Wind turbine blade tip clamping device for preventing gripper loosening

Abstract

The present invention belongs to the technical field of clamping devices, and relates to a clamping device for the tip of a wind turbine blade to prevent the clamping jaws from loosening. The clamping device includes a base, two fixed clamping jaws fixedly connected to the base, and two moving clamping jaws rotatably arranged on the base. The moving clamping jaws are fixed to their rotating shafts, and swing blocks are arranged on the rotating shafts. A connecting plate is arranged on the base at a position below the fixed clamping jaws. A pair of diagonal tension members are arranged in parallel between the connecting plate and the middle parts of the moving clamping jaws. A tightening assembly is arranged between the connecting plate and the free ends of the swing blocks. The tightening assembly includes a bolt, a threaded block, and two connecting rods. The bolt passes through the connecting plate and is threadedly connected to the threaded block. The head of the bolt is located outside the connecting plate. The two connecting rods are respectively hinged to the two sides of the threaded block and the swing block. The present invention can not only use the diagonal tension members to clamp the moving clamping jaws towards the fixed clamping jaws, but also further fix the rotation angle of the moving clamping jaws through the tightening assembly, avoiding the risk of the tip of the blade falling due to the loosening of the moving clamping jaws during transportation.

Description

Technical Field

[0001] The invention relates to the technical field of clamping devices, and in particular to a wind turbine blade tip clamping device capable of preventing a clamping claw from loosening. Background Art

[0002] Wind turbines convert the kinetic energy of wind into rotational mechanical energy, thereby driving wind turbines to generate electricity. The main component that transmits wind power is the wind turbine blade. Wind turbine blades are flexible blades, and their size is related to the power generation of wind turbines. In order to obtain higher power, some wind turbine blades need to be as long as 75 meters and weigh up to 50 tons. In addition, wind turbine blades have irregular arcs, are brittle, soft, and easily damaged, which puts high demands on storage racks.

[0003] Because wind turbine blades are large in size, they generally need to rely on special clamping devices for storage and transportation. The clamping device is equipped with two pairs of claws to clamp the tip of the wind turbine blade. Because wind turbine blades are heavy, even a slight shake during transportation will generate a large force, and even cause the claws to expand and cause the blade tip to fall. Therefore, it is necessary to improve the stability of the claws to avoid risks.

[0004] Therefore, it is necessary to provide a clamping device structure to ensure the safety of wind turbine blades. Summary of the invention

[0005] The main purpose of the present invention is to provide a wind turbine blade tip clamping device which prevents the clamping claws from loosening, so that the wind turbine blade tip clamping device can be fixed more firmly.

[0006] The present invention achieves the above-mentioned purpose through the following technical scheme: a wind turbine blade tip clamping device for preventing the clamping jaw from loosening, comprising a base, a fixed clamping jaw fixedly connected to the base, and a movable clamping jaw rotatably arranged on the base, the base is provided with a connecting plate at a position below the fixed clamping jaw, a pair of inclined pull components are provided in parallel between the connecting plate and the middle part of the movable clamping jaw, the movable clamping jaw is fixed to its rotating shaft, a pendulum block is provided on the rotating shaft, a fastening assembly is provided between the connecting plate and the free end of the pendulum block, the fastening assembly comprises a bolt, a threaded block and two connecting rods, the bolt passes through the connecting plate and is threadedly connected to the threaded block, and the two connecting rods are respectively hinged to the two sides of the threaded block and the pendulum block.

[0007] Specifically, a fixing plate facing the connecting plate is provided on the base, the other end of the bolt passes through the fixing plate, and the end of the bolt is matched with a nut located on the inner side of the fixing plate.

[0008] Specifically, the connecting rod includes a bent connecting rod hinged to the threaded block and a straight connecting rod hinged to the pendulum block, and the free end of the bent connecting rod is hinged to the free end of the straight connecting rod.

[0009] Specifically, an arc-shaped supporting block is provided on the base.

[0010] Specifically, arc-shaped clamping blocks are rotatably connected to both the fixed clamping jaw and the movable clamping jaw. Stopping blocks for limiting the angles of the arc-shaped clamping blocks are provided on the outer sides of the fixed clamping jaw and the movable clamping jaw, and soft pads are provided on the concave surfaces of the arc-shaped clamping blocks.

[0011] Furthermore, fixing parts for fixing the stopping blocks are provided on both the fixed clamping jaw and the movable clamping jaw. At least two waist-shaped holes are arranged in parallel on the stopping blocks, and the stopping blocks are fixed to the fixing parts by screws passing through the waist-shaped holes.

[0012] The beneficial effects of adopting the above technical solutions are as follows:

[0013] The present invention can not only use the stay cable component to clamp the movable clamping jaw towards the fixed clamping jaw, but also further fix the rotation angle of the movable clamping jaw through the locking component, avoiding the risk of the blade tip falling due to the loosening of the movable clamping jaw during transportation. Description of the Drawings

[0014] Figure 1 is a perspective view of the blade tip clamping device for a wind turbine blade in the embodiment;

[0015] Figure 2 is Figure 1 a partial enlarged view at position A in ;

[0016] Figure 3 is a partial schematic view of the locking component.

[0017] The numbers in the figures represent:

[0018] 1 - base, 11 - connecting plate, 12 - fixing plate, 13 - arc-shaped supporting block;

[0019] 2 - fixed clamping jaw, 21 - fixing part;

[0020] 3 - movable clamping jaw, 31 - rotating shaft, 32 - swing block;

[0021] 4 - stay cable component;

[0022] 5 - locking component, 51 - bolt, 52 - threaded block, 53 - connecting rod, 531 - bent connecting rod, 532 - straight connecting rod, 54 - nut;

[0023] 6 - arc-shaped clamping block, 61 - soft pad;

[0024] 7 - stopping block, 71 - waist-shaped hole;

[0025] 8 - screw. Detailed Embodiments

[0026] The present invention will be further described in detail below in conjunction with specific embodiments.

[0027] Embodiment:

[0028] As Figure 1 and Figure 3 shown, a clamping device for the tip of a wind turbine blade to prevent the clamping jaws from loosening according to the present invention includes a base 1, two fixed clamping jaws 2 fixedly connected to the base 1, and two moving clamping jaws 3 rotatably arranged on the base 1. A connecting plate 11 is provided at a position of the base 1 below the fixed clamping jaws 2. A pair of diagonal tension members 4 are arranged in parallel between the connecting plate 11 and the middle of the moving clamping jaws 3. The moving clamping jaws 3 are fixed to their rotating shafts 31. A swing block 32 is provided on the rotating shaft 31. A fastening assembly 5 is provided between the free end of the connecting plate 11 and the swing block 32. The fastening assembly 5 includes a bolt 51, a threaded block 52, and two connecting rods 53. The bolt 51 passes through the connecting plate 11 and is threadedly connected to the threaded block 52. The two connecting rods 53 are respectively hinged to both sides of the threaded block 52 and the swing block 32. The diagonal tension members 4 are used to clamp the moving clamping jaws 3 towards the fixed clamping jaws 2. After clamping, the swing block 32 swings, driving the threaded block 52 to move towards the connecting plate 11, and the bolt 51 loosens. At this time, the worker tightens the bolt 51 so that the head of the bolt 51 abuts against the connecting plate 11 again. Unless the bolt 51 is actively loosened, the swing block 32 cannot swing anymore, and the rotation angle of the position of the moving clamping jaws 3 is further fixed, avoiding the risk of the tip of the blade falling due to the loosening of the moving clamping jaws 3 during transportation.

[0029] As Figure 3 shown, a fixing plate 12 facing the connecting plate 11 is provided on the base 1. The other end of the bolt 51 passes through the fixing plate 12, and a nut 54 is provided at the end of the bolt 51 inside the fixing plate 12. The nut 54 should allow the moving clamping jaws 3 to open to the maximum position, avoiding the gravity component acting completely on the bolt 51, so that even if the bolt 51 is loose, it will not deflect too far, facilitating tightening.

[0030] Specifically, the connecting rod 53 includes a bent connecting rod 531 hinged to the threaded block 52 and a straight connecting rod 532 hinged to the swing block 32. The free end of the bent connecting rod 531 is hinged to the free end of the straight connecting rod 532. The hinge axis of the threaded block 52 is parallel to the hinge axis of the swing block 32, but the width of the threaded block 52 is larger than the thickness of the swing block 32. Therefore, the bent connecting rod 531 is needed to compensate for the offset and give the connecting rod 53 better freedom of movement.

[0031] As Figure 1 shown, an arc-shaped supporting block 13 is provided on the base 1. The arc-shaped supporting block 13 can support the lower part of the tip of the wind turbine blade before clamping.

[0032] As Figure 1As shown in the figure, arc-shaped clamping blocks 6 are rotatably connected to both the fixed clamping jaw 2 and the movable clamping jaw 3. Stop blocks 7 for restricting the angles of the arc-shaped clamping blocks 6 are provided on the outer sides of the fixed clamping jaw 2 and the movable clamping jaw 3. A soft pad 61 is provided on the concave surface of the arc-shaped clamping block 6. The soft pad 61 enables the fixed clamping jaw 2 and the movable clamping jaw 3 to make flexible contact with the wind power blade. The stop block 7 can keep the arc-shaped clamping block 6 in a proper open state, facilitating the insertion of the wind power blade.

[0033] As Figure 1 and Figure 2 shown in the figure, the fixed clamping jaw 2 is provided with a fixing portion 21 for fixing the stop block 7. At least two oblong holes 71 are arranged in parallel on the stop block 7. The stop block 7 is fixed to the fixing portion 21 by screws 8 passing through the oblong holes 71. In this way, the opening angle of the arc-shaped clamping block 6 can be adjusted. The movable clamping jaw 3 has the same structure and will not be described in detail.

[0034] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention.

Claims

1. A tip clamping device for a wind turbine blade to prevent the clamping jaws from loosening, comprising a base, two fixed clamping jaws fixedly connected to the base, and two moving clamping jaws rotatably arranged on the base. A connecting plate is provided at a position of the base below the fixed clamping jaws. A pair of diagonal tension members are arranged in parallel between the connecting plate and the middle parts of the moving clamping jaws. Characterized in that: The moving clamping jaw is fixed to its rotating shaft, and a swing block is arranged on the rotating shaft. A fastening assembly is arranged between the connecting plate and the free end of the swing block. The fastening assembly includes a bolt, a threaded block, and two connecting rods. The bolt passes through the connecting plate and is threadedly connected to the threaded block. The two connecting rods are respectively hinged to both sides of the threaded block and the swing block.

2. The tip clamping device for a wind turbine blade to prevent the clamping jaws from loosening according to claim 1, Characterized in that: A fixing plate facing the connecting plate is arranged on the base. The other end of the bolt passes through the fixing plate, and a nut is arranged at the end of the bolt inside the fixing plate.

3. The tip clamping device for a wind turbine blade to prevent the clamping jaws from loosening according to claim 1, Characterized in that: The connecting rod includes a bent connecting rod hinged to the threaded block and a straight connecting rod hinged to the swing block. The free end of the bent connecting rod is hinged to the free end of the straight connecting rod.

4. The tip clamping device for a wind turbine blade to prevent the clamping jaws from loosening according to claim 1, Characterized in that: An arc-shaped supporting block is arranged on the base.

5. The tip clamping device for a wind turbine blade to prevent the clamping jaws from loosening according to claim 1, Characterized in that: Arc-shaped clamping blocks are rotatably connected to both the fixed clamping jaw and the moving clamping jaw. Stopping blocks for limiting the angles of the arc-shaped clamping blocks are arranged on the outer sides of both the fixed clamping jaw and the moving clamping jaw. Soft pads are arranged on the concave surfaces of the arc-shaped clamping blocks.

6. The tip clamping device for a wind turbine blade to prevent the clamping jaws from loosening according to claim 5, Characterized in that: Fixing parts for fixing the stopping blocks are arranged on both the fixed clamping jaw and the moving clamping jaw. At least two waist-shaped holes are arranged in parallel on the stopping block. The stopping block is fixed to the fixing part by screws passing through the waist-shaped holes.

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