Granulation tower fan maintenance system with fan lifting device

Abstract

The invention provides a prilling tower fan maintenance system with a fan lifting device, and belongs to the technical field of urea prilling maintenance, the prilling tower fan maintenance system comprises the fan lifting device and a maintenance track, the maintenance track comprises an annular track and a track support, the fan lifting device comprises a monorail walking trolley and a chain block, and the monorail walking trolley is connected with the track support. The annular track is erected right above the fan; a movable monorail walking trolley and a chain block are mounted on the annular track; the fan is lifted through the chain block for maintenance preparation work, the monorail walking trolley is moved to the end of the annular rail, the chain block is used for placing the fan on the prilling tower platform, and then the fan is transported to the ground through the elevator for maintenance. The problem that when the draught fan is worn or damaged, the draught fan cannot be rapidly detached for overhaul and replacement is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of urea granulation maintenance, and in particular relates to a granulation tower fan maintenance system with a fan lifting device. Background Art

[0002] A urea granulation tower is a device used to produce granular urea. It is typically constructed of reinforced concrete and is an upright, hollow cylindrical structure. Designed to resemble a chimney, the tower's top and bottom sections are straight and have the same diameter. The tower is a reinforced concrete cylinder over 50 meters tall and is used by urea manufacturers to produce fertilizer granules.

[0003] Existing urea granulation towers typically utilize natural ventilation. However, due to factors such as chemical reactions, nozzle spraying, and abnormal operating conditions, the exhaust from the tower top contains a significant amount of dust, primarily urea dust. Furthermore, free ammonia is present in molten urea. After granulation, most of this free ammonia and dust are released into the atmosphere with the exhaust, causing environmental pollution. According to material balance calculations, the theoretical dust generation from urea is 1.2 kg / t. For an annual production of 520,000 tons of urea, this translates to a dust loss of 624 tons. Both measured and theoretical material balance data indicate significant urea dust losses from the granulation tower.

[0004] At present, there are two main dust removal methods for urea granulation towers: dry method and wet method. The dust removal effect of wet water spraying is average, and the main problems are as follows: (1) The filter is easily clogged. In the urea dust recovery system, natural ventilation is mostly used, and there is no filtering equipment at the air inlet. Impurities in the air can easily enter the urea device and deposit at the bottom of the collection tank, which can easily clog the liquid filter under the liquid collection tank. Small impurities enter the circulation tank, causing the filter to be clogged (clean the inlet filter once every five days and the inlet filter once every ten days). (2) The packing layer is clogged and corroded. The fixing rods of the packing layer are easy to soften and deform. In this case, the packing tilts and blocks the exhaust channel, causing equipment failure (the corresponding equipment, stainless steel, etc. need to be replaced in time). When there is too much packing, the temperature of the particles leaving the tower will rise and agglomerate, affecting production. (3) The urea content is low. Low urea content will increase the load of the evaporation system, which will in turn lead to increased consumption. The liquid level of the ammonia tank, the evaporation vacuum and other aspects will be affected. The reasons for the low urea content in the circulating liquid include blockage of the water curtain nozzle, low circulating liquid temperature, and rapid discharge of the circulating liquid. There is a two-way influence between them (to ensure the cleanliness of the urea dust recovery system equipment, the nozzle, pump filter and other components must be cleaned). (4) Insufficient refill volume in the refill tank. In the urea dust recovery system, if the water consumption of the washing liquid is large and the refill pipeline of the refill tank is thin, the refill volume of the refill tank cannot meet the production needs. (5) Tail gas discharge contains liquid and causes tailing. Since a large amount of washing water needs to be sprayed during the wet washing process to remove urea dust and a small amount of ammonia in the flue gas, the flue gas at the discharge port is mixed with a large amount of atomized water vapor, resulting in serious tailing.

[0005] Compared to wet dust removal in urea prilling towers, dry dust removal offers many technical advantages. However, factors such as ventilation volume and air pressure remain difficult to overcome, hindering widespread adoption. In 2017, Shanghai Jingye Environmental Protection Company overcame these technical difficulties, and since then, dry purification has become the mainstream technology for purifying exhaust gases from prilling towers.

[0006] Urea granulation tower exhaust gas high-efficiency dry-process purification systems are typically installed at the tower's top outlet. Twelve to 36 axial flow fans are installed on the top of the cleanroom, distributed around a circle with a diameter of 14 to 25 meters. However, urea granulation towers typically lack fan maintenance equipment, making it difficult to quickly transport fans to the tower platform when maintenance is required. Summary of the Invention

[0007] Based on the technical problems existing in the prior art, the present invention proposes a granulation tower fan maintenance system with a fan lifting device, which solves the problem of difficulty in quickly repairing the fan in the prior art.

[0008] According to the technical solution of the present invention, a prilling tower fan maintenance system with a fan hoisting device is provided. The system includes a fan hoisting device and a maintenance track. The maintenance track includes a circular track and a track bracket. The fan hoisting device includes a monorail trolley and a hand chain hoist. The circular track is erected directly above the fan; the mobile monorail trolley and hand chain hoist are mounted on the circular track. The fan is hoisted by the hand chain hoist for maintenance preparation. The monorail trolley is moved to the end of the circular track and the hand chain hoist is used to place the fan on the prilling tower platform. The fan is then transported to the ground level for maintenance by an elevator.

[0009] Preferably, the circular track in the granulation tower fan maintenance system with a fan hoisting device adopts an I-shaped structure. The track bracket adopts a gate-type structure. The monorail trolley is equipped with rollers, which abut and clamp the track and bear the weight of the hoisted fan.

[0010] Furthermore, the hand chain hoist passes through the lifting ring below the monorail trolley and is connected to the lifting point of the fan when the fan needs to be lifted.

[0011] Furthermore, after the fan is lifted, the monorail trolley is dragged to the edge of the platform. By loosening the hand hoist chain, the fan is lowered to the next platform and transported to the ground for maintenance or replacement; the end of the circular track extends beyond the edge of the clean room, allowing the fan to be placed on the granulation tower platform.

[0012] Preferably, the circular track is made of I-beams according to the designed dimensions to form a circular structure, ensuring that the circular track can pass over all fans. The circular track is supported on the clean room by multiple door-shaped brackets to ensure the strength and stability of the track.

[0013] On the other hand, a granulation tower fan maintenance system with a fan lifting device includes a base, a connecting structure and an auxiliary structure. The upper end of the base is fixedly connected to the granulation tower base, and the upper end of the granulation tower base is fixedly connected to the fan cone. Several fans are installed inside the fan cone, and the upper surface of the fan cone is provided with an auxiliary structure; the auxiliary structure includes a fixed block, the fixed block is fixedly connected to the fan cone, the side of the fixed block close to the fan cone is fixedly connected to the connecting block, the inner wall of the connecting block is fixedly connected to a circular rail, and the arc surface of the circular rail is provided with several moving components.

[0014] Furthermore, the moving component includes a shell, which is slidably connected to the circular rail. A slot is provided on the inner wall of the shell. Several shafts are rotatably connected to the inner wall of the slot, and the arc surface of the shaft is fixedly connected to the roller.

[0015] Preferably, the roller is slidably connected to the circular rail, both ends of the circular rail are fixedly connected to a cross bar, a hook block is fixedly installed on the lower surface of the shell, the lower end of the hook block is fixedly connected to an auxiliary block, a connecting belt is installed inside the auxiliary block, the lower end of the connecting belt is fixedly connected to an inner block, the lower end of the inner block is fixedly connected to an auxiliary hook, and the auxiliary hook is connected to the fan. Furthermore, one end of the auxiliary hook is fixedly connected to an anti-slip pad, which is a rubber pad.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are:

[0017] 1. In this invention, a circular track is set up above all fans, and a mobile monorail trolley and hand chain hoist are installed on the track. When any fan needs maintenance, the fan can be lifted by the hand chain hoist, and then the monorail trolley is moved to the end of the track. The hand chain hoist places the fan on the granulation tower platform, and then the fan is transported to the ground for maintenance by elevator. This device is simple, easy to operate, and has good stability.

[0018] 2. In the present invention, by setting an auxiliary structure, when the fan needs to be repaired, the connecting belt is pulled to move, the connecting belt drives the auxiliary hook to move, and then the auxiliary hook drives the fan to move, and then the outer shell is pulled to move, the slide bar can limit the outer shell, the outer shell drives the roller to rotate on the arc surface of the shaft, the roller rotates on the arc surface of the circular rail, and then the outer shell drives the hook block to move, and the hook block drives the inner block to move, so that the fan can be repaired, the anti-slip pad can increase the friction between the auxiliary hook and the fan, and the protective cover can protect the circular rail. By setting the auxiliary structure, the effect of conveniently transporting the fan for maintenance is achieved.

[0019] 3. In the present invention, an extension structure is provided to facilitate maintenance of the fan by pulling the outer shell to move it, then connecting the bent rod with the cross bar, sliding the outer shell onto the bent pipe along the cross bar, then abutting against the threaded ring, and then rotating the threaded ring to move it. The threaded ring drives the shell to move, the outer shell drives the fan to move, and the threaded ring drives the round rod to slide on the inner wall of the connecting rod and the auxiliary rod. After moving to the appropriate position, the fan is repaired. The anti-slip groove can increase the friction between the fixed plate and the ground. By providing the extension structure, the fan can be easily transported to a lower position for maintenance.

[0020] 4. In the present invention, by providing a connection structure, when the crossbar and the curved rod need to be connected, the screw rod and the lead screw are aligned with the threaded tube, and then the screw rod is inserted into the threaded tube, and then the threaded tube is rotated to move, and the threaded tube drives the lead screw and the screw rod to move, and the screw rod and the lead screw rod are moved closer to each other, and are connected after moving to a suitable position. The magnetic sheet and the iron sheet can increase the tightness of the connection between the lead screw and the screw rod, and the anti-slip sleeve can increase the friction between the hand and the threaded tube. By providing the connection structure, the effect of conveniently connecting the crossbar and the curved rod is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention provides a schematic diagram of the three-dimensional structure of a granulation tower fan maintenance system with a fan lifting device;

[0022] Figure 2 The present invention proposes a schematic diagram of the auxiliary structure of a granulation tower fan maintenance system with a fan lifting device;

[0023] Figure 3 The present invention proposes a granulation tower fan maintenance system with a fan lifting device Figure 2 Internal cross-sectional view of

[0024] Figure 4 The present invention proposes a granulation tower fan maintenance system with a fan lifting device Figure 2 Schematic diagram of part of the structure;

[0025] Figure 5 The present invention provides a schematic diagram of the extended structure of a granulation tower fan maintenance system with a fan lifting device;

[0026] Figure 6 The present invention proposes a granulation tower fan maintenance system with a fan lifting device Figure 5 A magnified view of point A;

[0027] Figure 7 The present invention proposes a granulation tower fan maintenance system with a fan lifting device Figure 5 Enlarged view of point B;

[0028] Figure 8 The present invention provides a schematic diagram of the connection structure of a granulation tower fan maintenance system with a fan lifting device;

[0029] Figure 9 This is a schematic diagram of the corresponding relationship between the horizontal cross-section of the fan group after installation and the vertical projection of the granulation tower;

[0030] Figure 10 Schematic diagram of the structure of the gantry crane used for wind turbine lifting device.

[0031] Legend: 1. Base; 2. Granulation tower base; 3. Fan round table; 4. Fan; 5. Auxiliary structure; 501. Fixed block; 502. Connecting block; 503. Circular rail; 504. Moving assembly; 5041. Housing; 5042. Sliding rod; 5043. Limiting groove; 5044. Roller; 5045. Shaft; 5046. Notch; 5047. Protective cover; 505. Auxiliary block; 506. Crossbar; 5 07. Hook block; 508. Auxiliary hook; 509. Anti-slip pad; 510. Inner block; 511. Connecting belt; 6. Extension structure; 61. Bent rod; 62. Connecting rod; 63. Fixed rod; 64. Auxiliary rod; 65. Round rod; 66. Threaded ring; 67. Fixed plate; 68. Anti-slip groove; 7. Connecting structure; 71. Screw; 72. Lead screw; 73. Magnetic sheet; 74. Iron sheet; 75. Threaded pipe; 76. Anti-slip sleeve. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] The present invention provides a granulation tower fan maintenance system with a fan lifting device, such as Figure 9-10 As shown, the system specifically includes a fan lifting device and maintenance track, further comprising a circular track, track brackets, a monorail trolley, and a hand chain hoist. The track is erected directly above the fan, making it easier and more convenient to lift the fan. A mobile monorail trolley and hand chain hoist are installed on the track. When any fan needs maintenance, the hand chain hoist can be used to lift the fan. The monorail trolley is then moved to the end of the track, and the hand chain hoist is used to place the fan on the granulation tower platform. The fan can then be transported to the ground for maintenance by elevator. This granulation tower fan maintenance system with a fan lifting device has a simple structure, is easy to operate, and has good stability.

[0035] like Figure 10As shown, the track in the granulation tower fan maintenance system with a fan hoisting device adopts an I-shaped structure, making it easier to fix and move the monorail trolley on the track. The track bracket adopts a door-type structure with diagonal braces, making the structure more solid and ensuring that there are no obstructions under the track, so there is no obstruction when lifting and moving the fan. The monorail trolley is equipped with rollers, which fit and clamp the track and thus bear the weight of the hoisted fan. The hand chain hoist passes through the lifting ring under the monorail trolley. When the fan needs to be lifted, it is connected to the fan's lifting point to lift the fan. After the fan is lifted, the monorail trolley is dragged to the edge of the platform. By loosening the hand chain hoist chain, the fan can be lowered to the next platform and transported to the ground for repair or replacement.

[0036] In a preferred embodiment, the circular track is fabricated from I-beams to designed dimensions to ensure it passes over all fans. The track is supported on the cleanroom by multiple portal brackets, ensuring its strength and stability. The ends of the track extend beyond the cleanroom edge, allowing fans to be positioned on the prilling tower platform. A monorail trolley is mounted on the track and can be moved to any desired location along the track. More preferably, a hand chain hoist is installed beneath the monorail trolley to lift the fans.

[0037] Furthermore, the present invention provides a granulation tower fan maintenance system with a fan lifting device, the granulation tower fan maintenance system with a fan lifting device includes a base, a connecting structure and an auxiliary structure, the upper end of the base is fixedly connected to the granulation tower base, the upper end of the granulation tower base is fixedly connected to the fan cone, several fans are installed inside the fan cone, and the upper surface of the fan cone is provided with an auxiliary structure.

[0038] The above technical solution achieves the goal of setting up a circular track passing over all the fans. A mobile monorail trolley and hand chain hoist are installed on the track. When any fan needs maintenance, the hand chain hoist can be used to lift the fan, then the monorail trolley is moved to the end of the track, and the hand chain hoist is used to place the fan on the granulation tower platform. The fan can then be transported to the ground for maintenance by elevator. This device is simple, easy to operate, and has good stability.

[0039] Preferably, the auxiliary structure includes a fixed block, which is fixedly connected to the fan circular table, and the fixed block is fixedly connected to a connecting block on a side close to the fan circular table, the inner wall of the connecting block is fixedly connected to a circular rail, and the circular arc surface of the circular rail is provided with a plurality of movable components, and the movable component includes an outer shell, the outer shell is slidably connected to the circular rail, the inner wall of the outer shell is provided with a slot, and the inner wall of the slot is rotatably connected to a plurality of shaft rods, the circular arc surface of the shaft rods is fixedly connected to rollers, and the rollers are slidably connected to the circular rail, and both ends of the circular rail are fixedly connected to a cross bar, and a hook block is fixedly installed on the lower surface of the outer shell, and the lower end of the hook block is fixedly connected to the auxiliary block, and a connecting belt is installed inside the auxiliary block, the lower end of the connecting belt is fixedly connected to the inner block, and the lower end of the inner block is fixedly connected to the auxiliary hook, and the auxiliary hook is connected to the fan.

[0040] By adopting this preferred solution, when the fan needs to be repaired, the connecting belt is pulled to move, the connecting belt drives the auxiliary hook to move, and then the auxiliary hook drives the fan to move, and then the outer shell is pulled to move, and the outer shell drives the roller to rotate on the arc surface of the shaft, and the roller rotates on the arc surface of the circular rail, and then the outer shell drives the hook block to move, and the hook block drives the inner block to move, so that the fan can be repaired.

[0041] Preferably, one end of the auxiliary hook is fixedly connected to an anti-slip pad, and the anti-slip pad is a rubber pad.

[0042] By adopting this preferred solution, the anti-slip pad can increase the friction between the auxiliary hook and the fan, thereby preventing the fan from loosening when it is lifted.

[0043] Preferably, a protective sleeve is fixedly connected to the inner wall of the shell, and the protective sleeve is slidably connected to the circular rail.

[0044] By adopting this preferred solution, the protective sleeve can protect the circular rail, preventing the circular rail from being worn after long-term use, thereby increasing the service life of the circular rail.

[0045] Preferably, the inner wall of the shell is provided with two limiting grooves, the arc surface of the circular rail is fixedly connected to two sliding rods, and the sliding rods are slidably connected to the limiting grooves.

[0046] By adopting this preferred solution, the sliding rod can limit the housing, preventing the housing from deflecting and rotating when sliding on the arc surface of the circular rail, thereby improving the sliding stability of the housing.

[0047] Preferably, an extension structure is provided at the end of the cross bar away from the circular rail, and the extension structure includes a bent rod, and the bent rod is connected to the cross bar by means of a connecting structure, and the end of the bent rod away from the cross bar is fixedly connected to a connecting rod, and the arc surface of the connecting rod is threadedly connected to a threaded ring, and the arc surface of the connecting rod is fixedly connected to a fixed rod, and the inner wall of the fixed rod is slidably connected to an auxiliary rod, and the inner wall of the auxiliary rod is slidably connected to a round rod, the round rod, the auxiliary rod and the connecting rod are slidably connected, and the round rod is rotatably connected to the threaded ring, and the lower end of the fixed rod is fixedly connected to the rear fixed plate.

[0048] By adopting this preferred solution, it is more convenient to repair the fan. The outer shell is pulled to move, and then the bent rod is connected to the cross bar. The outer shell slides along the cross bar to the bent pipe, and then abuts against the threaded ring. Then the threaded ring is rotated to move. The threaded ring drives the shell to move, the outer shell drives the fan to move, and the threaded ring drives the round rod to slide on the inner wall of the connecting rod and the auxiliary rod. After moving to the appropriate position, the fan is repaired.

[0049] Preferably, a plurality of anti-slip grooves are provided on the lower surface of the fixing plate, and the plurality of anti-slip grooves are evenly distributed on the fixing plate.

[0050] By adopting this preferred solution, the anti-slip groove can increase the friction between the fixed plate and the ground, thereby preventing the fixed plate from sliding when providing support.

[0051] Preferably, a connecting structure is provided at one end of the cross rod close to the bent rod, and the connecting structure includes a screw rod, which is fixedly connected to the cross rod, and the arc surface of the screw rod is threadedly connected to a threaded ring, and the inner walls at both ends of the threaded ring are provided with opposite threads, and the inner wall of the threaded ring away from the end of the screw rod is threadedly connected to a screw rod, and the end of the screw rod away from the screw rod is fixedly connected to the bent rod.

[0052] By adopting this preferred solution, when the crossbar and the curved rod need to be connected, the screw rod and the lead screw are aligned with the threaded tube, and then the screw rod is inserted into the threaded tube, and then the threaded tube is rotated to move, and the threaded tube drives the lead screw and the screw rod to move, and the screw rod and the lead screw rod are moved to each other and connected after moving to the appropriate position.

[0053] Preferably, one end of the screw rod close to the lead screw is fixedly connected to a magnetic sheet, and one end of the lead screw rod close to the screw rod is fixedly connected to an iron sheet, and the iron sheet is adsorbed to the magnetic sheet.

[0054] By adopting this preferred solution, after the screw and the lead screw are moved to the appropriate position, the magnetic sheet and the iron sheet are adsorbed, and the magnetic sheet and the iron sheet can increase the tightness of the connection between the lead screw and the screw.

[0055] Preferably, the arc surfaces at both ends of the threaded tube are fixedly connected with anti-slip sleeves, and the size of the anti-slip sleeves is adapted to the size of the cross bar and the bent rod.

[0056] By adopting this preferred solution, the anti-slip sleeve can increase the friction between the hand and the threaded tube, thereby preventing slipping when the threaded tube is rotated.

[0057] The present invention will be described in detail below with reference to the accompanying drawings. Figures 1-10 As shown, the present invention provides a granulation tower fan maintenance system with a fan lifting device, including a base 1, a connecting structure 7 and an auxiliary structure 5, the upper end of the base 1 is fixedly connected to the granulation tower base 2, the upper end of the granulation tower base 2 is fixedly connected to the fan round table 3, a plurality of fans 4 are installed inside the fan round table 3, the upper surface of the fan round table 3 is provided with an auxiliary structure 5, the end of the cross bar 506 away from the circular rail 503 is provided with an extension structure 6, and the end of the cross bar 506 close to the bent rod 61 is provided with a connecting structure 7.

[0058] The following describes in detail the specific configuration and functions of the auxiliary structure 5, the extension structure 6, and the connection structure 7.

[0059] like Figure 1 and Figure 2As shown, the auxiliary structure 5 includes a fixed block 501, which is fixedly connected to the fan cone 3. The fixed block 501 is fixedly connected to a connecting block 502 on one side close to the fan cone 3. The inner wall of the connecting block 502 is fixedly connected to a circular rail 503. The arc surface of the circular rail 503 is provided with a number of moving components 504. The moving component 504 includes a shell 5041. The shell 5041 is slidably connected to the circular rail 503. The inner wall of the shell 5041 is provided with a notch 5046. The inner wall of the notch 5046 is rotatably connected to a number of shafts 5045. The arc surface of the shaft 5045 is fixedly connected to a roller 5044. The roller 5044 is connected to the circular rail 503 is a sliding connection, both ends of the circular rail 503 are fixedly connected with a cross bar 506, a hook block 507 is fixedly installed on the lower surface of the shell 5041, the lower end of the hook block 507 is fixedly connected with the auxiliary block 505, a connecting belt 511 is installed inside the auxiliary block 505, the lower end of the connecting belt 511 is fixedly connected with the inner block 510, the lower end of the inner block 510 is fixedly connected with the auxiliary hook 508, the auxiliary hook 508 is connected to the fan 4, and this preferred solution is adopted, so that when the fan 4 needs to be repaired, the connecting belt 511 is pulled to move, the connecting belt 511 drives the auxiliary hook 508 to move, and then the auxiliary hook 508 drives the fan 4 to move, and then After that, the outer shell 5041 is pulled to move, and the outer shell 5041 drives the roller 5044 to rotate on the arc surface of the shaft 5045, and the roller 5044 rotates on the arc surface of the circular rail 503. Then the outer shell 5041 drives the hook block 507 to move, and the hook block 507 drives the inner block 510 to move, so that the fan 4 can be repaired. One end of the auxiliary hook 508 is fixedly connected with an anti-skid pad 509, and the anti-skid pad 509 is a rubber pad. With this preferred solution, the anti-skid pad 509 can increase the friction between the auxiliary hook 508 and the fan 4 to avoid loosening when the fan 4 is lifted. The inner wall of the outer shell 5041 is fixedly connected with a protective sleeve 5047, and the protective sleeve 5047 is fixedly connected with the inner wall of the outer shell 5041. The sleeve 5047 is slidably connected to the circular rail 503. By adopting this preferred solution, the protective sleeve 5047 can protect the circular rail 503, preventing the circular rail 503 from being worn after long-term use, thereby improving the service life of the circular rail 503. The inner wall of the shell 5041 is provided with two limiting grooves 5043, and the arc surface of the circular rail 503 is fixedly connected with two sliding rods 5042. The sliding rods 5042 are slidably connected to the limiting grooves 5043. By adopting this preferred solution, the sliding rods 5042 can limit the shell 5041, preventing the shell 5041 from deflecting and rotating when sliding on the arc surface of the circular rail 503, thereby improving the sliding stability of the shell 5041.

[0060] The effect achieved by the entire auxiliary structure 5 is that, by setting the auxiliary structure 5, when the fan 4 needs to be repaired, the connecting belt 511 is pulled to move, the connecting belt 511 drives the auxiliary hook 508 to move, and then the auxiliary hook 508 drives the fan 4 to move, and then the shell 5041 is pulled to move, the slide bar 5042 can limit the shell 5041, the shell 5041 drives the roller 5044 to rotate on the arc surface of the shaft 5045, the roller 5044 rotates on the arc surface of the circular rail 503, and then the shell 5041 drives the hook block 507 to move, and the hook block 507 drives the inner block 510 to move, so that the fan 4 can be repaired, the anti-slip pad 509 can increase the friction between the auxiliary hook 508 and the fan 4, and the protective cover 5047 can protect the circular rail 503. By setting the auxiliary structure 5, the effect of conveniently transporting the fan for maintenance is achieved.

[0061] like Figure 1 and Figure 5 As shown, the extension structure 6 includes a bent rod 61, which is connected to the cross rod 506 by means of a connecting structure 7, and the end of the bent rod 61 away from the cross rod 506 is fixedly connected to the connecting rod 62, and the arc surface of the connecting rod 62 is threadedly connected to the threaded ring 66, and the arc surface of the connecting rod 62 is fixedly connected to the fixing rod 63, and the inner wall of the fixing rod 63 is slidably connected to the auxiliary rod 64, and the inner wall of the auxiliary rod 64 is slidably connected to the round rod 65, and the round rod 65 is slidably connected to the auxiliary rod 64 and the connecting rod 62, and the round rod 65 is rotatably connected to the threaded ring 66, and the lower end of the fixing rod 63 is fixedly connected to the rear fixing plate 67. By adopting this preferred solution, it is achieved that in order to make it more convenient to repair the fan 4, the outer casing 5041 can be pulled. Move it, then connect the bent rod 61 with the cross bar 506, the shell 5041 slides onto the bent pipe along the cross bar 506, and then abuts against the threaded ring 66, and then rotates the threaded ring 66 to move, the threaded ring 66 drives the shell to move, the shell 5041 drives the fan 4 to move, and the threaded ring 66 drives the round rod 65 to slide on the inner wall of the connecting rod 62 and the auxiliary rod 64. After moving to the appropriate position, the fan 4 is repaired, and a plurality of anti-skid grooves 68 are provided on the lower surface of the fixed plate 67, and the plurality of said anti-skid grooves 68 are evenly distributed on the fixed plate 67. By adopting this preferred solution, the anti-skid grooves 68 can increase the friction between the fixed plate 67 and the ground, thereby preventing the fixed plate 67 from sliding during support.

[0062] The effect achieved by the entire extension structure 6 is that, by setting the extension structure 6, in order to make it more convenient to repair the fan 4, the outer shell 5041 is pulled to move, and then the bent rod 61 is connected to the cross bar 506, and the outer shell 5041 slides onto the bent pipe along the cross bar 506, and then abuts against the threaded ring 66, and then the threaded ring 66 is rotated to move, and the threaded ring 66 drives the shell to move, and the outer shell 5041 drives the fan 4 to move, and the threaded ring 66 drives the round rod 65 to slide on the inner wall of the connecting rod 62 and the auxiliary rod 64, and the fan 4 is repaired after moving to the appropriate position. The anti-slip groove 68 can increase the friction between the fixed plate 67 and the ground. By setting the extension structure 6, the effect of conveniently transporting the fan to a lower position for maintenance is achieved.

[0063] like Figure 1 and Figure 8 As shown, the connecting structure 7 includes a screw rod 71, and the screw rod 71 is fixedly connected to the cross rod 506. The arc surface of the screw rod 71 is threadedly connected to a threaded ring 66, and the inner walls at both ends of the threaded ring 66 are provided with opposite threads. The inner wall of the threaded ring 66 away from the end of the screw rod 71 is threadedly connected to a screw rod 72, and the end of the screw rod 72 away from the screw rod 71 is fixedly connected to the bent rod 61. By adopting this preferred solution, when it is necessary to connect the cross rod 506 and the bent rod 61, the screw rod 71 and the screw rod 72 are aligned with the threaded tube 75, and then the screw rod 72 is connected. When the handle 75 is in the closed position, the locking nut 77 is locked, and the locking nut 77 is locked, so that the master can lock the locking nut 77 in the closed position.

[0064] The effect achieved by the entire connection structure 7 is that, by setting the connection structure 7, when it is necessary to connect the cross bar 506 and the curved rod 61, the screw rod 71 and the lead screw 72 are aligned with the threaded tube 75, and then the screw rod 72 is inserted into the threaded tube 75, and then the threaded tube 75 is rotated to move, and the threaded tube 75 drives the lead screw 72 and the screw rod 71 to move, and the screw 71 and the lead screw 72 are moved closer to each other and connected after moving to the appropriate position. The magnetic piece 73 and the iron piece 74 can increase the tightness of the connection between the lead screw 72 and the screw 71, and the anti-slip sleeve 76 can increase the friction between the hand and the threaded tube 75. By setting the connection structure 7, the effect of conveniently connecting the cross bar 506 and the curved rod 61 is achieved.

[0065] The overall working principle is to set up a circular track passing above all fans 4, and install a mobile monorail trolley and hand chain hoist on the track. When any fan 4 needs maintenance, the hand chain hoist can lift the fan 4, then move the monorail trolley to the end of the track, and use the hand chain hoist to place the fan 4 on the granulation tower platform. The fan 4 can then be transported to the ground for maintenance by elevator. The device is simple, easy to operate, and has good stability.

[0066] By setting up the auxiliary structure 5, when the fan 4 needs to be repaired, the connecting belt 511 is pulled to move, the connecting belt 511 drives the auxiliary hook 508 to move, and then the auxiliary hook 508 drives the fan 4 to move, and then the shell 5041 is pulled to move, the slide bar 5042 can limit the shell 5041, the shell 5041 drives the roller 5044 to rotate on the arc surface of the shaft 5045, the roller 5044 rotates on the arc surface of the circular rail 503, and then the shell 5041 drives the hook block 507 to move, and the hook block 507 drives the inner block 510 to move, so that the fan 4 can be repaired, the anti-slip pad 509 can increase the friction between the auxiliary hook 508 and the fan 4, and the protective cover 5047 can protect the circular rail 503. By setting up the auxiliary structure 5, the effect of conveniently transporting the fan for maintenance is achieved.

[0067] By setting the extension structure 6, in order to make it more convenient to repair the fan 4, pull the shell 5041 to move, then connect the bent rod 61 with the cross bar 506, the shell 5041 slides onto the bent pipe along the cross bar 506, and then abuts against the threaded ring 66, and then rotates the threaded ring 66 to move, the threaded ring 66 drives the shell to move, the shell 5041 drives the fan 4 to move, the threaded ring 66 drives the round rod 65 to slide on the inner wall of the connecting rod 62 and the auxiliary rod 64, and the fan 4 is repaired after moving to the appropriate position. The anti-slip groove 68 can increase the friction between the fixed plate 67 and the ground. By setting the extension structure 6, the effect of conveniently transporting the fan to a lower position for maintenance is achieved.

[0068] By setting the connection structure 7, when the cross bar 506 and the curved rod 61 need to be connected, the screw rod 71 and the lead screw 72 are aligned with the threaded tube 75, and then the screw rod 72 is inserted into the threaded tube 75, and then the threaded tube 75 is rotated to move. The threaded tube 75 drives the lead screw 72 and the screw rod 71 to move, and the screw 71 and the lead screw 72 are moved closer to each other. After moving to the appropriate position, they are connected. The magnetic piece 73 and the iron piece 74 can increase the tightness of the connection between the lead screw 72 and the screw 71, and the anti-slip sleeve 76 can increase the friction between the hand and the threaded tube 75. By setting the connection structure 7, the effect of conveniently connecting the cross bar 506 and the curved rod 61 is achieved.

[0069] The above description is merely a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any person skilled in the art may utilize the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change, and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A granulation tower fan maintenance system with a fan lifting device, which includes a fan lifting device and a maintenance track. The maintenance track includes a ring track and a track bracket. The fan lifting device includes a monorail trolley and a hand winch. The ring track is set up directly above the fan; the mobile monorail trolley and the hand winch are installed on the ring track.

2. The granulation tower fan maintenance system with a fan lifting device according to claim 1 is characterized in that: The fan is hoisted by a hand hoist for maintenance preparation. The fan is placed on the granulation tower platform by moving the monorail trolley to the end of the circular track and using a hand hoist, and then transported to the ground for maintenance by elevator.

3. The granulation tower fan maintenance system with a fan lifting device according to claim 1 is characterized in that: The annular track in the granulation tower fan maintenance system with the fan lifting device adopts an I-shaped structure.

4. The granulation tower fan maintenance system with a fan lifting device according to claim 1 is characterized in that: The track bracket adopts a gate structure.

5. The granulation tower fan maintenance system with a fan lifting device according to claim 1 is characterized in that: The monorail trolley is equipped with rollers, which fit and clamp the rails and bear the weight of the hoisted fan.

6. The granulation tower fan maintenance system with a fan lifting device according to claim 5 is characterized in that: The hand chain hoist passes through the lifting ring under the monorail trolley and is connected to the lifting point of the fan when the fan needs to be lifted.

7. The granulation tower fan maintenance system with a fan lifting device according to claim 6 is characterized in that: After the fan is lifted, drag the monorail trolley to the edge of the platform, loosen the hand hoist chain, lower the fan to the next level platform and transport it to the ground for maintenance or replacement.

8. The granulation tower fan maintenance system with a fan lifting device according to claim 7 is characterized in that: The end of the circular track exceeds the edge of the clean room, so that the fan can be placed on the granulation tower platform.

9. The granulation tower fan maintenance system with a fan lifting device according to claim 1 is characterized in that: The circular track is made of I-beams according to the designed dimensions to form a circular structure, ensuring that the circular track can pass over all fans. The circular track is supported on the clean room by multiple door-shaped brackets to ensure the strength and stability of the track.

10. The granulation tower fan maintenance system with a fan lifting device according to claim 1, characterized in that: It comprises a base (1), a connecting structure (7) and an auxiliary structure (5), and is characterized in that: the upper end of the base (1) is fixedly connected to a granulation tower base (2), the upper end of the granulation tower base (2) is fixedly connected to a fan truncated platform (3), a plurality of fans (4) are installed inside the fan truncated platform (3), and the upper surface of the fan truncated platform (3) is provided with an auxiliary structure (5); The auxiliary structure (5) comprises a fixed block (501), the fixed block (501) being fixedly connected to the fan cone (3), a connecting block (502) being fixedly connected to a side of the fixed block (501) close to the fan cone (3), a circular rail (503) being fixedly connected to the inner wall of the connecting block (502), and a plurality of movable components (504) being provided on the arc surface of the circular rail (503).

Images