Rotatable nozzle for cooling tower spraying device

Abstract

The invention relates to the technical field of cleaning equipment, in particular to a rotatable sprayer for a cooling tower spraying device, which comprises a water spraying pipe and a threaded groove formed in the outer wall of the water spraying pipe, a conical block is arranged right below the water spraying pipe, and a gear ring and a connecting ring are sequentially nested on the outer wall of the water spraying pipe from top to bottom in a sliding manner; and the gear ring is fixedly connected with the connecting ring. When the water spraying pipe sprays water, the conical block, the water baffle and the circular-truncated-cone-shaped shell can rotate, sprayed water can be splashed in different ranges of the upper section, the middle section and the lower section, water distribution can be more uniform, the water can make more sufficient contact with a filler layer in the cooling tower, and the heat exchange efficiency and uniformity are improved. And the water flow impacted on the water baffle is sprayed outwards in a wave manner, so that the contact effect between the water baffle and the filler layer of the cooling tower is further improved, and the contact area and the contact time between the water and the air are increased. And the impact force of high-shooting-speed water flow on the conical block, the multiple water baffles and the circular-truncated-cone-shaped shell can be buffered at the first time.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning equipment, and particularly to a rotatable nozzle for a cooling tower spraying device. Background Technique

[0002] A cooling tower is a device that reduces the water temperature through the heat exchange between water and air, and is widely used in industries such as air-conditioning refrigeration, thermal power generation, and chemical engineering. Its core function is to cool the hot water carrying heat in the system, make it recycled, so as to achieve the dissipation of heat and the temperature control of the system. When working, hot water flows into the cooling tower from the top, and is evenly distributed to the packing layer (internally filled with plastic or metal materials to increase the contact area between water and air) through the spraying device. At the same time, air enters from the bottom or side of the cooling tower, flows countercurrently (or in the same direction) to the falling hot water, and takes away the heat in the water through evaporation, conduction, and convection. Part of the water evaporates into water vapor, and the remaining cooled water is collected in the sump at the bottom of the tower and re-transported to the system for recycling.

[0003] The spraying device is a key component in the cooling tower for evenly dispersing hot water into water droplets or water films. Its function is to ensure that the hot water fully contacts the air in the packing layer and improve the cooling efficiency. The spraying device has a rotatable nozzle assembly, that is, when the nozzle sprays water downward, it will hit the splash wheel. Under the action of water power, it can not only drive the splash wheel to rotate, but also the water will be sprinkled in an umbrella shape.

[0004] However, after the water sprayed by the nozzle passes through the splash wheel, it only sprinkles in a single umbrella shape. Due to the fixed water distribution mode and lack of regulation, there are blind spots between the packing layer, which affects the efficiency and uniformity of heat exchange. At the same time, when the water pressure is high, the water sprayed by the nozzle has a high speed. Each time the water sprayed by the nozzle directly impacts on the splash wheel, the splash wheel cannot buffer the impact force of the high-speed water flow in the first time. In the long run, it is easy to cause the deformation, fracture of the splash wheel structure or loosening of the connecting components. Summary of the Invention

[0005] The purpose of the present invention is to provide a rotatable nozzle for a cooling tower spraying device to solve the problems raised in the above background technique.

[0006] To achieve the above object, the present invention provides the following technical solution: A rotatable nozzle for a cooling tower spraying device, including a spray water pipe and a threaded groove opened on the outer wall of the spray water pipe. A conical block is arranged directly below the spray water pipe. A toothed ring and a connecting ring are slidably nested on the outer wall of the spray water pipe in sequence from top to bottom. The toothed ring and the connecting ring are fixedly connected. An elastic connection mechanism is arranged between the connecting ring and the conical block. A driving mechanism is arranged between the toothed ring and the spray water pipe. The lower end of the conical block is fixedly connected with a splicing plate. The lower end of the splicing plate is fixedly connected with a frustum-shaped shell. A plurality of inclined water baffle plates are rotatably connected to the outer wall of the splicing plate in a circumferential array around its center. A reciprocating movement mechanism is arranged among the frustum-shaped shell, the spray water pipe and the plurality of water baffle plates.

[0007] Preferably, the elastic connection mechanism includes two L-shaped rods II. The two L-shaped rods II are symmetrically and fixedly connected to the outer wall of the connecting ring. Column-shaped grooves are opened at the lower ends of the two L-shaped rods II. L-shaped rods I are respectively arranged in a fitting manner in the two column-shaped grooves. Helical springs I are fixedly connected between the upper ends of the two L-shaped rods I and the tops of the two column-shaped grooves respectively. The ends of the two L-shaped rods I far away from the L-shaped rods II are fixedly connected to the outer wall of the conical block. A limiting component is arranged between the two L-shaped rods I and the spray water pipe.

[0008] Preferably, the limiting component includes a limiting ring, a positioning ring and two positioning rods. The limiting ring is fixedly sleeved on the outer wall of the spray water pipe near the lower edge. The positioning ring is fixedly sleeved on the outer wall of the spray water pipe at the lower edge. The two positioning rods are respectively fixedly connected to the outer walls of the vertical sections of the two L-shaped rods I. The two positioning rods are respectively located below the two L-shaped rods II. The two positioning rods are both located above the limiting ring. Notches are respectively opened at the upper end of the limiting ring corresponding to the two positioning rods.

[0009] Preferably, the driving mechanism includes a fixed block. The fixed block is fixedly connected to the outer wall of the spray water pipe. The fixed block is located above the toothed ring. A protective outer cover is fixedly installed at the end of the fixed block far away from the spray water pipe. A motor is fixedly installed on the inner wall of the protective outer cover. The output shaft of the motor movably penetrates through the lower end of the protective outer cover. A gear is fixedly connected to the output shaft end of the motor. The gear meshes with the toothed ring.

[0010] Preferably, the reciprocating movement mechanism includes a plurality of sliding grooves which are arranged in an annular array around the center of the frustum-shaped shell on the outer wall of the frustum-shaped shell. A connecting rod is fitted in each of the plurality of sliding grooves. The tops of the plurality of connecting rods are respectively rotatably connected to the middle parts of the wall surfaces of the plurality of water baffle plates corresponding to the frustum-shaped shell. The bottoms of the plurality of connecting rods are rotatably connected to a round block together. A connecting column is fixedly connected to the lower end of the round block. An up-and-down reciprocating assembly is arranged between the lower end of the connecting column and the water spraying pipe. A elastic force assembly is arranged between the upper end of the round block and the frustum-shaped shell.

[0011] Preferably, the up-and-down reciprocating assembly includes a connecting disc and a concave rod. The connecting disc is fixedly connected to the lower end of the connecting column. A spherical block one is fixedly connected to the lower edge of the connecting disc. One end of the concave rod is fixedly connected to the outer wall of the water spraying pipe. The other end of the concave rod is fixedly connected to a fixed disc. The fixed disc is located directly below the connecting disc. A plurality of spherical blocks two are fixedly connected to the upper edge of the fixed disc around its center in an annular array.

[0012] Preferably, the elastic force assembly includes a sliding column. The sliding column is fixedly connected to the upper end of the round block. A fixed pipe is slidably sleeved on the outer wall of the sliding column. The upper end of the fixed pipe is fixedly connected to the inner top end of the frustum-shaped shell. A spiral spring two is fixedly connected between the upper end of the sliding column and the inner top end of the frustum-shaped shell. The spiral spring two is located inside the fixed pipe.

[0013] Preferably, an annular groove is formed on the outer wall of the water spraying pipe. The toothed ring and the connecting ring are both slidably matched with the annular groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. Through the mutual cooperation of the conical block, the toothed ring, the connecting ring, the elastic connection mechanism, the limiting component, the driving mechanism, the splicing disc, the frustum-shaped shell, the water baffle plate and the annular groove, when the water spraying pipe of the cooling tower spraying device sprays water, the conical block, the water baffle plate and the frustum-shaped shell can rotate, and the sprayed water can form splashes in three different ranges of upper, middle and lower sections, so as to distribute water more evenly, contact the packing layer in the cooling tower more fully, and thus improve the efficiency and uniformity of heat exchange.

[0016] 2. Through the mutual cooperation of the reciprocating movement mechanism, the up-and-down reciprocating assembly and the elastic force assembly, the water baffle plate can not only rotate but also reciprocate up and down, so that the water flow impacting on the water baffle plate spills outwards in a wave shape. This can not only further improve the contact effect with the packing layer of the cooling tower, but also increase the contact area and contact time between water and air, enabling more water to come into full contact with air, and thus more effectively taking away heat through evaporation, conduction and convection, etc., and further improving the heat exchange efficiency.

[0017] 3. Under the action of the first helical spring, the impact force caused by the high-speed water flow on the conical block, multiple water baffle plates and the frustum-shaped shell can be buffered immediately, thereby avoiding damage to the conical block, multiple water baffle plates 7 and the frustum-shaped shell over a long period. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a cross-sectional view of the protective outer cover, fixed block, second L-shaped rod and water spray pipe of the present invention;

[0020] Figure 3 of the present invention Figure 2 is an enlarged view of the structure at A in;

[0021] Figure 4 is a partial structural schematic diagram of the frustum-shaped shell of the present invention;

[0022] Figure 5 of the present invention Figure 4 is an enlarged view of the structure at B in;

[0023] Figure 6 is a cross-sectional view of the frustum-shaped shell and the fixed pipe of the present invention;

[0024] Figure 7 is a display diagram of the limit ring, positioning ring, water spray pipe, thread groove, notch and annular groove of the present invention.

[0025] In the drawings, the list of components represented by each reference numeral is as follows: 1. Protective outer cover; 2. Fixed block; 3. Tooth ring; 4. Connecting ring; 5. Limit ring; 6. Positioning ring; 7. Water baffle plate; 8. Frustum-shaped shell; 9. Conical block; 10. First L-shaped rod; 11. Positioning rod; 12. Concave rod; 13. Second L-shaped rod; 14. Water spray pipe; 15. Thread groove; 16. Motor; 17. Gear; 18. Fixed disk; 19. Connecting rod; 20. Notch; 21. First helical spring; 22. Cylindrical groove; 23. Splicing disk; 24. Sliding groove; 25. First spherical block; 26. Second spherical block; 27. Connecting disk; 28. Connecting column; 29. Round block; 30. Sliding column; 31. Second helical spring; 32. Fixed pipe; 33. Annular groove. DETAILED DESCRIPTION OF THE INVENTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] The present invention provides a technical solution: As Figure 1 - Figure 7 shown, a rotatable nozzle for a cooling tower spraying device includes a spray water pipe 14 and a thread groove 15 opened on the outer wall of the spray water pipe 14. A conical block 9 is arranged directly below the spray water pipe 14. A toothed ring 3 and a connecting ring 4 are slidably nested on the outer wall of the spray water pipe 14 from top to bottom in sequence. The toothed ring 3 and the connecting ring 4 are fixedly connected. An elastic connection mechanism is arranged between the connecting ring 4 and the conical block 9. A driving mechanism is arranged between the toothed ring 3 and the spray water pipe 14. The lower end of the conical block 9 is fixedly connected with a splicing plate 23. The lower end of the splicing plate 23 is fixedly connected with a frustum-shaped shell 8. A plurality of inclined water baffle plates 7 are rotatably connected to the outer wall of the splicing plate 23 in a circumferential array around its center. A reciprocating movement mechanism is arranged among the frustum-shaped shell 8, the spray water pipe 14 and the plurality of water baffle plates 7.

[0028] The elastic connection mechanism includes two L-shaped rods II 13. The two L-shaped rods II 13 are symmetrically and fixedly connected to the outer wall of the connecting ring 4. Column-shaped grooves 22 are opened at the lower ends of the two L-shaped rods II 13. L-shaped rods I 10 are respectively arranged in a fitting manner in the two column-shaped grooves 22. Helical springs I 21 are fixedly connected between the upper ends of the two L-shaped rods I 10 and the tops of the two column-shaped grooves 22 respectively. The ends of the two L-shaped rods I 10 far away from the L-shaped rods II 13 are fixedly connected to the outer wall of the conical block 9. A limiting component is arranged between the two L-shaped rods I 10 and the spray water pipe 14.

[0029] The limiting component includes a limiting ring 5, a positioning ring 6 and two positioning rods 11. The limiting ring 5 is fixedly sleeved on the outer wall of the spray water pipe 14 near the lower edge. The positioning ring 6 is fixedly sleeved on the outer wall of the spray water pipe 14 at the lower edge. The two positioning rods 11 are respectively fixedly connected to the outer walls of the vertical sections of the two L-shaped rods I 10. The two positioning rods 11 are respectively located below the two L-shaped rods II 13. The two positioning rods 11 are both located above the limiting ring 5. Notches 20 are respectively opened at the upper end of the limiting ring 5 corresponding to the two positioning rods 11.

[0030] The driving mechanism includes a fixed block 2, which is fixedly connected to the outer wall of the water spray pipe 14. The fixed block 2 is located above the toothed ring 3. One end of the fixed block 2 away from the water spray pipe 14 is fixedly installed with a protective outer cover 1. An electric motor 16 is fixedly installed on the inner wall of the protective outer cover 1. The output shaft of the electric motor 16 movably penetrates through the lower end of the protective outer cover 1. The end of the output shaft of the electric motor 16 is fixedly connected with a gear 17, and the gear 17 meshes with the toothed ring 3. Specifically, the electric motor 16 is a brake motor. After the electric motor 16 stops running, the output shaft of the electric motor 16 will be fixed and will not rotate easily due to external forces.

[0031] The reciprocating movement mechanism includes a plurality of sliding grooves 24, which are arranged in a circular array around the center of the frustum-shaped shell 8 on the outer wall of the frustum-shaped shell 8. Connecting rods 19 are respectively arranged in a fitting manner in the plurality of sliding grooves 24. The tops of the plurality of connecting rods 19 are respectively rotatably connected to the middle parts of the wall surfaces of the plurality of water baffle plates 7 corresponding to the frustum-shaped shell 8. The bottoms of the plurality of connecting rods 19 are jointly rotatably connected to a circular block 29. The lower end of the circular block 29 is fixedly connected with a connecting column 28. An up-and-down reciprocating assembly is arranged between the lower end of the connecting column 28 and the water spray pipe 14. An elastic force assembly is arranged between the upper end of the circular block 29 and the frustum-shaped shell 8.

[0032] The up-and-down reciprocating assembly includes a connecting disc 27 and a concave rod 12. The connecting disc 27 is fixedly connected to the lower end of the connecting column 28. A spherical block one 25 is fixedly connected to the lower edge of the connecting disc 27. One end of the concave rod 12 is fixedly connected to the outer wall of the water spray pipe 14. The other end of the concave rod 12 is fixedly connected with a fixed disc 18. The fixed disc 18 is located directly below the connecting disc 27. A plurality of spherical blocks two 26 are fixedly connected to the upper edge of the fixed disc 18 in a circular array around its center.

[0033] The elastic force assembly includes a sliding column 30, which is fixedly connected to the upper end of the circular block 29. A fixed pipe 32 is slidably sleeved on the outer wall of the sliding column 30. The upper end of the fixed pipe 32 is fixedly connected to the inner top end of the frustum-shaped shell 8. A helical spring two 31 is fixedly connected between the upper end of the sliding column 30 and the inner top end of the frustum-shaped shell 8. The helical spring two 31 is located inside the fixed pipe 32.

[0034] An annular groove 33 is formed on the outer wall of the water spray pipe 14. The toothed ring 3 and the connecting ring 4 are both slidably matched with the annular groove 33.

[0035] Working principle: First, the water spray pipe 14 can be rotatably installed on the threaded interface of the spray pipe of the cooling tower through the threaded groove 15 on its outer wall. This is a well-known prior art and will not be elaborated here. When the cooling tower is operating and the spray pipe of the cooling tower is delivering water, the water will be quickly ejected from the water spray pipe 14. It should be noted that the high-speed water flow will impact the conical block 9 immediately. Under the impact of the water flow, the conical block 9, the splicing disc 23, the frustum-shaped shell 8, and multiple baffle plates 7 will move downward together. The two first L-shaped rods 10 will slide downward in the cylindrical grooves 22 on the two first L-shaped rods 10 respectively. And the two first L-shaped rods 10 will pull downward the first spiral springs 21 connected to them respectively. And the two first L-shaped rods 10 will drive the positioning rods 11 connected to them to pass downward through the respective notches 20 on the limit ring 5 until the lower ends of the two positioning rods 11 move downward to fit against the upper end of the positioning ring 6. At this time, under the impact of the water flow, the lower ends of the two positioning rods 11 will always fit against the upper end of the positioning ring 6. It should be noted that under the action of the first spiral spring 21, the impact force of the high-speed water flow on the conical block 9, multiple baffle plates 7, and the frustum-shaped shell 8 can be buffered immediately, thus avoiding damage to the conical block 9, multiple baffle plates 7, and the frustum-shaped shell 8 over time.

[0036] Subsequently, start the motor 16. The motor 16 can drive the gear 17 to rotate. The gear 17 will drive the toothed ring 3 to rotate. The toothed ring 3 will drive the connecting ring 4 to rotate (both the toothed ring 3 and the connecting ring 4 will rotate in the annular groove 33 outside the water spray pipe 14). The connecting ring 4 will drive the two second L-shaped rods 13 to rotate together. The two second L-shaped rods 13 can drive the first L-shaped rods 10 on their respective inner sides to rotate together. The two first L-shaped rods 10 can drive the conical block 9 to rotate together. The conical block 9 will drive the splicing disc 23, the frustum-shaped shell 8, and multiple baffle plates 7 to rotate together. The two positioning rods 11 will rotate while fitting between the limit ring 5 and the positioning ring 6. It should be noted that the water flow will not only impact on the rotating conical block 9, but also impact on the rotating multiple baffle plates 7, and will also pass through the gaps between the multiple baffle plates 7 and impact on the rotating frustum-shaped shell 8. Since the taper of the conical block 9, the angle of the baffle plate 7, and the taper of the frustum-shaped shell 8 are different, and combined with Figure 2 it can be seen that the angle of the baffle plate 7 is the largest, and the taper of the frustum-shaped shell 8 is larger than the taper of the conical block 9. Then, under the reaction force of the water flow impacting on these three, the water flow will be splashed outward in the upper, middle, and lower sections. And the upper section has a smaller splashing range, the middle section has a larger splashing range, and the lower section is smaller than the middle section but larger than the upper section. Thus, the water can be distributed more evenly and come into more sufficient contact with the packing layer in the cooling tower, thereby improving the efficiency and uniformity of heat exchange.

[0037] It should be noted that, when the truncated cone shell 8 rotates, it also drives the plurality of connecting rods 19, the round block 29, the connecting column 28, the sliding column 30, the fixed tube 32, the coil spring 2 31, the connecting plate 27 and the spherical block 1 25 to rotate together. When the truncated cone shell 8 moves downward, it also drives the plurality of connecting rods 19, the round block 29, the connecting column 28, the sliding column 30, the fixed tube 32, the coil spring 2 31, the connecting plate 27 and the spherical block 1 25 to move downward together. The spherical block 1 25 will not only move downward to the fixed plate 18 (fixed plate 18 The spherical block 1 25 is connected to the water spray pipe 14 through the concave rod 12, and the rotation of the spherical block 1 25 will squeeze the multiple spherical blocks 2 26 one by one. When the spherical block 1 25 and each spherical block 2 26 are squeezed (it should be noted that at this time, the two positioning rods 11 not only move between the limit ring 5 and the positioning ring 6, but also the two positioning rods 11 are staggered with the two notches 20 respectively), the spherical block 1 25 will move upward due to the squeezing, and the spherical block 1 25 will drive the connecting plate 27, the connecting column 28, the round block 29 and the sliding column 30 to move upward together, and the sliding column 30 The spherical block 25 will slide up in the fixed tube 32 and squeeze the coil spring 2 31, and the round block 29 will also drive the multiple connecting rods 19 to rotate upward synchronously, and the multiple connecting rods 19 will drive the water baffles 7 connected to them to rotate upward on the splicing plate 23. When the spherical block 1 25 leaves each spherical block 26, under the action of the coil spring 2 31, the spherical block 1 25, the connecting plate 27, the connecting column 28, the round block 29 and the sliding column 30 will automatically move downward, and the round block 29 will drive the multiple connecting rods 19 to rotate downward synchronously, and the multiple connecting rods 19 will bring The water baffles 7 connected to each other are rotated downward on the splicing plate 23, so that the multiple water baffles 7 can also reciprocate upward and downward while rotating, so that the water impacting the multiple water baffles 7 is sprinkled outward in a wave-like manner, which can not only further improve the contact effect with the cooling tower packing layer, but also increase the contact area and contact time between water and air, so that more water can fully contact with the air, thereby more effectively taking away heat through evaporation, conduction and convection, thereby further improving the heat exchange efficiency.

[0038] It should be noted that, when the cooling tower is finished running and the water spray pipe 14 stops spraying water, the two positioning rods 11 are rotated to the position as shown in FIG. Figure 1 and Figure 3 After the state shown, the motor 16 is turned off, so that the two positioning rods 11 continue to correspond to the two notches 20 on the limit ring 5, so that when the water pipe 14 sprays water next time, the conical block 9, the splicing plate 23, the truncated cone shell 8 and the multiple water retaining plates 7 will move down together to perform a buffering effect.

[0039] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or apparatus.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotatable spray head for a cooling tower spray device, comprising a spray pipe (14) and a threaded groove (15) provided on the outer wall of the spray pipe (14), characterized in that: A conical block (9) is arranged directly below the water spray pipe (14); a toothed ring (3) and a connecting ring (4) are slidably nested in the outer wall of the water spray pipe (14) from top to bottom in sequence; the toothed ring (3) and the connecting ring (4) are fixedly connected; an elastic connecting mechanism is arranged between the connecting ring (4) and the conical block (9); a driving mechanism is arranged between the toothed ring (3) and the water spray pipe (14); a splicing plate (23) is fixedly connected to the lower end of the conical block (9); a truncated cone shell (8) is fixedly connected to the lower end of the splicing plate (23); a plurality of inclined water baffles (7) are connected to the outer wall of the splicing plate (23) in a circular array rotating around the center thereof; a reciprocating mechanism is arranged between the truncated cone shell (8), the water spray pipe (14) and the plurality of water baffles (7).

2. The rotatable nozzle for a cooling tower spray device according to claim 1, characterized in that: The elastic connection mechanism comprises two L-shaped rods (13) which are symmetrically fixedly connected to the outer wall of the connecting ring (4). The lower ends of the two L-shaped rods (13) are provided with columnar grooves (22). The two columnar grooves (22) are fitted with L-shaped rods (10). The upper ends of the two L-shaped rods (10) are respectively fixedly connected to the tops of the two columnar grooves (22) with coil springs (21). The ends of the two L-shaped rods (10) away from the L-shaped rods (13) are fixedly connected to the outer wall of the conical block (9). A limiting assembly is provided between the two L-shaped rods (10) and the water spray pipe (14).

3. The rotatable nozzle for a cooling tower spray device according to claim 2, characterized in that: The limiting assembly comprises a limiting ring (5), a positioning ring (6) and two positioning rods (11); the limiting ring (5) is fixedly sleeved on the outer wall of the water spray pipe (14) near the lower edge; the positioning ring (6) is fixedly sleeved on the lower edge of the outer wall of the water spray pipe (14); the two positioning rods (11) are respectively fixedly connected to the outer walls of the vertical sections of the two L-shaped rods (10); the two positioning rods (11) are respectively located below the two L-shaped rods (13); the two positioning rods (11) are both located above the limiting ring (5); and the upper end of the limiting ring (5) is provided with notches (20) corresponding to the two positioning rods (11).

4. The rotatable nozzle for a cooling tower spray device according to claim 1, characterized in that: The driving mechanism comprises a fixed block (2), the fixed block (2) being fixedly connected to the outer wall of the water spray pipe (14), the fixed block (2) being located above the gear ring (3), a protective cover (1) being fixedly mounted on one end of the fixed block (2) away from the water spray pipe (14), a motor (16) being fixedly mounted on the inner wall of the protective cover (1), an output shaft of the motor (16) movably passing through the lower end of the protective cover (1), a gear (17) being fixedly connected to the output shaft end of the motor (16), and the gear (17) and the gear ring (3) being meshed with each other.

5. The rotatable nozzle for a cooling tower spray device according to claim 1, characterized in that: The reciprocating mechanism comprises a plurality of sliding grooves (24), the plurality of sliding grooves (24) being arranged on the outer wall of the truncated cone-shaped shell (8) in a central annular array around the truncated cone-shaped shell (8), the plurality of sliding grooves (24) being fitted with connecting rods (19), the top ends of the plurality of connecting rods (19) being rotatably connected to the middle of the wall surface of the truncated cone-shaped shell (8) corresponding to the plurality of water retaining plates (7), the bottom ends of the plurality of connecting rods (19) being rotatably connected to a round block (29), the lower end of the round block (29) being fixedly connected to a connecting column (28), an upper and lower reciprocating assembly being arranged between the lower end of the connecting column (28) and the water spray pipe (14), and an elastic assembly being arranged between the upper end of the round block (29) and the truncated cone-shaped shell (8).

6. The rotatable spray head for a cooling tower spray device according to claim 5, characterized in that: The up-and-down reciprocating assembly comprises a connecting plate (27) and a concave rod (12), wherein the connecting plate (27) is fixedly connected to the lower end of a connecting column (28), a spherical block 1 (25) is fixedly connected to the lower edge of the connecting plate (27), one end of the concave rod (12) is fixedly connected to the outer wall of the water spray pipe (14), the other end of the concave rod (12) is fixedly connected to a fixed plate (18), the fixed plate (18) is located directly below the connecting plate (27), and a plurality of spherical blocks 2 (26) are fixedly connected to the upper edge of the fixed plate (18) in a circular array around its center.

7. The rotatable spray head for a cooling tower spray device according to claim 5, characterized in that: The elastic component comprises a sliding column (30), the sliding column (30) is fixedly connected to the upper end of the round block (29), a fixed tube (32) is slidably sleeved on the outer wall of the sliding column (30), the upper end of the fixed tube (32) is fixedly connected to the inner top end of the truncated cone shell (8), a coil spring 2 (31) is fixedly connected between the upper end of the sliding column (30) and the inner top end of the truncated cone shell (8), and the coil spring 2 (31) is located on the inner side of the fixed tube (32).

8. The rotatable spray head for a cooling tower spray device according to claim 1, characterized in that: An annular groove (33) is provided on the outer wall of the water spray pipe (14), and the gear ring (3) and the connecting ring (4) are both slidably matched with the annular groove (33).

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