Corrosion-resistant steel pipe and production device thereof

Abstract

The invention relates to the field of metal pipe fitting production, and discloses a corrosion-resistant steel pipe and a production device thereof.The corrosion-resistant steel pipe comprises a steel cylinder used for supporting, the two sides of the steel cylinder are each sequentially connected with a water-resisting layer, a first flexible layer, a second flexible layer, a fiber layer and a rigid layer, and the water-resisting layers, the first flexible layers, the second flexible layers, the fiber layers and the rigid layers are used for protecting the steel cylinder; the damage risk can be reduced, meanwhile, damage caused by impact and blade coating can be reduced through multiple flexible protection, so that internal polytetrafluoroethylene and steel pipes are protected, the overall service life is prolonged, multiple coating agents can be sprayed at a time, procedures during overall machining are reduced, and the service life of the steel pipes is prolonged during spraying. And the steel pipe at the bottom layer is heated, so that various coating agents are rapidly heated and evaporated, and rapid coating spraying processing is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of metal pipe fittings production, and more particularly to corrosion-resistant steel pipes and their production equipment. Background Technology

[0002] Corrosion-resistant steel pipes can be classified into two categories based on their material: 316L stainless steel pipes and polytetrafluoroethylene (PTFE) composite steel pipes. 316L stainless steel pipes are corrosion-resistant metal pipes made with steel as the base material, corresponding to the national standard grade 022Cr17Ni12Mo2, containing 16%–18% chromium, 12%–15% nickel, and 2%–3% molybdenum. They are suitable for pipeline systems in chemical, marine, and food industries. PTFE composite steel pipes use an expanded PTFE inner lining film and a methyl silicone resin adhesive layer structure. However, while PTFE is applied to the individual steel pipe, it is prone to wear during use. After a period of use, this can easily expose the inner steel pipe, leading to corrosion and affecting its service life. Furthermore, current surface processing methods typically employ immersion, requiring multiple immersions for multi-layered structures, necessitating repeated handling of the pipes. This results in numerous processing steps, a long processing time, and reduced overall production efficiency. Summary of the Invention

[0003] To address the technical problem of short corrosion resistance lifespan, this invention provides corrosion-resistant steel pipes and their production equipment.

[0004] The present invention is achieved by the following technical solution: a corrosion-resistant steel pipe, comprising: a steel cylinder for support, wherein a water-proof layer, a first flexible layer, a second flexible layer, a fiber layer and a rigid layer are sequentially connected to both sides of the steel cylinder, and the water-proof layer, the first flexible layer, the second flexible layer, the fiber layer and the rigid layer are used to protect the steel cylinder.

[0005] As a further improvement to the above solution, it includes a support box fixed to the ground, a clamping motion mechanism fixedly connected to the support box, an external spraying mechanism provided on the clamping motion mechanism, and an internal spraying mechanism located on the support box on one side of the clamping motion mechanism. As a further improvement to the above solution, the clamping motion mechanism includes a stabilizing component mounted on a support box, with a processing tube clamped between the stabilizing components. The stabilizing components are used for clamping and rotating the processing tube. A processing component for gas treatment is connected to one side of the stabilizing components, and a support component for supporting the processing tube is also provided at the bottom of the processing tube.

[0006] As a further improvement to the above solution, the stabilizing component includes two support sleeves fixedly connected to the support box. A fixed cylinder is fixedly connected to the support sleeve. Multiple stabilizing columns are fixedly connected to the inner wall of the fixed cylinder, and a stabilizing ring is fixedly connected to the other end of the stabilizing column. A rotating ring is rotatably sleeved on the inner wall of the stabilizing ring. A gear II is fixedly sleeved on the outer side of the rotating ring. A driver for driving the gear II to rotate is also connected to the outer side of the fixed cylinder. A clamp is also connected to one side of the rotating ring. A rotating tube connected to the external spraying mechanism is rotatably sleeved on the outer side of the fixed cylinder. An adjuster fixedly connected to the corresponding support sleeve is connected to the outer side of one of the rotating tubes.

[0007] As a further improvement to the above solution, the driver includes a motor three that is fixedly connected to the fixed cylinder. The output end of the motor three is driven by a gear one. One side of the gear one is driven by a gear three that meshes with a gear two. One end of the gear three is rotatably connected to a protective cover that is fixedly connected to the support sleeve.

[0008] As a further improvement to the above solution, the clamp includes a hydraulic cylinder fixedly connected to the rotating ring, a mating ring fixedly connected to the moving end of the hydraulic cylinder, a contact ring that contacts one end of the processing tube on one side of the mating ring, and multiple coarse cones integrally formed on the side of the contact ring away from the mating ring.

[0009] As a further improvement to the above scheme, the regulator includes a second motor fixedly connected to the support sleeve, a fifth gear connected to the output end of the second motor, and a gear ring fixedly connected to the rotating tube meshing with the outer side of the fifth gear.

[0010] As a further improvement to the above solution, the support assembly includes a guide groove that engages with the support box. A guide rail is provided inside the guide groove, and a slider is slidably arranged inside the guide rail. The slider can slide within the guide rail. Multiple telescopic rods three are fixedly connected to one side of the slider. A support plate is connected to the moving end of the telescopic rods three. Multiple telescopic rods four are rotatably connected inside the support plate. A support frame is fixedly connected to the moving end of the telescopic rods four. A motor four is fixedly connected to one side of the support frame. A drive wheel that is rotatably connected to the support frame is transmitted to the output end of the motor four.

[0011] As a further improvement to the above solution, the processing component includes a vent pipe connected to one of the fixed cylinders, the other end of the vent pipe extending and communicating with a filter box fixedly connected to the support box, a motor connected to one side of the filter box, wherein the filter box is provided with filtrate and filter cotton for gas treatment and filtration, and a drain pipe and a replenishment pipe are also connected to one side of the filter box.

[0012] As a further improvement to the above solution, the internal spraying mechanism includes a raw material box fixedly connected to the support box, a plurality of telescopic rods five fixedly connected to the raw material box, a horizontally arranged guide frame fixedly connected to the moving end of the telescopic rods five, a motor one fixedly connected to one side of the guide frame, a gear four drivenly connected to the output end of the motor one, and a spraying assembly meshed with the gear four. As a further improvement to the above solution, the spray assembly includes multiple rigid tubes connected end to end. The bottom of the rigid tube is provided with a rack that meshes with gear four. One end of the rigid tube is fitted with a counterweight cylinder. One end of the counterweight cylinder is connected to a transverse tube. Multiple spray pipes are connected to the transverse tube. One end of another rigid tube, away from the rigid tube connected to the counterweight cylinder, is connected to a flexible tube. The other end of the flexible tube is connected to a feed pump located in the raw material tank.

[0013] As a further improvement to the above solution, the external spraying mechanism includes an electric slide rail fixedly connected to the rotating tube. The moving end of the electric slide rail is fixedly connected to a telescopic rod, and the other end of the telescopic rod is fixedly connected to an auxiliary sleeve. One side of the auxiliary sleeve is connected to a hose connected to a feed pump, and a guide tube is fixedly connected to the auxiliary sleeve. Multiple spray tubes are connected to the side of the guide tube near the processing tube. The inner ring of the auxiliary sleeve is also fixedly connected to a coil for heating the processing tube.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By applying multiple flexible protections to the outside of the steel pipe, the risk of breakage can be reduced. At the same time, the multiple flexible protections can reduce damage caused by impact and scratches, thereby protecting the internal polytetrafluoroethylene and steel pipe, thus extending the overall service life.

[0015] 2. Through the cooperation of multiple devices, multiple coatings can be sprayed at once, reducing the number of steps in the overall processing. During the spraying process, the underlying steel pipe can be heated, allowing the various coatings to evaporate quickly and ensuring the rapid progress of the coating spraying process. Attached Figure Description

[0016] Figure 1 This is a diagram of the steel pipe layer structure; Figure 2 This is a front view of the production unit. Figure 3 This is a side view of the production unit. Figure 4 This is a schematic diagram of the main view of the production unit; Figure 5 Front view structural diagram of the clamping motion mechanism; Figure 6 This is a partial front view of the clamping motion mechanism. Figure 7 To support the front view structure diagram of the component; Figure 8 This is a schematic diagram of the main view of the supporting components; Figure 9 This is a front view structural diagram of the external spraying mechanism; Figure 10 This is a front view of the internal spraying mechanism.

[0017] Explanation of key symbols: 01. Steel cylinder; 02. Waterproof layer; 03. Flexible layer one; 04. Flexible layer two; 05. Fiber layer; 06. Rigid layer; 11. Support box; 12. Guide channel; 13. Filter box; 14. Raw material box; 15. Replenishment pipe; 16. Motor one; 17. Flexible pipe one; 18. Rigid pipe; 19. Guide frame; 20. Counterweight cylinder; 21. Protective cover; 22. Electric slide rail; 23. Telescopic rod one; 24. Conductor pipe; 25. Matching ring; 26. Processing pipe; 27. Auxiliary sleeve; 28. Flexible hose two; 29. 30. Rotating tube; 31. Fixed cylinder; 32. Support sleeve; 33. Telescopic rod three; 34. Support plate; 35. Motor two; 36. Drive wheel; 37. Support frame; 38. Telescopic rod four; 39. Motor four; 40. Rotating ring; 41. Gear ring; 42. Injection pipe one; 43. Contact ring; 44. Motor three; 45. Gear one; 46. Stabilizing ring; 47. Gear two; 48. Stabilizing column; 49. Gear three; 50. Hydraulic cylinder; 51. Horizontal tube; 52. Injection pipe two; 53. Gear four; 54. Telescopic rod five. Detailed Implementation

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0019] Example 1: Please refer to Figure 1 , The corrosion-resistant steel pipe includes: a steel cylinder 01 for support, with a water-proof layer 02, a flexible layer 03, a flexible layer 04, a fiber layer 05, and a rigid layer 06 sequentially connected to both sides of the steel cylinder 01. The water-proof layer 02, flexible layer 03, flexible layer 04, fiber layer 05, and rigid layer 06 are used to protect the steel cylinder 01. The steel cylinder 01 is made of manganese steel or carbon steel. The water-proof layer 02 is made of polytetrafluoroethylene (PTFE) to achieve the main insulation and protect the internal steel pipe. The flexible layer 03 uses a polyurethane flexible coating, the flexible layer 04 uses a fluororubber modified coating, the fiber layer 05 uses carbon fiber, and the rigid layer 06 uses a nano-ceramic composite material.

[0020] Example 2: Combination Figure 1-3 This embodiment is manufactured based on Embodiment 1; The manufacturing apparatus includes a support box 11 fixed to the ground. A clamping motion mechanism is fixedly connected to the support box 11. An external spraying mechanism is provided on the clamping motion mechanism. An internal spraying mechanism is provided on one side of the clamping motion mechanism and located on the support box 11. The clamping motion mechanism can clamp the corresponding processing pipe 26 and drive the corresponding processing pipe 26 to rotate. While the processing pipe 26 rotates, the internal spraying mechanism and the external spraying mechanism can perform synchronous moving spraying to achieve efficient steel pipe production.

[0021] The clamping motion mechanism includes a stabilizing component mounted on the support box 11. The processing tube 26 is clamped between the stabilizing components. The stabilizing components are used to clamp and rotate the processing tube 26. A processing component for gas treatment is connected to one side of the stabilizing component. A support component for supporting the processing tube 26 is also provided at the bottom of the processing tube 26. The processing component can absorb the atomized gas generated during the operation of the two spraying mechanisms to prevent it from overflowing, thereby ensuring the stability of the surrounding environment during operation. The support component can support the processing tube 26 to ensure the stability of the processing tube 26 during rotation. The processing tube 26 is an ordinary steel pipe, which will be used for subsequent spraying processing.

[0022] Example 2: Combination Figure 1-8 This embodiment, based on embodiment 2, further improves upon the following: the stabilizing component includes two support sleeves 31 fixedly connected to the support box 11. A fixed cylinder 30 is fixedly connected to each support sleeve 31. The support sleeves 31 support the fixed cylinder 30 to maintain its stability. Multiple stabilizing columns 48 are fixedly connected to the inner wall of the fixed cylinder 30, and a stabilizing ring 46 is fixedly connected to the other end of each stabilizing column 48. A rotating ring 40 is rotatably sleeved on the inner wall of the stabilizing ring 46. The stabilizing columns 48 can fix the drive wheel 36 to the fixed cylinder 30, thereby ensuring the stability of the rotating ring 40's position and preventing it from shifting during subsequent rotation. The outer wall of the rotating ring 40 is fixed... A gear 47 is fixedly sleeved on the outside of the fixed cylinder 30. A driver is also connected to the outside of the fixed cylinder 30 to drive the gear 47 to rotate. The driver can drive the gear 47 to rotate, thereby driving the rotating ring 40 and the adjuster to rotate, which in turn drives the processing tube 26 to rotate. A clamp is also connected to one side of the rotating ring 40. A rotating tube 29 connected to the external spraying mechanism is rotatably sleeved on the outside of the fixed cylinder 30. An adjuster fixedly connected to the corresponding support sleeve 31 is connected to the outside of one of the rotating tubes 29. The rotating tube 29 can drive the external spraying mechanism to rotate at a certain angle to adapt to the feeding of the processing tube 26 and the adjustment of its spraying range. The clamp performs to clamp the corresponding processing tube 26 to be processed.

[0023] The driver includes a motor 44 fixedly connected to the fixed cylinder 30. The output end of the motor 44 is driven by a gear 45. One side of the gear 45 is driven by a gear 49 that meshes with a gear 47. One end of the gear 49 is rotatably connected to a protective cover 21 fixedly connected to the support sleeve 31. The motor 44 generates driving force, which is then transmitted through the gears 45 and 49 to drive the gear 47 to rotate, thereby causing the corresponding rotating ring 40 to rotate, and synchronously driving the clamp and the processing tube 26 to rotate.

[0024] The clamp includes a hydraulic cylinder 50 fixedly connected to the rotating ring 40. A mating ring 25 is fixedly connected to the moving end of the hydraulic cylinder 50. A contact ring 43 that contacts one end of the processing tube 26 is engaged on one side of the mating ring 25. Multiple coarse cones are integrally formed on the side of the contact ring 43 away from the mating ring 25. The moving ends of the multiple hydraulic cylinders 50 can extend synchronously, thereby driving the mating ring 25 and the toothed ring 41 at their ends to move. The toothed rings 41 on both sides move relative to each other, thereby clamping the processing tube 26 to be processed.

[0025] The regulator includes a second motor 34 fixedly connected to the support sleeve 31. The output end of the second motor 34 is connected to a fifth gear. The outer side of the fifth gear is meshed with a gear ring 41 fixedly connected to the rotating tube 29. Driven by the second motor 34, the corresponding fifth gear is rotated, thereby driving the gear ring 41 to rotate at a certain angle. This causes the rotating tube 29 to rotate at a certain angle around the axis of the processing tube 26 to make room for loading and unloading. At the same time, the rotating tube 29 can periodically oscillate relative to the axis of the processing tube 26 to change the spraying angle.

[0026] The support assembly includes a guide groove 12 that engages with the support box 11. A guide rail is provided inside the guide groove 12, and a slider is slidably disposed within the guide rail. The slider can slide within the guide rail. Multiple telescopic rods 32 are fixedly connected to one side of the slider. A support plate 33 is connected to the moving end of the telescopic rods 32. Multiple telescopic rods 38 are rotatably connected within the support plate 33. A support frame 37 is fixedly connected to the moving end of the telescopic rods 38. A motor 39 is fixedly connected to one side of the support frame 37. The output end of the motor 39 is driven by a drive mechanism rotatably connected to the support frame 37. Before the operation, the relative position of the telescopic rod 32 in the support box 11 can be adjusted to better support the processing tube 26. At the same time, as needed, the telescopic rod 38 can be rotated to change the position of the drive wheel 36 relative to the processing tube 26. The motor 39 is started, and its output end drives the drive wheel 36 to rotate, thereby assisting the processing tube 26 to rotate axially. At the same time, the drive wheel 36 provides bottom support for the processing tube 26 to avoid excessive torque on the processing tube 26 during clamping, which would cause slight deformation and reduce the overall working accuracy.

[0027] Example 3: Combination Figure 1-10 This embodiment is an improvement on embodiment 1, further described in the following aspects: The processing assembly includes a vent pipe connected to one of the fixed cylinders 30. The other end of the vent pipe extends and connects to a filter box 13 fixedly connected to a support box 11. A motor 34 is connected to one side of the filter box 13. The filter box 13 contains a filtrate and filter cotton for gas treatment and filtration. A drain pipe and a replenishment pipe 15 are also connected to one side of the filter box 13. The motor 34 draws in the gas, creating a negative pressure around the rotating ring 40. The gas enters the fixed cylinder 30 through the inside and outside of the processing pipe 26, and then enters the filter box 13 through the vent pipe for filtration. The filtrate in the filter box 13 is an existing organic solvent, which absorbs and adsorbs the organic coating. At the same time, the filter cotton reduces the passage of large organic molecules. Finally, the clean gas is discharged through the output end of the motor 34. The drain pipe and replenishment pipe 15 can replenish the liquid in the filter box 13 or discharge wastewater, ensuring the continuous operation of the gas treatment.

[0028] Example 4: Combination Figure 1-10 This embodiment, based on Embodiment 1, further improves upon the following: the internal spraying mechanism includes a raw material box 14 fixedly connected to the support box 11. Multiple telescopic rods 54 are fixedly connected to the raw material box 14. A horizontally arranged guide frame 19 is fixedly connected to the moving end of each telescopic rod 54. A motor 16 is fixedly connected to one side of the guide frame 19. A gear 4 53 is driven to the output end of the motor 16. A spraying assembly is meshed with the gear 4 53. Driven by the motor 16, the gear 4 53 rotates, thereby pushing the multiple spraying assemblies to move, allowing them to enter the processing pipe 26 and spray the inner wall of the processing pipe 26, ensuring the processing of the pipe's interior and obtaining a corrosion-resistant inner wall.

[0029] The spray assembly includes multiple rigid tubes 18 connected end-to-end. A rack, meshing with a gear 53, is located at the bottom of each rigid tube 18. A counterweight cylinder 20 is sleeved at one end of one rigid tube 18, and a transverse tube 51 is connected to one end of the counterweight cylinder 20. Multiple spray nozzles 52 are connected to the transverse tube 51. A flexible tube 17 is connected to one end of another rigid tube 18 away from the one connected to the counterweight cylinder 20. The other end of the flexible tube 17 is connected to a feed pump located in the raw material tank 14. The rigid tubes 18 are connected in sequence to transport liquid raw materials, allowing the raw materials to pass through... After passing through the flexible tube 17 and the rigid tube 18, the liquid passes through the counterweight cylinder 20 and the transverse tube 51, and finally is sprayed out through different spray tubes 52 for different levels of liquid spraying. Multiple feed pumps are provided, and the output end of each feed pump is connected to a corresponding spray tube. The raw material tank 14 is provided with multiple non-interconnected spaces for placing different coatings and feed pumps. Multiple spray tubes are bundled together and then placed in the rigid tube or the flexible tube 17 for synchronous delivery of coatings. The corresponding spray tube is connected to the corresponding spray tube for spraying the corresponding coating.

[0030] The external spraying mechanism includes an electric slide rail 22 fixedly connected to the rotating tube 29. A telescopic rod 23 is fixedly connected to the moving end of the electric slide rail 22, and an auxiliary sleeve 27 is fixedly connected to the other end of the telescopic rod 23. A hose 28 connected to the feed pump is connected to one side of the auxiliary sleeve 27, and a guide tube 24 is fixedly connected to the auxiliary sleeve 27. Multiple spray tubes 42 are connected to the side of the guide tube 24 near the processing tube 26. A coil for heating the processing tube 26 is also fixedly connected to the inner ring of the auxiliary sleeve 27. Through the supply of the feed pump, the liquid passes through the hose 28, the auxiliary sleeve 27, and the guide tube 24, and is sprayed through the spray tubes 42 and overflows, thereby realizing the external spraying treatment of the processing tube 26 to ensure the stability of the external protective coating when the processing tube 26 is used in the future.

[0031] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A corrosion-resistant steel pipe, characterized in that, include: The steel cylinder (01) is used for support. Both sides of the steel cylinder (01) are connected in sequence with a water-proof layer (02), a flexible layer one (03), a flexible layer two (04), a fiber layer (05), and a rigid layer (06). The water-proof layer (02), flexible layer one (03), flexible layer two (04), fiber layer (05), and rigid layer (06) are used to protect the steel cylinder (01).

2. A production apparatus for manufacturing the corrosion-resistant steel pipe as described in claim 1, characterized in that, Includes a support box (11) fixed to the ground, a clamping motion mechanism is fixedly connected to the support box (11), an external spraying mechanism is provided on the clamping motion mechanism, and an internal spraying mechanism is provided on one side of the clamping motion mechanism located on the support box (11); The clamping motion mechanism includes a stabilizing component disposed on the support box (11), and a processing tube (26) is clamped between the stabilizing components. The stabilizing components are used for clamping and rotating the processing tube (26). A processing component for gas processing is connected to one side of the stabilizing component. A support component for supporting the processing tube (26) is also disposed at the bottom of the processing tube (26).

3. The production apparatus for corrosion-resistant steel pipes as described in claim 2, characterized in that, The stabilizing assembly includes two support sleeves (31) fixedly connected to the support box (11). A fixed cylinder (30) is fixedly connected to the support sleeve (31). A plurality of stabilizing columns (48) are fixedly connected to the inner side wall of the fixed cylinder (30), and a stabilizing ring (46) is fixedly connected to the other end of the stabilizing column (48). A rotating ring (40) is rotatably sleeved on the inner side wall of the stabilizing ring (46). A gear two (47) is fixedly sleeved on the outer side of the rotating ring (40). A driver for driving the gear two (47) to rotate is also connected to the outer side of the fixed cylinder (30). A clamp is also connected to one side of the rotating ring (40). A rotating tube (29) connected to the external spraying mechanism is rotatably sleeved on the outer side of the fixed cylinder (30). An adjuster fixedly connected to the corresponding support sleeve (31) is connected to the outer side of one of the rotating tubes (29).

4. The production apparatus for corrosion-resistant steel pipes as described in claim 3, characterized in that, The driver includes a motor three (44) fixedly connected to the fixed cylinder (30), the output end of the motor three (44) is drivenly connected to a gear one (45), one side of the gear one (45) is drivenly connected to a gear three (49) meshing with a gear two (47), and one end of the gear three (49) is rotatably connected to a protective cover (21) fixedly connected to the support sleeve (31).

5. The production apparatus for corrosion-resistant steel pipes as described in claim 3, characterized in that, The clamp includes a hydraulic cylinder (50) fixedly connected to the rotating ring (40). A mating ring (25) is fixedly connected to the moving end of the hydraulic cylinder (50). A contact ring (43) that contacts one end of the processing tube (26) is snapped onto one side of the mating ring (25). Multiple coarse cones are integrally formed on the side of the contact ring (43) away from the mating ring (25).

6. The production apparatus for corrosion-resistant steel pipes as described in claim 3, characterized in that, The regulator includes a second motor (34) fixedly connected to the support sleeve (31). The output end of the second motor (34) is connected to a fifth gear. The outer side of the fifth gear is meshed with a gear ring (41) fixedly connected to the rotating tube (29).

7. The production apparatus for corrosion-resistant steel pipes as described in claim 3, characterized in that, The support assembly includes a guide groove (12) that engages with the support box (11). A guide rail is provided in the guide groove (12), and a slider is slidably provided in the guide rail. The slider can slide in the guide rail. Multiple telescopic rods (32) are fixedly connected to one side of the slider. A support plate (33) is connected to the moving end of the telescopic rods (32). Multiple telescopic rods (38) are rotatably connected in the support plate (33). A support frame (37) is fixedly connected to the moving end of the telescopic rods (38). A motor (39) is fixedly connected to one side of the support frame (37). A drive wheel (36) that is rotatably connected to the output end of the motor (39) is driven by the motor (39).

8. The production apparatus for corrosion-resistant steel pipes as described in claim 3, characterized in that, The processing assembly includes a vent pipe connected to one of the fixed cylinders (30), the other end of which extends and connects to a filter box (13) fixedly connected to a support box (11). A motor (34) is connected to one side of the filter box (13). The filter box (13) contains a filter liquid and filter cotton for gas processing and filtration. A drain pipe and a replenishment pipe (15) are also connected to one side of the filter box (13).

9. The production apparatus for corrosion-resistant steel pipes as described in claim 8, characterized in that, The internal spraying mechanism includes a raw material box (14) fixedly connected to the support box (11). Multiple telescopic rods (54) are fixedly connected to the raw material box (14). A horizontally arranged guide frame (19) is fixedly connected to the moving end of the telescopic rod (54). A motor (16) is fixedly connected to one side of the guide frame (19). A gear (53) is driven to the output end of the motor (16). A spraying assembly is meshed with the gear (53). The spray assembly includes multiple rigid tubes (18) connected end to end. The bottom of the rigid tube (18) is provided with a rack that meshes with gear four (53). One end of the rigid tube (18) is fitted with a counterweight cylinder (20). One end of the counterweight cylinder (20) is connected to a transverse tube (51). Multiple spray pipes two (52) are connected to the transverse tube (51). One end of another rigid tube (18) away from the rigid tube (18) connected to the counterweight cylinder (20) is connected to a flexible tube one (17). The other end of the flexible tube one (17) is connected to a feed pump located in the raw material box (14).

10. The production apparatus for corrosion-resistant steel pipes as described in claim 9, characterized in that, The external spraying mechanism includes an electric slide rail (22) fixedly connected to the rotating tube (29). The moving end of the electric slide rail (22) is fixedly connected to a telescopic rod (23), and the other end of the telescopic rod (23) is fixedly connected to an auxiliary sleeve (27). One side of the auxiliary sleeve (27) is connected to a hose (28) connected to a feed pump, and a guide tube (24) is fixedly connected to the auxiliary sleeve (27). The side of the guide tube (24) near the processing tube (26) is connected to multiple spray tubes (42). The inner ring of the auxiliary sleeve (27) is also fixedly connected to a coil for heating the processing tube (26).

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