阅读说明：本技术 一种带防冻装置的间接式冷却塔 (Indirect cooling tower with anti-freezing device ) 是由 黄建华 董化锋 彭湃 张广健 于 2020-12-31 设计创作，主要内容包括：一种带防冻装置的间接式冷却塔,它涉及一种间接式冷却塔,具体涉及一种带防冻装置的间接式冷却塔。本发明为了解决机组降负荷或者抽气运行时,管内水结冰导致管束变形或传热管冻裂,对机组安全运行造成极大威胁的问题。本发明包括塔体和散热管束,散热管束呈环形围绕在塔体下部的外侧；本发明还包括防冻装置,所述防冻装置包括多个挡风幕,多个挡风幕沿圆周方向首尾依次连接安装在散热管束上。本发明属于发电设备技术领域。(The utility model provides a take indirect cooling tower of freeze-proof device, it relates to an indirect cooling tower, concretely relates to take indirect cooling tower of freeze-proof device. The invention aims to solve the problem that when a unit is in load reduction or air extraction operation, water in a pipe is frozen to cause deformation of a pipe bundle or frost cracking of a heat transfer pipe, and great threat is caused to the safe operation of the unit. The invention comprises a tower body and a heat dissipation pipe bundle, wherein the heat dissipation pipe bundle annularly surrounds the outer side of the lower part of the tower body; the invention also comprises an anti-freezing device which comprises a plurality of wind shielding curtains, wherein the wind shielding curtains are sequentially connected and arranged on the heat dissipation pipe bundle end to end along the circumferential direction. The invention belongs to the technical field of power generation equipment.)

1. An indirect cooling tower with an anti-freezing device comprises a tower body (1) and a radiating pipe bundle (2), wherein the radiating pipe bundle (2) annularly surrounds the outer side of the lower part of the tower body (1); the method is characterized in that: the indirect cooling tower with the anti-freezing device further comprises the anti-freezing device (3), wherein the anti-freezing device (3) comprises a plurality of wind shielding curtains (3-4), and the wind shielding curtains (3-4) are sequentially connected end to end in the circumferential direction and are arranged on the heat dissipation pipe bundle (2).

2. The indirect cooling tower with antifreeze apparatus of claim 1, wherein: the indirect cooling tower with the anti-freezing device further comprises a plurality of retraction mechanisms, the retraction mechanisms are uniformly distributed on the outer side of the heat dissipation pipe bundle (2) along the circumferential direction, and each retraction mechanism is connected with one wind shield curtain (3-4) respectively.

3. The indirect cooling tower with antifreeze apparatus of claim 2, wherein: each retraction mechanism comprises a driving component (3-1), a power roller component (3-2), two tracks (3-3), a pull rope (3-5) and a movable beam (3-7);

the two tracks (3-3) are vertically arranged on the outer side of the heat dissipation tube bundle (2) side by side, the driving assembly (3-1) and the power roller assembly (3-2) are arranged at the upper end of the tracks (3-3), the driving assembly (3-1) is connected with the power roller assembly (3-2), the wind shielding curtain (3-4) is arranged between the two tracks (3-3), the upper end of the pull rope (3-5) is fixedly connected with the power roller assembly (3-2), the lower end of the pull rope (3-5) is fixedly connected with the lower end of the wind shielding curtain (3-4), and the lower end of the wind shielding curtain (3-4) is provided with a movable beam (3-7).

4. The indirect cooling tower with antifreeze apparatus of claim 3, wherein: each retraction mechanism further comprises a storage cover (3-6), the storage covers (3-6) are installed at the upper ends of the rails (3-3), and the driving assemblies (3-1) and the power roller assemblies (3-2) are located in the storage covers (3-6).

5. The indirect cooling tower with antifreeze apparatus of claim 2, wherein: the folding and unfolding mechanism comprises a driving assembly (3-1), a power roller assembly (3-2), two tracks (3-3), a pull rope (3-5), a movable beam (3-7) and pulleys (3-8);

the two tracks (3-3) are vertically arranged on the outer side of the heat dissipation tube bundle (2) side by side, the driving assembly (3-1) and the power roller assembly (3-2) are arranged at the lower end of the tracks (3-3), the pulleys (3-8) are arranged at the upper end of the tracks (3-3), the driving assembly (3-1) is connected with the power roller assembly (3-2), the wind shield curtain (3-4) is arranged between the two tracks (3-3), one end of the pull rope (3-5) is connected with the power roller assembly (3-2), the other end of the pull rope (3-5) rounds the pulleys (3-8) and then is connected with the wind shield curtain (3-4), and the movable beam (3-7) is arranged at the lower end of the wind shield curtain (3-4).

6. The indirect cooling tower with antifreeze apparatus of claim 2, wherein: the retraction mechanism comprises two tracks (3-3), two racks (3-9), two moving assemblies, two connecting rollers (3-14), and two tracks (3-3) which are vertically arranged on the outer side of the heat dissipation pipe bundle (2) side by side, the two racks (3-9) are respectively arranged on the inner sides of the two tracks (3-3), the wind shielding curtain (3-4) is arranged between the two tracks (3-3), the two moving assemblies are respectively arranged on the two tracks (3-3), each moving assembly is in transmission connection with one corresponding rack (3-9), the two moving assemblies are connected through two connecting rollers (3-14), the upper end of the wind shielding curtain (3-4) is fixedly connected with the upper end of the track (3-3), and the lower end of the wind shielding curtain (3-4) is wound on the two connecting rollers (3-14).

7. The indirect cooling tower with antifreeze apparatus of claim 6, wherein: each moving assembly comprises a driving assembly (3-1), two driven gears (3-10), a driving gear (3-11), a U-shaped rod (3-12) and two clasping wheels (3-13);

two driven gears (3-10) are sequentially arranged on the front side of the track (3-3) from top to bottom, two clasping wheels (3-13) are sequentially arranged on the back side of the track (3-3) from top to bottom, each driven gear (3-10) is connected with one corresponding clasping wheel (3-13) through one U-shaped rod (3-12), the driven gear (3-10) and the clasping wheel (3-13) clasp the track (3-3) through the U-shaped rods (3-12), the driven gear (3-10) is meshed with a rack (3-9), a driving gear (3-11) is arranged between the two driven gears (3-10), the driving gear (3-11) is meshed with the driven gear (3-10), the driving gear (3-11) is connected with a driving assembly (3-1), driven gears (3-10) of the two moving assemblies are correspondingly connected one by one through connecting rollers (3-14).

8. The indirect cooling tower with antifreeze apparatus of claim 7, wherein: the folding and unfolding mechanism further comprises a protective net (3-16), the protective net (3-16) is arranged between the wind screen (3-4) and the clasping wheels (3-13), and two ends of the protective net (3-16) are fixed on the two rails (3-3).

9. The indirect cooling tower with antifreeze apparatus of claim 2, 3, 5 or 6, wherein: the retraction mechanism also comprises an upper stop block (3-17) and a lower stop block (3-18);

the rails (3-3) are E-shaped rails, the upper stop blocks (3-17) and the lower stop blocks (3-18) are respectively arranged in any notches of the E-shaped rails, the upper stop blocks (3-17) and the lower stop blocks (3-18) are respectively arranged on side plates of corresponding notches, a first gap between each upper stop block (3-17) and the corresponding notch is used for clamping a cross beam arranged at the uppermost end of the wind screen (3-4) positioned in the middle, and the rest of the cross beams of the wind screen (3-4) in the middle and all the cross beams of the wind screen (3-4) in the lower part can pass through the gap, and a second gap between the lower stop block (3-18) and the corresponding notch is used for clamping a beam arranged at the uppermost end of the lower wind screen (3-4), and the rest beams of the lower wind screen (3-4) can penetrate through the gap.

Technical Field

The invention relates to an indirect cooling tower, in particular to an indirect cooling tower with an anti-freezing device, and belongs to the technical field of power generation equipment.

Background

At present, natural draft cooling system is mostly adopted in power station turbo generator set exhaust cooling, and natural draft cooling system divide into wet-type direct water cooling system and dry-type indirect air cooling system, and this cooling system's principle is that the exhaust after will getting into the steam turbine and doing work cools off and convert the condensate water into suitable temperature through recirculated cooling water, and the condensate water gets into heating equipment (boiler island or nuclear island) heating and turns into behind the high temperature high pressure steam and circulates once more and get back to the steam turbine and do work again.

In the technical field of efficiency of steam turbine generator sets, indirect air cooling systems are safely used in sudden climate environments such as strong wind and the like due to strong output response delay capacity, are more and more applied to power plants in areas with more coal, water shortage and strong wind and high temperature in northwest of China, and air cooling nuclear power stations with high safety requirements are preferred to be indirect air cooling systems in the future. However, due to the incompressibility of the circulating water in the pipe of the indirect air cooling system, when the indirect air cooling system encounters extreme cold weather, particularly when the unit is in load reduction or steam extraction operation, the heat dissipation capacity of a cooling tower constructed by installation and design load is far greater than that of the current working condition, and the water in the pipe is possibly frozen due to the fact that a large temperature difference exists at the tail end or the position with large air leakage, so that the pipe bundle is deformed or a heat transfer pipe is frozen and cracked, and great threat is caused to the safe operation of the unit. This is currently the most interesting problem for power plants.

Disclosure of Invention

The invention provides an indirect cooling tower with an anti-freezing device, which aims to solve the problem that when a unit is in load reduction or air extraction operation, water in a pipe freezes to cause deformation of a pipe bundle or frost cracking of a heat transfer pipe, and great threat is caused to the safe operation of the unit.

The technical scheme adopted by the invention for solving the problems is as follows: the invention comprises a tower body and a heat dissipation pipe bundle, wherein the heat dissipation pipe bundle annularly surrounds the outer side of the lower part of the tower body; the invention also comprises an anti-freezing device which comprises a plurality of wind shielding curtains, wherein the wind shielding curtains are sequentially connected and arranged on the heat dissipation pipe bundle end to end along the circumferential direction.

Furthermore, the invention also comprises a plurality of retraction mechanisms which are uniformly distributed and installed on the outer side of the heat dissipation pipe bundle along the circumferential direction, and each retraction mechanism is respectively connected with one wind shield.

Furthermore, each retraction mechanism comprises a driving assembly, a power roller assembly, two tracks, a pull rope and a movable beam;

two tracks are vertically installed in the outside of heat dissipation tube bank side by side, and drive assembly and power roller assembly install in orbital upper end, and drive assembly is connected with power roller assembly, and the wind-break curtain sets up between two tracks, the upper end and the power roller assembly fixed connection of stay cord, the lower extreme of stay cord and the lower extreme fixed connection of wind-break curtain, and the movable beam is all installed to the lower extreme of wind-break curtain.

Furthermore, every the jack still includes accomodates the cover, accomodates the cover and installs in orbital upper end, and drive assembly and power roller assembly all are located and accomodate the cover.

Furthermore, the retraction mechanism comprises a driving assembly, a power roller assembly, two tracks, a pull rope, a movable beam and a pulley;

two tracks are vertically installed in the outside of heat dissipation tube bank side by side, and drive assembly and power roller assembly install at orbital lower extreme, and the pulley is installed in orbital upper end, and drive assembly is connected with power roller assembly, and the wind-break curtain sets up between two tracks, and the one end and the power roller assembly of stay cord are connected, and the other end of stay cord is connected with the wind-break curtain after bypassing the pulley, and the movable beam is installed at the lower extreme of wind-break curtain.

Furthermore, the retraction mechanism comprises two rails, two racks, two moving assemblies, two connecting rollers, and two rails which are vertically arranged on the outer side of the radiating tube bundle side by side, the two racks are respectively arranged on the inner sides of the two rails, the wind shielding curtain is arranged between the two rails, the two moving assemblies are respectively arranged on the two rails, each moving assembly is in transmission connection with one corresponding rack, the two moving assemblies are connected through the two connecting rollers, the upper end of the wind shielding curtain is fixedly connected with the upper end of the rail, and the lower end of the wind shielding curtain is wound on the two connecting rollers.

Furthermore, each moving assembly comprises a driving assembly, two driven gears, a driving gear, a U-shaped rod and two clasping wheels;

two driven gears from top to bottom set gradually orbital front, and two are embraced the wheel and are set gradually at orbital back from top to bottom, and every driven gear is embraced the wheel through a U type pole and corresponding one and is connected, and driven gear with embrace the wheel and embrace the track through U type pole, driven gear and rack toothing, the driving gear setting is between two driven slave gears, and driving gear and driven gear meshing, the driving gear is connected, two with drive assembly the driven gear of removal subassembly passes through the connecting roller one-to-one and is connected.

Furthermore, the retraction mechanism further comprises a protective net, the protective net is arranged between the wind screen and the holding wheels, and two ends of the protective net are fixed on the two rails.

Furthermore, the retraction mechanism also comprises an upper stop block and a lower stop block;

the track is E type track, go up the dog and set up respectively in the orbital arbitrary notch of E type with lower dog, go up dog and lower dog and all set up on the curb plate that corresponds the notch, go up the dog and correspond clearance one between the notch and be used for blocking the crossbeam that the wind-break curtain top that is located the centre was equipped with, and all the crossbeams homoenergetic that all the other crossbeams of the wind-break curtain that are located the centre and the wind-break curtain that is located the below pass this clearance, clearance two between dog and the corresponding notch is used for blocking the crossbeam that the wind-break curtain top that is located the below was equipped with down, and all the other crossbeams homoenergetic of the wind-break curtain that is located the below pass this clearance.

The invention has the beneficial effects that: 1. an electric anti-freezing device is additionally arranged on the heat dissipation pipe bundle at the bottom of the tower body of the indirect cooling tower, so that the heat dissipation pipe bundle is protected from freezing damage when the unit operates in winter. 2. The device has simple and practical structure, low maintenance cost, low construction cost and quick investment income. 3. The wind shielding curtain is closed, the ventilation quantity is controlled, circulating water can run at a lower temperature, the back pressure of the unit can be adjusted, and the running economy of the unit is improved. 4. The inner and outer wind shielding curtains are closed, so that the heat preservation effect is achieved on the heat dissipation pipe bundle, and the heat dissipation pipe bundle is guaranteed not to be frozen at the temperature of minus 40 ℃.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a side view of an embodiment of the present invention;

FIG. 3 is a top view of an embodiment of the present invention;

FIG. 4 is an enlarged view of portion B of FIG. 3;

FIG. 5 is a schematic view of the E-rail and wind screen assembly of the present invention closed; (Upper stop block and lower stop block are arranged in the same notch of the E-shaped track.)

FIG. 6 is a schematic view of the E-rail and wind screen assembly of the present invention closed; (Upper and lower stoppers are provided in different notches of the E-shaped rail.)

FIG. 7 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 8 is a side view of an embodiment of the present invention;

FIG. 9 is a schematic diagram of a third embodiment of the present invention;

FIG. 10 is a three-sided view of an embodiment of the present invention;

FIG. 11 is a diagram illustrating a fourth embodiment of the present invention;

FIG. 12 is a four-sided view of an embodiment of the present invention;

fig. 13 is an enlarged view of a portion a of fig. 12.

Detailed Description

The first embodiment is as follows: referring to fig. 1 to 13, the present embodiment is described, which is an indirect cooling tower with an anti-freezing device, and includes a tower body 1 and a heat radiation pipe bundle 2, wherein the heat radiation pipe bundle 2 annularly surrounds the outer side of the lower part of the tower body 1; the heat dissipation pipe bundle 2 is characterized by further comprising an anti-freezing device 3, wherein the anti-freezing device 3 comprises a plurality of wind shielding curtains 3-4, and the wind shielding curtains 3-4 are sequentially connected end to end along the circumferential direction and are installed on the heat dissipation pipe bundle 2.

In the embodiment, the wind shielding curtains 3-4 can be installed at the outer side of the radiating pipe bundle 2, or at the inner side of the radiating pipe bundle 2, or the wind shielding curtains 3-4 can be installed at both the inner side and the outer side of the radiating pipe bundle 2.

The second embodiment is as follows: the indirect cooling tower with an anti-freezing device according to the present embodiment is described with reference to fig. 1 to 13, and further includes a plurality of retraction mechanisms, which are uniformly installed on the outer side of the heat dissipation tube bundle 2 along the circumferential direction, and each retraction mechanism is connected to one of the wind screens 3-4. Other components and connections are the same as those in the first embodiment.

The third concrete implementation mode: the embodiment is described with reference to fig. 1 to 13, and each retraction mechanism of the indirect cooling tower with the anti-freezing device of the embodiment comprises a driving 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 tracks 3-3 are vertically arranged on the outer side of the heat dissipation tube bundle 2 side by side, the driving assembly 3-1 and the power roller assembly 3-2 are arranged at the upper end of the track 3-3, the driving assembly 3-1 is connected with the power roller assembly 3-2, the wind shielding curtain 3-4 is arranged between the two tracks 3-3, the upper end of the pull rope 3-5 is fixedly connected with the power roller assembly 3-2, the lower end of the pull rope 3-5 is fixedly connected with the lower end of the wind shielding curtain 3-4, and the lower end of the wind shielding curtain 3-4 is provided with the movable beam 3-7. Other components and connection relationships are the same as those in the second embodiment.

The fourth concrete implementation mode: referring to fig. 1 to 13, each of the retraction mechanisms of the indirect cooling tower with an anti-freezing device according to the present embodiment further includes a storage cover 3-6, the storage cover 3-6 is mounted on the upper end of the rail 3-3, and the driving assembly 3-1 and the power roller assembly 3-2 are located in the storage cover 3-6. Other components and connection relationships are the same as those in the third embodiment.

The fifth concrete implementation mode: the embodiment is described with reference to fig. 1 to 13, and the retraction mechanism of the indirect cooling tower with the anti-freezing device according to the embodiment comprises a driving assembly 3-1, a power roller assembly 3-2, two rails 3-3, a pull rope 3-5, a movable beam 3-7 and pulleys 3-8;

the two tracks 3-3 are vertically arranged on the outer side of the heat dissipation tube bundle 2 side by side, the driving assembly 3-1 and the power roller assembly 3-2 are arranged at the lower end of the track 3-3, the pulley 3-8 is arranged at the upper end of the track 3-3, the driving assembly 3-1 is connected with the power roller assembly 3-2, the wind screen 3-4 is arranged between the two tracks 3-3, one end of the pull rope 3-5 is connected with the power roller assembly 3-2, the other end of the pull rope 3-5 is connected with the wind screen 3-4 after bypassing the pulley 3-8, and the movable beam 3-7 is arranged at the lower end of the wind screen 3-4. Other components and connection relationships are the same as those in the second embodiment.

The sixth specific implementation mode: the embodiment is described with reference to fig. 1 to 13, the retraction mechanism of the indirect cooling tower with an anti-freezing device in the embodiment comprises two rails 3-3, two racks 3-9, two moving assemblies, two connecting rollers 3-14, two rails 3-3 vertically mounted side by side on the outer side of a heat dissipation tube bundle 2, two racks 3-9 respectively mounted on the inner sides of the two rails 3-3, a wind shielding curtain 3-4 disposed between the two rails 3-3, two moving assemblies respectively mounted on the two rails 3-3, each moving assembly respectively in transmission connection with a corresponding one of the racks 3-9, the two moving assemblies connected by two connecting rollers 3-14, the upper end of the wind shielding curtain 3-4 fixedly connected with the upper end of the rail 3-3, the lower end of the wind screen 3-4 is wound around two connection rollers 3-14. Other components and connection relationships are the same as those in the second embodiment.

The seventh embodiment: the embodiment is described with reference to fig. 1 to 13, and each moving assembly of the indirect cooling tower with an anti-freezing device of the embodiment comprises a driving assembly 3-1, two driven gears 3-10, a driving gear 3-11, a U-shaped rod 3-12 and two clasping wheels 3-13;

two driven gears 3-10 are sequentially arranged on the front side of a track 3-3 from top to bottom, two clasping wheels 3-13 are sequentially arranged on the back side of the track 3-3 from top to bottom, each driven gear 3-10 is connected with a corresponding clasping wheel 3-13 through a U-shaped rod 3-12, the driven gear 3-10 and the clasping wheel 3-13 clasp the track 3-3 through the U-shaped rod 3-12, the driven gear 3-10 is meshed with a rack 3-9, a driving gear 3-11 is arranged between the two driven gears 3-10, and the driving gears 3-11 are meshed with the driven gears 3-10, the driving gears 3-11 are connected with the driving assemblies 3-1, and the driven gears 3-10 of the two moving assemblies are correspondingly connected one by one through connecting rollers 3-14. Other components and connection relations are the same as those of the sixth embodiment.

The specific implementation mode is eight: the embodiment is described with reference to fig. 1 to 13, and the retraction mechanism of the indirect cooling tower with an anti-freezing device according to the embodiment further includes a protective net 3-16, the protective net 3-16 is disposed between the wind screen 3-4 and the clasping wheels 3-13, and both ends of the protective net 3-16 are fixed on the two rails 3-3. Other components and connection relationships are the same as those in the seventh embodiment.

The specific implementation method nine: the embodiment is described with reference to fig. 1 to 13, and the retraction mechanism of the indirect cooling tower with an anti-freezing device of the embodiment further comprises upper stoppers 3-17 and lower stoppers 3-18;

the rail 3-3 is an E-shaped rail, the upper baffle blocks 3-17 and the lower baffle blocks 3-18 are respectively arranged in any notch of the E-shaped rail, the upper baffle blocks 3-17 and the lower baffle blocks 3-18 are all arranged on side plates of corresponding notches, a first gap between each upper baffle block 3-17 and each corresponding notch is used for clamping a beam arranged at the uppermost end of the middle wind screen 3-4, the rest beams of the middle wind screen 3-4 and all the beams of the lower wind screen 3-4 can penetrate through the gap, a second gap between each lower baffle block 3-18 and the corresponding notch is used for clamping a beam arranged at the uppermost end of the lower wind screen 3-4, and the rest beams of the lower wind screen 3-4 can penetrate through the gap. The other components and the connection relations are the same as those of the second, third, fifth or sixth embodiment.

Examples

The electric anti-freezing device is additionally arranged on the outer side of the heat dissipation pipe bundle at the bottom of the tower body of the indirect cooling tower, one set of anti-freezing device can be additionally arranged on one or more groups of heat dissipation pipe bundles, and the air inflow of cold air entering the tower is controlled by electrically opening and closing the air curtain in the anti-freezing device, so that the anti-freezing effect on the heat dissipation pipe bundle of the indirect cooling tower is achieved.

The first embodiment is as follows:

as shown in fig. 1 to 6, the wind-shield curtain is composed of an upper wind-shield curtain, a middle wind-shield curtain and a lower wind-shield curtain, three groups of driving rollers are arranged at the upper end of the track and respectively drive the three wind-shield curtains, so that the lower part protection and the part temperature control can be realized, and the dual functions of operation adjustment and freeze prevention can be realized.

An indirect cooling tower with an anti-freezing device comprises a tower body 1, a radiating pipe bundle 2 and a plurality of anti-freezing devices 3; the heat dissipation pipe bundle 2 is arranged on the outer side of the tower body 1 in a surrounding mode, the anti-freezing devices 3 are sequentially arranged on the outer side of the heat dissipation pipe bundle 2 in an end-to-end surrounding mode, and each anti-freezing device 3 comprises two rails 3-3, three driving assemblies 3-1, three power roller assemblies 3-2 and three wind shielding curtains 3-4; the two vertically arranged rails 3-3 are arranged on the outer side of the heat dissipation pipe bundle 2 through rail supports and are used as integral supports of the anti-freezing device 3, one end of each of three power roller assemblies 3-2 arranged between the two rails 3-3 is rotatably connected with the upper end of one of the rails 3-3 through a bearing, preferably, the three power roller assemblies 3-2 are arranged side by side up and down, three driving assemblies 3-1 are fixed on the other rail 3-3 and correspondingly drive the three power roller assemblies 3-2 one by one, each power roller assembly 3-2 controls one wind screen 3-4 through a rolling pull rope 3-5, the number of the control pull ropes 3-5 of each power roller assembly 3-2 is preferably two, the three wind screens 3-4 are sequentially tiled up and down between the two rails 3-3.

The wind screen 3-4 is a folding wind screen 3-4, the pull rope 3-5 is fixedly connected with the lower end of the wind screen 3-4, the pull rings are arranged at the folding position of the wind screen 3-4 at intervals and are sleeved on the pull rope 3-5, the upper end of the pull rope 3-5 is wound on the power roller component 3-2, when the wind screen 3-4 is folded, the lower end of the pull rope 3-5 pulls the lower end of the wind screen 3-4 to rise, and after the pull rings are touched, the wind screen 3-4 at the position is pulled to rise together, so that the wind screen 3-4 is folded.

Each driving component 3-1 adopts a driving motor.

The upper stop blocks 3-17 and the lower stop blocks 3-18 are respectively arranged in any notches of the E-shaped track, the upper stop blocks 3-17 and the lower stop blocks 3-18 are respectively arranged on side plates of corresponding notches, a first gap between each upper stop block 3-17 and each corresponding notch is used for clamping a beam arranged at the uppermost end of the middle wind screen 3-4, other beams of the middle wind screen 3-4 and all beams of the lower wind screen 3-4 can penetrate through the first gap, a second gap between each lower stop block 3-18 and the corresponding notch is used for clamping a beam arranged at the uppermost end of the lower wind screen 3-4, and other beams of the lower wind screen 3-4 can penetrate through the second gap. The upper stop blocks 3-17 and the lower stop blocks 3-18 clamp the uppermost cross beam of the wind screen 3-4, so that the wind screen 3-4 at the position is naturally unfolded under the action of the movable beam 3-7, and the whole wind screen 3-4 can be prevented from falling.

The diameter of the beam arranged at the uppermost end of each wind screen 3-4 is larger than that of other beams of the wind screen 3-4, the movable beam 3-7 is hung at the lower end of each wind screen 3-4, and the diameter of the movable beam 3-7 at the lowermost end of each wind screen 3-4 is the same as that of the beam at the uppermost end of the wind screen 3-4 adjacent to and below the movable beam 3-4.

As shown in fig. 5, the upper and lower stops 3-17 and 3-18 are disposed in the same slot of the E-shaped rail.

As shown in fig. 6, the upper and lower stops 3-17 and 3-18 are disposed in different notches of the E-shaped rail.

And two ends of all the cross beams of each wind screen 3-4 are respectively inserted into two notches of the E-shaped rail in a staggered manner. The wind resistance of the wind screen 3-4 can be increased.

Each anti-freezing device 3 further comprises a storage cover 3-6, and the storage covers 3-6 are mounted at the upper ends of the two rails 3-3 and cover the three driving assemblies 3-1 and the three power roller assemblies 3-2.

The storage cover 3-6 is integrally higher than the cooling triangle, so that the heat dissipation tube bundle is not shielded completely when the wind screen 3-4 is retracted, the support frame is arranged on the back of the storage cover 3-6, the storage cover 3-6 and the support frame are connected through an I-shaped steel connecting arm and a pull rod, the support frame and the main structure of the cooling tower are welded firmly, and the wind load capacity is improved.

The power roller assemblies 3-2 of every two or more groups of anti-freezing devices 3 can be connected by universal joints 3-15, so that every two or more groups of anti-freezing devices 3 share one driving assembly 3-1.

As shown in fig. 7 to 10, the second embodiment and the third embodiment; an indirect cooling tower with an anti-freezing device comprises a radiating pipe bundle 2 and a plurality of anti-freezing devices 3; the heat dissipation pipe bundle 2 is arranged on the outer side of the tower body 1 in a surrounding mode, the anti-freezing devices 3 are sequentially arranged on the outer side of the heat dissipation pipe bundle 2 in an end-to-end surrounding mode, and each anti-freezing device 3 comprises two rails 3-3, a driving assembly 3-1, a power roller assembly 3-2 and a wind shielding curtain 3-4; the two vertically arranged rails 3-3 are mounted on the outer side of the radiating pipe bundle 2 through rail supports and used as an integral support of the anti-freezing device 3, one end of a power roller assembly 3-2 arranged between the two rails 3-3 is rotatably connected with the upper end or the lower end of one rail 3-3 through a bearing, a driving 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 a wind screen 3-4 through a rolling pull rope 3-5, and the wind screen 3-4 is flatly laid between the two rails 3-3.

As shown in fig. 7 to 8, in the second embodiment, when the power roller assembly 3-2 is disposed at the upper end of the track 3-3, both the tracks 3-3 are E-shaped tracks, and the movable beam 3-7 is hung at the lower end of the wind screen 3-4.

The driving assembly 3-1 and the power roller assembly 3-2 are covered with a storage cover 3-6, and the storage cover 3-6 is arranged at the upper end of the two rails 3-3.

In the third embodiment, as shown in fig. 9 and 10, 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 an annular rope, one end of the pull rope 3-5 is sleeved on the power roller assembly 3-2, the other end of the pull rope 3-5 is sleeved on the pulley 3-8, and the pull rope 3-5 is fixed with the upper end of the outer side surface of the wind screen 3-4.

The upper end of the wind screen 3-4 is fixed with a movable beam 3-7.

As shown in fig. 11 to 13, in a fourth embodiment, an indirect cooling tower with an anti-freezing device includes a heat dissipation pipe bundle 2 and a plurality of anti-freezing devices 3; the heat dissipation tube bundle 2 is arranged on the outer side of the tower body 1 in a surrounding mode, the anti-freezing devices 3 are sequentially arranged on the outer side of the heat dissipation tube bundle 2 in an end-to-end surrounding mode, and each anti-freezing device 3 comprises a wind screen 3-4, two rails 3-3, two racks 3-9, four driven gears 3-10, two driving gears 3-11, four U-shaped rods 3-12 and four locking wheels 3-13; the two vertically arranged rails 3-3 are arranged on the outer side of the heat dissipation tube bundle 2 through rail supports and used as an integral support of the anti-freezing device 3, racks 3-9 are fixed on opposite side surfaces of the two rails 3-3, the two racks 3-9 are vertically arranged, each rack 3-9 is in transmission connection with two driven gears 3-10, each driven gear 3-10 is clamped on the corresponding rail 3-3 through a U-shaped rod 3-12 and a clasping wheel 3-13, the driven gears 3-10 and the clasping wheels 3-13 are respectively and rotatably arranged at two ends of the U-shaped rod 3-12, the clasping wheels 3-13 are clung to the side surfaces, far away from the driven gears 3-10, on the rails 3-3, and the driven gears 3-10 on each rack 3-9 are driven through driving gears 3-11 arranged between the driven gears 3-10, the driving gear 3-11 is driven by a driving assembly 3-1, the two driven gears 3-10 located above and the two driven gears 3-10 located below are connected through connecting rollers 3-14, the wind screen 3-4 is flatly laid between the two tracks 3-3, the upper end of the wind screen 3-4 is fixedly connected with the tracks 3-3, and the lower end of the wind screen 3-4 is wound on the two connecting rollers 3-14.

The indirect cooling tower with the anti-freezing device further comprises a protective net 3-16, the protective net 3-16 is arranged between the wind shielding curtain 3-4 and the clasping wheels 3-13, and two ends of the protective net 3-16 are fixed on the two rails 3-3.

The driving assembly 3-1 drives the two driven gears 3-10 to move up and down along the racks 3-9 through the driving gears 3-11, and the wind screen 3-4 is wound or released through the connecting rollers 3-14 in the process that the driven gears 3-10 move up and down, so that the purposes of retracting and expanding the wind screen 3-4 are achieved.

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 a driving wheel, the driving wheel and the driven cloth rolling wheel are in friction transmission, and the driven cloth rolling wheel directly moves up and down along the track 3-3 without arranging the rack 3-9.

The diameters of the two driven gears 3-10 are larger than the diameters of the driving gears 3-11.

The lower ends of the rails 3-3 are connected to supporting legs through flanges, the supporting legs are made of I-shaped steel with good rigidity, and bottom plates at the lower parts of the supporting legs are fixed with cement foundations.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.