Tool and method for spraying annular flame tube with complex structure
By designing a complex structure annular flame tube spraying tooling and combining the use of a long-pole spray gun and a conventional spray gun, the problem of poor enamel spraying on the inner surface of the annular flame tube was solved, achieving 100% coverage and efficient spraying effects.
Patent Information
- Application Number
- CN202510930133.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-07
- Publication Date
- 2025-10-10
AI Technical Summary
The existing technology cannot provide effective and reliable tooling, resulting in poor high-temperature enamel spraying effect on the inner surface of the annular flame tube, which may lead to rework and affect the use requirements.
A complex-structure annular flame tube spraying tooling was designed, including a flame tube tooling, a long-pole spray gun and a conventional spray gun. Through the tilting and free-rotating tooling design, combined with the combined use of the long-pole spray gun and the conventional spray gun, 100% coverage of the inner surface of the flame tube was ensured.
The enamel layer on the inner surface of the flame tube has a 100% coverage rate, which improves the spraying effect and reliability, reduces the number of repairs, and meets the use requirements of aircraft engines.
Smart Images
Figure CN120755008A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of coating key parts of aircraft engines, and particularly relates to a tool and method for spraying an annular flame tube with a complex structure. Background Art
[0002] Currently, the annular flame tube, a critical component of aircraft engines, is typically designed to be coated with a layer of high-temperature resistant enamel on its inner surface to prevent high-temperature oxidation and extend its service life. The annular flame tube is welded together from over 100 parts, all of which are thin-walled sheet metal with wavy, discontinuous surfaces. Numerous weld rings, numerous vent holes, and unevenly sized grooves are present on the surface. Furthermore, the annular flame tube's inner surface structure is extremely complex, making the enamel coating process extremely challenging. Conventional high-temperature enamel spraying tooling and process methods are difficult to guarantee a consistent coating of the inner surface. In actual operation, the inner surface of the annular flame tube often suffers from enamel peeling or enamel loss, leading to the need for repairs. Since each repair requires sintering at 1200°C, which affects the material properties of the annular flame tube, the typical limit for high-temperature enamel coating is three times. Therefore, quality issues such as enamel coating on the flame tube have become a bottleneck in engine component manufacturing. In summary, currently in the spraying of annular flame tubes, it is impossible to provide effective and reliable tooling for the annular flame tubes, which affects the spraying effect of high-temperature enamel on the inner surface of the annular flame tubes and may cause the annular flame tubes to fail to meet the use requirements. Summary of the Invention
[0003] The present invention provides a tool and method for spraying an annular flame tube with a complex structure, aiming to solve the problem that in the current spraying of annular flame tubes, it is impossible to provide effective and reliable tooling for the annular flame tube, which affects the effect of spraying high-temperature enamel on the inner surface of the annular flame tube and may cause the annular flame tube to fail to meet the use requirements.
[0004] In order to achieve the above object, the present invention adopts the following technical solutions: The present invention provides a tool for spraying a complex-structured annular flame tube, comprising a flame tube tool, a long-pole spray gun, and a conventional spray gun; wherein: The flame tube tooling includes a base unit, a support is provided on the base unit, the support has a mounting panel, and the mounting panel is provided with a flame tube positioning assembly along the thickness direction thereof, and the flame tube positioning assembly can cooperate with the support to install the flame tube to be installed; The flame tube positioning assembly includes a positioning ring, which is mounted on the mounting panel along its axial direction. A rotating shaft is provided through the support and the positioning ring, and is coaxially connected to the positioning ring. One end of the rotating shaft is provided with a free-rotating assembly, and the other end is connected to a fixed assembly. In the installed state, the fixed assembly can fix the flame tube to be installed, and the free-rotating assembly can drive the rotating shaft to rotate, thereby driving the flame tube to be installed to rotate. The rotating shaft can make the flame tube to be installed be tilted at a preset angle to the horizontal plane, and keep the flame tube to be installed in a free rotating state, so that the long-pole spray gun and the conventional spray gun can spray the flame tube to be installed at different angles.
[0005] In some embodiments, the fixing assembly includes a pressure cover, which is installed on an end of the positioning ring away from the mounting panel through multiple pillars. In the installed state, the flame tube to be installed is located between the pressure cover and the positioning ring and fixed to the rotating shaft.
[0006] Furthermore, the gland, the support, the positioning ring and the mounting panel are connected in a detachable manner.
[0007] In some embodiments, the free-rotating assembly is located at an end of the mounting panel away from the positioning ring, and the free-rotating assembly includes a bearing connected to the rotating shaft, a first bushing sleeved on the rotating shaft, a washer, and a second bushing.
[0008] In some embodiments, the rotating shaft is detachably mounted on the free-rotating assembly.
[0009] In some embodiments, the positioning ring is provided with a connection structure adapted to the shape of the flame tube to be installed.
[0010] In some embodiments, the base unit includes a base and a plurality of casters disposed on a bottom of the base.
[0011] Furthermore, the support includes an inclined support surface connected to the mounting panel, and the inclined support surface is connected to the support through a bottom plate.
[0012] The present invention also provides a method for spraying an annular flame tube with a complex structure. The method is based on the above-mentioned tooling for spraying an annular flame tube with a complex structure, and the method comprises the following steps: S1. Clamp the flame tube to be installed on the tooling for spraying the complex structure annular flame tube to form the tooling for spraying, so that the flame tube to be installed is tilted at a preset angle to the horizontal plane, so that the flame tube to be installed is in a state where it can rotate freely; S2. Move the tooling to be sprayed to a preset spraying position, load the prepared high-temperature enamel into a long-pole spray gun and a conventional spray gun, preset the ambient temperature and humidity, and spray the flame tube to be installed in the tooling to be sprayed using the long-pole spray gun and the conventional spray gun; S3. After the spraying of the flame tube to be installed is completed, the flame tube to be installed is taken out by disassembling the tooling to be sprayed, and the spraying operation of the flame tube to be installed is completed.
[0013] Furthermore, in S2, the preset ambient temperature and humidity parameters are as follows: The ambient temperature is controlled at 15℃~30℃, and the ambient humidity is controlled at 35%~60%.
[0014] Compared with the prior art, the tooling and method for spraying a complex-structured annular flame tube of the present invention have the following beneficial effects: The present invention provides a fixture for spraying an annular flame tube with a complex structure. By rationally designing a clamping fixture for the process of spraying high-temperature enamel on an annular flame tube with a complex structure, the fixture is suitable for high-temperature enamel coating on the inner surface of an annular flame tube with a complex structure, so as to meet the requirements of the process of spraying high-temperature enamel on an annular flame tube with a complex structure of an aircraft engine. The present invention enables the flame tube to be placed at a certain angle to the horizontal plane, which makes it more convenient to spray high-temperature enamel on the inner surface of the flame tube. The flame tube can rotate freely on the fixture and is used to cooperate with a long-pole spray gun and a conventional spray gun and spraying method to complete the enamel spraying on the inner surface of the flame tube, ensuring 100% coverage of the enamel layer on the inner surface of the flame tube. The spraying fixture can be moved and rotated at any time, making it more convenient for workers to operate. The present invention uses a combination of a conventional spray gun and a long-pole spray gun. The long-pole spray gun has a small amount of paint output, but can extend into small gaps for precise spraying. It is used for spraying grooves, holes, corners and other special parts of the flame tube. The conventional spray gun has a large amount of paint output, but cannot spray accurately, and it is difficult to spray special parts of grooves. It can be used to spray large flat parts on the inner surface of the flame tube. By combining the conventional spray gun and the long-pole spray gun, the spraying of all parts of the inner surface of the flame tube, such as grooves, holes, corners, large surfaces, etc., can be completed, ensuring 100% coverage of the enamel layer on the inner surface of the flame tube.
[0015] On the other hand, the present invention provides a method for spraying a complex-structure annular flame tube. For spraying a complex structure on the inner surface of the flame tube, the method sprays the grooves and corners of the inner surface of the large end from the bell mouth of the small end of the flame tube, sprays the grooves and corners of the inner surface of the small end from the opening of the large end, and then sprays the left and right large surfaces of the inner surface of the flame tube at different angles. The method can complete the spraying of the inner surface of the flame tube in conjunction with a spraying rotary tooling and a spraying combination fixture, thereby improving the effect and reliability of the spraying of the inner surface of the flame tube and having better practicality. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings in the specification are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.
[0017] Figure 1 This is a schematic structural diagram of a tooling for spraying a complex-structured annular flame tube according to the present invention; Figure 2 This is a structural schematic diagram of a bottom plate in a tooling for spraying a complex structure annular flame tube according to the present invention.
[0018] Among them, 1. base, 2. support, 3. positioning ring, 4. rotating shaft, 5. first bushing, 6. washer, 7. second bushing, 8. first nut, 9. pressure cover, 10. pillar, 11. bottom plate, 12. caster, 13. first screw, 14. second nut, 15. second screw, 16. bearing, 17. third screw, 18. flame tube. DETAILED DESCRIPTION
[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.
[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0022] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0023] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.
[0025] like Figure 1 and Figure 2 As shown, the present invention provides a tool for spraying a complex annular flame tube, including a flame tube tool, a long-pole spray gun, and a conventional spray gun; wherein: The flame tube tooling includes a base unit, on which a support 2 is provided. The support 2 has a mounting panel. The mounting panel is provided with a flame tube positioning assembly along its thickness direction. The flame tube positioning assembly can cooperate with the support 2 to install the flame tube to be installed. The flame tube positioning assembly includes a positioning ring 3, which is mounted on the mounting panel along its axial direction. A rotating shaft 4 is provided through the support 2 and the positioning ring 3 and is coaxially connected to the positioning ring 3. One end of the rotating shaft 4 is provided with a free-rotating assembly, and the other end is connected to a fixed assembly. In the installed state, the fixed assembly can fix the flame tube to be installed, and the free-rotating assembly can drive the rotating shaft 4 to rotate, thereby driving the flame tube to be installed to rotate. The rotating shaft 4 can make the flame tube to be installed be inclined at a preset angle to the horizontal plane, and keep the flame tube to be installed in a free rotation state, so that the long-pole spray gun and the conventional spray gun can spray the flame tube to be installed at different angles.
[0026] The tooling for spraying an annular flame tube with a complex structure of the present invention integrates three parts: a flame tube tooling, a long-pole spray gun, and a conventional spray gun to form a complete spraying tool. The flame tube tooling includes a base unit, a support 2, and a flame tube positioning assembly; a rotating shaft 4 passes through the support 2 and the positioning ring 3, and the flame tube is rotated by a free-rotating assembly; the flame tube is tilted and suspended in the air at a preset inclination angle to maintain a free-rotating state; the long-pole spray gun cooperates with a conventional spray gun to cover the complex inner surface for spraying. By adopting the tooling of this aspect, the dead corners of the complex structure of the flame tube can be sprayed. Through the design of the tooling with tilt and free rotation, the hidden areas such as grooves and welds on the inner wall of the flame tube can be exposed to the coverage range of the spray gun to improve the coverage rate of the spraying; the long-pole spray gun accurately sprays grooves, holes, etc., and the conventional spray gun efficiently covers large surfaces, complementing the shortcomings to form a complete spraying; the preset inclination angle can adapt to flame tubes of different sizes such as the 24 trumpet-shaped structures at the small end, thereby improving the applicability of the tooling of the present invention.
[0027] In some working conditions, in the tooling for spraying the complex structure annular flame tube of the present invention, the pressure cover 9 is installed on the upper end of the positioning ring 3 through the support 10, and forms a clamping structure with the positioning ring 3 to fix the flame tube. The pressure cover 9, the support 10, the positioning ring 3 and the support 2 are detachably connected. Specifically, one end of the support 10 and the pressure cover 9 are installed through the second nut, and the other end of the support 10 is installed through the third screw 17 and the positioning ring 3 and the mounting panel of the support 2. The pressure cover 9 of the present invention adopts a detachable design, which can simplify the flame tube clamping process, form a clamping structure to prevent the flame tube 18 from shaking during rotary spraying, and ensure the spraying accuracy of the flame tube 18.
[0028] Furthermore, in the tooling for spraying a complex-structure annular flame tube of the present invention, the free-rotation assembly includes a bearing 16, a first bushing 5, a washer 6, and a second bushing 7, which together support the rotation of the rotating shaft 4. The rotating shaft 4 is detachably connected to the free-rotation assembly. Specifically, the rotating shaft 4 is locked and connected to the free-rotation assembly via a first nut 8. The combination of the bearing 16, the first bushing 5, the washer 6, and the second bushing 7 of the present invention can reduce the resistance of the rotating shaft 4 and achieve manual free rotation of the flame tube; the detachable structure facilitates the replacement of wear parts such as the first bushing 5 and the second bushing 7. The washer 6 can extend the service life of the first bushing 5 and the second bushing 7.
[0029] In the tooling for spraying a complex-structure annular flame tube of the present invention, the positioning ring 3 is provided with a connection structure that matches the shape of the flame tube bell mouth, ensuring that the axis of the flame tube coincides with the rotating shaft 4 after installation, thereby avoiding rotational eccentricity; the matching structure improves the stability of the flame tube installation.
[0030] In addition, in the tooling for complex structure annular flame tube spraying of the present invention, the base unit includes a base 1 and casters 12 to support the movement of the tooling. The inclined support surface is an optional method. Of course, different tooling processing methods can be selected according to the actual working conditions to achieve different angles of inclination. The bottom plate 11 is connected to the base 1; the casters 12 are used to realize the rapid movement of the tooling from the assembly area to the spray booth; the inclined support surface ensures The angle is fixed to avoid angle deviation during spraying.
[0031] The present invention also provides a method for spraying an annular flame tube with a complex structure, which is based on the tooling for spraying an annular flame tube with a complex structure of the present invention and comprises the following steps: S1. Clamp the flame tube to be installed on the tooling for spraying the complex structure annular flame tube to form the tooling for spraying, so that the flame tube to be installed is tilted at a preset angle to the horizontal plane, so that the flame tube to be installed is in a state where it can rotate freely; S2. Move the tooling to be sprayed to a preset spraying position, load the prepared high-temperature enamel into a long-pole spray gun and a conventional spray gun, preset the ambient temperature and humidity, and spray the flame tube to be installed in the tooling to be sprayed using the long-pole spray gun and the conventional spray gun; S3. After the spraying of the flame tube to be installed is completed, the flame tube to be installed is taken out by disassembling the tooling to be sprayed, and the spraying operation of the flame tube to be installed is completed.
[0032] In some embodiments, the present invention controls the ambient temperature to 15-30°C and the humidity to 35-60%. By employing the fixture of the present invention, the entire process of clamping, moving, spraying, and disassembly can be simplified. By controlling the ambient temperature and humidity range, the fluidity and adhesion of the high-temperature enamel are guaranteed. By allowing installation in a rotated and tilted state, the inner surface of the flame tube 18 is free of spraying blind spots, achieving 100% coverage.
[0033] The following is a further detailed description of the tooling and method for spraying a complex structure annular flame tube according to the present invention through specific embodiments.
[0034] The tooling and spraying method for complex structure annular flame tube spraying of the present invention are suitable for high temperature enamel coating on the inner surface of complex structure annular flame tube, so as to meet the requirements of high temperature enamel spraying process of complex structure annular flame tube of aircraft engine. The specific invention content is as follows: The tooling for complex structure annular flame tube spraying includes flame tube tooling, long rod spray gun and conventional spray gun.
[0035] During the assembly of the flame tube tooling, first remove the pressure cover 9 of the flame tube spray tooling, then clamp the flame tube on the flame tube tooling, connect the bell mouth of the flame tube 18 head to the positioning ring 3 of the flame tube tooling and position the flame tube 18, then install the pressure cover 9, fix the flame tube 18 on the flame tube tooling, and make the flame tube 18 rotate in the air at an angle of 30° to the horizontal plane, and keep it in a free rotation state to facilitate the operator to spray high-temperature enamel. After the assembly of the flame tube spray tooling is completed, push the flame tube to the paint spray room via the casters 12, ready to spray high-temperature enamel.
[0036] In the spraying of the flame tube 18, prepare a long-pole spray gun and a conventional spray gun, which need to be used in combination. Put the prepared high-temperature enamel into the paint box of the long-pole spray gun, and keep the spraying environment of the high-temperature enamel in the range of temperature 15℃~30℃ and relative humidity 35%~60℃. First, extend the long-pole spray gun from the bell mouth of the small end of the flame tube 18, and spray the prepared high-temperature enamel on the grooves and corners of the inner surface of the large end of the flame tube 18. There are 24 bell mouths in a circle of the small end. The long-pole spray gun completes the spraying from the small end side from the 24 bell mouths in turn, and then extend the long-pole spray gun from the bell opening of the large end of the flame tube 18, and spray the prepared high-temperature enamel on the grooves and corners of the inner surface of the small end. The coating tool rotates, and by rotating the spray tool one circle, the grooves and corners on the inner surface of the small end of the flame tube 18 can be sprayed. The conventional spray gun is replaced, and the prepared high-temperature enamel is loaded into the paint box of the conventional spray gun. The conventional spray gun is sprayed from the large end flare opening of the flame tube 18, and it is swung at an angle of 30° to the vertical direction. By coordinating with the rotation of the flame tube spray tool, the flame tube spray tool can be rotated one circle to complete the large surface areas on the left and right sides of the inner surface of the flame tube 18. The above spraying method is used in conjunction with the flame tube spray tool, the long-pole spray gun and the conventional spray gun to complete the spraying of the inner surface of the flame tube 18, ensuring 100% coverage of the enamel layer on the inner surface of the flame tube 18 and ensuring the reliability of the product.
[0037] In summary, the present invention provides a tool and method for spraying an annular flame tube with a complex structure. The tool forms a positioning system by tilting the support surface, and allows the flame tube to rotate freely in mid-air, exposing hidden areas such as grooves and welds on the inner wall. A long-pole spray gun is used to spray holes or corners, and a conventional spray gun efficiently covers large surfaces. The tool is adapted to the 24 bell mouths and non-continuous surface structure of the flame tube, thereby improving the coverage and efficiency of the spraying. The present invention guarantees the adhesion of the enamel by limiting the parameters of the environment, combining the design of the tool and the spraying process, and ensures that the complex inner surface is sprayed without dead angles by the combination of the rotating inclination angle, the long-pole spray gun, and the conventional spray gun; precise coverage prevents the enamel from falling off, and reduces the number of reworks on the workpiece; and the convenience of the tool movement and assembly and disassembly improves the operating efficiency, meeting the high reliability and high efficiency requirements of the parts.
[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in this industry can smoothly implement the present invention as shown in the specification and described above. Any equivalent changes, modifications and evolutions made by using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.
Claims
1. A tool for spraying a complex structure annular flame tube, characterized in that: Including flame tube tooling, long pole spray gun and conventional spray gun; among which: The flame tube tooling comprises a base unit, a support (2) is provided on the base unit, the support (2) has a mounting panel, and the mounting panel is provided with a flame tube positioning assembly along the thickness direction thereof, and the flame tube positioning assembly can cooperate with the support (2) to install the flame tube to be installed; The flame tube positioning assembly includes a positioning ring (3), the positioning ring (3) is installed on the installation panel along its axial direction, a rotating shaft (4) is provided through the support (2) and the positioning ring (3), the rotating shaft (4) is coaxially connected to the positioning ring (3), one end of the rotating shaft (4) is provided with a free rotation assembly, and the other end is connected to a fixed assembly; in the installed state, the fixed assembly can fix the flame tube to be installed, and the free rotation assembly can drive the rotating shaft (4) to rotate, so as to drive the flame tube to be installed to rotate; The rotating shaft (4) can place the flame tube to be installed in an inclined state with a preset inclination angle relative to the horizontal plane, and keep the flame tube to be installed in a freely rotating state, so that the long-pole spray gun and the conventional spray gun can spray the flame tube to be installed at different angles.
2. The tooling for spraying annular flame tube with complex structure according to claim 1 is characterized in that: The fixing assembly comprises a pressure cover (9), which is mounted on an end of a positioning ring (3) away from a mounting panel via a plurality of supports (10). In the mounted state, the flame tube to be mounted is located between the pressure cover (9) and the positioning ring (3) and is fixed to the rotating shaft (4).
3. The tooling for spraying annular flame tube with complex structure according to claim 2 is characterized in that: The gland (9), the pillar (10), the positioning ring (3) and the mounting panel are connected in a detachable manner.
4. The tooling for spraying annular flame tube with complex structure according to claim 1 is characterized in that: The free-rotation assembly is located at one end of the mounting panel away from the positioning ring (3), and comprises a bearing (16) connected to the rotating shaft (4), a first bushing (5) sleeved on the rotating shaft (4), a washer (6), and a second bushing (7).
5. The tooling for spraying annular flame tube with complex structure according to claim 1 is characterized in that: The rotating shaft (4) is detachably arranged on the free-rotating component.
6. The tooling for spraying annular flame tube with complex structure according to claim 1 is characterized in that: The positioning ring (3) is provided with a connection structure adapted to the shape of the flame tube to be installed.
7. The tooling for spraying annular flame tube with complex structure according to claim 1 is characterized in that: The base unit comprises a base (1) and a plurality of casters (12) arranged at the bottom of the base (1).
8. The tooling for spraying annular flame tube with complex structure according to claim 7 is characterized in that: The support (2) comprises an inclined support surface connected to the mounting panel, and the inclined support surface is connected to the support (2) via a bottom plate (11).
9. A method for spraying a complex structure annular flame tube, characterized in that: The method is carried out based on the tooling for spraying the complex structure annular flame tube according to any one of claims 1 to 8, and comprises the following steps: S1. Clamp the flame tube to be installed on the tooling for spraying the complex structure annular flame tube to form the tooling for spraying, so that the flame tube to be installed is tilted at a preset angle to the horizontal plane, so that the flame tube to be installed is in a state where it can rotate freely; S2. Move the tooling to be sprayed to a preset spraying position, load the prepared high-temperature enamel into a long-pole spray gun and a conventional spray gun, preset the ambient temperature and humidity, and spray the flame tube to be installed in the tooling to be sprayed using the long-pole spray gun and the conventional spray gun; S3. After the spraying of the flame tube to be installed is completed, the flame tube to be installed is taken out by disassembling the tooling to be sprayed, and the spraying operation of the flame tube to be installed is completed.
10. The method for spraying a complex structure annular flame tube according to claim 9, characterized in that: In S2, the preset ambient temperature and humidity parameters are as follows: The ambient temperature is controlled at 15℃~30℃, and the ambient humidity is controlled at 35%~60%.