Preparation process and preparation system for superconducting niobium-titanium alloy cast pipe

Abstract

The invention provides a superconducting niobium-titanium alloy cast pipe preparation process and a superconducting niobium-titanium alloy cast pipe preparation system applied to the technical field of superconducting niobium-titanium wire preparation. The superconducting niobium-titanium alloy cast pipe preparation system comprises a guide rail, a traveling trolley capable of moving along the guide rail, and a plurality of working areas sequentially arranged from the input end to the output end along the guide rail; the bottom plate carrying the oxygen-free copper cladding pipe moves between the first tank body and the second tank body in each treatment area, continuous conveying and accurate positioning of the oxygen-free copper cladding pipe are achieved, it is guaranteed that the oxygen-free copper cladding pipe is fixed in a vertical state, and on the basis, the oxygen-free copper cladding pipe is continuously conveyed and accurately positioned through ultrasonic cleaning, strong and weak acid pickling and airflow acid and water color marks are removed through ultrasonic cleaning, strong and weak acid pickling and airflow acid and water color marks. Meanwhile, by means of ultrasonic cleaning, a multi-step pickling process and an anti-dissipation measure, local acid marks and cross contamination are avoided, so that the system can meet the requirements for mechanical and automatic batch production of the oxygen-free copper clad pipes, and the production efficiency is improved. And the preparation quality and the industrial application capability of the superconducting niobium-titanium alloy cast pipe are remarkably improved, and the industrial requirement is met.

Description

Technical Field

[0001] This invention relates to the field of superconducting niobium-titanium wire preparation technology, and specifically to a casting tube equipment, a superconducting niobium-titanium alloy casting tube preparation process and system. Background Technology

[0002] Niobium-titanium superconducting materials are currently the most technologically mature and commercially widely used low-temperature superconducting materials. The wires made from them are widely used to generate high-intensity magnetic fields and are the core basic materials for superconducting magnets in magnetic resonance imaging systems, nuclear magnetic resonance spectrometers, particle accelerators, and controlled nuclear fusion experimental devices.

[0003] In existing technologies, the conventional manufacturing process of niobium-titanium superconducting wires typically includes the following steps: first, preparing a niobium-titanium alloy ingot and an oxygen-free copper clad tube; then assembling the ingot and the oxygen-free copper clad tube into a superconducting niobium-titanium alloy tube; followed by multiple plastic processing and heat treatments to finally obtain the required superconducting wire. Oxygen-free copper is widely used as a stabilizing matrix for superconducting core materials due to its lack of hydrogen embrittlement, high conductivity, excellent processing performance, weldability, corrosion resistance, low-temperature performance, and good compatibility with niobium. Since the inner surface of the oxygen-free copper clad tube is in direct contact with the niobium-titanium alloy ingot, its inner surface quality has a decisive influence on the processing and final performance of the superconducting product.

[0004] Patent application CN115772673A discloses a pickling tank circulating pickling device and method, which discloses that "an upper pickling tank and a lower pickling tank are installed in the pickling tank. The lower pickling tank is divided into a first weak acid zone, a second weak acid zone, a flipping zone, a medium acid zone and a strong acid zone by a partition. Hanging racks are respectively provided above the upper pickling tank and the lower pickling tank for hanging pickling workpieces. A moving track is used to install the hanging racks. A hydraulic cylinder is slidably connected on the moving track. The hanging racks are rotatably connected to the bottom of the hydraulic cylinders. An auxiliary transmission plate is provided between the moving tracks. A hydraulic cylinder is installed at the bottom of the auxiliary transmission plate. A transfer rod is rotatably connected to the bottom of the hydraulic cylinders to transfer the position of the pickling workpieces."

[0005] Traditionally, the internal surface cleaning of oxygen-free copper-clad tubes mainly employs methods such as immersion cleaning or manual wiping, which are inefficient and cannot meet the needs of mass production of superconducting niobium-titanium alloy cast tubes. While the technical solution in the aforementioned patent can improve production efficiency and meet the requirements, it can only effectively pickle the outer surface of wire workpieces and cannot pickle the tubular structure of oxygen-free copper-clad tubes. Furthermore, its inner wall cannot be effectively treated, thus exhibiting certain limitations. Summary of the Invention

[0006] One of the objectives of this invention is to provide a process for preparing superconducting niobium-titanium alloy cast tubes, which solves the problem that the existing acid pickling method for preparing oxygen-free copper-clad tubes for superconducting niobium-titanium alloy cast tubes is only suitable for small-batch operations, and cannot meet the needs of mass production, nor can it meet the technical problem of acid pickling oxygen-free copper-clad tubes.

[0007] The second objective of this invention is to provide a superconducting niobium-titanium alloy casting tube preparation system, which solves the technical problem in the prior art where the acid pickling area of ​​the oxygen-free copper clad tube is not fully covered due to the local position of the tube body being in close contact with the clamping fixture, thus affecting the acid pickling quality of the product.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] A superconducting niobium-titanium alloy casting tube preparation system includes a guide rail and a traveling trolley that can move along the guide rail; multiple working areas are arranged sequentially from the input end to the output end along the guide rail, the working areas including a strong acid pickling area, a first acid removal area, a weak acid pickling area, a second acid removal area, a water washing area, and a hot air drying area; multiple first tanks and second tanks are arranged below the guide rail;

[0010] It also includes an oxygen-free copper clad tube clamping assembly, which includes a circular base plate with multiple circumferentially distributed water passage holes on the periphery of the base plate. A screw is fixedly connected to the inside of the water passage holes by a connecting rib. The lower end of the screw extends to the bottom of the base plate and the upper end protrudes above the base plate. A fixing hole is opened in the center of the base plate, and a connecting rod is fixedly connected in the fixing hole.

[0011] The screw is threaded with a hexagonal nut to abut against the inner wall of the oxygen-free copper clad tube to keep it vertical; the upper surface of the base plate is covered with a sintered mesh layer, the center of which has a second through hole for the connecting rod to pass through, and the periphery of which has a first through hole for the screw to pass through.

[0012] Preferably, the first tank and the second tank are arranged alternately, and the diameter of the second tank is larger than the diameter of the first tank, with each tank respectively located in the working area.

[0013] Preferably, a first enclosure plate is fixedly connected to the bottom of the second tank body. The first enclosure plate and the bottom wall of the second tank body form a cavity structure. The center of the inner bottom wall of the first enclosure plate protrudes upward. An air nozzle is fixedly connected to the center of the bottom of the first enclosure plate for inputting cold or hot air into the cavity. Multiple air passage holes are opened at the bottom of the second tank body corresponding to the position of the first enclosure plate. Multiple second return pipes connecting to the inside of the first enclosure plate are provided at the periphery of the bottom of the first enclosure plate.

[0014] Preferably, the second tank body is further provided with a baffle ring plate, and the bottom of the second tank body is provided with a first return pipe. The baffle ring plate is used to guide the waste liquid returning to the second tank body to the first return pipe.

[0015] Preferably, the hexagonal nut has multiple through-holes.

[0016] Preferably, the upper end of the connecting rod is provided with a hanging lug; the bottom of the traveling trolley is equipped with a telescopic bar by a rotatable connection, and the output end of the telescopic bar is connected to a hook.

[0017] Preferably, a support block is fixedly connected to the upper part of the connecting rod, and an arc-shaped cover is detachably inserted above the support block on the connecting rod.

[0018] Preferably, the diameter of the arc-shaped cover is larger than the diameter of the first tank but smaller than the diameter of the second tank.

[0019] Preferably, a second enclosure plate is fixedly connected to the bottom of the second tank, and the second enclosure plate and the bottom wall of the second tank form a receiving cavity. The first reflux pipe and the second reflux pipe collect the cleaning liquid removed from the oxygen-free copper cladding tube into the receiving cavity. A circulation pump and a circulation pipe are provided between the first tank in the strong acid pickling zone and the second tank in the first acid removal zone, and between the first tank in the acid pickling zone and the second tank in the second acid removal zone.

[0020] A process for manufacturing superconducting niobium-titanium alloy cast tubes includes the following steps:

[0021] S100: Select a suitable size hexagonal nut according to the length and inner diameter of the oxygen-free copper clad tube, and turn it to the fixed height of the screw. Then, put each degreased oxygen-free copper clad tube on each screw and use the hexagonal nut to abut against the inner wall of the screw so that the oxygen-free copper clad tube stands on the upper surface of the sintered mesh layer. Finally, connect the lug and the hook.

[0022] S200: First, use the telescopic bar to lift the oxygen-free copper clad tube, then the traveling trolley carries the oxygen-free copper clad tube to the first tank located in the strong acid washing area, and then uses the telescopic bar to lower the oxygen-free copper clad tube into the first tank to complete the transfer step.

[0023] Then, the oxygen-free copper clad tubes were acid-washed using the strong acid pickling solution inside the first tank of the strong acid pickling zone.

[0024] S300: Repeat the transfer steps, and then deliver cold air from the air nozzle into the second tank located in the first acid removal zone. Use the cold air to blow away the strong acid adhering to the inner and outer walls of the oxygen-free copper clad tube, and keep the inner and outer walls of the oxygen-free copper clad tube relatively clean.

[0025] S400: Repeat the transfer steps, use the weak acid pickling solution inside the first tank of the weak acid pickling zone to pickle the oxygen-free copper clad tube, and use the cold air in the second tank of the second acid removal zone to blow away the weak acid adhering to the inner and outer walls of the oxygen-free copper clad tube, so as to keep the inner and outer walls of the oxygen-free copper clad tube relatively clean.

[0026] S500: Repeat the transfer steps, immerse the oxygen-free copper clad tube in the first tank of the water washing area, and use ultrasonic waves to clean the oxygen-free copper clad tube to remove all attached pickling solution.

[0027] S600: Repeat the transfer steps, and then deliver hot air from the air nozzle into the second tank located in the hot air drying zone. Use the hot air to blow away the strong acid adhering to the inner and outer walls of the oxygen-free copper clad tube and dry it, keeping the inner and outer walls of the oxygen-free copper clad tube completely clean, and obtain the oxygen-free copper clad tube used for superconducting niobium-titanium alloy assembly composite billet.

[0028] The beneficial effects of this invention are:

[0029] 1. This invention integrates automated guide rails and a traveling trolley to move the base plate carrying the oxygen-free copper-clad tube between the first and second tanks within each processing zone, achieving continuous transport and precise positioning of the oxygen-free copper-clad tube and ensuring its vertical fixation. Furthermore, ultrasonic cleaning, strong and weak acid pickling, and airflow removal of acid and water stains effectively improve the consistency of pickling and clamping. Simultaneously, ultrasonic cleaning, multi-step pickling processes, and anti-escape measures prevent localized acid stains and cross-contamination, enabling the system to meet the demands of mechanized and automated mass production of oxygen-free copper-clad tubes. This significantly improves the manufacturing quality and industrial application capabilities of superconducting niobium-titanium alloy cast tubes, satisfying industrialization requirements.

[0030] 2. This invention achieves the function of a clamping fixture through the cooperation of a sintered mesh layer and a hexagonal nut. On the one hand, the porous structure of the sintered mesh layer provides support for the bottom wall of the oxygen-free copper clad tube while minimizing the contact area with the bottom wall, ensuring the integrity of the pickling process. On the other hand, the hexagonal nut provides lateral support to the oxygen-free copper clad tube using its corners, with a very small contact area. This not only does not affect the flow of cleaning fluid and air inside the oxygen-free copper clad tube, but also ensures the integrity of the pickling process on the inner wall of the oxygen-free copper clad tube, which is conducive to obtaining the best pickling effect.

[0031] 3. This invention uses strong acid pickling zones and weak acid pickling zones to pickle the outer wall and main inner wall of oxygen-free copper-clad tubes with tubular structures. This effectively avoids the continued reaction of residual strong acid, which can cause local acid marks and reduce product quality. After alternating between strong and weak acid pickling, cold air blowing is used to effectively solve the problem of cross-contamination of pickling solutions on the inner and outer walls. After pickling, water washing is performed using hot air blowing to effectively solve the problem of residual liquid on the tube wall. This greatly improves the quality and production efficiency of superconducting niobium-titanium alloy cast tubes.

[0032] 4. This invention features multiple staggered first and second tanks. Since the first tanks are used to perform strong acid pickling, weak acid pickling, and water cleaning functions, and the second tanks are used to perform acid removal and water removal functions, the first and second tanks, together with the clamping fixtures that carry oxygen-free copper clad tubes, can complete the pickling process of oxygen-free copper clad tubes. This is beneficial for improving the efficiency of superconducting niobium-titanium alloy casting tube preparation. The equipment is simple, has a high degree of structural homogeneity, is easy to maintain, and has a low cost.

[0033] 5. In this invention, the first enclosure plate and the bottom wall of the second tank body respectively form a cavity for containing pickling solution. The pickling solution removed from the oxygen-free copper cladding tube is collected into the cavity formed by the second enclosure plate and the bottom wall of the second tank body using the first and second return pipes. With the help of the circulation pump and circulation pipe, the pickling solution is returned to the corresponding first tank body, which automatically avoids the waste of pickling solution. The wastewater collected in the receiving cavity in the cleaning area is automatically discharged after treatment without the need for return, thus avoiding affecting the cleaning effect. Attached Figure Description

[0034] The invention will now be further described with reference to the accompanying drawings.

[0035] Figure 1 This is a schematic diagram of the work area layout in this invention;

[0036] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0037] Figure 3 This is a cross-sectional view of the present invention;

[0038] Figure 4 This is a cross-sectional view of the first tank in this invention;

[0039] Figure 5 This is a cross-sectional view of the second tank in this invention;

[0040] Figure 6 This is an exploded view of the base plate and sintered mesh layer in this invention;

[0041] Figure 7 This is a schematic diagram of the fit between the oxygen-free copper clad tube and the hexagonal nut in this invention;

[0042] Figure 8 This is a schematic diagram of the hexagonal nut structure in this invention.

[0043] In the diagram: 1. First tank; 2. Guide rail; 3. Traveling trolley; 4. Telescopic bar; 5. Hook; 6. Hanging lug; 7. Base plate; 8. Water passage hole; 9. Screw; 10. Fixing hole; 11. Sintered mesh layer; 12. First through hole; 13. Second through hole; 14. Connecting rod; 15. Hexagonal nut; 16. Air hole; 17. Arc-shaped cover; 18. Support block; 19. First enclosure plate; 20. Air nozzle; 21. Air passage hole; 22. First return pipe; 23. Baffle ring plate; 24. Second return pipe; 25. Second tank; 26. Second enclosure plate; 27. Circulation pump; 28. Circulation pipe. Detailed Implementation

[0044] 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.

[0045] Please see Figures 1-3 As shown, a superconducting niobium-titanium alloy casting tube preparation system includes a guide rail 2 and a traveling trolley 3 that can move along the guide rail 2. The traveling trolley 3 is used to suspend and transport oxygen-free copper-clad tubes. Multiple working areas are sequentially arranged along the guide rail 2 from the input end to the output end, including a strong acid pickling area, a first acid removal area, a weak acid pickling area, a second acid removal area, a water washing area, and a hot air drying area. It also includes multiple first tanks 1 and second tanks 25 arranged below the guide rail 2. The first tanks 1 and second tanks 25 are arranged alternately, and the diameter of the second tanks 25 is larger than the diameter of the first tanks 1. Each tank is correspondingly located within the aforementioned working areas.

[0046] Please refer to it again. Figures 1-3 As shown, to achieve efficient acid pickling of oxygen-free copper-clad tubes during the fabrication of superconducting niobium-titanium alloy cast tubes, the first tank 1 in the strong acid pickling zone contains a strong acid pickling solution, the first tank 1 in the weak acid pickling zone contains a weak acid pickling solution, and the first tank 1 in the water washing zone contains deionized water. Specifically, the first tank 1 in the water washing zone also integrates an ultrasonic generator for final cleaning of the oxygen-free copper-clad tubes via ultrasonic vibration. This system, by introducing a weak acid pickling step, utilizes the property of weak acid solutions, which are physically intermediate between strong acid and water, to effectively inhibit the continued reaction of residual strong acid and the formation of localized acid marks. This ensures the uniformity of the inner surface quality of the oxygen-free copper-clad tubes, while also widening the process changeover time window and improving operational flexibility.

[0047] Please refer to it again. Figure 5 As shown, to avoid severe cross-contamination between pickling solutions and between water and pickling solution during the casting of superconducting niobium-titanium alloy tubes, two tanks 25 are provided. A first enclosure plate 19 is fixed to the bottom of the second tank 25. The first enclosure plate 19 and the bottom wall of the second tank 25 form a cavity structure. The center of the inner bottom wall of the first enclosure plate 19 protrudes upwards, and an air nozzle 20 is fixed to the center of the bottom of the first enclosure plate 19 for introducing cold or hot air into the cavity. Multiple air passages 21 are provided at the bottom of the second tank 25 corresponding to the position of the first enclosure plate 19 to deliver the introduced cold or hot air into the second tank 25. Multiple second return pipes 24 are provided at the periphery of the bottom of the first enclosure plate 19, connecting to the interior of the first enclosure plate 19. In practical application, cold or hot air is injected into the cavity through the air nozzle 20, and the airflow diffuses into the interior of the second tank 25 through the air passages, thereby performing efficient acid or water removal functions on the oxygen-free copper-clad tube.

[0048] The design of the inner bottom wall center of the first enclosure 19 with an upward convex structure guides the pickling solution or water entering the cavity and discharges it from the second return pipe 24 (a plug is used to seal the air intake) to prevent it from entering the air nozzle 20 (equipped with a one-way valve). The baffle ring 23 allows the waste liquid returning to the second tank 25 to be discharged from the first return pipe 22.

[0049] The bottom of the second tank 25 is also fixedly connected to a second enclosure 26. The second enclosure 26 and the bottom wall of the second tank 25 form a receiving cavity, in which the first return pipe 22 and the second return pipe 24 collect the cleaning liquid removed from the oxygen-free copper cladding tube into the receiving cavity. The air nozzle 20 extends through to the bottom of the second enclosure 26. A circulation pump 27 and a circulation pipe 28 are provided between the first tank 1 in the strong acid pickling zone and the second tank 25 in the first acid removal zone, and between the first tank 1 in the acid pickling zone and the second tank 25 in the second acid removal zone. The two ends of the circulation pipe 28 are connected to the corresponding first tank 1 and the second enclosure 26, respectively. The circulation pump 27 is installed on the circulation pipe 28 to provide a timed pumping effect. In practical applications, the pickling solution removed from the oxygen-free copper clad tube is discharged into the containment cavity through the first return pipe 22 and the second return pipe 24. Then, the strong acid pickling solution or weak acid pickling solution collected in the containment cavity is periodically returned to the corresponding first tank 1 through the circulation pump 27 and circulation pipe 28 (a one-way valve is provided on the circulation pipe 28 to prevent the pickling solution in the first tank 1 from flowing back), which automatically avoids the waste of pickling solution. The wastewater collected in the containment cavity located in the cleaning area is automatically discharged after treatment without the need for backflow, thus avoiding affecting the cleaning effect.

[0050] Please refer to it again. Figure 4 , Figure 5 and Figure 6As shown, in order to transfer the oxygen-free copper-clad tube within each tank during the superconducting niobium-titanium alloy casting process, this superconducting niobium-titanium alloy casting system also includes a circular base plate 7, the upper surface of which is covered with a sintered mesh layer 11. Multiple circumferentially arranged water passage holes 8 (six in this embodiment) are provided around the periphery of the base plate 7. Each water passage hole 8 is fixedly connected to a screw 9 via connecting ribs. The lower end of the screw 9 extends below the base plate 7, and the upper end protrudes above it. A fixing hole 10 is provided in the center of the base plate 7, and a connecting rod 14 is fixedly connected within the fixing hole 10. The upper end of the connecting rod 14 has a lug 6. A second through hole 13 for the connecting rod 14 to pass through is provided in the center of the sintered mesh layer 11, and a first through hole 12 for the screw 9 to pass through is provided around its periphery. A hexagonal nut 15 is threaded onto each screw 9. In application, first adjust the hexagonal nut 15 to the predetermined height on the screw 9 (this height is determined according to the length of the oxygen-free copper clad tube). Then, fit the oxygen-free copper clad tube onto each screw 9. The corner of the hexagonal nut 15 abuts against the inner wall of the oxygen-free copper clad tube, keeping it vertical. This prevents tilting and avoids internal blockage, ensuring smooth airflow or liquid flow. Furthermore, the minimal contact area between the hexagonal nut 15 and the oxygen-free copper clad tube facilitates a uniform pickling effect on the inner wall. The sintered mesh layer 11, with its porous structure, provides support while minimizing the contact area with the bottom wall of the oxygen-free copper clad tube, ensuring the integrity of the bottom wall pickling. Because the oxygen-free copper clad tube remains vertical, when it is removed from the liquid, gravity allows the liquid to flow quickly away from its inner and outer walls. Additionally, the oxygen-free copper clad tube can be positioned directly opposite the air inlet for optimal liquid removal. The clamping fixture functions by cooperating with the sintered mesh layer 11 and the hexagonal nut 15. On the one hand, the porous structure of the sintered mesh layer 11 provides support for the bottom wall of the oxygen-free copper clad tube while minimizing the contact area with the bottom wall, ensuring the integrity of the acid pickling of the bottom wall of the oxygen-free copper clad tube. On the other hand, the hexagonal nut 15 provides lateral support for the oxygen-free copper clad tube by utilizing its corners. The contact area with the oxygen-free copper clad tube is extremely small, which not only does not affect the flow of cleaning fluid and air inside the oxygen-free copper clad tube, but also ensures the integrity of the acid pickling of the inner wall of the oxygen-free copper clad tube, which is conducive to obtaining the best acid pickling effect for the oxygen-free copper clad tube.

[0051] Please refer to it again. Figure 2 and Figure 3 As shown, to support the hoisting operation of oxygen-free copper clad tubes, a telescopic bar 4 is installed at the bottom of the traveling trolley 3 via a rotating connection, and a hook 5 is connected to the output end of the telescopic bar 4. In actual operation, the lug 6 at the upper end of the connecting rod 14 is engaged with the hook 5, and the oxygen-free copper clad tube is hoisted to the top of each tank by the traveling trolley 3. The telescopic bar 4 is used to control its lifting and lowering movement, achieving seamless transfer between tanks.

[0052] Please refer to it again. Figure 7As shown, furthermore, in order to optimize the internal fluid dynamics of the oxygen-free copper clad tube, the hexagonal nut 15 is provided with multiple through vents 16 to enhance the flow of air or liquid.

[0053] Please refer to it again. Figures 3-5 As shown, furthermore, to prevent the pickling solution and deionized water from escaping into the environment under the action of airflow or evaporation, a support block 18 is fixedly connected to the upper part of the connecting rod 14, and an arc-shaped cover 17 is detachably inserted above the support block 18 on the connecting rod 14. The diameter of the arc-shaped cover 17 is larger than the diameter of the first tank 1 but smaller than the diameter of the second tank 25. During the clamping process, the oxygen-free copper cladding tube is fixed first and then the arc-shaped cover 17 is installed to avoid interference. In application, the arc-shaped cover 17 can form a sealing effect on the first tank 1 or constrain the airflow path in the second tank 25, causing the escaping liquid to condense and flow back into the tank, thereby maintaining the cleanliness and safety of the working environment.

[0054] Based on the above-mentioned superconducting niobium-titanium alloy casting tube preparation system, the present invention also provides a superconducting niobium-titanium alloy casting tube preparation process, comprising the following steps:

[0055] S100: Select a suitable size hexagonal nut 15 according to the length and inner diameter of the oxygen-free copper clad tube, and turn it to the fixed height of the screw 9. Then, put each degreased oxygen-free copper clad tube on each screw 9, and use the hexagonal nut 15 to abut against the inner wall of the screw 9 so that the oxygen-free copper clad tube stands on the upper surface of the sintered mesh layer 11. Finally, connect the lug 6 to the hook 5.

[0056] S200: First, use the telescopic bar 4 to lift the oxygen-free copper clad tube, then the traveling trolley 3 carries the oxygen-free copper clad tube to the inside of the first tank 1 located in the strong acid washing area, and then use the telescopic bar 4 to lower the oxygen-free copper clad tube into the inside of the first tank 1 to complete the transfer step.

[0057] Then, the oxygen-free copper clad tube is acid-washed using the strong acid pickling solution inside the first tank 1 of the strong acid pickling zone.

[0058] S300: Repeat the above transfer steps, and then deliver cold air from the air nozzle 20 into the second tank 25 located in the first acid removal zone. Use the cold air to blow away the strong acid adhering to the inner and outer walls of the oxygen-free copper clad tube, and keep the inner and outer walls of the oxygen-free copper clad tube relatively clean.

[0059] S400: Repeat the above transfer steps, use the weak acid pickling solution inside the first tank 1 of the weak acid pickling zone to pickle the oxygen-free copper clad tube, and use the cold air in the second tank 25 in the second acid removal zone to blow away the weak acid adhering to the inner and outer walls of the oxygen-free copper clad tube, so as to keep the inner and outer walls of the oxygen-free copper clad tube relatively clean.

[0060] S500: Repeat the above transfer steps, immerse the oxygen-free copper clad tube in the first tank 1 of the water washing area, and use ultrasonic waves to clean the oxygen-free copper clad tube to remove all attached pickling solution.

[0061] S600: Repeat the above transfer steps, and then deliver hot air from the air nozzle 20 into the second tank 25 located in the hot air drying zone. Use the hot air to blow away the strong acid adhering to the inner and outer walls of the oxygen-free copper clad tube and dry it, keeping the inner and outer walls of the oxygen-free copper clad tube completely clean, and obtain the oxygen-free copper clad tube used for superconducting niobium-titanium alloy assembly composite billet.

[0062] The advantages of this process are as follows: It achieves continuous conveying and precise positioning of oxygen-free copper-clad tubes through the integrated automated guide rail 2 and traveling trolley 3, and sets up multi-station processing areas (including strong acid washing, acid removal, weak acid washing, water washing, and hot air drying). Standardized clamping mechanisms (such as base plate 7, screw 9, and hexagonal nuts 15) ensure the tubes are fixed in a vertical position. Combined with the staggered tank structure and airflow acid removal design, it effectively improves cleaning efficiency and consistency. Simultaneously, ultrasonic cleaning, multi-step acid washing processes, and anti-escape measures (such as arc-shaped covers 17) avoid localized acid marks and cross-contamination, enabling the system to adapt to the needs of mechanized and automated mass production. This significantly improves the manufacturing quality and industrial application capability of superconducting niobium-titanium alloy cast tubes, meeting industrialization requirements.

[0063] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A superconducting niobium-titanium alloy casting tube preparation system, comprising a guide rail (2) and a traveling trolley (3) movable along the guide rail (2); and a plurality of working areas arranged sequentially along the guide rail (2) from the input end to the output end, characterized in that: The working area includes a strong acid washing area, a first acid removal area, a weak acid washing area, a second acid removal area, a water washing area, and a hot air drying area; multiple first tanks (1) and second tanks (25) are provided below the guide rail (2); It also includes an oxygen-free copper clad tube clamping assembly, which includes a circular base plate (7). The base plate (7) has multiple water passage holes (8) arranged in a circular array around its periphery. Each water passage hole (8) is fixedly connected to a screw (9) by a connecting rib. The lower end of the screw (9) extends to the bottom of the base plate (7) and the upper end protrudes above the base plate (7). A fixing hole (10) is opened in the center of the base plate (7), and a connecting rod (14) is fixedly connected in the fixing hole (10). The screw (9) is threaded with a hexagonal nut (15) to abut against the inner wall of the oxygen-free copper clad tube to keep it in a vertical position; the upper surface of the base plate (7) is covered with a sintered mesh layer (11), the center of the sintered mesh layer (11) is provided with a second through hole (13) for the connecting rod (14) to pass through, and the periphery is provided with a first through hole (12) for the screw (9) to pass through.

2. The superconducting niobium-titanium alloy casting tube preparation system according to claim 1, characterized in that: The first tank (1) and the second tank (25) are arranged alternately, and the diameter of the second tank (25) is larger than the diameter of the first tank (1). Each of the tanks is respectively set in the working area.

3. The superconducting niobium-titanium alloy casting tube preparation system according to claim 2, characterized in that: The bottom of the second tank (25) is fixedly connected to a first enclosure plate (19). The first enclosure plate (19) and the bottom wall of the second tank (25) form a cavity structure. The center of the inner bottom wall of the first enclosure plate (19) protrudes upward. An air nozzle (20) is fixedly connected to the center of the bottom of the first enclosure plate (19) for inputting cold or hot air into the cavity. The bottom of the second tank (25) is provided with multiple air passage holes (21) corresponding to the position of the first enclosure plate (19). The bottom periphery of the first enclosure plate (19) is provided with multiple second return pipes (24) connecting the inside of the first enclosure plate (19).

4. The superconducting niobium-titanium alloy casting tube preparation system according to claim 1, characterized in that: The second tank (25) is also provided with a baffle ring plate (23), and the bottom of the second tank (25) is provided with a first return pipe (22). The baffle ring plate (23) is used to guide the waste liquid that returns to the second tank (25) to the first return pipe (22).

5. The superconducting niobium-titanium alloy casting tube preparation system according to claim 1, characterized in that: The hexagonal nut (15) has multiple through-holes (16).

6. The superconducting niobium-titanium alloy casting tube preparation system according to claim 1, characterized in that: The upper end of the connecting rod (14) is provided with a hanging ear (6); the bottom of the traveling trolley (3) is equipped with a telescopic bar (4) by a rotating connection, and the output end of the telescopic bar (4) is connected to a hook (5).

7. The superconducting niobium-titanium alloy casting tube preparation system according to claim 1, characterized in that: The upper part of the connecting rod (14) is fixedly connected to a support block (18), and an arc-shaped cover (17) is detachably inserted on the connecting rod (14) above the support block (18).

8. The superconducting niobium-titanium alloy casting tube preparation system according to claim 7, characterized in that: The diameter of the arc-shaped cover (17) is larger than that of the first tank (1) but smaller than that of the second tank (25).

9. The superconducting niobium-titanium alloy casting tube preparation system according to claim 1, characterized in that: The bottom of the second tank (25) is also fixed with a second enclosure plate (26). The second enclosure plate (26) and the bottom wall of the second tank (25) form a receiving cavity. The first return pipe (22) and the second return pipe (24) collect the cleaning liquid removed from the oxygen-free copper cladding tube into the receiving cavity. A circulation pump (27) and a circulation pipe (28) are provided between the first tank (1) in the strong acid pickling zone and the second tank (25) in the first acid removal zone, and between the first tank (1) in the acid pickling zone and the second tank (25) in the second acid removal zone.

10. A process for manufacturing superconducting niobium-titanium alloy cast tubes, applicable to the superconducting niobium-titanium alloy cast tube manufacturing system according to any one of claims 1-9, characterized in that: Includes the following steps: S100: Select a suitable size hexagonal nut (15) according to the length and inner diameter of the oxygen-free copper clad tube, and turn it to the fixed height of the screw (9). Then, put each degreased oxygen-free copper clad tube on each screw (9), and use the hexagonal nut (15) to abut against the inner wall of the screw (9) so that the oxygen-free copper clad tube stands on the upper surface of the sintered mesh layer (11). Finally, connect the lug (6) to the hook (5). S200: Use the telescopic bar (4) to lift the oxygen-free copper clad tube, and the traveling trolley (3) carries the oxygen-free copper clad tube to the first tank (1) located in the strong acid washing area. Use the telescopic bar (4) to lower the oxygen-free copper clad tube into the first tank (1) to complete the transfer step; use the strong acid washing solution inside the first tank (1) in the strong acid washing area to acid wash the oxygen-free copper clad tube. S300: Repeat the transfer step, and deliver cold air from the air nozzle (20) to the inside of the second tank (25) located in the first acid removal zone, and use the cold air to blow away the strong acid attached to the inner and outer walls of the oxygen-free copper cladding tube. S400: Repeat the transfer steps, use the weak acid pickling solution inside the first tank (1) of the weak acid pickling zone to pickle the oxygen-free copper clad tube, and use the cold air in the second tank (25) in the second acid removal zone to blow away the weak acid adhering to the inner and outer walls of the oxygen-free copper clad tube. S500: Repeat the transfer steps, immerse the oxygen-free copper clad tube in the first tank (1) of the water washing area, and use ultrasonic waves to clean the oxygen-free copper clad tube to remove all attached pickling liquid. S600: Repeat the transfer step, deliver hot air from the nozzle (20) to the inside of the second tank (25) located in the hot air drying zone, use the hot air to blow away the strong acid attached to the inner and outer walls of the oxygen-free copper cladding tube, and dry it.

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