A cover plate structure for a wind turbine tower

Abstract

The present application belongs to the field of wind power generation technology, and particularly relates to a cover plate structure for a wind turbine tower, comprising a wind turbine tower, a manhole is formed in the wind turbine tower, and a cover plate sealing door is installed on the manhole through a load-bearing hinge; four groups of locking mechanisms are provided, the four groups of locking mechanisms are annularly distributed around the manhole, and are used for locking and positioning the cover plate sealing door; a driving mechanism is bearing assembled at the center position of the cover plate sealing door, and is used for controlling the operation of the locking mechanism; and a limiting mechanism is provided on the driving mechanism, and is used for one-way locking and positioning the driving mechanism. The present application can form a multi-point synchronous locking effect by using the annularly and uniformly arranged multi-lock rod structure, so that the circumferential stress of the cover plate is more uniform, and the overall structural strength and anti-vibration stability after the cover plate is closed are significantly improved.

Description

Technical Field

[0001] This invention belongs to the field of wind power generation technology, and in particular relates to a cover plate structure for wind turbine towers. Background Technology

[0002] The wind turbine tower is a key supporting component of the wind turbine generator set, primarily responsible for transmitting loads and absorbing vibrations from the upper part of the unit. To facilitate the installation, commissioning, daily operation and maintenance, and access for personnel during maintenance, manholes are installed on the side walls or internal maintenance platforms of the tower, along with corresponding cover structures. These covers are used to seal the manhole openings when not in use, preventing external wind, sand, rain, snow, and dust from entering the tower, while also preventing accidental falls of personnel or tools. They are crucial components for ensuring the safe operation of equipment inside the tower and for protecting workers at heights.

[0003] Existing wind turbine tower manhole covers generally employ single-point locking, single-sided pins, or a small number of bolts for fastening. The locking points are concentrated, resulting in poor uniformity of circumferential stress on the cover. After prolonged exposure to wind turbine vibration and strong external wind pressure, problems such as localized warping at the cover edges and widening of sealing gaps easily occur, leading to insufficient overall closure strength and structural stability. Furthermore, most locking mechanisms lack anti-accidental opening mechanisms. Under conditions of continuous tower vibration or accidental contact by maintenance personnel, the locking components are prone to spontaneous loosening, causing the cover to open unexpectedly. Therefore, there is an urgent need to improve the existing wind turbine tower cover structure and provide a new cover structure for wind turbine towers. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a wind turbine tower cover structure that is reasonably designed, simple in structure, has higher closure strength, and has an anti-accidental opening function, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A cover plate structure for a wind turbine tower, comprising:

[0007] A wind turbine tower, wherein a manhole is provided on the wind turbine tower, and a cover plate is installed on the manhole via a load-bearing hinge to seal the door;

[0008] The locking mechanism comprises four sets, which are arranged in a ring around the manhole to lock and limit the cover plate sealing.

[0009] A drive mechanism, wherein the drive mechanism bearing is mounted at the center position of the cover plate sealing door, and the drive mechanism is used to control the operation of the locking mechanism;

[0010] A limiting mechanism is provided on the driving mechanism and is used to lock and limit the driving mechanism in one direction.

[0011] In a preferred embodiment, the cover plate and the manhole form a sealing structure, and a sealing gasket is embedded in the outer edge of the cover plate near the manhole. The sealing gasket is made of corrosion-resistant and wear-resistant rubber.

[0012] In a preferred embodiment, the drive mechanism includes a drive shaft, an annular handle, and a drive wheel. The drive shaft bearing is installed at the center of the cover plate sealing the door. The annular handle is fixed to the end of the drive shaft located outside the manhole, and the drive wheel is fixed to the end of the drive shaft located inside the manhole.

[0013] In a preferred embodiment, the four sets of locking mechanisms are linked together by the drive mechanism.

[0014] In a preferred embodiment, the locking mechanism includes a pull rod, a positioning frame, and a locking rod. The positioning frame is fixed to the side of the cover plate near the manhole. The positioning frame has a U-shaped cross-section, and a locking rod is slidably provided in the middle of its inner side. The two ends of the pull rod are respectively hinged to the locking rod and the drive wheel.

[0015] In a preferred embodiment, the inner side of the positioning frame is symmetrically fixed with fixed shafts, and auxiliary wheels are mounted on the outer sides of the two fixed shafts with bearings. The auxiliary wheels are located on both sides of the locking rod and are in contact with the locking rod.

[0016] In a preferred embodiment, grooves are provided on both sides of the locking rod, and the inner wall of the groove is arc-shaped and matches the outer contour of the auxiliary wheel.

[0017] In a preferred embodiment, the inner wall of the manhole is provided with a docking groove corresponding to each of the multiple locking rods. One end of each locking rod is engaged and positioned in the docking groove, and the interface between the locking rod and the docking groove is provided with a bevel.

[0018] In a preferred embodiment, the limiting mechanism includes ratchet teeth, a lock cylinder, and a pawl. The ratchet teeth are evenly distributed in a ring around the periphery of the drive wheel. The lock cylinder is installed on the cover plate sealing the door. A pawl is fixedly installed on the main body of the lock cylinder, and one end of the pawl engages with the ratchet teeth.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] In the solution of the present invention:

[0021] The ring handle drives the drive shaft and drive wheel to rotate. The pull rod controls the multiple ring-distributed locking rods to slide outward synchronously, so that the ends of the locking rods are engaged in the mating grooves on the inner wall of the manhole. With the help of the inclined structure of the mating surface between the locking rod and the mating groove, the locking rod can apply an axial compressive force towards the manhole side to the cover plate during the insertion process. With the help of the sealing gasket, a tight seal can be achieved between the manhole and the cover plate. At the same time, the ring-distributed multiple locking rod structure can form a multi-point synchronous locking effect, making the circumferential force on the cover plate more uniform, and significantly improving the overall structural strength and vibration resistance stability after the cover plate is closed.

[0022] Each locking bar has an auxiliary wheel on both sides, and a guide groove that matches the contour of the auxiliary wheel is opened on the outer wall of the locking bar. This allows the auxiliary wheel to fully fit and contact the outer wall of the locking bar, effectively improving the smoothness of the movement during the sliding and telescopic process of the locking bar, and greatly reducing the friction and wear between components. This not only extends the overall service life of the structure, but also reduces the operating resistance of the locking bar movement, achieving the effect of labor-saving operation.

[0023] When the cover is in the closed and locked state, the pawl and ratchet work together to circumferentially limit the drive wheel, drive shaft and ring handle, effectively preventing the drive wheel from turning loose due to accidental external force, and achieving a reliable anti-accidental opening locking function. When the cover needs to be opened, simply insert the matching key into the lock cylinder, and the lock cylinder will drive the pawl to rotate so that it disengages from the ratchet, which can quickly release the limit constraint on the drive mechanism, making the unlocking operation convenient and controllable. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings are described as follows:

[0025] Figure 1 This is a three-dimensional front view schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the drive wheel and tie rod of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the fixed shaft and auxiliary wheel of the present invention;

[0028] Figure 4 This is a schematic diagram of the auxiliary wheel and locking rod of the present invention;

[0029] Figure 5 This is a schematic diagram of the wind turbine tower and manhole of the present invention;

[0030] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle.

[0031] In the picture:

[0032] 1. Wind turbine tower; 2. Manhole; 3. Load-bearing hinge; 4. Cover plate; 5. Drive shaft; 6. Ring handle; 7. Drive wheel; 8. Tie rod; 9. Positioning frame; 10. Fixed shaft; 11. Auxiliary wheel; 12. Locking rod; 13. Groove; 14. Connecting groove; 15. Inclined surface; 16. Racket; 17. Lock cylinder; 18. Pawl; 19. Sealing gasket. Detailed Implementation

[0033] The embodiments described below are merely some embodiments of the present invention and do not represent all embodiments consistent with the present invention. Exemplary embodiments will now be described with reference to the accompanying drawings:

[0034] like Figure 1-6 As shown, the present invention provides a cover plate structure for wind turbine towers, comprising:

[0035] Wind turbine tower 1, with manhole 2 on wind turbine tower 1, and a cover plate 4 installed on manhole 2 via load-bearing hinge 3;

[0036] The locking mechanism consists of four sets, which are arranged in a ring around the manhole 2 to lock and limit the cover plate sealing door 4.

[0037] The drive mechanism, with its bearings mounted at the center of the cover plate sealing door 4, is used to control the operation of the locking mechanism.

[0038] The limit mechanism is located on the drive mechanism and is used to lock and limit the drive mechanism in one direction.

[0039] Based on the above structure, the cover plate sealing door 4 and the manhole 2 form a sealing structure. A sealing gasket 19 is embedded in the outer edge of the cover plate sealing door 4 near the manhole 2. The sealing gasket 19 is made of corrosion-resistant and wear-resistant rubber.

[0040] In this embodiment, the sealing gasket 19 can improve the sealing effect between the cover plate sealing door 4 and the manhole 2.

[0041] Based on the above structure, the drive mechanism includes a drive shaft 5, a ring handle 6, and a drive wheel 7. The drive shaft 5 is bearing-mounted at the center of the cover plate sealing door 4. The ring handle 6 is fixed to the end of the drive shaft 5 located outside the manhole 2. The drive wheel 7 is fixed to the end of the drive shaft 5 located inside the manhole 2.

[0042] Based on the above structure, the four locking mechanisms are linked together through the drive mechanism.

[0043] In this embodiment, the drive mechanism facilitates the synchronous operation of multiple locking mechanisms, making the operation simpler and more convenient.

[0044] Based on the above structure, the locking mechanism includes a pull rod 8, a positioning frame 9 and a locking rod 12. The positioning frame 9 is fixed to the side of the cover plate sealing door 4 near the manhole 2. The cross-section of the positioning frame 9 is U-shaped, and the locking rod 12 is slidably provided in the middle of its inner side. The two ends of the pull rod 8 are respectively hinged to the locking rod 12 and the drive wheel 7.

[0045] In this embodiment, when the drive wheel 7 is rotated, the pull rod 8 is used to control the sliding of the locking rod 12, which facilitates the opening and closing of the cover door 4.

[0046] Based on the above structure, the inner side of the positioning frame 9 is symmetrically fixed with fixed shafts 10, and the outer sides of the two fixed shafts 10 are each equipped with auxiliary wheels 11. The auxiliary wheels 11 are located on both sides of the locking rod 12 and are in contact with the locking rod 12.

[0047] Based on the above structure, grooves 13 are provided on both sides of the locking rod 12. The inner wall of the groove 13 is arc-shaped and matches the outer contour of the auxiliary wheel 11.

[0048] In this embodiment, the auxiliary wheel 11 can effectively improve the smoothness of movement during the sliding extension and retraction of the locking rod 12, significantly reduce friction and wear between components, and also reduce the operating resistance of the locking rod 12, thus achieving the effect of effortless operation.

[0049] Based on the above structure, the inner wall of the manhole 2 is provided with a docking groove 14 corresponding to a plurality of locking rods 12. One end of the locking rod 12 is engaged and positioned in the docking groove 14. The interface between the locking rod 12 and the docking groove 14 is provided with a slope 15.

[0050] In this embodiment, by means of the inclined surface 15 structure of the mating surface of the locking rod 12 and the mating groove 14, the locking rod 12 can apply an axial compressive force toward the manhole 2 side to the cover plate sealing door 4 during the insertion process, and with the sealing gasket 19, a tight seal between the manhole 2 and the cover plate sealing door 4 can be achieved.

[0051] Based on the above structure, the limiting mechanism includes ratchet 16, lock cylinder 17 and pawl 18. The ratchet 16 is evenly distributed in a ring around the drive wheel 7. The lock cylinder 17 is installed on the cover plate sealing door 4. The pawl 18 is fixedly installed on the main body of the lock cylinder 17. One end of the pawl 18 engages with the ratchet 16.

[0052] In this embodiment, the pawl 18 and ratchet 16 work together to circumferentially limit the drive wheel 7, drive shaft 5 and ring handle 6, effectively preventing the drive wheel 7 from rotating and loosening due to accidental contact with external force.

[0053] The working principle of this invention is as follows:

[0054] In use, the operator first inserts the matching key into the lock cylinder 17 to unlock it, and controls the pawl 18 to rotate and disengage from the ratchet 16. Then, by rotating the ring handle 6, the drive shaft 5 and drive wheel 7 rotate synchronously. Multiple pull rods 8 pull the lock rod 12, which is distributed in a ring, to slide outward synchronously, so that the end of the lock rod 12 is inserted into the docking groove 14 on the inner wall of the manhole 2. With the cooperation of the lock rod 12 and the inclined surface 15 of the docking groove 14, an axial pressing force can be generated on the cover plate 4 during the insertion process. With the cooperation of the sealing gasket 19, the manhole 2 is tightly sealed. Moreover, the ring multi-point locking makes the cover plate 4 evenly stressed, effectively improving the closing strength and stability. The auxiliary wheels 11 on both sides of the lock rod 12 roll with the groove 13 on its outer wall, which can reduce the sliding friction resistance, ensure the smooth extension and retraction of the lock rod 12, and make the opening and closing operation more effortless.

[0055] After the cover plate seals the door 4 and locks it, the control lock cylinder 17 drives the pawl 18 to reset, so that the pawl 18 engages with the ratchet 16 on the outer edge of the drive wheel 7, thereby forming a circumferential limit on the drive wheel 7, drive shaft 5 and ring handle 6, which can resist external interference such as vibration and accidental contact, prevent the lock rod 12 from loosening, and achieve a reliable anti-accidental opening effect.

[0056] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any equivalent changes, modifications, substitutions, and variations made by those skilled in the art based on the concept of the present invention and on the basis of the prior art through logical analysis, reasoning, or limited experiments shall be within the scope of protection defined by the claims.

Claims

1. A cover plate structure for a wind turbine tower, characterized in that, include: A wind turbine tower (1) has a manhole (2) on it, and a cover plate (4) is installed on the manhole (2) by a load-bearing hinge (3). The locking mechanism consists of four sets, which are arranged in a ring around the manhole (2) to lock and limit the cover plate sealing door (4). The drive mechanism is mounted on the center of the cover plate sealing door (4) with a bearing, and the drive mechanism is used to control the operation of the locking mechanism; A limiting mechanism is provided on the driving mechanism and is used to lock and limit the driving mechanism in one direction.

2. The cover plate structure for a wind turbine tower according to claim 1, characterized in that: The cover plate sealing door (4) and the manhole (2) form a sealing structure. A sealing gasket (19) is embedded in the outer edge of the cover plate sealing door (4) near the manhole (2). The sealing gasket (19) is made of corrosion-resistant and wear-resistant rubber.

3. The cover plate structure for a wind turbine tower according to claim 1, characterized in that: The drive mechanism includes a drive shaft (5), a ring handle (6) and a drive wheel (7). The drive shaft (5) is mounted on the center of the cover plate sealing door (4). The ring handle (6) is fixed to one end of the drive shaft (5) outside the manhole (2). The drive wheel (7) is fixed to one end of the drive shaft (5) inside the manhole (2).

4. A cover plate structure for a wind turbine tower according to claim 3, characterized in that: The four locking mechanisms are linked together by the driving mechanism.

5. A cover plate structure for a wind turbine tower according to claim 4, characterized in that: The locking mechanism includes a pull rod (8), a positioning frame (9) and a locking rod (12). The positioning frame (9) is fixed to the side of the cover plate sealing door (4) near the manhole (2). The positioning frame (9) has a "U" shaped cross section, and the locking rod (12) is slidably provided in the middle of its inner side. The two ends of the pull rod (8) are respectively hinged to the locking rod (12) and the drive wheel (7).

6. A cover plate structure for a wind turbine tower according to claim 5, characterized in that: The positioning frame (9) has a fixed shaft (10) fixed symmetrically on its inner side. The two fixed shafts (10) are equipped with auxiliary wheels (11) on their outer sides. The auxiliary wheels (11) are located on both sides of the locking rod (12) and are in contact with the locking rod (12).

7. A cover plate structure for a wind turbine tower according to claim 6, characterized in that: The locking rod (12) has grooves (13) on both sides. The inner wall of the groove (13) is arc-shaped and matches the outer contour of the auxiliary wheel (11).

8. A cover plate structure for a wind turbine tower according to claim 7, characterized in that: The inner wall of the manhole (2) is provided with a docking groove (14) corresponding to each of the locking rods (12). One end of the locking rod (12) is engaged and positioned in the docking groove (14). The interface between the locking rod (12) and the docking groove (14) is provided with a slope (15).

9. A cover plate structure for a wind turbine tower according to claim 8, characterized in that: The limiting mechanism includes ratchet (16), lock cylinder (17) and pawl (18). The ratchet (16) is evenly distributed in a ring around the drive wheel (7). The lock cylinder (17) is installed on the cover plate sealing door (4). The pawl (18) is fixedly installed on the main body of the lock cylinder (17). One end of the pawl (18) engages with the ratchet (16).

Images