Axial flow fan replacing device

Abstract

The utility model provides an axial flow fan replacing device which comprises a hydraulic lifting mechanism and a transmission mechanism, and the hydraulic lifting mechanism comprises a base and an output end; the transmission mechanism comprises an objective table, a horizontal transmission mechanism and a longitudinal transmission mechanism, and the horizontal transmission mechanism and the longitudinal transmission mechanism share a first transmission gear set; the objective table bears the horizontal transmission mechanism, the longitudinal transmission mechanism drives the horizontal transmission mechanism to move in the horizontal direction by driving the first transmission gear set to work, and the horizontal transmission mechanism is used for arranging an axial flow fan; the objective table is fixedly connected with the output end of the hydraulic lifting mechanism, and when the hydraulic lifting mechanism drives the objective table to move in the vertical direction, the bottom end of the longitudinal transmission mechanism can slide in a sliding groove formed in the base. The axial flow fan replacement device can improve the replacement efficiency of the axial flow fan.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of power infrastructure, and in particular, to an axial flow fan replacement device. Background Art

[0002] During the process of fan power generation, the generator in the wind turbine will be affected by factors such as current and friction during operation, and thus generate heat. In order to ensure that the generator can work efficiently for a long time, it is necessary to keep the working temperature of the generator within a suitable range. The axial flow fan is applied to the wind turbine for heat dissipation due to its high exhaust efficiency. However, due to the long-term operation of the axial flow fan, the axial flow fan is often damaged, which in turn affects the power generation efficiency of the generator set. The traditional method of replacing the axial flow fan is to replace it by manual handling. However, the axial flow fan is usually in a high position, and manual handling replacement is time-consuming and laborious, and is prone to safety accidents. Summary of the Utility Model

[0003] The embodiments of the present application provide an axial flow fan replacement device to solve the technical problem of low efficiency in replacing the axial flow fan.

[0004] The embodiments of the present application provide the following technical solutions to solve the above technical problems:

[0005] The embodiments of the present application provide an axial flow fan replacement device, including a hydraulic lifting mechanism and a transmission mechanism. Among them, the hydraulic lifting mechanism includes a base and an output end;

[0006] The transmission mechanism includes a loading platform, a horizontal transmission mechanism and a longitudinal transmission mechanism. The horizontal transmission mechanism and the longitudinal transmission mechanism share a first transmission gear set;

[0007] The loading platform bears the horizontal transmission mechanism. The longitudinal transmission mechanism drives the first transmission gear set to work, so as to drive the horizontal transmission mechanism to move in the horizontal direction. Among them, the horizontal transmission mechanism is used to install the axial flow fan;

[0008] The loading platform is fixedly connected to the output end of the hydraulic lifting mechanism. When the hydraulic lifting mechanism drives the loading platform to move in the vertical direction, the bottom end of the longitudinal transmission mechanism can slide in the chute provided on the base.

[0009] Advantages of the embodiments of the present application: The axial flow fan replacement device provided by the embodiments of the present application includes a hydraulic lifting mechanism and a transmission mechanism. The transmission mechanism includes a horizontal transmission mechanism and a longitudinal transmission mechanism. The horizontal transmission mechanism is connected to the hydraulic lifting mechanism, and the longitudinal transmission mechanism is connected to the horizontal transmission mechanism. By controlling the displacement of the horizontal transmission mechanism in the vertical direction through the hydraulic lifting mechanism, and controlling the horizontal movement of the horizontal transmission mechanism through the longitudinal transmission mechanism, the ground staff can control the longitudinal transmission mechanism and the hydraulic lifting mechanism to drive the horizontal transmission mechanism to displace in the horizontal and vertical directions, thereby driving the axial flow fan to displace in the horizontal and vertical directions, avoiding manual handling of the axial flow fan, and improving the replacement efficiency of the axial flow fan.

[0010] In a possible implementation manner, the horizontal transmission mechanism includes the first transmission gear set and the drive shaft, and, the driven gear set and the driven shaft;

[0011] The first transmission gear set includes a first transmission gear and a second transmission gear, and the first transmission gear and the second transmission gear are respectively sleeved at both ends of the drive shaft;

[0012] The driven gear set includes a first driven gear and a second driven gear, and the first driven gear and the second driven gear are sleeved at both ends of the driven shaft;

[0013] Wherein, the first transmission gear set drives the driven gear set to move.

[0014] In a possible implementation manner, the longitudinal transmission mechanism includes the first transmission gear set and the drive shaft, and, the second transmission gear set and the transmission shaft;

[0015] The second transmission gear set includes a third transmission gear and a fourth transmission gear, and the third transmission gear and the fourth transmission gear are sleeved at both ends of the transmission shaft;

[0016] Wherein, the second transmission gear set drives the first transmission gear set to move.

[0017] In a possible implementation manner, the tooth widths of the first driven gear and the second driven gear are smaller than the tooth widths of the first transmission gear and the second transmission gear.

[0018] In a possible implementation manner, the end face of the first transmission gear close to the drive shaft and the end face of the first driven gear close to the driven shaft are in the same plane, and the end face of the second transmission gear close to the drive shaft and the end face of the second driven gear close to the driven shaft are in the same plane.

[0019] In a possible implementation, the tooth width of the first transmission gear is at least greater than the sum of the widths of the first driven gear and the transmission chain, and the tooth width of the second transmission gear is at least greater than the sum of the widths of the second driven gear and the transmission chain, where the transmission chain is a chain connecting the first transmission gear set and the second transmission gear set.

[0020] In a possible implementation, the chute is located on one side of the hydraulic lifting mechanism, and the chute is used to carry the second transmission gear set.

[0021] In a possible implementation, the longitudinal transmission mechanism further includes a hand crank, the hand crank is connected to the transmission shaft, and the second transmission gear set drives the first transmission gear set to perform transmission through the hand crank.

[0022] In a possible implementation, the hydraulic lifting mechanism is a scissor-type mechanism.

[0023] In a possible implementation, a pressure building pedal and a pressure relief pedal are further provided on the base, and the pressure building pedal and the pressure relief pedal are respectively connected to the hydraulic lifting mechanism.

[0024] In addition to the technical problems solved by the present application, the technical features constituting the technical solution, and the beneficial effects brought by these technical features of the technical solution described above, other technical problems that the axial flow fan replacement device provided by the present application can solve, other technical features included in the technical solution, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0026] Figure 1 It is a schematic structural diagram of the first working state of the axial flow fan replacement device according to an embodiment of the present application;

[0027] Figure 2 It is a schematic structural diagram of the second working state of the axial flow fan replacement device according to an embodiment of the present application.

[0028] Description of the reference numerals:

[0029] 100, hydraulic lifting mechanism; 101, base; 102, output end;

[0030] 200, transmission mechanism; 210, loading platform;

[0031] 220, drive shaft; 221, first transmission gear; 222, second transmission gear;

[0032] 230, drive shaft; 231, third transmission gear; 232, fourth transmission gear; 233, transmission chain;

[0033] 240, driven shaft; 241, first driven gear; 242, second driven gear;

[0034] 250, chute; 260, hand crank.

[0035] Through the above-mentioned drawings, the specific embodiments of the present application have been shown, and there will be a more detailed description hereinafter. These drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0036] In the related art, in order to ensure that the generator can work efficiently for a long time and keep the working temperature of the generator within a suitable range, it is necessary to replace the axial flow fan for cooling the generator in time. However, since there is a certain height between the axial flow fan and the ground, there are relatively large potential safety hazards in the way of manual disassembly and handling, and the replacement efficiency is relatively low.

[0037] In view of this, in the embodiment of the present application, a horizontal transmission mechanism is arranged at the output end of the hydraulic lifting mechanism, and a longitudinal transmission mechanism is arranged on the base of the hydraulic lifting mechanism, so that the longitudinal transmission mechanism drives the horizontal transmission mechanism to move horizontally, and then drives the axial flow fan on the horizontal transmission mechanism to move horizontally. The vertical movement of the hydraulic lifting mechanism drives the horizontal transmission mechanism to move vertically, and then drives the axial flow fan on the horizontal transmission mechanism to move vertically, improving the handling efficiency.

[0038] Next, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0039] Figure 1 It is a schematic structural diagram of the first working state of the axial flow fan replacement device in the embodiment of the present application; Figure 2 It is a schematic structural diagram of the second working state of the axial flow fan replacement device in the embodiment of the present application.

[0040] Such as Figure 1 And Figure 2As shown in the figure, the axial flow fan replacement device provided by the embodiment of the present application includes a hydraulic lifting mechanism 100 and a transmission mechanism 200. The transmission mechanism 200 includes a horizontal transmission mechanism and a longitudinal transmission mechanism. The horizontal transmission mechanism is connected to the hydraulic lifting mechanism, and the longitudinal transmission mechanism is connected to the horizontal transmission mechanism. The hydraulic lifting mechanism is used to control the displacement of the horizontal transmission mechanism in the vertical direction, and the longitudinal transmission mechanism is used to control the horizontal movement of the horizontal transmission mechanism. By setting the horizontal transmission mechanism on the hydraulic lifting mechanism and the longitudinal transmission mechanism on the horizontal transmission mechanism in the embodiment of the present application, ground personnel can control the longitudinal transmission mechanism and the hydraulic lifting mechanism to drive the horizontal transmission mechanism to displace in the horizontal and vertical directions, and then drive the axial flow fan to displace in the horizontal and vertical directions, avoiding manual handling of the axial flow fan and improving the replacement efficiency of the axial flow fan.

[0041] In a first aspect, referring to Figure 1 As shown in the figure, the embodiment of the present application provides an axial flow fan replacement device for transporting an axial flow fan at a high place to the ground. And Figure 1 This is the first working state of the axial flow fan replacement device in the embodiment of the present application. In the first working state, the hydraulic lifting mechanism 100 in the axial flow fan replacement device is in the rising state. The axial flow fan replacement device in the first working state can be kept at the same height as the axial flow fan, so that the axial flow fan can be placed on the horizontal loading platform 210 of the axial flow fan replacement device.

[0042] Specifically, the axial flow fan replacement device includes a hydraulic lifting mechanism 100 and a transmission mechanism 200. The hydraulic lifting mechanism 100 includes a base 101 and an output end 102. The base 101 includes a pressure building pedal and a pressure relief pedal. The pressure building pedal is used to apply pressure to the hydraulic lifting mechanism 100 and open the valve when pressure is applied, so that the hydraulic cylinder in the hydraulic lifting mechanism 100 obtains hydraulic pressure, and then can push the hydraulic lifting mechanism 100 to rise. When the staff steps on the pressure building pedal, the hydraulic lifting mechanism 100 can be lifted and enter the first working state. The pressure relief pedal is used to release the pressure of the hydraulic lifting mechanism 100 so that the hydraulic lifting mechanism 100 descends. When the staff steps on the pressure relief pedal, the valve of the hydraulic lifting mechanism 100 opens, so that the pressure of the hydraulic cylinder in the hydraulic lifting mechanism 100 is released, and the hydraulic lifting mechanism 100 begins to descend and enters the second working state. Further, the output end 102 can be fixedly connected to the horizontal loading platform 210 in the transmission mechanism 200.

[0043] In the embodiments of the present application, the transmission mechanism 200 includes a stage 210, a horizontal transmission mechanism, and a longitudinal transmission mechanism. The horizontal transmission mechanism and the longitudinal transmission mechanism share a first transmission gear set. The stage 210 bears the horizontal transmission mechanism. The longitudinal transmission mechanism drives the first transmission gear set to work, so as to drive the horizontal transmission mechanism to move in the horizontal direction. Among them, the horizontal transmission mechanism is used to arrange an axial flow fan. That is to say, the longitudinal transmission mechanism can drive the horizontal transmission mechanism to move in the horizontal direction by driving the first transmission gear set to work, so as to drive the axial flow fan on the horizontal transmission mechanism to move in the horizontal direction. The stage 210 is fixedly connected to the output end 102 of the hydraulic lifting mechanism 100. When the hydraulic lifting mechanism 100 drives the stage 210 to move in the vertical direction, the bottom end of the longitudinal transmission mechanism can slide in the chute 250 provided on the base 101. That is to say, when the hydraulic lifting mechanism 100 moves in the vertical direction, the horizontal transmission mechanism carried by the stage 210 can keep the same motion state as the hydraulic lifting mechanism 100. Also, because the horizontal transmission mechanism and the longitudinal transmission mechanism share the first transmission gear set, when the horizontal transmission mechanism displaces in the vertical direction, the bottom end of the longitudinal transmission mechanism can slide in the chute 250. Further, when the horizontal transmission mechanism moves upward following the hydraulic lifting mechanism 100, the bottom end of the longitudinal transmission mechanism can slide to the left in the chute 250; when the horizontal transmission mechanism moves downward following the hydraulic lifting mechanism 100, the bottom end of the longitudinal transmission mechanism can slide to the right in the chute 250.

[0044] In some embodiments of the present application, the output end 102 and the stage 210 can be connected by bolts. Optionally, the output end 102 and the stage 210 can also be connected by a pin shaft. Preferably, the output end 102 and the stage 210 are connected by bolts. This connection method is easy to disassemble and maintain.

[0045] In some embodiments of the present application, the horizontal transmission mechanism includes a first transmission gear set and a drive shaft 220, as well as a driven gear set and a driven shaft 240; the first transmission gear set includes a first transmission gear 221 and a second transmission gear 222, and the first transmission gear 221 and the second transmission gear 222 are respectively sleeved at both ends of the drive shaft 220; the driven gear set includes a first driven gear 241 and a second driven gear 242, and the first driven gear 241 and the second driven gear 242 are sleeved at both ends of the driven shaft 240; wherein, the first transmission gear set drives the driven gear set to move. Optionally, the first transmission gear set and the driven gear set are connected by a chain. That is to say, when the first transmission gear 221 and the second transmission gear 222 in the first transmission gear set rotate, the first transmission gear 221 and the second transmission gear 222 can drive the first driven gear 241 and the second driven gear 242 in the driven gear set to rotate through the chain, and further cause the driven shaft 240 connected to the first driven gear 241 and the second driven gear 242 to rotate. Optionally, the transmission principle of the horizontal transmission mechanism is similar to that of a gear conveyor belt.

[0046] In order to enable the first transmission gear 221 and the second transmission gear 222 sleeved at both ends of the drive shaft 220 and the first driven gear 241 and the second driven gear 242 sleeved at both ends of the driven shaft 240 to maintain stability during transmission, the matching manner between the first transmission gear 221 and the second transmission gear 222 and the drive shaft 220 and the matching manner between the first driven gear 241 and the second driven gear 242 and the driven shaft 240 adopt keyway matching, preferably, double-key matching.

[0047] Optionally, the first transmission gear set and the driven gear set are also provided with a braking mechanism, and the braking mechanism can be a friction brake. The friction brake can be arranged on both sides of the first transmission gear 221 and the first driven gear 241. In the non-working state, the friction brake can clamp the first transmission gear 221 and the first driven gear 241, and further enable the first transmission gear set and the driven gear set to maintain stability.

[0048] In some embodiments of the present application, the longitudinal transmission mechanism includes a first transmission gear set and a drive shaft 220, and a second transmission gear set and a transmission shaft 230; the second transmission gear set includes a third transmission gear 231 and a fourth transmission gear 232, and the third transmission gear 231 and the fourth transmission gear 232 are sleeved at both ends of the transmission shaft 230; wherein, the second transmission gear set drives the first transmission gear set to move. The second transmission gear set can drive the first transmission gear set to move, and since the first transmission gear set can drive the driven gear set to move, that is, the second transmission gear set can drive the driven gear set to move. That is to say, during the process of transporting the axial flow fan, the staff only needs to drive the second transmission gear set located on the base 101 of the hydraulic lifting mechanism 100 to drive the first transmission gear set and the driven gear set in the horizontal transmission mechanism, thereby realizing the horizontal movement of the axial flow fan, avoiding high-altitude operation by the staff, and improving the replacement efficiency of the axial flow fan.

[0049] In order to ensure the stability of the third transmission gear 231 and the fourth transmission gear 232 sleeved at both ends of the transmission shaft 230 during transmission, the cooperation mode between the third transmission gear 231 and the fourth transmission gear 232 and the transmission shaft 230 adopts keyway fit, preferably, double-key fit.

[0050] In some embodiments of the present application, the end face of the first transmission gear 221 close to the drive shaft 220 and the end face of the first driven gear 241 close to the driven shaft 240 are located in the same plane, and the end face of the second transmission gear 222 close to the drive shaft 220 and the end face of the second driven gear 242 close to the driven shaft 240 are located in the same plane. Preferably, the drive shaft 220 and the driven shaft 240 are parallel to each other and perpendicular to the vertical plane. Through the above settings, it is beneficial to ensure the stability and smoothness of the first transmission gear set and the driven gear set during transmission, and can reduce unnecessary displacement and vibration caused by axial load.

[0051] In some embodiments of the present application, the tooth widths of the first driven gear 241 and the second driven gear 242 are smaller than the tooth widths of the first transmission gear 221 and the second transmission gear 222.

[0052] In some embodiments of the present application, the tooth width of the first transmission gear 221 is at least greater than the sum of the widths of the first driven gear 241 and the transmission chain 233, and the tooth width of the second transmission gear 222 is at least greater than the sum of the widths of the second driven gear 242 and the transmission chain 233, wherein the transmission chain 233 is a chain connecting the first transmission gear set and the second transmission gear set. Preferably, the tooth widths of the first transmission gear 221 and the second transmission gear 222 are 115% of the sum of the widths of the first driven gear 241 and the transmission chain 233. By setting a margin for the tooth widths of the first transmission gear 221 and the second transmission gear 222, the reliability and safety of the transmission can be ensured.

[0053] Preferably, there are two drive chains 233. The first drive gear 221 and the third drive gear 231 are connected by a drive chain 233, and the second drive gear 222 and the fourth drive gear 232 are connected by a drive chain 233.

[0054] In order to keep the motion states of the first drive gear set and the second drive gear set consistent, that is, when the hydraulic lifting mechanism 100 drives the carrier 210 to move in the vertical direction, the bottom end of the longitudinal transmission mechanism can slide in the chute 250 on the base 101, and the drive chains 233 connecting the first drive gear 221 and the third drive gear 231 and connecting the second drive gear 222 and the fourth drive gear 232 are in a tensioned state.

[0055] In some embodiments of the present application, the chute 250 is located on one side of the hydraulic lifting mechanism 100, and the chute 250 is used to carry the second drive gear set. Preferably, the depth of the chute is less than the tooth height of the third drive gear 231 and the fourth drive gear 232 in the second drive gear set. By such a setting, it is possible to avoid interference between the third drive gear 231 and the fourth drive gear 232 and the chute 250 during the transmission process, which helps to improve the transmission stability and can prevent the chute 250 from jamming the drive chain 233. Preferably, the width of the chute 250 is 115% of the tooth width of the third drive gear 231 and the fourth drive gear 232.

[0056] Optionally, a transmission channel for placing the transmission shaft 230 is provided between the chute walls close to the transmission shaft 230. When the second drive gear set and the transmission shaft 230 slide in the chute 250, the transmission shaft 230 can slide synchronously with the second drive gear set in the transmission channel. Through the above setting, the transmission shaft 230 can be restricted within the transmission channel to avoid vertical movement, and thus the stability of the second drive gear set and the transmission shaft 230 during the transmission process can be maintained.

[0057] Optionally, the length of the chute 250 is less than the length of the base 101, and the starting position and the ending position of the third drive gear 231 and the fourth drive gear 232 in the chute 250 do not exceed the edge of the base 101. The starting position can be the position where the third drive gear 231 and the fourth drive gear 232 are closest to the horizontal transmission mechanism in the chute 250, and the ending position can be the position where the third drive gear 231 and the fourth drive gear 232 are farthest from the horizontal transmission mechanism in the chute 250.

[0058] In some embodiments of the present application, the longitudinal transmission mechanism further includes a hand crank 260, which is connected to the transmission shaft 230. The second transmission gear set drives the first transmission gear set through the hand crank 260. That is to say, by rotating the hand crank 260 by the staff, the transmission shaft 230 can be driven to rotate circumferentially, and then the third transmission gear 231 and the fourth transmission gear 232 connected to the transmission shaft 230 can be driven to rotate circumferentially, and the first transmission gear set can be driven through the transmission chain 233. Optionally, the length of the hand crank 260 is less than the tooth height of the third transmission gear 231 and the fourth transmission gear 232. Through the above settings, it is beneficial for the staff to rotate the hand crank 260, and then drive the transmission shaft 230 to rotate circumferentially.

[0059] In some embodiments of the present application, the hydraulic lifting mechanism 100 is a scissor mechanism. In the wind power generation scenario, the axial flow fan is heavy, and the overlapping beam structure of the scissor-type hydraulic lifting mechanism can provide high stability and load-bearing capacity. Moreover, the scissor-type hydraulic lifting mechanism can realize lifting in the vertical direction, making it suitable for the application scenario of the present application.

[0060] In some embodiments of the present application, a pressure building pedal and a pressure relief pedal are further provided on the base 101, and the pressure building pedal and the pressure relief pedal are respectively connected to the hydraulic lifting mechanism 100.

[0061] Second, referring to Figure 2 as shown, Figure 2 This is the second working state of the axial flow fan replacement device according to the embodiment of the present application. In the second working state, the hydraulic lifting mechanism 100 in the axial flow fan replacement device is in the descending state, and the axial flow fan replacement device in the second working state can descend to the ground height, so that the staff can replace the axial flow fan on the ground.

[0062] It should be noted that in the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0063] In addition, in this application, unless otherwise clearly specified and defined, terms such as "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0065] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An axial flow fan replacement device, characterized in that: include: A hydraulic lifting mechanism and a transmission mechanism, wherein the hydraulic lifting mechanism comprises a base and an output end; The transmission mechanism comprises a loading platform, a horizontal transmission mechanism and a longitudinal transmission mechanism, and the horizontal transmission mechanism and the longitudinal transmission mechanism share a first transmission gear set; The loading platform carries the horizontal transmission mechanism, and the longitudinal transmission mechanism drives the first transmission gear set to work so as to drive the horizontal transmission mechanism to move in the horizontal direction, wherein the horizontal transmission mechanism is used to set the axial flow fan; The loading platform is fixedly connected to the output end of the hydraulic lifting mechanism. When the hydraulic lifting mechanism drives the loading platform to move in the vertical direction, the bottom end of the longitudinal transmission mechanism can slide in a slide groove provided on the base.

2. The axial flow fan replacement device according to claim 1, characterized in that: The horizontal transmission mechanism includes the first transmission gear set and a driving shaft, and a driven gear set and a driven shaft; The first transmission gear set includes a first transmission gear and a second transmission gear, and the first transmission gear and the second transmission gear are respectively sleeved on both ends of the driving shaft; The driven gear set comprises a first driven gear and a second driven gear, wherein the first driven gear and the second driven gear are sleeved at both ends of the driven shaft; Wherein, the first transmission gear set drives the driven gear set to move.

3. The axial flow fan replacement device according to claim 2, characterized in that: The longitudinal transmission mechanism includes the first transmission gear set and the drive shaft, and the second transmission gear set and the transmission shaft; The second transmission gear set includes a third transmission gear and a fourth transmission gear, and the third transmission gear and the fourth transmission gear are sleeved at both ends of the transmission shaft; Wherein, the second transmission gear set drives the first transmission gear set to move.

4. The axial flow fan replacement device according to claim 2, characterized in that: The tooth widths of the first driven gear and the second driven gear are smaller than the tooth widths of the first transmission gear and the second transmission gear.

5. The axial flow fan replacement device according to claim 4, characterized in that: The end surface of the first transmission gear close to the driving shaft and the end surface of the first driven gear close to the driven shaft are located in the same plane, and the end surface of the second transmission gear close to the driving shaft and the end surface of the second driven gear close to the driven shaft are located in the same plane.

6. The axial flow fan replacement device according to claim 5, characterized in that: The tooth width of the first transmission gear is at least greater than the sum of the widths of the first driven gear and the transmission chain, and the tooth width of the second transmission gear is at least greater than the sum of the widths of the second driven gear and the transmission chain, wherein the transmission chain is a chain connecting the first transmission gear group and the second transmission gear group.

7. The axial flow fan replacement device according to claim 3, characterized in that: The slide groove is located at one side of the hydraulic lifting mechanism, and the slide groove is used to carry the second transmission gear set.

8. The axial flow fan replacement device according to claim 3, characterized in that: The longitudinal transmission mechanism also includes a hand crank, which is connected to the transmission shaft, and the second transmission gear set drives the first transmission gear set to transmit through the hand crank.

9. The axial flow fan replacement device according to claim 1, characterized in that: The hydraulic lifting mechanism is a scissor-type mechanism.

10. The axial flow fan replacement device according to claim 1, characterized in that: A pressure building pedal and a pressure relief pedal are also provided on the base, and the pressure building pedal and the pressure relief pedal are respectively connected to the hydraulic lifting mechanism.

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