A kind of wind power generation blade precast is with spraying device

Abstract

This invention relates to the field of molten coating material spraying technology, and discloses a spraying device for prefabricated wind turbine blades. The device includes a guide rail and a CNC slide mounted on the guide rail. A ring-shaped rail frame, a transmission box, and a spraying machine body are fixed on the CNC slide. A toothed ring is rotatably connected to the inner side of the ring-shaped rail frame. The CNC slide also includes a spraying assembly, a speed control assembly, and a pressure control assembly. This invention, by setting up a ring-shaped rail frame that can move along the wind turbine blade and installing two sets of reciprocating spraying assemblies on the ring-shaped rail frame, facilitates three-dimensional, all-around spraying of the blade. This is more efficient than manual spraying and less costly than robotic spraying. The speed control assembly helps control the spraying assembly to increase its moving speed when passing the blade edges, thereby avoiding excessive spraying at the edges and preventing excessive thickness. Furthermore, increasing the moving speed also improves spraying efficiency and reduces paint loss.

Description

Technical Field

[0001] This invention relates to the field of molten coating material spraying technology, specifically to a spraying device for prefabricating wind turbine blades. Background Technology

[0002] Metal spraying is a material protection technology that uses a high-speed stream of molten metal particles to spray onto a substrate surface to create a coating. The most commonly used metals are zinc, aluminum, and aluminum-zinc alloys, primarily for protecting large steel structural components. The principle of common metal thermal spraying equipment is to utilize the heat source of oxyacetylene combustion to heat and melt spray wire or powder continuously and uniformly fed into the flame. This melted powder is then atomized into microparticles by high-pressure gas and directly sprayed onto the pre-treated workpiece surface, continuously depositing to form a metal or alloy coating. This process is one of the most commonly used thermal spraying technologies in China, primarily for spraying zinc, aluminum, and zinc-aluminum alloys for long-term corrosion protection of large steel structural components. Wind power equipment requires a service life of several decades, thus demanding high corrosion resistance. During manufacturing, metal thermal spraying technology is often used to coat the equipment surface with a metallic anti-corrosion coating.

[0003] Chinese patent CN108193161B discloses an apparatus suitable for spraying large-area planar metal coatings. This apparatus, by setting up a spraying carriage that can move along the X and Y axes, can achieve large-area spraying. However, this apparatus can only be adapted to spraying large planar workpieces or small three-dimensional workpieces, which is not very versatile. For wind turbine blades in wind power equipment, which have a large surface area and are curved, manual spraying would be labor-intensive and time-consuming. Moreover, the spraying quality is highly dependent on the operator's skill. In addition, existing technologies also have a scheme in which two sets of symmetrically arranged sliding robots work with spray guns to achieve spraying. This thermal spraying equipment is expensive, and because the blades are flat and the edges are small, it is difficult to control the spraying thickness at the blade edges, which can easily result in excessive thickness at the edges and high material consumption. Therefore, there is an urgent need for a three-dimensional high-quality spraying device suitable for large workpieces such as wind turbine blades.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a spraying device for prefabricated wind turbine blades, which has the advantages of high spraying quality, fast spraying efficiency, and high paint utilization. It solves the problems of high workload when manually spraying wind turbine blades, and the difficulty of existing thermal spraying equipment in meeting the requirements of three-dimensional spraying of wind turbine blades and controlling the spraying thickness at the spraying edge, resulting in poor spraying quality and high material and energy consumption.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a spraying device for prefabricating wind turbine blades, comprising a guide rail and a CNC slide block slidably mounted on the guide rail, wherein an annular rail frame, a transmission box and a spraying machine body are fixed on the CNC slide block, and a toothed ring is rotatably connected to the inner side of the annular rail frame; the CNC slide block is also provided with a spraying component, a speed control component and a pressure control component.

[0007] The spraying assembly is configured as two sets, which are symmetrically arranged and movably installed inside the annular rail frame. Both sets of spraying assemblies are used to spray coating on the surface of the workpiece.

[0008] The speed control component is installed in the transmission box and is connected to the spraying component in a transmission. The speed control component is used to drive the spraying component to move and control the speed of the spraying component.

[0009] The pressure control component is installed in the transmission box and is connected to the spraying component for transmission. The pressure control component is used to control the spraying pressure of the spraying component.

[0010] The ring-shaped rail frame is placed outside the workpiece. When the speed control component is running, it drives two sets of spraying components to reciprocate around the workpiece, while the spraying components spray the workpiece surface.

[0011] The speed control component also increases the speed of the spraying component when it passes the edge of the workpiece during transportation, thereby reducing the amount of coating at the edge. At the same time, the speed control component drives the pressure control component to operate, so that the spraying pressure of the spraying component increases when it sprays the bottom edge of the workpiece.

[0012] Preferably, the spraying assembly includes a mounting base, which is fixed to the inner wall of the toothed ring. A scissor lift frame is fixed on the mounting base, and a mounting plate is fixed to the top of the scissor lift frame. A spray gun head is provided on the mounting plate.

[0013] Preferably, a first motor is also fixed on the mounting plate, and the output shaft of the first motor is fixed to the spray gun head.

[0014] Preferably, the bottom of the annular rail frame is provided with an opening, the opening corresponds to the position of the gear ring, a drive gear is provided in the opening, the drive gear meshes with the gear ring, a support seat is provided on one side of the drive gear, the support seat is fixed to the inner wall of the transmission box, a main shaft is rotatably connected to the support seat, and one end of the main shaft is fixed to the drive gear.

[0015] Preferably, the speed control assembly includes a drive shaft and a reduction gearbox. The reduction gearbox is fixed to the side wall of the transmission box. A second motor is fixedly mounted on the input shaft of the reduction gearbox. The output shaft of the reduction gearbox extends into the transmission box and is fixed with a conical friction roller. Both ends of the conical friction roller are rotatably connected to the transmission box. A cylindrical friction roller is slidably mounted on the drive shaft. The cylindrical friction roller is in contact with the conical friction roller. One end of the drive shaft is rotatably connected to the transmission box, and the other end of the drive shaft is connected to the main shaft through a universal joint.

[0016] Preferably, a strip-shaped convex rail is fixed on the drive shaft, and the inner wall of the cylindrical friction roller is provided with a groove that matches the strip-shaped convex rail.

[0017] Preferably, the speed control assembly further includes a slide rail, a base shaft, and a cam divider. The slide rail is fixed at both ends to the side wall of the transmission box and a support base, respectively. A push rack is slidably connected inside the slide rail. A base block is fixedly connected to one end of the push rack. Two push plates are fixedly fixed on the base block, symmetrically distributed on both sides of the cylindrical friction roller. The cam divider is fixed to the inner wall of the transmission box. A third motor is fixedly installed on the input shaft of the cam divider. A drive gear is fixed to the output shaft of the cam divider. One end of the base shaft is fixed to the inner wall of the transmission box. A disc and a driven gear are rotatably connected to the base shaft. The driven gear is fixed to the disc and meshes with the drive gear. A push rod is rotatably connected to the edge of the disc, and the end of the push rod away from the disc is rotatably connected to the base block.

[0018] Preferably, the pressure control component includes an air pipe and a transmission rack. The two ends of the air pipe are connected to the spray gun head and the main body of the spraying machine, respectively. A pressure regulating valve is fixed on the air pipe, and an adjusting gear is fixed on the valve stem of the pressure regulating valve. The transmission rack is slidably connected to the inner wall of the transmission box, and the top end of the transmission rack extends to the outside of the transmission box and meshes with the adjusting gear. The transmission rack is connected to the push rack through a transmission component.

[0019] Preferably, the transmission component includes a bearing housing, which is fixed on a slide rail. A short shaft is rotatably connected to the bearing housing, and a first transmission gear and a second transmission gear are fixed at both ends of the short shaft, respectively. The first transmission gear meshes with a push rack, and the second transmission gear meshes with a transmission rack.

[0020] Compared with the prior art, the present invention provides a spraying device for prefabrication of wind turbine blades, which has the following beneficial effects:

[0021] 1. This type of prefabricated spraying device for wind turbine blades, by setting up a ring-shaped track frame that can move along the wind turbine blade, and setting up two sets of reciprocating spraying components on the ring-shaped track frame, is conducive to achieving three-dimensional all-round spraying of the blade. It is more efficient than manual spraying and less expensive than robot spraying. By setting up a speed control component, it is beneficial to control the movement speed of the spraying components when passing the blade edge, thereby avoiding excessive spraying at the edge and causing excessive thickness, reducing paint loss, and increasing the movement speed can also improve the spraying efficiency.

[0022] 2. This type of prefabrication spraying device for wind turbine blades, by setting a pressure control component, can increase the spraying pressure when the spraying component moves to the bottom edge of the blade, thereby compensating for some of the loss caused by the falling of molten material due to gravity, ensuring a more uniform spraying thickness, and further improving the spraying quality. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a spray coating device for prefabricating wind turbine blades according to the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the transmission box of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the spraying assembly of the present invention;

[0026] Figure 4 This is a schematic diagram of the speed control component of the present invention;

[0027] Figure 5 For the present invention Figure 4 Enlarged view of part A;

[0028] Figure 6 This is a schematic diagram of the structure of the base block of the present invention;

[0029] Figure 7 For the present invention Figure 6 Enlarged view of part B;

[0030] Figure 8 This is a cross-sectional view of the transmission box of the present invention;

[0031] Figure 9 For the present invention Figure 8 Enlarged view of part C.

[0032] In the diagram: 1. Guide rail; 2. CNC slide; 3. Circular rail frame; 4. Transmission box; 5. Main body of the spraying machine; 6. Spraying assembly; 61. Mounting base; 62. Scissor lift frame; 63. Mounting plate; 64. Spray gun head; 65. First motor; 7. Speed ​​control assembly; 701. Drive shaft; 702. Gearbox; 703. Second motor; 704. Conical friction roller; 705. Cylindrical friction roller; 706. Universal joint; 707. Strip rail; 708. Slide rail; 709. Base shaft; 710. Cam divider 711. Push rack; 712. Base block; 713. Push plate; 714. Third motor; 715. Drive gear; 716. Disc; 717. Driven gear; 718. Push rod; 8. Pressure control assembly; 801. Air pipe; 802. Transmission rack; 803. Pressure regulating valve; 804. Adjusting gear; 805. Bearing seat; 806. Short shaft; 807. First transmission gear; 808. Second transmission gear; 9. Gear ring; 10. Opening; 11. Drive gear; 12. Support seat; 13. Main shaft. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a spraying device for prefabrication of wind turbine blades.

[0035] Please see Figures 1-2 A prefabrication spraying device for wind turbine blades includes a guide rail 1 and a CNC slide block 2 slidably mounted on the guide rail 1. The CNC slide block 2 is fixed with an annular rail frame 3, a transmission box 4 and a spraying machine body 5. A toothed ring 9 is rotatably connected to the inner side of the annular rail frame 3. The CNC slide block 2 is also provided with a spraying component 6, a speed control component 7 and a pressure control component 8.

[0036] The spraying assembly 6 is configured as two sets, the two sets of spraying assembly 6 are symmetrically arranged and movably installed inside the annular rail frame 3, and both sets of spraying assembly 6 are used to spray the workpiece surface.

[0037] The speed control component 7 is installed in the transmission box 4 and is connected to the spraying component 6 in a transmission manner. The speed control component 7 is used to drive the spraying component 6 to move and control the speed of the spraying component 6.

[0038] The pressure control component 8 is installed in the transmission box 4 and is connected to the spraying component 6 in a transmission manner. The pressure control component 8 is used to control the spraying pressure of the spraying component 6.

[0039] The ring rail frame 3 is placed outside the workpiece. When the speed control component 7 is running, it drives the two sets of spraying components 6 to reciprocate around the workpiece. At the same time, the spraying components 6 spray the workpiece surface.

[0040] During transport, the speed control component 7 also increases the speed of the spraying component 6 when it passes the edge of the workpiece, thereby reducing the amount of coating at the edge. At the same time, the speed control component 7 drives the pressure control component 8 to operate, thereby increasing the spraying pressure of the spraying component 6 when spraying the bottom edge of the workpiece.

[0041] Among them, the CNC slide 2 can slide along the guide rail 1 to drive the spraying component 6 on the annular rail frame 3 to move. The spraying machine body 5 is the same as the prior art. Both sets of spraying components 6 are connected to the spraying machine body 5 through pipes. One of the spraying components 6 can reciprocate along the upper part of the annular rail frame 3, and the other spraying component 6 can reciprocate along the lower part of the annular rail frame 3. The diameter of the annular rail frame 3 is larger than the maximum diameter of the blade to be processed.

[0042] In use, the CNC slide 2 slides along the guide rail 1 and is fitted onto the outside of the wind turbine blade. The main body 5 of the spraying machine and the spraying component 6 are started to spray the blade surface. At the same time, the speed control component 7 is operated. The speed control component 7 drives the two spraying components 6 to rotate back and forth along the ring rail 3, thereby driving the top spraying component 6 to spray around the upper half of the blade and the bottom spraying component 6 to spray around the lower half of the blade. In addition, the speed control component 7 also increases the moving speed of the spraying component 6 when it passes the edge positions of the top and bottom of the blade to avoid spraying too much paint in the small area of ​​the edge. When the speed control component 7 is running, it drives the pressure control component 8. The pressure control component 8 adjusts the spraying pressure of the bottom spraying component 6, so that the pressure of the spraying component 6 increases when it passes the bottom edge of the blade, thereby compensating for the loss caused by the paint resisting gravity. At the same time, the CNC slide 2 slides along the guide rail 1 to perform gradual circumferential spraying on various positions of the wind turbine blade.

[0043] By setting up a ring-shaped track 3 that can move along the wind turbine blade, and installing two sets of reciprocating spraying components 6 on the ring-shaped track 3, it is beneficial to achieve three-dimensional all-round spraying of the blade, which is more efficient than manual spraying. By setting up a speed control component 7, it is beneficial to control the movement speed of the spraying component 6 when passing the blade edge, thereby avoiding excessive spraying at the edge and causing excessive thickness. Increasing the movement speed can also improve the spraying efficiency and reduce paint loss. By setting up a pressure control component 8, the spraying pressure of the spraying component 6 can be increased when it moves to the bottom edge of the blade, thereby compensating for some of the loss caused by the falling of molten material due to gravity, so that the spraying thickness at the bottom of the blade is consistent with the spraying thickness at the top, making it more uniform.

[0044] Further, see Figure 3 The spraying assembly 6 includes a mounting base 61, which is fixed to the inner wall of the toothed ring 9. A scissor lift frame 62 is fixed on the mounting base 61. A mounting plate 63 is fixed to the top of the scissor lift frame 62. A spray gun head 64 is provided on the mounting plate 63. A first motor 65 is also fixed on the mounting plate 63. The output shaft of the first motor 65 is fixed to the spray gun head 64.

[0045] Among them, the spray gun head 64 is connected to the spraying machine body 5. When the spraying machine body 5 is running, the paint is sprayed out through the spray gun head 64. The scissor lift frame 62 is existing technology. When in use, the extension and retraction of the spray gun head 64 can be controlled by the scissor lift frame 62. When the first motor 65 is running, it can drive the spray gun head 64 to rotate.

[0046] By setting a scissor lift frame 62, the distance between the spray gun head 64 and the blade surface can be adjusted, improving applicability. The first motor 65 can drive the spray gun head 64 to rotate at a certain angle, thereby adjusting the spraying angle and further improving applicability.

[0047] Further, see Figure 4 and Figure 5The annular track frame 3 has an opening 10 at its bottom, which corresponds to the position of the gear ring 9. A drive gear 11 is installed inside the opening 10 and meshes with the gear ring 9. A support seat 12 is provided on one side of the drive gear 11 and is fixed to the inner wall of the transmission box 4. A main shaft 13 is rotatably connected to the support seat 12, and one end of the main shaft 13 is fixed to the drive gear 11. The speed control assembly 7 includes a drive shaft 701 and a reduction gearbox 702. The reduction gearbox 702 is fixed to the side wall of the transmission box 4, and a second motor 7 is fixedly installed on the input shaft of the reduction gearbox 702. 03, the output shaft of the reduction gearbox 702 extends into the transmission box 4 and is fixed with a conical friction roller 704. Both ends of the conical friction roller 704 are rotatably connected to the transmission box 4. A cylindrical friction roller 705 is slidably mounted on the drive shaft 701. A strip-shaped convex rail 707 is fixed on the drive shaft 701. The inner wall of the cylindrical friction roller 705 is provided with a groove that matches the strip-shaped convex rail 707. The cylindrical friction roller 705 and the conical friction roller 704 are in contact. One end of the drive shaft 701 is rotatably connected to the transmission box 4, and the other end of the drive shaft 701 is connected to the main shaft 13 through a universal joint 706.

[0048] Among them, the conical friction roller 704 and the cylindrical friction roller 705 are in contact with each other and can be transmitted by friction. The cylindrical friction roller 705 is slidably installed by setting the strip convex rail 707 and the groove. The second motor 703 is set as a servo motor and is set to alternate forward and reverse rotation when running.

[0049] In use, when the second motor 703 is running, it drives the reduction gearbox 702. The output shaft of the reduction gearbox 702 drives the conical friction roller 704 to rotate. When the conical friction roller 704 rotates, it drives the cylindrical friction roller 705 to rotate. When the cylindrical friction roller 705 rotates, it drives the drive shaft 701 to rotate. When the drive shaft 701 rotates, it drives the main shaft 13 to rotate through the universal joint 706. When the main shaft 13 rotates, it drives the drive gear 11 to rotate. When the drive gear 11 rotates, it drives the gear ring 9 to rotate, which in turn drives the spraying component 6 inside the gear ring 9 to rotate. Since the second motor 703 rotates alternately in both forward and reverse directions, the spraying component 6 can rotate alternately in counterclockwise and clockwise directions. The unidirectional rotation path is exactly half of the gear ring 9.

[0050] By setting a second motor 703, two sets of spraying components 6 can be driven to rotate alternately in both directions, which is beneficial for spraying the blade surface in a full-angle three-dimensional manner.

[0051] Further, see Figures 6-9The speed control component 7 further includes a slide rail 708, a base shaft 709, and a cam divider 710. The two ends of the slide rail 708 are fixed to the side wall of the transmission box 4 and the support base 12, respectively. A push rack 711 is slidably connected inside the slide rail 708. One end of the push rack 711 is fixedly connected to a base block 712. Two push plates 713 are fixed on the base block 712, symmetrically distributed on both sides of the cylindrical friction roller 705. The cam divider 710 is fixed to the inner wall of the transmission box 4. A third motor 714 is fixedly mounted on the input shaft of the wheel divider 710, and a drive gear 715 is fixed on the output shaft of the cam divider 710. One end of the base shaft 709 is fixed to the inner wall of the transmission box 4. A disc 716 and a driven gear 717 are rotatably connected to the base shaft 709. The driven gear 717 is fixed to the disc 716 and meshes with the drive gear 715. A push rod 718 is rotatably connected to the edge of the disc 716. The end of the push rod 718 away from the disc 716 is rotatably connected to the base block 712.

[0052] Among them, the cam divider 710 is the prior art, and both push plates 713 are provided with notches, which are matched with the position of the drive shaft 701.

[0053] When in use, the third motor 714 drives the cam divider 710, which in turn drives the drive gear 715 to rotate intermittently. When the drive gear 715 rotates intermittently, it drives the driven gear 717 to rotate intermittently. When the driven gear 717 rotates intermittently, it drives the disc 716 to rotate intermittently. When the disc 716 rotates intermittently, it can push the push rod 718 to move intermittently, which in turn drives the base block 712 and the push plate 713 to rotate intermittently. When the push plate 713 rotates intermittently, it can drive the cylindrical friction roller 705 to reciprocate intermittently. When the cylindrical friction roller 705 reciprocates, it can change the transmission ratio, which just causes the speed of the spraying assembly 6 to increase briefly when it rotates to the edge of the bottom of the blade.

[0054] By setting a third motor 714, the transmission ratio can be changed when the third motor 714 is running, so that the speed of the spraying assembly 6 is briefly increased when it rotates to the edge at the bottom of the blade. Since the molten material has diffusion characteristics during spraying, and the area at the edge is small, the molten material adhering to the unit area at the edge is thicker when the unit spraying amount is constant. By increasing the speed, the total amount of molten material adhering to the edge can be reduced, thereby making the thickness of the molten material per unit area closer to the thickness of other parts of the blade, thus achieving the purpose of uniform spraying, avoiding excessively thick spraying at the edge and reducing losses. At the same time, the brief increase in speed shortens the spraying cycle and improves the spraying efficiency.

[0055] Further, see Figures 8-9The pressure control component 8 includes an air pipe 801 and a transmission rack 802. The two ends of the air pipe 801 are connected to the spray gun head 64 and the spraying machine body 5, respectively. A pressure regulating valve 803 is fixed on the air pipe 801. An adjusting gear 804 is fixed on the valve stem of the pressure regulating valve 803. The transmission rack 802 is slidably connected to the inner wall of the transmission box 4. The top end of the transmission rack 802 extends to the outside of the transmission box 4 and meshes with the adjusting gear 804. The transmission rack 802 is connected to the push rack 711 through a transmission component. The transmission component includes a bearing seat 805, which is fixed on a slide rail 708. A short shaft 806 is rotatably connected to the bearing seat 805. A first transmission gear 807 and a second transmission gear 808 are fixed at both ends of the short shaft 806, respectively. The first transmission gear 807 meshes with the push rack 711, and the second transmission gear 808 meshes with the transmission rack 802.

[0056] Among them, the pressure regulating valve 803 is set on the air pipe 801 that connects the pressure control component 8 at the bottom to the main body 5 of the spraying machine. In actual application, the spraying pressure of the top spraying component 6 is fixed, and the pressure control component 8 only regulates the spraying pressure of the bottom spraying component 6.

[0057] In use, when the base block 712 reciprocates, it drives the push rack 711 to slide back and forth. When the rack slides back and forth, it drives the first transmission gear 807 to rotate back and forth. The first transmission gear 807 drives the short shaft 806 and the second transmission gear 808 to rotate back and forth. The second transmission gear 808 drives the transmission rack 802 to move back and forth. The transmission rack 802 drives the adjusting gear 804 on the pressure regulating valve 803 to rotate back and forth, thereby adjusting the spraying pressure.

[0058] By setting up the pressure control component 8, the spraying pressure of the spraying component 6 is briefly increased when the spraying component 6 moves to the bottom edge of the blade, thereby compensating for the partial loss of paint caused by gravity, ensuring the spraying thickness at the bottom of the blade, and improving the spraying quality.

[0059] Working principle: During use, the CNC slide 2 slides along the guide rail 1 and is fitted onto the outside of the wind turbine blade. The main body 5 of the spraying machine is started, and the blade surface is sprayed with coating through the spray gun head 64. Simultaneously, the second motor 703 and the third motor 714 are started. When the second motor 703 runs, it drives the reduction gearbox 702. The output shaft of the reduction gearbox 702 drives the conical friction roller 704 to rotate. When the conical friction roller 704 rotates, it drives the cylindrical friction roller 705 to rotate. When the cylindrical friction roller 705 rotates, it drives the drive shaft 701 to rotate. When the drive shaft 701 rotates, it drives the main shaft 13 to rotate through the universal joint 706. The rotation of the main shaft 13 drives the drive gear 11 to rotate. When the drive gear 11 rotates, it drives the gear ring 9 to rotate, which in turn drives the coating assembly 6 inside the gear ring 9 to rotate. Because the second motor 703 operates in alternating forward and reverse directions... The coating assembly 6 can rotate alternately counterclockwise and clockwise, with the unidirectional rotation path being exactly half of the gear ring 9. When the third motor 714 is running, it drives the cam divider 710. The cam divider 710 drives the drive gear 715 to rotate intermittently. When the drive gear 715 rotates intermittently, it drives the driven gear 717 to rotate intermittently. When the driven gear 717 rotates intermittently, it drives the disc 716 to rotate intermittently. When the disc 716 rotates intermittently, it can push the push rod 718 to move intermittently, which in turn drives the base block 712 and the push plate 713 to rotate intermittently. When the push plate 713 rotates intermittently, it can drive the cylindrical friction roller 705 to reciprocate intermittently. When the cylindrical friction roller 705 reciprocates, it can change the transmission ratio, which just causes the speed of the coating assembly 6 to increase briefly when it rotates to the edge of the bottom of the blade.

[0060] When the base block 712 reciprocates, it drives the push rack 711 to slide back and forth. When the rack slides back and forth, it drives the first transmission gear 807 to rotate back and forth. The first transmission gear 807 drives the short shaft 806 and the second transmission gear 808 to rotate back and forth. The second transmission gear 808 drives the transmission rack 802 to move back and forth. The transmission rack 802 drives the adjusting gear 804 on the pressure regulating valve 803 to rotate back and forth, so that when the spraying assembly 6 moves to the bottom edge of the blade, the spraying pressure of the spraying assembly 6 increases briefly.

[0061] By setting up a ring-shaped track 3 that can move along the wind turbine blade, and installing two sets of reciprocating spraying components 6 on the ring-shaped track 3, it is beneficial to achieve three-dimensional all-round spraying of the blade, which is more efficient than manual spraying. By setting up a speed control component 7, it is beneficial to control the movement speed of the spraying component 6 when passing the blade edge, thereby avoiding excessive spraying at the edge and causing excessive thickness. Increasing the movement speed can also improve the spraying efficiency and reduce paint loss. By setting up a pressure control component 8, the spraying pressure of the spraying component 6 can be increased when it moves to the bottom edge of the blade, thereby compensating for the paint loss caused by gravity, so that the spraying thickness at the bottom of the blade is consistent with the spraying thickness at the top, making it more uniform.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spraying device for prefabricating wind turbine blades, comprising a guide rail (1) and a CNC slide block (2) slidably mounted on the guide rail (1), characterized in that: The CNC slide (2) is fixed with a ring rail frame (3), a transmission box (4) and a spraying machine body (5). A toothed ring (9) is rotatably connected to the inner side of the ring rail frame (3). The CNC slide (2) is also equipped with a spraying assembly (6), a speed control assembly (7) and a pressure control assembly (8). The spraying assembly (6) is set in two groups. The two groups of spraying assemblies (6) are symmetrically arranged and movably installed inside the ring rail frame (3). Both groups of spraying assemblies (6) are used to spray the workpiece surface. The speed control component (7) is installed in the transmission box (4) and is connected to the spraying component (6) in a transmission connection. The speed control component (7) is used to drive the spraying component (6) to move and control the speed of the spraying component (6). The pressure control component (8) is installed in the transmission box (4) and is connected to the spraying component (6) in a transmission connection. The pressure control component (8) is used to control the spraying pressure of the spraying component (6). The ring rail frame (3) is placed outside the workpiece. When the speed control component (7) is running, it drives the two sets of spraying components (6) to reciprocate around the workpiece. At the same time, the spraying components (6) spray the workpiece surface. The speed control component (7) also increases the speed of the spraying component (6) when it passes the edge of the workpiece during transportation, thereby reducing the amount of coating at the edge. At the same time, the speed control component (7) drives the pressure control component (8) to operate, thereby increasing the spraying pressure when the spraying component (6) sprays the bottom edge of the workpiece. The bottom of the annular rail frame (3) is provided with an opening (10), the opening (10) corresponds to the position of the gear ring (9), a drive gear (11) is provided in the opening (10), the drive gear (11) meshes with the gear ring (9), a support seat (12) is provided on one side of the drive gear (11), the support seat (12) is fixed to the inner wall of the transmission box (4), a main shaft (13) is rotatably connected on the support seat (12), and one end of the main shaft (13) is fixed to the drive gear (11); The speed control assembly (7) includes a drive shaft (701) and a reduction gearbox (702). The reduction gearbox (702) is fixed to the side wall of the transmission box (4). A second motor (703) is fixedly installed on the input shaft of the reduction gearbox (702). The output shaft of the reduction gearbox (702) extends into the transmission box (4) and is fixed with a conical friction roller (704). Both ends of the conical friction roller (704) are rotatably connected to the transmission box (4). A cylindrical friction roller (705) is slidably installed on the drive shaft (701). The cylindrical friction roller (705) is in contact with the conical friction roller (704). One end of the drive shaft (701) is rotatably connected to the transmission box (4). The other end of the drive shaft (701) is connected to the main shaft (13) through a universal joint (706). A strip-shaped convex rail (707) is fixed on the drive shaft (701), and a groove matching the strip-shaped convex rail (707) is provided on the inner wall of the cylindrical friction roller (705). The speed control assembly (7) further includes a slide rail (708), a base shaft (709), and a cam divider (710). The two ends of the slide rail (708) are fixed to the side wall of the transmission box (4) and the support seat (12), respectively. A push rack (711) is slidably connected inside the slide rail (708). One end of the push rack (711) is fixedly connected to a base block (712). Two push plates (713) are fixed on the base block (712). The two push plates (713) are symmetrically distributed on both sides of the cylindrical friction roller (705). The cam divider (710) is fixed to the inner wall of the transmission box (4). A third motor (714) is fixedly installed on the input shaft of the wheel divider (710), and a drive gear (715) is fixed on the output shaft of the cam divider (710). One end of the base shaft (709) is fixed to the inner wall of the transmission box (4). A disc (716) and a driven gear (717) are rotatably connected on the base shaft (709). The driven gear (717) is fixed to the disc (716) and meshes with the drive gear (715). A push rod (718) is rotatably connected to the edge of the disc (716). The end of the push rod (718) away from the disc (716) is rotatably connected to the base block (712). The pressure control assembly (8) includes an air pipe (801) and a transmission rack (802). The two ends of the air pipe (801) are connected to the spray gun head (64) and the spraying machine body (5) respectively. A pressure regulating valve (803) is fixed on the air pipe (801). An adjusting gear (804) is fixed on the valve stem of the pressure regulating valve (803). The transmission rack (802) is slidably connected to the inner wall of the transmission box (4). The top end of the transmission rack (802) extends through to the outside of the transmission box (4) and meshes with the adjusting gear (804). The transmission rack (802) is connected to the push rack (711) through a transmission component. The transmission component includes a bearing housing (805), which is fixed on a slide rail (708). A short shaft (806) is rotatably connected to the bearing housing (805). A first transmission gear (807) and a second transmission gear (808) are fixed at both ends of the short shaft (806). The first transmission gear (807) meshes with a push rack (711), and the second transmission gear (808) meshes with a transmission rack (802).

2. The spray coating device for prefabrication of wind turbine blades according to claim 1, characterized in that: The spraying assembly (6) includes a mounting base (61), which is fixed to the inner wall of the toothed ring (9). A scissor lift frame (62) is fixed on the mounting base (61), and a mounting plate (63) is fixed on the top of the scissor lift frame (62). A spray gun head (64) is provided on the mounting plate (63).

3. The spray coating device for prefabrication of wind turbine blades according to claim 2, characterized in that: The mounting plate (63) is also fixed with a first motor (65), and the output shaft of the first motor (65) is fixed with the spray gun head (64).

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