Wind power blade mold turnover device and system

Abstract

The invention discloses a wind power blade mold turnover device and system, and belongs to the technical field of production equipment of wind power blades, the wind power blade mold turnover device comprises a first connecting rod, a second connecting rod, a lower turnover arm, an upper turnover arm and a telescopic cylinder, the upper turnover arm is hinged to the lower turnover arm, the second connecting rod is provided with three hinge positions, and the telescopic cylinder is arranged on the first connecting rod. The three hinged positions of the second connecting rod are hinged to the top of the lower overturning arm, one end of the first connecting rod and a telescopic rod of the telescopic cylinder respectively, a cylinder body of the telescopic cylinder is hinged to the bottom of the lower overturning arm, and the other end of the first connecting rod is hinged to the upper overturning arm. According to the wind power blade mold overturning device, the upper overturning arm is driven to overturn only through one telescopic cylinder, reciprocating overturning can be achieved, opening and closing of the movable mold and the static mold can be achieved only through one telescopic cylinder, the wind power blade mold overturning device is simple in structure and relatively low in cost, the load of the telescopic cylinder is not suddenly changed in the overturning process, the overturning action is stable and free of shaking and retention, and a wind power blade is not damaged.

Description

Technical Field

[0001] The present invention belongs to the technical field of production equipment for wind power blades, and particularly relates to a turnover device and system for wind power blade molds. Background Art

[0002] Wind power generation refers to the use of wind energy, a green and infinite natural resource, by wind turbine generators to generate electricity, which has become an important part of the new energy field. Wind power blades are the core components of wind turbine generators, and their production process includes the closing of the moving mold and the stationary mold after pouring, and the closing is usually carried out through a mold turnover device.

[0003] The existing turnover device for wind power blade molds consists of a long-stroke turnover oil cylinder, a short-stroke turnover oil cylinder, an upper turnover arm, a lower turnover arm, a hydraulic pump station, and a control valve group to form a double-oil-cylinder hydraulic turnover machine for wind power blade molds. The upper turnover arm rotates back and forth about 180° around the installation shaft on the lower turnover arm under the drive of the long-stroke turnover oil cylinder and the short-stroke turnover oil cylinder, and the rotation speed is controlled by the control valve group to meet the operation requirements of the load.

[0004] This double-oil-cylinder hydraulic turnover machine for wind power blade molds uses the long-stroke and short-stroke turnover oil cylinders to work together or alternately for relay turnover. The mold closing turnover process is as follows: In the first stage, the long-stroke and short-stroke oil cylinders work simultaneously to push the upper turnover arm to start turning from the zero position. When it turns to the first floating angle (close to the "dead point" of the long-stroke turnover oil cylinder), it enters the second stage.

[0005] In the second stage, the long-stroke turnover oil cylinder stops working (but is not locked) and is in a floating state, and the short-stroke turnover oil cylinder continues to turn. When it turns past the "dead point" of the long-stroke turnover oil cylinder (the thrust of the oil cylinder passes through the center of the turning shaft and the turning moment is zero), it enters the third stage.

[0006] In the third stage, the long-stroke and short-stroke oil cylinders work simultaneously to continue turning. When it reaches the floating angle of the short-stroke turnover oil cylinder, it enters the fourth stage.

[0007] In the fourth stage, the short-stroke turnover oil cylinder stops working (but is not locked) and is in a floating state, and the long-stroke turnover oil cylinder continues to work and turn. When it turns past the "dead point" of the short-stroke turnover oil cylinder (the thrust of the oil cylinder passes through the center of the turning shaft and the turning moment is zero), it enters the fifth stage.

[0008] In the fifth stage, the long-stroke and short-stroke oil cylinders continue to work and turn until about 180° to complete the mold closing.

[0009] As the reverse working process of mold closing, the opening of the mold also requires the long-stroke and short-stroke oil cylinders to take over the turnover.

[0010] As can be seen from the mold closing process described above, the flipping mechanism generally involves two flipping oil cylinders acting simultaneously. When passing through the "dead point" of the mechanism, the two oil cylinders must be switched. During the switching process, the huge mold will shake in mid-air, seriously affecting the safety of mold opening and closing. In the existing double-oil-cylinder hydraulic flipping machine for wind turbine blade molds, the oil cylinders are switched 5 times during the mold closing flipping process. Additionally, during the mold opening process, the oil cylinders also need to be switched 5 times. The entire mold closing and opening process requires a total of 10 switches. And each time the single and double working oil cylinders are switched, since the load (mold weight) remains unchanged during flipping, a large oil pressure difference will be generated on the working oil cylinders, resulting in a large impact on the entire hydraulic system, affecting the flipping accuracy and the service life of hydraulic components. What is reflected on the hydraulic flipping machine is that the flipping shows retention or jitter.

[0011] There are many solutions at home and abroad regarding the flipping "dead point" of the hydraulic flipping machine for wind turbine blade molds. Most of the publicly disclosed ones are double oil cylinders plus a deformation mechanism, where each oil cylinder is responsible for 90° flipping respectively to avoid the flipping "dead point" of the oil cylinder, or double oil cylinders plus a transmission mechanism. When the oil cylinder reaches the flipping "dead point", the oil cylinder and the upper flipping arm are flipped together past the "dead point" of the oil cylinder by an external force (gear rack or slider mechanism). There are also multi-oil-cylinder mechanisms.

[0012] The disadvantages of these solutions are relatively obvious: 1. The complexity of the mechanism increases, resulting in an increase in the number of failure points.

[0013] 2. The manufacturing cost of the flipping mechanism increases, and the later maintenance cost also increases accordingly. Summary of the Invention

[0014] The purpose of the present invention is to provide a flipping device and system for wind turbine blade molds to solve at least one of the problems such as passing through the "dead point" of the oil cylinder during the flipping process of the double-oil-cylinder hydraulic flipping machine for wind turbine blade molds, resulting in retention or jitter, complex structure, and increased maintenance cost.

[0015] The present invention provides a flipping device for wind turbine blade molds, which includes a first connecting rod, a second connecting rod, a lower flipping arm, an upper flipping arm, and a telescopic cylinder. The upper flipping arm is hinged to the lower flipping arm. There are three hinged positions on the second connecting rod, and the three hinged positions of the second connecting rod are respectively hinged to the top of the lower flipping 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 flipping arm, and the other end of the first connecting rod is hinged to the upper flipping arm.

[0016] As a further aspect of the present invention: The telescopic cylinder drives the second connecting rod to rotate on the lower flipping arm, thereby driving the first connecting rod to drive the upper flipping arm to reciprocally flip.

[0017] As a further aspect of the present invention: The lower flipping arm, the telescopic cylinder, and the first connecting rod are arranged in a triangular layout at the hinged position of the second connecting rod.

[0018] 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 turning arm, the telescopic cylinder, the first connecting rod and the second connecting rod are respectively located at the three corners of the triangular connecting rod.

[0019] As a further solution of the present invention: the second connecting rod includes two triangular connecting plates arranged in parallel, and the two triangular connecting plates are connected by a support rod. The first connecting rod and the telescopic cylinder are both hinged between the two triangular connecting plates.

[0020] As a further solution of the present invention: the lower turning arm includes two lower arm plates arranged symmetrically, and the telescopic cylinder and the connecting rod are arranged between the two lower arm plates.

[0021] As a further solution of the present invention: the upper turning arm includes two upper arm plates arranged symmetrically. Each of the two lower arm plates is hinged to one of the upper arm plates through a half shaft, and a telescopic cylinder drives the two upper arm plates to reciprocate and turn synchronously around the corresponding half shafts respectively.

[0022] As a further solution of the present invention: one upper arm plate is arranged on the top of one lower arm plate, and the other upper arm plate is arranged on the top of the other lower arm plate. The two upper arm plates are located on the opposite sides of the two lower arm plates, and the central plane between the two upper arm plates is coplanar with the central plane between the two lower arm plates.

[0023] As a further solution of the present invention: a static mold is connected to one side of the lower turning arm. The telescopic cylinder is arranged obliquely. The cylinder body of the telescopic cylinder is hinged to the side of the lower turning arm facing the static mold, and the telescopic rod of the telescopic cylinder is inclined towards the side away from the static mold.

[0024] The present invention also provides a wind power blade mold turning system, which includes a plurality of wind power blade mold turning devices.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention only uses one telescopic cylinder to drive the upper turning arm to turn, and can reciprocate. Only one telescopic cylinder can realize the opening and closing of the moving mold and the static mold. The wind power blade mold turning device has a simple structure, relatively low cost, convenient maintenance, no sudden change in the load of the telescopic cylinder during the turning process, smooth turning action without jitter or retention, and does not damage the wind power blade.

[0026] 2. The upper turning arm is hinged to the lower turning arm, and the second connecting rod is also hinged to the lower turning arm. By driving the second connecting rod to rotate on the lower turning arm through the telescopic cylinder, the first connecting rod can be driven, and the upper turning arm hinged to the first connecting rod can turn back and forth on the lower turning arm, realizing the opening and closing of the moving mold and the static mold of the wind power blade. There is no "dead point" for the telescopic cylinder during the whole turning process, and the structural stability and motion transmission efficiency of the turning device are improved.

[0027] 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 flipping device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar or repeated elements are not repeatedly marked with identification signs. The elements or parts in the drawings are not necessarily drawn according to the actual scale.

[0029] Figure 1 It is a schematic structural diagram of a preferred embodiment of the flipping device for a wind turbine blade mold of the present invention; Figure 2 It is an exploded view of a preferred embodiment of the flipping device for a wind turbine blade mold of the present invention; Figure 3 It is a front view of a preferred embodiment of the flipping device for a wind turbine blade mold of the present invention; Figure 4 It is a side view of a preferred embodiment of the flipping device for a wind turbine blade mold of the present invention; Figure 5 It is a schematic diagram of the mold opening state of a preferred embodiment of the flipping device for a wind turbine blade mold of the present invention; Figure 6 It is a schematic diagram of the mold closing state of a preferred embodiment of the flipping device for a wind turbine blade mold of the present invention; Figure 7 It is a schematic diagram of the mold opening state to the mold closing state of the flipping device for a wind turbine blade mold of the present invention; Figure 8 It is a schematic diagram of the mold closing state of a preferred embodiment of the flipping system for a wind turbine blade mold of the present invention.

[0030] In the figure: 1. Upper flipping 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 flipping 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 shaft; 7. Second mounting shaft; 8. Third mounting shaft; 9. Fourth mounting shaft; 10. Fifth mounting shaft; 11. Half shaft; 12. Moving mold; 13. Static mold; 14. Wind turbine blade. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be 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 used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Generally, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0032] Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0033] The terms "first", "second" and similar terms used in this disclosure do not denote any order, quantity or importance, but are only used to distinguish different parts. Terms such as "including" or "comprising" mean that the elements before this word cover the elements listed after this word, and do not exclude the possibility of also covering other elements. Terms such as "upper", "lower", "left", "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] In this disclosure, when it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When it is described that a specific device is connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices and have an intermediate device.

[0035] All terms used in this disclosure (including technical terms or scientific terms) have the same meaning as understood by those of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as those, 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 overly formal sense, unless specifically defined as such here.

[0036] For technologies, methods and devices known to those of ordinary skill in the relevant art, detailed discussions may not be made, but where appropriate, the technologies, methods and devices should be regarded as part of the specification.

[0037] Please refer to Figure 1 、 Figure 2As shown in the figure, this embodiment provides a wind turbine blade mold flipping device, which includes a first connecting rod 2, a second connecting rod 3, a lower flipping arm 4, an upper flipping arm 1, and a telescopic cylinder 5. The upper flipping arm 1 is hinged to the lower flipping arm 4. There are three hinged positions on the second connecting rod 3, and the three hinged positions of the second connecting rod 3 are respectively hinged to the top of the lower flipping 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 flipping arm 4, and the other end of the first connecting rod 2 is hinged to the upper flipping arm 1.

[0038] It should be noted that, please refer to Figure 8 As shown in the figure, the mold for producing the wind turbine blade 14 includes a moving mold 12 and a stationary mold 13. The wind turbine blade mold flipping device provided by the present invention is used to flip the moving mold 12, so as to complete the opening and closing of the moving mold 12 and the stationary mold 13. The stationary mold 13 is fixedly connected to the lower flipping arm 4, and the moving mold 12 is fixedly connected to the upper flipping arm 1. Only by driving the upper flipping arm 1 to flip through a telescopic cylinder 5 to complete the mold opening, after taking out the wind turbine blade 14, driving the upper flipping arm 1 to flip in the reverse direction to complete the mold closing, and the opening and closing mold actions can be repeated. The structure of this wind turbine blade mold flipping device is simple, the cost is relatively low, the load of the telescopic cylinder 5 has no sudden change during the flipping process, the flipping action is stable without jitter and retention, and it does not damage the wind turbine blade 14. The flipping angle of the upper flipping arm 1 is 180° ± 5°, which does not affect the mold opening to take out the wind turbine blade 14.

[0039] The telescopic cylinder 5 drives the second connecting rod 3 to rotate on the lower flipping arm 4, so as to drive the first connecting rod 2 to drive the upper flipping arm 1 to reciprocally flip. Specifically, please refer to Figure 5 、 Figure 6 As shown in the figure, the cylinder body of the telescopic cylinder 5 is installed at the bottom of the lower flipping arm 4, and the telescopic rod of the telescopic cylinder 5 is connected to the second connecting rod 3. When the telescopic rod extends, it pushes the second connecting rod 3 to rotate counterclockwise. The second connecting rod 3 pushes the first connecting rod 2 to move, and the first connecting rod 2 will also flip, thereby driving the upper flipping arm 1 to rotate counterclockwise. By reasonably designing the stroke of the telescopic cylinder 5 and the shape and size of the first connecting rod 2 and the second connecting rod 3, the upper flipping arm 1 can be driven to rotate counterclockwise by 180° ± 5° during the extension stroke of the telescopic cylinder 5, and the upper flipping arm 1 can rotate clockwise to reset during the retraction stroke of the telescopic cylinder 5. The reciprocating extension and retraction of the telescopic cylinder 5 drive the upper flipping arm 1 to drive the moving mold 12 to flip back and forth, realizing the opening and closing of the moving mold 12 and the stationary mold 13.

[0040] The upper turning arm 1 is movably connected to the lower turning arm 4, and the second connecting rod 3 is also movably connected to the lower turning arm 4. By driving the second connecting rod 3 to rotate on the lower turning arm 4 through the telescopic cylinder 5, the first connecting rod 2 can be driven, and the upper turning arm 1 movably connected to the first connecting rod 2 can be turned back and forth on the lower turning arm 4, realizing the opening and closing of the moving mold 12 and the static mold 13 of the wind power blade 14. During the entire turning process, there is no "dead point" in the telescopic cylinder 5, the action is smooth, and the structural stability and motion transmission efficiency of the turning device are improved.

[0041] Exemplarily, the lower turning arm 4, the telescopic cylinder 5, and the first connecting rod 2 are arranged in a triangular layout at the connection position of the second connecting rod 3. Preferably, the layout is an equilateral triangle, with uniform force and good stability of the entire structure.

[0042] In some embodiments, please refer to Figure 2 As shown, the first connecting rod 2 is a straight connecting rod, and the second connecting rod 3 is a triangular connecting rod, which better adapts to the motion trajectory requirements of the turning device. The three corners of the second connecting rod 3 are respectively chamfered to reduce stress concentration, improve the fatigue resistance and service life of the second connecting rod 3, and at the same time, it can also reduce weight and prevent sharp edges from hurting people. The connection positions of the lower turning arm 4, the telescopic cylinder 5, and the first connecting rod 2 with the second connecting rod 3 are respectively located at the three corners of the triangular connecting rod.

[0043] That is, three assembly holes are respectively opened at the three corners of the second connecting rod 3, and the lower turning arm 4, the first connecting rod 2, and the telescopic cylinder 5 are respectively assembled into the three assembly holes in a clockwise order.

[0044] The first connecting rod 2 is a straight connecting rod. By driving only one telescopic cylinder 5, the second connecting rod 3 can be rotated, thereby driving the first connecting rod 2 to drive the upper turning arm 1 to perform a reciprocating motion of 180° ± 5°. There is no alternation and cooperation of driving forces, and there is no dead point, and the action is accurate, reliable and smooth.

[0045] In some embodiments, please refer to Figure 2 As shown, the second connecting rod 3 includes two triangular connecting plates arranged in parallel. Both triangular connecting plates are provided with three assembly holes, and the corresponding assembly holes for connecting the lower turning arm 4 on both triangular connecting plates are assembled with a support rod. The end of the telescopic rod of the telescopic cylinder 5 is hinged between the two triangular connecting plates, and one end of the first connecting rod 2 is hinged between the two triangular connecting plates. With the first connecting rod 2 and the second connecting rod 3 having such a structure, the stability of the connecting rod assembly is improved, and the motion trajectory is more accurate and reliable. The two connecting plates are connected by a support rod, enhancing the structural performance of the second connecting rod 3.

[0046] In some embodiments, please refer to Figure 2 、 Figure 3 、 Figure 4As shown, the lower turning arm 4 includes two symmetrically arranged lower arm plates 401, and the telescopic cylinder 5, the first connecting rod 2, and the second connecting rod 3 are arranged between the two lower arm plates 401. The upper turning arm 1 includes two symmetrically arranged upper arm plates 101. Each of the two lower arm plates 401 is hinged to one of the upper arm plates 101 through a half shaft 11. Only one telescopic cylinder 5 is used to drive the two upper arm plates 101 to reciprocate and turn synchronously around the corresponding half shafts 11 respectively. One of the upper arm plates 101 is arranged on the top of one of the lower arm plates 401, and the other upper arm plate 101 is arranged on the top of the other lower arm plate 401. The two upper arm plates 101 are located on the opposite sides of the two lower arm plates 401. Preferably, both of the two upper arm plates 101 are located between the two lower arm plates 401, which can also be understood as the upper arm plates 101 are arranged inside the lower arm plates 401. Of course, it is also feasible that the upper arm plates 101 are both arranged outside the corresponding lower arm plates 401. The central plane between the two upper arm plates 101 is coplanar with the central plane between the two lower arm plates 401, so as to maintain the synchronism and balance of the turning of the two upper arm plates 101. The upper arm plates 101 and the lower arm plates 401 are in one-to-one correspondence. Each upper arm plate 101 can rotate back and forth around its corresponding half shaft 11 on its corresponding lower arm plate 401, so as to drive the moving die 12 to turn back and forth. Preferably, the central axis of the connecting part of the second connecting rod 3 and the lower turning arm 4, and the central axis of the half shaft 11 are located on the same horizontal plane, so that the turning of the upper turning arm 1 is smoother and more labor-saving, and there is no dead point for the telescopic cylinder 5.

[0047] Furthermore, the upper arm plate 101 is provided with a first mounting hole 102, a moving die mounting hole 103 and a fifth mounting hole. Specifically, the upper arm plate 101 can be set as a quasi-triangle. The reason for calling it a quasi-triangle is that chamfers are made at the three corners of the upper arm plate 101. Making chamfers can, on the one hand, reduce the weight of the upper arm plate 101 and the load of the telescopic rod, and on the other hand, the sharp corners are easy to be damaged and unsafe. The first mounting hole 102 and the moving die mounting hole 103 are arranged close to one side edge of the upper arm plate 101, and the fifth mounting hole is arranged diagonally close to the side edge where the first mounting hole 102 and the moving die mounting hole 103 are located. The moving die mounting hole 103 is used for mounting the moving die 12.

[0048] 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 side by side in the horizontal direction at the top of the lower arm plate 401. 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 close to the stationary die 13 in the open die state, while the third mounting hole 403 is located on the side close to the moving die 12. The telescopic cylinder 5 is arranged obliquely. The cylinder body of the telescopic cylinder 5 is assembled in the fourth mounting hole 404, and the telescopic rod of the telescopic cylinder 5 is inclined upward toward the moving die 12 side and assembled in the assembly hole of the second connecting rod 3.

[0049] Exemplarily, please refer to Figures 2-4 As shown, at both ends of the telescopic cylinder 5, a rotating ring is provided. The center of the rotating ring located on the cylinder body is provided with a second mounting shaft 7, and both ends of the second mounting shaft 7 are assembled in two fourth mounting holes 404. It should be noted that if the second mounting shaft 7 is fixedly assembled in the fourth mounting hole 404, the rotating ring on the cylinder body is rotatably connected to the second mounting shaft 7, and the rotating ring on the cylinder body is sleeved in the middle position of the second mounting shaft 7 so as not to move axially along the second mounting shaft 7; if the second mounting shaft 7 can rotate in the fourth mounting hole 404, the rotating ring on the cylinder body is fixedly sleeved in the middle position of the second mounting shaft 7. The center of the rotating ring at the end of the telescopic rod of the telescopic cylinder 5 is provided with a fourth mounting shaft 9, and both ends of the fourth mounting shaft 9 are respectively assembled in the corresponding assembly 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 telescopic rod is sleeved in the middle position of the fourth mounting shaft 9 so as not to move axially 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 in the middle position of the fourth mounting shaft 9.

[0050] Exemplarily, please refer to Figures 2-4 As shown, the branch rod of the second connecting rod 3 can be internally hollow along the axial direction. A first mounting shaft 6 is penetrated through the branch rod, and both ends of the first mounting shaft 6 are respectively installed in two second mounting holes 402. It should be noted that if the first mounting shaft 6 is fixedly assembled in the assembly hole of the connecting plate, the first mounting shaft 6 can rotate in the second mounting hole 402; if the first mounting shaft 6 is fixedly assembled in the second mounting hole 402, the first mounting shaft 6 can rotate in the assembly hole of the connecting plate. The second connecting rod 3 is sleeved in the middle position of the first mounting shaft 6 so as not to move axially along the first mounting shaft 6. The central axis of the connection part between the second connecting rod 3 and the lower turning arm 4 is the central axis of the first mounting shaft 6.

[0051] Exemplarily, please refer to Figure 2 As shown, a fifth mounting shaft 10 is installed in another pair of corresponding assembly holes of the two connecting plates. One end of the first connecting rod 2 is sleeved in the middle 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 in the middle 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 in the middle position of the fifth mounting shaft 10.

[0052] Exemplarily, please refer to Figure 2As shown, the other end of the first connecting rod 2 is movably connected to the upper turning arm 1 through a third mounting shaft 8. Specifically, the first connecting rod 2 is sleeved in the middle position of the third mounting shaft 8, and both ends of the third mounting shaft 8 are respectively assembled in two first mounting holes 102. If both ends of the third mounting shaft 8 are fixedly assembled in the two first mounting holes 102, the first connecting rod 2 can rotate around the third mounting shaft 8, and it is appropriate not to move axially along the third mounting shaft 8; if the first connecting rod 2 is fixedly sleeved on the third mounting shaft 8, the third mounting shaft 8 can rotate in the first mounting hole 102.

[0053] Exemplarily, please refer to Figures 2-4 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, movably connecting the upper arm plate 101 and the lower arm plate 401.

[0054] It should be noted that the above-mentioned first mounting shaft 6, second mounting shaft 7, third mounting shaft 8, fourth mounting shaft 9, fifth mounting shaft 10, and half shaft 11 are all provided with limiting structures to limit the components assembled thereon and prevent them from coming out.

[0055] In some embodiments, a connecting rib plate 405 is further provided between the two lower arm plates 401; a reinforcing rib plate 104 is further provided between the two upper arm plates 101. By providing the connecting rib plate 405 and the reinforcing rib plate 104, the structural performance of the mold turning device is enhanced.

[0056] 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 position of the distance connection line from the turning center to the second mounting shaft 7 (see Figure 7 m in) will not change, and what changes is the position of the distance connection line between the second mounting shaft 7 and the fourth mounting shaft 9 (see Figure 7 l in). Those skilled in the art know that when l coincides with m, the telescopic cylinder will be stuck, that is, the "dead point". Please refer to Figure 7 , l1 refers to the distance connection line between the second mounting shaft 7 and the fourth mounting shaft 9 when the wind turbine blade mold turning device of the present invention is in the mold opening state, and l2 refers to the distance connection line between the second mounting shaft 7 and the fourth mounting shaft 9 when the wind turbine blade mold turning device of the present invention is in the mold closing state. From Figure 7It can be seen that during the movement of the flipping device from mold opening to mold closing, the position of the connecting line of the distance between the second mounting shaft 7 and the fourth mounting shaft 9 moves from l1 to l2, always on one side of m, and l gets farther and farther away from m and will not coincide. On the contrary, during the movement of the flipping device from mold closing to mold opening, the position of the connecting line of the distance between the second mounting shaft 7 and the fourth mounting shaft 9 moves from l2 to l1, and l will not coincide with m either. Therefore, by driving the second connecting rod 3 to rotate on the lower flipping arm 4 through the telescopic cylinder 5, the first connecting rod 2 can be driven, and the upper flipping arm 1 movably connected to the first connecting rod 2 can be flipped back and forth on the lower flipping arm 4, realizing the opening and closing of the moving mold 12 and the stationary mold 13 of the wind turbine blade 14. There is no "dead point" in the telescopic cylinder 5 during the whole flipping process, and the structural stability and motion transmission efficiency of the flipping device are improved.

[0057] It should be noted that the telescopic cylinder 5 uses a hydraulic cylinder. The telescopic cylinder 5 is connected to the hydraulic pump station through an oil pipeline, and a control valve group is provided on the oil pipeline. A control system can also be set to be associated with the motor of the hydraulic pump station and the control valve group to realize the automatic control of the flipping device of the wind turbine blade mold.

[0058] The length of the wind turbine blade 14 is usually relatively long (up to more than one hundred meters). Therefore, the lengths of the moving mold 12 and the stationary mold 13 for producing the wind turbine blade 14 are usually relatively long. It is very difficult to smoothly flip the moving mold 12 only by one flipping device of the wind turbine blade mold. This embodiment provides a flipping system for the wind turbine blade mold. Please refer to Figure 8 As shown in the figure, it includes a plurality of the above-mentioned flipping devices for the wind turbine blade mold. The motors of the hydraulic pump stations of each flipping device for the wind turbine blade mold and the corresponding control valve groups are all associated with the same control system to realize unified automatic control, so as to maintain the action synchronization of each flipping device for the wind turbine blade mold. It should be noted that the distance between two adjacent flipping devices for the wind turbine blade mold is determined according to the shape and size of the wind turbine blade 14. At the heavier part of the mold, the distance between two adjacent flipping devices for the wind turbine blade mold is smaller, and at the lighter part of the mold, the distance between two adjacent flipping devices for the wind turbine blade mold is larger. Through reasonable layout and control, the whole flipping process can proceed smoothly.

[0059] 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 elaborated here. At present, there are mature oil supply devices, control valve groups and control systems for the telescopic cylinder 5 in the art for this application to choose from.

[0060] The above content is only an example and explanation of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should all belong to the protection scope of the present invention.

Claims

1. A wind turbine blade mold flipping device, characterized in that, It includes a first connecting rod, a second connecting rod, a lower turning arm, an upper turning arm and a telescopic cylinder. The upper turning arm is hinged to the lower turning arm. The first connecting rod is a straight connecting rod. The second connecting rod is a triangular connecting rod. There are three hinged positions on the second connecting rod, which are respectively located at the three corners of the triangular connecting rod. The three hinged positions of the second connecting rod are respectively hinged to the top of the lower turning 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 turning arm. The other end of the first connecting rod is hinged to the upper turning arm.

2. The wind power blade mold flipping device according to claim 1, characterized in that, The telescopic cylinder drives the second connecting rod to rotate on the lower turning arm, so as to drive the first connecting rod to drive the upper turning arm to reciprocally turn over.

3. The wind power blade mold flipping 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. The first connecting rod and the telescopic cylinder are both hinged between the two triangular connecting plates.

4. A wind power blade mold flipping device according to claim 1, characterized in that, The lower turning arm includes two lower arm plates arranged symmetrically. The telescopic cylinder and the connecting rod are arranged between the two lower arm plates.

5. The wind power blade mold flipping device according to claim 4, characterized in that, The upper turning arm includes two upper arm plates arranged symmetrically. Each of the two lower arm plates is hinged to one of the upper arm plates through a half shaft. A telescopic cylinder drives the two upper arm plates to reciprocally turn over synchronously around the corresponding half shafts respectively.

6. The wind power blade mold flipping device according to claim 5, characterized in that, One upper arm plate is arranged on the top of one lower arm plate, and the other upper arm plate is arranged on the top of the other lower arm plate. The two upper arm plates are located on the opposite side of the two lower arm plates. The central plane between the two upper arm plates is coplanar with the central plane between the two lower arm plates.

7. A wind turbine blade mold flipping device according to claim 1, characterized in that, A static mold is connected to one side of the lower turning arm. The telescopic cylinder is arranged obliquely. The cylinder body of the telescopic cylinder is hinged to the side of the lower turning arm facing the static mold. The telescopic rod of the telescopic cylinder is inclined away from the static mold.

8. A wind turbine blade mold flipping system, characterized in that, It includes a plurality of wind turbine blade mold turning devices as described in any one of claims 1-7.

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