Special angle sub-arm applied to installation of fan hub

Abstract

This invention discloses a special-angle auxiliary boom for wind turbine hub installation, comprising a main boom and a wind turbine auxiliary boom connected by a first and second transition section that rotate relative to each other. The wind turbine auxiliary boom is equipped with a crane, which pulls a second traction rope for lifting the wind turbine hub. A support plate is vertically fixed on the second transition section. Both the main boom and the wind turbine auxiliary boom consist of two quadrilateral frames, each containing multiple internal support brackets for reinforcement and fixation. In the event of an accidental breakage of the first traction rope, it will not exert pressure on the second fixed pulley. The pressing plate, under the action of the second tension spring, releases the pressure restriction on the horizontal plate. As the wind turbine auxiliary boom rotates, the pressure rod slides against the surface with telescopic holes, thus achieving a braking effect on the wind turbine auxiliary boom in emergency situations.

Description

Technical Field

[0001] This invention relates to the field of wind turbine installation technology, and in particular to a special angle auxiliary arm used in wind turbine hub installation. Background Technology

[0002] Most crawler cranes currently manufactured are not equipped with wind power installation configurations, or the existing wind power configurations cannot meet the equipment installation needs of most wind farms. To meet the installation requirements of wind turbine equipment, crawler cranes are generally needed to lift heavy objects. However, the heavy objects must not interfere with the boom. Against this background, there is an urgent need for a special angle jib for wind turbine hub installation, which meets market demand and can solve problems such as motor interference with the boom and insufficient lifting height when installing wind turbine motors. However, the emergence of this jib only provides the effect of preventing the motor from interfering with the boom. If the traction rope breaks during use, the wind turbine hub lifted by the jib will fall on the boom.

[0003] To address this, we designed a special angled auxiliary boom for use in wind turbine hub mounting. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of the traction rope breaking during use, which would cause the wind turbine hub, which is lifted by the jib, to fall on the boom. The invention proposes a special angle jib for wind turbine hub installation.

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

[0006] A special angle jib for wind turbine hub installation includes a main boom and a wind turbine jib, which are connected by a first and a second transition section that rotate relative to each other. The wind turbine jib is equipped with a crane, and a second traction rope for lifting the wind turbine hub is pulled on the crane. A support plate is vertically fixed on the second transition section. Both the main boom and the wind turbine jib are two quadrilateral frames, and multiple internal support brackets for reinforcement are provided within the two quadrilateral frames. A first fixed pulley and a second fixed pulley are respectively provided on the main boom and the support plate. An electric winding machine is provided on the main boom, and a first traction rope is wound around the first and second fixed pulleys between the electric winding machine and the crane. The first and second fixed pulleys are respectively mounted on the main boom and the support plate via a first roller frame and a second roller frame. An emergency braking mechanism is provided on the support plate to prevent the wind turbine jib from swinging down rapidly. A brake auxiliary rod that slides on the support plate is provided on the first transition section.

[0007] Preferably, the first transition section and the second transition section are fixed to the opposite ends of the main boom and the wind turbine auxiliary boom, respectively. A second rotating shaft is fixed on the second transition section, and a rotating hole is provided on the first transition section. The first transition section and the second transition section are rotatably connected through the second rotating shaft and the rotating hole. A trigger buckle mechanism is provided in the first transition section, and a pressing elastic rod for sensing the pressure of the second traction rope is provided on the wind turbine auxiliary boom.

[0008] Preferably, the trigger latching mechanism includes a solenoid coil disposed in the first transition section, a first power supply group and a second power supply group connected end to end of the solenoid coil and disposed in parallel, and a fixing hole communicating with the rotating hole. The solenoid coil is fixed in the fixing hole by a top plate. The second rotating shaft is provided with a plurality of toothed grooves in a circular pattern, and a downward pressing toothed plate slides in the fixing hole. The bottom of the downward pressing toothed plate is provided with a tooth block group adapted to the toothed grooves.

[0009] Preferably, the pressing elastic rod is supported on the wind turbine sub-arm by a connecting bracket, and metal contacts are respectively provided on two adjacent quadrilateral frames in the wind turbine sub-arm, and the two adjacent metal contacts are interconnected by the pressing elastic rod located on the connecting bracket.

[0010] Preferably, the brake assist rod includes a pressure rod that slides on the surface of the support plate, a first rotating shaft that is rotatably disposed on the first transition section, and a connecting plate for connecting the pressure rod and the first rotating shaft, wherein the pressure rod slides on the surface of the support plate.

[0011] Preferably, the emergency braking mechanism includes a movable cavity formed within a support plate, a bottom support plate sliding within the movable cavity, multiple blocking blocks linearly arranged on the bottom support plate, and a set of limiting holes formed on the surface of the support plate and communicating with the movable cavity. The set of limiting holes includes multiple telescopic holes linearly arranged, and the distance between two adjacent telescopic holes is the same as the thickness of the blocking block. The blocking block has an arc-shaped groove on the side facing the second fixed pulley. The second roller frame has a telescopic rod penetrating the support plate. The outer wall of the telescopic rod is fitted with a second tension spring for resetting the second fixed pulley. The end of the telescopic rod away from the second fixed pulley has a pressing plate, and the movable cavity has a U-shaped limiting plate for blocking the pressing plate. A first tension spring is provided between the bottom support plate and the U-shaped limiting plate. The bottom support plate has a horizontal plate that abuts against the pressing plate.

[0012] The beneficial effects of this invention are as follows:

[0013] 1. In this invention, both the main boom and the auxiliary boom are two quadrilateral frames, and multiple internal support brackets for reinforcement and fixation are provided inside the two quadrilateral frames. This can improve the stability of the main boom and the auxiliary boom, preventing deformation of the main boom and the auxiliary boom when lifting the wind turbine hub. The main boom and the auxiliary boom are connected by a first transition section and a second transition section that rotate relative to each other. Thus, the wind turbine hub can be lifted by rotating the auxiliary boom, which can prevent the wind turbine hub from hitting the main boom and causing deformation and damage to the main boom.

[0014] 2. This invention requires controlling the angle between the main boom and the auxiliary boom within a suitable range. Since the auxiliary boom is rhomboid in shape, the angle between the main boom and the auxiliary boom can be adjusted by controlling the angles of its sides. That is, when... Figure 2 When the second traction rope is in close contact with the wind turbine's auxiliary boom, the triggering latching mechanism can be activated, thereby stopping the rotation between the main boom and the wind turbine's auxiliary boom.

[0015] 3. In this invention, when the first traction rope breaks unexpectedly, the first traction rope will not exert a squeezing force on the second fixed pulley. The pressing plate releases the squeezing restriction on the horizontal plate under the action of the second tension spring. As the wind turbine arm rotates, the pressure rod slides close to the surface with the telescopic hole, so that the braking effect of the wind turbine arm can be achieved in an emergency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the special angle auxiliary arm proposed in this invention for use in wind turbine hub installation;

[0017] Figure 2 This is a front view of the special angle auxiliary arm proposed in this invention for wind turbine hub installation;

[0018] Figure 3 This is a schematic diagram of the structure proposed in this invention, where the second fixed pulley inside the middle support plate of the special angle auxiliary arm for wind turbine hub installation does not pop out.

[0019] Figure 4 This is a front view of the second fixed pulley inside the middle support plate of the special angle auxiliary arm proposed in this invention for wind turbine hub installation, before it pops out.

[0020] Figure 5 This is a schematic diagram of the structure proposed in this invention for the ejection of the second fixed pulley inside the middle support plate of a special angle auxiliary arm used in wind turbine hub installation;

[0021] Figure 6 This is a front view of the second fixed pulley popping out from the middle support plate of the special angle auxiliary arm proposed in this invention for wind turbine hub installation;

[0022] Figure 7This is a schematic diagram of the structure within the first transition section of the special angle auxiliary arm for wind turbine hub installation proposed in this invention;

[0023] Figure 8 This is a schematic diagram of the pressing elastic rod in the special angle auxiliary arm for wind turbine hub installation proposed in this invention.

[0024] In the diagram: 1. Main boom; 2. First transition section; 3. Second transition section; 4. Wind turbine auxiliary boom; 5. Electric winding machine; 6. First fixed pulley; 7. Second fixed pulley; 8. First traction rope; 9. Hoist; 10. Second traction rope; 11. Pressing elastic rod; 12. Support plate; 13. Internal support bracket; 14. Pressing rod; 15. Connecting plate; 16. First rotating shaft; 17. Bottom support plate; 18. Blocking block; 19. Arc groove; 20. Telescopic hole; 21. U-shaped limiting plate; 22. Horizontal plate; 23. First tension spring; 24. Pressing plate; 25. Telescopic rod; 26. Second tension spring; 27. Second roller frame; 28. Second rotating shaft; 29. ​​Tooth groove; 30. Lower pressing tooth plate; 31. Helical coil; 32. Top plate; 33. Connecting bracket; 34. Metal contact. Detailed Implementation

[0025] Reference Figure 1-8 A special angle jib used for wind turbine hub mounting, including main boom 1 and wind turbine jib 4, see reference. Figure 1-2 Both the main boom 1 and the auxiliary boom 4 are two quadrilateral frames, and multiple internal support brackets 13 are provided inside the two quadrilateral frames for reinforcement and fixation. This can improve the stability of the main boom 1 and the auxiliary boom 4, so as to avoid deformation of the main boom 1 and the auxiliary boom 4 when lifting the wind turbine hub. The main boom 1 and the auxiliary boom 4 are connected by a first transition section 2 and a second transition section 3 that rotate with each other. Thus, the wind turbine hub can be lifted by rotating the auxiliary boom 4, which can prevent the wind turbine hub from hitting the main boom 1 and causing deformation and damage to the main boom 1.

[0026] Reference Figure 7The first transition section 2 and the second transition section 3 are fixed to the opposite ends of the main boom 1 and the auxiliary boom 4, respectively. A second rotating shaft 28 is fixed on the second transition section 3, and a rotating hole is provided on the first transition section 2. The first transition section 2 and the second transition section 3 are rotatably connected through the second rotating shaft 28 and the rotating hole, thus enabling the auxiliary boom 4 to rotate on the main boom 1. A trigger latching mechanism is provided inside the first transition section 2, which restricts the continued rotation of the first transition section 2 and the second transition section 3, thereby controlling the rotation of the auxiliary boom 4. Regarding the angle, if the angle between the main boom 1 and the auxiliary boom 4 is too large, the hoisted turbine hub will cause an overload on the first transition section 2 and the second transition section 3. Conversely, if the angle between the main boom 1 and the auxiliary boom 4 is too small, the hoisted turbine hub will collide with the main boom 1. Therefore, the angle between the main boom 1 and the auxiliary boom 4 needs to be controlled within a suitable range. Since the auxiliary boom 4 is a rhomboid structure, the angle between the main boom 1 and the auxiliary boom 4 can be adjusted by controlling the angle of its sides. Figure 1 When the second traction rope 10 is in close contact with the wind turbine auxiliary boom 4, the trigger latching mechanism can be activated, thereby stopping the rotation between the main boom 1 and the wind turbine auxiliary boom 4.

[0027] Reference Figure 7 As shown, the trigger latching mechanism includes a solenoid coil 31 disposed in the first transition section 2, a first power supply group and a second power supply group connected end to end of the solenoid coil 31 and disposed in parallel, and a fixing hole communicating with the rotating hole. The first power supply group and the second power supply group are both connected to the solenoid coil 31 end to end by means of DC power supply and wires. The first power supply group is connected to a pressing elastic rod 11 to control the current in the solenoid coil 31, while the second power supply group uses manual operation to control the power on and off to control the current in the solenoid coil 31.

[0028] The solenoid coil 31 is fixed in the fixing hole by the top plate 32. The second rotating shaft 28 has multiple circumferentially formed toothed grooves 29, and a downward pressing toothed plate 30 slides in the fixing hole. The bottom of the downward pressing toothed plate 30 has a tooth block assembly that matches the toothed grooves 29. The downward pressing toothed plate 30 is made of iron, so that the magnetic field generated by the current-carrying solenoid coil 31 can attract the downward pressing toothed plate 30 below, thus preventing the downward pressing toothed plate 30 from falling and engaging with the toothed grooves 29.

[0029] Reference Figure 8As shown, the wind turbine auxiliary boom 4 is equipped with a pressing elastic rod 11 for sensing the pressure of the second traction rope 10. The pressing elastic rod 11 is supported on the wind turbine auxiliary boom 4 by a connecting bracket 33. Metal contacts 34 are respectively provided on two adjacent quadrilateral frames of the wind turbine auxiliary boom 4, and the two adjacent metal contacts 34 are interconnected by the pressing elastic rod 11 located on the connecting bracket 33. When the wind turbine auxiliary boom 4 rotates, since the pressing elastic rod 11 on the connecting bracket 33 is sleeved, the second traction rope 10 presses against the pressing elastic rod 11, causing the pressing elastic rod 11 to deform. When the pressure is applied, the two ends of the elastic rod 11 will disengage from the metal contact 34. Since the elastic rod 11 is coaxially equipped with copper wires, the first power supply group is open-circuited at this time. As a result, the current in the solenoid 31 disappears, the magnetic field also disappears, and the solenoid 31 will no longer attract the lower pressure tooth plate 30. Consequently, the lower pressure tooth plate 30 is engaged with the tooth groove 29 on the second rotating shaft 28, thus limiting the rotation of the wind turbine auxiliary arm 4. When it is necessary to rotate the wind turbine auxiliary arm 4, the second power supply group is turned on, so that the solenoid 31 will attract the lower pressure tooth plate 30 again, thereby releasing the limitation on the rotation of the wind turbine auxiliary arm 4.

[0030] A crane 9 is installed on the auxiliary boom 4 of the wind turbine, and a second traction rope 10 for lifting the wind turbine hub is pulled on the crane 9. A support plate 12 is vertically fixed on the second transition section 3. A first fixed pulley 6 and a second fixed pulley 7 are respectively installed on the main boom 1 and the support plate 12. An electric winding machine 5 is installed on the main boom 1, and a first traction rope 8 is wound between the electric winding machine 5 and the crane 9, passing through the first fixed pulley 6 and the second fixed pulley 7. (Refer to...) Figure 1-2 This allows the rotation of the wind turbine arm 4 to be controlled by controlling the electric winding machine 5.

[0031] The first fixed pulley 6 and the second fixed pulley 7 are respectively mounted on the main boom 1 and the support plate 12 via the first roller frame and the second roller frame 27. The support plate 12 is provided with an emergency braking mechanism to prevent the wind turbine sub-boom 4 from swinging down rapidly. The first transition section 2 is provided with a braking auxiliary rod that slides on the support plate 12. The braking auxiliary rod includes a pressure rod 14 that slides on the surface of the support plate 12, a first rotating shaft 16 that is rotatably mounted on the first transition section 2, and a connecting plate 15 for connecting the pressure rod 14 and the first rotating shaft 16. The pressure rod 14 slides on the upper surface of the support plate 12. As the wind turbine sub-boom 4 rotates, the pressure rod 14 slides close to the surface with the telescopic hole 20, so that the braking effect of the wind turbine sub-boom 4 can be achieved in an emergency.

[0032] Reference Figure 3-6The emergency braking mechanism includes a movable cavity opened in the support plate 12, a bottom support plate 17 that slides in the movable cavity, a plurality of blocking blocks 18 linearly arranged on the bottom support plate 17, and a set of limiting holes opened on the surface of the support plate 12 and communicating with the movable cavity. The set of limiting holes includes a plurality of telescopic holes 20 linearly arranged, and the distance between two adjacent telescopic holes 20 is the same as the thickness of the blocking block 18, so that when the blocking block 18 retracts into the movable cavity, it can provide a tendency to prevent the blocking block 18 from rising.

[0033] The blocking block 18 has an arc-shaped groove 19 on the side facing the second fixed pulley 7. The second roller frame 27 has a telescopic rod 25 that passes through the support plate 12. A second tension spring 26 for resetting the second fixed pulley 7 is sleeved on the outer wall of the telescopic rod 25. A pressing plate 24 is provided at the end of the telescopic rod 25 away from the second fixed pulley 7, and a U-shaped limiting plate 21 for blocking the pressing plate 24 is provided inside the movable cavity. A first tension spring 23 is provided between the bottom support plate 17 and the U-shaped limiting plate 21. A horizontal plate 22 abuts against the pressing plate 24 on the bottom support plate 17. It should be noted that... Figure 3-4 The diagram shows the state during normal movement. At this time, due to the action of the first traction rope 8, the second fixed pulley 7 is in a pressing state, which will drive the pressing plate 24 to squeeze the horizontal plate 22, and finally make the multiple blocking blocks 18 on the bottom support plate 17 inside the support plate 12, so that it will not obstruct the sliding pressure rod 14.

[0034] When the first traction rope 8 breaks unexpectedly, it will no longer exert a squeezing force on the second fixed pulley 7. The pressing plate 24, under the action of the second tension spring 26, will release its squeezing restriction on the horizontal plate 22. (Refer to...) Figure 5-6 In that case, the bottom support plate 17 will be pulled to the ground by the first tension spring 23, which is set at an angle. Figure 5 In the event of an accidental breakage of the first traction rope 8, the wind turbine arm 4 will rotate, causing the pressure rod 14 on the support plate 12 to move toward the second transition section 3. The arc groove 19 on the blocking block 18 will then obstruct the pressure rod 14, thereby achieving an emergency braking effect.

[0035] The working principle of this invention is as follows: First, the electric winding machine 5 is turned on, allowing the wind turbine auxiliary arm 4 to rotate on the main arm 1. When the second traction rope 10 touches the pressing elastic rod 11 on the wind turbine auxiliary arm 4, it will drive the lower pressing tooth plate 30 to descend and lock into the tooth groove 29 on the second rotating shaft 28, thus completing the limiting of the wind turbine auxiliary arm 4. When the first traction rope 8 breaks accidentally, the first traction rope 8 will not exert a squeezing force on the second fixed pulley 7. The pressing plate 24 releases the squeezing restriction on the horizontal plate 22 under the action of the second tension spring 26. The blocking block 18 will extend out of the telescopic hole 20, and the arc groove 19 on the blocking block 18 will obstruct the pressing rod 14, thereby achieving the effect of emergency braking.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A special angle auxiliary boom for wind turbine hub mounting, comprising a main boom (1) and a wind turbine auxiliary boom (4), wherein the main boom (1) and the wind turbine auxiliary boom (4) are connected by a first transition section (2) and a second transition section (3) that rotate relative to each other, characterized in that, The wind turbine auxiliary boom (4) is equipped with a crane (9), and the crane (9) is pulled by a second traction rope (10) for lifting the wind turbine hub. The second transition section (3) is vertically fixed with a support plate (12). The main boom (1) and the wind turbine auxiliary boom (4) are both two quadrilateral frames, and the two quadrilateral frames are equipped with multiple internal support brackets (13) for reinforcement and fixation. The main boom (1) and the support plate (12) are respectively equipped with a first fixed pulley (6) and a second fixed pulley (7). The main boom (1) is equipped with an electric winding machine (5). Furthermore, a first traction rope (8) is provided between the electric winding machine (5) and the hoist (9), which is wound around the first fixed pulley (6) and the second fixed pulley (7). The first fixed pulley (6) and the second fixed pulley (7) are respectively set on the main boom (1) and the support plate (12) through the first roller frame and the second roller frame (27). The support plate (12) is provided with an emergency braking mechanism to prevent the wind turbine auxiliary boom (4) from swinging down rapidly. The first transition section (2) is provided with a brake auxiliary rod that slides on the support plate (12). The emergency braking mechanism includes a rod that is opened on the support plate (12). The support plate (12) has an active cavity, a bottom support plate (17) that slides within the active cavity, multiple blocking blocks (18) linearly arranged on the bottom support plate (17), and a group of limiting holes formed on the surface of the support plate (12) and communicating with the active cavity. The group of limiting holes includes multiple telescopic holes (20) linearly arranged, and the distance between two adjacent telescopic holes (20) is the same as the thickness of the blocking block (18). The blocking block (18) has an arc-shaped groove (19) on the side facing the second fixed pulley (7). The second roller frame (27) has a through-hole. The telescopic rod (25) of the through support plate (12) is fitted with a second tension spring (26) for resetting the second fixed pulley (7) on the outer wall of the telescopic rod (25). A pressing plate (24) is provided at the end of the telescopic rod (25) away from the second fixed pulley (7), and a U-shaped limiting plate (21) for blocking the pressing plate (24) is provided in the movable cavity. A first tension spring (23) is provided between the bottom support plate (17) and the U-shaped limiting plate (21). A horizontal plate (22) that abuts against the pressing plate (24) is provided on the bottom support plate (17).

2. The special angle auxiliary boom for wind turbine hub mounting according to claim 1, characterized in that, The first transition section (2) and the second transition section (3) are respectively fixed at the opposite ends of the main boom (1) and the wind power auxiliary boom (4). The second transition section (3) is fixed with a second rotating shaft (28), and the first transition section (2) is provided with a rotating hole. The first transition section (2) and the second transition section (3) are rotatably connected through the second rotating shaft (28) and the rotating hole. The first transition section (2) is provided with a trigger buckle mechanism. The wind power auxiliary boom (4) is provided with a pressing elastic rod (11) for sensing the pressure of the second traction rope (10).

3. The special angle auxiliary boom for wind turbine hub mounting according to claim 2, characterized in that, The trigger latching mechanism includes a solenoid coil (31) set in the first transition section (2), a first power supply group and a second power supply group. The positive and negative poles of the first power supply group and the second power supply group are connected to the head and tail of the solenoid coil (31), and a fixing hole communicating with the rotating hole. The solenoid coil (31) is fixed in the fixing hole by the top plate (32). The second rotating shaft (28) has multiple toothed grooves (29) circumferentially opened, and a downward pressing toothed plate (30) slides in the fixing hole. The bottom of the downward pressing toothed plate (30) has a toothed block group that matches the toothed grooves (29).

4. The special angle auxiliary boom for wind turbine hub mounting according to claim 2, characterized in that, The pressing elastic rod (11) is supported on the wind turbine arm (4) by the connecting bracket (33). The wind turbine arm (4) has metal contacts (34) on two adjacent quadrilateral frames respectively, and the two adjacent metal contacts (34) are connected to each other by the pressing elastic rod (11) located on the connecting bracket (33).

5. The special angle auxiliary boom for wind turbine hub mounting according to claim 1, characterized in that, The brake assist rod includes a pressure rod (14) that slides on the surface of the support plate (12), a first rotating shaft (16) that is rotatably disposed on the first transition section (2), and a connecting plate (15) for connecting the pressure rod (14) and the first rotating shaft (16), wherein the pressure rod (14) slides on the upper surface of the support plate (12).

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