Wind driven generator transformer dragging device and method for entering and exiting tower drum

Abstract

The invention belongs to the technical field of operation and maintenance of wind driven generators, and discloses a wind driven generator transformer dragging device and a tower entering and exiting method.The wind driven generator transformer dragging device is arranged at a cabin door of a wind power tower and comprises a track platform and a rectangular framework formed by welding profile steel, the top surface of the rail platform is a movable rail surface of the transformer access cabin door and is horizontally arranged; the dragging mechanism comprises a moving frame, a push-pull acting cylinder and a clamping frame, the push-pull acting cylinder is arranged on the center line of the track platform in the length direction of the track platform, the bottom of the push-pull acting cylinder is installed on the clamping frame, and the clamping frame is connected with the transformer; a piston rod end of the push-pull acting cylinder is connected with a movable frame; two ends of the movable frame slide on the top surface of the track platform; and the locking assembly can lock and unlock the position of the movable frame on the top surface of the track platform. The device is directly installed at the cabin door of the tower drum, and the transformer is pulled out of or pushed back to the wind power tower drum in a pulling and pushing mode.

Description

Technical Field

[0001] The invention relates to the technical field of operation and maintenance of a wind turbine generator, and in particular to a wind turbine generator transformer towing device and a tower entry and exit method. Background Art

[0002] Wind power generation is a clean and renewable energy source, which has been widely used and developed in recent years. Wind power transformer is one of the key components in the wind power generation system. It is used for voltage conversion, circuit isolation and other functions. It usually converts the generator output 690V into 10kV high voltage and then transmits it to the wind farm power station. Wind power transformer ensures the stable operation of the wind power generation system. Equipment failure is inevitable. The transformer is located on the inner platform at the bottom of the tower. The transformer is usually hoisted out of the tower from the hatch at the top of the tower or the side of the tower. Compared with the main control cabinet or frequency conversion cabinet, the transformer cabinet contains iron core and coil, so its weight and size are large, and it is very difficult to carry the transformer.

[0003] Currently, if you want to remove a transformer that needs to be repaired from the top of the tower or the hatch, you need a professional crane or special lifting equipment. The existing operation process is to lift the transformer, move it horizontally, and lower it. Due to the limited space in the tower, the lifted transformer may shake and collide with the tower, thereby damaging the transformer. The lifting operation is very cumbersome. After the transformer is repaired, it needs to be transported back to the tower, which requires another complicated operation. The efficiency is too low and the operation cost is also high.

[0004] In order to overcome the above problems, a wind turbine transformer towing device and a method for entering and exiting the tower are needed. Summary of the invention

[0005] The purpose of the present invention is to provide a wind turbine transformer towing device and a tower entry and exit method, which are directly installed at the hatch of the tower and use pulling and pushing methods to pull the transformer out of or push it back into the wind turbine tower.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention discloses a wind turbine transformer towing device, which is arranged at a hatch of a wind turbine tower, and comprises:

[0008] The track platform is a rectangular frame formed by welding of steel sections. The top surface of the track platform is the moving track surface for the transformer to enter and exit the cabin. The top surface of the track platform is arranged horizontally.

[0009] The dragging mechanism comprises a moving frame, a push-pull cylinder and a clamping frame, wherein the push-pull cylinder is arranged on the center line of the track platform along its length direction, the bottom of the push-pull cylinder is installed on the clamping frame, and the clamping frame is connected to the transformer; the piston rod end of the push-pull cylinder is connected to the moving frame, and the two ends of the moving frame slide on the top surface of the track platform;

[0010] A locking assembly is capable of locking and unlocking the position of the moving frame on the top surface of the track platform.

[0011] Furthermore, a wear-resistant plate is provided on the top surface of the track platform, and both the movable frame and the transformer slide on the wear-resistant plate.

[0012] Furthermore, lower pin shaft holes are provided on the top surface of the track platform and the wear-resistant plate, and a plurality of the lower pin shaft holes are arranged at equal intervals on the long side of the track platform; two sets of the locking assemblies are respectively arranged at both ends of the mobile frame, and the locking assemblies include an action cylinder bracket, a latch action cylinder and a latch, and the latch action cylinder is respectively installed to the end of the mobile frame through the action cylinder bracket, and the latch is installed on the vertically downward piston rod of the latch action cylinder, and the latch can be inserted into the lower pin shaft hole.

[0013] Furthermore, an upper pin shaft hole is opened at the end of the movable frame, and the latch first passes through the upper pin shaft hole and then is inserted into the lower pin shaft hole to form a locking state.

[0014] Furthermore, a floating joint is installed at the end of the piston rod of the latch cylinder, and the threaded hole at the top of the floating joint is connected to the screw at the end of the piston rod of the latch cylinder. A screw section is coaxially arranged at the bottom end of the floating joint, and the screw section is threadedly connected to the threaded hole of the latch head. A lock nut is threadedly connected to the screw section, and the lock nut is tightened to the top surface of the latch head.

[0015] Furthermore, a clamping beam is provided on the side of the clamping frame facing the transformer, and the clamping beam is perpendicular to the long side of the track platform; the clamping beam clamps the shell base of the transformer through bolts and U-shaped clamps.

[0016] Furthermore, a lug seat is centrally arranged on one side of the movable frame facing the push-pull cylinder, a fisheye joint is arranged at the end of the piston rod of the push-pull cylinder, and the fisheye joint is hinged in the lug seat.

[0017] Furthermore, identification pits are provided at the tops of both ends of the movable frame, and identification lines are provided on the outer side of the lower pin shaft hole of the track platform. When the identification pits are aligned with the identification lines, the latch pin can be inserted into the upper pin shaft hole and the lower pin shaft hole to form a lock.

[0018] Furthermore, the bottom plate of the cylinder bracket is connected to the cross beam of the moving frame by bolts, and a rib plate is arranged between the vertical plate and the bottom plate of the cylinder bracket.

[0019] The present invention also discloses a method for a wind turbine transformer to enter and exit a tower, wherein the transformer is placed on a horizontal guide rail frame at a tower door, and the transformer is pushed or pulled step by step to enable the transformer to enter and exit the tower.

[0020] Compared with the prior art, the beneficial technical effects of the present invention are:

[0021] The wind turbine transformer towing device of the present invention can lock and unlock the moving frame by setting the locking assembly, and can switch the moving frame to different positions on the top surface of the track platform to achieve long-distance pulling or pushing of the transformer. By setting the push-pull cylinder, the pulling or pushing action can be achieved within a telescopic stroke range of the push-pull cylinder. The track platform adopts a rectangular frame formed by welding of steel sections, which not only serves as a guide member but also as a supporting bridge across the hatch of the wind turbine tower. The wind turbine transformer towing device of the present invention is directly installed at the hatch of the tower, and uses pulling and pushing methods to pull the transformer out of or push it back into the wind turbine tower.

[0022] In addition, by laying a wear-resistant plate on the top surface of the track platform, the bottom surface of the transformer base slides on the wear-resistant plate, which reduces the friction coefficient and protects the track platform. When the wear-resistant plate is worn, it can be repaired by replacing the wear-resistant plate. The bolt cylinder drives the bolt to connect or release the pin shaft of the mobile frame to the top surface of the track platform. This pin connection method is convenient for rapid locking and unlocking, and has a large connection strength, which can meet the driving force requirements for pulling or pushing the transformer. By adding an upper pin shaft hole, the connection strength can be increased and the strength requirements for the bolt cylinder can be reduced. By setting a floating joint, even if the coaxiality of the upper pin shaft hole and the lower pin shaft hole is poor, they can be aligned and inserted, reducing the bending stress on the bolt cylinder and reducing the wear of the cylinder. Moreover, the height position of the initial state of the bolt can be adjusted by adjusting the length of the screw segment entering the threaded hole of the bolt head. By setting a clamping crossbeam, it is convenient to establish a connection relationship with the shell base of the transformer. The U-shaped card is used for clamping. The surrounding connection method has good stability and is not easy to fall off or damage the connection point. By hingedly connecting the moving frame and the piston rod end of the push-pull cylinder, compared with the method of fixed connection at both ends, the push-pull cylinder is prevented from being subjected to a large lateral bending moment, which is easy to increase the friction between the piston or piston rod and the cylinder barrel, and reduce the service life of the cylinder. The setting of the marking pit and the marking line makes it easy for the operator to observe whether the moving frame is pushed into place. After it is pushed into place, the latch can smoothly penetrate the upper pin shaft hole and the lower pin shaft hole to form a lock. By adding a rib plate between the vertical plate and the bottom plate of the cylinder bracket, the structural rigidity and strength of the cylinder bracket are increased, and the installation position of the latch cylinder will not be deformed, so that the latch can move smoothly.

[0023] The method for the wind turbine transformer to enter and exit the tower of the present invention realizes the change of the horizontal position of the transformer being acted on. Compared with the vertical lifting-horizontal movement-vertical landing method adopted in the existing operation method, it saves time cost and on-site management cost, avoids collision damage, and improves the work efficiency of transformer installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the main structure of the towing device of the transformer of the wind turbine generator of the present invention;

[0026] Figure 2 It is a schematic diagram of the top view of the structure of the towing device of the transformer of the wind turbine generator of the present invention;

[0027] Figure 3 It is a left-side structural schematic diagram of the wind turbine transformer towing device of the present invention;

[0028] Figure 4This is a front view structural diagram of the installation part of the latch action cylinder in the present invention;

[0029] Figure 5 It is a schematic diagram of the top view of the dragging mechanism in the present invention.

[0030] Explanation of the reference numerals: 1. Track platform; 101. Wear-resistant plate; 102. Lower latch hole; 103. Connecting plate; 104. Identification line; 2. Moving frame; 201. Lug seat; 202. Upper pin shaft hole; 203. Identification pit; 3. Cylinder bracket; 301. Bottom plate; 302. Rib plate; 4. Latch cylinder; 5. Floating joint; 501. Screw section; 6. Latch; 7. Push-pull cylinder; 8. Clamping frame; 801. Clamping beam; 9. Transformer. DETAILED DESCRIPTION

[0031] The core of the present invention is to provide a wind turbine transformer towing device and a tower entry and exit method, which are directly installed at the hatch of the tower and use pulling and pushing methods to pull the transformer out of or push it back into the wind turbine tower.

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] With reference to the accompanying drawings, Figure 1 It is a schematic diagram of the main structure of the towing device of the transformer of the wind turbine generator of the present invention; Figure 2 It is a schematic diagram of the top view of the structure of the towing device of the transformer of the wind turbine generator of the present invention; Figure 3 It is a left-side structural schematic diagram of the wind turbine transformer towing device of the present invention; Figure 4 This is a front view structural diagram of the installation part of the latch action cylinder in the present invention; Figure 5 It is a schematic diagram of the top view of the dragging mechanism in the present invention.

[0035] In a specific embodiment, Figures 1 to 5As shown, the wind turbine transformer towing device of the present invention is arranged at the hatch of the wind turbine tower, and comprises:

[0036] The track platform 1 is a rectangular frame formed by welding steel sections, with the long sides made of I-beams and the horizontal sides welded with steel plates. The track platform 1 is set across the hatch of the wind turbine tower, and the inner and outer ends of the track platform 1 are respectively placed on the platform inside the tower and the step platform outside the tower using cushion beams and cushion blocks. The top surface of the track platform 1 is the moving track surface for the transformer 9 to enter and exit the hatch. The top surface of the track platform 1 is set horizontally. In order to reduce the friction resistance between the bottom surface of the base of the transformer 9 and the top surface of the track platform 1, lubricating grease can be applied to the top surface of the track platform 1.

[0037] The dragging mechanism includes a moving frame 2, a push-pull cylinder 7 and a clamping frame 8. The push-pull cylinder 7 is arranged on the center line of the track platform 1 along the length direction thereof, the bottom of the push-pull cylinder 7 is installed on the clamping frame 8, and the base of the push-pull cylinder 7 is installed on the clamping frame 8 by bolts. The clamping frame 8 is connected to a transformer 9. The piston rod end of the push-pull cylinder 7 is connected to the moving frame 2, and the two ends of the moving frame 2 slide on the top surface of the track platform 1.

[0038] A locking assembly, which can lock and unlock the position of the moving frame 2 on the top surface of the track platform 1.

[0039] By setting the locking assembly to lock and unlock the mobile frame 2, the mobile frame 2 can be switched to different positions on the top surface of the track platform 1 to achieve long-distance pulling or pushing of the transformer 9. By setting the push-pull cylinder 7, the pulling or pushing action can be achieved within a telescopic stroke range of the push-pull cylinder 7. The track platform 1 adopts a rectangular frame formed by welding of steel sections, which not only serves as a guide member but also as a supporting bridge across the hatch of the wind turbine tower. The wind turbine transformer towing device of the present invention is directly installed at the hatch of the tower, and the transformer is pulled out or pushed back into the wind turbine tower by pulling and pushing.

[0040] In a specific embodiment of the present invention, Figures 1 to 3 As shown, a wear-resistant plate 101 is provided on the top surface of the track platform 1 , and the moving frame 2 and the transformer 9 both slide on the wear-resistant plate 101 .

[0041] Specifically, the wear-resistant plate 101 is made of stainless steel and is installed on the top surface of the track platform 1 using countersunk screws. In order to reduce the friction resistance between the bottom surface of the transformer 9 base and the wear-resistant plate 101, lubricating grease can be applied to the top surface of the wear-resistant plate 101.

[0042] By laying the wear-resistant plate 101 on the top surface of the track platform 1, the bottom surface of the transformer 9 base slides on the wear-resistant plate 101, which reduces the friction coefficient and also protects the track platform 1. When the wear-resistant plate 101 is worn, it can be repaired by simply replacing the wear-resistant plate 101.

[0043] In a specific embodiment of the present invention, Figures 1 to 4 As shown, lower pin holes 102 are provided on the top surface of the track platform 1 and the wear-resistant plate 101, and multiple lower pin holes 102 are arranged at equal intervals on the long side of the track platform 1. Two sets of the locking components are respectively arranged at both ends of the mobile frame 2, and are symmetrically arranged about the center line of the mobile frame 2. The locking component includes an action cylinder bracket 3, a latch action cylinder 4 and a latch 6. The latch action cylinder 4 is respectively installed to the end of the mobile frame 2 through the action cylinder bracket 3, and the latch action cylinder 4 has a piston rod vertically downward to install the latch 6, and the latch 6 can be inserted into the lower pin hole 102.

[0044] Specifically, the latch cylinder 4 and the push-pull cylinder 7 are both hydraulic cylinders, which can ensure sufficient pulling and pushing strength.

[0045] Specifically, if Figures 1 to 3 and Figure 5 As shown, an upper pin hole 202 is provided at the end of the mobile frame 2, and the latch 6 first passes through the upper pin hole 202 and then is inserted into the lower pin hole 102 to form a lock. In other words, the upper pin hole 202 and the lower pin hole 102 have equal diameters and can be coaxial when the mobile frame 2 moves and aligns.

[0046] Specifically, if Figure 1 , Figure 3 and Figure 4 As shown, a floating joint 5 is installed at the end of the piston rod of the latch cylinder 4, and the threaded hole at the top of the floating joint 5 is connected to the screw at the end of the piston rod of the latch cylinder 4. A screw segment 501 is coaxially arranged at the bottom of the floating joint 5, and the screw segment 501 is threadedly connected to the threaded hole of the head of the latch 6. A lock nut is threadedly connected to the screw segment 501, and the lock nut is tightened to the top surface of the head of the latch 6.

[0047] Specifically, the floating joint 5 is a universal swing floating joint. When the latch cylinder 4 is retracted, the bottom end of the latch 6 is still plugged into the upper part of the upper pin shaft hole 202 .

[0048] Obviously, the locking assembly can also use a servo motor to drive the screw to rotate, and the screws are connected to different threaded holes, and a plurality of threaded holes arranged at equal intervals are opened on the top surface of the track platform 1 to lock and unlock the mobile frame 2 on the top surface of the track platform 1. Similar simple replacement methods also fall within the protection scope of the present invention.

[0049] The latch 6 is driven by the latch cylinder 4 to connect the pin of the mobile frame 2 to the top surface of the track platform 1 or to release the pin. This pin connection method is convenient for rapid locking and unlocking, and has a large connection strength, which can meet the driving force requirements for pulling or pushing the transformer 9. By adding the upper pin hole 202, the connection strength can be increased and the strength requirements for the latch cylinder 4 can be reduced. Through the setting of the floating joint 5, even if the coaxiality of the upper pin hole 202 and the lower pin hole 102 is poor, they can be aligned and inserted, which reduces the bending stress on the latch cylinder 4 and reduces the wear of the action cylinder. In addition, the height position of the initial state of the latch 6 can be adjusted by adjusting the length of the screw segment 501 entering the threaded hole of the head of the latch 6.

[0050] In a specific embodiment of the present invention, Figures 1 to 3 and Figure 5 As shown, a clamping beam 801 is provided on the side of the clamping frame 8 facing the transformer 9, and the clamping beam 801 is perpendicular to the long side of the track platform 1; the clamping beam 801 clamps the shell base of the transformer 9 through bolts and U-shaped clamps. The U-shaped clamp and the clamping beam 801 surround the shell bottom of the transformer 9 for clamping.

[0051] Obviously, if the transformer 9 shell base is provided with a threaded hole on the side facing the clamping beam 801, the bolt can also be directly passed through the through hole of the clamping beam 801 and then connected to the threaded hole. Similar simple replacement methods all fall within the protection scope of the present invention.

[0052] The clamping crossbeam 801 is provided to facilitate the establishment of a connection relationship with the shell base of the transformer 9. The U-shaped clamp is used for clamping, and the surrounding connection method has good stability and is not prone to falling off or damage to the connection point.

[0053] In a specific embodiment of the present invention, Figure 1 , Figure 2 and Figure 5 As shown, a lug seat 201 is centrally arranged on one side of the mobile frame 2 facing the push-pull cylinder 7 , and a fisheye joint is arranged at the piston rod end of the push-pull cylinder 7 , and the fisheye joint is hinged in the lug seat 201 through a pin shaft.

[0054] Specifically, if Figure 2 and Figure 5 As shown, a marking pit 203 is centrally arranged at the top of both ends of the mobile frame 2, and a marking line 104 is arranged outside the lower pin shaft hole 102 of the track platform 1. The marking line 104 is a short horizontal line and is arranged along the width direction of the track platform 1. When the marking pit 203 is aligned with the marking line 104, the latch 6 can penetrate into the upper pin shaft hole 202 and the lower pin shaft hole 102 to form a lock.

[0055] Specifically, in order to facilitate observation of the marking pit 203 and the marking line 104, the grooves are formed and then filled with bright yellow paint for marking.

[0056] By hingedly connecting the moving frame 2 and the piston rod end of the push-pull cylinder 7, compared with the method of fixed connection at both ends, the push-pull cylinder 7 is prevented from being subjected to a large lateral bending moment, which is easy to increase the friction between the piston or piston rod and the cylinder barrel, and reduce the service life of the cylinder. The setting of the marking pit 203 and the marking line 104 facilitates the operator to observe whether the moving frame 2 is pushed into place, and after being pushed into place, the latch 6 can smoothly penetrate the upper pin shaft hole 202 and the lower pin shaft hole 102 to form a lock.

[0057] In a specific embodiment of the present invention, Figures 1 to 5 As shown, the bottom plate 301 of the cylinder support 3 is connected to the cross beam of the mobile frame 2 by bolts, and a rib plate 302 is provided between the vertical plate of the cylinder support 3 and the bottom plate 301. The latch cylinder 4 is installed on the vertical plate of the cylinder support 3 through two L-shaped bracket plates.

[0058] By adding rib plates 302 between the vertical plate and the bottom plate 301 of the cylinder bracket 3, the structural rigidity and strength of the cylinder bracket 3 are increased, and the installation position of the latch cylinder 4 will not be deformed, so that the latch 6 can move smoothly.

[0059] The working principle of the wind turbine transformer towing device of the present invention is as follows: after the present invention is assembled at the hatch of the wind turbine tower, a proper amount of lubricating grease is applied to the surface of the wear-resistant plate 101. The platform inside the tower uses a simple gantry or a crane built into the tower to lift the disassembled transformer and place it on the inner end of the track platform 1. The bottom of the outer shell of the transformer 9 is surrounded by bolts using a U-shaped card and a clamping beam 801 to complete the clamping connection. Operate the control panel of the hydraulic pump station to adjust the ejection length of the push-pull cylinder 7 so that it pushes the mobile frame 2 within a larger ejection stroke range. After observing that the marking pit 203 on the mobile frame 2 is aligned with the marking lines 104 on both sides, manually align if deflection occurs. Operate the control panel of the hydraulic pump station, the latch cylinder 4 is ejected, and the latch 6 passes through the upper pin shaft hole 202 and is then inserted into the lower pin shaft hole 102 to form a lock, which is used to limit the movement of the mobile frame 2. Then operate the control panel of the hydraulic pump station, the push-pull cylinder 7 contracts, drives the clamping frame 8, and moves the transformer 9 a fixed distance outside the tower. Operate the control panel of the hydraulic pump station, the latch cylinder 4 contracts to pull the latch 6 out of the lower pin shaft hole 102. Then, the push-pull cylinder 7 pushes out again to move the moving frame 2 to the outer end of the track platform 1 to a fixed distance between the lower pin shaft hole 102, and the latch cylinder 4 pushes out again to position the latch 6 in the lower pin shaft hole 102. The push-pull cylinder 7 contracts to drag the transformer 9 outward. Repeated operations are performed sequentially to drag the transformer 9 out of the tower. When the transformer 9 needs to be sent into the tower, the reverse operation can be performed.

[0060] In summary, the wind turbine transformer towing device of the present invention can lock and unlock the mobile frame 2 by setting the locking assembly, and can switch the mobile frame 2 to different positions on the top surface of the track platform 1 to achieve long-distance pulling or pushing of the transformer 9. By setting the push-pull cylinder 7, the pulling or pushing action can be achieved within a telescopic stroke range of the push-pull cylinder 7. The track platform 1 adopts a rectangular frame formed by welding of steel sections, which not only serves as a guide member but also as a supporting bridge across the hatch of the wind turbine tower. The wind turbine transformer towing device of the present invention is directly installed at the hatch of the tower, and the transformer is pulled out or pushed back into the wind turbine tower by pulling and pushing. In addition, by laying a wear-resistant plate 101 on the top surface of the track platform 1, the bottom surface of the base of the transformer 9 slides on the wear-resistant plate 101, which reduces the friction coefficient and also protects the track platform 1. After the wear-resistant plate 101 is worn, it can be repaired by replacing the wear-resistant plate 101. The bolt cylinder 4 drives the bolt 6 to realize the pin connection of the mobile frame 2 or the release of the pin connection to the top surface of the track platform 1. This pin connection method is convenient for realizing quick locking and unlocking, and has a large connection strength, which can meet the driving force requirements of pulling or pushing the transformer 9. By adding the upper pin hole 202, the connection strength can be increased and the strength requirements of the bolt cylinder 4 can be reduced. Through the setting of the floating joint 5, even if the coaxiality of the upper pin hole 202 and the lower pin hole 102 is poor, they can be aligned and inserted, reducing the bending stress on the bolt cylinder 4 and reducing the wear of the cylinder. Moreover, the height position of the initial state of the bolt 6 can be adjusted by adjusting the length of the screw segment 501 entering the threaded hole of the head of the bolt 6. By setting the clamping crossbeam 801, it is convenient to establish a connection relationship with the shell base of the transformer 9, and the U-shaped card is used for clamping. The surrounding connection method has good stability and is not easy to fall off or damage the connection point. By hingedly connecting the piston rod ends of the mobile frame 2 and the push-pull cylinder 7, compared with the method of fixed connection at both ends, the push-pull cylinder 7 is prevented from being subjected to a large lateral bending moment, which is easy to increase the friction between the piston or piston rod and the cylinder barrel, and reduce the service life of the cylinder. The setting of the marking pit 203 and the marking line 104 makes it convenient for operators to observe whether the mobile frame 2 is pushed into place. After being pushed into place, the latch 6 can smoothly penetrate the upper pin shaft hole 202 and the lower pin shaft hole 102 to form a lock. By adding a rib plate 302 between the vertical plate and the bottom plate 301 of the cylinder bracket 3, the structural rigidity and strength of the cylinder bracket 3 are increased, and the installation position of the latch cylinder 4 will not be deformed, so that the latch 6 can move smoothly.

[0061] The present invention also discloses a method for a wind turbine transformer to enter and exit a tower, wherein a transformer 9 is placed on a horizontal guide rail frame at a tower door, and the transformer 9 is pushed or pulled step by step to enable the transformer 9 to enter and exit the tower.

[0062] Specifically, the wind turbine transformer towing device in any of the above embodiments is used to drag or push the transformer 9 in and out of the tower.

[0063] The method for the wind turbine transformer to enter and exit the tower of the present invention realizes the horizontal position change of the transformer 9 to be acted on. Compared with the vertical lifting-horizontal movement-vertical landing method adopted in the existing operation method, it saves time cost and on-site management cost, avoids collision damage, and improves the work efficiency of installing and disassembling the transformer 9.

[0064] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0065] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A wind turbine transformer towing device, arranged at the hatch of a wind turbine tower, characterized in that: include: The track platform (1) is a rectangular frame formed by welding steel sections, the top surface of the track platform (1) is a movable track surface for the transformer (9) to enter and exit the cabin, and the top surface of the track platform (1) is arranged horizontally; The dragging mechanism comprises a moving frame (2), a push-pull cylinder (7) and a clamping frame (8), wherein the push-pull cylinder (7) is arranged on the center line of the track platform (1) along its length direction, the bottom of the push-pull cylinder (7) is installed on the clamping frame (8), and the clamping frame (8) is connected to the transformer (9); the piston rod end of the push-pull cylinder (7) is connected to the moving frame (2), and the two ends of the moving frame (2) slide on the top surface of the track platform (1); A locking assembly, wherein the locking assembly is capable of locking and unlocking the position of the mobile frame (2) on the top surface of the track platform (1).

2. The wind turbine transformer towing device according to claim 1, characterized in that: A wear-resistant plate (101) is provided on the top surface of the track platform (1), and both the moving frame (2) and the transformer (9) slide on the wear-resistant plate (101).

3. The wind turbine transformer towing device according to claim 2, characterized in that: The top surface of the track platform (1) and the wear-resistant plate (101) are both provided with lower pin shaft holes (102), and a plurality of the lower pin shaft holes (102) are arranged at equal intervals on the long side of the track platform (1); two sets of the locking components are respectively arranged at the two ends of the mobile frame (2), and the locking components include an action cylinder bracket (3), a latch action cylinder (4) and a latch (6); the latch action cylinder (4) is respectively installed on the end of the mobile frame (2) through the action cylinder bracket (3); the latch (6) is installed on the piston rod of the latch action cylinder (4) facing vertically downward, and the latch (6) can be inserted into the lower pin shaft hole (102).

4. The wind turbine transformer towing device according to claim 3 is characterized in that: An upper pin shaft hole (202) is provided at the end of the movable frame (2), and the latch pin (6) first passes through the upper pin shaft hole (202) and then is inserted into the lower pin shaft hole (102) to form a locking state.

5. The wind turbine transformer towing device according to claim 4, characterized in that: A floating joint (5) is installed at the end of the piston rod of the latch cylinder (4); the threaded hole at the top of the floating joint (5) is connected to the screw at the end of the piston rod of the latch cylinder (4); a screw section (501) is coaxially arranged at the bottom of the floating joint (5); the screw section (501) is threadedly connected to the threaded hole of the head of the latch (6); a lock nut is threadedly connected to the screw section (501); and the lock nut is tightened to the top surface of the head of the latch (6).

6. The wind turbine transformer towing device according to any one of claims 1 to 5, characterized in that: A clamping crossbeam (801) is provided on the side of the clamping frame (8) facing the transformer (9), and the clamping crossbeam (801) is perpendicular to the long side of the track platform (1); the clamping crossbeam (801) is used to clamp the housing base of the transformer (9) through bolts and U-shaped clamps.

7. The wind turbine transformer towing device according to claim 4, characterized in that: A support ear seat (201) is centrally arranged on one side of the movable frame (2) facing the push-pull cylinder (7), and a fisheye joint is arranged at the end of the piston rod of the push-pull cylinder (7), wherein the fisheye joint is hinged in the support ear seat (201).

8. The wind turbine transformer towing device according to claim 7, characterized in that: The tops of both ends of the movable frame (2) are provided with identification pits (203), and the track platform (1) is provided with identification lines (104) on the outside of the lower pin shaft hole (102). When the identification pits (203) are aligned with the identification lines (104), the latch pin (6) can be inserted into the upper pin shaft hole (202) and the lower pin shaft hole (102) to form a locking state.

9. The wind turbine transformer towing device according to claim 3, characterized in that: The bottom plate (301) of the cylinder support (3) is connected to the cross beam of the moving frame (2) by means of bolts, and a rib plate (302) is provided between the vertical plate and the bottom plate (301) of the cylinder support (3).

10. A method for a wind turbine transformer to enter and exit a tower, characterized in that: The transformer (9) is placed on a horizontal guide rail frame at the tower door, and the transformer (9) is pushed or pulled step by step to enable the transformer (9) to enter and exit the tower.

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