Axial flow fan auxiliary replacement device

Abstract

The utility model relates to the technical field of wind generating sets, in particular to an auxiliary replacement device for an axial flow fan. The auxiliary replacement device for the axial flow fan comprises a frame body; the pulley block comprises a fixed pulley, a movable pulley and a transmission rope, the fixed pulley is rotatably mounted on the frame body, the transmission rope is wound on the movable pulley and the fixed pulley, and the movable pulley is provided with a connecting part; and the driving mechanism is installed on the frame body, the driving mechanism is connected with one end of the transmission rope, the driving mechanism is provided with a locking assembly, and the locking assembly is configured to fix the transmission rope to the current position. The height of the axial flow fan is adjusted through the auxiliary replacement device for the axial flow fan, the axial flow fan does not need to be supported by more workers at the mounting position of the axial flow fan, the axial flow fan is convenient to mount and dismount, and the replacement time of the axial flow fan is shortened.

Description

Technical Field

[0001] The present application relates to the technical field of wind turbine generator sets, and in particular to an auxiliary replacement device for an axial flow fan. Background Art

[0002] The axial flow fan at the bottom of the wind turbine converter tower is an important heat dissipation device for the converter. During the operation of the unit, the axial flow fan starts frequently as the converter power increases and the temperature rises. In addition, due to long-term continuous operation and environmental influences such as high temperature and wind and sand, the failure rate of the axial flow fan is relatively high. When the axial flow fan fails, the converter heat dissipation is not smooth, and the converter will shut down due to excessive temperature. When the axial flow fan is damaged, it needs to be replaced immediately.

[0003] At present, in the process of replacing an axial flow fan, since the installation position of the axial flow fan is at the bottom of the fan tower base platform, it is necessary to manually lift the axial flow fan to replace the axial flow fan. However, the installation position of the axial flow fan has a small space and the weight of the axial flow fan is large, so it is inconvenient to disassemble and install the axial flow fan, and the replacement time of the axial flow fan is long. Utility Model Content

[0004] Based on this, the present application provides an auxiliary replacement device for an axial flow fan to solve the problems in the related art of inconvenient disassembly and installation of the axial flow fan and long replacement time of the axial flow fan.

[0005] The axial flow fan auxiliary replacement device provided in this application includes:

[0006] Frame;

[0007] The pulley block comprises a fixed pulley, a movable pulley and a transmission rope, wherein the fixed pulley is rotatably mounted on the frame, the transmission rope is wound around the movable pulley and the fixed pulley, and a connecting portion is arranged on the movable pulley;

[0008] The driving mechanism is installed on the frame, connected to one end of the transmission rope, and provided with a locking assembly, which is configured to fix the transmission rope at a current position.

[0009] In one possible implementation, the driving mechanism includes a housing, a transmission assembly, a winding reel, a handle and a locking assembly. The transmission assembly and the winding reel are arranged inside the housing, the handle is rotatably mounted on the housing, the transmission assembly is connected between the handle and the winding reel, one end of the transmission rope is wound around the winding reel, and the locking assembly is connected to the handle.

[0010] In one possible implementation, the transmission assembly includes a first gear and a second gear, the second gear is fixedly connected to the handle, the first gear is coaxially arranged with the winding reel, and the first gear and the winding reel rotate synchronously, the first gear is meshed with the second gear, and the diameter of the first gear is smaller than the diameter of the second gear.

[0011] In a possible implementation, the locking assembly includes a brake disc and a latch, the brake disc is provided with a plurality of first through holes, the housing is provided with a second through hole, and the latch passes through the second through hole and one of the plurality of first through holes.

[0012] In one possible implementation, the frame includes a first support portion, a second support portion, a first support member and a second support member, the first end of the first support portion is rotatably connected to the first end of the second support portion, the first support member is detachably connected to the first support portion and the second support portion, respectively, the second support member is detachably connected to the first support portion and the second support portion, respectively, the fixed pulley is rotatably mounted on the first support member, and the driving mechanism is mounted on the second support member.

[0013] In a possible implementation, the frame further includes four supporting legs, the second end of the first supporting portion and the second end of the second supporting portion are respectively provided with two bearing rods, and the four supporting legs are sleeved on the four bearing rods in a one-to-one correspondence.

[0014] In a possible implementation, the frame further includes a fastener, which passes through the supporting legs and is locked on the bearing rod.

[0015] In a possible implementation, a thread is provided on the side wall of the bearing rod, an internal thread is provided on the inner wall of the supporting leg, and the supporting leg is sleeved on the bearing rod and threadably connected to the bearing rod.

[0016] In a possible implementation, an anti-slip pad is installed at the end of each supporting leg.

[0017] In a possible implementation, the connecting portion is a hook disposed on the movable pulley.

[0018] The auxiliary replacement device for an axial flow fan provided in the present application has a frame that can be arranged on a fan tower base platform, and a hole for the pulley block to pass through is provided on the fan tower base platform. The pulley block adopts a combination of a movable pulley and a fixed pulley to save effort, and the axial flow fan can be connected to the connecting portion of the movable pulley. The driving mechanism can drive the pulley block to move and then drive the axial flow fan to rise or fall. When the axial flow fan rises or falls to a preset position, the transmission rope of the pulley block can be fixed at the current position by the locking assembly of the driving mechanism, thereby fixing the height of the axial flow fan. In this way, the height of the axial flow fan can be adjusted by the auxiliary replacement device for the axial flow fan, and a large number of staff are not required to hold up the axial flow fan at the installation position of the axial flow fan, which facilitates the installation and disassembly of the axial flow fan and shortens the replacement time of the axial flow fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A front view of an axial flow fan auxiliary replacement device provided in an embodiment of the present application;

[0021] Figure 2 A side view of an axial flow fan auxiliary replacement device provided in an embodiment of the present application;

[0022] Figure 3 A top view of an axial flow fan auxiliary replacement device provided in an embodiment of the present application;

[0023] Figure 4 A top view of the driving mechanism provided in an embodiment of the present application.

[0024] Description of reference numerals:

[0025] 100-frame; 110-first support portion; 120-second support portion; 130-first support member; 140-second support member; 150-hinge; 160-support leg; 170-bearing rod;

[0026] 210-fixed pulley; 220-movable pulley; 221-hook; 230-transmission rope;

[0027] 300 - driving mechanism; 310 - housing; 321 - first gear; 322 - second gear; 330 - winding drum; 340 - handle; 350 - brake disc. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiment of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] The terms "first", "second" and "third" (if any) in the specification and claims of this application and the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0032] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display comprising a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0033] In the prior art, the installation position of the axial flow fan is at the bottom of the fan tower base platform. When replacing the axial flow fan, it is necessary to manually lift the axial flow fan to replace the axial flow fan. However, the installation position of the axial flow fan has a small space and the weight of the axial flow fan is large. During the replacement of the axial flow fan, multiple workers are required to lift the axial flow fan, which is inconvenient to operate in a small space, and the disassembly and installation of the axial flow fan is inconvenient, and the replacement time of the axial flow fan is long.

[0034] After repeated thinking and verification, the inventor found that if an axial flow fan auxiliary replacement device is used to hoist the axial flow fan during the replacement process, the axial flow fan auxiliary replacement device can be set on the fan tower base platform, and the axial flow fan auxiliary replacement device can adjust the height of the axial flow fan by driving the pulley block through the driving mechanism, and the driving mechanism is provided with a locking assembly, and the height of the axial flow fan can be fixed by the locking assembly. In this way, multiple workers are not required to hold up the axial flow fan in a small space, which facilitates the disassembly and installation of the axial flow fan and shortens the replacement time of the axial flow fan.

[0035] In view of this, the inventor has designed an auxiliary replacement device for an axial flow fan, which includes a frame, a pulley block and a driving mechanism. The pulley block and the driving mechanism are respectively mounted on the frame. The pulley block can be connected to the axial flow fan, and the pulley block can be driven to move by the driving mechanism. A locking assembly for fixing the pulley block is provided on the driving mechanism. When replacing an axial flow fan, multiple workers are not required to hold up the axial flow fan in a narrow space, which facilitates the disassembly and installation of the axial flow fan and shortens the replacement time of the axial flow fan.

[0036] The technical solution of the axial flow fan auxiliary replacement device provided in the embodiment of the present application is described in detail below in conjunction with the accompanying drawings.

[0037] Reference Figures 1 to 4 As shown, the axial flow fan auxiliary replacement device provided in the embodiment of the present application includes a frame 100, a pulley block and a driving mechanism 300. The pulley block includes a fixed pulley 210, a movable pulley 220 and a transmission rope 230. The fixed pulley 210 is rotatably mounted on the frame 100, the transmission rope 230 is wound around the movable pulley 220 and the fixed pulley 210, and a connecting portion is provided on the movable pulley 220. The driving mechanism 300 is mounted on the frame 100, the driving mechanism 300 is connected to one end of the transmission rope 230, and the driving mechanism 300 is provided with a locking assembly, which is configured to fix the transmission rope 230 at a current position.

[0038] The frame 100 can be placed on a wind turbine tower base platform. In a possible implementation, a mounting portion is provided at the bottom of the fixed pulley 210, one end of the transmission rope 230 is connected to the driving mechanism 300, and the other end of the transmission rope 230 is connected to the mounting portion at the bottom of the fixed pulley 210 after passing through the fixed pulley 210 and the movable pulley 220.

[0039] The axial flow fan can be connected to the connecting portion on the movable pulley 220. It can be understood that when the driving mechanism 300 drives the transmission rope 230 to move, it can drive the movable pulley 220 to rise or fall, and when the movable pulley 220 rises and falls, it can drive the axial flow fan to rise and fall synchronously.

[0040] Exemplarily, the driving mechanism 300 can be installed on the frame 100 by bolts. When the driving mechanism 300 drives the axial flow fan to rise and fall to a preset position through the pulley group, the transmission rope 230 can be fixed at the current position through the locking assembly, that is, the transmission rope 230 is fixed, and then the height of the axial flow fan is fixed.

[0041] The auxiliary replacement device for axial flow fans provided in this embodiment has a frame 100 which can be arranged on a fan tower base platform, and a hole for the pulley block to pass through is provided on the fan tower base platform. The pulley block adopts a combination of a movable pulley 220 and a fixed pulley 210 to save effort, and the axial flow fan can be connected to the connecting portion of the movable pulley 220. The driving mechanism 300 can drive the pulley 220 group to move and then drive the axial flow fan to rise or fall. When the axial flow fan rises or falls to a preset position, the staff can fix the transmission rope 230 of the pulley block at the current position through the locking assembly of the driving mechanism 300, thereby fixing the height of the axial flow fan. In this way, the height of the axial flow fan can be adjusted by the auxiliary replacement device for axial flow fans, and a large number of staff are not required to hold up the axial flow fan at the installation position of the axial flow fan, which is convenient for the installation and disassembly of the axial flow fan and shortens the replacement time of the axial flow fan.

[0042] In one embodiment, Figure 1 , Figure 2 and Figure 4 As shown, the driving mechanism 300 includes a housing 310, a transmission assembly, a winding drum 330, a handle 340 and a locking assembly. The transmission assembly and the winding drum 330 are arranged inside the housing 310, the handle 340 is rotatably mounted on the housing 310, the transmission assembly is connected between the handle 340 and the winding drum 330, one end of the transmission rope 230 is wound on the winding drum 330, and the locking assembly is connected to the handle 340.

[0043] Schematically, a housing cavity is provided inside the housing 310, and a transmission assembly and a winding drum 330 are provided inside the housing cavity. In a possible implementation, the handle 340 is rotatably connected to two opposite walls of the housing 310, respectively. The winding drum 330 is rotatably mounted inside the housing 310, and one end of the transmission rope 230 extends into the housing 310 and is wound around the winding drum 330. When the staff rotates the handle 340, the handle 340 can drive the winding drum 330 to rotate relative to the housing 310 through the transmission assembly, and the winding drum 330 can drive the movable pulley 220 to rise and fall during rotation, thereby driving the axial flow fan to rise and fall synchronously.

[0044] It is worth mentioning that when the axial flow fan is raised or lowered to a preset height, the handle 340 can be fixed by a locking assembly, and the wire winding drum 330 will not rotate relative to the housing 310, so as to achieve a fixed height of the axial flow fan.

[0045] Through the above arrangement, the staff can manually rotate the handle 340, and when the handle 340 is rotated, the winding drum 330 can be driven to rotate through the transmission component to raise and lower the axial flow fan.

[0046] In other embodiments, the driving assembly may include a housing 310, a transmission assembly, a winding drum 330 and a driving motor. When the driving motor rotates, it can drive the winding drum 330 to rotate through the transmission assembly, thereby raising and lowering the axial flow fan.

[0047] In a specific embodiment, Figure 1 , Figure 2 and Figure 4 As shown, the transmission assembly includes a first gear 321 and a second gear 322. The second gear 322 is fixedly connected to the handle 340, the first gear 321 is coaxially arranged with the winding disk 330, and the first gear 321 rotates synchronously with the winding disk 330. The first gear 321 is meshed with the second gear 322, and the diameter of the first gear 321 is smaller than the diameter of the second gear 322.

[0048] For example, Figure 4 As shown, the handle 340 can be set through the second gear 322, and the handle 340 and the second gear 322 can be fixed by welding. When the handle 340 is rotated, it can drive the second gear 322 to rotate synchronously. The transmission assembly can also include a rotating shaft, which is respectively set through the first gear 321 and the winding disk 330, and the rotating shaft is respectively fixedly connected to the first gear 321 and the winding disk 330, and the rotating shaft can rotate relative to the housing 310. It can be understood that since the diameter of the first gear 321 is smaller than the diameter of the second gear 322, when the staff turns the handle 340 to control the rotation of the winding disk 330, the transmission assembly can play a role in speeding up, which is conducive to improving the lifting and lowering rate of the axial flow fan. This embodiment does not limit the specific diameters of the first gear 321 and the second gear 322, and those skilled in the art can set it according to actual needs.

[0049] Through the above arrangement, the handle 340 can reliably drive the winding drum 330 to rotate when rotating. In addition, the transmission component can also play a role in speed increase, which is convenient for improving the lifting and lowering speed of the axial flow fan.

[0050] In other embodiments, a synchronous belt mechanism may also be used as a transmission component, and the handle 340 may drive the winding drum 330 to rotate through the synchronous belt mechanism.

[0051] In a specific embodiment, Figure 1 , Figure 2 and Figure 4 As shown, the locking assembly includes a brake disc 350 and a latch. The brake disc 350 is provided with a plurality of first through holes, the housing 310 is provided with a second through hole, and the latch passes through the second through hole and one of the plurality of first through holes.

[0052] Exemplarily, the brake disc 350 is located outside the housing 310, the handle 340 passes through the brake disc 350 and is fixedly connected to the brake disc 350, and the shape of the brake disc 350 can be circular. Schematically, a plurality of first through holes are arranged in an annular array on the brake disc 350, wherein the number of the first through holes is non-limiting and can be set by those skilled in the art as needed.

[0053] When the staff turns the handle 340, one of the first through holes on the brake disc 350 is coaxial with the second through hole. Before turning the handle 340, the latch is pulled out from the first through hole and the second through hole, and after the axial flow fan is adjusted to a preset height, the latch can be used to pass through one of the first through hole and the second through hole. Optionally, the cross-sectional shapes of the latch, each of the first through hole and the second through hole are all circular, and the cross-sectional dimensions of the latch match the cross-sectional dimensions of each of the first through holes and the cross-sectional dimensions of the second through hole, respectively.

[0054] In this structure, after the pin passes through one of the first through hole and the second through hole, it can limit the rotation of the brake disc 350 relative to the housing 310, and further limit the rotation of the winding disc 330, thereby achieving the fixation of the height of the axial flow fan.

[0055] In other embodiments, the brake disc 350 may also be coaxially arranged with the first gear 321 and the winding disc 330, and a rotating shaft may be used to pass through the brake disc 350, the first gear 321 and the winding disc 330 respectively, and the brake disc 350, the first gear 321 and the winding disc 330 are respectively fixedly connected to the rotating shaft, and the rotating shaft is rotatably connected to the housing 310. When the latch passes through one of the first through hole and the second through hole, the brake disc 350 can be restricted from rotating relative to the housing 310, thereby restricting the rotation of the winding disc 330.

[0056] In one embodiment, Figure 1-Figure 3 As shown, the frame 100 includes a first support portion 110, a second support portion 120, a first support member 130, and a second support member 140. The first end of the first support portion 110 is rotatably connected to the first end of the second support portion 120, the first support member 130 is detachably connected to the first support portion 110 and the second support portion 120, and the second support member 140 is detachably connected to the first support portion 110 and the second support portion 120. The fixed pulley 210 is rotatably mounted on the first support member 130, and the driving mechanism 300 is mounted on the second support member 140.

[0057] For example, the structure of the first support portion 110 may be the same as the structure of the second support portion 120. Figure 1 and Figure 3As shown, the top of the first support part 110 can be connected to the top of the second support part 120 through a hinge 150. The first support member 130 and the second support member 140 can both be an "I"-shaped structure formed by welding a plurality of channel steels. The first support member 130 is located above the second support member 140 and the width of the first support member 130 is smaller than the width of the second support member 140. Optionally, the first support part 110 and the second support part 120 are both provided with a first support beam and a second support beam. The first support member 130 can be detachably connected to the first support beam of the first support part 110 and the first support beam of the second support part 120 by bolts, respectively, and the second support member 140 can also be detachably connected to the second support beam of the first support part 110 and the second support beam of the second support part 120 by bolts, respectively. The first support member 130 and the second support member 140 are respectively made of channel steel, which is convenient for passing bolts through the first support member 130 and the second support member 140, thereby facilitating the installation of the first support member 130 and the second support member 140.

[0058] Through the above-mentioned arrangement, the frame 100 can be folded as needed to reduce the space occupied by the frame 100, thereby facilitating the transportation of the axial fan auxiliary replacement device. By arranging the first support member 130 and the second support member 140, it is convenient to respectively install the fixed pulley 210 and the driving mechanism 300 on the frame 100.

[0059] like Figure 1-Figure 3 As shown, the frame 100 further includes four supporting legs 160. Two bearing rods 170 are respectively disposed at the second end of the first supporting portion 110 and the second end of the second supporting portion 120, and the four supporting legs 160 are sleeved on the four bearing rods 170 in a one-to-one correspondence.

[0060] Specifically, two bearing rods 170 are respectively disposed at the bottom end of the first support portion 110 and the bottom end of the second support portion 120. The two bearing rods 170 of the first support portion 110 are disposed in parallel and spaced apart, and the two bearing rods 170 of the second support portion 120 are disposed in parallel and spaced apart. Among them, each support leg 160 is a cylindrical structure, and the shape of the support leg 160 matches the shape of the bearing rod 170. It is worth mentioning that the bottom end of each support leg 160 can contact the wind turbine tower base platform, and the height of the frame 100 can be adjusted by adjusting the position of the support leg 160 on the bearing rod 170.

[0061] Through the above arrangement, the staff can adjust the height of the frame 100 by adjusting the position of the support leg 160 on the load-bearing rod 170, and then adjust the height of the axial flow fan auxiliary replacement device, which is convenient for flexible arrangement of the axial flow fan auxiliary replacement device and is beneficial to improving the versatility of the axial flow fan auxiliary replacement device.

[0062] In a possible implementation, the frame 100 further includes a fastener, which passes through the support leg 160 and is locked on the bearing rod 170 .

[0063] Bolts may be used as fasteners, a first fastening hole may be provided on the support leg 160, and a plurality of second fastening holes may be provided at intervals on the bearing rod 170. Optionally, the support leg 160 and the bearing rod 170 may both be in a square shape, and the support leg 160 will not rotate relative to the bearing rod 170 after being sleeved on the bearing rod 170, and when the support leg 160 slides relative to the bearing rod 170, the first fastening hole on the support leg 160 can be aligned with the second fastening hole on the bearing rod 170. After the support leg 160 slides relative to the bearing rod 170 to a preset position, the fastener may pass through the first fastening hole and be locked with one of the second fastening holes.

[0064] Through the above arrangement, after the support leg 160 slides to a preset position relative to the load-bearing rod 170, the support leg 160 and the load-bearing rod 170 can be locked by fasteners to ensure that the height of the frame 100 does not change during the use of the axial flow fan auxiliary replacement device.

[0065] In another possible implementation, threads are provided on the side walls of the bearing rod 170 , internal threads are provided on the inner walls of the supporting legs 160 , and the supporting legs 160 are sleeved on the bearing rod 170 and threadedly connected to the bearing rod 170 .

[0066] The support leg 160 and the bearing rod 170 are both circular in shape, and the support leg 160 can rotate relative to the bearing rod 170 after being sleeved on the bearing rod 170. When the support leg 160 rotates relative to the bearing rod 170, under the action of the thread, the support leg 160 moves relative to the bearing rod 170 along the length direction of the bearing rod 170. After the support leg 160 moves to a preset position relative to the bearing rod 170, the support leg 160 will not move relative to the bearing rod 170 due to the self-locking action of the thread between the support leg 160 and the bearing rod 170.

[0067] Through the above arrangement, the position of the supporting leg 160 on the supporting rod 170 can be adjusted by rotating the supporting leg 160 , thereby adjusting the height of the frame 100 .

[0068] Optionally, an anti-slip pad is installed at the end of each supporting leg 160.

[0069] Specifically, the anti-skid pad can be installed at the bottom of the support leg 160, and the anti-skid pad can be made of rubber material. When the axial flow fan auxiliary replacement device is in use, the anti-skid pad at the bottom of the support leg 160 can contact the fan tower base platform. The anti-skid pad can be fixed to the end of the support leg 160 by bonding or snapping, etc., which is not limited here.

[0070] By providing anti-skid pads on the support legs 160, the frame 100 is not prone to slipping on the fan tower base platform during use of the axial flow fan auxiliary replacement device, ensuring that the axial flow fan auxiliary replacement device can reliably assist in replacing the axial flow fan.

[0071] like Figure 1 As shown, the connecting portion is a hook 221 arranged on the movable pulley 220 .

[0072] Exemplarily, the movable pulley 220 includes a bracket and a wheel body rotatably mounted on the bracket, the transmission rope 230 is wound around the wheel body, and the hook 221 can be installed on the bracket of the movable pulley 220. During the process of replacing the axial flow fan, the axial flow fan can be hung on the hook 221 of the movable pulley 220.

[0073] The above arrangement facilitates the connection between the axial flow fan and the movable pulley 220, which is beneficial to improving the replacement efficiency of the axial flow fan.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An auxiliary replacement device for an axial flow fan, characterized in that: include: Frame; A pulley block, comprising a fixed pulley, a movable pulley and a transmission rope, wherein the fixed pulley is rotatably mounted on the frame, the transmission rope is wound around the movable pulley and the fixed pulley, and a connecting portion is provided on the movable pulley; A driving mechanism is installed on the frame, the driving mechanism is connected to one end of the transmission rope, and the driving mechanism is provided with a locking assembly, and the locking assembly is configured to fix the transmission rope at a current position.

2. The axial flow fan auxiliary replacement device according to claim 1, characterized in that: The driving mechanism includes a shell, a transmission assembly, a winding drum, a handle and the locking assembly. The transmission assembly and the winding drum are arranged inside the shell. The handle is rotatably mounted on the shell. The transmission assembly is connected between the handle and the winding drum. One end of the transmission rope is wound around the winding drum. The locking assembly is connected to the handle.

3. The axial flow fan auxiliary replacement device according to claim 2, characterized in that: The transmission assembly includes a first gear and a second gear, the second gear is fixedly connected to the handle, the first gear is coaxially arranged with the winding drum, and the first gear and the winding drum rotate synchronously, the first gear is meshed with the second gear, and the diameter of the first gear is smaller than the diameter of the second gear.

4. The axial flow fan auxiliary replacement device according to claim 2, characterized in that: The locking assembly includes a brake disc and a latch, the brake disc is provided with a plurality of first through holes, the shell is provided with a second through hole, and the latch passes through the second through hole and one of the plurality of first through holes.

5. The axial flow fan auxiliary replacement device according to claim 1, characterized in that: The frame includes a first support portion, a second support portion, a first support member and a second support member, the first end of the first support portion is rotatably connected to the first end of the second support portion, the first support member is detachably connected to the first support portion and the second support portion respectively, the second support member is detachably connected to the first support portion and the second support portion respectively, the fixed pulley is rotatably mounted on the first support member, and the driving mechanism is mounted on the second support member.

6. The axial flow fan auxiliary replacement device according to claim 5, characterized in that: The frame body also includes four supporting legs. The second end of the first supporting part and the second end of the second supporting part are respectively provided with two bearing rods. The four supporting legs are sleeved on the four bearing rods in a one-to-one correspondence.

7. The axial flow fan auxiliary replacement device according to claim 6, characterized in that: The frame also includes a fastener, which passes through the supporting legs and is locked on the bearing rod.

8. The axial flow fan auxiliary replacement device according to claim 6, characterized in that: The side wall of the bearing rod is provided with a thread, the inner wall of the supporting leg is provided with an internal thread, and the supporting leg is sleeved on the bearing rod and threadably connected with the bearing rod.

9. The axial flow fan auxiliary replacement device according to claim 6, characterized in that: The end of each supporting leg is provided with an anti-skid pad.

10. The axial flow fan auxiliary replacement device according to any one of claims 1 to 9, characterized in that: The connecting part is a hook arranged on the movable pulley.

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