High-pressure-resistant composite stainless steel pipe for aerospace and machining equipment thereof

Abstract

The invention discloses a high-pressure-resistant composite stainless steel pipe for aerospace and machining equipment thereof, a spaceflight steel pipe body comprises a lining layer, a wear-resistant layer, a main pressure-bearing layer, a buffer layer, a protective layer, connecting threaded holes, gaskets and connecting bolts, the wear-resistant layer is mounted on the outer side of the lining layer, and the main pressure-bearing layer is mounted on the outer side of the wear-resistant layer; the buffer layer is mounted on the outer side of the main pressure-bearing layer, and the protective layer is mounted on the outer side of the buffer layer; the connecting threaded holes are formed in the lining layer, the wear-resistant layer, the main pressure-bearing layer, the buffer layer and the protective layer; the connecting bolts are engaged in the connecting threaded holes through threads, and the connecting bolts are arranged between the protective layer and the connecting bolts. Through the innovative multi-layer material design and the precise assembly process, the performance bottleneck and the assembly problem of a traditional pipeline material are effectively solved, the comprehensive performance and reliability of the pipeline are improved, and the machining efficiency is remarkably improved.

Description

Technical Field

[0001] The invention relates to the field of pipelines for aerospace, and in particular to a high-pressure resistant composite stainless steel pipe for aerospace and processing equipment thereof. Background Art

[0002] In the field of aerospace, the piping system is one of the most important components and is widely used in multiple key systems such as fuel delivery, hydraulic systems, cooling systems, etc. With the continuous development of aerospace technology, pipeline materials not only need to have the basic properties of high strength and high pressure resistance, but also need to meet the following strict requirements: Corrosion resistance: Aerospace vehicles may be exposed to various corrosive media during operation. Pipeline materials must have excellent corrosion resistance to ensure the long-term reliability of the system. Wear resistance: The high-speed flow of fluid in the pipeline may cause wear, so the material is required to have good wear resistance to extend the service life of the pipeline. Thermal expansion performance: Under extreme temperature changes, pipeline materials must have low thermal expansion performance to avoid structural deformation or damage due to inconsistent thermal expansion. Light weight: In aerospace applications, weight reduction is an important design goal, and the material must be as light as possible while ensuring performance.

[0003] Traditional single-material pipes are difficult to meet the above multiple performance requirements at the same time. For example: Although stainless steel pipes have high strength and good corrosion resistance, their wear resistance and thermal expansion performance are relatively poor. Although titanium alloy pipes are lightweight and corrosion-resistant, their strength and wear resistance are not enough to meet the application requirements under extreme conditions. Nickel-based alloy pipes have excellent wear resistance, but their weight is heavy, which is not conducive to the lightweight design of aerospace vehicles. These limitations have prompted researchers to explore multi-layer composite pipes to achieve comprehensive optimization of performance through the synergy of different materials.

[0004] The present invention proposes a high-pressure resistant composite stainless steel pipe for aerospace use, and designs corresponding automated processing equipment. Through innovative multi-layer material design and precise assembly technology, the performance bottleneck and assembly difficulties of traditional pipeline materials are effectively solved. This invention not only improves the comprehensive performance and reliability of the pipeline, but also significantly improves the processing efficiency. It has important practical application value and broad market prospects.

[0005] Therefore, it is very necessary to invent a high-pressure resistant composite stainless steel pipe for aerospace and a processing equipment thereof. Summary of the invention

[0006] The present invention realizes a high-strength, high-pressure, wear-resistant and corrosion-resistant composite stainless steel pipe through a combination design of multi-layer materials and precise processing equipment. The coordinated work of the pipe support structure, positioning structure and screw locking structure ensures the stability and accuracy of the pipe during the assembly process, improves processing efficiency and product quality. This composite stainless steel pipe has broad application prospects in the aerospace field and can meet the use requirements in extreme environments.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: wherein: the main body of the aerospace steel pipe includes: an inner lining layer, a wear-resistant layer, a main pressure-bearing layer, a buffer layer, a protective layer, a connecting threaded hole, a gasket and a connecting bolt, and the wear-resistant layer is installed on the outside of the inner lining layer, and the main pressure-bearing layer is installed on the outside of the wear-resistant layer; the buffer layer is installed on the outside of the main pressure-bearing layer, and the protective layer is installed on the outside of the buffer layer; the connecting threaded hole is opened in the inner lining layer, the wear-resistant layer, the main pressure-bearing layer, the buffer layer and the protective layer; the connecting bolt is engaged in the inside of the connecting threaded hole through a thread, and the connecting bolt is arranged between the protective layer and the connecting bolt.

[0008] A processing equipment for high-pressure resistant composite stainless steel pipes for aerospace use, characterized in that it includes a bottom base plate, a support back plate, an extension plate, two side support seats, a sliding rod, a pipeline support structure, a driving push rod, a positioning structure and a screw locking structure, and the support back plate is fixedly installed at the rear of the bottom base plate, and the extension plate is fixedly installed above the support back plate; the two side support seats are fixedly installed on both sides of the bottom base plate, and the sliding rods are respectively fixedly installed inside the two groups of two side support seats, and the pipeline support structure is respectively slidably installed on the two groups of sliding rods; the two ends of the driving push rod are respectively connected to the inner walls of the two side support seats and the pipeline support structure, and the positioning structure is fixedly installed on the surface of the bottom base plate, and the screw locking structure is fixedly installed on the surface of the extension plate; the aerospace steel pipe body is arranged between the two groups of pipeline support structures.

[0009] The pipeline support structure includes a supporting base, a rotating support, a force-applying support, a tightening push rod and a clamping column, and the supporting base is slidably mounted on two sets of sliding rods respectively, and a driving push rod is connected and installed between the supporting base and the inner wall of the supporting base; the rotating support is rotatably mounted on the inner side of the top of the supporting base through a bearing, and is connected to the output shaft of the motor on the outer side of the top of the supporting base; the force-applying support is fixedly mounted on the inner side of the rotating support, and the tightening push rod is fixedly mounted on the inner wall of the force-applying support, and the clamping column is fixedly mounted on the inner side of the tightening push rod.

[0010] The positioning structure includes a mounting base, a give-way push rod, a connecting seat, a supporting base and a positioning bolt, and the mounting base is fixedly mounted on the surface of the bottom substrate, and the give-way push rod is fixedly mounted above the mounting base; the connecting seat is fixedly mounted on the top of the give-way push rod, and the supporting base is fixedly mounted on the surface of the connecting seat, and the positioning bolt is fixedly mounted on the surface of the supporting base.

[0011] The screw locking structure includes a mounting plate, a sliding frame, a screw locking machine and a push rod, and the mounting plate is fixedly mounted on the surface of the extension plate, and the sliding frame is slidably mounted on the mounting plate; the screw locking machine is fixedly mounted inside the sliding frame, and both ends of the push rod are fixedly mounted between the mounting plate and the sliding frame.

[0012] The inner lining layer inside the main body of the aerospace steel pipe is the inner layer, and a titanium alloy pipe is used; the wear-resistant layer is the second layer, and a nickel-based alloy pipe is used; the main pressure-bearing layer is the third layer, and a high-strength stainless steel pipe is used; the buffer layer is the fourth layer, and a lnvar36 low thermal expansion alloy pipe is used; the protective layer is the outermost layer, and a 904lL corrosion-resistant stainless steel pipe is used; the connecting threaded hole passes through the wear-resistant layer, the main pressure-bearing layer, the buffer layer and the protective layer, and the connecting threaded hole penetrates half of the inner lining layer. The inner lining layer can provide excellent corrosion resistance and biocompatibility. Titanium alloy is lightweight, high-strength and has excellent corrosion resistance. It is suitable for contact with various chemicals and fluids. Therefore, it can effectively protect the inner lining layer. Protect the internal fluid or gas from corrosion; its internal wear-resistant layer can provide high wear resistance and oxidation resistance. Nickel-based alloys can maintain stable mechanical properties in high temperature and harsh environments, and are suitable for use in situations where wear resistance and high temperature resistance are required. As a wear-resistant layer, it can protect the pipeline from wear in high-velocity and particulate-containing fluids, and prevent the lining from being damaged by wear, and it can also play a protective role; its internal main pressure-bearing layer can provide the main mechanical strength and pressure-bearing capacity. High-strength stainless steel has extremely high strength and corrosion resistance. It is the main pressure-bearing layer of the pipeline structure, ensuring that the pipeline can withstand the action of high-pressure fluids without deformation or rupture; its internal buffer layer can provide thermal expansion buffering and thermal stability. Invar Alloy 36 has an extremely low coefficient of thermal expansion and can maintain dimensional stability when the temperature changes. As a buffer layer, it can effectively relieve the stress caused by temperature changes, thereby protecting the structural integrity of the pipeline; its internal protective layer can provide external protection and corrosion resistance. 904L stainless steel has extremely high corrosion resistance, especially in acidic environments. As the outermost protective layer, it can protect the entire pipeline structure from external corrosion and mechanical damage; it can provide multiple protections: the cooperation between the layers provides multiple protections from the inside to the outside, so that the pipeline can still maintain excellent performance in complex and extreme working environments; it can withstand high pressure, and the main pressure-bearing layer provides the main mechanical strength to ensure that the pipeline can withstand high pressure, while other layers provide additional functional support; it can be applied to the environment, the diversity of materials and the layered design of functions enable the pipeline to adapt to various physical and chemical challenges that may be encountered in the aerospace environment; through the combination and complementarity of the materials of each layer, the overall structure can remain stable under various stress conditions, and is not prone to deformation, fracture or other failures. The layers are fastened and connected by connecting bolts to prevent them from falling off during use, further improving safety.

[0013] The clamping column inside the pipeline support structure adopts four steel metal columns, and the outside of the clamping column is wrapped with a layer of rubber pad. The clamping column can be moved inward or outward by the tightening push rod; the clamping column can be rotated by the rotation of the rotating support and the force support; the tightening push rod adopts four sets of electric push rods; the rotating support and the force support are rotated by the motor on the outside of the support base plate; the support base plate is driven by the driving push rod to reciprocate on the surface of the sliding rod to provide stable support and precise positioning to ensure that the main body of the aerospace steel pipe does not displace or deform during the processing, assembly and handling process, and it can achieve the pipe The clamping, rotation and movement of the pipeline can maintain high precision and high quality during chemical bonding and other processing; the support base plate serves as the basis of the pipeline support structure, providing overall support and stability. The support base plate is slidably installed on the slide rod and horizontal movement is achieved by driving the push rod, so that the clamping column can be easily extended into or out of the interior of the aerospace steel pipe body; the rotating support and the force support are rotated 45 degrees at a time by the stepper motor to ensure that each connecting threaded hole inside the aerospace steel pipe body can face directly upward to facilitate the installation of the connecting bolts; the tightening push rod and the clamping column can tighten the aerospace steel pipe body to drive the aerospace steel pipe body to rotate 45 degrees several times.

[0014] The support base inside the positioning structure adopts a metal plate with an arc, and its arc is consistent with the arc of the aerospace steel pipe body, and the outer side of the support base is wrapped with a layer of rubber pad. The bottom of the support base forms a plane through the connecting seat and is connected to the give-way push rod; the support base can reciprocate in the vertical direction through the give-way push rod, and the positioning bolts adopt a number of metal cylinders protruding outward, the spacing between the positioning bolts is consistent with the connecting threaded holes inside the aerospace steel pipe body, and its properties match the connecting threaded holes inside the aerospace steel pipe body, which can provide precise positioning and fixation to ensure that the aerospace steel pipe body maintains stable and precise positioning during the entire processing process, and it can move in the vertical direction to ensure that the rotation of the aerospace steel pipe body is not affected by it; the installation base is used as The basic component of the positioning structure is fixedly installed on the bottom substrate to provide stable support for the entire positioning structure; the give-way push rod is fixedly installed above the mounting base, and the positioning structure is adjusted in the vertical direction through the movement of the give-way push rod. The give-way push rod can be moved up or down as needed to adjust the height and position of the supporting base so that the positioning structure will not interfere with the rotation of the aerospace steel pipe body; the supporting base is used to support the aerospace steel pipe body, and the curvature design of the supporting base matches the shape of the pipe, and is wrapped with a rubber pad to provide a soft contact surface to prevent damage to the pipe surface; the positioning bolt The positioning bolt matches the connecting threaded holes on the aerospace steel pipe body to ensure the precise positioning and fixation of the pipe, and after connection, a group of connecting threaded holes inside the aerospace steel pipe body must face directly upward to facilitate the installation of bolts.

[0015] The screw locking structure as a whole is a screw locking device, and a connecting bolt is placed inside the screw locking structure. The screw locking structure can screw the connecting bolt into the connecting threaded hole just above the aerospace steel pipe body, and automatically screw the connecting bolt into the connecting threaded hole of the aerospace steel pipe body to ensure that the various layers of the pipeline are tightly connected and fixed. This structure improves processing efficiency and connection quality, and ensures the stability and reliability of the pipeline structure under high pressure and complex environments.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The configuration of the aerospace steel pipe body of the present invention, the inner lining layer can provide excellent corrosion resistance and biocompatibility, titanium alloy has light weight, high strength and excellent corrosion resistance, suitable for contact with various chemicals and fluids, so as an inner lining layer can effectively protect the internal fluid or gas from corrosion; the wear-resistant layer inside can provide high wear resistance and oxidation resistance, nickel-based alloy can maintain stable mechanical properties in high temperature and harsh environment, suitable for use in occasions requiring wear resistance and high temperature resistance, as a wear-resistant layer, it can protect the pipeline from being worn in high flow rate and fluid containing particulate matter, and prevent the inner lining from being damaged by wear, and can also play a protective role; the main pressure-bearing layer inside can provide the main mechanical strength and pressure-bearing capacity, high-strength stainless steel has extremely high strength and corrosion resistance, is the main pressure-bearing layer of the pipeline structure, ensures that the pipeline can withstand the action of high-pressure fluid without deformation or rupture; the internal buffer layer can provide thermal expansion buffer and thermal stability, Invar Alloy 36 has an extremely low coefficient of thermal expansion and can maintain dimensional stability when the temperature changes. As a buffer layer, it can effectively relieve the stress caused by temperature changes, thereby protecting the structural integrity of the pipeline; its internal protective layer can provide external protection and corrosion resistance. 904L stainless steel has extremely high corrosion resistance, especially in acidic environments. As the outermost protective layer, it can protect the entire pipeline structure from external corrosion and mechanical damage; it can provide multiple protections: the cooperation between the layers provides multiple protections from the inside to the outside, so that the pipeline can still maintain excellent performance in complex and extreme working environments; it can withstand high pressure, and the main pressure-bearing layer provides the main mechanical strength to ensure that the pipeline can withstand high pressure, while other layers provide additional functional support; it can be applied to the environment, the diversity of materials and the layered design of functions enable the pipeline to adapt to various physical and chemical challenges that may be encountered in the aerospace environment; through the combination and complementarity of the materials of each layer, the overall structure can remain stable under various stress conditions, and is not prone to deformation, fracture or other failures. The layers are fastened and connected by connecting bolts to prevent them from falling off during use, further improving safety.

[0018] 2. The setting of the pipeline support structure of the present invention is used to provide stable support and precise positioning to ensure that the aerospace steel pipe body does not move or deform during the processing, assembly and handling. It can realize the clamping, rotation and movement of the pipeline, so that high precision and high quality can be maintained during chemical bonding and other processing processes; the support base plate serves as the basis of the pipeline support structure, providing overall support and stability. The support base plate is slidably installed on the sliding rod and horizontal movement is achieved by driving the push rod, so that the clamping column can be easily extended into or out of the interior of the aerospace steel pipe body; the rotating support and the force support are rotated 45 degrees at a time by a stepper motor to ensure that each connecting threaded hole inside the aerospace steel pipe body can face directly upward to facilitate the installation of the connecting bolts; the tightening push rod and the clamping column can tighten the aerospace steel pipe body to drive the aerospace steel pipe body to rotate 45 degrees several times.

[0019] 3. The setting of the positioning structure of the present invention can provide precise positioning and fixation to ensure that the aerospace steel pipe body maintains stable and precise positioning during the entire processing process. It can move in the vertical direction to ensure that the rotation of the aerospace steel pipe body is not affected by it; the mounting base is fixedly mounted on the bottom substrate as the basic component of the positioning structure to provide stable support for the entire positioning structure; the give-way push rod is fixedly mounted above the mounting base, and the adjustment of the positioning structure in the vertical direction is achieved through the movement of the give-way push rod. The give-way push rod can be moved up or down as needed to adjust the height and position of the supporting base so that the positioning structure will not interfere with the rotation of the aerospace steel pipe body; the supporting base is used to support the aerospace steel pipe body, and the curvature design of the supporting base matches the shape of the pipeline, and is wrapped with a rubber pad to provide a soft contact surface to prevent damage to the pipeline surface; the positioning bolt The positioning bolt matches the connecting threaded hole on the aerospace steel pipe body to ensure precise positioning and fixation of the pipeline, and after connection, a group of connecting threaded holes inside the aerospace steel pipe body must face directly upward to facilitate the installation of bolts.

[0020] 4. The setting of the screw locking structure of the present invention automatically screws the connecting bolts into the connecting threaded holes of the aerospace steel pipe body to ensure that the various layers of the pipeline are tightly connected and fixed. This structure improves the processing efficiency and connection quality, and ensures the stability and reliability of the pipeline structure under high pressure and complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the aerospace steel pipe body of the present invention.

[0022] Figure 2 It is a schematic diagram of the processing structure of the aerospace steel pipe body of the present invention.

[0023] Figure 3 It is a schematic diagram of the lower structure of the aerospace steel pipe main body processing structure of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the pipeline support structure of the present invention.

[0025] Figure 5 It is a structural schematic diagram of the positioning structure of the present invention.

[0026] Figure 6 It is a structural schematic diagram of the screw locking structure of the present invention.

[0027] In the figure:

[0028] Aerospace steel pipe body 1, lining layer 11, wear-resistant layer 12, main pressure-bearing layer 13, buffer layer 14, protective layer 15, connecting threaded hole 16, gasket 17, connecting bolt 18, bottom base plate 2, supporting back plate 3, extension plate 4, two side support seats 5, slide rod 6, pipeline support structure 7, supporting base plate 71, rotating support 72, force support 73, tightening push rod 74, clamping column 75, driving push rod 8, positioning structure 9, mounting base 91, giving way push rod 92, connecting seat 93, supporting base 94, positioning bolt 95, screw locking structure 10, mounting plate 101, sliding frame 102, screw locking machine 103, pressing push rod 104. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] As attached Figure 1-6 As shown:

[0031] The present invention provides a high-pressure resistant composite stainless steel pipe for aerospace and its processing equipment, wherein: the aerospace steel pipe body 1 includes: an inner lining layer 11, a wear-resistant layer 12, a main pressure-bearing layer 13, a buffer layer 14, a protective layer 15, a connecting threaded hole 16, a gasket 17 and a connecting bolt 18, and the wear-resistant layer 12 is installed on the outside of the inner lining layer 11, and the main pressure-bearing layer 13 is installed on the outside of the wear-resistant layer 12; the buffer layer 14 is installed on the outside of the main pressure-bearing layer 13, and the protective layer 15 is installed on the outside of the buffer layer 14; the connecting threaded hole 16 is opened inside the inner lining layer 11, the wear-resistant layer 12, the main pressure-bearing layer 13, the buffer layer 14 and the protective layer 15; the connecting bolt 18 is threadedly engaged inside the connecting threaded hole 16, and the connecting bolt 18 is arranged between the protective layer 15 and the connecting bolt 18.

[0032] A processing equipment for high-pressure resistant composite stainless steel pipes for aerospace use, characterized in that it includes a bottom substrate 2, a support back plate 3, an extension plate 4, two side support seats 5, a slide rod 6, a pipeline support structure 7, a drive push rod 8, a positioning structure 9 and a screw locking structure 10, and the support back plate 3 is fixedly installed at the rear of the bottom substrate 2, and the extension plate 4 is fixedly installed above the support back plate 3; the two side support seats 5 are fixedly installed on both sides of the bottom substrate 2, and the slide rods 6 are respectively fixedly installed inside the two groups of two side support seats 5, and the pipeline support structure 7 is respectively slidably installed on the two groups of slide rods 6; the two ends of the drive push rod 8 are respectively connected to the inner walls of the two side support seats 5 and the pipeline support structure 7, and the positioning structure 9 is fixedly installed on the surface of the bottom substrate 2, and the screw locking structure 10 is fixedly installed on the surface of the extension plate 4; the aerospace steel pipe body 1 is arranged between the two groups of pipeline support structures 7.

[0033] The pipeline support structure 7 includes a supporting base plate 71, a rotating support 72, a force-applying support 73, a tightening push rod 74 and a clamping column 75, and the supporting base plate 71 is slidably installed on two groups of sliding rods 6 respectively, and a driving push rod 8 is connected and installed between the supporting base plate 71 and the inner wall of the supporting base 5; the rotating support 72 is rotatably installed on the inner side of the top of the supporting base plate 71 through a bearing, and is connected to the output shaft of the motor on the outer side of the top of the supporting base plate 71; the force-applying support 73 is fixedly installed on the inner side of the rotating support 72, and the tightening push rod 74 is fixedly installed on the inner wall of the force-applying support 73, and the clamping column 75 is fixedly installed on the inner side of the tightening push rod 74.

[0034] The positioning structure 9 includes a mounting base 91, a give-way push rod 92, a connecting seat 93, a supporting base 94 and a positioning bolt 95, and the mounting base 91 is fixedly mounted on the surface of the bottom substrate 2, and the give-way push rod 92 is fixedly mounted above the mounting base 91; the connecting seat 93 is fixedly mounted on the top of the give-way push rod 92, and the supporting base 94 is fixedly mounted on the surface of the connecting seat 93, and the positioning bolt 95 is fixedly mounted on the surface of the supporting base 94.

[0035] The screw locking structure 10 includes a mounting plate 101, a sliding frame 102, a screw locking machine 103 and a push rod 104, and the mounting plate 101 is fixedly mounted on the surface of the extension plate 4, and the sliding frame 102 is slidably mounted on the mounting plate 101; the screw locking machine 103 is fixedly mounted inside the sliding frame 102, and both ends of the push rod 104 are fixedly mounted between the mounting plate 101 and the sliding frame 102.

[0036] The inner lining layer 11 inside the aerospace steel pipe body 1 is the inner layer, and a titanium alloy pipe is used; the wear-resistant layer 12 is the second layer, and a nickel-based alloy pipe is used; the main pressure-bearing layer 13 is the third layer, and a high-strength stainless steel pipe is used; the buffer layer 14 is the fourth layer, and a lnvar36 low thermal expansion alloy pipe is used; the protective layer 15 is the outermost layer, and a 904lL corrosion-resistant stainless steel pipe is used; the connecting threaded hole 16 passes through the wear-resistant layer 12, the main pressure-bearing layer 13, the buffer layer 14 and the protective layer 15, and the connecting threaded hole 16 penetrates half of the inner lining layer 11.

[0037] The clamping column 75 inside the pipeline support structure 7 adopts four steel metal columns, and the outer side of the clamping column 75 is wrapped with a layer of rubber pad. The clamping column 75 can be moved outward or inward by the tightening push rod 74; the clamping column 75 can be rotated by the rotation of the rotating support 72 and the force support 73; the tightening push rod 74 adopts four groups of electric push rods; the rotating support 72 and the force support 73 are rotated by the motor on the outer side of the support base plate 71; the support base plate 71 is driven by the driving push rod 8 to slide back and forth on the surface of the slide rod 6.

[0038] The support base 94 inside the positioning structure 9 adopts a metal plate with an arc, and its arc is consistent with the arc of the aerospace steel pipe body 1, and the outer side of the support base 94 is wrapped with a layer of rubber pad. The bottom of the support base 94 forms a plane through the connecting seat 93 and is connected to the give-way push rod 92; the support base 94 can reciprocate in the vertical direction through the give-way push rod 92, and the positioning bolts 95 adopt a plurality of outwardly protruding metal cylinders, and the spacing between the positioning bolts 95 is consistent with the connecting threaded holes 16 inside the aerospace steel pipe body 1, and its properties match the connecting threaded holes 16 inside the aerospace steel pipe body 1.

[0039] The screw locking structure 10 as a whole is a screw locking device, and a connecting bolt 18 is placed inside the screw locking structure 10 . The screw locking structure 10 can screw the connecting bolt 18 into the inside of the connecting threaded hole 16 just above the aerospace steel pipe body 1 .

[0040] The present invention relates to a high-pressure resistant composite stainless steel pipe for the aerospace field, and its design goal is to provide a high-strength, high-pressure resistant, wear-resistant and corrosion-resistant pipe to meet the application requirements in extreme environments. The composite stainless steel pipe is composed of multiple layers of materials, each layer of which has specific functions and characteristics, and the excellent performance of the overall pipe is achieved through precise processing and assembly technology.

[0041] Structural composition

[0042] 1. Lining layer 11: Titanium alloy pipe, providing excellent corrosion resistance.

[0043] 2. Wear-resistant layer 12: Nickel-based alloy pipe, providing high-strength wear resistance.

[0044] 3. Main pressure-bearing layer 13: High-strength stainless steel pipe, providing the main pressure-bearing capacity.

[0045] 4. Buffer layer 14: Invar36 low thermal expansion alloy pipe, providing thermal expansion buffering effect.

[0046] 5. Protective layer 15: 904L corrosion-resistant stainless steel pipe, providing corrosion protection from the external environment.

[0047] In addition, it also includes connecting threaded holes 16, gaskets 17 and connecting bolts 18, which are used to fix and connect the pipelines of each layer.

[0048] Processing equipment structure

[0049] 1. Bottom substrate 2: provides overall support.

[0050] 2. Support back panel 3: Provide vertical support.

[0051] 3. Extension plate 4: provides upper support.

[0052] 4. Support seats 5 on both sides: provide stable support on both sides.

[0053] 5. Sliding rod 6: Provides a sliding track for the pipeline support structure.

[0054] 6. Pipeline support structure 7: to achieve the fixation and rotation of the pipeline.

[0055] 7. Driving push rod 8: provides horizontal drive.

[0056] 8. Positioning structure 9: Provides precise vertical positioning and avoidance functions.

[0057] 9. Screw locking structure 10: Automatically lock the connecting bolts.

[0058] How it works

[0059] 1. Pipeline assembly and fixing

[0060] During the processing, the aerospace steel pipe body 1 is first fixed on the pipeline support structure 7. The pipeline support structure includes a support base plate 71, a rotating support 72, a force support 73, a tightening push rod 74 and a clamping column 75. The support base plate 71 is slidably installed on the slide rod 6 and horizontal movement is achieved by driving the push rod 8.

[0061] The clamping column 75 is driven by the tightening push rod 74 to clamp the supporting base plate 71, and the rotating support 72 is driven by the motor to realize the rotation of the pipeline.

[0062] 2. Multi-layer material installation

[0063] Through the rotation and movement of the pipeline support structure 7, each layer of steel pipes can be fixedly connected together by bolts.

[0064] 3. Positioning and locking

[0065] The positioning structure 9 realizes precise positioning of the pipeline by installing a base 91, a push rod 92, a connecting seat 93, a supporting base 94 and a positioning bolt 95. The push rod 92 provides adjustment in the vertical direction to ensure that the pipeline is not disturbed when rotating.

[0066] The screw locking structure 10 realizes automatic locking through the mounting plate 101, the sliding frame 102, the screw locking machine 103 and the downward push rod 104. The screw locking machine 103 screws the connecting bolt 18 into the connecting threaded hole 16 to ensure the tight connection and fixation of each layer of pipelines.

[0067] in conclusion

[0068] The present invention realizes a high-strength, high-pressure, wear-resistant and corrosion-resistant composite stainless steel pipe through a combination design of multi-layer materials and precise processing equipment. The coordinated work of the pipe support structure, positioning structure and screw locking structure ensures the stability and accuracy of the pipe during the assembly process, improves processing efficiency and product quality. This composite stainless steel pipe has broad application prospects in the aerospace field and can meet the use requirements in extreme environments.

[0069] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure resistant composite stainless steel tube for aerospace use, wherein: The aerospace steel pipe body (1) comprises: an inner lining layer (11), a wear-resistant layer (12), a main pressure-bearing layer (13), a buffer layer (14), a protective layer (15), a connecting threaded hole (16), a gasket (17) and a connecting bolt (18), wherein the wear-resistant layer (12) is installed on the outer side of the inner lining layer (11), and the main pressure-bearing layer (13) is installed on the outer side of the wear-resistant layer (12); the buffer layer (14) is installed on the outer side of the main pressure-bearing layer (13), and the protective layer (15) is installed on the outer side of the buffer layer (14); the connecting threaded hole (16) is provided inside the inner lining layer (11), the wear-resistant layer (12), the main pressure-bearing layer (13), the buffer layer (14) and the protective layer (15); the connecting bolt (18) is threadedly engaged inside the connecting threaded hole (16), and the connecting bolt (18) is provided between the protective layer (15) and the connecting bolt (18).

2. The processing equipment of the high-pressure resistant composite stainless steel pipe for aerospace use according to claim 1, characterized in that: The invention comprises a bottom substrate (2), a supporting back plate (3), an extension plate (4), supporting seats on both sides (5), a sliding rod (6), a pipeline supporting structure (7), a driving push rod (8), a positioning structure (9) and a screw locking structure (10), wherein the supporting back plate (3) is fixedly mounted at the rear of the bottom substrate (2), and the extension plate (4) is fixedly mounted above the supporting back plate (3); the supporting seats on both sides (5) are fixedly mounted at both sides of the bottom substrate (2), and the sliding rod (6) is respectively fixedly mounted inside two groups of supporting seats on both sides (5), and the pipeline supporting structure (7) is respectively slidably mounted on the two groups of sliding rods (6); the two ends of the driving push rod (8) are respectively connected to the inner walls of the supporting seats on both sides (5) and the pipeline supporting structure (7), and the positioning structure (9) is fixedly mounted on the surface of the bottom substrate (2), and the screw locking structure (10) is fixedly mounted on the surface of the extension plate (4); the aerospace steel pipe body (1) is arranged between the two groups of pipeline supporting structures (7).

3. The processing equipment for aerospace high-pressure resistant composite stainless steel pipe according to claim 1, characterized in that: The pipeline support structure (7) comprises a support base (71), a rotating support (72), a force-applying support (73), a tightening push rod (74) and a clamping column (75), and the support base (71) is slidably mounted on two sets of sliding rods (6) respectively, and a driving push rod (8) is connected and mounted between the support base (71) and the inner wall of the support base (5); the rotating support (72) is rotatably mounted on the inner side of the top of the support base (71) through a bearing, and is connected to the output shaft of the motor on the outer side of the top of the support base (71); the force-applying support (73) is fixedly mounted on the inner side of the rotating support (72), and the tightening push rod (74) is fixedly mounted on the inner wall of the force-applying support (73), and the clamping column (75) is fixedly mounted on the inner side of the tightening push rod (74).

4. The processing equipment for aerospace high-pressure resistant composite stainless steel pipe according to claim 1, characterized in that: The positioning structure (9) comprises a mounting base (91), a displacement push rod (92), a connecting seat (93), a supporting base (94) and a positioning bolt (95), wherein the mounting base (91) is fixedly mounted on the surface of the bottom substrate (2), and the displacement push rod (92) is fixedly mounted above the mounting base (91); the connecting seat (93) is fixedly mounted on the top of the displacement push rod (92), and the supporting base (94) is fixedly mounted on the surface of the connecting seat (93), and the positioning bolt (95) is fixedly mounted on the surface of the supporting base (94).

5. The processing equipment for high-pressure resistant composite stainless steel pipe for aerospace use according to claim 1, characterized in that: The screw locking structure (10) comprises a mounting plate (101), a sliding frame (102), a screw locking machine (103) and a push rod (104), wherein the mounting plate (101) is fixedly mounted on the surface of the extension plate (4), and the sliding frame (102) is slidably mounted on the mounting plate (101); the screw locking machine (103) is fixedly mounted inside the sliding frame (102), and both ends of the push rod (104) are fixedly mounted between the mounting plate (101) and the sliding frame (102).

6. The high-pressure resistant composite stainless steel tube for aerospace use according to claim 1, characterized in that: The inner lining layer (11) inside the aerospace steel pipe body (1) is an inner layer and is made of a titanium alloy pipe; the wear-resistant layer (12) is a second layer and is made of a nickel-based alloy pipe; the main pressure-bearing layer (13) is a third layer and is made of a high-strength stainless steel pipe; the buffer layer (14) is a fourth layer and is made of a lnvar36 low thermal expansion alloy pipe; the protective layer (15) is the outermost layer and is made of a 9041L corrosion-resistant stainless steel pipe; the connecting threaded hole (16) penetrates the wear-resistant layer (12), the main pressure-bearing layer (13), the buffer layer (14) and the protective layer (15), and the connecting threaded hole (16) penetrates half of the inner lining layer (11).

7. The processing equipment for high-pressure resistant composite stainless steel pipe for aerospace use according to claim 3, characterized in that: The clamping column (75) inside the pipeline support structure (7) adopts four steel metal columns, and the outer side of the clamping column (75) is wrapped with a layer of rubber pad. The clamping column (75) can be moved outward or inward by the drive of the clamping push rod (74); the clamping column (75) can be rotated by the rotation of the rotating support (72) and the force support (73); the clamping push rod (74) adopts four groups of electric push rods; the rotating support (72) and the force support (73) are rotated by the drive of the motor on the outer side of the support base plate (71); the support base plate (71) is driven by the driving push rod (8) to slide back and forth on the surface of the sliding rod (6).

8. The processing equipment for high-pressure resistant composite stainless steel pipe for aerospace use according to claim 4, characterized in that: The support base (94) inside the positioning structure (9) is made of a metal plate with an arc, and its arc is consistent with the arc of the aerospace steel pipe body (1), and the outer side of the support base (94) is wrapped with a layer of rubber pad. The bottom of the support base (94) forms a plane through the connecting seat (93) and is connected to the give-way push rod (92); the support base (94) can reciprocate in the vertical direction through the give-way push rod (92), and the positioning bolts (95) are made of a plurality of metal cylinders protruding outward, and the spacing between the positioning bolts (95) is consistent with the connecting threaded holes (16) inside the aerospace steel pipe body (1), and their properties match the connecting threaded holes (16) inside the aerospace steel pipe body (1).

9. The processing equipment for high-pressure resistant composite stainless steel pipe for aerospace use according to claim 5, characterized in that: The screw locking structure (10) is a screw locking device as a whole, and a connecting bolt (18) is placed inside the screw locking structure (10). The screw locking structure (10) can screw the connecting bolt (18) into the inside of the connecting threaded hole (16) directly above the aerospace steel pipe body (1).

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