A precision atomizing spray processing device for water turbine components

Abstract

This invention relates to the field of surface treatment technology for turbine components, specifically to a precision atomization spraying device for coatings on turbine components. The device includes a support frame, an internal positioning and rotating structure, and a fixed bracket threaded onto the surface of the positioning and rotating structure. An spraying structure is located inside the fixed bracket, and a tailrace pipe is positioned at the top of the support frame. The spraying structure includes an outer tube and an inner tube, both extending forward to the front of the fixed bracket. A gas flow channel is formed between the outer and inner tubes, and the interior of the inner tube serves as a coating flow channel. This invention provides a precision atomization spraying device for coatings on turbine components, which, through the coordinated design of the positioning and rotating structure and the spraying structure, achieves an integrated spraying system of dynamic positioning, airflow vibration atomization, and adaptive spray width adjustment.

Description

Technical Field

[0001] This invention relates to the field of surface treatment technology for water turbine components, specifically to a precision atomization spraying device for coatings on water turbine components. Background Technology

[0002] As is well known, a water turbine is a power machine that converts the energy of water flow into rotational mechanical energy. It belongs to the category of turbine machinery in fluid machinery. Since water turbines use fluid as energy for transmission, it is necessary to spray a corresponding corrosion-resistant coating on the surface of the water turbine in order to make the water turbine have a better service life.

[0003] As the core equipment for converting water flow energy into mechanical energy, the components of a water turbine (such as the tailrace pipe) are constantly exposed to high-speed water flow, silt erosion, and cavitation, resulting in significant surface corrosion and wear. Currently, coating spraying is an important means to improve the corrosion and wear resistance of water turbine components, but existing technologies have the following obvious drawbacks in practical applications:

[0004] Existing spraying devices mostly use traditional pressure atomization or pneumatic atomization methods, which are difficult to adapt to the complex shapes of turbine components, such as the large-diameter inner wall of the tailrace pipe. When spraying on the inner wall of the tailrace pipe, the distance between the nozzle and the wall surface is difficult to keep constant, and the mixing state of the airflow and the coating is unstable, resulting in uneven distribution of droplet size. This can easily cause local areas to experience dripping or missed spraying.

[0005] In addition, during traditional spraying, paint droplets are prone to rebound and splashing under the action of high-speed airflow, especially when spraying vertical curved surfaces. Unattached paint not only wastes materials but also generates harmful waste gas and waste liquid, causing pollution to the working environment. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a precision atomization spraying device for coatings used in water turbine components. It features an integrated spraying system that combines dynamic positioning, airflow vibration atomization, and adaptive spray width adjustment through the coordinated design of a positioning rotation structure and a spraying structure.

[0008] (II) Technical Solution

[0009] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a coating precision atomization spraying processing device for water turbine components, comprising a support frame, wherein a positioning and rotating structure is provided inside the support frame, and a fixed bracket is threaded onto the surface of the positioning and rotating structure, wherein a spraying structure is provided inside the fixed bracket, and a tailwater pipe is provided at the top of the support frame.

[0010] The spraying structure includes an outer tube and an inner tube. The front sides of both the outer and inner tubes extend to the front side of the fixed bracket, forming a gas flow channel between them. The interior of the inner tube is a paint flow channel. A collar is provided on the rear side of the surface of the outer tube, and an electric cylinder is provided at the top inside the collar. A limit frame is bolted to the left side of the electric cylinder, and an atomizing spraying mechanism is slidably arranged inside the limit frame. An elastic adjusting rod is slidably arranged on the front side of the limit frame, and the left side of the elastic adjusting rod slides in contact with the inner wall of the tailwater pipe. The elastic adjusting rod is bolted to the atomizing spraying mechanism.

[0011] By adopting the above technical solution, and by setting up a spray structure, the gas and paint can be synchronously transported through the gas channel formed between the outer and inner pipes and the paint channel inside the inner pipe. By setting up an electric cylinder, the distance between the atomizing spray mechanism and the inner wall of the tailwater pipe can be adjusted over a wide range. The elastic adjustment rod can adapt to the curvature changes of the inner wall of the tailwater pipe, enabling the atomizing spray mechanism to adapt to the curvature changes of the inner wall of the tailwater pipe, so that the atomizing spray mechanism can maintain a constant distance with the inner wall of the tailwater pipe, thereby improving the spray quality.

[0012] The present invention is further configured such that: the atomizing spraying mechanism includes a spraying block; a paint channel is provided on the right side of the spraying block, and a paint spray pipe is provided on the left side of the spraying block; the paint spray pipe is connected to the paint channel; a gas guide seat is connected to the left side of the spraying block, and the gas guide seat is located on the surface of the paint spray pipe; a blocking component is bolted to the left side of the spraying block, and the blocking component is located on the surface of the gas guide seat; a spray width adjustment component is bolted to the left side of the gas guide seat, and the spray width adjustment component works in conjunction with the blocking component; a vibrating atomizing component is provided in the middle of the spraying block, and the vibrating atomizing component is connected to both the paint channel and the paint spray pipe; gas channels are provided at the top and bottom of the spraying block, and the edge of the vibrating atomizing component is located inside the gas channel; the gas channel is connected to both the gas guide seat and the blocking component.

[0013] Using the above technical solution, by setting up an atomizing spray mechanism, the paint flows into the paint channel through the inner pipe and enters the vibrating atomizing component through the paint spray nozzle. Meanwhile, the airflow enters the gas channel through the gas flow path between the outer and inner pipes. When the airflow comes into contact with the vibrating atomizing component, it excites the component to vibrate at high frequency, improving the uniformity of the droplet size and thus enhancing the spray quality. When part of the airflow flows into the gas guide seat, it mixes the atomized paint with the airflow, forming a stable spray flow after passing through the blocking component and the spray width adjustment component, which is then sprayed onto the inner wall of the tailpipe, reducing the risk of sagging. During this process, the spray width adjustment component can adjust the spray range according to the diameter of the conical tailpipe, ensuring... While improving spray quality, it also enhances spray efficiency. During the spray width adjustment process, the blocking range of the blocking component is simultaneously adjusted, allowing the blocking component to adapt to the spray range and improve flexibility. During spraying, the blocking component can guide part of the airflow to the left end of the spray block and form an annular air curtain, which can prevent paint droplets from rebounding and splashing under the action of high-speed airflow. Furthermore, due to the narrow space channel inside the blocking component, the increased airflow velocity when the airflow passes through this area increases the friction between the air inside the channel and the channel wall, resulting in an increase in the temperature of the exhaust air. Therefore, it can achieve the effect of preliminary curing of the sprayed paint and drying of unsprayed areas, which can further optimize the spraying effect.

[0014] The present invention is further configured such that: a telescopic air pipe and a telescopic liquid pipe are respectively connected to the rear side of the spray block; the left side of the telescopic air pipe and the telescopic liquid pipe are respectively connected to a gas channel and a paint channel; and the telescopic air pipe and the telescopic liquid pipe are respectively connected to an outer pipe and an inner pipe.

[0015] By adopting the above technical solution, the telescopic air pipe and telescopic liquid pipe can extend and retract as the spray block moves, maintaining a continuous supply of gas and coating. When the spray structure moves along the inner wall of the tailwater pipe, the elastic deformation of the hose adapts to the positional change, avoiding pipe pulling and damage.

[0016] The present invention is further configured such that: the vibrating atomizing component includes a vibrating diaphragm, the vibrating diaphragm is disposed in the middle of the inside of the spray block, and the edge of the vibrating diaphragm is located in the gas channel; a fixing plate is bolted to the inside of the vibrating diaphragm; a conical partition is bolted to the rear side of the fixing plate, and a spiral guide groove is formed on the surface of the conical partition; a partition is annularly bolted to the surface of the fixing plate, and the fixing plate is bolted to the vibrating diaphragm through the partition; flow holes are formed at the top and bottom of the inside of the vibrating diaphragm, and a support is bolted to the inside of the flow holes; elastic sheets are annularly arranged on both sides of the surface of the support.

[0017] By adopting the above technical solution and setting up a vibrating atomizing component, when the airflow passes through the flow hole, the flow area of ​​the flow hole is changed by the elastic sheet. Therefore, the airflow is constrained by the narrow space when it passes through the hole. It forms a high-speed jet due to the constraint of the wall surface. The turbulent pulsation inside the airflow and the friction with the wall surface will cause periodic fluctuations, which will generate vibration and make the elastic sheet vibrate accordingly. The vibration is then transmitted to the vibrating diaphragm, the fixing plate and the conical partition, cutting the coating into fine droplets. This improves the uniformity of the coating droplet size and reduces the risk of dripping.

[0018] The present invention is further configured such that: the side of the elastic sheet near the support column is a fixed end, the other end is a suspended end, several elastic sheets on the same side are arranged as a group, and the two groups of elastic sheets are staggered.

[0019] By adopting the above technical solution, the vibration frequency can be maintained stably by absorbing the airflow impact through the elastic deformation of the fixed end and the suspended end of the elastic sheet.

[0020] The present invention is further configured such that: the blocking component includes two coaxially arranged flow guide rings, the flow guide rings are located on the surface of the gas flow guide seat, a first flexible connecting part is provided on the left side of the flow guide rings, an adjusting ring is provided on the left side of the first flexible connecting part, a plurality of support blocks are bolted between the opposite sides of the two adjusting rings, a flow guide channel is formed between the opposite sides of the two flow guide rings and the adjusting ring, and the flow guide channel is connected to the gas channel.

[0021] By adopting the above technical solution, the airflow enters the guide channel through the gas channel by setting the barrier component. Through the cooperation of the first flexible connecting part and the adjusting ring, an annular air curtain is formed to wrap the droplets. The annular air curtain can block the droplet splashing, improve the coating adhesion rate, and reduce material waste. Furthermore, due to the narrow space of the channel inside the barrier component, the air velocity increases when the airflow passes through this point, which increases the friction between the air inside the channel and the channel wall, resulting in an increase in the temperature of the exhaust air. Therefore, it can achieve the effect of preliminary curing of the sprayed coating and drying of the unsprayed areas, which can further optimize the spraying effect. The support block supports the adjusting ring to keep it stable and prevent the air curtain from becoming disordered.

[0022] The present invention is further configured such that: the spray width adjustment assembly includes two second flexible connecting parts, the second flexible connecting parts are disposed on the left side of the gas guide seat and are coaxially arranged with the gas guide seat, an elastic adjustment piece is disposed on the left side of the second flexible connecting parts, electromagnets are bolted to the top and bottom of the gas guide seat, magnetic elements are disposed on the opposite sides of the two electromagnets, the electromagnets and magnetic elements are magnetically engaged, and the side of the magnetic element near the elastic adjustment piece is bolted to it, a flexible rod is bolted to the left side of the magnetic element, and the other side of the flexible rod is connected to the inner wall of the inner adjustment ring.

[0023] By adopting the above technical solution and setting up a spray pattern adjustment component, the distance between the two elastic adjustment plates is the largest when the diameter of the spray cone tailpipe is small. At this time, the spray channel area is large, and the spray flow is sprayed onto the inner wall surface in a more concentrated manner. When the spray diameter is large, the magnetic field generated by energizing the electromagnet can attract the magnetic plate to move towards the electromagnet and drive the two elastic adjustment plates to stretch. This causes the two elastic adjustment plates to deform inward at the second flexible connection position, which reduces the spray channel. This allows the spray flow to be sprayed onto the inner wall surface in a fan shape when passing through this area. Thus, the spray range of the spray flow can be adjusted according to the diameter of the cone tailpipe, which can improve the spray efficiency while ensuring the spray quality.

[0024] The present invention is further configured such that: a support plate is bolted to the rear side of the fixed bracket, a connecting ring is provided on the rear side of the support plate, and both the connecting ring and the support plate are sleeved on the surface of the outer tube; a damping rod is rotatably connected to the inside of the connecting ring in a ring shape, and the damping rod is rotatably connected to the side of the support plate near the support plate.

[0025] By adopting the above technical solution and setting up damping rods distributed in a ring shape, the angular deviation of the outer tube due to gravity can be avoided, ensuring that the nozzle is always perpendicular to the wall surface and improving the spraying accuracy.

[0026] The present invention is further configured such that: the positioning rotation structure includes a mounting bracket, a reduction motor is bolted to the top of the mounting bracket, and a drive shaft is bolted to the output end of the reduction motor; a fixed frame is bolted to the front side of the drive shaft; a longitudinal reciprocating screw is rotatably connected inside the fixed frame; a connecting block is threaded onto the surface of the longitudinal reciprocating screw, and a pressing block is bolted to the other end of the connecting block; the pressing block is in close contact with the tailpipe on its side; a transverse reciprocating screw is rotatably connected inside the support frame; the rear side of the transverse reciprocating screw extends to the rear side of the support frame and is bolted to a connecting shaft; and the fixed bracket is threaded onto the surface of the transverse reciprocating screw.

[0027] By adopting the above technical solution, a positioning and rotating structure is set up. The longitudinal reciprocating screw is driven to rotate by an external drive device, which allows the two connecting blocks to move relative to each other along the longitudinal reciprocating screw. This allows the pressing block to tightly abut against the surface of the tailwater pipe, achieving a positioning effect. The fixed frame is driven to rotate by a geared motor through a drive shaft, which allows the tailwater pipe to rotate synchronously. Therefore, it can be used in conjunction with the spraying structure to uniformly spray the inner wall of the tailwater pipe, improving the uniformity of the coating on the inner wall of the tailwater pipe. During the rotation of the drive shaft, the connecting shaft and the transverse reciprocating screw will rotate synchronously, which can cause the fixed bracket to move synchronously with the displacement of the spraying structure. This ensures that the rotation of the tailwater pipe and the displacement of the spraying structure are synchronized, improving the consistency of construction and avoiding situations such as missed spraying or uneven spraying.

[0028] The invention is further configured such that: both the connecting shaft and the drive shaft are fitted with transmission wheels, and a belt is wound between the interiors of the two transmission wheels; the front side of the bottom of the tailpipe is in rotatable contact with a positioning frame, and the bottom of the positioning frame is bolted to the support frame.

[0029] By adopting the above technical solution, the synchronous rotation of the drive shaft and the connecting shaft can be achieved by setting the transmission wheel and belt, and the positioning frame can support the front end of the tailpipe, making it rotate stably.

[0030] (III) Beneficial Effects

[0031] Compared with the prior art, the present invention provides a precision atomization spraying device for coatings on turbine components, which has the following advantages:

[0032] This precision atomization spraying device for water turbine components utilizes a positioning and rotating structure. Through the linkage of longitudinal and transverse reciprocating screws, it achieves real-time pressure on the inner wall of the tailrace pipe, simultaneously driving the tailrace pipe to rotate around the spraying structure. This allows for uniform spraying of the tailrace pipe's inner wall, improving the uniformity of the coating. Furthermore, the flexible adjustment rod and electric cylinder within the spraying structure maintain a constant distance between the atomization spraying mechanism and the tailrace pipe's inner wall, ensuring spray quality. The device also utilizes airflow to excite high-frequency vibration of the atomization component, combined with dual-fluid atomization of the gas and coating channels, enhancing droplet uniformity and preventing sagging and missed spraying. During spraying, the blocking component dynamically adjusts the blocking range according to the surface curvature, following the spray width adjustment component. Airflow from the blocking component forms an air curtain, preventing coating droplets from rebounding and splashing under high-speed airflow, further optimizing coating uniformity. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 This is a schematic diagram showing the connection between the positioning rotation structure and the spraying structure in this invention;

[0035] Figure 3 This is a schematic diagram of the spraying structure in this invention;

[0036] Figure 4 This is a schematic diagram of the atomizing spray mechanism in this invention;

[0037] Figure 5 This is a schematic diagram of the structure of the vibration atomization component in this invention;

[0038] Figure 6 This is a schematic diagram showing the connection between the barrier component and the injection adjustment mechanism in this invention;

[0039] Figure 7 This is a schematic diagram showing the connection between the fixed bracket and the spraying structure in this invention.

[0040] Figure 8 This is a schematic diagram showing the connection between the tailwater pipe and the positioning and rotating structure in this invention.

[0041] In the diagram: 1. Support frame; 2. Positioning and rotating structure; 21. Mounting bracket; 22. Drive shaft; 23. Fixed frame; 24. Longitudinal reciprocating screw; 25. Connecting block; 26. Pressing block; 27. Transverse reciprocating screw; 28. Connecting shaft; 3. Fixed bracket; 4. Spraying structure; 41. Outer tube; 42. Inner tube; 43. Collar; 44. Electric cylinder; 45. Limiting frame; 46. Atomizing spraying mechanism; 461. Spraying block; 462. Paint spray pipe; 463. Gas guide seat; 464. Barrier component; 464a. Guide ring; 464b. First flexible connection part; 464c. Adjusting ring; 464d. Support block; 464e. 465. Flow guide channel; 465a. Spray width adjustment assembly; 465b. Second flexible connection part; 465c. Elastic adjustment plate; 465c. Electromagnet; 465d. Magnetic component; 465e. Flexible rod; 466. Vibration atomization assembly; 466a. Vibration diaphragm; 466b. Fixing plate; 466c. Conical partition; 466d. Spiral guide groove; 466e. Partition; 466f. Flow hole; 466g. Support column; 466h. Elastic plate; 47. Elastic adjustment rod; 5. Tailwater pipe; 6. Telescopic air pipe; 7. Telescopic liquid pipe; 8. Support plate; 9. Connecting ring; 10. Damping rod; 11. Transmission wheel; 12. Belt; 13. Positioning frame. Detailed Implementation

[0042] 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.

[0043] Example 1

[0044] Please see Figure 1-7 A precision atomization spraying device for coatings on water turbine components includes a support frame 1, a positioning and rotating structure 2 is provided inside the support frame 1, and a fixed bracket 3 is threaded onto the surface of the positioning and rotating structure 2. A spraying structure 4 is provided inside the fixed bracket 3, and a tailwater pipe 5 is provided on the top of the support frame 1.

[0045] The spray structure 4 includes an outer pipe 41 and an inner pipe 42. The front sides of both the outer pipe 41 and the inner pipe 42 extend to the front side of the fixed bracket 3, forming a gas flow channel between them. The interior of the inner pipe 42 is a paint flow channel. A collar 43 is provided on the rear side of the surface of the outer pipe 41, and an electric cylinder 44 is provided at the top inside the collar 43. A limit frame 45 is bolted to the left side of the electric cylinder 44, and an atomizing spray mechanism 46 is slidably arranged inside the limit frame 45. An elastic adjusting rod 47 is slidably arranged on the front side of the limit frame 45, and the left side of the elastic adjusting rod 47 slides in contact with the inner wall of the tailwater pipe 5. The atomizing spray mechanism 46 is bolted on. By setting the spray structure 4, the gas and paint can be synchronously transported through the gas channel formed between the outer pipe 41 and the inner pipe 42 and the paint channel in the inner pipe 42. The distance between the atomizing spray mechanism 46 and the inner wall of the tailwater pipe 5 can be adjusted over a wide range by setting the electric cylinder 44. The elastic adjustment rod 47 can adapt to the curvature of the inner wall of the tailwater pipe 5, so that the atomizing spray mechanism 46 can adapt to the curvature of the inner wall of the tailwater pipe 5 and maintain a constant distance between the atomizing spray mechanism 46 and the inner wall of the tailwater pipe 5, thereby improving the spray quality.

[0046] The atomizing spraying mechanism 46 includes a spraying block 461. A paint channel is provided on the right side of the spraying block 461, and a paint spray pipe 462 is provided on the left side of the spraying block 461, communicating with the paint channel. A gas guide seat 463 is connected to the left side of the spraying block 461, and the gas guide seat 463 is located on the surface of the paint spray pipe 462. A blocking component 464 is bolted to the left side of the spraying block 461, and the blocking component 464 is located on the surface of the gas guide seat 463. A spray width adjustment component 465 is bolted to the left side of the gas guide seat 463. The spray width adjustment component 465 works in conjunction with the blocking component 464. The spraying block 461 contains... A vibration atomizing component 466 is provided in the middle of the spray block 461, and the vibration atomizing component 466 is connected to the paint channel and the paint spray pipe 462. Gas channels are provided at the top and bottom of the spray block 461. The edge of the vibration atomizing component 466 is located inside the gas channel. The gas channel is connected to the gas guide seat 463 and the blocking component 464. By setting the atomizing spray mechanism 46, the paint flows into the paint channel through the inner pipe 42 and enters the vibration atomizing component 466 through the paint spray pipe 462. The airflow enters the gas channel through the gas flow channel of the outer pipe 41 and the inner pipe 42. When the airflow comes into contact with the vibration atomizing component 466, the airflow is used to stimulate the vibration atomizing component. The high-frequency vibration of component 466 improves the uniformity of droplet size when the paint passes through the vibrating atomization component 466, thereby improving the spraying quality. When part of the airflow flows into the gas guide seat 463, it mixes the atomized paint with the airflow, forming a stable spray flow after passing through the blocking component 464 and the spray width adjustment component 465, and then sprays it onto the inner wall of the tailpipe 5, reducing the risk of sagging. During this process, the spray width adjustment component 465 can adjust the spray range of the spray flow according to the diameter of the conical tailpipe 5, ensuring spraying quality while improving spraying efficiency. The adjustment process of the spray width adjustment component 465 also simultaneously adjusts the blocking component 464. The blocking range allows the blocking component 464 to adapt to the spraying range, improving flexibility. During spraying, the blocking component 464 can guide part of the airflow to the left end of the spray block 461 and form an annular air curtain, which can prevent paint droplets from rebounding and splashing under the action of high-speed airflow. Furthermore, due to the narrow space channel inside the blocking component 464, the increased airflow velocity when the airflow passes through this area increases the friction between the air inside the channel and the channel wall, resulting in an increase in the temperature of the exhaust air. Therefore, it can achieve the effect of preliminary curing of the sprayed paint and drying of unsprayed areas, which can further optimize the spraying effect.

[0047] The rear side of the spray block 461 is connected to a telescopic air pipe 6 and a telescopic liquid pipe 7. The left side of the telescopic air pipe 6 and the telescopic liquid pipe 7 are connected to the gas channel and the paint channel, respectively. The telescopic air pipe 6 and the telescopic liquid pipe 7 are connected to the outer pipe 41 and the inner pipe 42, respectively. Through the setting of the telescopic air pipe 6 and the telescopic liquid pipe 7, they can extend and retract as the spray block 461 moves, so as to maintain the continuous supply of gas and paint. When the spray structure 4 moves along the inner wall of the tailwater pipe 5, the elastic deformation of the hose adapts to the position change, so as to avoid the pipeline being pulled and broken.

[0048] The vibration atomizing component 466 includes a vibration diaphragm 466a, which is disposed in the center of the injection block 461, with its edge located within the gas channel. A fixing plate 466b is bolted to the inside of the vibration diaphragm 466a, and a conical partition 466c is bolted to the rear side of the fixing plate 466b. A spiral guide groove 466d is formed on the surface of the conical partition 466c. A partition 466e is annularly bolted to the surface of the fixing plate 466b, and the fixing plate 466b is bolted to the vibration diaphragm 466a via the partition 466e. Flow holes 466f are formed at the top and bottom of the inside of the vibration diaphragm 466a, and a support column 466g is bolted to the inside of the flow holes 466f. Both sides of the support column 466g are provided with elastic sheets 466h in a ring shape. By setting the vibration atomizing component 466, when the airflow passes through the flow hole 466f, the elastic sheet 466h changes the flow area of ​​the flow hole 466f. Therefore, the airflow is constrained by the narrow space when passing through this point. It forms a high-speed jet due to the constraint of the wall surface. The turbulent pulsation inside the airflow and the friction with the wall surface will cause periodic fluctuations, which will generate vibration and make the elastic sheet 466h vibrate along with it. The vibration is then transmitted to the vibrating diaphragm 466a, the fixing plate 466b and the conical partition 466e, which cuts the paint into fine droplets, thereby improving the uniformity of the paint droplet size and reducing the risk of dripping.

[0049] Among them, the side of the elastic sheet 466h closest to the support column 466g is the fixed end, and the other end is the suspended end. Several elastic sheets 466h on the same side are set as a group, and the two groups of elastic sheets 466h are staggered. By setting the elastic deformation of the fixed end and the suspended end of the elastic sheet 466h to absorb the airflow impact, the vibration frequency can be kept stable.

[0050] The blocking component 464 includes two coaxially arranged guide rings 464a, which are located on the surface of the gas guide seat 463. A first flexible connecting portion 464b is located on the left side of the guide rings 464a, and an adjusting ring 464c is located on the left side of the first flexible connecting portion 464b. Several support blocks 464d are bolted between the opposite sides of the two adjusting rings 464c. A guide channel 464e is formed between the opposite sides of the two guide rings 464a and the adjusting rings 464c, and the guide channel 464e communicates with the gas channel. By setting the blocking component 464, the airflow enters the guide channel 464e through the gas channel, and then... The flexible connecting part 464b and the adjusting ring 464c cooperate to form an annular air curtain that envelops the droplets. The annular air curtain can block droplet splashing, improve the coating adhesion rate, and reduce material waste. Furthermore, due to the narrow space channel inside the blocking component 464, the increased air velocity when the airflow passes through this area increases the friction between the air inside the channel and the channel wall, resulting in an increase in the temperature of the exhaust air. Therefore, it can achieve the effect of preliminary curing of the sprayed coating and drying of the unsprayed areas, which can further optimize the spraying effect. Meanwhile, the support block 464d supports the adjusting ring 464c to keep it stable and prevent the air curtain from becoming disordered.

[0051] The spray pattern adjustment assembly 465 includes two second flexible connecting parts 465a. The second flexible connecting parts 465a are located on the left side of the gas guide seat 463 and are coaxially arranged with the gas guide seat 463. An elastic adjusting piece 465b is located on the left side of the second flexible connecting part 465a. Electromagnets 465c are bolted to both the top and bottom of the gas guide seat 463. Magnetic elements 465d are located on opposite sides of the two electromagnets 465c. The electromagnets 465c and magnetic elements 465d are magnetically engaged, and the side of the magnetic element 465d closest to the elastic adjusting piece 465b is bolted to it. A flexible rod 465e is bolted to the left side of the magnetic element 465d, and the other side of the flexible rod 465e is connected to the inner adjusting ring 464c. The wall connection utilizes a spray pattern adjustment assembly. When the diameter of the spray cone tailpipe 5 is small, the distance between the two elastic adjustment plates 465b is at its maximum. At this time, the spray channel area is large, and the spray flow is concentrated on the inner wall surface. When the spray diameter is large, the electromagnet 465c generates an attractive magnetic field, which attracts the magnetic plates to move towards the electromagnet 465c and stretches the two elastic adjustment plates 465b. This causes the two elastic adjustment plates 465b to deform inward at the second flexible connection part 465a, reducing the spray channel. This allows the spray flow to fan out onto the inner wall surface when passing through this area. Thus, the spray range can be adjusted according to the diameter of the cone tailpipe 5, ensuring spray quality while improving spray efficiency.

[0052] The fixed bracket 3 is bolted to the rear side of the support plate 8, and the support plate 8 is provided with a connecting ring 9 on the rear side. Both the connecting ring 9 and the support plate 8 are sleeved on the surface of the outer tube 41. The connecting ring 9 is rotatably connected to the damping rod 10 in a ring shape inside, and the damping rod 10 is rotatably connected to the side of the support plate 8. By setting the damping rod 10 in a ring shape, the angle deviation of the outer tube 41 due to gravity can be avoided, ensuring that the nozzle is always perpendicular to the wall surface and improving the spraying accuracy.

[0053] The working principle of this embodiment is as follows: Paint flows into the paint channel of the atomizing spray mechanism 46 through the inner pipe 42 and the telescopic liquid pipe 7. Gas flows into the gas channel through the gas flow channel between the outer pipe 41 and the inner pipe 42 and the telescopic air pipe 6. The electric cylinder 44 adjusts the position of the telescopic adjustment limit frame 45, causing the atomizing spray mechanism 46 to move closer to or further away from the inner wall of the tailwater pipe 5, achieving a wide range of distance adjustments. The elastic adjustment rod 47 slides with the undulations of the inner wall surface, pushing the atomizing spray mechanism 46 to adapt to the surface changes and maintain a constant distance from the wall. When the airflow passes through the flow hole 466f, the elastic plate 466h changes the flow area of ​​the flow hole 466f, therefore... When the airflow passes through this area, it is constrained by the narrow space, forming a high-speed jet due to the wall constraint. The turbulent pulsations inside the airflow and the friction with the wall cause periodic fluctuations, resulting in vibration. This vibration causes the elastic sheet 466h to vibrate as well, which is then transmitted to the vibrating diaphragm 466a, the fixed plate 466b, and the conical partition 466e, cutting the paint into fine droplets. This improves the uniformity of the paint droplet size. The atomized droplets enter the paint nozzle 462, and the gas guide seat 463 guides part of the airflow to the paint nozzle 462 to mix with the droplets. After passing through the channel in the spray width adjustment component 465 to form a stable spray flow, it is then sprayed out. On the inner wall of the tailpipe 5; during the spraying process, part of the airflow enters the guide channel 464e through the gas channel, and through the cooperation of the first flexible connection part 464b and the adjusting ring 464c, an annular air curtain is formed to wrap the droplets. The annular air curtain can block the droplet splashing, improve the coating adhesion rate, and reduce material waste. Furthermore, due to the narrow space of the channel inside the blocking component 464, the airflow velocity increases when the airflow passes through this area, which increases the friction between the air inside the channel and the channel wall, resulting in an increase in the temperature of the exhaust air. Therefore, the sprayed coating can be initially cured and the unsprayed areas can be dried. When the diameter of the tailpipe 5 is small, the distance between the two elastic adjustment plates 465b is the largest. At this time, the area of ​​the spray channel is large, and the spray flow is sprayed onto the inner wall surface in a more concentrated manner. When the spray diameter is large, the magnetic field generated by energizing the electromagnet 465c can attract the magnetic plate to move towards the electromagnet 465c, and drive the two elastic adjustment plates 465b to stretch. This causes the two elastic adjustment plates 465b to deform inward at the position of the second flexible connection 465a, which can reduce the spray channel. This allows the spray flow to be sprayed onto the inner wall surface in a fan shape when passing through this area. Thus, the spray range of the spray flow can be adjusted according to the diameter of the conical tailpipe 5.

[0054] Example 2

[0055] refer to Figure 8A precision atomization spraying device for coatings on turbine components further includes a positioning and rotating structure 2. The positioning and rotating structure 2 includes a mounting bracket 21. A reduction motor is bolted to the top of the mounting bracket 21, and a drive shaft 22 is bolted to the output end of the reduction motor. A fixed frame 23 is bolted to the front side of the drive shaft 22. A longitudinal reciprocating screw 24 is rotatably connected inside the fixed frame 23. A connecting block 25 is threaded onto the surface of the longitudinal reciprocating screw 24, and a pressing block 26 is bolted to the other end of the connecting block 25. The pressing block 26 is in close contact with the side of the tailrace pipe 5. A transverse reciprocating screw 27 is rotatably connected inside the support frame 1. The rear side of the transverse reciprocating screw 27 extends to the rear side of the support frame 1 and is bolted to a connecting shaft 28. A fixed bracket 3 is threaded onto the surface of the transverse reciprocating screw 27. The positioning and rotating structure 2 is driven by an external drive device to rotate the longitudinal reciprocating screw 24, which allows the two connecting blocks 25 to move relative to each other along the longitudinal reciprocating screw 24. This allows the pressing block 26 to tightly abut against the surface of the tailwater pipe 5, achieving a positioning effect. The fixed frame 23 is driven to rotate by the geared motor through the drive shaft 22, which allows the tailwater pipe 5 to rotate synchronously. Therefore, it can work with the spraying structure 4 to uniformly spray the inner wall of the tailwater pipe 5, improving the uniformity of the coating on the inner wall of the tailwater pipe 5. During the rotation of the drive shaft 22, the connecting shaft 28 and the transverse reciprocating screw 27 will rotate synchronously, which allows the fixed bracket 3 to synchronously drive the spraying structure 4 to move. This ensures that the rotation of the tailwater pipe 5 and the displacement of the spraying structure 4 are synchronized, improving the consistency of construction and avoiding missed spraying and uneven spraying.

[0056] The connecting shaft 28 and the drive shaft 22 are both fitted with transmission wheels 11, and a belt 12 is wound between the two transmission wheels 11. The front side of the bottom of the tailwater pipe 5 is in rotatable contact with a positioning frame 13, and the bottom of the positioning frame 13 is bolted to the support frame 1. By setting the transmission wheels 11 and the belt 12, the drive shaft 22 and the connecting shaft 28 can be rotated synchronously. The positioning frame 13 can support the front end of the tailwater pipe 5 and make it rotate stably.

[0057] The working principle of this embodiment is as follows: After the front end of the tailwater pipe 5 is placed on the positioning frame 13, the longitudinal reciprocating screw 24 is rotated by the external drive device, which allows the two connecting blocks 25 to move relative to each other along the longitudinal reciprocating screw 24, so that the pressing block 26 can tightly abut against the surface of the tailwater pipe 5 to position the tailwater pipe 5. The fixed frame 23 is driven to rotate by the reduction motor through the drive shaft 22, so that the tailwater pipe 5 can rotate synchronously. Therefore, it can work with the spray structure 4 to uniformly spray the inner wall of the tailwater pipe 5, improving the uniformity of the coating on the inner wall of the tailwater pipe 5. During the rotation of the drive shaft 22, the transmission wheel 11 and the belt 12 will be rotated synchronously. The transmission connection of the transmission wheel 11 and the belt 12 causes the connecting shaft 28 and the transverse reciprocating screw 27 to rotate, which allows the fixed bracket 3 to synchronously drive the displacement of the spray structure 4. This ensures that the rotation of the tailwater pipe 5 and the displacement of the spray structure 4 are synchronized, improving the consistency of construction.

[0058] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. Those skilled in the art can make modifications to this embodiment without contributing any inventive step after reading this specification. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precision atomization spraying device for coatings on turbine components, comprising a support frame (1), characterized in that: The support frame (1) is provided with a positioning and rotating structure (2) inside, and a fixed bracket (3) is threaded onto the surface of the positioning and rotating structure (2). The fixed bracket (3) is provided with a spray structure (4) inside, and a tailwater pipe (5) is provided on the top of the support frame (1). The spray structure (4) includes an outer tube (41) and an inner tube (42). The front sides of the outer tube (41) and the inner tube (42) extend to the front side of the fixed bracket (3). A gas flow channel is formed between the outer tube (41) and the inner tube (42). The interior of the inner tube (42) is a paint flow channel. A collar (43) is provided on the rear side of the surface of the outer tube (41). An electric cylinder (44) is provided at the top inside the collar (43). A limit frame (45) is bolted to the left side of the electric cylinder (44). An atomizing spray mechanism (46) is slidably provided inside the limit frame (45). An elastic adjusting rod (47) is slidably provided on the front side of the limit frame (45). The left side of the elastic adjusting rod (47) is in sliding contact with the inner wall of the tailwater pipe (5). The elastic adjusting rod (47) is bolted to the atomizing spray mechanism (46). The atomizing spraying mechanism (46) includes a spray block (461). A paint channel is provided on the right side of the spray block (461), and a paint spray pipe (462) is provided on the left side of the spray block (461). The paint spray pipe (462) communicates with the paint channel. A gas guide seat (463) is connected to the left side of the spray block (461), and the gas guide seat (463) is located on the surface of the paint spray pipe (462). A blocking component (464) is bolted to the left side of the spray block (461), and the blocking component (464) is located on the surface of the gas guide seat (463). A spray width adjustment component (465) is bolted to the left side of the body guide seat (463). The spray width adjustment component (465) is used in conjunction with the blocking component (464). A vibration atomizing component (466) is provided in the middle of the spray block (461). The vibration atomizing component (466) is connected to the paint channel and the paint spray pipe (462) respectively. Gas channels are provided at the top and bottom of the spray block (461). The edge of the vibration atomizing component (466) is inside the gas channel. The gas channel is connected to the gas guide seat (463) and the blocking component (464) respectively. The vibrating atomizing component (466) includes a vibrating diaphragm (466a), which is disposed in the middle of the spray block (461), with the edge of the vibrating diaphragm (466a) located within the gas channel. A fixing plate (466b) is bolted to the inside of the vibrating diaphragm (466a), and a conical partition (466c) is bolted to the rear side of the fixing plate (466b). A spiral guide groove (466c) is formed on the surface of the conical partition (466c). 6d), the surface of the fixing plate (466b) is annularly bolted with a partition plate (466e), and the fixing plate (466b) is bolted to the vibrating diaphragm (466a) through the partition plate (466e). The vibrating diaphragm (466a) has flow holes (466f) at the top and bottom, and a support column (466g) is bolted inside the flow hole (466f). The two sides of the support column (466g) are annularly arranged with elastic sheets (466h). The spray pattern adjustment assembly (465) includes two second flexible connecting parts (465a). The second flexible connecting parts (465a) are located on the left side of the gas guide seat (463) and are coaxially arranged with the gas guide seat (463). An elastic adjustment piece (465b) is provided on the left side of the second flexible connecting part (465a). Electromagnets (465c) are bolted to the top and bottom of the gas guide seat (463). Magnetic elements (465d) are provided on opposite sides of the two electromagnets (465c). The electromagnets (465c) and magnetic elements (465d) are magnetically engaged. The side of the magnetic element (465d) close to the elastic adjustment piece (465b) is bolted to it. A flexible rod (465e) is bolted to the left side of the magnetic element (465d), and the other side of the flexible rod (465e) is connected to the inner wall of the inner adjustment ring (464c).

2. The precision atomization spraying device for coatings on turbine components according to claim 1, characterized in that: The rear side of the spray block (461) is connected to a telescopic air pipe (6) and a telescopic liquid pipe (7). The left side of the telescopic air pipe (6) and the telescopic liquid pipe (7) are connected to the gas channel and the paint channel, respectively. The telescopic air pipe (6) and the telescopic liquid pipe (7) are connected to the outer pipe (41) and the inner pipe (42), respectively.

3. The precision atomization spraying device for coatings on turbine components according to claim 1, characterized in that: The elastic sheet (466h) has a fixed end on the side closest to the support column (466g) and a suspended end on the other side. Several elastic sheets (466h) on the same side are set as a group, and the two groups of elastic sheets (466h) are staggered.

4. The precision atomization spraying device for coatings on turbine components according to claim 1, characterized in that: The barrier component (464) includes two coaxially arranged flow guide rings (464a), which are located on the surface of the gas flow guide seat (463). A first flexible connecting part (464b) is provided on the left side of the flow guide ring (464a), and an adjusting ring (464c) is provided on the left side of the first flexible connecting part (464b). A plurality of support blocks (464d) are bolted between the opposite sides of the two adjusting rings (464c). A flow guide channel (464e) is formed between the opposite sides of the two flow guide rings (464a) and the adjusting ring (464c), and the flow guide channel (464e) is connected to the gas channel.

5. The precision atomization spraying device for coatings on turbine components according to claim 1, characterized in that: The fixed bracket (3) is bolted to the rear side of a support plate (8). A connecting ring (9) is provided on the rear side of the support plate (8). Both the connecting ring (9) and the support plate (8) are sleeved on the surface of the outer tube (41). The inside of the connecting ring (9) is rotatably connected to a damping rod (10), and the damping rod (10) is rotatably connected to the side of the support plate (8) near it.

6. The precision atomization spraying device for coatings on turbine components according to claim 1, characterized in that: The positioning and rotating structure (2) includes a mounting bracket (21), a geared motor is bolted to the top of the mounting bracket (21), and a drive shaft (22) is bolted to the output end of the geared motor. A fixed frame (23) is bolted to the front side of the drive shaft (22). A longitudinal reciprocating screw (24) is rotatably connected inside the fixed frame (23). A connecting block (25) is threaded onto the surface of the longitudinal reciprocating screw (24), and a pressing block (26) is bolted to the other end of the connecting block (25). The pressing block (26) is in close contact with the tailwater pipe (5) on the side close to it. A transverse reciprocating screw (27) is rotatably connected inside the support frame (1). The rear side of the transverse reciprocating screw (27) extends to the rear side of the support frame (1) and is bolted to a connecting shaft (28). The fixed bracket (3) is threaded onto the surface of the transverse reciprocating screw (27).

7. The precision atomization spraying device for coatings on turbine components according to claim 6, characterized in that: The surfaces of the connecting shaft (28) and the drive shaft (22) are fitted with transmission wheels (11), and a belt (12) is wound between the interiors of the two transmission wheels (11). The front side of the bottom of the tailwater pipe (5) is in rotatable contact with a positioning frame (13), and the bottom of the positioning frame (13) is bolted to the support frame (1).

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