Spraying device for graphene ceramic gold coating of water turbine

Abstract

The invention provides a water turbine graphene ceramic coating spraying device, and relates to the technical field of spraying equipment.The water turbine graphene ceramic coating spraying device comprises a first moving trolley and a second moving trolley, and the first moving trolley and the second moving trolley are arranged on the side wall of one side of the same blade of a water turbine in an adsorption mode and can move along the edge path in the length direction of the blade; the spraying pipe is arranged between the first moving vehicle and the second moving vehicle in a striding mode and located on the other side of the blade, the length of the spraying pipe can be automatically adjusted in the process that the spraying pipe moves in the length direction of the blade along with the first moving vehicle and the second moving vehicle, and a plurality of spraying openings are formed in the spraying pipe in the length direction of the spraying pipe; and a first switching member and a second switching member. Continuous spraying of the whole blade can be completed in the one-time moving process of the spraying device in the length direction of the blade, repeated reciprocating or segmented supplementary spraying is not needed, and therefore the spraying efficiency is improved, it is guaranteed that the spraying process is stable, and the overall spraying quality and the coating consistency of the blade are improved.

Description

Technical Field

[0001] This invention relates to the field of spraying equipment technology, and more specifically, to a spraying device for graphene ceramic gold coating on a water turbine. Background Technology

[0002] A water turbine impeller typically consists of a lower ring, an upper crown, and multiple blades. Among these, the blades, as key components that directly interact with water flow, are large in size and subject to complex stresses, placing the highest demands on the wear resistance, adhesion, and film quality of the surface coating. Compared to connecting parts such as the lower ring and upper crown, the coating quality of the turbine blades, especially the blade body area, has a more significant impact on the overall performance of the turbine. Therefore, in the process of applying functional coatings such as graphene ceramic coatings, the blades become the most challenging part to coat and require the highest level of quality control.

[0003] In actual spraying operations, due to the large overall size of turbine blades and the presence of adjacent structures obstructing the connection areas between their ends and the lower ring or upper crown, as well as the narrow spraying space, the entire blade typically requires multiple reciprocating spraying operations along a predetermined path, either manually or using a robotic arm. The inventors discovered during actual construction that, under this spraying method, the spray gun tends to repeatedly pass over certain areas of the blade, resulting in overlapping spraying of already coated areas. This leads to localized coating buildup, causing drips, uneven thickness, and other issues, affecting the overall forming quality and consistency of the coating on the blade surface. Summary of the Invention

[0004] The purpose of this invention is to provide a graphene ceramic coating spraying device for water turbines, which can complete the continuous spraying of the entire blade in a single movement along the blade length direction without repeated back-and-forth or segmented respraying, thereby improving spraying efficiency, ensuring the stability of the spraying process, and improving the overall spraying quality and coating consistency of the blade.

[0005] This invention is achieved through the following technical solution:

[0006] A graphene ceramic coating spraying device for a water turbine includes:

[0007] The first mobile vehicle and the second mobile vehicle are respectively attached to one side wall of the same blade of the water turbine and can move along the edge path along the length direction of the blade.

[0008] A spray pipe is provided between the first moving vehicle and the second moving vehicle and is located on the other side of the blade. The spray pipe can automatically adjust its length as it moves along the length direction of the blade with the first moving vehicle and the second moving vehicle. The spray pipe is provided with multiple spray nozzles along its length direction.

[0009] A first switch is disposed on the spray pipe and is used to gradually open or close the spray nozzle during the automatic length adjustment process of the spray pipe, so that only the spray nozzle directly facing the blade is in the open state.

[0010] The second switch, which is disposed on the spray pipe, is used to gradually close the spray nozzle from the side closer to the first moving vehicle to the side closer to the second moving vehicle during the process of the second moving vehicle continuing to move along the long side of the blade after the first moving vehicle has completed its movement along the short side path of the blade and stopped.

[0011] Furthermore, the spray pipe has a first state and a second state that can be switched between each other, wherein:

[0012] When the spray pipe is in the first state, the spray pipe is in the initial position, and the spray nozzle is inclined and faces the root connection area on one side of the blade length direction.

[0013] When the spray pipe is in the second state, the first moving vehicle and the second moving vehicle move to the other side of the blade length direction, and the spray pipe automatically rotates along its axial direction so that the spray nozzle faces the root connection area on the other side of the blade length direction.

[0014] Furthermore, both the first and second mobile vehicles are equipped with a first driving component on their frames. The first driving component is connected to the spray pipe and is used to drive the spray pipe to move relative to each other in the same or opposite directions along the travel directions of the first and second mobile vehicles, and to fix the position of the spray pipe after adjustment.

[0015] Furthermore, the first driving component includes a rodless cylinder, and a fixed seat is rotatably mounted on the output seat of the rodless cylinder. The rotation axis of the fixed seat is perpendicular to the travel direction of the first moving vehicle and the second moving vehicle, and the spray pipe is mounted on the fixed seat.

[0016] Furthermore, a rotating motor is provided between the fixed base and the output seat of the rodless cylinder, and the rotation axis of the rotating motor constitutes the rotation axis of the fixed base, so as to drive the spray pipe to bend between the first moving vehicle and the second moving vehicle.

[0017] Furthermore, the spray pipe is slidably mounted on the fixed seat of the first mobile vehicle, the first switch includes a first shielding tube, the first shielding tube is sealed and sleeved on the spray pipe, the first shielding tube is fixedly mounted on the side of the fixed seat of the first mobile vehicle away from the second mobile vehicle, and the spray nozzle extends into the first shielding tube along the length direction of the spray pipe.

[0018] Furthermore, the second switch includes a second shielding tube and a second driving component. The second shielding tube is rotatably sleeved on the outer periphery of the spray pipe and is located at a fixed seat near the side of the first mobile vehicle. The second shielding tube has an elongated opening, which includes a first opening surface and a second opening surface.

[0019] The first opening extends along the axial direction of the spray pipe, and the second opening is arc-shaped, so that the elongated opening gradually expands from one side of the first moving vehicle to the side closer to the second moving vehicle.

[0020] The second driving component is connected to the second shielding pipe and is used to drive the second shielding pipe to rotate about the axial direction of the spray pipe.

[0021] Furthermore, the second driving component includes a first gear, a second gear, and a drive motor. The first gear is fixedly sleeved on the second shielding tube, the second gear meshes with the first gear, and the drive motor is mounted on the fixed seat of the first moving vehicle. The second gear is coaxially fixed on the rotating shaft of the drive motor.

[0022] Furthermore, the spray pipe is rotatably mounted on the fixed base of the second moving vehicle. An end gear is coaxially fixed to the end of the spray pipe. A bracket is provided at one end of the cylinder body of the rodless cylinder, and an external rack is provided on the bracket. When the rodless cylinder moves the spray pipe to a position close to the bracket, the end gear gradually meshes with the external rack, causing the spray pipe to rotate axially, thus placing the spray pipe in the second state. In this state:

[0023] The second shielding tube also has a connecting strip opening along its length. The connecting strip opening is offset from the long strip opening. When the connecting strip opening is directly opposite the spray nozzle, all the spray nozzles that are blocked by the second shielding tube can be opened at the same time.

[0024] Furthermore, both the first and second mobile vehicles are equipped with limit frames on their frames. A movable frame is slidably mounted on the limit frame, and a limit wheel is rotatably mounted on the movable frame. The limit wheel is used to roll and limit the position at the edge of the blade. The limit wheel and the spray nozzle of the spray pipe are staggered from each other along the movement path of the blade. A telescopic cylinder is provided on the limit frame, and the telescopic cylinder is used to drive the movable frame to move in a direction away from the edge of the blade.

[0025] And / or, a limiting ring is provided on the spray pipe, the limiting ring is located near the fixed seat of the first mobile vehicle and on the side away from the second mobile vehicle, and a return spring is provided between the limiting ring and the fixed seat of the first mobile vehicle, one end of the return spring is fixedly connected to the limiting ring, and the other end is fixedly connected to the first shielding pipe.

[0026] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0027] 1. The first and second moving vehicles respectively adsorb and move synchronously along the edge path of the turbine blade's length direction. The spray pipe is straddling between the two vehicles and located on the other side of the blade. It can automatically adjust its length during movement to ensure that the spray pipe always covers the corresponding width range of the blade. Thus, the continuous spraying operation of the entire blade can be completed in one movement along the blade's length direction, eliminating the need for repeated back-and-forth movements or segmented respraying. This not only improves spraying efficiency but also makes the spraying path more stable. The spray nozzle is always directly facing the blade surface, which is conducive to forming a smooth and continuous graphene ceramic coating, thereby effectively ensuring the overall spraying quality and coating consistency of the blade.

[0028] 2. During the spraying process at the connection area between the blade ends and the lower ring or upper crown, considering the special connection shape between the blade and the lower ring or upper crown, the first moving carriage stops while the second moving carriage continues to move along the long side path of the blade. The spray pipe swings around one side of the first moving carriage, achieving oscillating spraying of the connection area. This can fully cover areas with complex structures and limited space. Simultaneously, since the first and second moving carriages are attached to one side wall of the blade, and the spray pipe is located on the other side of the blade, the spraying operation is always carried out on the other side of the blade. This facilitates continuous and complete spraying of the other side surface of the blade, avoiding missed areas due to equipment obstruction or operational limitations.

[0029] By using the second switching device to gradually close the spray nozzles during the swinging process of the spray pipe, the spray nozzles on the side closest to the swing center are closed in sequence. This prevents the spray pipe from continuously spraying the same area during the swinging process, which would cause coating accumulation. This effectively prevents sagging and uneven thickness, thereby ensuring complete coverage of the connecting area while further improving the uniformity of the overall blade coating and the film quality. Attached Figure Description

[0030] Figure 1 A schematic diagram of the overall structure of a graphene ceramic coating spraying device for a water turbine provided by the present invention. Figure 1 ;

[0031] Figure 2 A schematic diagram of the overall structure of a graphene ceramic coating spraying device for a water turbine provided by the present invention. Figure 2 ;

[0032] Figure 3 This invention aims to illustrate the structural diagrams of the spray pipe, the first shielding pipe, and the second shielding pipe;

[0033] Figure 4 This is a schematic diagram illustrating the structure of the second driving component, the elongated opening, and the connecting strip opening of the present invention;

[0034] Figure 5 This is a schematic diagram illustrating the structure of the first switching element of the present invention;

[0035] Figure 6 This is a schematic diagram illustrating the relevant structures on the first driving component, as intended by the present invention.

[0036] Figure 7 This invention aims to illustrate the structural diagram of a water turbine impeller;

[0037] Figure 8 This invention aims to illustrate the movement states of the first moving vehicle and the second moving vehicle.

[0038] Figure 9 This invention aims to illustrate the structure of the spray pipe being driven to the top by a rodless cylinder;

[0039] Figure 10 This invention aims to illustrate the structural diagram of a spray pipe after it has been bent by a rotating motor;

[0040] Reference numerals: 100, First moving vehicle; 200, Second moving vehicle; 300, Spray pipe; 310, Spray nozzle; 320, End gear; 330, Limiting ring; 3301, Connecting block; 340, Return spring; 400, First switching element; 410, First shielding tube; 411, Limiting groove; 500, Second switching element; 510, Second shielding tube; 511, Long strip opening; 5111, First opening surface; 5112, Second opening surface; 512, Connecting strip opening; 520 521. Second drive component; 522. First gear; 523. Drive motor; 524. Protective cover; 600. First drive component; 610. Rodless cylinder; 611. Output seat; 620. Fixed seat; 630. Rotary motor; 640. Bracket; 650. External rack; 651. Hard rubber block; 700. Limiting frame; 710. Movable frame; 720. Limiting wheel; 730. Telescopic cylinder; 800. Lower ring; 810. Upper crown; 820. Blade. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

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

[0043] The following is for reference Figures 1-10 As shown in the illustration, and further explained with reference to specific embodiments, this embodiment provides a graphene ceramic coating spraying device for a water turbine, including a first moving vehicle 100 and a second moving vehicle 200. The first moving vehicle 100 and the second moving vehicle 200 can have the same vehicle body structure. To facilitate the differentiation of their respective movement states and functions, they are described separately as two moving vehicles in this embodiment. Both the first moving vehicle 100 and the second moving vehicle 200 can be configured as tracked vehicles 210. A negative pressure device, such as negative pressure holes or negative pressure cavities, can be provided on the track surface of the track 210. An external negative pressure source generates an adsorption force, enabling the first moving vehicle 100 and the second moving vehicle 200 to stably adhere to the surface of the blade 820 and move along the blade 820.

[0044] It should be understood that the arrangement of the first mobile vehicle 100 and the second mobile vehicle 200 is only for the purpose of illustrating the technical solution of this application, and their positional relationship is a relative description and does not constitute a limitation on the specific installation position or direction of movement. Without departing from the overall concept of the technical solution of this application, the first mobile vehicle 100 and the second mobile vehicle 200 can be interchanged in actual application, and their corresponding functions and roles can also be implemented by the other.

[0045] In different embodiments, sensors for sensing the edge position of the blade 820 can be installed on both the first moving vehicle 100 and the second moving vehicle 200. These sensors can be contact sensors, photoelectric sensors, laser rangefinders, or visual recognition sensors, etc., to acquire real-time information on the distance, attitude, or offset of the moving vehicle relative to the edge of the blade 820. Based on the signals fed back from the sensors, the control system can automatically adjust the traveling direction, speed, and adsorption position of the first moving vehicle 100 and the second moving vehicle 200, ensuring they stably adhere to the edge of the blade 820 and move continuously along the edge path. This avoids problems such as deviation and jamming caused by changes in the size of the blade 820, irregular edge curves, or installation errors, improving the reliability and adaptability of the entire spraying device's automatic movement along the edge of the blade 820.

[0046] In other embodiments, the track 210 can also be configured as a magnetic structure, for example, magnetic strips are pre-attached to the edge of the blade 820, and the track surface of the track 210 is attracted to the magnetic strips, thereby ensuring the stable movement of the first moving vehicle 100 and the second moving vehicle 200 on the blade 820. The above-mentioned adsorption methods can be selected or combined according to factors such as the material of the blade 820 and the construction environment. The first moving vehicle 100 and the second moving vehicle 200 are respectively adsorbed and set on one side wall of the same blade 820 of the turbine, and can move stably along the edge path of the blade 820 along its length.

[0047] The spray pipe 300 is positioned between the first moving vehicle 100 and the second moving vehicle 200, and is integrally arranged on the other side of the blade 820. This ensures that the spray pipe 300 is always located directly opposite the surface of the blade 820 to be sprayed during the spraying operation, thus avoiding obstruction from the main structures of the first and second moving vehicles 100 and 200. This also helps maintain a stable and uniform spraying distance between the spray nozzle 310 and the surface of the blade 820. Through this bridging arrangement, the spray pipe 300 can move synchronously with the two moving vehicles, forming a continuous and parallel spraying trajectory along the length of the blade 820, providing a structural basis for the continuous one-time spraying of the entire blade 820.

[0048] During the synchronous movement of the spray pipe 300 along the length direction of the blade 820 with the first moving vehicle 100 and the second moving vehicle 200, the spray pipe 300 can automatically adjust its own length according to the change in the relative distance between the two moving vehicles, thereby adapting to the width change or local contour change of the blade 820 along the length direction.

[0049] Specifically, when the width of the blade 820 increases, the spray pipe 300 extends accordingly to ensure that the spray nozzle 310 always covers the effective spraying area of ​​the blade 820; when the width of the blade 820 decreases, the spray pipe 300 shortens accordingly to prevent the spray nozzle 310 from exceeding the edge of the blade 820, thus avoiding paint waste or contamination. Through the adaptive adjustment of the length of the spray pipe 300, the spraying process has greater versatility and adaptability for turbine blades 820 of different specifications and sizes.

[0050] The spray pipe 300 is provided with multiple spray nozzles 310 along its length. The spray nozzles 310 can be long strip microporous structures extending along the length of the spray pipe 300, so that the coating forms a continuous and uniform spray band in the length direction; or, they can be composed of multiple independent spray holes spaced apart along the length of the spray pipe 300, and the surface of the blade 820 can be covered by spraying through the combination of multiple spray holes.

[0051] The different spray nozzle 310 forms mentioned above can be selected or replaced according to the characteristics of the coating material, the required coating thickness, and the surface morphology of the blade 820, so as to improve the coating uniformity and film quality. The spray pipe 300 is used to connect to the spray box, and the coating is drawn in by a negative pressure pump and sprayed out through the spray nozzle 310, thereby forming a stable coating. This feeding method can be achieved using existing mature technologies.

[0052] The first switch 400 is disposed on the spray pipe 300 and is used to control the spray nozzles 310 during the automatic length adjustment of the spray pipe 300. This ensures that only the spray nozzles 310 directly facing the surface of the blade 820 are open, while the spray nozzles 310 located outside the effective spraying range of the blade 820 are closed. In this way, the spray pipe 300 can maintain "on-demand spraying" during its extension and retraction, avoiding ineffective spraying in non-spraying areas due to changes in the length of the spray pipe 300.

[0053] In different embodiments, the first switch 400 can divide the spray nozzle 310 into multiple independent control areas along its length and perform segmented control through electromagnetic switches, pneumatic valves or mechanical linkage structures, so that the opening or closing of the spray nozzle 310 matches the length change process of the spray pipe 300, thereby further improving the accuracy of the spraying process and the utilization rate of the paint.

[0054] The second switch 500 is also mounted on the spray pipe 300, and is mainly used to control the spraying of the spray pipe 300 during the oscillating spraying process. After the first moving carriage 100 completes its movement along the short side path of the blade 820 and stops, the second moving carriage 200 continues to move along the long side path of the blade 820. At this time, the spray pipe 300 oscillates around the side closer to the first moving carriage 100. Through the action of the second switch 500, the spray nozzle 310 is gradually closed from the side closer to the first moving carriage 100 to the side closer to the second moving carriage 200, so that the spraying area of ​​the spray pipe 300 gradually moves away from the center of oscillation during the oscillation process.

[0055] The above control method effectively prevents the spray pipe 300 from continuously spraying the same area near the center of the swing during the swing process, thus preventing localized coating accumulation. In different embodiments, the second switch 500 can be implemented by using multiple spray nozzles 310 in conjunction with an electromagnetic switch to close them sequentially, or by using mechanical shielding structures such as rotating shielding components or sliding shielding components, thereby ensuring the stability of the spraying process and the uniformity of the coating thickness.

[0056] Optionally, in order to spray the root connection positions at both ends of the blade 820 and achieve complete spraying of the blade 820 in a single operation, the spray pipe 300 is configured to have a first state and a second state that can be switched between each other. Specifically, when the spray pipe 300 is in the first state, the spray pipe 300 is in the initial installation position, and the spray nozzle 310 is tilted towards the root connection area on one side of the blade 820's length direction, so that the spray direction can cover the connection transition area between the blade 820 and the upper crown 810 (e.g., ...). Figure 7 (As shown).

[0057] It is worth noting that the moving direction of the first moving vehicle 100 and the second moving vehicle 200 is generally from the connecting transition area between the blade 820 and the upper crown 810 to the connecting area between the blade 820 and the lower ring 800.

[0058] When the first moving vehicle 100 and the second moving vehicle 200 move to the other side along the length of the blade 820, the spray pipe 300 automatically switches to the second state and automatically rotates along its axial direction, so that the spray nozzle 310 faces the root connection area (the connection area between the blade 820 and the lower ring 800) on the other side of the length of the blade 820. In this way, the root connection areas at both ends of the blade 820 are sprayed sequentially without changing the spraying path, avoiding the need for additional independent spraying processes.

[0059] As an optional embodiment, a first driving member 600 is provided on the frame of both the first mobile vehicle 100 and the second mobile vehicle 200. The first driving member 600 is connected to the spray pipe 300 and is used to drive the spray pipe 300 to move relative to the first mobile vehicle 100 and the second mobile vehicle 200 in the same or opposite direction of travel when the first mobile vehicle 100 and the second mobile vehicle 200 move along the edge path of the blade 820 to both ends of the blade 820 in the length direction and the space occupied by the mobile vehicle body structure is limited. After the position adjustment is completed, the spray pipe 300 is limited and fixed.

[0060] With the above configuration, when the first moving vehicle 100 and the second moving vehicle 200 move to the space-constrained areas near the lower ring 800 or upper crown 810 at both ends of the blade 820's length direction, even if the moving vehicle body cannot continue to approach the root connection position of the blade 820, the first driving component 600 can drive the spray pipe 300 to compensate for the movement relative to the moving vehicle. This allows the spray nozzle 310 of the spray pipe 300 to further approach or align with the end of the blade 820 and its connection area, thereby avoiding problems such as insufficient positioning of the spray pipe 300, blind spots in spraying, or incomplete end coverage due to the space occupied by the moving vehicle. Thus, without changing the moving vehicle's travel path, effective spraying of the areas at both ends of the blade 820's length direction is achieved, ensuring the continuity and integrity of the spraying of the entire blade 820 and its root connection area.

[0061] Specifically, the first driving component 600 includes a rodless cylinder 610. A fixed seat 620 is rotatably mounted on the output seat 611 of the rodless cylinder 610. The rotation axis of the fixed seat 620 is perpendicular to the travel direction of the first moving vehicle 100 and the second moving vehicle 200. One end of the spray pipe 300 passes through and is rotatably connected to the fixed seat 620. The linear drive of the rodless cylinder 610 enables axial position adjustment of the spray pipe 300 between the first moving vehicle 100 and the second moving vehicle 200, while the rotatable connection of the fixed seat 620 provides the necessary rotational freedom for the spray pipe 300.

[0062] Furthermore, a rotary motor 630 is installed between the fixed base 620 and the output seat 611 of the rodless cylinder 610. The rotation axis of the rotary motor 630 coincides with the rotation axis of the fixed base 620. The rotary motor 630 is used to drive the fixed base 620 to rotate relative to the output seat 611 of the rodless cylinder 610, thereby causing the spray pipe 300 to rotate or bend between the first moving vehicle 100 and the second moving vehicle 200 in a controllable manner.

[0063] With the above settings, the spray pipe 300 can actively adjust its spraying posture and spatial orientation during the spraying process according to the curvature changes of the blade 820 along the length and width directions, as well as the local spatial structure characteristics of the area where the blade 820 connects with the lower ring 800 or the upper crown 810, rather than relying on the passive deformation of the spray pipe 300.

[0064] It should be noted that, to accommodate the aforementioned rotation and bending adjustment actions, the spray pipe 300 should be made of an elastic material that possesses a certain degree of flexibility and can recover its original shape after the external force is removed. Examples include metal pipes, corrugated pipes, or reinforced composite material pipes with elastic recovery capabilities. By combining the material's own elastic deformation capability with the active drive of the rotating motor 630, the spray pipe 300 can achieve multi-station, multi-post spraying while maintaining the stability of the spraying channel. This avoids changes in the channel cross-section or spraying instability due to excessive bending, and ensures the repeatability and consistency of the spraying posture in different spraying cycles.

[0065] Reference Figure 1 and Figure 2 As shown, the spray pipe 300 is slidably mounted on the fixed seat 620 of the first moving vehicle 100. The first switching component 400 includes a first blocking tube 410, which is sealed and sleeved on the spray pipe 300 and fixedly mounted on the side of the fixed seat 620 of the first moving vehicle 100 away from the second moving vehicle 200. The spray nozzle 310 extends along the length of the spray pipe 300 and extends into the interior of the first blocking tube 410. By moving the spray pipe 300 relative to the first blocking tube 410, the spray nozzle 310 can be gradually opened or closed. The structure is simple and reliable.

[0066] Reference Figure 3 and Figure 5 As shown, in the specific installation of the first shielding pipe 410, the first shielding pipe 410 is inserted through and rotatably connected to the fixed seat 620 of the first moving vehicle 100 to increase the connection stability of the first shielding pipe 410, ensure the continuity of blocking the spray nozzle 310, and enable the spray pipe 300 to rotate normally in the axial direction.

[0067] Reference Figure 3 and Figure 4As shown, the second switching component 500 includes a second blocking tube 510 and a second driving component 520. The second blocking tube 510 is made of a metal or non-metal material with a certain degree of flexibility to accommodate the deformation of the spray pipe 300 during bending, axial rotation, or oscillation, while ensuring that the blocking tube maintains a stable blocking effect after deformation. The second blocking tube 510 is rotatably sleeved on the outer periphery of the spray pipe 300 and is located at a fixed seat 620 near the first moving vehicle 100, so as to achieve synchronous adjustment of the blocking opening when the spray pipe 300 moves and bends along the length direction of the blade 820 with the moving vehicle.

[0068] The second shielding pipe 510 has an elongated opening 511, which includes a first opening surface 5111 and a second opening surface 5112. The first opening surface 5111 extends along the axial direction of the spray pipe 300, and the second opening surface 5112 is arc-shaped, so that the elongated opening 511 gradually expands from the side closer to the first moving vehicle 100 to the side closer to the second moving vehicle 200.

[0069] It should be noted that the curvature of the second opening surface 5112 can be designed according to the specific spatial shape of the connection area between the blade 820 and the lower ring 800 or the upper crown 810. For example, a gradient curve, a combination of linear and curve, or a segmented curve can be used to gradually close the spray nozzle 310 during the rotation of the second shielding tube 510, avoid excessive spraying on the side near the swing center, and ensure uniform coverage of the end area. The specific selection depends on the connection area between the blade 820 and the lower ring 800.

[0070] In such Figure 3 In the illustrated embodiment, the length of the second shielding tube 510 is less than the initial gap length of the spray pipe 300 between the first moving vehicle 100 and the second moving vehicle 200. However, in other embodiments, its length can be adjusted according to the specific requirements of the spraying range and the width of the blade 820 to meet the spraying requirements of blades 820 of different sizes. The second driving component 520 is connected to the second shielding tube 510 and is used to drive the second shielding tube 510 to rotate around the axial direction of the spray pipe 300, thereby achieving precise opening and closing of the elongated opening 511.

[0071] In a specific implementation, the second driving component 520 includes a first gear 521, a second gear 522, and a drive motor 523. The first gear 521 is fixedly sleeved on the second shielding tube 510, and the second gear 522 meshes with the first gear 521. The drive motor 523 is fixedly mounted outside the protective cover 524, and the second gear 522 is coaxially fixed on the shaft of the drive motor 523. To improve reliability and protection performance, the first gear 521 and the second gear 522 can be housed inside the protective cover 524 and can be made of wear-resistant materials to ensure that they can still smoothly drive the second shielding tube 510 to rotate during long-term use.

[0072] In addition, in optional embodiments, the second drive component 520 can also use a synchronous belt, sprocket or screw drive structure to replace the gear meshing method to achieve the same rotation control effect. At the same time, the transmission ratio and rotation angle can be adjusted according to the spraying accuracy requirements to achieve the flexibility of spraying the ends and connecting areas of different blades 820.

[0073] Reference Figure 2 As shown, to achieve automatic switching of the spray pipe 300 to the second state, the other end of the spray pipe 300 is rotatably mounted on the fixed seat 620 of the second moving vehicle 200, and an end gear 320 is coaxially fixedly mounted on the end of the spray pipe 300. A bracket 640 is provided at one end of the cylinder body of the rodless cylinder 610. The bracket 640 is L-shaped, and an external rack 650 is fixedly mounted on the bracket 640. When the rodless cylinder 610 drives the spray pipe 300 to move axially and approach one end of the bracket 640, the end gear 320 gradually meshes with the external rack 650, driving the spray pipe 300 to rotate axially, thereby achieving the switching of the spray pipe 300 from the first state to the second state. During this process, through the gradual meshing of the end gear 320 and the external rack 650, the rotation of the spray pipe 300 can achieve smooth and controllable angle adjustment, avoiding abrupt changes or uneven spraying of the spray nozzle 310 during the switching process.

[0074] Regarding the installation method of the external rack 650, since the fixed base 620 rotates under the action of the rotating motor 630 during operation, the external rack 650 is fixedly installed on the bracket 640 by a hard rubber block 651. The hard rubber block 651 has a certain elastic deformation capability. When the fixed base 620 rotates and drives the end gear 320 to move to a position close to the external rack 650, the external rack 650 can be adaptively deflected under the elastic action of the hard rubber block 651 after being abutted by the fixed base 620, thereby realizing the smooth meshing between the external rack 650 and the end gear 320, and further driving the spray pipe 300 to rotate along its axial direction.

[0075] In other alternative embodiments, the spray pipe 300 can also be rotated by directly driving a motor. However, compared to the above-mentioned method of achieving rotation through adaptive meshing of gears and racks, this method usually requires additional control units or sensors to achieve synchronous control, which can easily increase system cost and structural complexity.

[0076] Furthermore, the second shielding tube 510 is also provided with a connecting strip opening along its length, which is staggered from the long strip opening 511. When the connecting strip opening is directly opposite the spray nozzle 310, multiple spray nozzles 310 blocked by the second shielding tube 510 can be opened simultaneously, thereby expanding the spray coverage area. The connecting strip opening is designed so that after the spray pipe 300 moves to the root area of ​​the blade 820, by continuing to drive the second shielding tube 510 to rotate, the spray pipe 300 can simultaneously open multiple spray nozzles 310 at its end during rotation, achieving comprehensive spraying of the root and connecting area of ​​the blade 820.

[0077] It should be noted that this design is mainly aimed at, for example Figure 7 The turbine impeller blade 820 shown is particularly suitable for the curved area where the root of the blade 820 connects to the lower ring 800 or the upper crown 810. Of course, it is also suitable for other relatively straight and structurally regular blades 820. By setting the second shielding pipe 510 and its rotation control structure, the spray pipe 300 can fully cover the root area of ​​the blade 820, achieving uniform spraying and avoiding local accumulation or sagging of the coating, thereby ensuring the consistency of the coating thickness and the overall film quality.

[0078] Meanwhile, this design allows for adjustments to the length, position, and opening angle of the connecting strip based on variations in blade 820 width, spatial constraints at the connection point between the root and the lower ring 800 or upper crown 810, and installation errors of the blade 820. This adapts to the needs of different blade 820 specifications and spraying conditions, improving the applicability and flexibility of the device.

[0079] Reference Figure 1 and Figure 6 As shown, in order to ensure the stable movement of the first moving vehicle 100 and the second moving vehicle 200 along the edge path of the blade 820, a limit frame 700 is provided on the frame of both the first moving vehicle 100 and the second moving vehicle 200. Multiple movable frames 710 are slidably arranged on the limit frame 700, and limit wheels 720 are rotatably arranged on the movable frames 710. The limit wheels 720 are used to roll and guide the movement along the edge of the blade 820, thereby constraining the offset of the first moving vehicle 100 and the second moving vehicle 200 along the predetermined path.

[0080] The limiting wheel 720 and the spray nozzle 310 of the spray pipe 300 are staggered along the moving path of the blade 820 to ensure that the limiting structure does not interfere with the spraying operation. The limiting frame 700 is equipped with a telescopic cylinder 730, which is used to drive the movable frame 710 to move away from the edge of the blade 820. This allows the limiting wheel 720 to automatically retract when spraying to the edge or end of the blade 820, avoiding obstruction or dead corners in the spraying of the entire surface of the blade 820, and ensuring the continuity and integrity of the spraying.

[0081] In different embodiments, the limiting frame 700 can be designed as a telescopic frame structure or equipped with a multi-stage adjustment mechanism to adapt to changes in the thickness, curvature, or end shape of the blades 820, ensuring that the limiting wheel 720 can stably adhere to the edge of the blades 820 throughout the entire spraying process. Simultaneously, the limiting wheel 720 can use replaceable wheel surface materials, such as rubber or high-friction plastic, to enhance gripping force with the edge of the blades 820 and reduce surface damage to the blades 820. The limiting frame 700 and the movable frame 710 can also be made of lightweight aluminum alloy or high-strength composite materials to reduce the overall weight of the device and improve the mobility and response speed of the mobile vehicle.

[0082] As an optional embodiment, a limiting ring 330 is provided on the spray pipe 300. The limiting ring 330 is located near the fixed seat 620 of the first moving vehicle 100 and on the side away from the second moving vehicle 200. A return spring 340 is provided between the limiting ring 330 and the fixed seat 620 of the first moving vehicle 100. One end of the return spring 340 is fixedly connected to the limiting ring 330, and the other end is fixed to the first blocking pipe 410. This provides a mutual pulling force between the first moving vehicle 100 and the second moving vehicle 200, so that they can fit more closely against the edge of the blade 820 during movement, thereby ensuring the stability of the relative positional relationship between the spray pipe 300 and the blade 820.

[0083] The first shielding tube 410 has a limiting groove 411 along its length. A limiting block is fixedly installed on the limiting ring 330. The limiting block is fixedly connected to the spray pipe 300 and is slidably connected within the limiting groove 411 to achieve precise guidance of the spray pipe 300. In addition, the return spring 340 can automatically reset the spray pipe 300 to the first state, i.e., the initial state, under its own torque. This ensures that the spray pipe 300 always maintains a reasonable position and spraying angle during continuous spraying and state switching, improving spray uniformity and process reliability.

[0084] Optionally, to further improve adaptability and accuracy, a fine-tuning mechanism or buffer device can be added to the return spring 340 and the limiting ring 330 structure to accommodate minor offsets or vibrations at the blade edge 820, ensuring that the spray pipe 300 remains stable during high-speed movement or complex curved surface spraying, and preventing spraying deviations, uneven spray layer thickness, or localized missed spraying. Through the above combination of multiple structures and designs, this embodiment can balance blade edge guidance, spraying accuracy, and device stability, achieving high-quality, continuous, and uniform turbine blade 820 spraying operations.

[0085] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A graphene ceramic coating spraying device for a water turbine, characterized in that, include: The first mobile vehicle (100) and the second mobile vehicle (200) are respectively attached to one side wall of the same blade (820) of the water turbine and can move along the edge path of the blade (820) in the length direction. A spray pipe (300) is installed between the first moving vehicle (100) and the second moving vehicle (200) and is located on the other side of the blade (820). The spray pipe (300) can automatically adjust its length as it moves along the length direction of the blade (820) with the first moving vehicle (100) and the second moving vehicle (200). The spray pipe (300) is provided with a plurality of spray nozzles (310) along its length direction. The first switch (400) is disposed on the spray pipe (300) and is used to gradually open or close the spray nozzle (310) during the automatic length adjustment process of the spray pipe (300), so that only the spray nozzle (310) facing the blade (820) on the spray pipe (300) is in the open state. The second switch (500) is disposed on the spray pipe (300) and is used to gradually close the spray nozzle (310) from the side closer to the first mobile vehicle (100) to the side closer to the second mobile vehicle (200) during the process of the second mobile vehicle (200) continuing to move along the long side path of the blade (820) after the first mobile vehicle (100) has completed its movement along the short side path of the blade (820) and stopped.

2. The water turbine graphene ceramic coating spraying device according to claim 1, characterized in that, The spray pipe (300) has a first state and a second state that can be switched between each other, wherein: When the spray pipe (300) is in the first state, the spray pipe (300) is in the initial position, and the spray nozzle (310) is inclined and faces the root connection area on one side of the blade (820) in the length direction. When the spray pipe (300) is in the second state, the first moving vehicle (100) and the second moving vehicle (200) move to the other side of the blade (820) in the length direction, and the spray pipe (300) automatically rotates in its axial direction so that the spray nozzle (310) faces the root connection area on the other side of the blade (820) in the length direction.

3. The water turbine graphene ceramic coating spraying device according to claim 2, characterized in that, Both the first mobile vehicle (100) and the second mobile vehicle (200) are equipped with a first driving component (600). The first driving component (600) is connected to the spray pipe (300) and is used to drive the spray pipe (300) to move relative to each other in the same or opposite directions along the travel direction of the first mobile vehicle (100) and the second mobile vehicle (200), and to fix the position of the spray pipe (300) after adjustment.

4. The water turbine graphene ceramic coating spraying device according to claim 3, characterized in that, The first driving component (600) includes a rodless cylinder (610), and a fixed seat (620) is rotatably disposed on the output seat (611) of the rodless cylinder (610). The rotation axis of the fixed seat (620) is perpendicular to the travel direction of the first moving vehicle (100) and the second moving vehicle (200). The spray pipe (300) is disposed on the fixed seat (620).

5. The water turbine graphene ceramic coating spraying device according to claim 4, characterized in that, A rotating motor (630) is provided between the fixed base (620) and the output seat (611) of the rodless cylinder (610). The rotation axis of the rotating motor (630) forms the rotation axis of the fixed base (620) to drive the spray pipe (300) to bend between the first moving vehicle (100) and the second moving vehicle (200).

6. The water turbine graphene ceramic coating spraying device according to claim 4 or 5, characterized in that, The spray pipe (300) is slidably mounted on the fixed seat (620) of the first mobile vehicle (100). The first switch (400) includes a first shielding tube (410), which is sealed on the spray pipe (300). The first shielding tube (410) is fixedly mounted on the side of the fixed seat (620) of the first mobile vehicle (100) away from the second mobile vehicle (200). The spray nozzle (310) extends into the first shielding tube (410) along the length of the spray pipe (300).

7. The water turbine graphene ceramic coating spraying device according to claim 6, characterized in that, The second switch (500) includes a second shielding tube (510) and a second drive component (520). The second shielding tube (510) is rotatably sleeved on the outer periphery of the spray pipe (300) and is located at a fixed seat (620) near the side of the first mobile vehicle (100). The second shielding tube (510) has an elongated opening (511) which includes a first opening surface (5111) and a second opening surface (5112). The first opening surface (5111) extends along the axial direction of the spray pipe (300), and the second opening surface (5112) is arc-shaped, so that the elongated opening (511) gradually expands from one side of the first moving vehicle (100) toward the side closer to the second moving vehicle (200). The second driving component (520) is connected to the second shielding pipe (510) and is used to drive the second shielding pipe (510) to rotate about the axial direction of the spray pipe (300).

8. The water turbine graphene ceramic coating spraying device according to claim 7, characterized in that, The second driving component (520) includes a first gear (521), a second gear (522), and a drive motor (523). The first gear (521) is fixedly sleeved on the second shielding tube (510), and the second gear (522) meshes with the first gear (521). The drive motor (523) is mounted on the fixed seat (620) of the first moving vehicle (100), and the second gear (522) is coaxially fixed on the rotating shaft of the drive motor (523).

9. The water turbine graphene ceramic coating spraying device according to claim 7, characterized in that, The spray pipe (300) is rotatably mounted on the fixed base (620) of the second moving vehicle (200). An end gear (320) is coaxially fixed to the end of the spray pipe (300). A bracket (640) is provided at one end of the cylinder body of the rodless cylinder (610). An external rack (650) is provided on the bracket (640). When the rodless cylinder (610) moves the spray pipe (300) to a position close to the bracket (640), the end gear (320) gradually meshes with the external rack (650), causing the spray pipe (300) to rotate axially, thus placing the spray pipe (300) in the second state, wherein: The second shielding tube (510) is also provided with a connecting strip opening (512) along its length. The connecting strip opening (512) is offset from the long strip opening (511). When the connecting strip opening (512) is facing the spray nozzle (310), all the spray nozzles (310) that are blocked by the second shielding tube (510) can be opened at the same time.

10. The water turbine graphene ceramic coating spraying device according to claim 6, characterized in that, Both the first mobile vehicle (100) and the second mobile vehicle (200) are equipped with a limiting frame (700). A movable frame (710) is slidably mounted on the limiting frame (700). A limiting wheel (720) is rotatably mounted on the movable frame (710). The limiting wheel (720) is used to roll and limit the position at the edge of the blade (820). The limiting wheel (720) and the spray nozzle (310) of the spray pipe (300) are staggered from each other along the moving path of the blade (820). A telescopic cylinder (730) is provided on the limiting frame (700). The telescopic cylinder (730) is used to drive the movable frame (710) to move in a direction away from the edge of the blade (820). And / or, a limiting ring (330) is provided on the spray pipe (300), the limiting ring (330) is located near the fixed seat (620) of the first mobile vehicle (100) and on the side away from the second mobile vehicle (200), and a return spring (340) is provided between the limiting ring (330) and the fixed seat (620) of the first mobile vehicle (100), one end of the return spring (340) is fixedly connected to the limiting ring (330), and the other end is fixedly connected to the first shielding pipe (410).

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