Closed energy-saving cooling tower

Abstract

The invention relates to the technical field of closed type cooling towers, in particular to a closed type energy-saving cooling tower which comprises a tower shell, a fan, a circulating pipeline, a water inlet pipeline and a water outlet pipeline, a water collecting tank, a coil pipe and a spraying mechanism are arranged in the tower shell from bottom to top, and anti-freezing pipelines are arranged between the water collecting tank and the coil pipe and the inner wall face of the tower shell. Flexible switching of circulating medium flowing paths is achieved through the guide plate and the control assembly, and the circulating medium conducts heat exchange through the coil pipe at the normal temperature, so that the cooling effect is achieved; at the freezing point and the temperature below, the circulating medium enters the anti-freezing pipeline, and heat conduction is conducted through the tower shell and the low-temperature wall face of the water collecting pool; impurities in air are intercepted through dense distribution of the anti-freezing pipelines in the reserved area and the water collecting pool, heat conduction is conducted through the external environment and the low-temperature wall face of the tower shell in the flowing process, cooling of media is achieved, and heat of the media is released in the flowing process.

Description

Technical Field

[0001] The invention relates to the technical field of closed cooling towers, in particular to a closed energy-saving cooling tower. Background Art

[0002] A closed cooling tower is a highly efficient heat dissipation device that uses a closed circulation system and places a tubular heat exchanger inside the tower. Through the heat exchange between the circulating air, the spray water outside the tube and the circulating water inside the tube, the closed cooling tower can effectively reduce the temperature of the circulating water. Since the circulating water is a closed circulation in the tube, the water quality can be guaranteed to be free from pollution, thereby ensuring the efficient operation of the main equipment and extending its service life. It is widely used in industrial production, commercial buildings and other fields, such as steel, chemical, electric power, air conditioning systems and other industries.

[0003] Closed cooling towers mainly include tower shells, coils, spray mechanisms and other mechanisms, which achieve efficient heat dissipation through internal and external circulation and air flow. In the internal circulation, hot water flows in the coils and exchanges heat with the spray water outside the tubes; in the external circulation, cold water forms a water film through the spray system, part of the water evaporates to take away the heat, and the unevaporated water falls back for recycling. Air enters from the air inlet and flows in the opposite direction of the spray water. After heat exchange on the surface of the coil, the temperature rises and the humidity increases, and it is discharged by the fan to release heat. The electrical control system monitors the temperature of the cooling medium and automatically adjusts the start and stop of the spray water pump and the fan to achieve energy-saving effects. The transformer is a device used to change the voltage in the power system. In plateau areas, such as the Qinghai-Tibet Plateau and the Mongolian Plateau, due to the harsh climatic conditions, the heat dissipation problem of the transformer is more difficult, and these areas have a significant temperature difference between day and night due to the high altitude. The sun is strong during the day and the temperature drops rapidly at night, even close to or below freezing for a long time.

[0004] During the day, closed cooling towers can provide better heat dissipation conditions for the power system in the plateau area. However, at night, the ambient temperature of the closed cooling tower will be below zero. According to actual needs, the cooling tower will reduce the operating time or reduce the operating load, and the heat exchange efficiency is not enough to maintain the temperature of the equipment surface above the freezing point. The metal coil will reduce its toughness and increase its brittleness after freezing, which will lead to cracks. The water circulation inside it is not smooth or stagnant, and the liquid in the water collection tank used for the spray mechanism will freeze. In order to solve this problem, there are currently two main methods. One is to shut down and drain the water immediately when the temperature is below the freezing point and a cold current is predicted to come, so as to prevent the equipment from freezing and cracking in advance; the other is to wrap the water collection tank and its surrounding areas with insulation materials for insulation treatment to reduce heat loss, and start the heating equipment to heat the metal coil and its surrounding areas at low temperatures to prevent cracks due to low temperatures. The former method can indeed solve the problem of large-area icing inside the pipeline, but the layout of the drainage pipeline has many turns and branches, a small diameter and a complex slope. Some water will still remain inside the pipeline after drainage, and the problem of icing in the bend area of ​​the pipeline will still occur at low temperatures; the latter method starts the heating equipment at low temperatures to heat the metal coil and its surrounding areas, which is an effective measure to prevent cracks. However, the heating equipment consumes a lot of electrical energy or thermal energy during operation, especially under extreme low temperature conditions. It is necessary to ensure that the temperature of the pipeline is stable to promote the normal and continuous operation of the cooling tower. This method not only increases the operating cost, but also creates an additional burden on the power grid system. The above two methods each have their advantages, but both have limitations.

[0005] Therefore, a closed energy-saving cooling tower is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a closed energy-saving cooling tower. In order to solve the problem that equipment is easily damaged due to low temperature freezing at night in plateau areas, the current drainage or heating measures are effective but have the problems of incomplete drainage or excessive energy consumption. By switching the operating mode, the circulating medium is cooled by the low temperature environment, and the circulating medium in the hot state is reversely used to prevent the equipment from freezing.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A closed energy-saving cooling tower comprises a tower shell, a fan, a circulation pipeline, a water inlet pipeline and a water outlet pipeline, wherein a water collecting tank, a coil and a spray mechanism are arranged inside the tower shell from bottom to top, an antifreeze pipeline is arranged between the water collecting tank and the coil and the inner wall surface of the tower shell, partition plates are installed on both sides of the top of the tower shell, a reserved area is arranged between the left partition plate and the inner wall surface of the tower shell, a guide plate 1 and a guide plate 2 are installed inside the left reserved area, the guide plate 1 is located between the water inlet pipeline and the input port of the coil, and the guide plate 2 is located between the water outlet pipeline and the output port of the coil A control component is installed between the guide plate one and the guide plate two, windows are provided on the two side walls of the tower shell, and the windows are connected with the interior of the tower shell. The medium flowing into the guide plate one has two outlets, the outlet at the inner end of the guide plate one leads to the input port of the coil, and the outlet at the bottom end of the guide plate one leads to the input port of the antifreeze pipe. The medium flowing into the guide plate two has two inlets, the output port of the coil leads to the inlet at the inner end of the guide plate two, and the output port of the antifreeze pipe leads to the inlet at the bottom end of the guide plate two. The flow path of the circulating medium is switched by adjusting the control component.

[0009] From the above scheme, it can be seen that the existing technology can optimize the structure of natural ventilation of cooling towers, but it has requirements on the height of the tower body, is difficult to construct, has high risks, and the cooling effect is limited by the difficulty of regulating the ambient humidity and temperature. This scheme realizes the flexible operation of the cooling tower at different ambient temperatures by adding antifreeze pipes and control components. It can not only perform efficient heat exchange through coils at normal temperatures, but also prevent the medium from freezing through antifreeze pipes in low temperature environments. At the same time, the control components are used to intelligently switch the flow path of the medium, which improves the adaptability and energy saving of the cooling tower and ensures the stable operation and long-term benefits of the cooling system.

[0010] Preferably, a receiving plate 1 is installed at the head end of the antifreeze pipe, and the receiving plate 1 is located at the middle end of a lower surface of the guide plate. A receiving plate 2 is installed at the end of the antifreeze pipe, and the receiving plate 2 is located at both side ends of the lower surface of the guide plate 2. The positions of the receiving plate 1 and the receiving plate 2 are staggered.

[0011] From the above scheme, it can be seen that the existing technology can use solenoid valves and temperature sensors directly set at the inlet and outlet of the coil to automatically switch the circulation path according to the temperature. However, the installation and maintenance costs of the solenoid valves and temperature sensors of this scheme are high, and the stability requirements of the control system are high. This scheme effectively optimizes the flow path of the medium between the antifreeze pipe and the guide plate by setting staggered connecting plates 1 and 2 at the head and tail ends of the antifreeze pipe, avoiding the accumulation and freezing risks of the medium in a low temperature environment, while ensuring the smooth switching of the medium between the coil and the antifreeze pipe, further improving the operating stability and energy efficiency of the cooling tower in a low temperature environment.

[0012] Preferably, the coil includes a docking plate and a docking hole 1, the docking plate is installed on the inner wall of the partition plate, two docking plates are provided, the docking hole 1 is evenly arranged on the surface of the docking plate, the upper docking plate is connected to the input port of the coil through the docking hole 1, and the lower docking plate is connected to the output port of the coil through the docking hole 1.

[0013] It can be seen from the above scheme that the existing technology adopts the connection method of flange and sealing gasket, but the installation process of this scheme is relatively complicated, and it is necessary to ensure the integrity of the sealing gasket, otherwise leakage problems are likely to occur. This scheme uses a docking plate with a docking hole to connect the coil and the partition plate, which not only realizes the efficient and stable installation of the coil inside the tower shell, but also facilitates the precise docking of the coil input and output ports, reduces the installation difficulty and cost, and at the same time improves the compactness of the overall structure of the cooling tower and the heat exchange efficiency, providing a new idea for the optimized design of the closed energy-saving cooling tower.

[0014] Preferably, the antifreeze pipe has a U-shaped structure, the front end inlet of the antifreeze pipe is higher than the rear end outlet of the antifreeze pipe, the lower end of the antifreeze pipe is embedded and installed on the surface of the water collecting pool, and the bottom end of the antifreeze pipe divides the interior of the water collecting pool into two upper and lower areas.

[0015] It can be seen from the above scheme that the existing technology uses spiral antifreeze pipes, but this scheme will increase the length of the pipe and flow resistance, and requires a more complicated installation process. This scheme designs the antifreeze pipe into a U-shaped structure, and makes its head end inlet higher than the tail end outlet. At the same time, it is embedded in the surface of the water collection tank and divides the interior of the water collection tank into two upper and lower areas. It effectively utilizes gravity to promote the natural circulation of the medium in the antifreeze pipe, reduces the risk of medium retention and freezing in a low temperature environment, and improves the space utilization of the water collection tank, enhancing the stability and durability of the cooling tower under extreme weather conditions.

[0016] Preferably, the circulation pipeline includes a water pump and a pipe body, the water pump is located at the bottom end of the outer wall of the tower shell, one end of the pipe body is connected to the output end of the water pump, and the other end of the pipe body passes through the reserved area and is connected to the spray mechanism, the input end of the water pump is connected to the inside of the water collection tank, and the connection position is located at the lower end of the antifreeze pipe.

[0017] It can be seen from the above scheme that the existing technology will lift the circulating pipe system, but the initial investment cost of this scheme is high, and the technical requirements for installation and maintenance are high. This scheme sets the water pump of the circulating pipe at the bottom of the outer side of the tower shell and connects it to the inside of the water collection tank (located at the lower end of the antifreeze pipe). At the same time, the pipe body passes through the reserved area and connects with the spray mechanism. This not only optimizes the internal layout of the cooling tower and reduces space occupancy, but also ensures that the medium can be smoothly pumped by the water pump and circulated to the spray mechanism in a low temperature environment, effectively avoiding the problem of medium freezing in the pipe, and improving the operating efficiency and reliability of the cooling tower in cold seasons.

[0018] Preferably, both guide plate one and guide plate two have inner cavities formed therein, docking holes three are formed at the bottom ends of the inner cavities, upper docking holes three are formed at the middle end of the inner bottom surface of the inner cavities, lower docking holes three are formed at both sides of the inner bottom surface of the inner cavities, docking holes two are formed at the inner ends of the two inner cavities, and docking holes two are communicated with docking holes one.

[0019] It can be seen from the above scheme that the existing technology will use a sliding guide plate, but this scheme requires additional guide rails and locking mechanisms to ensure the stability and accuracy of the guide plate. This scheme not only enhances the structural strength of the guide plate and the guiding property of the medium flow, but also provides more flexible and diverse medium flow path selection, so that the control component can more accurately adjust the medium flow direction, and improve the adaptability and heat exchange efficiency of the cooling tower under different working conditions by setting an inner cavity and multiple docking holes three inside the guide plate one and the guide plate two, and equipping a matching block connected to the docking hole one.

[0020] Preferably, a matching block and an arc strip are provided inside the inner cavity, two matching blocks are provided, the arc strip is located between the two matching blocks, the two matching blocks match the size of the inner cavity, the outer arc surface of the arc strip matches the inner arc surface of the inner cavity, a docking block is installed on the side surface of one matching block, and a rocker rod is installed on the side surface of the docking block.

[0021] It can be seen from the above scheme that the existing technology will use a rotary connector, but this scheme will require a more complex mechanical structure and control system to ensure its stability and accuracy. This scheme not only further enhances the stability of the guide plate structure and the smoothness of the medium flow by adding matching blocks and arc strips in the inner cavity of the guide plate, and equips it with a docking block with a swing rod, but also makes the guide plate more flexible and accurate in adjusting the flow direction of the medium. The position of the docking block can be easily adjusted by the swing of the swing rod, thereby controlling the flow direction of the medium, providing strong support for the performance optimization and intelligent control of the cooling tower.

[0022] Preferably, the control component includes a vertical strip, a lifting inner rod and an extrusion block. There are two vertical strips, and the two vertical strips are located between guide plate one and guide plate two. The internal movement of the vertical strip is penetrated by the lifting inner rod, and an extrusion block is arranged between the two lifting inner rods.

[0023] It can be seen from the above scheme that the existing technology will adopt a flow distribution system controlled by a solenoid valve and a sensor. However, this scheme requires the addition of an electrical control system, which increases the overall cost and complexity, and has high requirements for the stability and reliability of the system. This scheme achieves precise control of the flow direction of the medium by setting a control component with a lifting inner rod and an extrusion block between the guide plates. By adjusting the height of the lifting inner rod, the position of the extrusion block can be changed, thereby flexibly switching the medium flow path on the guide plate, improving the adaptability and adjustment ability of the cooling tower to different working conditions, and ensuring the stable operation and efficient heat exchange of the cooling system.

[0024] Preferably, the butt ends of the two lifting inner rods and the extrusion block and the upper and lower surfaces of the extrusion block are all provided with inclined surfaces, and the slopes of the inclined surfaces match.

[0025] It can be seen from the above scheme that the existing technology will use a hydraulic piston drive system, but this scheme requires the addition of a hydraulic system and its related components, which may increase the complexity and maintenance cost of the overall system. This scheme sets matching inclined surfaces at the butt end of the lifting inner rod and the extrusion block and the upper and lower surfaces of the extrusion block, so that the lifting inner rod can push the extrusion block to move more smoothly and accurately during the lifting process, thereby more accurately controlling the flow direction of the medium. This design not only improves the sensitivity and response speed of the control component, but also reduces the energy loss caused by friction and resistance, further improving the overall performance and energy-saving effect of the cooling tower.

[0026] Preferably, an electric telescopic rod is installed on one side wall of the tower shell, and the electric telescopic rod is connected to the extrusion block.

[0027] It can be seen from the above scheme that the existing technology will use pneumatic push rods or hydraulic cylinders, but this scheme requires additional air pressure or hydraulic sources, and has high requirements for the sealing and maintenance of the system. This scheme realizes remote and precise control of the control components by installing an electric telescopic rod on the side wall of the tower shell and connecting it to the extrusion block. The telescopic action of the electric telescopic rod can easily adjust the position of the extrusion block, thereby quickly switching the medium flow path, improving the degree of automation and ease of operation of the cooling tower. This design not only reduces the difficulty and cost of manual operation, but also improves the adaptability and operating efficiency of the cooling tower under different working conditions.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. A closed energy-saving cooling tower realizes flexible switching of the flow path of the circulating medium through guide plates and control components. At normal temperature, the circulating medium exchanges heat through the coil to achieve a cooling effect; at temperatures at or below freezing, the circulating medium is diverted into the antifreeze pipe and uses the low-temperature wall of the tower shell and the water collection tank for heat conduction, effectively avoiding the problem of medium freezing in a low-temperature environment and ensuring the stable operation of the cooling system.

[0030] 2. A closed energy-saving cooling tower forms a structure similar to a filter plate through the dense distribution of antifreeze pipes in the reserved area and the water collection tank, which intercepts impurities in the air and prevents the problem of stagnation in the spray water circulation process. At the same time, through the linkage design of the electric telescopic rod and the control component, the switching of the circulating medium flow path is convenient and reliable, which improves the overall performance and reliability of the cooling tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the structure inside the tower shell of the present invention;

[0033] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the assembly of the partition plate and the antifreeze pipe of the present invention from the left side perspective;

[0035] Figure 5 It is a structural schematic diagram of the partition plate and the antifreeze pipe assembly of the present invention from the right side perspective;

[0036] Figure 6 It is a structural schematic diagram of the antifreeze pipeline of the present invention;

[0037] Figure 7 is a schematic diagram of a common flow path of the present invention;

[0038] Figure 8 Schematic diagram of the special flow path of the present invention.

[0039] In the figure: 1. tower shell; 11. partition plate; 12. reserved area; 13. guide plate one; 14. guide plate two; 141. inner cavity; 142. docking hole two; 143. docking hole three; 144. matching block; 145. arc strip; 146. docking block; 147. swing rod; 15. control component; 151. vertical strip plate; 152. lifting inner rod; 153. extrusion block; 154. electric telescopic rod; 16. window; 2. fan; 3. water collection tank; 4. coil; 41. docking plate; 42. docking hole one; 5. spray mechanism; 6. circulation pipe; 61. water pump; 62. pipe body; 7. water inlet pipe; 8. water outlet pipe; 9. antifreeze pipe; 91. receiving plate one; 92. receiving plate two. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figures 1 to 8 The present invention provides a closed energy-saving cooling tower, and the technical solution is as follows:

[0042] A closed energy-saving cooling tower comprises a tower shell 1, a fan 2, a circulation pipe 6, a water inlet pipe 7 and a water outlet pipe 8, wherein the fan 2 is located at the top of the tower shell 1, and a water collecting pool 3, a coil 4 and a spray mechanism 5 are arranged inside the tower shell 1 from bottom to top, the water inlet pipe 7 and the water outlet pipe 8 are respectively arranged at the upper and lower ends of the wall of one side of the tower shell 1, and a circulation pipe 6 is installed between the water inlet pipe 7 and the water outlet pipe 8, and an antifreeze pipe 9 is arranged between the water collecting pool 3 and the coil 4 and the inner wall of the tower shell 1, and partition plates 11 are installed on both sides of the top of the tower shell 1, and the partition plates 11 are located on both sides of the coil 4 and the spray mechanism 5, and the partition plates 11 are located at the upper end of the water collecting pool 3, and a reserved area 12 is arranged between the left partition plate 11 and the inner wall of the tower shell 1, and a guide plate 13 and a guide plate 2 14 are installed on the inner side of the left reserved area 12, and the guide plates 13 and 13 are arranged on the inner side of the left reserved area 12. 4 is connected to the left partition plate 11 and the inner wall of the tower shell 1, the guide plate 1 13 is located between the water inlet pipe 7 and the input port of the coil 4, the guide plate 2 14 is located between the water outlet pipe 8 and the output port of the coil 4, a control component 15 is installed between the guide plate 1 13 and the guide plate 2 14, windows 16 are provided on the two side walls of the tower shell 1, the windows 16 are connected with the interior of the tower shell 1, the medium flowing into the guide plate 1 13 has two outlets, the outlet at the inner side end of the guide plate 1 13 leads to the input port of the coil 4, the outlet at the bottom end of the guide plate 1 13 leads to the input port of the antifreeze pipe 9, the medium flowing into the guide plate 2 14 has two inlets, the output port of the coil 4 leads to the inlet at the inner side end of the guide plate 2 14, the output port of the antifreeze pipe 9 leads to the inlet at the bottom end of the guide plate 2 14, and the flow path of the circulating medium is switched by adjusting the control component 15.

[0043] In this embodiment, the outlets of the medium inside the guide plate 13 and the guide plate 2 14 can be controlled simultaneously by adjusting the control component 15. One is that the input port and the output port of the coil 4 are opened at the same time, and the input port and the output port of the antifreeze pipe 9 are closed at the same time. The other is that the input port and the output port of the antifreeze pipe 9 are opened at the same time, and the input port and the output port of the coil 4 are closed at the same time. Then, the circulating medium has two flow paths, namely, the ordinary path and the special path. The ordinary path is used for the closed cooling tower in the plateau area during the day, and the special path is used for the closed cooling tower in the plateau area at night.

[0044] As an embodiment of the present invention, refer to Figure 4 A receiving plate 91 is installed at the head end of the antifreeze pipe 9, and the receiving plate 91 is located at the middle end of the lower surface of the guide plate 13. A receiving plate 92 is installed at the end of the antifreeze pipe 9, and the receiving plate 92 is located at both side ends of the lower surface of the guide plate 14. The positions of the receiving plates 91 and 92 are staggered.

[0045] In this embodiment, the receiving plate 1 91 and the receiving plate 2 92 are used to connect the outlet of the guide plate 1 13 and the inlet of the guide plate 2 14 respectively.

[0046] As an embodiment of the present invention, refer to Figure 1 The coil 4 includes a docking plate 41 and a docking hole 42. The docking plate 41 is installed on the inner wall of the partition plate 11. Two docking plates 41 are provided. The docking holes 42 are evenly arranged on the surface of the docking plate 41. The upper end of the docking plate 41 is connected to the input port of the coil 4 through the docking hole 42, and the lower end of the docking plate 41 is connected to the output port of the coil 4 through the docking hole 42.

[0047] In this embodiment, the two docking plates 41 are used to dock the outlet of the guide plate 1 13 and the inlet of the guide plate 2 14 respectively.

[0048] As an embodiment of the present invention, refer to Figure 5 and Figure 6 The antifreeze pipe 9 has a U-shaped structure, the first end inlet of the antifreeze pipe 9 is higher than the terminal outlet of the antifreeze pipe 9, the lower end of the antifreeze pipe 9 is embedded and installed on the surface of the water collecting tank 3, and the bottom end of the antifreeze pipe 9 divides the interior of the water collecting tank 3 into two upper and lower areas.

[0049] In this embodiment, the antifreeze pipes 9 are densely distributed in the two reserved areas 12 and inside the water collection tank 3, so that heat transfer occurs in these two areas.

[0050] As an embodiment of the present invention, refer to Figure 3 The circulation pipeline 6 includes a water pump 61 and a pipe body 62. The water pump 61 is located at the bottom end of the outer wall of the tower shell 1. One end of the pipe body 62 is connected to the output end of the water pump 61. The other end of the pipe body 62 passes through the reserved area 12 and is connected to the spray mechanism 5. The input end of the water pump 61 is connected to the inside of the water collecting tank 3, and the connection position is located at the lower end of the antifreeze pipe 9.

[0051] In this embodiment, by utilizing the dense distribution of the antifreeze pipes 9, a structure similar to a filter plate is naturally formed inside the water collection pool 3. Whenever fresh air enters through the daytime window 16, the air will directly contact the upper end of the filter plate, and impurities in the air will be intercepted at the upper end. The circulation of the spray water enters the spray mechanism 5 from the lower end, preventing the circulation of the spray water from being stuck.

[0052] As an embodiment of the present invention, refer to Figure 1 An inner cavity 141 is provided inside the guide plate 13 and the guide plate 2 14, and a docking hole 3 143 is provided at the bottom end of the inner cavity 141. The upper docking hole 3 143 is provided at the middle end of the inner bottom surface of the inner cavity 141, and the lower docking hole 3 143 is provided at both sides of the inner bottom surface of the inner cavity 141. A docking hole 2 142 is provided at the inner side ends of the two inner cavities 141, and the docking hole 2 142 is connected with the docking hole 1 42.

[0053] In this embodiment, the upper docking hole 143 is connected to the first receiving plate 91, and the lower docking hole 143 is connected to the second receiving plate 92. The sizes of the docking hole 142 and the docking hole 143 match.

[0054] As an embodiment of the present invention, refer to Figure 7 A matching block 144 and an arc strip 145 are provided inside the inner cavity 141. Two matching blocks 144 are provided. The arc strip 145 is located between the two matching blocks 144. The two matching blocks 144 match the size of the inner cavity 141. The outer arc surface of the arc strip 145 matches the inner arc surface of the inner cavity 141. A docking block 146 is installed on the side surface of one matching block 144, and a rocker rod 147 is installed on the side surface of the docking block 146.

[0055] In this embodiment, the total length of the arc strip 145 is greater than the combined length of the second docking hole 142 and the third docking hole 143 , so that the second docking hole 142 or the third docking hole 143 can be completely covered.

[0056] As an embodiment of the present invention, refer to Figure 2 and Figure 7 The control component 15 includes a vertical strip 151, a lifting inner rod 152 and an extrusion block 153. There are two vertical strips 151, and the two vertical strips 151 are located between the guide plate 13 and the guide plate 2 14. The internal movement of the vertical strip 151 passes through the lifting inner rod 152, and an extrusion block 153 is arranged between the two lifting inner rods 152.

[0057] In this embodiment, the up and down heights of the two lifting inner rods 152 can be adjusted by the left and right displacement of the extrusion block 153. After the rocker rod 147 is acted upon by the lifting inner rod 152, the docking block 146 will rotate, thereby controlling the steering of the matching block 144 and the arc bar 145.

[0058] As an embodiment of the present invention, refer to Figure 7 and Figure 8 The butt ends of the two lifting inner rods 152 and the extrusion block 153 and the upper and lower surfaces of the extrusion block 153 are all provided with inclined surfaces, and the slopes of the inclined surfaces match.

[0059] In this embodiment, the squeezing block 153 is connected to the two lifting inner rods 152 via an inclined surface, thereby controlling the height of the lifting inner rods 152 to change.

[0060] As an embodiment of the present invention, refer to Figure 1 and Figure 2 An electric telescopic rod 154 is installed on one side wall of the tower shell 1, and the electric telescopic rod 154 is connected to the extrusion block 153.

[0061] In this embodiment, the closed cooling tower detects changes in ambient temperature through a temperature sensor. Once the ambient temperature exceeds or falls below a set threshold, the control system of the cooling tower sends a signal to start the electric telescopic rod 154.

[0062] Working principle: The cooling tower is divided into two operating modes: freezing point temperature and normal temperature. Under normal temperature, when the ambient temperature changes, the temperature of the cooling medium is lowered by heat exchange between spray water and air; when the surrounding environment reaches the freezing point, the arc strip 145 inside the guide plate 13 and the guide plate 2 14 turns, and the flow channel of the circulating medium is switched from the water inlet pipe 7--docking hole 2 142 to the water inlet pipe 7--docking hole 3 143. The medium enters the head end of the antifreeze pipe 9, and the flow path is the left inner wall of the tower shell 1--the inside of the water collecting tank 3--the right inner wall of the tower shell 1 bends back--the inside of the water collecting tank 3--the left inner wall of the tower shell 1. Finally, the medium enters the water outlet pipe 8 from the end of the antifreeze pipe 9. During the flow process, the external environment and the low-temperature wall of the tower shell 1 are used for heat conduction to achieve cooling of the medium. The heat of the medium is also released during the flow process to achieve insulation of the equipment.

[0063] Specifically, when the outside temperature is above freezing, the speed of the fan 2 and the flow rate of the spray water of the spray mechanism 5 are adjusted according to the cooling demand. When the outside temperature is high, the speed of the fan 2 is increased to improve the heat dissipation efficiency, and when the outside temperature is relatively low, the speed of the fan 2 is reduced to reduce energy consumption; when the temperature is high, the spray volume of the spray mechanism 5 is increased to improve the heat dissipation effect, and when the temperature is moderate or low, the spray volume of the spray mechanism 5 is reduced to save water resources and energy consumption.

[0064] When the outside temperature reaches freezing point or below, the internal and external circulation stops running, and the circulating medium still enters the cooling tower to achieve cooling. The specific operations are as follows:

[0065] Switching of the flow path, when the temperature sensed by the cooling system reaches the freezing point, the extrusion block 153 is pushed to the right by the electric telescopic rod 154, and the two lifting inner rods 152 are respectively moved upward and downward after being squeezed, and the two swing rods 147 are acted upon, and the upper docking block 146 drives the corresponding swing rod 147 to swing slightly, and the lower docking block 146 drives the corresponding swing rod 147 to swing slightly in the opposite direction, so that the matching block 144 and the arc bar 145 rotate inside the inner cavity 141, and the arranged docking hole 142 is blocked by the arc bar 145, which can be referred to Figure 7 and Figure 8 , the docking hole three 143 is exposed, and the flow channel of the circulating medium is switched from the water inlet pipe 7 to the docking hole two 142 to the water inlet pipe 7 to the docking hole three 143;

[0066] The entrance to the common path is closed by the arc strip 145, and the entrance to the special path is open;

[0067] The medium is introduced and distributed along a special path. The medium enters the inner cavity 141 from the water inlet pipe 7, and enters the ten pipe openings at the first end of the antifreeze pipe 9 along the docking hole 3 143 and the connecting plate 1 91. The medium flows inside the antifreeze pipe 9, and the flow path is sequentially from the left inner wall of the tower shell 1, the inside of the water collecting tank 3 to the right inner wall of the tower shell 1. At this position, the flow of the medium bends and returns, and the return path is sequentially from the right inner wall of the tower shell 1, the inside of the water collecting tank 3 to the left inner wall of the tower shell 1. The flow range of the medium surrounds the coil 4 and the water collecting tank 3.

[0068] The medium conducts heat bidirectionally, exchanges heat with the surrounding low-temperature environment, and forms a relatively stable temperature field by surrounding the circulating medium. The heat radiation and convection heat transfer of the coil 4 and the water collecting tank 3 to the external environment are reduced, thereby improving its thermal insulation performance. The heat of the medium is absorbed by the wall of the tower shell 1 and the spray water of the water collecting tank 3, the temperature of the medium drops rapidly, and the spray water of the tower shell 1 and the water collecting tank 3 returns to above zero.

[0069] The output of the medium, the cooled medium enters the water outlet pipe 8 from the end of the antifreeze pipe 9, and returns to the cooling system of the transformer to play a heat dissipation role.

[0070] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A closed energy-saving cooling tower, comprising a tower shell (1), a fan (2), a circulation pipe (6), a water inlet pipe (7) and a water outlet pipe (8), wherein a water collecting tank (3), a coil (4) and a spray mechanism (5) are arranged inside the tower shell (1) from bottom to top, and characterized in that: The inner wall surface of the tower shell (1) is provided with an antifreeze pipe (9), partition plates (11) are installed on both sides of the top of the tower shell (1), a reserved area (12) is provided between the partition plate (11) and the inner wall surface of the tower shell (1), a guide plate 1 (13) and a guide plate 2 (14) are installed on the inner side of the left reserved area (12), the guide plate 1 (13) is located between the water inlet pipe (7) and the input port of the coil (4), the guide plate 2 (14) is located between the water outlet pipe (8) and the output port of the coil (4), and a control component is installed between the guide plate 1 (13) and the guide plate 2 (14). (15), windows (16) are provided on both side walls of the tower shell (1), and the medium flowing into the guide plate 1 (13) has two outlets, the outlet at the inner end of the guide plate 1 (13) leads to the input port of the coil (4), and the outlet at the bottom end of the guide plate 1 (13) leads to the input port of the antifreeze pipe (9), and the medium flowing into the guide plate 2 (14) has two inlets, the output port of the coil (4) leads to the inlet at the inner end of the guide plate 2 (14), and the output port of the antifreeze pipe (9) leads to the inlet at the bottom end of the guide plate 2 (14), and the flow path of the circulating medium is switched by adjusting the control component (15).

2. A closed energy-saving cooling tower according to claim 1, characterized in that: A first receiving plate (91) is installed at the head end of the antifreeze pipe (9), and the first receiving plate (91) is located at the middle end of the lower surface of the first guide plate (13). A second receiving plate (92) is installed at the end of the antifreeze pipe (9), and the second receiving plate (92) is located at both side ends of the lower surface of the second guide plate (14). The first receiving plate (91) and the second receiving plate (92) are staggered in position.

3. A closed energy-saving cooling tower according to claim 1, characterized in that: The coil (4) comprises a docking plate (41) and a docking hole (42). The docking plate (41) is mounted on the inner side wall of the partition plate (11). Two docking plates (41) are provided. The docking holes (42) are evenly arranged on the surface of the docking plate (41). The upper docking plate (41) is connected to the input port of the coil (4) through the docking hole (42), and the lower docking plate (41) is connected to the output port of the coil (4) through the docking hole (42).

4. A closed energy-saving cooling tower according to claim 1, characterized in that: The antifreeze pipe (9) has a U-shaped structure, the inlet at the head end of the antifreeze pipe (9) is higher than the outlet at the end of the antifreeze pipe (9), the lower end of the antifreeze pipe (9) is embedded and installed on the surface of the water collecting tank (3), and the bottom end of the antifreeze pipe (9) divides the interior of the water collecting tank (3) into two upper and lower areas.

5. A closed energy-saving cooling tower according to claim 1, characterized in that: The circulation pipeline (6) comprises a water pump (61) and a pipe body (62); the water pump (61) is located at the bottom end of the outer wall of the tower shell (1); one end of the pipe body (62) is connected to the output end of the water pump (61); the other end of the pipe body (62) passes through the reserved area (12) and is connected to the spray mechanism (5); the input end of the water pump (61) is connected to the inside of the water collection tank (3), and the connection position is located at the lower end of the antifreeze pipeline (9).

6. A closed energy-saving cooling tower according to claim 3, characterized in that: The guide plate 1 (13) and the guide plate 2 (14) are both provided with an inner cavity (141), and a docking hole 3 (143) is provided at the bottom end of the inner cavity (141), the upper docking hole 3 (143) is provided at the middle end of the inner bottom surface of the inner cavity (141), and the lower docking hole 3 (143) is provided at both sides of the inner bottom surface of the inner cavity (141), and the inner side ends of the two inner cavities (141) are both provided with a docking hole 2 (142), and the docking hole 2 (142) is connected with the docking hole 1 (42).

7. A closed energy-saving cooling tower according to claim 6, characterized in that: A matching block (144) and an arc strip (145) are arranged inside the inner cavity (141); two matching blocks (144) are arranged; the arc strip (145) is located between the two matching blocks (144); the two matching blocks (144) match the size of the inner cavity (141); the outer arc surface of the arc strip (145) matches the inner arc surface of the inner cavity (141); a docking block (146) is installed on the side surface of one matching block (144); and a rocker rod (147) is installed on the side surface of the docking block (146).

8. A closed energy-saving cooling tower according to claim 1, characterized in that: The control component (15) comprises a vertical strip (151), a lifting inner rod (152) and an extrusion block (153); two vertical strips (151) are provided, and the two vertical strips (151) are located between the first guide plate (13) and the second guide plate (14); the lifting inner rod (152) is movable inside the vertical strip (151), and the extrusion block (153) is provided between the two lifting inner rods (152).

9. A closed energy-saving cooling tower according to claim 8, characterized in that: The butt ends of the two lifting inner rods (152) and the extrusion block (153) and the upper and lower surfaces of the extrusion block (153) are all provided with inclined surfaces, and the slopes of the inclined surfaces match.

10. A closed energy-saving cooling tower according to claim 8, characterized in that: An electric telescopic rod (154) is installed on one side wall of the tower shell (1), and the electric telescopic rod (154) is connected to the extrusion block (153).

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