An indirect cooling tower with antifreeze device

Abstract

An indirect cooling tower with an antifreeze device, it relates to an indirect cooling tower, specifically to an indirect cooling tower with an antifreeze device. The present invention is to solve the problem that when the unit is in load reduction or exhaust operation, the water in the pipe freezes, causing the pipe bundle to deform or the heat transfer pipe to freeze and crack, which poses a great threat to the safe operation of the unit. The present invention includes a tower body and a heat dissipation pipe bundle, the heat dissipation pipe bundle is annularly surrounding the outer side of the lower part of the tower body; the present invention also includes an antifreeze device, the antifreeze device includes a plurality of wind screens, and the plurality of wind screens are connected and installed on the heat dissipation pipe bundle in sequence end to end along the circumferential direction. The present invention belongs to the technical field of power generation equipment.

Description

Technical Field

[0001] The invention relates to an indirect cooling tower, in particular to an indirect cooling tower with an antifreeze device, and belongs to the technical field of power generation equipment. Background Art

[0002] At present, the exhaust cooling of steam turbine generator sets in power plants mostly adopts natural ventilation cooling system, which is divided into wet direct water cooling system and dry indirect air cooling system. The principle of this cooling system is to cool the exhaust gas after entering the steam turbine to do work through circulating cooling water and convert it into condensate of suitable temperature. The condensate enters the heating equipment (boiler island or nuclear island) to be heated and converted into high-temperature and high-pressure steam, and then circulates back to the steam turbine to do work again.

[0003] In the field of steam turbine generator efficiency technology, indirect air cooling systems can be safely used in sudden climate changes such as strong winds because of their strong output response delay capability. In particular, they are increasingly used in power plants in northwest my country where there is a lot of coal, water shortage, strong winds and high temperatures. In the future, air-cooled nuclear power plants with high safety requirements will also prefer indirect air cooling systems. However, due to the incompressibility of the circulating water in the pipes of the indirect air cooling system, when encountering extremely cold weather, especially when the unit is running at reduced load or steam extraction, the heat dissipation capacity of the cooling tower installed with the design load is far greater than the current operating conditions. There will be a large temperature difference in the water in the pipe at the end or in the position with large air leakage, which may cause the water in the pipe to freeze, resulting in deformation of the tube bundle or freezing and cracking of the heat transfer tube, posing a great threat to the safe operation of the unit. This is the most concerned issue for power plants at present. Summary of the invention

[0004] The present invention is to solve the problem that when the unit is in load reduction or exhaust operation, water in the tube freezes, causing tube bundle deformation or heat transfer tube freezing and cracking, which poses a great threat to the safe operation of the unit, and further proposes an indirect cooling tower with an antifreeze device.

[0005] The technical solution adopted by the present invention to solve the above problems is: the present invention includes a tower body and a heat dissipation tube bundle, the heat dissipation tube bundle is annularly surrounding the outer side of the lower part of the tower body; the present invention also includes an antifreeze device, the antifreeze device includes a plurality of wind shielding curtains, and the plurality of wind shielding curtains are connected end to end in sequence along the circumferential direction and installed on the heat dissipation tube bundle.

[0006] Furthermore, the present invention also includes a plurality of retractable mechanisms, which are evenly installed on the outside of the heat dissipation tube bundle along the circumferential direction, and each of the retractable mechanisms is respectively connected to a wind screen.

[0007] Furthermore, each of the retractable and unretractable mechanisms comprises a drive assembly, a power roller assembly, two tracks, a pull rope and a moving beam;

[0008] Two tracks are installed vertically side by side on the outside of the heat dissipation tube bundle, the drive assembly and the power roller assembly are installed at the upper end of the track, the drive assembly is connected to the power roller assembly, the wind screen is set between the two tracks, the upper end of the pull rope is fixedly connected to the power roller assembly, and the lower end of the pull rope is fixedly connected to the lower end of the wind screen, and a moving beam is installed at the lower end of the wind screen.

[0009] Furthermore, each of the retractable mechanisms also includes a storage cover, which is installed at the upper end of the track, and the drive assembly and the power roller assembly are both located in the storage cover.

[0010] Furthermore, the retractable mechanism includes a drive assembly, a power roller assembly, two tracks, a pull rope, a moving beam and a pulley;

[0011] Two tracks are installed vertically side by side on the outside of the heat dissipation tube bundle, the driving assembly and the power roller assembly are installed at the lower end of the track, the pulley is installed at the upper end of the track, the driving assembly is connected to the power roller assembly, the windshield is set between the two tracks, one end of the pull rope is connected to the power roller assembly, the other end of the pull rope is connected to the windshield after passing through the pulley, and the moving beam is installed at the lower end of the windshield.

[0012] Furthermore, the retracting and extending mechanism includes two tracks, two racks, two movable components, and two connecting rollers. The two tracks are vertically installed side by side on the outside of the heat dissipation tube bundle, the two racks are respectively installed on the inner sides of the two tracks, the windshield is arranged between the two tracks, the two movable components are respectively installed on the two tracks, each of the movable components is respectively connected to a corresponding rack for transmission, the two movable components are connected by two connecting rollers, the upper end of the windshield is fixedly connected to the upper end of the track, and the lower end of the windshield is wrapped around the two connecting rollers.

[0013] Furthermore, each of the moving components includes a driving component, two driven gears, a driving gear, a U-shaped rod and two clamping wheels;

[0014] Two driven gears are arranged on the front side of the track from top to bottom, and two clamping wheels are arranged on the back side of the track from top to bottom. Each driven gear is connected to a corresponding clamping wheel through a U-shaped rod, and the driven gear and the clamping wheel clamp the track through the U-shaped rod. The driven gear is meshed with the rack, and the driving gear is arranged between the two driven gears, and the driving gear is meshed with the driven gear. The driving gear is connected to the driving assembly, and the driven gears of the two moving assemblies are connected one by one through connecting rollers.

[0015] Furthermore, the retractable mechanism also includes a protective net, which is arranged between the windshield and the clamping wheel, and the two ends of the protective net are fixed on two tracks.

[0016] Furthermore, the retractable mechanism further includes an upper stopper and a lower stopper;

[0017] The track is an E-type track, and the upper block and the lower block are respectively arranged in any slot of the E-type track, and the upper block and the lower block are both arranged on the side panels of the corresponding slots. A gap one between the upper block and the corresponding slot is used to clamp the crossbeam provided at the uppermost end of the windshield located in the middle, and the remaining crossbeams of the windshield located in the middle and all the crossbeams of the windshield located below can pass through the gap. A gap two between the lower block and the corresponding slot is used to clamp the crossbeam provided at the uppermost end of the windshield located below, and the remaining crossbeams of the windshield located below can pass through the gap.

[0018] The beneficial effects of the present invention are as follows: 1. An electric antifreeze device is installed on the heat dissipation tube bundle at the bottom of the indirect cooling tower body to protect the heat dissipation tube bundle from freezing when the unit is running in winter. 2. The device structure is simple and practical, with low maintenance cost, low engineering cost and fast investment return. 3. The wind curtain is closed to control the ventilation volume, the circulating water can be operated at a lower temperature, the back pressure of the unit can be adjusted, and the economic efficiency of the unit operation is improved. 4. The internal and external wind curtains are closed to keep the heat dissipation tube bundle warm and ensure that the heat dissipation tube bundle will not be frozen at -40°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of Embodiment 1 of the present invention;

[0020] Figure 2 is a side view of an embodiment of the present invention;

[0021] Figure 3 is a top view of the first embodiment of the present invention;

[0022] Figure 4 yes Figure 3 A magnified view of part B;

[0023] Figure 5 It is a schematic diagram of the E-type track and the wind screen when the present invention is closed; (the upper stopper and the lower stopper are arranged in the same notch of the E-type track.)

[0024] Figure 6 Schematic diagram of the E-type track and the wind screen when the present invention is closed; (the upper block and the lower block are arranged in different notches of the E-type track.)

[0025] Figure 7 It is a structural schematic diagram of Embodiment 2 of the present invention;

[0026] Figure 8 is a side view of a second embodiment of the present invention;

[0027] Fig. 9 is a schematic structural diagram of Embodiment 3 of the present invention;

[0028] Fig.10 is a side view of embodiment 3 of the present invention;

[0029] Fig.11 is a structural schematic diagram of a fourth embodiment of the present invention;

[0030] Fig.12 is a side view of the fourth embodiment of the present invention;

[0031] Fig.13 yes Fig.12 Enlarged view of part A. DETAILED DESCRIPTION

[0032] Specific implementation method 1: Combination Figures 1 to 13 The present embodiment is described as an indirect cooling tower with an antifreeze device, which includes a tower body 1 and a heat dissipation tube bundle 2, which is annularly surrounding the outer side of the lower part of the tower body 1; the present embodiment also includes an antifreeze device 3, and the antifreeze device 3 includes a plurality of wind screens 3-4, and the plurality of wind screens 3-4 are connected and installed on the heat dissipation tube bundle 2 in sequence along the circumferential direction.

[0033] In this embodiment, the wind shield 3 - 4 can be installed on the outside of the heat dissipation tube bundle 2 , or on the inside of the heat dissipation tube bundle 2 , or on both the inside and the outside of the heat dissipation tube bundle 2 .

[0034] Specific implementation method 2: Combination Figures 1 to 13 To explain this embodiment, the indirect cooling tower with an antifreeze device described in this embodiment further includes a plurality of retractable mechanisms, which are evenly distributed and installed on the outside of the heat dissipation tube bundle 2 along the circumferential direction, and each of the retractable mechanisms is connected to a wind screen 3-4. Other components and connection relationships are the same as those of the first embodiment.

[0035] Specific implementation method three: Combination Figures 1 to 13 To illustrate this embodiment, each of the retractable and unretractable mechanisms of an indirect cooling tower with an antifreeze device described in this embodiment includes a drive assembly 3-1, a power roller assembly 3-2, two tracks 3-3, a pull rope 3-5 and a moving beam 3-7;

[0036] Two tracks 3-3 are vertically installed side by side on the outside of the heat dissipation tube bundle 2, the driving assembly 3-1 and the power roller assembly 3-2 are installed on the upper end of the track 3-3, the driving assembly 3-1 is connected to the power roller assembly 3-2, the wind screen 3-4 is set between the two tracks 3-3, the upper end of the pull rope 3-5 is fixedly connected to the power roller assembly 3-2, the lower end of the pull rope 3-5 is fixedly connected to the lower end of the wind screen 3-4, and the lower end of the wind screen 3-4 is installed with a moving beam 3-7. Other components and connection relationships are the same as those of the second specific implementation method.

[0037] Specific implementation method four: Combination Figures 1 to 13To explain this embodiment, each of the retractable mechanisms of the indirect cooling tower with an antifreeze device described in this embodiment further includes a storage cover 3-6, which is installed at the upper end of the track 3-3, and the drive assembly 3-1 and the power roller assembly 3-2 are both located in the storage cover 3-6. Other components and connection relationships are the same as those of the specific embodiment three.

[0038] Specific implementation method five: Combination Figures 1 to 13 The present embodiment is described. The retractable mechanism of the indirect cooling tower with an antifreeze device in the present embodiment comprises a driving assembly 3-1, a power roller assembly 3-2, two tracks 3-3, a pull rope 3-5, a moving beam 3-7 and a pulley 3-8;

[0039] Two tracks 3-3 are vertically installed side by side on the outside of the heat dissipation tube bundle 2, the driving assembly 3-1 and the power roller assembly 3-2 are installed at the lower end of the track 3-3, the pulley 3-8 is installed at the upper end of the track 3-3, the driving assembly 3-1 is connected to the power roller assembly 3-2, the wind screen 3-4 is set between the two tracks 3-3, one end of the pull rope 3-5 is connected to the power roller assembly 3-2, the other end of the pull rope 3-5 is connected to the wind screen 3-4 after passing through the pulley 3-8, and the moving beam 3-7 is installed at the lower end of the wind screen 3-4. Other components and connection relationships are the same as those of the second specific implementation method.

[0040] Specific implementation method six: Combination Figures 1 to 13 To explain this embodiment, the retracting and extending mechanism of an indirect cooling tower with an antifreeze device described in this embodiment includes two rails 3-3, two racks 3-9, two moving components, and two connecting rollers 3-14. The two rails 3-3 are vertically installed side by side on the outside of the heat dissipation tube bundle 2, and the two racks 3-9 are respectively installed on the inner sides of the two rails 3-3. The wind screen 3-4 is arranged between the two rails 3-3. The two moving components are respectively installed on the two rails 3-3, and each of the moving components is respectively connected to a corresponding rack 3-9 by transmission. The two moving components are connected through two connecting rollers 3-14. The upper end of the wind screen 3-4 is fixedly connected to the upper end of the rail 3-3, and the lower end of the wind screen 3-4 is wrapped around the two connecting rollers 3-14. Other components and connection relationships are the same as those in the second specific embodiment.

[0041] Specific implementation method seven: Combination Figures 1 to 13 To illustrate this embodiment, each of the moving components of an indirect cooling tower with an antifreeze device described in this embodiment includes a driving component 3-1, two driven gears 3-10, a driving gear 3-11, a U-shaped rod 3-12 and two clamping wheels 3-13;

[0042] Two driven gears 3-10 are arranged on the front of the track 3-3 from top to bottom, and two clamping wheels 3-13 are arranged on the back of the track 3-3 from top to bottom. Each driven gear 3-10 is connected to a corresponding clamping wheel 3-13 through a U-shaped rod 3-12. The driven gear 3-10 and the clamping wheel 3-13 clamp the track 3-3 through the U-shaped rod 3-12. The driven gear 3-10 is meshed with the rack 3-9. The driving gear 3-11 is arranged between the two driven gears 3-10, and the driving gear 3-11 is meshed with the driven gear 3-10. The driving gear 3-11 is connected to the driving assembly 3-1. The driven gears 3-10 of the two moving assemblies are connected one by one through the connecting roller 3-14. Other components and connection relationships are the same as those in the specific embodiment 6.

[0043] Specific implementation method eight: Combination Figures 1 to 13 To explain this embodiment, the retractable mechanism of the indirect cooling tower with an antifreeze device described in this embodiment further includes a protective net 3-16, which is arranged between the wind screen 3-4 and the clamping wheel 3-13, and the two ends of the protective net 3-16 are fixed on two tracks 3-3. Other components and connection relationships are the same as those of the specific embodiment seven.

[0044] Specific implementation method nine: Combination Figures 1 to 13 To illustrate this embodiment, the retractable mechanism of the indirect cooling tower with an antifreeze device described in this embodiment further includes an upper stopper 3-17 and a lower stopper 3-18;

[0045] The track 3-3 is an E-type track, the upper block 3-17 and the lower block 3-18 are respectively arranged in any notch of the E-type track, the upper block 3-17 and the lower block 3-18 are both arranged on the side plates of the corresponding notch, the gap 1 between the upper block 3-17 and the corresponding notch is used to clamp the crossbeam provided at the top end of the windshield 3-4 in the middle, and the remaining crossbeams of the windshield 3-4 in the middle and all the crossbeams of the windshield 3-4 at the bottom can pass through the gap, the gap 2 between the lower block 3-18 and the corresponding notch is used to clamp the crossbeam provided at the top end of the windshield 3-4 at the bottom, and the remaining crossbeams of the windshield 3-4 at the bottom can pass through the gap. Other components and connection relationships are the same as those of the second, third, fifth or sixth specific embodiments.

[0046] Example

[0047] An electric antifreeze device is installed on the outside of the heat dissipation tube bundle at the bottom of the indirect cooling tower body. One or more sets of heat dissipation tube bundles can be equipped with an antifreeze device. By electrically opening and closing the wind curtain in the antifreeze device, the intake amount of cold air entering the tower is controlled, thereby playing an antifreeze role for the heat dissipation tube bundle of the indirect cooling tower.

[0048] Embodiment 1:

[0049] like Figure 1 to Figure 6 As shown, the windshield curtain consists of three parts: upper, middle and lower. Three sets of driving rollers are provided at the upper end of the track, which drive the three windshield curtains respectively, so as to realize the protection of the lower part and the partial temperature control first, and play the dual role of operation adjustment and anti-freezing.

[0050] An indirect cooling tower with an antifreeze device comprises a tower body 1, a heat dissipation tube bundle 2 and a plurality of antifreeze devices 3; the heat dissipation tube bundle 2 is installed around the outside of the tower body 1, and the plurality of antifreeze devices 3 are sequentially connected end to end and installed around the outside of the heat dissipation tube bundle 2, each antifreeze device 3 comprises two rails 3-3, three drive assemblies 3-1, three power roller assemblies 3-2 and three wind curtains 3-4; the two vertically arranged rails 3-3 are installed on the outside of the heat dissipation tube bundle 2 through rail brackets, used as the overall support of the antifreeze device 3, and arranged between the two rails 3-3 One end of the three power roller assemblies 3-2 is rotatably connected to the upper end of one of the tracks 3-3 through a bearing. Preferably, the three power roller assemblies 3-2 are arranged side by side up and down, and the three driving assemblies 3-1 are fixed on another track 3-3 and drive the three power roller assemblies 3-2 one by one. Each power roller assembly 3-2 controls a wind screen 3-4 through a winding rope 3-5. The number of ropes 3-5 controlled by each power roller assembly 3-2 is preferably two. The three wind screens 3-4 are laid flat up and down in sequence between the two tracks 3-3.

[0051] The windshield 3-4 is a foldable windshield 3-4, the pull rope 3-5 is fixedly connected to the lower end of the windshield 3-4, the pull rings are arranged at intervals at the folding part of the windshield 3-4 and are mounted on the pull rope 3-5, the upper end of the pull rope 3-5 is wrapped around the power roller assembly 3-2, and when the windshield 3-4 is folded, the lower end of the pull rope 3-5 pulls the lower end of the windshield 3-4 to rise, and after touching the pull ring, it pulls the windshield 3-4 at this position to rise together, thereby folding the windshield 3-4.

[0052] Each driving assembly 3-1 uses a driving motor.

[0053] The upper block 3-17 and the lower block 3-18 are respectively arranged in any notch of the E-type track, and the upper block 3-17 and the lower block 3-18 are both arranged on the side plates of the corresponding notch. The gap 1 between the upper block 3-17 and the corresponding notch is used to clamp the crossbeam provided at the uppermost end of the windshield 3-4 in the middle, and the remaining crossbeams of the windshield 3-4 in the middle and all the crossbeams of the windshield 3-4 at the bottom can pass through the gap 1. The gap 2 between the lower block 3-18 and the corresponding notch is used to clamp the crossbeam provided at the uppermost end of the windshield 3-4 at the bottom, and the remaining crossbeams of the windshield 3-4 at the bottom can pass through the gap 2. The upper block 3-17 and the lower block 3-18 clamp the crossbeam at the uppermost end of the windshield 3-4, so that the windshield 3-4 at this location is naturally unfolded under the action of the moving beam 3-7, which can prevent the windshield 3-4 from falling as a whole.

[0054] The diameter of the crossbeam at the top of each windshield 3-4 is larger than that of other crossbeams of the windshield 3-4. A movable beam 3-7 is hung at the bottom of each windshield 3-4, and the movable beam 3-7 at the bottom of each windshield 3-4 has the same diameter as the crossbeam at the top of the adjacent windshield 3-4 below it.

[0055] like Figure 5 As shown, the upper stopper 3-17 and the lower stopper 3-18 are arranged in the same slot of the E-type track.

[0056] like Figure 6 As shown, the upper stopper 3-17 and the lower stopper 3-18 are arranged in different slots of the E-type track.

[0057] Both ends of all cross beams of each windscreen 3-4 are staggered and inserted into two notches of the E-shaped track, thereby increasing the wind resistance of the windscreen 3-4.

[0058] Each of the antifreeze devices 3 also includes a storage cover 3-6, which is installed on the upper ends of the two rails 3-3 and covers the three driving components 3-1 and the three power roller components 3-2.

[0059] The storage cover 3-6 is higher than the cooling triangle as a whole, so that the wind screen 3-4 does not block the heat dissipation tube bundle at all when it is retracted. A support frame is arranged on the back of the storage cover 3-6. The storage cover 3-6 and the support frame are connected by an I-beam connecting arm and a pull rod. The support frame and the main structure of the cooling tower are firmly welded to improve the wind load capacity.

[0060] The power roller assemblies 3-2 of every two or more groups of antifreeze devices 3 can be connected by a universal joint 3-15, so that every two or more groups of antifreeze devices 3 share a driving assembly 3-1.

[0061] like Figure 7 to Figure 10As shown, Example 2 and Example 3; an indirect cooling tower with an antifreeze device, comprising a heat dissipation tube bundle 2 and a plurality of antifreeze devices 3; the heat dissipation tube bundle 2 is installed around the outside of the tower body 1, and the plurality of antifreeze devices 3 are installed around the outside of the heat dissipation tube bundle 2 in sequence, each antifreeze device 3 comprises two rails 3-3, a drive assembly 3-1, a power roller assembly 3-2 and a wind screen 3-4; the two vertically arranged rails 3-3 are installed on the outside of the heat dissipation tube bundle 2 through a rail bracket, and serve as the overall support of the antifreeze device 3, one end of the power roller assembly 3-2 arranged between the two rails 3-3 is rotatably connected to the upper end or the lower end of one of the rails 3-3 through a bearing, the drive assembly 3-1 is fixed on the other rail 3-3 and drives the power roller assembly 3-2, the power roller assembly 3-2 controls the wind screen 3-4 by winding the pull rope 3-5, and the wind screen 3-4 is laid flat between the two rails 3-3.

[0062] like Figure 7-Figure 8 As shown, in the second embodiment, when the power roller assembly 3-2 is arranged at the upper end of the track 3-3, both tracks 3-3 are E-type tracks, and a moving beam 3-7 is hung at the lower end of the wind screen 3-4.

[0063] A storage cover 3-6 is provided on the driving assembly 3-1 and the power roller assembly 3-2, and the storage cover 3-6 is installed at the upper ends of the two rails 3-3.

[0064] Fig. 9 , Fig.10 As shown, in embodiment three, when the power roller assembly 3-2 is arranged at the lower end of the track 3-3, the two tracks 3-3 are made of channel steel or C-shaped steel, the pull rope 3-5 is a ring rope, one end of the pull rope 3-5 is looped on the power roller assembly 3-2, and the other end of the pull rope 3-5 is looped on the pulley 3-8, and the pull rope 3-5 is fixed to the upper end of the outer surface of the wind screen 3-4.

[0065] A moving beam 3-7 is fixed to the upper end of the wind curtain 3-4.

[0066] like Figure 11 to Figure 13As shown, embodiment 4, an indirect cooling tower with an antifreeze device, includes a heat dissipation tube bundle 2 and a plurality of antifreeze devices 3; the heat dissipation tube bundle 2 is installed around the outside of the tower body 1, and the plurality of antifreeze devices 3 are installed around the outside of the heat dissipation tube bundle 2 in sequence, each antifreeze device 3 includes a wind screen 3-4, two tracks 3-3, two racks 3-9, four driven gears 3-10, two driving gears 3-11, four U-shaped rods 3-12 and four clamping wheels 3-13; the two vertically arranged tracks 3-3 are installed on the outside of the heat dissipation tube bundle 2 through track brackets, which serve as the overall support of the antifreeze device 3, and racks 3-9 are fixed on the opposite sides of the two tracks 3-3, and the two racks 3-9 are both vertically arranged, and each rack 3-9 is respectively connected to two driven gears 3-10 for transmission, and each driven gear The wheels 3-10 are clamped on the corresponding rails 3-3 by the U-shaped rod 3-12 and the clamping wheel 3-13, the driven gear 3-10 and the clamping wheel 3-13 are rotatably installed at the two ends of the U-shaped rod 3-12 respectively, the clamping wheel 3-13 is tightly attached to the side of the rail 3-3 away from the driven gear 3-10, the two driven gears 3-10 on each rack 3-9 are driven by the driving gear 3-11 arranged therebetween, the driving gear 3-11 is driven by the driving assembly 3-1, the two driven gears 3-10 located above and the two driven gears 3-10 located below are connected by connecting rollers 3-14, the windshield 3-4 is flatly arranged between the two rails 3-3, the upper end of the windshield 3-4 is fixedly connected to the rail 3-3, and the lower end of the windshield 3-4 is wrapped around the two connecting rollers 3-14.

[0067] The indirect cooling tower with antifreeze device also includes a protective net 3-16, which is arranged between the wind screen 3-4 and the clamping wheel 3-13, and the two ends of the protective net 3-16 are fixed on two tracks 3-3.

[0068] The driving assembly 3-1 drives the two driven gears 3-10 to move up and down along the rack 3-9 through the driving gear 3-11. In the process of the driven gears 3-10 moving up and down, the windshield 3-4 is wound or released through the connecting roller 3-14, so as to achieve the purpose of folding and unfolding the windshield 3-4.

[0069] In the fourth embodiment, the driven gear 3-10 and the driving gear 3-11 can be replaced by a driven cloth rolling wheel and an active driving wheel. The active driving wheel and the driven cloth rolling wheel are driven by friction. The driven cloth rolling wheel moves up and down directly along the track 3-3 without the need to set a rack 3-9.

[0070] The diameters of the two driven gears 3 - 10 are greater than the diameter of the driving gear 3 - 11 .

[0071] The lower end of track 3-3 is connected to the support leg through a flange. The support leg is made of I-beam with good rigidity, and the lower bottom plate of the support leg is fixed to the cement foundation.

[0072] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement made to the above embodiments without departing from the content of the technical solution of the present invention, based on the technical essence of the present invention, within the spirit and principles of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. An indirect cooling tower with an antifreeze device, comprising a tower body (1) and a heat dissipation tube bundle (2), wherein the heat dissipation tube bundle (2) is annularly surrounding the outer side of the lower part of the tower body (1); characterized in that: The indirect cooling tower also includes an antifreeze device (3), the antifreeze device (3) including a plurality of wind shielding curtains (3-4), the plurality of wind shielding curtains (3-4) being sequentially connected end to end along a circumferential direction and installed on the heat dissipation tube bundle (2); The indirect cooling tower also includes a plurality of retractable mechanisms, which are evenly distributed and installed on the outside of the heat dissipation tube bundle (2) along the circumferential direction, and each of the retractable mechanisms is respectively connected to a wind screen (3-4); Each of the retractable and retractable mechanisms comprises a drive assembly (3-1), a power roller assembly (3-2), two rails (3-3), a pull rope (3-5) and a movable beam (3-7); the two rails (3-3) are vertically arranged side by side on the outside of the heat dissipation tube bundle (2); the drive assembly (3-1) and the power roller assembly (3-2) are arranged at the upper end of the rails (3-3); the drive assembly (3-1) is connected to the power roller assembly (3-2); the wind screen (3-4) is arranged between the two rails (3-3); the upper end of the pull rope (3-5) is fixedly connected to the power roller assembly (3-2); the lower end of the pull rope (3-5) is fixedly connected to the lower end of the wind screen (3-4); and the lower end of the wind screen (3-4) is provided with a movable beam (3-7); The retractable mechanism further comprises an upper stopper (3-17) and a lower stopper (3-18); the track (3-3) is an E-type track, the upper stopper (3-17) and the lower stopper (3-18) are respectively arranged in any notch of the E-type track, the upper stopper (3-17) and the lower stopper (3-18) are both arranged on the side plates of the corresponding notch, a gap one between the upper stopper (3-17) and the corresponding notch is used to clamp the crossbeam provided at the uppermost end of the windshield (3-4) located in the middle, and the remaining crossbeams of the windshield (3-4) located in the middle and all the crossbeams of the windshield (3-4) located at the bottom can pass through the gap, and a gap two between the lower stopper (3-18) and the corresponding notch is used to clamp the crossbeam provided at the uppermost end of the windshield (3-4) located at the bottom, and the remaining crossbeams of the windshield (3-4) located at the bottom can pass through the gap.

2. The indirect cooling tower with an antifreeze device according to claim 1, characterized in that: Each of the storage and release mechanisms further comprises a storage cover (3-6), the storage cover (3-6) being mounted on the upper end of the track (3-3), and the drive assembly (3-1) and the power roller assembly (3-2) being both located in the storage cover (3-6).

3. An indirect cooling tower with an antifreeze device, comprising a tower body (1) and a heat dissipation tube bundle (2), wherein the heat dissipation tube bundle (2) is annularly surrounding the outer side of the lower part of the tower body (1); characterized in that: The indirect cooling tower also includes an antifreeze device (3), the antifreeze device (3) including a plurality of wind shielding curtains (3-4), the plurality of wind shielding curtains (3-4) being sequentially connected end to end along a circumferential direction and installed on the heat dissipation tube bundle (2); The indirect cooling tower also includes a plurality of retractable mechanisms, which are evenly distributed and installed on the outside of the heat dissipation tube bundle (2) along the circumferential direction, and each of the retractable mechanisms is respectively connected to a wind screen (3-4); The retracting and releasing mechanism comprises a driving assembly (3-1), a power roller assembly (3-2), two tracks (3-3), a pull rope (3-5), a moving beam (3-7) and a pulley (3-8); the two tracks (3-3) are vertically arranged side by side on the outside of the heat dissipation tube bundle (2); the driving assembly (3-1) and the power roller assembly (3-2) are arranged at the lower end of the tracks (3-3); the pulley (3-8) is arranged at the upper end of the tracks (3-3); the driving assembly (3-1) is connected to the power roller assembly (3-2); the windshield (3-4) is arranged between the two tracks (3-3); one end of the pull rope (3-5) is connected to the power roller assembly (3-2); the other end of the pull rope (3-5) is connected to the windshield (3-4) after passing through the pulley (3-8); and the moving beam (3-7) is arranged at the lower end of the windshield (3-4); The retractable mechanism further comprises an upper stopper (3-17) and a lower stopper (3-18); the track (3-3) is an E-type track, the upper stopper (3-17) and the lower stopper (3-18) are respectively arranged in any notch of the E-type track, the upper stopper (3-17) and the lower stopper (3-18) are both arranged on the side plates of the corresponding notch, a gap one between the upper stopper (3-17) and the corresponding notch is used to clamp the crossbeam provided at the uppermost end of the windshield (3-4) located in the middle, and the remaining crossbeams of the windshield (3-4) located in the middle and all the crossbeams of the windshield (3-4) located at the bottom can pass through the gap, and a gap two between the lower stopper (3-18) and the corresponding notch is used to clamp the crossbeam provided at the uppermost end of the windshield (3-4) located at the bottom, and the remaining crossbeams of the windshield (3-4) located at the bottom can pass through the gap.

4. An indirect cooling tower with an antifreeze device, comprising a tower body (1) and a heat dissipation tube bundle (2), wherein the heat dissipation tube bundle (2) is annularly surrounding the outer side of the lower part of the tower body (1); characterized in that: The indirect cooling tower also includes an antifreeze device (3), the antifreeze device (3) including a plurality of wind shielding curtains (3-4), the plurality of wind shielding curtains (3-4) being connected end to end in sequence along a circumferential direction and installed on the heat dissipation tube bundle (2); The indirect cooling tower also includes a plurality of retractable mechanisms, which are evenly distributed and installed on the outside of the heat dissipation tube bundle (2) along the circumferential direction, and each of the retractable mechanisms is respectively connected to a wind screen (3-4); The retractable mechanism comprises two rails (3-3), two racks (3-9), two moving assemblies, and two connecting rollers (3-14); the two rails (3-3) are vertically mounted side by side on the outside of the heat dissipation tube bundle (2); the two racks (3-9) are respectively mounted on the inside of the two rails (3-3); the windshield (3-4) is arranged between the two rails (3-3); the two moving assemblies are respectively mounted on the two rails (3-3); each of the moving assemblies is respectively connected to a corresponding rack (3-9) by transmission; the two moving assemblies are connected via two connecting rollers (3-14); the upper end of the windshield (3-4) is fixedly connected to the upper end of the rail (3-3); and the lower end of the windshield (3-4) is wound around the two connecting rollers (3-14); The retractable mechanism further comprises an upper stopper (3-17) and a lower stopper (3-18); the track (3-3) is an E-type track, the upper stopper (3-17) and the lower stopper (3-18) are respectively arranged in any notch of the E-type track, the upper stopper (3-17) and the lower stopper (3-18) are both arranged on the side plates of the corresponding notch, a gap one between the upper stopper (3-17) and the corresponding notch is used to clamp the crossbeam provided at the uppermost end of the windshield (3-4) located in the middle, and the remaining crossbeams of the windshield (3-4) located in the middle and all the crossbeams of the windshield (3-4) located at the bottom can pass through the gap, and a gap two between the lower stopper (3-18) and the corresponding notch is used to clamp the crossbeam provided at the uppermost end of the windshield (3-4) located at the bottom, and the remaining crossbeams of the windshield (3-4) located at the bottom can pass through the gap.

5. The indirect cooling tower with an antifreeze device according to claim 4, characterized in that: Each of the moving components comprises a driving component (3-1), two driven gears (3-10), a driving gear (3-11), a U-shaped rod (3-12) and two clamping wheels (3-13); the two driven gears (3-10) are arranged on the front side of the track (3-3) in sequence from top to bottom, and the two clamping wheels (3-13) are arranged on the back side of the track (3-3) in sequence from top to bottom, and each driven gear (3-10) is connected to a corresponding clamping wheel (3-13) via a U-shaped rod (3-12). The driven gear (3-10) and the clamping wheel (3-13) clamp the rail (3-3) via a U-shaped rod (3-12); the driven gear (3-10) meshes with the rack (3-9); the driving gear (3-11) is arranged between the two driven gears (3-10), and the driving gear (3-11) meshes with the driven gear (3-10); the driving gear (3-11) is connected to the driving assembly (3-1); and the driven gears (3-10) of the two moving assemblies are connected in a one-to-one correspondence via a connecting roller (3-14).

6. The indirect cooling tower with an antifreeze device according to claim 5, characterized in that: The retractable mechanism also includes a protective net (3-16), which is arranged between the windshield (3-4) and the clamping wheel (3-13), and the two ends of the protective net (3-16) are fixed on two tracks (3-3).

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