Cooling device for formaldehyde solution production

Abstract

The invention relates to the field of cooling devices, in particular to a cooling device for formaldehyde solution production, which comprises a cooling component and a closed cooling tower main body, a plurality of coil pipes are fixedly connected in the closed cooling tower main body through a support plate, and the right ends of the plurality of coil pipes are connected with a water storage box; the cleaning component comprises a first arc-shaped ring arranged outside the coil pipe, a second arc-shaped ring is arranged on the first arc-shaped ring through a storage part, cleaning parts used for cleaning the coil pipe are arranged on the first arc-shaped ring and the second arc-shaped ring correspondingly, and a power part used for providing power for movement of the first arc-shaped ring is arranged on the inner wall of the closed cooling tower body. A shielding part is arranged on the outer side of the power part to prevent water from entering the power part; and the transposition component comprises a cylinder which is arranged on the first arc-shaped ring and is provided with two open ends. According to the device, the coil pipe can be automatically and rapidly washed, manual operation is not needed, manpower is saved, the washing efficiency is improved, and the cooling effect of the closed cooling tower is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of cooling devices, in particular to a cooling device for producing formaldehyde solution. Background Art

[0002] In the formaldehyde production process, methanol and oxygen undergo an oxidation reaction under the action of a catalyst. This process releases a large amount of heat. In order to avoid material rushing into the reactor and causing material loss, the formaldehyde solution needs to be cooled, and the most common device is a closed cooling tower.

[0003] During use, the existing closed cooling tower is provided with a coil, and the formaldehyde solution passes through the coil, and then the spray system of the closed cooling tower sprays water on the coil to achieve heat exchange and thus cooling. After a period of use, scale will form on the coil, affecting the heat exchange effect and further affecting the cooling effect. The existing closed cooling tower cannot automatically wash the scale, and workers are required to disassemble the side panels of the closed cooling tower, and then spray the solvent and use a brush to wash the coil. Since there are multiple coils and a curved part in the middle, the space makes cleaning inconvenient and takes a long time. Therefore, how to automatically wash the coil and automatically remove the scale becomes a problem that needs to be solved. Summary of the invention

[0004] In view of the fact that the closed cooling tower in the above or prior art cannot automatically wash scale, workers are required to disassemble the side panels of the closed cooling tower, spray solvent and then use a brush to wash the coil, and this process is cumbersome and time-consuming, the present invention is proposed.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: comprising a cooling component, comprising a closed cooling tower body, wherein a plurality of coils are fixedly connected in the closed cooling tower body through a support plate, and a water storage box is connected to the right end of the plurality of coils; a cleaning component, comprising a first arc ring arranged outside the coil, a second arc ring is arranged on the first arc ring through a storage portion, and a cleaning portion for cleaning the coil is provided on the first arc ring and the second arc ring, a power portion for providing power for the movement of the first arc ring is provided on the inner wall of the closed cooling tower body, and a shielding portion is provided on the outer side of the power portion to prevent water from entering the power portion; a displacement component, comprising a cylinder with open ends arranged on the first arc ring, a clamping portion and a loosening portion for locking the cylinder are connected to the left end of the cylinder, a toggle portion is fixedly connected to the front end of the cylinder, and an elastic portion cooperating with the toggle portion is provided on the first arc ring and the second arc ring.

[0006] As a preferred embodiment of the cooling device for formaldehyde solution production of the present invention, the receiving portion includes a receiving groove arranged in the first arc ring, and the second arc ring extends into the receiving groove and is elastically connected to the inner wall of the receiving groove through a first spring.

[0007] As a preferred solution of the cooling device for formaldehyde solution production of the present invention, the cleaning part comprises an arc-shaped sheet arranged on the first arc-shaped ring and the second arc-shaped ring, and a brush is fixedly connected to the arc-shaped sheet.

[0008] As a preferred embodiment of the cooling device for formaldehyde solution production of the present invention, the upper end surface of the first arc ring is flush with the lower end surface of the support plate, the second arc ring can be completely received in the receiving groove, a distance is left between the second arc ring and the inner wall of the receiving groove to accommodate a brush, and the first arc ring and the second arc plate cooperate to form a circular ring with a diameter larger than the diameter of the coil.

[0009] As a preferred embodiment of the cooling device for formaldehyde solution production of the present invention, the power unit includes an electric guide rail arranged on the inner wall of the closed cooling tower body, the trajectory of the electric guide rail is the same as the trajectory of the coil, a slider is slidably connected to the electric guide rail, a support rod is rotatably connected to the slider, the support rod is fixedly connected to the first arc ring at the front end, and multiple first arc rings are fixedly connected by connecting rods.

[0010] As a preferred embodiment of the cooling device for formaldehyde solution production of the present invention, the shielding portion includes a bearing plate arranged on the inner wall of a closed cooling tower body, a U-shaped plate is fixedly connected to the top of the closed cooling tower body, an electric slide rail is provided on the inner wall of the U-shaped plate, a slide bar is slidably connected to the electric slide rail, a support is fixedly connected to the slide bar, and a foldable water retaining cloth is provided on the support.

[0011] As a preferred embodiment of the cooling device for formaldehyde solution production of the present invention, the engaging portion includes an installation cavity arranged in a first arc ring, the first arc ring is provided with a connecting port for the cylinder to enter the installation cavity, a stop ring is fixedly connected to the cylinder, the stop ring is elastically connected to the inner wall of the installation cavity through a second spring, a support column is fixedly connected in the installation cavity, a first truncated cone is fixedly connected to the support column, an inner groove is provided on the inner wall of the cylinder, a wedge block is slidably connected in the inner groove, and the wedge block is elastically connected to the inner wall of the inner groove through a telescopic spring.

[0012] As a preferred embodiment of the cooling device for formaldehyde solution production of the present invention, the loosening portion includes a second frustum slidably connected to the support column, the first frustum and the second frustum are arranged opposite to each other, and the second frustum is elastically connected to the inner wall of the installation cavity through a third spring.

[0013] As a preferred solution of the cooling device for formaldehyde solution production of the present invention, the shifting part comprises a shifting block fixedly connected to the cylinder, and the arc-shaped sheet is provided with a notch matched with the shifting block.

[0014] As a preferred embodiment of the cooling device for formaldehyde solution production of the present invention, the following is provided: the elastic part includes arc-shaped grooves provided on the first arc-shaped ring and the second arc-shaped ring. An arc-shaped block fixed to an arc-shaped piece is slidably connected in the arc-shaped groove, and the arc-shaped block is elastically connected to the inner wall of the arc-shaped groove through a fourth spring.

[0015] The beneficial effects of the cooling device for formaldehyde solution production of the present invention are as follows: By providing a cleaning component, when the electric guide rail is started, it can drive multiple brushes to clean the coil pipes simultaneously, scrubbing the side walls of the coil pipes. There is no need for workers to scrub the coil pipes one by one, which is convenient and faster in operation. At the same time, by providing a position-changing component, the position of the brushes can be moved, making the scrubbing of the side walls of the coil pipes more comprehensive and achieving a better scale removal effect. Thus, it solves the problem that the main body of the closed cooling tower cannot automatically scrub the scale, and workers still need to disassemble the side plates of the main body of the closed cooling tower, then spray the solvent and use a brush to scrub the coil pipes. This process is troublesome and takes a long time, and achieves the effect of automatically and quickly removing the scale in the main body of the closed cooling tower without manual scrubbing of the coil pipes by workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the external structure of the cooling device for formaldehyde solution production.

[0018] Figure 2 It is a schematic diagram of the internal structure of the closed cooling tower main body of the cooling device for formaldehyde solution production.

[0019] Figure 3 It is an exploded view of the power part of the cooling device for formaldehyde solution production.

[0020] Figure 4 For Figure 3 The enlarged schematic diagram of the structure at A of

[0021] Figure 5 It is a schematic diagram of the external structure of the cleaning part of the cooling device for formaldehyde solution production.

[0022] Figure 6 It is a schematic cross-sectional view of the elastic part of the cooling device for formaldehyde solution production.

[0023] Figure 7 It is a schematic cross-sectional view of the engaging part of the cooling device for formaldehyde solution production.

[0024] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at B.

[0025] In the figure: 10, closed cooling tower body; 11, support plate; 12, coil; 13, water storage box; 20, first arc ring; 21, storage part; 211, receiving groove; 212, first spring; 22, second arc ring; 23, cleaning part; 231, arc sheet; 232, brush; 24, power part; 241, electric guide rail; 242, slider; 243, support rod; 25, shielding part; 251, bearing plate; 252, U-shaped plate; 253, electric slide rail; 25 4. Pillar; 255. Folding water retaining cloth; 30. Cylinder; 31. Engaging part; 311. Mounting cavity; 312. Stop ring; 313. Support column; 314. First truncated cone; 315. Inner groove; 316. Wedge-shaped block; 317. Telescopic spring; 32. Loosening part; 321. Second truncated cone; 322. Third spring; 33. Driving part; 331. Driving block; 332. Notch; 34. Elastic part; 341. Arc groove; 342. Arc block; 343. Fourth spring. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] Example 1, reference Figures 1 to 6 , which is the first embodiment of the present invention, and provides a cooling device for the production of formaldehyde solution, which can achieve the effect of automatically washing the side wall of the coil 12, and includes a cooling component, including a closed cooling tower body 10, a plurality of coils 12 are fixedly connected to the closed cooling tower body 10 through a support plate 11, and a water storage box 13 is connected to the right end of the plurality of coils 12; a cleaning part 23, including a first arc ring 20 arranged outside the coil 12, a second arc ring 22 is arranged on the first arc ring 20 through a receiving part 21, and the first arc ring 20 and the second arc ring 22 are both provided with A cleaning portion 23 is provided for cleaning the coil 12. A power portion 24 for providing power for the movement of the first arc-shaped ring 20 is provided on the inner wall of the closed cooling tower body 10. A shielding portion 25 is provided on the outer side of the power portion 24 to prevent water from entering the power portion 24. A displacement component comprises a cylinder 30 with open ends arranged on the first arc-shaped ring 20. A clamping portion 31 and a loosening portion 32 for locking the cylinder 30 are connected to the left end of the cylinder 30. A toggle portion 33 is fixedly connected to the front end of the cylinder 30. An elastic portion 34 cooperating with the toggle portion 33 is provided on both the first arc-shaped ring 20 and the second arc-shaped ring 22.

[0028] Specifically, multiple coil pipes 12 are provided here, and multiple rows of pipes are arranged side by side. Support plates 11 are provided at both the upper and lower ends of the coil pipes 12. The lower side wall of the upper support plate 11 is welded to the upper side wall of the coil pipe 12 (of course, welding is not limited here, as long as the coil pipe 12 can be fixed). To fix the coil pipe 12, a sprinkler is also provided on the main body 10 of the closed cooling tower, which can spray water onto the coil pipe 12 to achieve cooling. This is prior art and will not be elaborated here.

[0029] Furthermore, the storage part 21 includes a receiving groove 211 provided in the first arc-shaped ring 20. The second arc-shaped ring 22 extends into the receiving groove 211 and is elastically connected to the inner wall of the receiving groove 211 through a first spring 212. The cleaning part 23 includes arc-shaped pieces 231 provided on the first arc-shaped ring 20 and the second arc-shaped ring 22, and a brush 232 is fixedly connected to the arc-shaped piece 231. The upper end surface of the first arc-shaped ring 20 is flush with the lower end surface of the support plate 11. The second arc-shaped ring 22 can be completely received into the receiving groove 211. A gap is left between the second arc-shaped ring 22 and the inner wall of the receiving groove 211 to accommodate the brush 232. The first arc-shaped ring 20 and the second arc-shaped plate cooperate to form a ring with a diameter larger than the diameter of the coil pipe 12.

[0030] Among them, the first spring 212 is connected to a power source here. Thus, when it is necessary for the second arc-shaped ring 22 to retract into the receiving groove 211 of the first arc-shaped ring 20, only the first spring 212 needs to be electrified and contracted. The gap left between the second arc-shaped ring 22 and the inner wall of the receiving groove 211 here is sufficient to prevent the brush 232 from getting stuck with the side wall of the first arc-shaped ring 20, causing the second arc-shaped ring 22 to be unable to retract into the receiving groove 211.

[0031] Preferably, the power part 24 includes an electric guide rail 241 provided on the inner wall of the main body 10 of the closed cooling tower. The trajectory of the electric guide rail 241 is the same as the trajectory of the coil pipe 12. A slider 242 is slidably connected to the electric guide rail 241. A support rod 243 is rotatably connected to the slider 242. The support rod 243 is fixedly connected to the front first arc-shaped ring 20. Multiple first arc-shaped rings 20 are fixedly connected to each other through connecting rods.

[0032] It should be noted that the slider 242 here can also be a slide rod, so as to slide better in the electric guide rail 241. The trajectory of the electric guide rail 241 here is the same as the trajectory of the coil pipe 12, which can drive the support rod 243 to move along the trajectory of the coil pipe 12, and through transmission, the brush 232 can move along the trajectory of the coil pipe 12.

[0033] During use, when it is necessary to clean the scale on the coil 12, only the water at the bottom of the closed cooling tower main body 10 needs to be drained, and then the prepared solvent is poured into the bottom of the closed cooling tower main body 10. The sprayer is started to allow the solvent to contact the scale on the side wall of the coil 12 for dozens of seconds (the waiting time varies according to the type of solvent). Then, the electric guide rail 241 is started, causing the slider 242 to move, driving the support rod 243 to move. Since the trajectory of the electric guide rail 241 is the same as that of the coil 12, the support rod 243 moves to drive the first arc ring 20 to extend and move along the coil 12. The arc-shaped pieces 231 on the first arc ring 20 and the second arc ring 22 move, driving the brush 232 to clean the pipe wall of the coil 12. Multiple first arc rings 20 are provided here, so that multiple coils 12 can be cleaned simultaneously;

[0034] When the second arc ring 22 moves to the position of the support plate 11, at this time the second arc ring 22 is at the upper end, the first spring 212 is energized to make the first spring 212 contract (for two adjacent turns of the first spring 212, since the current directions are the same, according to the principle that like currents attract each other, an attractive force will be generated between each turn of the first spring 212, and this attractive force will cause the first spring 212 to contract). Here, the current passed through the first spring 212 is sufficient to ensure that it can contract and make the second arc ring 22 retract into the receiving groove 211. Thus, when passing through the support plate 11, since the second arc ring 22 is completely retracted into the receiving groove 211, there will be no collision between the second arc ring 22 and the support plate 11, resulting in the phenomenon that the entire first arc ring 20 cannot move. When the first arc ring 20 moves to the leftmost end of the coil 12, since the coil 12 is arc-shaped, the first arc ring 20 will deflect, causing the second arc ring 22 to move downward. Here, the support rod 243 is rotatably connected to the slider 242, and there will be no phenomenon that the first arc ring 20 is stuck with the arc edge of the coil 12. Then, when moving to the rightmost end of the coil 12 and passing through the arc of the coil 12, the second arc ring 22 moves upward again until it moves to the lowermost layer of the coil 12, and the second arc ring 22 moves downward to facilitate the second arc ring 22 to be received into the receiving groove 211 and cooperate with the support plate 11 at the bottom. It should be noted that here, only an odd number of arcs need to be set for the coil 12 to ensure that when reaching the bottom of the coil 12, the second arc ring 22 moves downward, thereby completing the scrubbing of the entire side wall of the coil 12 and automatically removing the scale.

[0035] In summary, by setting up the cleaning part 23, the solvent can be automatically sprayed, and the side wall of the coil 12 can be automatically scrubbed to remove the scale, ensuring the heat exchange efficiency of the closed cooling tower main body 10 and the cooling effect. Moreover, during the process of scrubbing the coil 12, there is no need for manual scrubbing, and the operation is convenient.

[0036] Example 2, refer to Figures 1 to 6, which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a shielding part 25 for the cooling device used in the production of formaldehyde solution, solving the problem of how to prevent water from entering the electric guide rail 241 when the electric guide rail 241 is not in use. It includes a shielding part 25, which includes a bearing plate 251 arranged on the inner wall of the closed cooling tower main body 10. A U-shaped plate 252 is fixedly connected to the top inside the closed cooling tower main body 10. An electric slide rail 253 is arranged on the inner wall of the U-shaped plate 252. A slide bar is slidably connected to the electric slide rail 253. A support column 254 is fixedly connected to the slide bar. A folding water blocking cloth 255 is arranged on the support column 254.

[0037] Specifically, creases are provided on the folding water blocking cloth 255. When the support column 254 moves, it can automatically fold along the creases to realize the storage of the folding water blocking cloth 255. The setting of the U-shaped plate 252 makes it not easy for water to enter the electric slide rail 253 and extends the service life of the electric slide rail 253.

[0038] During use, when the electric guide rail 241 is not in use, since the electric guide rail 241 faces the coil 12, the water splashed when water drops onto the coil 12 will directly enter the electric guide rail 241. To prevent water, the electric slide rail 253 is started, causing the slide bar to move, driving the support column 254 to move, and causing the folding water blocking cloth 255 to open to shield the electric guide rail 241, preventing water from directly splashing into the electric guide rail 241 and causing damage to the electric guide rail 241. Here, a sealing strip is provided on the inner wall of the U-shaped plate 252 to waterproof the electric slide rail 253. And since the electric slide rail 253 is arranged inside the U-shaped plate 252, water will not directly enter the electric slide rail 253, so there is no need to consider the problem of water entering the electric slide rail 253.

[0039] In summary, by providing the shielding part 25, when the electric guide rail 241 is not in use, a folding cloth is also provided to shield the electric guide rail 241, preventing water droplets from falling onto the coil 12 and splashing into the electric guide rail 241, causing damage to the electric guide rail 241, thereby extending the service life of the electric guide rail 241.

[0040] Embodiment 3, refer to Figures 1 to 8, which is the third embodiment of the present invention. Different from the previous embodiment, this embodiment provides a transposition component of a cooling device for formaldehyde solution production, which solves the problem of how to make the coil 12 clean more comprehensively. It includes a clamping portion 31, including a mounting cavity 311 arranged in the first arc ring 20, the first arc ring 20 is provided with a connecting port for the cylinder 30 to enter the mounting cavity 311, and a stop ring 312 is fixedly connected to the cylinder 30. The stop ring 312 is elastically connected to the inner wall of the mounting cavity 311 through a second spring. The mounting cavity 31 The cylinder 30 is fixedly connected with a support column 313, and a first truncated cone 314 is fixedly connected to the support column 313. An inner groove 315 is provided on the inner wall of the cylinder 30, and a wedge block 316 is slidably connected in the inner groove 315. The wedge block 316 is elastically connected to the inner wall of the inner groove 315 through a telescopic spring 317. The release portion 32 includes a second truncated cone 321 slidably connected to the support column 313. The first truncated cone 314 and the second truncated cone 321 are arranged opposite to each other, and the second truncated cone 321 is elastically connected to the inner wall of the installation cavity 311 through a third spring 322.

[0041] Specifically, a spacing greater than the width of the wedge block 316 is provided between the first cone 314 and the second cone 321, so that the wedge block 316 can be accommodated. The cylinder 30 here cooperates with the water storage box 13. Each time when it reaches the uppermost and lowermost ends of the coil 12, it can abut against the water storage box 13, thereby driving the cylinder 30 to move.

[0042] Furthermore, the shifting portion 33 includes a shifting block 331 fixedly connected to the cylinder 30, and a notch 332 cooperating with the shifting block 331 is provided on the arc-shaped piece 231; the elastic portion 34 includes an arc-shaped groove 341 arranged on the first arc-shaped ring 20 and the second arc-shaped ring 22, and an arc-shaped block 342 fixed to the arc-shaped piece 231 is slidably connected in the arc-shaped groove 341, and the arc-shaped block 342 is elastically connected to the inner wall of the arc-shaped groove 341 through a fourth spring 343. The setting of the shifting block 331 and the notch 332 on the arc-shaped piece 231 can prevent the shifting block 331 and the arc-shaped piece 231 from getting stuck.

[0043] During use, due to the gaps between adjacent brushes 232, when the brushes 232 move to wash the coil pipe 12, some parts of the coil pipe 12 cannot be washed due to the existence of the gaps. When the first arc-shaped ring 20 moves close to the lower water storage box 13, the cylinder 30 abuts against the side wall of the water storage box 13. At this time, the cylinder 30 moves towards the installation cavity 311, the stop ring 312 moves, the second spring elongates, the movement of the cylinder 30 drives the block 331 to move towards the arc-shaped piece 231 and pushes the arc-shaped piece 231, causing the arc-shaped block 342 to move and the spring to deform. When the arc-shaped piece 231 moves, the brushes 232 on the arc-shaped piece 231 will also change their positions, so that the brushes 232 are located in the gaps between the previous adjacent brushes 232. Therefore, when the first arc-shaped ring 20 resets, the gaps can be washed, making the washing of the coil pipe 12 more comprehensive. While the cylinder 30 is moving, the wedge-shaped block 316 on the cylinder 30 abuts against the first frustum 314, causing the telescopic spring 317 to be compressed. When the wedge-shaped block 316 moves between the first frustum 314 and the second frustum 321, under the action of the telescopic spring 317, the wedge-shaped block 316 resets. At this time, the non-inclined surface of the wedge-shaped block 316 abuts against the left end face of the first frustum 314, so that the wedge-shaped block 316 cannot reset, making the cylinder 30 unable to reset, and the block 331 always cooperates with the arc-shaped piece 231 to prevent the arc-shaped piece 231 from automatically resetting when the first arc-shaped ring 20 resets;

[0044] When the first arc-shaped ring 20 resets to the initial position, the cylinder 30 abuts against the upper water storage box 13. At this time, the wedge-shaped block 316 on the cylinder 30 moves towards the second frustum 321. At this time, the hypotenuse of the wedge-shaped block 316 abuts against the bottom side wall of the second frustum 321. When the telescopic spring 317 deforms, the wedge-shaped block 316 moves to the side wall of the second frustum 321 and abuts against the side wall of the second frustum 321. Then when the first arc-shaped ring 20 moves to the left, the cylinder 30 resets under the action of the second spring, driving the wedge-shaped block 316 to move to the right. It should be noted that the elasticity of the telescopic spring 317 is greater than that of the third spring 322. Therefore, when the wedge-shaped block 316 moves to the right, it can drive the second frustum 321 to move towards the first frustum 314. When the left side wall of the first frustum 314 abuts against the right side wall of the second frustum 321, the second frustum 321 cannot continue to move to the right. At this time, the wedge-shaped block 316 moves along the side wall of the second frustum 321 to the side wall of the first frustum 314 and then resets along the side wall of the first frustum 314, making the cylinder 30 reset and driving the block 331 to reset. At this time, the arc-shaped piece 231 resets under the action of the third spring 322, and the brushes 232 reset for the next use.

[0045] In summary, by providing a transposition component, when the first arc-shaped ring 20 moves close to the water storage box 13, the cylinder 30 abuts against the side wall of the water storage box 13, causing the position of the arc-shaped piece 231 to shift, thereby changing the position of the brush 232 and filling the gap between adjacent brushes 232, resulting in a better cleaning effect for the coil pipe 12.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A cooling device for formaldehyde solution production, characterized in that: include, The cooling component comprises a closed cooling tower body (10), wherein a plurality of coils (12) are fixedly connected to the closed cooling tower body (10) via a support plate (11), and the right ends of the plurality of coils (12) are connected to a water storage box (13); A cleaning part (23) comprises a first arc-shaped ring (20) arranged outside the coil (12); a second arc-shaped ring (22) is arranged on the first arc-shaped ring (20) via a receiving part (21); the first arc-shaped ring (20) and the second arc-shaped ring (22) are both provided with a cleaning part (23) for cleaning the coil (12); a power part (24) for providing power for the movement of the first arc-shaped ring (20) is provided on the inner wall of the closed cooling tower body (10); a shielding part (25) is provided on the outer side of the power part (24) to prevent water from entering the power part (24); The shifting component comprises a cylinder (30) with two ends open and arranged on the first arc-shaped ring (20); a locking portion (31) and a loosening portion (32) for locking the cylinder (30) are connected to the left end of the cylinder (30); a toggle portion (33) is fixedly connected to the front end of the cylinder (30); and an elastic portion (34) cooperating with the toggle portion (33) is provided on both the first arc-shaped ring (20) and the second arc-shaped ring (22).

2. The cooling device for producing formaldehyde solution according to claim 1, characterized in that: The storage portion (21) comprises a receiving groove (211) arranged in the first arc-shaped ring (20); the second arc-shaped ring (22) extends into the receiving groove (211) and is elastically connected to the inner wall of the receiving groove (211) via a first spring (212).

3. The cooling device for producing formaldehyde solution according to claim 1, characterized in that: The cleaning portion (23) comprises an arc-shaped sheet (231) arranged on the first arc-shaped ring (20) and the second arc-shaped ring (22), and a brush (232) is fixedly connected to the arc-shaped sheet (231).

4. The cooling device for producing formaldehyde solution according to claim 2, characterized in that: The upper end surface of the first arc-shaped ring (20) is flush with the lower end surface of the support plate (11); the second arc-shaped ring (22) can be completely received in the receiving groove (211); a distance is left between the second arc-shaped ring (22) and the inner wall of the receiving groove (211) to accommodate the brush (232); the first arc-shaped ring (20) and the second arc-shaped plate cooperate to form a circular ring having a diameter greater than that of the coil (12).

5. The cooling device for producing formaldehyde solution according to claim 1, characterized in that: The power unit (24) comprises an electric guide rail (241) arranged on the inner wall of the closed cooling tower body (10); the track of the electric guide rail (241) is the same as the track of the coil (12); a slider (242) is slidably connected to the electric guide rail (241); a support rod (243) is rotatably connected to the slider (242); the support rod (243) is fixedly connected to the first arc ring (20) at the front end; and a plurality of the first arc rings (20) are fixedly connected to each other via connecting rods.

6. The cooling device for producing formaldehyde solution according to claim 4 or 5, characterized in that: The shielding portion (25) comprises a bearing plate (251) arranged on the inner wall of the closed cooling tower body (10); a U-shaped plate (252) is fixedly connected to the top of the closed cooling tower body (10); an electric slide rail (253) is arranged on the inner wall of the U-shaped plate (252); a slide bar is slidably connected to the electric slide rail (253); a support (254) is fixedly connected to the slide bar; and a folding water retaining cloth (255) is arranged on the support (254).

7. The cooling device for producing formaldehyde solution according to claim 6, characterized in that: The engaging portion (31) comprises a mounting cavity (311) arranged in the first arc ring (20); the first arc ring (20) is provided with a communication port for the cylinder (30) to enter the mounting cavity (311); a stop ring (312) is fixedly connected to the cylinder (30); the stop ring (312) is elastically connected to the inner wall of the mounting cavity (311) via a second spring; a support column (313) is fixedly connected in the mounting cavity (311); a first truncated cone (314) is fixedly connected to the support column (313); an inner groove (315) is provided on the inner wall of the cylinder (30); a wedge block (316) is slidably connected in the inner groove (315); the wedge block (316) is elastically connected to the inner wall of the inner groove (315) via a telescopic spring (317).

8. The cooling device for producing formaldehyde solution according to claim 7, characterized in that: The release portion (32) comprises a second truncated platform (321) slidably connected to the support column (313), the first truncated platform (314) and the second truncated platform (321) are arranged opposite to each other, and the second truncated platform (321) is elastically connected to the inner wall of the installation cavity (311) via a third spring (322).

9. The cooling device for producing formaldehyde solution according to claim 8, characterized in that: The shifting portion (33) comprises a shifting block (331) fixedly connected to the cylinder (30), and the arc-shaped piece (231) is provided with a notch (332) that matches the shifting block (331).

10. The cooling device for producing formaldehyde solution according to claim 9, characterized in that: The elastic part (34) comprises an arc groove (341) arranged on the first arc ring (20) and the second arc ring (22), an arc block (342) fixed to the arc sheet (231) is slidably connected in the arc groove (341), and the arc block (342) is elastically connected to the inner wall of the arc groove (341) via a fourth spring (343).

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