A pin-removing device, pin-removing system, and method of use for use in wind turbine towers.

Abstract

This invention relates to the field of tooling technology for wind turbine towers, specifically to a pin-pulling device, pin-pulling system, and method of use for wind turbine towers. A pin-pulling device for wind turbine towers includes: a base with a first through hole, the first bottom surface of which is adapted to fit against the working surface; a lifting device in contact with the base, the second bottom surface of which fits against the first top surface of the base; a force transmission block, the third bottom surface of which fits against the second top surface of the lifting device, the force transmission block having a second through hole; a lifting rod passing through the first and second through holes; and a locking block located on the side of the force transmission block opposite to the lifting device. This invention provides a pin-pulling device, pin-pulling system, and method of use for wind turbine towers to solve the problem of difficult operation when removing the bearing pin during bearing replacement inside the wind turbine tower due to obstructed crossbeams covering the pin.

Description

Technical Field

[0001] This invention relates to the field of tooling technology for wind turbine towers, specifically to a pin-pulling device, pin-pulling system, and method of use for wind turbine towers. Background Technology

[0002] Traditionally, wind turbines are installed in complex terrains such as high mountains, wilderness, Gobi Desert, and coastal areas, and are constantly subjected to severe weather conditions such as strong winds and torrential rains. When exposed to high temperatures in summer and freezing temperatures in winter, the components inside the impeller and blade housing undergo thermal expansion and contraction due to sudden temperature changes, which exacerbates the wear and aging of key components such as bearings, gearboxes, and seals.

[0003] In particular, for some coastal and offshore wind turbines, which operate in environments with high salt spray, high humidity, and strong corrosion, salt and water vapor in the air can quickly enter the turbine's interior, corroding the steel structure, electrical cabinets, and connectors, causing damage to components. For wind turbines in onshore and field environments, which operate in environments with sandstorms, rain, snow, and frost, sand and dust entering the transmission system will accelerate wear, icing will affect the dynamic balance of the blades and power generation efficiency, and freezing may also cause brake and hydraulic system failures.

[0004] In summary, wind turbines operate in harsh, unattended outdoor environments for extended periods, placing extremely high demands on equipment reliability and durability.

[0005] As is well known, wind turbine nacelles are typically located at altitudes of 60-120 meters. The working platform space is narrow, the number of attachment points inside the nacelle is limited, and large tooling equipment is difficult to deploy, further exacerbating the difficulty of operations for personnel inside.

[0006] If a component inside the wind turbine is damaged, it needs to be replaced or repaired. Workers must perform complex actions such as hoisting, positioning, and disassembling the component in a confined space. For bearings inside the wind turbine tower, the bearings are large in size and heavy in weight, and workers need to use tools to exchange them. The bearings and their supporting tooling (such as pullers and heaters) are mostly heavy components.

[0007] In actual operation, when replacing the bearings inside the wind tower, it is necessary to pull out the pins on the bearings. However, because the pins are covered by crossbeams that obstruct construction, the operating space inside the wind tower is very small, which makes the operation difficult. Summary of the Invention

[0008] This invention provides a pin-pulling device, pin-pulling system, and method for use inside a wind turbine tower. This addresses the problem that during actual operation, when replacing bearings inside a wind turbine tower, it is difficult to remove the pins because the pins are covered by beams that obstruct construction, resulting in very limited operating space inside the tower.

[0009] In a first aspect, the present invention provides a pin-removing device for use inside a wind turbine tower, comprising: A base, wherein the base is provided with a first through hole, and the first bottom surface of the base is adapted to fit against the working surface; A lifting device is provided, wherein the lifting device contacts the base, and the second bottom surface of the lifting device is fitted to the first top surface of the base; The force transmission block has its third bottom surface fitted to the second top surface of the lifting device, and the force transmission block has a second through hole. A lifting rod is provided, which passes through the first through hole and the second through hole, and the connecting end of the lifting rod passing through the first through hole is adapted to be connected to the pin exposed on the working surface; A locking block is provided on the side of the force transmission block away from the lifting device, and the locking block is rotatably connected to the locking end of the lifting rod away from the connecting end; The lifting rod passes through the first through hole and is suitable for connecting with the exposed pin on the working surface. The lifting device pushes the force transmission block to rise relative to the base. The force transmission block drives the locking block and the lifting rod to rise. After rising to the first distance, the lifting device retracts, the force transmission block descends under the action of gravity, and the locking block rotates relative to the lifting rod towards the base a first distance, causing the pin to rise a first distance. Repeat the above process, using the lifting device to repeatedly raise and lower the rod, accumulating the distance of the lifting rod several times, in order to pull out the pin.

[0010] Beneficial effects: The lifting rod passes through the first through hole to connect with the exposed pin on the working surface. The jack pushes the force transmission block to rise relative to the base. The force transmission block drives the locking block and the lifting rod to rise. After rising to the first distance, the jack retracts, the force transmission block descends under gravity, and the locking block rotates relative to the lifting rod towards the base a first distance, causing the pin to rise a first distance. Through repeated lifting and lowering movements of the jack, several distances are accumulated to pull out the pin. Based on the repeated lifting and lowering movements of the jack, the jack can lift and lower in a confined space without long-distance movement. The entire device, except for the lifting rod (which does not interfere with the position of other structures inside the wind tower during lifting), will not experience long-distance movement, meeting the requirements for operation in confined spaces and facilitating on-site operation. It should be noted that the locking block and the locking end of the lifting rod are connected by a threaded rotation.

[0011] In one optional embodiment, the central axis of the first through hole and the central axis of the second through hole are arranged to coincide, the central axis of the first through hole is arranged to coincide with the central axis of the lifting rod, the first through hole is rectangular, the second through hole is elongated, and the area of ​​the first through hole is larger than the area of ​​the second through hole.

[0012] Beneficial effects: The central axes of the first and second through holes coincide, and the central axis of the first through hole coincides with the central axis of the lifting rod, enabling the lifting rod to rise and fall around its own central axis, ensuring the stability of force transmission. By setting the area of ​​the first through hole to be larger than that of the second through hole, the length of the base ( Figure 1 The X-direction in the middle is greater than the length of the force transmission block and the width of the base. Figure 1 The width of the force transmission block is greater than the width of the Y-direction (in the middle), forming along the... Figure 1 The structure has a lower cross section in the Z direction that is larger than the upper cross section, ensuring the stability of the structure.

[0013] In one optional embodiment, the number of lifting devices is two, and the two lifting devices are symmetrically arranged on both sides of the first through hole, with an adjustment block provided between each lifting device and the base.

[0014] Beneficial effects: The two lifting devices extend along the length of the base ( Figure 1 The lifting rod is symmetrically positioned in the X direction, so that it is located between two jacks. The lifting rod can be raised and lowered simultaneously through the lifting ends of the two jacks, which can achieve stability in applying force to the lifting rod.

[0015] In an optional embodiment, the device further includes a rotating shaft and two fixing blocks. The force transmission block has two spaced-apart support ends on the side opposite to the lifting device. Each support end has a support half-ring, which is adapted to the rotating shaft. One support half-ring corresponds to one fixing block. The rotating shaft is accommodated between the fixing block and the support end. The fixing block and the support end are connected by fasteners.

[0016] Beneficial effect: The connection between the fixing block and the support end serves to fix the rotating shaft, ensuring that the rotating shaft will not rotate during the movement of the lifting rod.

[0017] In one optional embodiment, the rotating shaft is provided with a through hole, the lifting rod is disposed through the through hole, a gap is left between the lifting rod and the through hole, and the outer diameter of the rotating shaft is smaller than the length of the second through hole.

[0018] Beneficial effect: By leaving a gap between the lifting rod and the through hole, the lifting rod is prevented from running along the through hole. Figure 1 In the Z direction, it is affected by the position interference of the rotation axis.

[0019] In one alternative embodiment, a cushioning pad is also included, which is provided on the first bottom surface of the base.

[0020] Beneficial effect: By setting up a buffer pad, rigid collisions between the base and the working surface are avoided.

[0021] In one alternative embodiment, a quick-release screw is also included, and the base has at least two third through holes, with the quick-release screw passing through each of the third through holes.

[0022] Beneficial effect: The quick-release screws enable rapid connection and disassembly between the base and the working surface.

[0023] Secondly, the present invention also provides a pin-pulling system, including the aforementioned pin-pulling device for use in wind turbine towers.

[0024] In one optional embodiment, the system further includes a power pump, a pressure regulating valve, a first pipeline, and a second pipeline. The first pipeline connects the power pump and the inlet of the pressure regulating valve. The pressure regulating valve has two outlets. A second pipeline is provided between one outlet of the pressure regulating valve and one of the lifting devices.

[0025] Beneficial effects: The second pipeline consists of two lines, powered by a power pump. Power is evenly distributed within the pressure regulating valve before reaching the lifting device, which then drives the lifting end of the lifting device to move up and down. Specifically, the power pump is a hydraulic pump, and the lifting device is a lifting hydraulic cylinder.

[0026] Thirdly, the present invention also provides a method for using a pin-pulling device inside a wind turbine tower. A lifting rod passes through a first through hole to be connected to a pin exposed on the working surface. A jack pushes a force transmission block to rise relative to the base. The force transmission block drives a locking block and a lifting rod to rise. After rising to a first distance, the jack retracts, the force transmission block descends under gravity, and the locking block rotates relative to the lifting rod toward the base a first distance, causing the pin to rise a first distance. The above process is repeated. By repeatedly raising and lowering the jack, the lifting rod accumulates several distances to pull out the pin. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the pin-pulling device according to an embodiment of the present invention; Figure 2This is a schematic diagram showing the cooperation of the force transmission block, rotating shaft, and fixing block in an embodiment of the present invention; Figure 3 This is a schematic diagram of the force transmission block according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the rotating shaft according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the lifting device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the lifting rod according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the pin-pulling device in an abnormal working condition according to an embodiment of the present invention. Figure 8 This is a schematic diagram of the pin-removing system according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the pin-pulling device in the wind turbine tower space according to an embodiment of the present invention; Figure 10 This is a front view of the pin-pulling device in an embodiment of the present invention located within the wind turbine tower space; Figure 11 for Figure 10 An enlarged schematic diagram of direction A; Figure 12 This is a schematic diagram of the lifting end of the jacking device after it has been extended according to an embodiment of the present invention; Figure 13 This is a schematic diagram of the lifting rod rising a first distance after the retraction of the lifting device according to an embodiment of the present invention; Figure 14 This is a schematic diagram of the lifting rod rising a first distance after the retraction of the lifting device according to an embodiment of the present invention, after which the locking block is locked.

[0029] Explanation of reference numerals in the attached drawings: 1. Base; 101. First through hole; 102. First top surface; 2. Lifting device; 201. Cylinder; 202. Lifting end; 203. Interface end; 204. Second top surface; 205. Second bottom surface; 3. Force transmission block; 301. Block; 302. Third top surface; 303. Limiting groove; 304. Second through hole; 305. Support end; 306. Support semi-ring; 307. Third bottom surface 4. Lifting rod; 401. Connecting end; 402. Locking end; 403. Rod body; 5. Locking block; 6. Fixing block; 7. Rotating shaft; 701. Rotating end; 702. Support surface; 703. Through hole; 8. Buffer pad; 9. Quick release screw; 10. Limiting plate; 11. Power pump; 12. First pipeline; 13. Pressure regulating valve; 14. Second pipeline; 15. Pin shaft; 16. Horizontal plane; 17. Adjusting block. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The following is combined with Figures 1 to 14 The following describes embodiments of the present invention.

[0032] According to an embodiment of the present invention, in one aspect, a pin-pulling device for use inside a wind turbine tower is provided, comprising: a base 1, the base 1 having a first through hole 101, and a first bottom surface of the base 1 adapted to be in contact with a working surface; a lifting device 2, the lifting device 2 contacting the base 1, the second bottom surface 205 of the lifting device 2 being in contact with the first top surface 102 of the base 1; a force transmission block 3, the third bottom surface 307 of the force transmission block 3 being in contact with the second top surface 204 of the lifting device 2, the force transmission block 3 having a second through hole 304; a lifting rod 4, the lifting rod 4 passing through the first through hole 101 and the second through hole 304, the connecting end 401 of the lifting rod 4 passing through the first through hole 101 being adapted to be connected to a pin 15 exposed on the working surface; and a locking block 5, the locking block 5 being disposed on the side of the force transmission block 3 away from the lifting device 2, the locking block 5 being rotatably connected to the locking end 402 of the lifting rod 4 away from the connecting end 401.

[0033] The lifting rod 4 passes through the first through hole 101 and is adapted to connect with the exposed pin 15 on the working surface. The lifting device 2 pushes the force transmission block 3 to rise relative to the base 1. The force transmission block 3 drives the locking block 5 and the lifting rod 4 to rise. After rising to the first distance, the lifting device 2 retracts, the force transmission block 3 descends under the action of gravity, and the locking block 5 rotates relative to the lifting rod 4 towards the base 1 a first distance, causing the pin 15 to rise a first distance. Through repeated lifting and lowering movements of the lifting device 2, several distances are accumulated to pull out the pin 15. By repeating the above process, based on the repeated lifting and lowering movements of the lifting device 2, the lifting device 2 can achieve lifting and lowering in a confined space without long-distance movement. The entire device, except for the lifting rod 4 (which will not interfere with the position of other structures inside the wind tower during the lifting process), will not experience long-distance movement, meeting the requirements for operation in confined spaces and facilitating on-site operation. In this embodiment, the lifting device 2 is a hydraulic cylinder (model RC50, stroke 16mm, maximum load 5T), the third bottom surface 307 is the bottom surface of the force transmission block 3, the second top surface 204 is the top surface of the lifting device 2, the second bottom surface 205 is the bottom surface of the lifting device 2, and the first top surface 102 is the top surface of the base 1. It should be noted that the locking block 5 and the locking end 402 of the lifting rod 4 are connected by a threaded rotation. Specifically, the locking block 5 is a nut with internal threads, the lifting rod 4 is rod-shaped, and the locking end 402 of the lifting rod 4 has external threads.

[0034] In this embodiment, as Figure 6 ,like Figure 10 , Figure 11 As shown, the connecting end 401 of the lifting rod 4 and the rod body 403 of the lifting rod 4 are detachably connected, and the end of the rod body 403 facing away from the connecting end 401 is the locking end 402. Figure 6 (The locking end 402, not shown, has an external thread). To accommodate pins 15 of different sizes, the connecting end 401 has several pins, and the connecting end 401 is provided with external threads to connect with the internal threads of the head of the corresponding size pin 15.

[0035] In one embodiment, such as Figure 1 , Figure 3 As shown, the central axis of the first through hole 101 and the central axis of the second through hole 304 are aligned. The central axis of the first through hole 101 is also aligned with the central axis of the lifting rod 4. The first through hole 101 is rectangular, and the second through hole 304 is elongated. The area of ​​the first through hole 101 is larger than the area of ​​the second through hole 304. The alignment of the central axis of the first through hole 101 with the central axis of the second through hole 304, and the alignment of the central axis of the first through hole 101 with the central axis of the lifting rod 4, enables the lifting rod 4 to rise and fall around its own central axis, ensuring the stability of force transmission. By setting the area of ​​the first through hole 101 to be larger than the area of ​​the second through hole 304, the length of the base 1 ( Figure 1 The X-direction (in the middle) is greater than the length of the force transmission block 3 and the width of the base 1. Figure 1 The width of the force transmission block 3 is greater than the width of the Y-direction in the middle, forming along the Y-direction. Figure 1 The structure has a lower cross section in the Z direction that is larger than the upper cross section, ensuring the stability of the structure.

[0036] In one embodiment, such as Figure 1 As shown, there are two lifting devices 2, symmetrically arranged on both sides of the first through hole 101. Each lifting device 2 has an adjusting block 17 between it and the base 1. In this embodiment, as... Figure 1 As shown, the two lifting devices 2 are along the length direction of the base 1 ( Figure 1 The lifting rod 4 is symmetrically arranged in the X direction, positioned between the two lifting devices 2. Simultaneous lifting and lowering via the lifting ends 202 of the two lifting devices 2 ensures stable force application to the lifting rod 4. In this embodiment, as... Figure 1 As shown, the adjusting block 17 is connected to the cylinder 201 of the lifting device 2 and the base 1 by bolts. The adjusting block 17 is used to provide support for the lifting device 2 and avoid damage to the base 1. The top surface of the adjusting block 17 is in contact with the second bottom surface 205 of the lifting device 2, and the bottom surface of the adjusting block 17 is in contact with the first top surface 102 of the base 1.

[0037] In this embodiment, as Figure 2 , Figure 3 As shown, the force transmission block 3 has two force receiving ends. The third bottom surface 307 of one force receiving end abuts against the lifting end 202 of a lifting device 2, so that the block 301 of the force transmission block 3 is subjected to symmetrical lifting force. Then, the force transmission block 3 transmits the force to the locking block 5 and the lifting rod 4, so that the lifting rod 4 is subjected to stable and symmetrical force.

[0038] In this embodiment, as Figure 2 , Figure 3 As shown, a limiting groove 303 is provided on the third bottom surface 307 of the force transmission block 3, and the length of the limiting groove 303 is ( Figure 3 The length of the limiting piece 10 is greater than that of the X direction in the middle. The limiting groove 303 is located between the two force-bearing ends and plays a limiting role.

[0039] In one embodiment, such as Figure 1 , Figure 2 , Figure 4 As shown, it also includes a rotating shaft 7 and two fixing blocks 6. The force transmission block 3 has two spaced support ends 305 on the side away from the lifting device 2 (that is, two support ends 305 are provided on the third top surface 302 of the force transmission block). Each support end 305 has a support half ring 306, which is adapted to the rotating shaft 7. One support half ring 306 corresponds to one fixing block 6. The rotating shaft 7 is accommodated between the fixing block 6 and the support end 305. The fixing block 6 and the support end 305 are connected by fasteners. The connection between the fixing block 6 and the support end 305 serves to fix the rotating shaft 7 and ensure that the rotating shaft 7 will not rotate during the movement of the lifting rod 4.

[0040] In one embodiment, such as Figure 1 , Figure 2 , Figure 4 As shown, the rotating shaft 7 has a through hole 703, through which the lifting rod 4 passes. A gap is left between the lifting rod 4 and the through hole 703. The outer diameter of the rotating shaft 7 is smaller than the length of the second through hole 304. The gap between the lifting rod 4 and the through hole 703 prevents the lifting rod 4 from moving along the through hole 304. Figure 1 When the lifting rod 4 is affected by the positional interference of the rotating shaft 7 in the Z direction, the through hole 703 allows for fine-tuning of the lifting rod 4. In this embodiment, the gap between the lifting rod 4 and the through hole 703 ranges from 0.2 to 5 mm.

[0041] In this embodiment, as Figure 1 , Figure 2 , Figure 4As shown, the rotating shaft 7 has rotating ends 701 at both ends. Each rotating end 701 is inserted into the receiving ring formed by the supporting half-ring 306 and the fixed half-ring of the fixing block 6. The shaft body of the rotating shaft 7 has a supporting surface 702, which abuts against the bottom surface of the locking block 5. The supporting surface 702 provides supporting force to the locking block 5. The lifting force of the lifting device 2 received by the force transmission block 3 is transmitted to the locking block 5 through the supporting surface 702. In this embodiment, as... Figure 2 , Figure 4 As shown, the support surface 702 and the bottom surface of the locking block 5 are in surface contact, which makes the force transmission more stable. It should be noted that after the fixing block 6 and the support half-ring 306 are locked with bolts, the rotating shaft 7 can no longer rotate, so as to ensure the stability of the rotating shaft 7 during the force transmission process and avoid the problem of unstable lifting caused by arbitrary rotation of the rotating shaft 7.

[0042] In one embodiment, such as Figure 1 As shown, it also includes a buffer pad 8. The first bottom surface of the base 1 is provided with a buffer pad 8. By setting the buffer pad 8, rigid collisions between the base 1 and the working surface are avoided.

[0043] In one embodiment, such as Figure 1 As shown, it also includes quick-release screws 9. The base 1 is provided with at least two third through holes, and each third through hole is provided with a quick-release screw 9. The quick-release screws 9 are used to enable quick connection and disassembly between the base 1 and the working surface.

[0044] In this embodiment, the buffer pad 8, as a functional board material combining protection, shock absorption, and cushioning, exhibits performance closely related to its material. Common buffer pad materials are mainly divided into three categories: plastic, rubber, and composite. Among them, plastic buffer pads 8 are the most widely used, with core advantages including wear resistance, corrosion resistance, excellent impact resistance, good toughness and fatigue resistance, and the ability to maintain stable performance even at low temperatures (-50℃), without easily becoming brittle. They are also waterproof and moisture-proof, effectively absorbing material impacts and protecting equipment and products from damage. Rubber buffer pads 8 have excellent elasticity and outstanding shock absorption and noise reduction effects, effectively absorbing high-frequency vibrations and impacts, and exhibiting excellent weather resistance and fatigue resistance. Composite buffer pads 8 are a new type of material that has emerged in recent years, combining the rigidity of the substrate with the flexibility of the buffer material. Their core advantages include a smooth and clean surface, strong bonding that is not easily detached, safety, odorlessness, and recyclability. This embodiment does not specifically limit the material of the buffer pad 8; the choice can be made according to the actual working conditions.

[0045] According to an embodiment of the present invention, in another aspect, a pin-pulling system is also provided, including the aforementioned pin-pulling device for use within a wind turbine tower.

[0046] In one embodiment, such as Figure 1 , Figure 4,like Figure 8 As shown, it also includes a power pump 11, a pressure regulating valve 13, a first pipeline 12, and a second pipeline 14. The first pipeline 12 connects the power pump 11 and the inlet end of the pressure regulating valve 13. The pressure regulating valve 13 has two outlet ends, and a second pipeline 14 is provided between one outlet end of the pressure regulating valve 13 and a lifting device 2. In this embodiment, there are two second pipelines 14, that is, the power pump 11 serves as the power source, and the power is evenly distributed in the pressure regulating valve 13 before reaching the lifting device 2, driving the lifting end 202 of the lifting device 2 to move up and down. Specifically, the power pump 11 is a hydraulic pump, and the lifting device 2 is a lifting hydraulic cylinder.

[0047] In this embodiment, the hydraulic pump is the core power component of the hydraulic system. Its core working principle is based on fluid statics and the principle of volume change. Through the reciprocating or rotating motion of the mechanical structure, the sealed volume inside the pump periodically increases and decreases, thereby realizing the intake, pressurization, and discharge of hydraulic oil. This converts the mechanical energy of the prime mover (such as an electric motor or engine) into the pressure energy of the hydraulic oil, providing a continuous and stable power source for the entire hydraulic system. Hydraulic pumps are mainly divided into three categories according to their structural forms: gear pumps, vane pumps, and piston pumps. Although the specific structures of various pumps differ, the core working principle always revolves around "volume change." This embodiment does not limit the specific structure of the hydraulic pump. The hydraulic pump itself has the advantages of high output pressure, strong power, and high precision, which can apply sufficient force to the pin 15 and ensure precise control of the pin 15 during each upward movement. Furthermore, the hydraulic pump is easy to operate and responds quickly. Through the hydraulic pump's control lifter 2, the starting, stopping, and reversing actions of the actuator can be quickly realized. The action is sensitive and reliable, suitable for automated control, and can be combined with an electrical control system to achieve automatic operation and remote control of the equipment.

[0048] In this embodiment, a hydraulic gauge is also provided on the first pipeline 12, and a quick-release connector is also provided at the interface end 203 of each second pipeline 14 and the jack 2 to realize the quick assembly and disassembly of the second pipeline 14 and the jack 2.

[0049] In this embodiment, to achieve automatic control, a controller is also included. The controller is connected to the power pump 11 and the pressure regulating valve 13 to change the power output of the power pump 11 and the power distribution of the pressure regulating valve 13. Through the cooperation of the power pump 11 and the pressure regulating valve 13, the pressure is controlled so that the maximum load of each lifting device 2 is controlled at 3T and the system tension is controlled at 6T, so as to avoid damage to the components.

[0050] A method of using a pin-pulling device inside a wind turbine tower includes the following steps: (1) First, assemble the device in a confined space (see...) Figure 8 and Figure 9The power pump 11 and the pressure regulating valve 13 work together to distribute the power entering the jacking device 2, and the lifting ends 202 of the two jacking devices 2 extend simultaneously (see...). Figure 12 The lifting end 202 pushes the force transmission block 3 in a direction away from the base 1. Figure 1 The force transmission block 3 moves upward in the Z direction, and the force transmission block 3 transmits the force to the locking block 5 through the support surface 702. The locking block 5 then drives the lifting rod 4 to rise (see...). Figure 12 The lifting rod 4 drives the connected pin 15 to rise to the first distance; (2) The lifting end 202 of the lifting device 2 retracts, and the force transmission block 3 descends under the action of gravity (see Figure 13 The pin 15 is an interference fit (in this embodiment, the pin 15 is used for positioning or fixing) and will not descend due to gravity. After the force transmission block 3 descends a first distance, the locking block 5 rotates relative to the lifting rod 4 (the lifting rod 4 remains stationary) towards the base 1 and descends a first distance (see...). Figure 14 ); (3) Repeat steps (1)-(2) to raise the pin 15 by the second distance, the third distance... the Nth distance (the distance to be raised for the nth time) until "the first distance + the second distance + the third distance + ... + the Nth distance = the length of the pin 15", thereby completely pulling out the pin 15.

[0051] It should be noted that the ideal working condition is the normal working condition (the working surface is parallel to the horizontal plane 16, and the pin shaft 15 is perpendicular to the horizontal plane 16). In this embodiment, the horizontal plane 16 is parallel to the horizontal plane 16. Figure 1 The X and Y axes are parallel. Under unconventional working conditions ( Figure 7 As shown, the working surface has an angle with the horizontal plane 16 and the pin shaft 15 is set perpendicular to the horizontal plane. The base 1 has an angle with the horizontal plane 16. It is necessary to rotate the adjusting shaft 7 so that the central axis of the lifting rod 4 coincides with the central axis of the pin shaft 15. At this time, the support surface 702 has an angle with the base 1. Then, the steps (1)-(3) in the usage method are performed.

[0052] It should be noted that, in this embodiment, as Figure 12 , Figure 13 , Figure 14 As shown, during the upward movement of the lifting rod 4, it avoids other structures inside the fan within the confined space. That is, the lifting rod 4 will not interfere with the position of other structures inside the fan, thus ensuring its smooth lifting. Throughout the entire movement, only the lifting rod 4 undergoes a long-distance movement; other structures do not, facilitating movement within confined spaces.

[0053] This invention provides a pin-pulling device, a pin-pulling system, and a method of use for use in wind turbine towers, which has the following advantages: (1) The lifting rod 4 passes through the first through hole 101 and is suitable for connecting with the exposed pin 15 on the working surface. The lifting device 2 pushes the force transmission block 3 to rise relative to the base 1. The force transmission block 3 drives the locking block 5 and the lifting rod 4 to rise. After rising to the first distance, the lifting device 2 retracts, the force transmission block 3 descends under the action of gravity, and the locking block 5 rotates relative to the lifting rod 4 toward the base 1 a first distance, so that the pin 15 rises a first distance; the lifting device 2 repeatedly raises and lowers the pin. The movement accumulates several distances to pull out the pin 15. Based on the repeated lifting and lowering movement of the lifting device 2, the lifting device 2 achieves lifting and lowering in a narrow space without long-distance movement. The entire device, except for the lifting rod 4 (which will not interfere with the position of other structures in the wind tower during the lifting process), will not have long-distance movement, which meets the operation requirements in a narrow space and is convenient for on-site operation; (2) The limiting plate 10 is set in the space formed by the first top surface 102 of the base 1 and the third bottom surface 307 of the force transmission block 3. As the lifting rod 4 moves along Figure 1 The limit plate 10 moves along the lifting rod 4 in the Z direction, which helps the operator observe the movement distance of the lifting rod 4 and thus understand the pull-out distance of the pin 15; (3) Each connecting end 401 is inserted into the receiving ring formed by the supporting half ring 306 and the fixed half ring of the fixing block 6. The shaft of the rotating shaft 7 is provided with a supporting surface 702. The supporting surface 702 abuts against the bottom surface of the locking block 5. The supporting surface 702 provides support force for the locking block 5. The lifting force of the lifting device 2 received by the force transmission block 3 is transmitted to the locking block 5 through the supporting surface 702; (4) Under non-standard working conditions ( Figure 7 As shown, the working surface has an angle with the horizontal plane 16, and the pin shaft 15 is set perpendicular to the horizontal plane. The base 1 has an angle with the horizontal plane 16. It is necessary to rotate the adjusting shaft 7 to make the central axis of the lifting rod 4 coincide with the central axis of the pin shaft 15. At this time, there is an angle between the support surface 702 and the base 1. Then, the steps (1)-(3) in the usage method are performed, and the purpose of pulling out the pin shaft 15 can still be achieved. (5) The lifting rod 4 will not interfere with the position of other structures inside the fan structure, so as to achieve the smooth lifting of the lifting rod 4. During the entire movement, only the lifting rod 4 will move a long distance, and other structures will not move a long distance, which is convenient for movement in a narrow space and meets the usage requirements.

[0054] As an alternative implementation, the power pump 11 in this embodiment can also be a pneumatic pump.

[0055] As an alternative implementation, the power pump 11, pressure regulating valve 13 and other structures may be omitted, and the jacking device 2 may be an electric telescopic pump.

[0056] As an alternative implementation method, such as Figure 7As shown, the lifting rod 4 is an integrated unit, and the rod body 403 of the lifting rod 4 is provided with external threads to connect with the locking block 5 and the pin 15 respectively.

[0057] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A pin-pulling device for use inside a wind turbine tower, characterized in that, include: The base (1) is provided with a first through hole (101), and the first bottom surface of the base (1) is adapted to fit against the working surface; Lifter (2), the lifter (2) is in contact with the base (1), and the second bottom surface (205) of the lifter (2) is fitted with the first top surface (102) of the base (1); The force transmission block (3) has its third bottom surface (307) fitted to the second top surface (204) of the lifting device (2), and the force transmission block (3) has a second through hole (304). A lifting rod (4) is provided, which passes through the first through hole (101) and the second through hole (304). The connecting end (401) of the lifting rod (4) passing through the first through hole (101) is adapted to be connected to the pin (15) exposed on the working surface. Locking block (5), the locking block (5) is located on the side of the force transmission block (3) away from the lifting device (2), and the locking block (5) is rotatably connected to the locking end (402) of the lifting rod (4) away from the connecting end (401); The lifting rod (4) passes through the first through hole (101) and is suitable for connecting with the exposed pin (15) on the working surface. The lifting device (2) pushes the force transmission block (3) to rise relative to the base (1). The force transmission block (3) drives the locking block (5) and the lifting rod (4) to rise. After rising to the first distance, the lifting device (2) retracts. The force transmission block (3) descends under the action of gravity. The locking block (5) rotates relative to the lifting rod (4) towards the base (1) a first distance, so that the pin (15) rises a first distance. Repeat the above process, and use the lifting device (2) to repeatedly raise and lower the lifting rod (4) several times to accumulate the distance, so as to pull out the pin (15).

2. The pin-pulling device for use inside a wind turbine tower according to claim 1, characterized in that, The central axis of the first through hole (101) and the central axis of the second through hole (304) are set to coincide. The central axis of the first through hole (101) is set to coincide with the central axis of the lifting rod (4). The first through hole (101) is rectangular and the second through hole (304) is elongated. The area of ​​the first through hole (101) is larger than the area of ​​the second through hole (304).

3. The pin-pulling device for use inside a wind turbine tower according to claim 1, characterized in that, There are two lifting devices (2), which are symmetrically arranged on both sides of the first through hole (101). Each lifting device (2) is provided with an adjustment block (17) between it and the base (1).

4. The pin-pulling device for use inside a wind turbine tower according to claim 2, characterized in that, It also includes a rotating shaft (7) and two fixed blocks (6). The force transmission block (3) has two spaced support ends (305) on the side away from the lifting device (2). Each support end (305) has a support half ring (306). The support half ring (306) is adapted to the rotating shaft (7). One support half ring (306) corresponds to one fixed block (6). The rotating shaft (7) is accommodated between the fixed block (6) and the support end (305). The fixed block (6) and the support end (305) are connected by fasteners.

5. The pin-pulling device for use inside a wind turbine tower according to claim 4, characterized in that, The rotating shaft (7) is provided with a through hole (703), the lifting rod (4) is provided through the through hole (703), and there is a gap between the lifting rod (4) and the through hole (703). The outer diameter of the rotating shaft (7) is smaller than the length of the second through hole (304).

6. The pin-pulling device for use inside a wind turbine tower according to claim 1, characterized in that, It also includes a cushioning pad (8), which is provided on the first bottom surface of the base (1).

7. The pin-pulling device for use inside a wind turbine tower according to claim 1, characterized in that, It also includes quick-release screws (9), and the base (1) is provided with at least two third through holes, and each of the third through holes is provided with a quick-release screw (9).

8. A pin-pulling system, characterized in that, Includes the pin-pulling device for use in wind turbine towers as described in any one of claims 1-7.

9. The pin-pulling system according to claim 8, characterized in that, It also includes a power pump (11), a pressure regulating valve (13), a first pipeline (12) and a second pipeline (14). The first pipeline (12) connects the power pump (11) and the inlet end of the pressure regulating valve (13). The pressure regulating valve (13) has two outlet ends. A second pipeline (14) is provided between one outlet end of the pressure regulating valve (13) and one of the lifting devices (2).

10. A method of using a pin-pulling device for use in a wind turbine tower, comprising using the pin-pulling device for use in a wind turbine tower as described in claim 1, characterized in that, The lifting rod (4) passes through the first through hole (101) and is suitable for connecting with the exposed pin (15) on the working surface. The lifting device (2) pushes the force transmission block (3) to rise relative to the base (1). The force transmission block (3) drives the locking block (5) and the lifting rod (4) to rise. After rising to the first distance, the lifting device (2) retracts. The force transmission block (3) descends under the action of gravity. The locking block (5) rotates relative to the lifting rod (4) towards the base (1) a first distance, so that the pin (15) rises a first distance. Repeat the above process, and use the lifting device (2) to repeatedly raise and lower the lifting rod (4) several times to accumulate the distance until the accumulated distance is equal to the length of the pin (15) so that the pin (15) can be pulled out.

Images