Spraying device for tube box at lower end of air cooler

Abstract

According to the spraying device for the air cooler lower end pipe box, automatic spraying can be carried out on a pipe opening of the air cooler lower end pipe box, and the spraying efficiency is improved. The air cooler lower end pipe box comprises a plurality of pipe openings, a first direction, a second direction and a third direction are defined, the first direction and the second direction are arranged at an angle and located on the same plane, and the third direction is perpendicular to the plane where the first direction and the second direction are located. The spraying pipe and the pipe opening are oppositely arranged in the third direction. The spraying device further comprises a first driving part, a second driving part and a third driving part, the first driving part is used for driving the main body frame to move in the first direction, the second driving part is used for driving the main body frame to move in the second direction, and the third driving part is used for driving the spraying pipes to move relative to the main body frame in the third direction so as to be inserted into the corresponding pipe openings for spraying operation. Therefore, a traditional manual spraying mode is replaced, and the spraying efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air coolers, and in particular to a spraying device for a lower end pipe box of an air cooler. Background Art

[0002] In the power industry, the air-cooling island, as an important part of the power plant, undertakes the key heat dissipation task, especially suitable for arid areas or water scarce environments. The air-cooling island cools the working fluid through a series of air coolers. These air coolers are usually composed of a large number of closely arranged metal tube bundles. Their working principle is to transfer the heat of the working fluid (such as cooling water) to the surrounding air to achieve the heat dissipation effect. However, in the actual operation process, the cooling water often corrodes the tube bundle at the water inlet of the lower end of the air cooler. This not only affects the heat dissipation efficiency of the air cooler, but may also cause equipment failure, increase maintenance costs, and even affect the safe and stable operation of the entire power plant. Traditionally, the anti-corrosion measures for the air cooler tube bundle mostly rely on manual spraying to paint the tube bundle to achieve anti-corrosion of the tube mouth, but the efficiency of manual spraying is low. Utility Model Content

[0003] The utility model aims to provide a spraying device for a lower end pipe box of an air cooler. Through the spraying device in the application, the pipe opening of the lower end pipe box of the air cooler can be automatically sprayed, thereby improving the spraying efficiency.

[0004] To achieve the above-mentioned purpose, the utility model provides a spraying device for a lower end pipe box of an air cooler, wherein the lower end pipe box comprises a plurality of pipe groups, each of the pipe groups comprises at least one pipe bundle, the pipe bundle has a pipe opening, and defines a first direction, a second direction and a third direction, the first direction and the second direction are arranged at an angle and are located in the same plane, the third direction is perpendicular to the plane where the first direction and the second direction are located, the spraying device comprises a main frame and a nozzle connected to the main frame, the nozzle and the pipe opening are arranged relative to each other along the third direction; and further comprises a first driving member, a second driving member and a third driving member, the first driving member is used to drive the main frame to move along the first direction, the second driving member is used to drive the main frame to move along the second direction, and the third driving member is used to drive the nozzle to move relative to the main frame along the third direction to insert into the corresponding pipe opening for spraying operation, thereby replacing the traditional manual spraying method and significantly improving the spraying efficiency.

[0005] Optionally, it also includes a mobile platform; the mobile platform is located in the main frame and is drivingly connected to the third driving member, and part of the nozzle is located in the main frame and fixed to the mobile platform, and part is located outside the main frame.

[0006] In this way, the space occupied by the spraying device in the third direction is reduced.

[0007] Optionally, the mobile platform forms a sliding fit with the inner wall of the main frame, so that no other guiding devices are required, thereby improving the functional integration of the main frame.

[0008] Optionally, it comprises a driving disk drivingly connected to the output end of the third driving member and a connecting rod hinged to the driving disk, and the other end of the connecting rod is hinged to the side wall of the mobile platform;

[0009] The rotation axis of the driving disk extends along the second direction, and the position where the connecting rod is hinged to the driving disk is spaced from the rotation center of the driving disk. In this way, the driving disk and the connecting rod can form a crank mechanism to simplify the structure of the spraying device.

[0010] Optionally, the mobile platform further contains a compressed gas tank, the compressed gas tank is connected to the spray pipe, and a valve is provided between the compressed gas tank and the spray pipe. In this way, the opening and closing of the compressed gas tank can be controlled by the valve, so that the paint is sprayed outward.

[0011] Optionally, in the third direction, the compressed gas tank is arranged on the top surface of the mobile platform, and the nozzle is fixed on the bottom surface of the mobile platform. Such a layout can avoid interference between the pipeline connecting the compressed gas tank and the nozzle and various components in the main frame.

[0012] Optionally, it further comprises a supporting slide rail, two side slide rails and a slide frame slidably matched with the corresponding side slide rails, the two side slide rails extend along the first direction, and in the second direction, each tube group is located between the two side slide rails; the supporting slide rail extends along the second direction and is fixedly connected to the slide frame on the corresponding side;

[0013] The main frame is arranged between the two slides, the support rail passes through the main frame, a support slider is fixed in the main frame, and the main frame slides along the support rail through the support slider under the driving of the second driving member. In this way, the integration of the spraying device can be improved, the space occupied by the spraying device can be reduced, and the size of the spraying device can be reduced.

[0014] Optionally, the carriage is connected to the first driving member via a synchronous belt, which is a simpler and more reliable transmission method.

[0015] Optionally, the two slides are both provided with synchronous wheels, and the two synchronous wheels are provided with synchronous belts;

[0016] A second driving member and a driving rotation block drivingly connected to an output end of the second driving member are disposed within the main body frame. The driving rotation block is engaged with the synchronous belt, and the driving rotation block rotates under the action of the second driving member. Accordingly, on the basis of making full use of the internal space of the main body frame, the size of the main body frame can be reduced.

[0017] Optionally, a coating portion is further disposed on an outer wall of the nozzle. The coating portion is made of a flexible material and can form a more uniform coating on an inner wall of the nozzle opening.

[0018] Other features and advantages of the present specification will become clear through the following detailed description of the exemplary embodiments of the present specification with reference to the accompanying drawings. Description of the Drawings

[0019] The drawings incorporated in and constituting a part of the specification illustrate embodiments of the specification and, together with the description, are used to explain the principles of the specification.

[0020] Figure 1 is a schematic structural diagram of a spraying device in an embodiment of the present utility model;

[0021] Figure 2 is Figure 1 a partial structural diagram of, with the side slide rail hidden;

[0022] Figure 3 is Figure 1 a partial structural diagram of, with the main body frame hidden;

[0023] Figure 4 is a cross-sectional view of the side slide rail;

[0024] Figure 5 is a partial structural diagram of the main body frame;

[0025] Figure 6 is a cross-sectional view of the main body frame;

[0026] Figure 7 is a partial cross-sectional view of the main body frame, with the compressed air tank hidden;

[0027] Figure 8 is a partial cross-sectional view of the nozzle.

[0028] Reference Numerals:

[0029] 10 - main body frame; 101 - box board; 102 - window; 103 - slider mounting bracket; 104 - motor mounting bracket;

[0030] 201 - second driving member; 202 - second synchronous pulley; 203 - support slider; 204 - support slide rail; 205 - carriage; 206 - driving rotation block; 207 - second synchronous belt;

[0031] 301 - First driving member; 303 - Side slide rail; 304 - Transmission block; 305 - First synchronous pulley; 306 - First synchronous belt;

[0032] 40 - Spray pipe; 401 - Coating part; 402 - Pipe cap; 403 - Branch pipeline;

[0033] 50 - Moving platform; 501 - Third driving member; 502 - Driving disk; 503 - Connecting rod;

[0034] 60 - Compressed air tank; 601 - Fourth driving member; 602 - Driving gear; 603 - Driven gear; 604 - Ball valve; 605 - Main pipeline; 607 - Air outlet; 608 - Snap ring. Detailed implementation mode

[0035] In order to enable those skilled in the art to better understand the solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation modes.

[0036] Please refer to Figures 1 - 8 , Figure 1 which is a schematic structural diagram of the spraying device in the embodiment of the present utility model; Figure 2 is Figure 1 a partial structural diagram of Figure 3 is Figure 1 a partial structural diagram of Figure 4 is a sectional view of the side slide rail; Figure 5 is a partial structural diagram of the main body frame; Figure 6 is a sectional view of the main body frame; Figure 7 is a partial sectional view of the main body frame, with the compressed air tank hidden; Figure 8 is a partial sectional view of the spray pipe.

[0037] As shown in the figure, the lower end pipe box includes a plurality of pipe groups, the pipe groups are arranged along the first direction, each pipe group includes at least two pipe bundles, the pipe bundles have pipe orifices, and the two pipe orifices in the same pipe group are arranged along the second direction. The first direction and the second direction are in the same plane and are arranged at an angle. The direction perpendicular to the plane where the first direction and the second direction are located is defined as the third direction. The spraying device includes a main body frame 1 and a spray pipe 40 connected to the main body frame 1; it further includes a first driving member 301, a second driving member 201 and a third driving member 501. The first driving member 301 is used to drive the main body frame 1 to move along the first direction, the second driving member 201 is used to drive the main body frame 1 to move along the second direction, and the third driving member 501 is used to drive the spray pipe 40 to move relative to the main body frame 1 along the third direction so as to insert into the corresponding pipe orifice to perform a spraying operation on the inner wall of the pipe orifice.

[0038] This method can replace the manual spraying method, realize the automation of spraying, and improve the efficiency of spraying.

[0039] The specific structure of the spraying device in this application is described below with reference to specific embodiments.

[0040] In this embodiment, the spraying device also includes a supporting slide rail 204, two side slide rails 303 and a slide rack 205 slidably matched with the corresponding side slide rails 303, the two side slide rails 303 extend along the first direction, and in the second direction, each tube group is located between the two side slide rails 303; the supporting slide rail 204 extends along the second direction and is fixedly connected to the slide rack 205 on the corresponding side; the main frame 1 is arranged between the two slide racks 205, the supporting slide rail 204 passes through the main frame 1, and a supporting slider 203 is fixed in the main frame 1, the supporting slider 203 is transmission-connected to the second driving member 201, and the supporting slider 203 slidably matches with the supporting slide rail 204.

[0041] Specifically, the side slide rails 303 are box-shaped structures, and each side slide rail 303 is provided with sprockets at both ends of its extension direction. The rotation axis of the sprockets extends along the third direction, and one of the sprockets is connected to the output shaft of the first driving member 301 for transmission. The first driving member 301 is, for example, a stepping motor. A chain is connected between the two sprockets to form a rotation along the first direction; the slide 205 is fitted with the end face of the side slide rail 303 in the third direction, and the side slide rail 303 is provided with a slideway, which runs through the end face of the side slide rail 303. A transmission block 304 is provided at the bottom end of the first slideway, and the transmission block 304 extends into the side slide rail 303 through the slideway and is connected to the chain. The chain may be provided with an adapter, which is connected to the chain through the adapter. Specifically, in order to realize the forward and backward movement of the slide 205 in the first direction, the adapter is fixedly connected to one side of the chain, and the forward and backward movement of the slide 205 in the first direction is realized by the forward and reverse rotation of the output shaft of the first driving member 301.

[0042] Of course, in this embodiment, a belt drive can be formed between the slide 205 and the first driving member 301. In the above embodiment, the sprocket can be replaced by the first synchronous wheel 305, and the chain can be replaced by the first synchronous belt 306. The first synchronous belt 306 and the first synchronous wheel 305 form a transmission by meshing. The inner surface of the first synchronous belt 306 is provided with side teeth, and the side teeth are meshed with the corresponding tooth grooves on the first synchronous wheel 305 to transmit power. In order to drive the slide 205 to move, the transmission block 304 is meshed with the side teeth on one side of the first synchronous belt 306, or the transmission block 304 and the first synchronous belt 306 are fixedly connected by a fixing member.

[0043] In the example shown in the figure, the slide 205 is a rectangular structure, the side that cooperates with the side slide rail 303 is the short side, and the side perpendicular to the side slide rail 303 is the long side. A support beam is arranged between the two long sides. The support beam is parallel to the short side and has a certain height with the side slide rail 303. The support beam is used to support the main frame 1. The height of the support beam is set by technicians in this field according to the height of the nozzle 40, so as to ensure that the nozzle 40 does not interfere with the nozzles during the movement.

[0044] The two support beams located on the two slides 205 are at the same height from the slides 205, the support rails 204 extend along the second direction and are fixedly connected to the two support beams, the support beams support the main frame 1 through the support rails 204, specifically, a support slider 203 is also provided in the main frame 1, the support slider 203 is fixedly connected to the main frame 1, the support rails 204 penetrate the main frame 1 in its extension direction, the part of the support rails 204 located in the main frame 1 forms a sliding fit with the support slider 203, the support slider 203 is fixedly connected to the main frame 1 through the slider mounting frame 103, and the support slider 203 is located on the upper side of the support slider 204 in the third direction; the third driving member 501 is transmission connected to the support slider 203, specifically, it can be transmission connected by belt drive.

[0045] In this embodiment, a second synchronous wheel 202 is arranged on the short side of the two slides 205 located on the upper side, a second synchronous belt 207 is arranged between the two second synchronous wheels 202, and the third driving member 501 is fixedly connected to the main frame 1, and drives the main frame 1 as a whole to move along the second direction through a driving block that meshes with the inner side of the second synchronous belt 207.

[0046] Specifically, a motor mounting frame 104 is provided in the main frame 1, and the motor mounting frame 104 is used to support the second driving member 201. The second driving member 201 is arranged on the motor mounting frame 104, and its output end passes through the motor mounting frame 104 and engages with the second synchronous belt 207 located at the lower side of the motor mounting frame 104 through a driving block 206 (which can also be a synchronous pulley). The driving block 206 is connected to the output shaft of the second driving member 201 and forms a follow-up rotation. In this embodiment, the direction of movement of the main frame 1 along the second direction is adjusted by adjusting the direction of the second driving member 201.

[0047] In each of the above-mentioned embodiments, the spraying device also includes a mobile platform 50; the mobile platform 50 is located in the main frame 1 and is transmission-connected to the third driving member 501, and part of the nozzle 40 is located in the main frame 1 and fixed to the mobile platform 50, and part of it is located outside the main frame 1.

[0048] The mobile platform 50 extends along the plane where the first direction and the second direction are located, that is, it is roughly arranged along the plane parallel to the short side of the main frame 1, so that the mobile platform 50 divides the main frame 1 into an upper area and a lower area inside the main frame 1, and the upper area and the lower area are distributed up and down in the third direction, and the lower area is located between the upper area and the pipe mouth.

[0049] In this embodiment, one end of the nozzle 40 which is axially away from the nozzle orifice is located in the lower area and is fixedly connected to the mobile platform 50, and the other end is located outside the main frame 1. The main frame 1 and the mobile platform 50 form a guiding fit so that the mobile platform 50 can move in a third direction relative to the main frame 1 toward the nozzle or away from the nozzle under the limiting action of the main frame 1.

[0050] In a specific embodiment, the third driving member 501 is fixedly connected to the main frame 1, and the driving disk 502 is drivingly connected to the output shaft of the third driving member 501. The rotation axis of the driving disk 502 extends along the second direction. The driving disk 502 is also hinged with a connecting rod 503. The position where one end of the connecting rod 503 is hinged to the driving disk 502 is spaced from the rotation center, and the other end is hinged to the mobile platform 50. In this way, when the driving disk 502 rotates along the first direction, it can drive the mobile platform 50 to move downward. When the driving disk 502 rotates in the opposite direction, that is, the second direction, it can drive the mobile platform 50 to move upward, thereby driving the nozzle 40 to enter and exit the nozzle. Specifically, the driving disk 502 is a gear, and the rotation center of the gear is connected to the output shaft of the third driving member 501 through a key. The gear and the connecting rod 503 form a crank slider mechanism to drive the mobile platform 50 to reciprocate up and down along the third party. At this time, when the end of the connecting rod 503 connected to the mobile platform 50 moves to the lowest point in the radial direction of the gear, the nozzle 40 is located in the nozzle. When the end of the connecting rod 503 connected to the mobile platform 50 moves to the highest point in the radial direction of the gear, the nozzle 40 is away from the nozzle.

[0051] In some embodiments, the mobile platform 50 further contains a compressed gas tank 60, which is disposed on the mobile platform 50 and located in the upper region of the main frame 1, that is, in the third direction, the compressed gas tank 60 is disposed on the top surface of the mobile platform 50, and a nozzle 40 is fixed to the bottom surface of the mobile platform 50; the compressed gas tank 60 is connected to the nozzle 40, and a valve is disposed between the compressed gas tank 60 and the nozzle 40. The main frame 1 may be a box-shaped structure surrounded by a box plate 101, and the box plate 101 is provided with a window 102, and the window 102 is used to replace the compressed gas tank 60.

[0052] Specifically, a fourth driving member 601 is also provided on the mobile platform 50, and the fourth driving member 601 is used to open and close the valve, which is a ball valve 604. The air outlet 607 of the compressed gas tank 60 is connected to each nozzle 40 through an injection pipeline, and the injection pipeline includes a main pipeline 605 and a branch pipeline 403 connected to the main pipeline 605. Each branch pipeline 403 is connected to each nozzle 40 in a one-to-one correspondence to transport the paint to the nozzle located at each nozzle 40. The air inlet side of the main pipeline 605 is connected to the compressed gas tank 60. The main pipeline 605 is provided with a ball valve 604, which includes a valve core and a valve body. The valve core rotates in the valve body to switch the main pipeline 605 to be connected and disconnected. Optionally, the compressed gas tank 60 and the mobile platform 50 are detachably connected through a clamp ring 608, so as to facilitate the replacement of the compressed gas tank 60.

[0053] In this embodiment, in order to drive the valve core to rotate, a fourth driving member 601 is further provided on the mobile platform 50. The fourth driving member 601 is connected to the driving rod through a gear set (a driving gear 602 connected to the fourth driving member 601 and a driven gear 603 meshing with the driving gear 602). The driving rod is connected to the valve core. When the driving rod rotates under the belt of the fourth driving member 601, the valve core can be driven to rotate to connect or disconnect the main line 605.

[0054] Optionally, a spray channel is provided inside the nozzle 40, the spray channel penetrates the outer wall of the nozzle 40 to form a spray port, and the outlet of the branch pipeline 403 is connected to the spray channel to deliver the paint into the spray channel. Alternatively, a cavity is formed inside the nozzle 40, and in order to seal the cavity, the nozzle 40 is provided with a pipe cover 402, the pipe cover 402 is used to seal the cavity, and the branch pipeline passes through the pipe cover 402 and communicates with the cavity, thereby delivering the paint into the cavity.

[0055] In order to further increase the coating effect and uniformity, the outer wall of the nozzle 40 is further provided with a coating portion 401, which is made of a flexible material and can be a sponge sleeve, which is sleeved on the outer wall of the nozzle 40, or can be a brush. In another optional embodiment, the nozzle 40 can also rotate around its central axis, so as to further evenly coat the paint sprayed on the inner wall of the nozzle.

[0056] In an embodiment of the present application, the mobile platform 50 is provided with six nozzles 40 , and the six nozzles 40 are arranged in groups of two. The two nozzles 40 in the same group are distributed along the second direction, and the three nozzles 40 groups are distributed along the first direction.

[0057] During the operation of the spraying device, the main frame 1 moves in the first direction relative to the first guide rail so that each group of 40 spray nozzles corresponds to each pipe group one by one. Under the action of the second driving member 201, the main frame 1 moves in the second direction so that the spray nozzles 40 in the same group of 40 spray nozzles correspond to the pipe orifices in the same pipe group one by one. Then, under the action of the third driving member 501, the moving platform 50 is driven to move downward so that the spray nozzles 40 extend into the corresponding pipe orifices. The fourth driving member 601 starts to work, driving the ball valve 604 to the open position. The paint enters the spray nozzles 40 from the compressed air tank 60 and is sprayed out from the spray ports.

[0058] After the spraying operation on the corresponding pipe orifices, the fourth driving member 601 drives the ball valve 604 to close, and the third driving member 501 drives the moving platform 50 to move upward, withdrawing the spray nozzles 40 from the spray ports. Then, according to the workstations that need to be further sprayed, the first driving member 301 and the second driving member 201 are adjusted, and the positions of the main frame 1 in the first direction and the second direction are adjusted through the first driving member 301 and the second driving member 201, and this is repeated.

[0059] By adopting the technical solution in this application, the structure of the spraying device is simple and the operation is convenient. It can automatically change the working position and perform the anti-rust spraying operation on the pipe orifices at the lower pipe box of the air cooler, solving the problem that after many existing air coolers are used for a long time, the pipe orifices at the lower pipe box of the air cooler will corrode, resulting in the lower pipe box of the air cooler not being able to play a sealing role, and thus the phenomenon of water leakage of the air cooler occurs.

[0060] Of course, in addition to the above examples, the spraying operation of the spray nozzles 40 on the pipe orifices can also be achieved by setting high-pressure nozzles, negative pressure devices, etc. As long as it can form a spraying method for the paint, it falls within the protection scope of this solution.

[0061] In this article, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A spraying device for the lower tube box of an air cooler, the lower tube box of the air cooler comprising a plurality of tube groups, each tube group comprising at least one tube bundle, the tube bundle having a tube orifice, characterized in that, Define a first direction, a second direction, and a third direction. The first direction and the second direction are set at an angle and lie in the same plane. The third direction is perpendicular to the plane where the first direction and the second direction are located. The spraying device includes a main body frame (10) and a spray pipe (40) connected to the main body frame (10). The spray pipe (40) and the pipe orifice are arranged oppositely along the third direction. It further includes a first driving member (301), a second driving member (201), and a third driving member (501). The first driving member (301) is used to drive the main body frame (10) to move along the first direction. The second driving member (201) is used to drive the main body frame (10) to move along the second direction. The third driving member (501) is used to drive the spray pipe (40) to move relative to the main body frame (10) along the third direction to insert into the corresponding pipe orifice for spraying operation.

2. The spraying device for the lower tube box of the air cooler according to claim 1, characterized in that, It further includes a moving platform (50). The moving platform (50) is located inside the main body frame (10) and is in transmission connection with the third driving member (501). A part of the spray pipe (40) is located inside the main body frame (10) and is fixed to the moving platform (50), and a part is located outside the main body frame (10).

3. The spraying device for the lower tube box of the air cooler according to claim 2, wherein, The moving platform (50) forms a sliding fit with the inner wall of the main body frame (10).

4. The spraying device for the lower tube box of the air cooler according to claim 2, characterized in that, It includes a driving disk (502) in transmission connection with the output end of the third driving member (501) and a connecting rod (503) hinged to the driving disk (502). The other end of the connecting rod (503) is hinged to the side wall of the moving platform (50). The rotation axis of the driving disk (502) extends along the second direction. The position where the connecting rod (503) is hinged to the driving disk (502) is spaced from the rotation center of the driving disk (502).

5. The spraying device for the lower tube box of the air cooler according to claim 2, wherein, The moving platform (50) further houses a compressed air tank (60). The compressed air tank (60) is communicated with the spray pipe (40). A valve is provided between the compressed air tank (60) and the spray pipe (40).

6. The spraying device for the lower tube box of the air cooler according to claim 5, characterized in that, In the third direction, the compressed air tank (60) is arranged on the top end surface of the moving platform (50), and the spray pipe (40) is arranged on the bottom end surface of the moving platform (50).

7. The spraying device for the lower tube box of the air cooler according to any one of claims 1-6, characterized in that, It further includes a support slide rail (204), two side slide rails (303), and a carriage (205) slidably engaged with the corresponding side slide rails (303). Both of the two side slide rails (303) extend along the first direction. Each pipe group is located between the two side slide rails (303) in the second direction. The support slide rail (204) extends along the second direction and is fixedly connected to the corresponding carriage (205). The main frame (10) is arranged between the two slides (205), the support slide rail (204) passes through the main frame (10), a support slider (203) is fixed inside the main frame (10), and under the driving of the second driving member (201), the main frame (10) slides along the support slide rail (204) through the support slider (203).

8. The spraying device for the lower tube box of the air-cooled heat exchanger according to claim 7, characterized in that, The slide (205) and the first driving member (301) are connected in transmission via a synchronous belt.

9. The spraying device for the lower tube box of the air cooler according to claim 7, characterized in that, The two slides (205) are both provided with synchronous wheels, and the two synchronous wheels are provided with synchronous belts; The main frame (10) is provided with the second driving member (201) and a driving block (206) drivingly connected to the output end of the second driving member (201); the driving block (206) is meshed with the synchronous belt; the driving block (206) rotates under the action of the second driving member (201).

10. The spraying device for the lower tube box of the air cooler according to claim 9, characterized in that, The outer wall of the nozzle (40) is provided with a plurality of nozzles, and the nozzles are distributed along the axial direction of the nozzle (40); and / or the nozzles are distributed along the circumferential direction of the nozzle (40).

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