0004] The purpose of the present invention is to provide a cooling tower and a steam drain cooling system to solve the technical problems existing in the related art.

[0005] In order to achieve the above objectives, in a first aspect, the present disclosure provides a cooling tower, comprising: A tower body, wherein an opening is formed at the bottom of the tower body, an air outlet is formed at the top of the tower body, and a liquid outlet is provided at the upper part of the tower body, wherein the liquid outlet is used to pass the liquid to be cooled into the interior of the tower body; A fan is mounted on the top of the tower body, the fan comprising a fan shaft and fan blades mounted on the fan shaft, the fan blades are located inside the tower body and are used to generate an airflow from the opening to the air outlet; The driving mechanism includes a driving shaft, an impeller and a transmission assembly. The driving shaft is rotatably arranged inside the tower body. The impeller is sleeved on the driving shaft and at least part of the impeller's blades are located below the liquid outlet, so that the impeller can rotate under the impact of the liquid to be cooled and drive the driving shaft to rotate. The driving shaft is connected to the fan shaft through the transmission assembly.

[0006] Optionally, the transmission member includes a first pulley, a second pulley, a belt and a driven shaft, the driven shaft is rotatably arranged on the top of the tower body and is drivingly connected to the fan shaft, the first pulley is sleeved on the driving shaft, the second pulley is sleeved on the driven shaft, and the belt is wound around the first pulley and the second pulley.

[0007] Optionally, the driving mechanism further comprises a protective cover mounted on the tower body, and the first pulley, the second pulley and the belt are all located in the protective cover.

[0008] Optionally, the driven shaft extends in a horizontal direction, the fan shaft extends in a vertical direction, the transmission assembly further comprises a worm wheel and a worm, the worm wheel is connected to the driven shaft, and the worm is connected to the fan shaft.

[0009] Optionally, the cooling tower also includes an infusion pipe, at least part of which is located inside the tower body, the liquid outlet is a water outlet of the infusion pipe close to the impeller, the axis of the water outlet extends in a vertical direction, and the blades of the impeller extend radially along the driving shaft.

[0010] Optionally, a flow regulating valve is provided on the infusion tube, and the flow regulating valve is used to control the flow rate of the liquid to be cooled passing through the infusion tube.

[0011] Optionally, the cooling tower also includes a bearing seat, a bearing and a seal, the bearing seat is located outside the tower body and connected to the outer wall of the tower body, a through hole is formed on the tower body, the end of the driving shaft passes through the through hole and is installed on the bearing seat through the bearing, and the seal is located inside the tower body and is used to seal the through hole.

[0012] Optionally, the cooling tower further includes a distribution plate and an inclined plate, wherein there are multiple distribution plates, and the multiple distribution plates are spaced apart inside the tower body, and multiple spaced inclined plates are arranged between each adjacent two distribution plates, and each distribution plate is formed with distribution holes for the liquid to be cooled to pass through, and a flow channel is defined between each adjacent two inclined plates so that the distribution holes on the two adjacent distribution plates can be connected through the flow channel.

[0013] Optionally, the plurality of distribution plates include a first distribution plate and a second distribution plate, the first distribution plate is located above the second distribution plate, and the aperture of the distribution holes on the first distribution plate is larger than the aperture of the distribution holes on the second distribution plate.

[0014] In a second aspect, the present disclosure provides a steam drain cooling system, comprising a steam drain delivery pipe, a water collecting trough, a drain pipe and the above-mentioned cooling tower, wherein the steam drain delivery pipe is connected to the liquid outlet, the water collecting trough is located at the bottom of the cooling tower, the projection of the opening along the vertical direction is located in the water collecting trough, one end of the drain pipe is connected to the water collecting trough, and the other end of the drain pipe is used to connect to a water storage tank.

[0015] Through the above technical solution, since an impeller is arranged below the liquid outlet, and the impeller is connected to the fan shaft through the driving shaft and the transmission assembly, the cooling tower provided by the present disclosure can generate an airflow for heat exchange with the liquid to be cooled by converting the kinetic energy of the liquid to be cooled into mechanical energy to drive the fan without introducing an additional power source (such as wind energy), thereby realizing cooling and cooling of the liquid to be cooled. Compared with the motor, cable, control system and other components introduced for the fan in the related art, the cooling tower provided by the present disclosure can achieve the purpose of saving energy and reducing the structural complexity of the cooling tower while realizing the cooling of the liquid to be cooled, and avoids the risks of poor contact, leakage and other problems that may be caused by the motor and other components in the related art in the humid environment of the cooling tower, effectively reducing the safety hazards. In addition, the liquid to be cooled falls into the water collection tank after cooling, which can reduce the hidden dangers of water hammer and pump cavitation caused by the excessively high medium temperature in the water collection tank and the water pump, effectively ensure the operation safety of the cooling tower, and improve the service life of the equipment. Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a three-dimensional schematic diagram of a steam drain cooling system provided by an exemplary embodiment of the present disclosure; Figure 2 is a cross-sectional schematic diagram of a steam drain cooling system provided by an exemplary embodiment of the present disclosure, wherein a protective cover is not shown; Figure 3 is a schematic diagram of a partial cross-section of a cooling tower provided by an exemplary embodiment of the present disclosure, wherein a protective cover is not shown; Figure 4 The schematic diagram of a partial cross-section of a cooling tower provided by an exemplary embodiment of the present disclosure, wherein the cross-section position is Figure 3 different; Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0017] Description of Reference Numerals 100-steam drain cooling system; 1-cooling tower; 11-tower body; 12-opening; 13-air outlet; 14-liquid outlet; 15-infusion pipe; 151-flow regulating valve; 16-distribution plate; 161-distribution hole; 162-first distribution plate; 163-second distribution plate; 17-inclined plate; 171-flow channel; 2-ventilator; 21-ventilator shaft; 22-ventilator blades; 3-driving mechanism; 31-driving shaft; 32-impeller; 33-transmission assembly; 331-first pulley; 332-second pulley; 333-belt; 334-driven shaft; 335-protective cover; 336-worm wheel; 337-worm; 4-bearing seat; 5-seal; 6-water collecting trough; 7-drain pipe. DETAILED DESCRIPTION

[0018] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0019] It should be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it can be directly on the other element or indirectly on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0020] In the present disclosure, unless otherwise stated, the directional words used, such as "upper, lower, top, bottom", are usually defined as "upper, lower, top, bottom" of the cooling tower in normal use, and are only for the convenience of describing the present disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. "Inside and outside" refer to the inside and outside of the contour of the corresponding component. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements; for ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0022] See also Figure 1-Figure 5According to a first aspect of the present disclosure, the present disclosure provides a cooling tower 1 , comprising a tower body 11 , a ventilator 2 and a driving mechanism 3 . An opening 12 is formed at the bottom of the tower body 11, an air outlet 13 is formed at the top of the tower body 11, and a liquid outlet 14 is provided at the upper part of the tower body 11, and the liquid outlet 14 is used to pass the liquid to be cooled into the interior of the tower body 11; the fan 2 is installed at the top of the tower body 11, and the fan 2 includes a fan shaft 21 and a fan blade 22 installed on the fan shaft 21, and the fan blade 22 is located inside the tower body 11 and is used to generate an airflow from the opening 12 to the air outlet 13; the driving mechanism 3 includes a driving shaft 31, an impeller 32 and a transmission assembly 33, the driving shaft 31 is rotatably arranged inside the tower body 11, the impeller 32 is sleeved on the driving shaft 31 and at least part of the blades of the impeller 32 are located below the liquid outlet 14, so that the impeller 32 can rotate under the impact of the liquid to be cooled and drive the driving shaft 31 to rotate, and the driving shaft 31 is connected to the fan shaft 21 through the transmission assembly 33.

[0023] When it is necessary to cool the liquid to be cooled by the above-mentioned cooling tower 1, the liquid to be cooled can be passed into the tower body 11 through the liquid outlet 14 on the upper part of the tower body 11, and impact the blades of the impeller 32 arranged below the liquid outlet 14, thereby driving the impeller 32 to rotate, and the impeller 32 drives the driving shaft 31 to rotate, and the driving shaft 31 drives the fan shaft 21 to rotate synchronously through the transmission assembly 33, and the fan shaft 21 drives the fan blades 22 extending into the tower body 11 to rotate, thereby sucking the airflow from the opening 12 at the bottom of the tower body 11, and the liquid to be cooled forms droplets after impacting the blades of the impeller 32. The falling droplets will contact the rising airflow inside the tower body 11, and heat exchange is completed during the contact process. After the heat exchange is realized, the airflow is discharged from the air outlet 13 at the top of the tower body 11, and the liquid to be cooled is discharged from the opening 12 at the bottom of the tower body 11, thereby completing the cooling of the liquid to be cooled.

[0024] Through the above technical solution, since an impeller 32 is provided below the liquid outlet 14, and the impeller 32 is connected to the fan shaft 21 through the driving shaft 31 and the transmission assembly 33, the cooling tower 1 provided by the present disclosure can generate an airflow for heat exchange with the liquid to be cooled by converting the kinetic energy of the liquid to be cooled into mechanical energy for driving the fan 2 to operate without introducing an additional power source (such as wind energy), thereby realizing cooling and cooling of the liquid to be cooled. Compared with the motor, cable, control system and other components introduced for the fan in the related art, the cooling tower 1 provided by the present disclosure can achieve the purpose of saving energy and reducing the structural complexity of the cooling tower 1 while realizing the cooling of the liquid to be cooled, and avoids the risks of poor contact, leakage and other problems that may be caused by the motor and other components in the related art in the humid environment of the cooling tower 1, effectively reducing safety hazards. In addition, the liquid to be cooled after cooling falls into the water collection tank, which can reduce the hidden dangers of water hammer, pump cavitation and the like caused by the excessively high medium temperature in the water collection tank and the water pump, effectively ensure the operation safety of the cooling tower 1, and improve the service life of the equipment. It should be noted that the above-mentioned liquid to be cooled may include a pure liquid medium or a mixed medium of vapor and liquid. For example, in the present disclosure, the liquid to be cooled may be a steam trap, which is passed into the interior of the tower body 11 from the liquid outlet 14 of the tower body 11. It has been verified that the flow rate of the steam trap is 3 m / s-6 m / s, that is, the steam trap has sufficient kinetic energy. After the steam trap impacts the blades of the impeller 32, the driving shaft 31 can be rotated to drive the fan 2 to run, thereby sucking the airflow from the bottom of the tower body 11, exchanging heat with the steam trap, and cooling the steam trap.

[0025] Here, the impeller 32 is sleeved on the driving shaft 31 and at least part of the blades of the impeller 32 are located below the liquid outlet 14. The present disclosure does not limit the specific position of the impeller 32. For example, the impeller 32 can be set directly below the liquid outlet 14, or it can be set obliquely below the liquid outlet 14, as long as it is ensured that the steam drainage can impact the blades of the impeller 32 and drive the driving shaft 31 to rotate, thereby driving the fan 2 to generate airflow for heat exchange.

[0026] See also Figure 2-Figure 5In one embodiment of the present disclosure, the transmission assembly 33 may include a first pulley 331, a second pulley 332, a belt 333 and a driven shaft 334. The driven shaft 334 is rotatably arranged at the top of the tower body 11 and is in transmission connection with the fan shaft 21. The first pulley 331 is sleeved on the driving shaft 31, the second pulley 332 is sleeved on the driven shaft 334, and the belt 333 is wound around the first pulley 331 and the second pulley 332. The first pulley 331 on the driving shaft 31 can drive the second pulley 332 on the driven shaft 334 to rotate synchronously through the belt 333, and one end of the driven shaft 334 is in transmission connection with the fan shaft 21, so as to drive the fan blades 22 to generate airflow for cooling the liquid to be cooled. In this way, the kinetic energy of the steam drainage is converted into mechanical energy for driving the fan 2 to operate, thereby achieving cooling of the liquid to be cooled.

[0027] Optionally, the driven shaft 334 may be arranged in parallel with the driving shaft 31 , and the driven shaft 334 may be rotatably disposed on the top of the tower body 11 .

[0028] Optionally, the first pulley 331 and the second pulley 332 can be set to two grooves or four grooves, etc., and the diameter ratio of the second pulley 332 to the first pulley 331 can be 1:1, 1:1.5, 1:2, etc., which is not limited in the present disclosure and is based on the improvement of transmission efficiency.

[0029] Optionally, the first pulley 331 and the driving shaft 31 , and the second pulley 332 and the driven shaft 334 may be connected and fixed in any manner, such as a key connection or a locking sleeve connection, which is not limited in the present disclosure.

[0030] In another embodiment of the present disclosure, the transmission assembly 33 may further include a first sprocket, a second sprocket, a chain and a driven shaft 334, the first sprocket is sleeved on the driving shaft 31, the second sprocket is sleeved on the driven shaft 334, and the chain is wound around the first sprocket and the second sprocket, that is, the pulley drive is replaced by the sprocket drive, so as to realize the conversion of the kinetic energy of the liquid to be cooled into mechanical energy for driving the fan 2 to operate, thereby completing the cooling of the steam drain.

[0031] In other embodiments of the present disclosure, meshing gears may be provided on the driving shaft 31 and the driven shaft 334 , and the kinetic energy of the liquid to be cooled may be converted into mechanical energy for driving the fan 2 to operate through gear transmission.

[0032] See also Figure 4-Figure 5In order to prevent the transmission component 33 from being affected by the liquid to be cooled, the driving mechanism 3 may further include a protective cover 335 installed on the tower body 11, and the first pulley 331, the second pulley 332 and the belt 333 are all located inside the protective cover 335. In this way, the first pulley 331, the second pulley 332 and the belt 333 are all arranged inside the protective cover 335, so that the first pulley 331, the second pulley 332 and the belt 333 are isolated from the liquid to be cooled (such as steam trap), ensuring the stable operation of the transmission component 33, and preventing the liquid to be cooled from staying on the first pulley 331, the second pulley 332 and the belt 333, affecting the transmission efficiency or reducing the service life of the pulley and the belt 333.

[0033] See also Figure 2-Figure 5 In one embodiment of the present disclosure, the driven shaft 334 extends in a horizontal direction, the fan shaft 21 extends in a vertical direction, and the transmission assembly 33 also includes a worm gear 336 and a worm 337, the worm gear 336 is connected to the driven shaft 334, and the worm 337 is connected to the fan shaft 21.

[0034] The driven shaft 334 can extend in the horizontal direction and be parallel to the driving shaft 31. In this way, stable transmission can be ensured between the driving shaft 31 and the driven shaft 334, so that the fan 2 can operate stably. The fan shaft 21 extends in the vertical direction, and the fan blades 22 will generate vertical airflow, that is, the airflow channel 171 extends from the opening 12 at the bottom of the tower body 11 in the vertical direction to the air outlet 13 at the top of the tower body 11. Compared with the inclined setting of the fan shaft 21, this method can ensure that the airflow is evenly and comprehensively sucked into the opening 12 at the bottom of the tower body 11, so as to fully contact with the liquid to be cooled to avoid omissions. At the same time, after the airflow contacts the liquid to be cooled and completes the heat exchange, it can be directly discharged from the air outlet 13 at the top of the tower body 11 to avoid the airflow after the heat exchange still staying inside the tower body 11. Such a setting can effectively improve the flow efficiency.

[0035] The transmission assembly 33 may also include a worm wheel 336 and a worm 337, and the worm wheel 336 is connected to the driven shaft 334, and the worm 337 is connected to the fan shaft 21, that is, the worm wheel 336 drives the worm 337 to rotate, forming a worm wheel and worm speed increase transmission, thereby driving the rotation speed of the fan shaft 21 to increase, effectively improving the efficiency of the fan blades 22 in generating airflow, thereby ensuring the cooling effect on the cooling liquid.

[0036] See also Figure 2 and Figure 3 Optionally, the cooling tower 1 also includes an infusion pipe 15, at least part of which is located inside the tower body 11, and the liquid outlet 14 is a water outlet of the infusion pipe 15 close to the impeller 32, the axis of the water outlet extends in the vertical direction, and the blades of the impeller 32 extend radially along the driving shaft 31.

[0037] The water outlet of the infusion pipe 15 extends in the vertical direction, and the liquid to be cooled is passed into the interior of the tower body 11 from the water outlet. The blades of the impeller 32 extend radially along the driving shaft 31, that is, the liquid to be cooled directly impacts the blades of the impeller 32. On the one hand, in this way, the contact area between the liquid to be cooled and the blades of the impeller 32 is large, and the impact force on the blades of the impeller 32 is also large, thereby ensuring that the impeller 32 has a sufficient rotation speed under the impact. On the other hand, the greater the impact of the liquid to be cooled on the blades of the impeller 32, the smaller the volume of droplets that the liquid to be cooled will be dispersed into. In the process of contact with the rising airflow generated by the ventilator 2, the higher the heat exchange efficiency, that is, the better the cooling effect of the liquid to be cooled.

[0038] In other embodiments, the blades of the impeller 32 may also be arranged to be inclined relative to the radial extension of the driving shaft 31 , and the specific arrangement may be adjusted according to actual production needs.

[0039] Optionally, the fan blades 22 may be fixedly disposed on the fan shaft 21 , or may be adjustably disposed on the fan shaft 21 , and the present disclosure does not limit this, as long as it is suitable for ensuring the cooling effect of the cooling tower 1 .

[0040] See also Figure 2 Optionally, a flow regulating valve 151 is provided on the liquid infusion pipe 15, and the flow regulating valve 151 is used to control the flow rate of the liquid to be cooled entering the liquid infusion pipe 15. In this way, the flow rate of the liquid to be cooled entering the cooling tower 1 can be adjusted according to actual production needs, thereby ensuring the stable operation of the cooling tower 1.

[0041] Here, the flow regulating valve 151 can be set as a stop valve, or can be set as a ball valve, a gate valve, a butterfly valve, etc., which is not limited in the present disclosure.

[0042] See also Figure 1-Figure 5 In one embodiment of the present disclosure, the cooling tower 1 also includes a bearing seat 4, a bearing and a seal 5. The bearing seat 4 is located outside the tower body 11 and is connected to the outer wall of the tower body 11. A through hole is formed on the tower body 11. The end of the driving shaft 31 passes through the through hole and is installed on the bearing seat 4 through a bearing. The seal 5 is located inside the tower body 11 and is used to seal the through hole.

[0043] Through holes are formed on opposite sides of the tower body 11 for the driving shaft 31 to pass through. The end of the driving shaft 31 is installed on the bearing seat 4 through a bearing. The bearing seat 4 is connected to the outer wall of the tower body 11 to provide support for the driving shaft 31. Since there is a gap between the driving shaft 31 and the through hole, in order to prevent the high-temperature liquid to be cooled that enters the tower body 11 from leaking to the outside of the tower body 11 through the gap, a sealing member 5 is provided at the place where the driving shaft 31 inside the tower body 11 passes through the through hole. In this way, the liquid to be cooled is prevented from leaking from the through hole, thereby ensuring the normal operation of the cooling tower 1.

[0044] Optionally, in the present disclosure, the seal 5 is configured as a sealing end cover, and the sealing end cover seals the through hole by means of a skeleton oil seal. In other embodiments, mechanical seals, packing seals, floating ring seals, labyrinth seals, etc. may also be used, as long as they are suitable for achieving a sealing effect on the through hole, and the present disclosure does not limit this.

[0045] See also Figure 2 and Figure 3 In the present disclosure, in order to improve the gas-liquid heat exchange efficiency, the cooling tower 1 also includes a distribution plate 16 and an inclined plate 17. There are multiple distribution plates 16, and the multiple distribution plates 16 are arranged at intervals inside the tower body 11. A plurality of spaced inclined plates 17 are arranged between each adjacent two distribution plates 16. A distribution hole 161 for the liquid to be cooled to pass through is formed on each distribution plate 16. A flow channel 171 is defined between each adjacent two inclined plates 17 so that the distribution holes 161 on the two adjacent distribution plates 16 can be connected through the flow channel 171.

[0046] A plurality of distribution plates 16 are arranged at intervals inside the tower body 11. After the liquid to be cooled impacts the blades of the impeller 32, it falls onto the distribution plate 16 and enters the space between two adjacent distribution plates 16 through the distribution holes 161 on the upper distribution plate 16. The airflow generated by the fan blades 22 enters the interior of the tower body 11 through the opening 12 at the bottom of the tower body 11 and enters the space between two adjacent distribution plates 16 through the distribution holes 161 on the lower distribution plate 16. The inclined plate 17 is arranged between each two adjacent distribution plates 16 and a flow channel 171 is defined between each two adjacent inclined plates 17. The liquid to be cooled enters the flow channel 171 and then flows through the flow channel 171 to the distribution holes 161 on the lower distribution plate 16 and flows out. In this process, the airflow can complete heat exchange with the liquid to be cooled in the flow channel 171.

[0047] In this way, a plurality of distribution holes 161 are provided on the distribution plate 16, which is conducive to dispersing the liquid to be cooled into smaller droplets, increasing the contact area with the airflow, and thereby improving the heat exchange efficiency between the liquid to be cooled and the airflow, and the inclined flow channel 171 can prolong the residence time of the liquid to be cooled and the airflow in the flow channel 171, that is, effectively increase the time for the liquid to be cooled to exchange heat with the airflow, thereby improving the cooling effect of the liquid to be cooled.

[0048] Here, a plurality of spaced inclined plates 17 are arranged between every two adjacent distribution plates 16 . The present disclosure does not limit the inclination angle of the inclined plates 17 , which is based on the angle suitable for increasing the residence time of the liquid to be cooled and the airflow in the flow channel 171 .

[0049] See also Figure 3 In the present disclosure, the plurality of distribution plates 16 include a first distribution plate 162 and a second distribution plate 163 , the first distribution plate 162 is located above the second distribution plate 163 , and the aperture of the distribution holes 161 on the first distribution plate 162 is larger than the aperture of the distribution holes 161 on the second distribution plate 163 .

[0050] The second distribution plate 163 is arranged below the first distribution plate 162. The liquid to be cooled flows into the flow channel 171 from the distribution holes 161 on the first distribution plate 162 and flows out from the distribution holes 161 on the second distribution plate 163. The aperture of the distribution holes 161 on the first distribution plate 162 is larger than the aperture of the distribution holes 161 on the second distribution plate 163. In this arrangement, on the one hand, it is convenient for the liquid to be cooled to flow into the flow channel 171 from the distribution holes 161 on the first distribution plate 162, while the aperture of the distribution holes 161 on the second distribution plate 163 is smaller. When the liquid to be cooled flows from the distribution holes 161 on the second distribution plate 163 When the liquid to be cooled flows out through the holes 161, the volume of the liquid to be cooled is further dispersed, thereby improving the cooling effect on the liquid to be cooled. On the other hand, since the liquid to be cooled will generate a certain impact force on the first distribution plate 162 and the second distribution plate 163 during the falling process, by changing the aperture of the distribution holes 161 on the first distribution plate 162 and the second distribution plate 163, that is, in the process of the liquid to be cooled flowing from the first distribution plate 162 to the second distribution plate 163, the aperture of the distribution holes 161 becomes smaller, which can play a buffering effect and effectively reduce the impact of the liquid to be cooled on the first distribution plate 162 and the second distribution plate 163.

[0051] See also Figure 1-Figure 4In the second aspect, the steam drain cooling system 100 provided by the present disclosure includes a steam drain conveying pipe, a water collecting tank 6, a drain pipe 7 and the above-mentioned cooling tower 1, the steam drain conveying pipe is connected to the liquid outlet 14, the water collecting tank 6 is located at the bottom of the cooling tower 1, the projection of the opening 12 along the vertical direction is located in the water collecting tank 6, one end of the drain pipe 7 is connected to the water collecting tank 6, and the other end of the drain pipe 7 is used to communicate with the water storage tank. In this way, the steam drain cooling system 100 passes the steam drain into the cooling tower 1 through the steam drain conveying pipe, and the steam drain falls from the opening 12 after cooling in the cooling tower 1, and falls into the water collecting tank 6, and the water collecting tank 6 is then connected to the water storage tank through the drain pipe 7 to complete the storage of the cooled steam drain.

[0052] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0053] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0054] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A cooling tower, characterized in that: include: A tower body, wherein an opening is formed at the bottom of the tower body, an air outlet is formed at the top of the tower body, and a liquid outlet is provided at the upper part of the tower body, wherein the liquid outlet is used to pass the liquid to be cooled into the interior of the tower body; A fan is mounted on the top of the tower body, the fan comprising a fan shaft and fan blades mounted on the fan shaft, the fan blades are located inside the tower body and are used to generate an airflow from the opening to the air outlet; The driving mechanism includes a driving shaft, an impeller and a transmission assembly. The driving shaft is rotatably arranged inside the tower body. The impeller is sleeved on the driving shaft and at least part of the impeller's blades are located below the liquid outlet, so that the impeller can rotate under the impact of the liquid to be cooled and drive the driving shaft to rotate. The driving shaft is connected to the fan shaft through the transmission assembly.

2. The cooling tower according to claim 1, characterized in that The transmission assembly includes a first pulley, a second pulley, a belt and a driven shaft. The driven shaft is rotatably arranged on the top of the tower body and is drivingly connected to the fan shaft. The first pulley is sleeved on the driving shaft, the second pulley is sleeved on the driven shaft, and the belt is wound around the first pulley and the second pulley.

3. The cooling tower according to claim 2, characterized in that: The driving mechanism further comprises a protective cover mounted on the tower body, and the first belt pulley, the second belt pulley and the belt are all located inside the protective cover.

4. The cooling tower according to claim 2, characterized in that: The driven shaft extends in a horizontal direction, the fan shaft extends in a vertical direction, and the transmission assembly further comprises a worm wheel and a worm, the worm wheel is connected to the driven shaft, and the worm is connected to the fan shaft.

5. The cooling tower according to claim 1, further comprising a liquid infusion pipe, at least a portion of which is located inside the tower body, the liquid outlet is a water outlet of the liquid infusion pipe close to the impeller, the axis of the water outlet extends in a vertical direction, and the blades of the impeller extend radially along the driving shaft.

6. The cooling tower according to claim 5, characterized in that: The infusion tube is provided with a flow regulating valve, and the flow regulating valve is used to control the flow rate of the liquid to be cooled introduced into the infusion tube.

7. The cooling tower according to claim 1, characterized in that: The cooling tower also includes a bearing seat, a bearing and a seal. The bearing seat is located outside the tower body and connected to the outer wall of the tower body. A through hole is formed on the tower body. The end of the driving shaft passes through the through hole and is installed on the bearing seat through the bearing. The seal is located inside the tower body and is used to seal the through hole.

8. The cooling tower according to any one of claims 1 to 7, characterized in that: The cooling tower also includes a distribution plate and an inclined plate. There are multiple distribution plates, and the multiple distribution plates are spaced apart inside the tower body. A plurality of spaced inclined plates are arranged between each adjacent two distribution plates. Distribution holes for the liquid to be cooled are formed on each distribution plate, and a flow channel is defined between each adjacent two inclined plates so that the distribution holes on the two adjacent distribution plates can be connected through the flow channel.

9. The cooling tower according to claim 8, characterized in that The plurality of distribution plates include a first distribution plate and a second distribution plate, the first distribution plate is located above the second distribution plate, and the aperture of the distribution holes on the first distribution plate is larger than the aperture of the distribution holes on the second distribution plate.

10. A steam drain cooling system, characterized in that: A cooling tower comprising a steam drain conveying pipe, a water collecting tank, a drain pipe and any one of claims 1 to 9, wherein the steam drain conveying pipe is connected to the liquid outlet, the water collecting tank is located at the bottom of the tower body, the projection of the opening along the vertical direction is located in the water collecting tank, one end of the drain pipe is connected to the water collecting tank, and the other end of the drain pipe is used to connect to a water storage tank.

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