A wind turbine blade mold turning device and system

Abstract

The present invention discloses a wind turbine blade mold flipping device and system, belonging to the technical field of wind turbine blade production equipment, comprising a first connecting rod, a second connecting rod, a lower flip arm, an upper flip arm, and a telescopic cylinder, wherein the upper flip arm is hinged to the lower flip arm, and the second connecting rod is provided with three hinge positions, the three hinge positions of the second connecting rod being hinged to the top of the lower flip arm, one end of the first connecting rod, and the telescopic rod of the telescopic cylinder, respectively, the cylinder body of the telescopic cylinder being hinged to the bottom of the lower flip arm, and the other end of the first connecting rod being hinged to the upper flip arm. The present invention drives the upper flip arm to flip only by a telescopic cylinder, and can flip back and forth, and can realize the opening and closing of the movable mold and the static mold only by a telescopic cylinder. The wind turbine blade mold flipping device has a simple structure and relatively low cost. During the flipping process, there is no sudden change in the load of the telescopic cylinder, and the flipping action is smooth without shaking or retention, and the wind turbine blade is not damaged.

Description

Technical Field

[0001] The present invention belongs to the technical field of production equipment for wind turbine blades, and in particular relates to a wind turbine blade mold turning device and system. Background Art

[0002] Wind power generation, which uses wind energy, a green and unlimited natural resource, to generate electricity, has become a crucial component of the renewable energy sector. Wind blades are core components of wind turbines. Their production process involves closing the dynamic and static molds after casting, typically using a mold flipping device.

[0003] Existing wind turbine blade mold turning devices are dual-cylinder hydraulic turning machines consisting of a long-stroke turning cylinder, a short-stroke turning cylinder, an upper turning arm, a lower turning arm, a hydraulic pump station, and a control valve block. Driven by the long-stroke and short-stroke turning cylinders, the upper turning arm rotates approximately 180° around the mounting axis on the lower turning arm. The control valve block controls the rotation speed to meet the load requirements.

[0004] This dual-cylinder hydraulic flipping machine for wind turbine blade molds uses long and short stroke flipping cylinders to work together or alternately to perform flipping. The mold closing and flipping process is as follows:

[0005] In the first stage, the long and short cylinders work simultaneously, pushing the upper flip arm to flip from zero position. When it flips to the first floating angle (close to the "dead point" of the long-stroke flip cylinder), it enters the second stage.

[0006] In the second stage, the long-stroke flip cylinder stops working (but is not locked) and is in a floating state, and the short-stroke flip cylinder continues to flip. When it flips over the "dead point" of the long-stroke flip cylinder (the cylinder thrust passes the center of the flip axis and the flip torque is zero), it enters the third stage.

[0007] In the third stage, the long and short cylinders work simultaneously to continue the flip. When the floating angle of the short-stroke flip cylinder is reached, the fourth stage begins.

[0008] In the fourth stage, the short-stroke flip cylinder stops working (but is not locked) and is in a floating state, and the long-stroke flip cylinder continues to work and flip. When it flips over the "dead point" of the short-stroke flip cylinder (the cylinder thrust passes the center of the flip axis and the flip torque is zero), it enters the fifth stage.

[0009] In the fifth stage, the long and short cylinders continue to work simultaneously and flip to about 180 degrees to complete mold closing.

[0010] Mold opening is the reverse process of mold closing, and also requires long and short stroke cylinders to flip over in turn.

[0011] As can be seen from the mold closing process described above, the flipping mechanism typically utilizes two tilting cylinders operating simultaneously. When passing through the mechanism's "dead point," the two cylinders must switch. This switching process causes the large mold to wobble in mid-air, seriously compromising the safety of mold opening and closing. The existing dual-cylinder hydraulic flipping machine for wind turbine blade molds switches cylinders five times during the mold closing and flipping process. Furthermore, the cylinders must also switch five times during the mold opening process, for a total of ten switching cycles during the entire mold closing and opening process. Each switching between the single and dual working cylinders creates a significant pressure differential across the working cylinders, as the load (mold weight) remains constant during flipping. This creates a significant impact on the entire hydraulic system, impacting flipping accuracy and the lifespan of the hydraulic components. This manifests itself in the hydraulic flipping machine as a stagnant or jittering flip.

[0012] Numerous solutions exist both domestically and internationally for reversing dead spots in hydraulic tilting machines for wind turbine blade molds. Most of the publicly available solutions involve dual cylinders with a deformation mechanism, where each cylinder independently rotates 90 degrees to avoid the dead spot. Alternatively, dual cylinders with a transmission mechanism utilize an external force (a rack and pinion or slider mechanism) to rotate the cylinder and the upper tilting arm past the dead spot. Multiple cylinder mechanisms are also available.

[0013] The disadvantages of these solutions are obvious:

[0014] 1. The complexity of the mechanism increases, resulting in an increase in failure points.

[0015] 2. The manufacturing cost of the turning machine increases, and the subsequent maintenance cost also increases. Summary of the Invention

[0016] The purpose of the present invention is to provide a wind turbine blade mold flipping device and system to solve at least one of the problems of a double-cylinder wind turbine blade mold hydraulic flipping machine passing through the cylinder "dead point" during flipping, resulting in stagnation or jitter, complex structure, and increased maintenance costs.

[0017] The present invention provides a wind turbine blade mold flipping device, comprising a first connecting rod, a second connecting rod, a lower flip arm, an upper flip arm and a telescopic cylinder, wherein the upper flip arm is hinged to the lower flip arm, the second connecting rod is provided with three hinge positions, the three hinge positions of the second connecting rod are respectively hinged to the top of the lower flip arm, one end of the first connecting rod and the telescopic rod of the telescopic cylinder, the cylinder body of the telescopic cylinder is hinged to the bottom of the lower flip arm, and the other end of the first connecting rod is hinged to the upper flip arm.

[0018] As a further solution of the present invention: the telescopic cylinder drives the second connecting rod to rotate on the lower flip arm, thereby driving the first connecting rod to drive the upper flip arm to flip back and forth.

[0019] As a further solution of the present invention: the lower flip arm, the telescopic cylinder, and the first connecting rod are arranged in a triangle at the hinge position of the second connecting rod.

[0020] As a further solution of the present invention: the first connecting rod is a straight connecting rod, the second connecting rod is a triangular connecting rod, and the hinge positions of the lower flip arm, telescopic cylinder, first connecting rod and second connecting rod are respectively located at the three corners of the triangular connecting rod.

[0021] As a further solution of the present invention: the second connecting rod includes two parallel triangular connecting plates, the two triangular connecting plates are connected by a support rod, and the first connecting rod and the telescopic cylinder are both hinged between the two triangular connecting plates.

[0022] As a further solution of the present invention: the lower flip arm includes two symmetrically arranged lower arm plates, and the telescopic cylinder and the connecting rod are arranged between the two lower arm plates.

[0023] As a further solution of the present invention: the upper flip arm includes two symmetrically arranged upper arm plates, each of the two lower arm plates is hinged to an upper arm plate through a half-axis, and a telescopic cylinder drives the two upper arm plates to flip back and forth synchronously around the corresponding half-axis.

[0024] As a further solution of the present invention: an upper arm plate is arranged on the top of a lower arm plate, and another upper arm plate is arranged on the top of another lower arm plate. The two upper arm plates are located on opposite sides of the two lower arm plates, and the center plane between the two upper arm plates is coplanar with the center plane between the two lower arm plates.

[0025] As a further solution of the present invention: one side of the lower flip arm is connected to a static mold, the telescopic cylinder is arranged tilted, the cylinder body of the telescopic cylinder is hinged to the side of the lower flip arm facing the static mold, and the telescopic rod of the telescopic cylinder is tilted away from the static mold.

[0026] The present invention also provides a wind turbine blade mold turning system, which includes a plurality of wind turbine blade mold turning devices.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention drives the upper flip arm to flip only by one telescopic cylinder, and can flip back and forth. The movable mold and the static mold can be opened and closed by only one telescopic cylinder. The wind turbine blade mold flipping device has a simple structure, relatively low cost, and easy maintenance. During the flipping process, there is no sudden change in the load of the telescopic cylinder, and the flipping action is smooth without shaking or retention, and the wind turbine blade is not damaged.

[0029] 2. The upper flip arm is hinged to the lower flip arm, and the second connecting rod is also hinged to the lower flip arm. The second connecting rod is driven to rotate on the lower flip arm by the telescopic cylinder, which can drive the first connecting rod, so that the upper flip arm hinged to the first connecting rod can flip back and forth on the lower flip arm, realizing the opening and closing of the dynamic mold and static mold of the wind turbine blade. There is no "dead point" in the telescopic cylinder during the entire flipping process, and the structural stability and motion transmission efficiency of the flipping device are improved.

[0030] 3. The first connecting rod adopts a straight connecting rod and the second connecting rod adopts a triangular connecting rod, which is more suitable for the motion trajectory requirements of the flip device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar or repeated elements are not repeatedly labeled in the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0032] Figure 1 This is a structural diagram of a preferred embodiment of a wind turbine blade mold turning device according to the present invention;

[0033] Figure 2 An exploded view of a preferred embodiment of a wind turbine blade mold turning device according to the present invention;

[0034] Figure 3 This is a front view of a preferred embodiment of the wind turbine blade mold turning device of the present invention;

[0035] Figure 4 A side view of a preferred embodiment of a wind turbine blade mold turning device according to the present invention;

[0036] Figure 5 This is a schematic diagram of the mold opening state of a preferred embodiment of the wind turbine blade mold turning device of the present invention;

[0037] Figure 6 This is a schematic diagram of the mold closing state of a preferred embodiment of the wind turbine blade mold turning device of the present invention;

[0038] Figure 7 A schematic diagram of the wind turbine blade mold turning device of the present invention from the mold opening state to the mold closing state;

[0039] Figure 8 This is a schematic diagram of the mold closing state of a preferred embodiment of the wind turbine blade mold flipping system of the present invention.

[0040] In the figure: 1. Upper flip arm; 101. Upper arm plate; 102. First mounting hole; 103. Moving mold mounting hole; 104. Reinforcing rib plate; 2. First connecting rod; 3. Second connecting rod; 4. Lower flip arm; 401. Lower arm plate; 402. Second mounting hole; 403. Third mounting hole; 404. Fourth mounting hole; 405. Connecting rib plate; 5. Telescopic cylinder; 6. First mounting axis; 7. Second mounting axis; 8. Third mounting axis; 9. Fourth mounting axis; 10. Fifth mounting axis; 11. Half axis; 12. Moving mold; 13. Static mold; 14. Wind turbine blade. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0043] The terms "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The terms "include" or "comprises" and similar terms mean that the elements before the term include the elements listed after the term, and do not exclude the possibility of also including other elements. The terms "upper", "lower", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] In the present disclosure, when a specific device is described as being located between a first device and a second device, an intervening device may or may not be present between the specific device and the first device or the second device. When a specific device is described as being connected to another device, the specific device may be directly connected to the other device without an intervening device, or may be not directly connected to the other device but with an intervening device.

[0045] All terms (including technical or scientific terms) used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined as such herein.

[0046] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0047] See also Figure 1 、 Figure 2 As shown, this embodiment provides a wind turbine blade mold flipping device, including a first connecting rod 2, a second connecting rod 3, a lower flip arm 4, an upper flip arm 1 and a telescopic cylinder 5, the upper flip arm 1 is hinged to the lower flip arm 4, the second connecting rod 3 is provided with three hinge positions, the three hinge positions of the second connecting rod 3 are respectively hinged to the top of the lower flip arm 4, one end of the first connecting rod 2, and the telescopic rod of the telescopic cylinder 5, the cylinder body of the telescopic cylinder 5 is hinged to the bottom of the lower flip arm 4, and the other end of the first connecting rod 2 is hinged to the upper flip arm 1.

[0048] Please note that Figure 8 As shown, the mold for producing wind turbine blades 14 includes a movable mold 12 and a static mold 13. The wind turbine blade mold flipping device provided by the present invention is used to realize the flipping of the movable mold 12, thereby completing the opening and closing of the movable mold 12 and the static mold 13. The static mold 13 is fixedly connected to the lower flip arm 4, and the movable mold 12 is fixedly connected to the upper flip arm 1. The mold opening is completed by driving the upper flip arm 1 to flip only through a telescopic cylinder 5. After the wind turbine blade 14 is taken out, the upper flip arm 1 is driven to flip in the opposite direction to complete the mold closing. The mold opening and closing actions can be repeated. The wind turbine blade mold flipping device has a simple structure and relatively low cost. There is no sudden change in the load of the telescopic cylinder 5 during the flipping process. The flipping action is smooth without shaking or retention, and does not damage the wind turbine blade 14. The flipping angle of the upper flip arm 1 is 180°±5°, which does not affect the mold opening and removal of the wind turbine blade 14.

[0049] The telescopic cylinder 5 drives the second connecting rod 3 to rotate on the lower flip arm 4, thereby driving the first connecting rod 2 to drive the upper flip arm 1 to flip back and forth. Figure 5 、 Figure 6As shown, the cylinder body of the telescopic cylinder 5 is mounted at the bottom of the lower flip arm 4. The telescopic rod of the telescopic cylinder 5 is connected to the second connecting rod 3. When the telescopic rod is extended, it pushes the second connecting rod 3 to rotate counterclockwise. The second connecting rod 3 pushes the first connecting rod 2 to move, causing the first connecting rod 2 to flip, thereby driving the upper flip arm 1 to rotate counterclockwise. By rationally designing the travel of the telescopic cylinder 5, as well as the shape and dimensions of the first and second connecting rods 2 and 3, the upper flip arm 1 can rotate counterclockwise 180°±5° during the extension stroke of the telescopic cylinder 5 and rotate clockwise to reset during the retraction stroke of the telescopic cylinder 5. The back-and-forth extension and retraction of the telescopic cylinder 5 drives the upper flip arm 1 to flip the movable mold 12 back and forth, achieving the opening and closing of the movable mold 12 and the static mold 13.

[0050] The upper flip arm 1 is movably connected to the lower flip arm 4, and the second connecting rod 3 is also movably connected to the lower flip arm 4. The second connecting rod 3 is driven to rotate on the lower flip arm 4 by the telescopic cylinder 5, which can drive the first connecting rod 2, so that the upper flip arm 1 movably connected to the first connecting rod 2 can flip back and forth on the lower flip arm 4, thereby realizing the opening and closing of the movable mold 12 and the static mold 13 of the wind turbine blade 14. During the entire flipping process, the telescopic cylinder 5 has no "dead point" and the movement is smooth. The structural stability and motion transmission efficiency of the flipping device are improved.

[0051] Exemplarily, the lower flip arm 4, the telescopic cylinder 5, and the first connecting rod 2 are arranged in a triangular shape at the connection position of the second connecting rod 3. Preferably, the layout is an equilateral triangle, which has uniform force and good stability of the entire structure.

[0052] In some embodiments, see Figure 2 As shown, the first connecting rod 2 is a straight connecting rod, while the second connecting rod 3 is a triangular connecting rod, which better meets the motion trajectory requirements of the tilting device. The three corners of the second connecting rod 3 are chamfered to reduce stress concentration, improve fatigue resistance and service life, while also reducing weight and preventing injuries from sharp edges. The connection points of the lower tilting arm 4, telescopic cylinder 5, first connecting rod 2, and second connecting rod 3 are located at the three corners of the triangular connecting rod.

[0053] That is, three assembly holes are respectively opened on the three corners of the second connecting rod 3, and the lower flip arm 4, the first connecting rod 2, and the telescopic cylinder 5 are respectively assembled in the three assembly holes in a clockwise order.

[0054] The first connecting rod 2 adopts a straight connecting rod. The second connecting rod 3 can be rotated by driving only a telescopic cylinder 5, thereby pushing the first connecting rod 2 to drive the upper flip arm 1 to perform a reciprocating motion of 180°±5°. There is no alternation and coordination of driving force, and there is no dead point. The movement is accurate, reliable and smooth.

[0055] In some embodiments, see Figure 2As shown, the second connecting rod 3 comprises two parallel triangular connecting plates, each with three mounting holes. These plates are used to connect to the corresponding mounting holes of the lower tilt arm 4, which then mount a rod. The telescopic rod end of the telescopic cylinder 5 is hinged between the two triangular connecting plates, and one end of the first connecting rod 2 is also hinged between the two triangular connecting plates. This structure of the first and second connecting rods 2 and 3 improves the stability of the connecting rod assembly, ensuring a more precise and reliable motion trajectory. The two connecting plates are connected by a support rod, enhancing the structural performance of the second connecting rod 3.

[0056] In some embodiments, see Figure 2 、 Figure 3 、 Figure 4 As shown, the lower flip arm 4 includes two symmetrically arranged lower arm plates 401, with the telescopic cylinder 5, first connecting rod 2, and second connecting rod 3 disposed between the two lower arm plates 401. The upper flip arm 1 includes two symmetrically arranged upper arm plates 101, each hingedly connected to an upper arm plate 101 via a semi-axle 11. A single telescopic cylinder 5 drives the two upper arm plates 101 to synchronously reciprocate about their corresponding semi-axles 11. One upper arm plate 101 is disposed on top of one lower arm plate 401, and the other upper arm plate 101 is disposed on top of the other lower arm plate 401. The two upper arm plates 101 are located on opposite sides of the two lower arm plates 401. Preferably, both upper arm plates 101 are located between the two lower arm plates 401, but this can also be understood as the upper arm plates 101 being disposed on the inner side of the lower arm plates 401. Of course, it is equally feasible for both upper arm plates 101 to be disposed on the outer side of the corresponding lower arm plates 401. The center plane between the two upper arm plates 101 is coplanar with the center plane between the two lower arm plates 401, maintaining synchronization and balance in the flipping of the two upper arm plates 101. The upper arm plates 101 correspond one-to-one with the lower arm plates 401, and each upper arm plate 101 can rotate back and forth on its corresponding lower arm plate 401 around its corresponding half-shaft 11, thereby flipping the movable mold 12 back and forth. Preferably, the center axis of the connection between the second connecting rod 3 and the lower flip arm 4 and the center axis of the half-shaft 11 are located in the same horizontal plane, making the flipping of the upper flip arm 1 smoother and more labor-saving, and eliminating dead spots in the telescopic cylinder 5.

[0057] Furthermore, the upper arm plate 101 is provided with a first mounting hole 102, a movable mold mounting hole 103, and a fifth mounting hole. Specifically, the upper arm plate 101 can be configured as a triangular shape. This is so-called because the three corners of the upper arm plate 101 are chamfered. This chamfering reduces the weight of the upper arm plate 101 and the load on the telescopic rod, but also reduces the risk of damage and unsafety due to sharp corners. The first mounting hole 102 and movable mold mounting hole 103 are located near one side of the upper arm plate 101, while the fifth mounting hole is located diagonally opposite the side of the first mounting hole 102 and movable mold mounting hole 103. The movable mold mounting hole 103 is used to mount the movable mold 12.

[0058] Furthermore, the lower arm plate 401 is provided with a second mounting hole 402, a third mounting hole 403, and a fourth mounting hole 404. The second mounting hole 402 and the third mounting hole 403 are arranged horizontally side by side at the top of the lower arm plate 401, and the fourth mounting hole 404 is arranged at the bottom of the lower arm plate 401. The fourth mounting hole 404 and the second mounting hole 402 are located on the same side of the lower arm plate 401, specifically, on the side closer to the static mold 13 when the mold is open, while the third mounting hole 403 is located on the side closer to the movable mold 12. The telescopic cylinder 5 is arranged at an angle, with the cylinder body of the telescopic cylinder 5 assembled in the fourth mounting hole 404. The telescopic rod of the telescopic cylinder 5 is tilted upward toward the movable mold 12 and assembled in the assembly hole of the second connecting rod 3.

[0059] For example, see Figure 2-Figure 4 As shown, the telescopic cylinder 5 is provided with a rotating ring at each end. A second mounting shaft 7 is mounted in the center of the rotating ring on the cylinder body, and the ends of the second mounting shaft 7 are assembled into two fourth mounting holes 404. It should be noted that if the second mounting shaft 7 is fixedly assembled in the fourth mounting holes 404, the rotating ring on the cylinder body is rotationally connected to the second mounting shaft 7, and the rotating ring on the cylinder body is preferably mounted in the center of the second mounting shaft 7 to prevent axial movement along the second mounting shaft 7. If the second mounting shaft 7 can rotate in the fourth mounting holes 404, the rotating ring on the cylinder body is fixedly mounted in the center of the second mounting shaft 7. A fourth mounting shaft 9 is mounted in the center of the rotating ring at the end of the telescopic rod of the telescopic cylinder 5, and the ends of the fourth mounting shaft 9 are assembled into the corresponding mounting holes of the two connecting plates. It should be noted that, if the fourth mounting shaft 9 is fixedly assembled in the assembly hole of the connecting plate, the rotating ring at the end of the telescopic rod is rotatably connected to the fourth mounting shaft 9, and the rotating ring at the end of the retracted rod is sleeved on the center position of the fourth mounting shaft 9 so as not to cause axial movement along the fourth mounting shaft 9; if the fourth mounting shaft 9 can rotate in the assembly hole of the connecting plate, the rotating ring at the end of the telescopic rod is fixedly sleeved on the center position of the fourth mounting shaft 9.

[0060] For example, see Figure 2-Figure 4 As shown, the support rod of the second connecting rod 3 can be hollow in the axial direction, with a first mounting shaft 6 extending through the support rod, and the two ends of the first mounting shaft 6 respectively mounted in the two second mounting holes 402. It should be noted that if the first mounting shaft 6 is fixedly mounted in the mounting hole of the connecting plate, the first mounting shaft 6 can rotate in the second mounting holes 402. If the first mounting shaft 6 is fixedly mounted in the second mounting holes 402, the first mounting shaft 6 can rotate in the mounting hole of the connecting plate. The second connecting rod 3 is preferably mounted on the first mounting shaft 6 in a central position to prevent axial movement along the first mounting shaft 6. The central axis of the connection between the second connecting rod 3 and the lower flip arm 4 is the central axis of the first mounting shaft 6.

[0061] For example, see Figure 2As shown, a fifth mounting shaft 10 is installed in another pair of corresponding assembly holes of the two connecting plates, and one end of the first connecting rod 2 is sleeved on the center position of the fifth mounting shaft 10. If the fifth mounting shaft 10 is fixedly assembled in the assembly hole of the connecting plate, the first connecting rod 2 is sleeved on the center position of the fifth mounting shaft 10 and can rotate around the fifth mounting shaft 10, so that the first connecting rod 2 does not move axially along the fifth mounting shaft 10; if the fifth mounting shaft 10 can rotate in the assembly hole of the connecting plate, the first connecting rod 2 is fixedly sleeved on the center position of the fifth mounting shaft 10.

[0062] For example, see Figure 2 As shown, the other end of the first connecting rod 2 is movably connected to the upper flip arm 1 via the third mounting shaft 8. Specifically, the first connecting rod 2 is mounted in the center of the third mounting shaft 8, and the ends of the third mounting shaft 8 are respectively mounted in the two first mounting holes 102. If the ends of the third mounting shaft 8 are fixedly mounted in the two first mounting holes 102, the first connecting rod 2 can rotate about the third mounting shaft 8, preferably without axial movement along the third mounting shaft 8. If the first connecting rod 2 is fixedly mounted on the third mounting shaft 8, the third mounting shaft 8 can rotate in the first mounting holes 102.

[0063] For example, see Figure 2-Figure 4 As shown, the half shaft 11 is installed in the fifth mounting hole and the third mounting hole 403 and is limited at both ends to flexibly connect the upper arm plate 101 and the lower arm plate 401.

[0064] It should be noted that the first mounting shaft 6, the second mounting shaft 7, the third mounting shaft 8, the fourth mounting shaft 9, the fifth mounting shaft 10 and the half shaft 11 are all provided with limiting structures to limit the components assembled thereon to prevent them from falling out.

[0065] In some embodiments, a connecting rib 405 is provided between the two lower arm plates 401, and a reinforcing rib 104 is provided between the two upper arm plates 101. The structural performance of the mold turning device is enhanced by providing the connecting rib 405 and the reinforcing rib 104.

[0066] The turning center of the upper turning arm 1 is located on the axis of the two half shafts 11. During the turning process of the wind turbine blade mold turning device, the distance line from the turning center to the second mounting axis 7 (see Figure 7 The position of m) does not change, but the distance line between the second mounting axis 7 and the fourth mounting axis 9 changes (see Figure 7 As for the position of l), those skilled in the art know that when l and m coincide, the telescopic cylinder will get stuck, i.e., the "dead point". Figure 7, l1 refers to the distance line between the second mounting axis 7 and the fourth mounting axis 9 when the wind turbine blade mold flipping device of the present invention is in the mold opening state, l2 refers to the distance line between the second mounting axis 7 and the fourth mounting axis 9 when the wind turbine blade mold flipping device of the present invention is in the mold closing state, Figure 7 It can be seen that during the movement of the flip mechanism from mold opening to mold closing, the position of the distance line connecting the second mounting axis 7 and the fourth mounting axis 9 moves from l1 to l2, always located on one side of m, with l increasingly moving away from m and not overlapping. Conversely, during the movement from mold closing to mold opening, the position of the distance line connecting the second mounting axis 7 and the fourth mounting axis 9 moves from l2 to l1, and l and m also do not overlap. Therefore, by driving the second connecting rod 3 to rotate on the lower flip arm 4 through the telescopic cylinder 5, the first connecting rod 2 can be driven, causing the upper flip arm 1, which is movably connected to the first connecting rod 2, to flip back and forth on the lower flip arm 4, thereby achieving the opening and closing of the movable mold 12 and the static mold 13 of the wind turbine blade 14. During the entire flipping process, the telescopic cylinder 5 has no "dead points", improving the structural stability and motion transmission efficiency of the flip mechanism.

[0067] It should be noted that the telescopic cylinder 5 is a hydraulic cylinder connected to a hydraulic pump station via an oil pipeline, which is equipped with a control valve group. A control system can also be provided to connect the motor of the hydraulic pump station and the control valve group to achieve automated control of the wind turbine blade mold turning device.

[0068] The length of the wind turbine blade 14 is usually long (up to more than 100 meters). Therefore, the length of the movable mold 12 and the static mold 13 used to produce the wind turbine blade 14 is usually long. It is difficult to achieve smooth and fluent flipping of the movable mold 12 by relying on only one wind turbine blade mold flipping device. This embodiment provides a wind turbine blade mold flipping system. Figure 8 As shown, the system includes multiple wind blade mold turning devices. The motor of the hydraulic pump station and the corresponding control valve group of each wind blade mold turning device are connected to the same control system, achieving unified automated control to maintain the synchronization of the wind blade mold turning devices. It should be noted that the spacing between adjacent wind blade mold turning devices is determined by the shape and size of the wind blade 14. In heavier parts of the mold, the spacing between adjacent wind blade mold turning devices is smaller, while in lighter parts, the spacing between adjacent wind blade mold turning devices is larger. Through reasonable layout and control, the entire turning process proceeds smoothly.

[0069] It should be noted that the oil supply device, control valve group and control system of the telescopic cylinder 5 are not the improvement points of this application and will not be described in detail here. At present, there are mature oil supply devices, control valve groups and control systems for the telescopic cylinder 5 in this field, which can be used for this application.

[0070] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A wind turbine blade mold turning device, characterized in that: The invention comprises a first connecting rod, a second connecting rod, a lower flip arm, an upper flip arm and a telescopic cylinder, the upper flip arm is hinged to the lower flip arm, the first connecting rod is a straight connecting rod, the second connecting rod is a triangular connecting rod, the second connecting rod is provided with three hinge positions, and the three hinge positions are respectively located at the three corners of the triangular connecting rod, the three hinge positions of the second connecting rod are respectively hinged to the top of the lower flip arm, one end of the first connecting rod and the telescopic rod of the telescopic cylinder, the cylinder body of the telescopic cylinder is hinged to the bottom of the lower flip arm, the other end of the first connecting rod is hinged to the upper flip arm, the distance line between the hinge axis of the cylinder body of the telescopic cylinder on the lower flip arm and the hinge axis of the telescopic rod of the telescopic cylinder on the second connecting rod is located on one side of the distance line between the hinge axis of the cylinder body of the telescopic cylinder on the lower flip arm and the flip center.

2. A wind turbine blade mold turning device according to claim 1, characterized in that: The telescopic cylinder drives the second connecting rod to rotate on the lower flip arm, thereby driving the first connecting rod to drive the upper flip arm to flip back and forth.

3. The wind turbine blade mold turning device according to claim 1, characterized in that: The second connecting rod includes two triangular connecting plates arranged in parallel, the two triangular connecting plates are connected by a support rod, and the first connecting rod and the telescopic cylinder are both hinged between the two triangular connecting plates.

4. The wind turbine blade mold turning device according to claim 1, characterized in that: The lower flip arm comprises two symmetrically arranged lower arm plates, and the telescopic cylinder and the connecting rod are arranged between the two lower arm plates.

5. The wind turbine blade mold turning device according to claim 4, characterized in that: The upper flip arm comprises two symmetrically arranged upper arm plates, each of the two lower arm plates is hinged to an upper arm plate via a half-axis, and a telescopic cylinder drives the two upper arm plates to flip synchronously back and forth around the corresponding half-axis.

6. The wind turbine blade mold turning device according to claim 5, characterized in that: An upper arm plate is arranged on the top of a lower arm plate, and another upper arm plate is arranged on the top of another lower arm plate. The two upper arm plates are located on opposite sides of the two lower arm plates, and the center plane between the two upper arm plates is coplanar with the center plane between the two lower arm plates.

7. The wind turbine blade mold turning device according to claim 1, characterized in that: One side of the lower flip arm is connected to a static mold, the telescopic cylinder is arranged tilted, the cylinder body of the telescopic cylinder is hinged to the side of the lower flip arm facing the static mold, and the telescopic rod of the telescopic cylinder is tilted away from the static mold.

8. A wind turbine blade mold turning system, characterized in that: The invention comprises a plurality of wind turbine blade mold turning devices according to any one of claims 1 to 7.

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