Intelligent salt spray corrosion test equipment for galvanized steel pipe

Abstract

The invention relates to the technical field of corrosion resistance, and discloses galvanized steel pipe intelligent salt spray corrosion test equipment which comprises a detection box. A unique overturning and composite rotating structure is arranged, when the steel pipe is driven by the connecting frame to overturn and rotate in an inclined state, the internal space structure of the steel pipe is changed, the area which is originally deposited at the bottom or is difficult to touch due to gravity is fully exposed, and the contact area of salt mist and the inner wall of the steel pipe is greatly increased; in the rotating process, a main bevel gear at the bottom of the surrounding rod is meshed with an auxiliary bevel gear on the side wall of the detection box to realize composite rotation of the steel pipe and the surrounding rod, so that the steel pipe not only does circular motion around the central axis of the detection box, but also rotates along the axis direction, and the two motions are superposed to form a complex comprehensive motion track to change the relative position of the steel pipe and salt mist in all directions; each surface of the steel pipe is in contact with salt mist at different angles for multiple times, meanwhile, the stirring effect on the salt mist in the detection box is enhanced, the salt mist is distributed more uniformly, and the accuracy of a detection result is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of corrosion resistance, and in particular relates to intelligent salt spray corrosion testing equipment for galvanized steel pipes. Background Art

[0002] In the corrosion resistance testing of metal materials, salt spray corrosion test is a commonly used and important test method, especially for galvanized steel pipes. The salt spray corrosion test can effectively evaluate the protective performance of the surface galvanized layer and the overall corrosion resistance of the steel pipe.

[0003] Currently, existing salt spray corrosion testing equipment for galvanized steel pipes mostly uses vertical or horizontal placement. When placed vertically, gravity causes uneven distribution of salt spray within the pipe, resulting in excessively high concentrations at the bottom and insufficient concentrations at the top. This creates dead zones for salt spray, making it difficult to simulate a realistic corrosion environment and impacting test accuracy and reliability. When placed horizontally, the upper and lower surfaces of the pipe experience varying degrees of salt spray exposure, leading to uneven corrosion. Furthermore, the salt spray flow within the pipe is weak and the concentration is inconsistent, resulting in test results that cannot accurately reflect the corrosion resistance of the pipe in all directions, making it impossible to provide a reliable basis for quality assessment and performance optimization.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: The invention discloses intelligent salt spray corrosion testing equipment for galvanized steel pipes, comprising a testing box.

[0006] The detection box is provided with a cover plate, the cover plate is provided with a through hole, and a steel pipe is inserted into the through hole; A pair of positioning frames are rotatably mounted on the bottom of the detection box, a slider is slidably mounted on each positioning frame, a connecting frame is rotatably mounted on the side wall of the slider, a pressing plate is mounted on the end of the connecting frame, a plurality of pairs of surrounding rods are movably plugged on the pressing plate, and the side walls of the surrounding rods are rotatably connected to the side walls of the positioning frame, the pressing plate is in contact with the steel pipe, and the steel pipe is driven to move into the detection box during the downward movement of the slider; The side wall of the positioning frame is provided with a tilted turning groove, which is slidably connected to the connecting frame. The turning groove is used to drive the steel pipe to a tilted state and also to drive the sealing plate installed on the top of the fence to seal the through hole. A main bevel gear is installed at the bottom of the fence, and the main bevel gear after the fence and the steel pipe are turned over synchronously is adapted to the auxiliary bevel gear installed on the side wall of the detection box.

[0007] As a preferred embodiment of the present invention, four supporting legs are installed at the bottom of the detection box, and the four supporting legs are in the shape of a boss. Reinforcing ribs are installed between each adjacent supporting legs, and the heights of the reinforcing ribs are different. An inspection door is installed on the side wall of the detection box by bolts, and the inspection door is used to inspect the internal components of the detection box. An operating door is rotatably installed on the detection box, and a handle is installed on the operating door, and an anti-slip groove is provided on the surface of the handle.

[0008] As a preferred embodiment of the present invention, a mounting ear is provided at the bottom of the cover plate, the mounting ear is in contact with the top of the detection box, the mounting ear and the detection box are screwed together by bolts, three atomizing nozzles are installed on the cover plate, the spraying end of the atomizing nozzle is placed inside the detection box, and a salt mist delivery pipe is installed at the input end of the atomizing nozzle, and the salt mist delivery pipe is interconnected with an external salt mist generator.

[0009] As a preferred embodiment of the present invention, a synchronization plate is installed on the side wall of the enclosure rod, a synchronization shaft is installed on the side wall of the synchronization plate, the synchronization shaft is rotatably connected to the side wall of the positioning frame, the sealing plate is arc-shaped, the shape of the sealing plate and the end face of the through hole are adapted to each other, and the center of curvature of the sealing plate is on the same straight line as the synchronization shaft.

[0010] As a preferred embodiment of the present invention, a driving motor is installed at the bottom of the detection box, a disc is installed at the output end of the driving motor, the top of the disc is interconnected with the bottom of a pair of positioning frames, the driving motor is used to drive the positioning frames and the steel pipes to rotate synchronously, and a partition is rotatably installed on the side wall of the disc, and the side wall of the partition is welded to the inner wall of the detection box.

[0011] As a preferred embodiment of the present invention, a base plate is installed at the bottom of the guardrail, and the bottom of the base plate is interconnected with the main bevel gear. A return spring is sleeved on the guardrail located between the base plate and the pressure plate. One end of the return spring is clamped on the pressure plate, and the other end of the return spring is clamped on the base plate. A limiting plate is installed on the guardrail, and the limiting plate is used to limit the maximum distance of movement of the pressure plate.

[0012] As a preferred embodiment of the present invention, a boss is installed on the pressure plate, and the boss is cross-shaped. The boss is used to discharge the salt spray solution inside the steel pipe from the bottom. A positioning plate is installed on the side wall of the boss, and a locking bolt is screwed on the positioning plate. The end of the locking bolt fits tightly with the end of the steel pipe, and the locking bolt is used to locate the position of the steel pipe.

[0013] As a preferred embodiment of the present invention, a positioning shaft is installed at the end of the connecting frame, and the end of the positioning shaft is rotatably connected to the slider. An electric push rod is installed on the top of the slider, and the electric push rod is used to drive the slider to move downward. The electric push rod housing is installed on the side wall of the positioning frame, and a limit rod is installed through both ends of the slider. A limit seat is installed at both ends of the limit rod, and the limit seat is welded to the side wall of the positioning frame. A limit spring is sleeved on the limit rod, and one end of the limit spring is clamped on the limit seat, and the other end of the limit spring is clamped on the slider.

[0014] As a preferred embodiment of the present invention, a combination groove is provided on the side wall of the positioning frame, and the combination groove is composed of a downward groove and a flip groove, and the downward groove is a vertical groove, and the lowest point of the downward groove is connected to the highest point of the flip groove. A sliding rod is slidingly provided on the combination groove, and the sliding rod is connected to the connecting frame. The connecting frame first slides vertically along the downward groove, and rotates its angle after sliding to the flip groove.

[0015] As a preferred embodiment of the present invention, a mounting bracket is installed on the side wall of the secondary bevel gear, and the mounting bracket is welded to the side wall of the detection box.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention is provided with a unique flipping and compound rotation structure. When the steel pipe flips and rotates in an inclined state under the drive of the connecting frame, its internal space structure changes, and the areas originally deposited at the bottom or difficult to reach due to gravity are fully exposed, which greatly increases the contact area between the salt mist and the inner wall of the steel pipe; and during the rotation process, the main bevel gear at the bottom of the enclosure engages with the secondary bevel gear on the side wall of the detection box to realize the compound rotation of the steel pipe and the enclosure, so that the steel pipe not only makes a circular motion around the central axis of the detection box, but also rotates along the axis. The superposition of the two motions forms a complex and comprehensive motion trajectory, which changes the relative position of the steel pipe and the salt mist in all directions, allows each surface of the steel pipe to contact the salt mist at multiple times and different angles, and at the same time enhances the stirring effect of the salt mist in the detection box, like double stirring, prompting the salt mist to form a more intense dynamic flow, completely breaking the local concentration difference, making the salt mist more evenly distributed, ensuring that the concentration of salt mist contacted by various parts of the steel pipe is basically consistent, and improving the accuracy of the detection results.

[0017] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the attached figure: Figure 1 A three-dimensional diagram of an intelligent salt spray corrosion test equipment for galvanized steel pipes; Figure 2 This is a front view of an intelligent salt spray corrosion test equipment for galvanized steel pipes; Figure 3The interior of an intelligent salt spray corrosion test equipment for galvanized steel pipes Figure 1 ; Figure 4 The interior of an intelligent salt spray corrosion test equipment for galvanized steel pipes Figure 2 ; Figure 5 An intelligent salt spray corrosion test equipment for galvanized steel pipes Figure 4 Bottom view; Figure 6 A part of an intelligent salt spray corrosion test equipment for galvanized steel pipes Figure 1 ; Figure 7 A part of an intelligent salt spray corrosion test equipment for galvanized steel pipes Figure 2 ; Figure 8 An intelligent salt spray corrosion test equipment for galvanized steel pipes Figure 7 Enlarged view of point A in the middle; Figure 9 A part of an intelligent salt spray corrosion test equipment for galvanized steel pipes Figure 3 .

[0019] In the picture: 1. Inspection box; 11. Support legs; 111. Reinforcement ribs; 12. Inspection door; 13. Operation door; 131. Handle; 14. Cover; 141. Mounting ears; 142. Through hole; 15. Atomizing nozzle; 151. Salt spray delivery pipe; 2. Enclosure; 21. Bottom plate; 211. Sealing plate; 212. Synchronizing plate; 213. Synchronizing shaft; 22. Pressing plate; 221. Return spring; 222. Limiting plate; 23. Boss; 231. Positioning plate; 232. Locking bolt; 24. Connecting frame; 241. Positioning shaft; 242. Sliding block; 25. Electric push rod; 26. Positioning frame; 261. Disc; 262. Driving motor; 263. Partition; 27. Limiting rod; 271. Limiting seat; 272. Limiting spring; 28. Combination slot; 281. Lowering slot; 282. Flipping slot; 283. Sliding bar; 3. Main bevel gear; 31. Auxiliary bevel gear; 311. Mounting frame; 4. Steel pipe. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0021] Example 1: like Figures 1 to 9 As shown, an intelligent salt spray corrosion test equipment for galvanized steel pipes includes a detection box 1.

[0022] A cover plate 14 is installed on the detection box 1. A through hole 142 is opened on the cover plate 14, and a steel pipe 4 is inserted into the through hole 142. A pair of positioning frames 26 are rotatably mounted on the bottom of the detection box 1, and a slider 242 is slidably mounted on each positioning frame 26. A connecting frame 24 is rotatably mounted on the side wall of the slider 242, and a pressing plate 22 is mounted on the end of the connecting frame 24. A plurality of pairs of surrounding rods 2 are movably plugged on the pressing plate 22, and the side walls of the surrounding rods 2 are rotatably connected to the side walls of the positioning frames 26. The pressing plate 22 fits the steel pipe 4, and the steel pipe 4 is driven to move into the detection box during the downward movement of the slider 242; The side wall of the positioning frame 26 is provided with a tilted turning groove 282, which is slidably connected to the connecting frame 24. The turning groove 282 is used to drive the steel pipe 4 to a tilted state and also to drive the sealing plate 211 installed on the top of the fence 2 to seal the through hole 142. A primary bevel gear 3 is mounted at the bottom of the enclosure 2. Following the synchronous flipping of the enclosure 2 and the steel pipe 4, the primary bevel gear 3 mates with a secondary bevel gear 31 mounted on the side wall of the test chamber 1. The linkage of the slider 242, the connecting frame 24, the pressure plate 22, and other components allows the steel pipe 4 to automatically enter the test chamber 1, reducing manual operation and improving test efficiency. The flip groove 282 drives the steel pipe 4 to tilt, and the sealing plate 211 seals the through-hole 142, ensuring full contact between the salt spray and the steel pipe 4 while preventing leakage and maintaining a stable test environment. The coordination of the primary and secondary bevel gears also lays the foundation for the subsequent compound movement of the steel pipe 4.

[0023] like Figures 1 to 9 As shown, in a specific embodiment, four supporting legs 11 are installed at the bottom of the test box 1. The four supporting legs 11 are in the shape of bosses. Reinforcing ribs 111 are installed between each adjacent supporting leg 11. The heights of the reinforcing ribs 111 are different. An inspection door 12 is installed on the side wall of the test box 1 via bolts. The inspection door 12 is used to inspect the components inside the test box 1. An operating door 13 is rotatably installed on the test box 1. The operating door 13 is installed on the handle 131. The surface of the handle 131 is provided with an anti-slip groove. The boss-shaped supporting legs 11 and the reinforcing ribs 111 of different heights enhance the stability of the test box 1, preventing it from shaking due to the movement of internal components during the test process. The inspection door 12 facilitates maintenance of the internal equipment and extends the service life of the equipment. The handle 131 of the operating door 13 is provided with an anti-slip groove to facilitate the operator to open and close the door, improving operational safety.

[0024] like Figures 1 to 9As shown, further, a mounting ear 141 is provided at the bottom of the cover 14. The mounting ear 141 is in contact with the top of the test box 1 and is screwed together with the test box 1. Three atomizing nozzles 15 are installed on the cover 14. The spraying end of the atomizing nozzle 15 is placed inside the test box 1. The input end of the atomizing nozzle 15 is installed with a salt mist delivery pipe 151, which is connected to an external salt mist generator. The mounting ear 141 is bolted to the test box 1, facilitating the removal and installation of the cover 14 and the placement and removal of the steel pipe 4. The three atomizing nozzles 15 can evenly spray the salt mist inside the test box 1, ensuring that the salt mist conditions exposed to each part of the steel pipe 4 are consistent, thereby improving the accuracy of the test.

[0025] Example 2: The difference between the above embodiment and this embodiment is that: Figures 1 to 9 As shown, a synchronizing plate 212 is mounted on the side wall of the enclosure 2, and a synchronizing shaft 213 is mounted on the side wall of the synchronizing plate 212. The synchronizing shaft 213 is rotatably connected to the side wall of the positioning frame 26. The sealing plate 211 is arc-shaped, and the shapes of the sealing plate 211 and the end surface of the through hole 142 are mutually adapted. The center of curvature of the sealing plate 211 and the synchronizing shaft 213 are aligned. The arrangement of the synchronizing plate 212 and the synchronizing shaft 213 ensures that the enclosure 2 is stable and does not deviate during the flipping process, thereby ensuring that the sealing plate 211 can accurately seal the through hole 142 and prevent salt spray leakage. The arc-shaped design of the sealing plate 211 that adapts to the through hole 142 can fit tightly to the through hole 142, improving the sealing effect.

[0026] like Figures 1 to 9 As shown, in a specific embodiment, a drive motor 262 is mounted at the bottom of the test chamber 1. A disk 261 is mounted at the output end of the drive motor 262. The top of the disk 261 is interconnected with the bottom of a pair of positioning brackets 26. The drive motor 262 is used to drive the positioning brackets 26 and the steel pipe 4 to rotate synchronously. A partition 263 is rotatably mounted on the sidewall of the disk 261. The sidewalls of the partition 263 are welded to the inner wall of the test chamber 1. The drive motor 262 drives the positioning bracket 26 and the steel pipe 4 to rotate via the disk 261, allowing the steel pipe 4 to be exposed to salt spray at multiple angles in a salt spray environment, improving the test results. The partition 263 supports and stabilizes the disk 261, ensuring smooth rotation. The return spring 221 provides a buffer and reset function during the movement of the steel pipe 4, protecting equipment components. The limit plate 222 limits the range of movement of the pressure plate 22, preventing excessive movement and damage to the equipment, ensuring safe operation.

[0027] Example 3: like Figures 1 to 9As shown, further, a base plate 21 is installed at the bottom of the guardrail 2, and the bottom of the base plate 21 is interconnected with the main bevel gear 3. A return spring 221 is sleeved on the guardrail 2 located between the base plate 21 and the pressure plate 22. One end of the return spring 221 is clamped on the pressure plate 22, and the other end of the return spring 221 is clamped on the base plate 21. A limiting plate 222 is installed on the guardrail 2, and the limiting plate 222 is used to limit the maximum movement distance of the pressure plate 22.

[0028] Example 3: The difference between the above embodiment and this embodiment is that: Figures 1 to 9 As shown, a cross-shaped boss 23 is mounted on the pressure plate 22. The boss 23 is used to allow the salt spray solution inside the steel pipe 4 to drain from the bottom. A positioning plate 231 is mounted on the sidewall of the boss 23. A locking bolt 232 is screwed onto the positioning plate 231. The end of the locking bolt 232 fits tightly against the end of the steel pipe 4 and is used to position the steel pipe 4. The cross-shaped boss 23 effectively guides the discharge of the salt spray solution inside the steel pipe 4, preventing solution accumulation from affecting contact between the salt spray and the inner wall of the steel pipe 4, thereby ensuring the test results. The locking bolt 232 firmly secures the steel pipe 4, preventing it from shaking during the test and ensuring accurate test data.

[0029] like Figures 1 to 9 As shown, in a specific embodiment, a positioning shaft 241 is mounted at the end of the connecting frame 24. The end of the positioning shaft 241 is rotatably connected to a slider 242. An electric push rod 25 is mounted on the top of the slider 242, and the electric push rod 25 is used to drive the slider 242 downward. The housing of the electric push rod 25 is mounted on the side wall of the positioning frame 26. A limit rod 27 is installed at both ends of the slider 242. A limit seat 271 is installed at both ends of the limit rod 27. The limit seat 271 is welded to the side wall of the positioning frame 26. A limit spring 272 is sleeved on the limit rod 27. One end of the limit spring 272 is clamped on the limit seat 271, and the other end of the limit spring 272 is clamped on the slider 242. The electric push rod 25 drives the slider 242 downward, realizing that the steel pipe 4 automatically enters the detection box 1, improving operational convenience. The limit rod 27 and the limit spring 272 ensure that the slider 242 is stable during the downward movement, preventing it from deflecting or shaking, and protecting equipment components.

[0030] like Figures 1 to 9As shown, further, a combination groove 28 is formed on the side wall of the positioning frame 26. The combination groove 28 is composed of a downward groove 281 and a reversing groove 282. The downward groove 281 is a vertical groove, and the lowest point of the downward groove 281 is connected to the highest point of the reversing groove 282. A slide bar 283 is slidingly provided on the combination groove 28. The slide bar 283 is connected to the connecting frame 24. The connecting frame 24 first slides vertically along the downward groove 281 and rotates its angle after sliding to the reversing groove 282. The design of the combination groove 28 enables the connecting frame 24 to drive the steel pipe 4 to first move downward and then reversing, so that the steel pipe 4 automatically adjusts its posture so that it can fully contact the salt spray. The slide bar 283 slides within the combination groove 28 to ensure the accurate movement trajectory of the connecting frame 24 and stable operation of the equipment.

[0031] like Figures 1 to 9 As shown, a mounting bracket 311 is mounted on the side wall of the secondary bevel gear 31 and welded to the side wall of the test box 1. The surfaces of the structures inside the test box 1 are all coated with an anti-corrosion coating. The mounting bracket 311 secures the secondary bevel gear 31, ensuring stable meshing with the primary bevel gear 3. The internal structure of the test box 1 is coated with an anti-corrosion coating to prevent salt spray corrosion on equipment components and extend the service life of the equipment.

[0032] The implementation principle of the intelligent salt spray corrosion test equipment for galvanized steel pipes of the present invention is as follows: When conducting a salt spray corrosion test on a galvanized steel pipe, first place the steel pipe 4 on the pressure plate 22 through the through hole 142 on the cover plate 14, and tighten the locking bolt 232 on the positioning plate 231 to make its end fit tightly with the end of the steel pipe 4. This precise fixing method can ensure that the steel pipe 4 remains stable during the test and avoid affecting the contact effect between the salt spray and the steel pipe 4 due to shaking. The electric push rod 25 is activated, and it drives the slider 242 to move downward along the limit rod 27 on the positioning frame 26. During this process, the limit spring 272 on the limit rod 27 is compressed. The limit spring 272 not only acts as a buffer to prevent the rapid downward movement of the slider 242 from causing impact on equipment components, but also absorbs vibrations during the movement to a certain extent, ensuring the smooth downward movement of the steel pipe 4. The steel pipe 4 can penetrate into the interior of the detection box 1 from the surface of the through hole 142 in a stable posture, reducing the problem of uneven salt spray distribution caused by unstable movement, thereby facilitating detection. As slider 242 moves downward, its rotatably connected connecting frame 24 simultaneously slides downward, pushing platen 22 downward, thereby driving steel pipe 4 toward the interior of test chamber 1. This linkage ensures that steel pipe 4 maintains a positive posture upon entering test chamber 1, creating conditions for subsequent contact with salt spray. The steel pipe 4 smoothly penetrates the interior of test chamber 1, exposing a larger area to the salt spray environment and effectively increasing the chances of contact between the salt spray and steel pipe 4. When the slide bar 283 on the side wall of the positioning frame 26 slides to the lowest point of the downward groove 281, the steel pipe 4 is fully inserted into the inspection chamber 1. As the slide bar 283 enters the reversing groove 282, due to its tilted state, the slide bar 283 continues to move, driving the connecting frame 24 to rotate. The connecting frame 24 then causes the pressure plate 22, the steel pipe 4, and the surrounding bar 2 to revolve together. The synchronization plate 212 and synchronization shaft 213 on the side wall of the surrounding bar 2 ensure the stable reversal of the surrounding bar 2. Simultaneously, the sealing plate 211 at the top of the surrounding bar 2 gradually aligns with the through hole 142 and seals it. This reversing design, on the one hand, changes the posture of the steel pipe 4, breaking the conventional fixed placement method. This allows specific areas within the steel pipe 4, which may be difficult to contact with salt spray due to factors such as gravity, to be fully exposed to the salt spray. On the other hand, the sealing plate 211 seals the through hole 142, preventing salt spray leakage and ensuring a stable salt spray concentration within the inspection chamber 1. This provides a continuous and stable corrosion test environment for the steel pipe 4, allowing for more complete and uniform contact between the salt spray and the steel pipe 4.

[0033] At the same time, the main bevel gear 3 at the bottom of the fence 2 rotates synchronously with the fence 2 and the steel pipe 4, and when it rotates to a certain angle, it engages with the secondary bevel gear 31. The drive motor 262 is started, and the disc 261 at its output end drives the positioning frame 26 to rotate, thereby rotating the steel pipe 4, the fence 2 and other components together. Due to the engagement of the main bevel gear 3 and the secondary bevel gear 31, the fence 2 rotates around its own axis while the steel pipe 4 rotates. Under this composite motion mode, the steel pipe 4 rotates in an inclined state, and its motion process can effectively disturb the salt mist inside the test box 1. Compared with the traditional horizontal placement or simple horizontal rotation test method, the inclined rotating steel pipe 4 will drive the surrounding salt mist to flow during rotation, making the distribution of salt mist in the test box 1 more uniform, further improving the sufficiency and uniformity of the contact between the salt mist and various parts of the steel pipe 4, and greatly avoiding the situation where the local concentration of salt mist is too high or too low, so that the corrosion test results can more truly reflect the corrosion resistance of galvanized steel pipes in actual complex salt mist environments. During the rotation process, all parts of the steel pipe 4 can be in contact with the salt spray in all directions and at multiple angles, effectively avoiding the dead angles of the salt spray, ensuring that all parts inside the steel pipe 4 can be fully exposed to the salt spray, making the corrosion test closer to the actual working conditions, and the test results are more reliable and of reference value. The external salt mist generator delivers the salt mist to the atomizing nozzle 15 through the salt mist delivery pipe 151, and the atomizing nozzle 15 evenly sprays the salt mist into the interior of the test box 1. The layout design of multiple atomizing nozzles 15, combined with the spatial structure of the test box 1, can make the salt mist diffuse evenly in the box, forming a salt mist environment with uniform concentration, ensuring that the salt mist conditions exposed to various parts of the steel pipe 4 are consistent, and improving the accuracy and comparability of the test. During the test, if salt mist solution accumulates in the steel pipe 4, the cross-shaped boss 23 on the pressure plate 22 can guide the solution to be discharged from the bottom of the steel pipe 4, preventing the accumulation of solution from affecting the contact between the salt mist and the inner wall of the steel pipe 4, and ensuring that the salt mist can continuously and effectively perform corrosion tests on the steel pipe 4.

[0034] When the test is completed, the electric push rod 25 moves in the opposite direction, driving the slider 242 upward. The connecting frame 24 moves in the opposite direction along the flip groove 282 and the downward groove 281, returning the steel pipe 4 to its initial position. The cover 14 is then opened to remove the tested steel pipe 4. The components inside the test box 1 can then be inspected and maintained through the inspection door 12. The entire operation process is convenient and efficient, and all parts of the equipment work together. From the fixing, movement, flipping, and rotation of the steel pipe 4 to the spraying and control of the salt spray, the design of each link is closely centered on promoting full contact between the salt spray and the steel pipe 4, effectively improving the effectiveness and quality of the salt spray corrosion test.

Claims

1. An intelligent salt spray corrosion test equipment for galvanized steel pipes, comprising a test box (1), characterized in that: A cover plate (14) is installed on the detection box (1), a through hole (142) is opened on the cover plate (14), and a steel pipe (4) is inserted into the through hole (142); A pair of positioning frames (26) are rotatably mounted on the bottom of the detection box (1), a slider (242) is slidably mounted on each positioning frame (26), a connecting frame (24) is rotatably mounted on the side wall of the slider (242), a pressing plate (22) is mounted on the end of the connecting frame (24), a plurality of pairs of surrounding rods (2) are movably plugged on the pressing plate (22), and the side walls of the surrounding rods (2) are rotatably connected to the side walls of the positioning frames (26), the pressing plate (22) is fitted with the steel pipe (4), and the sliding block (242) drives the steel pipe (4) to move into the interior of the detection box during the downward movement; The side wall of the positioning frame (26) is provided with a tilted turning groove (282), and the turning groove (282) is slidably connected to the connecting frame (24). The turning groove (282) is used to drive the steel pipe (4) to change to a tilted state, and is also used to drive the sealing plate (211) installed on the top of the surrounding rod (2) to seal the through hole (142). A main bevel gear (3) is installed at the bottom of the enclosure rod (2). After the enclosure rod (2) and the steel pipe (4) are synchronously turned over, the main bevel gear (3) is adapted to the auxiliary bevel gear (31) installed on the side wall of the detection box (1).

2. The intelligent salt spray corrosion test equipment for galvanized steel pipes according to claim 1, characterized in that: Four supporting legs (11) are installed at the bottom of the detection box (1), and the four supporting legs (11) are in the shape of bosses. Reinforcement ribs (111) are installed between each adjacent supporting legs (11), and the heights of the reinforcement ribs (111) are different. An inspection door (12) is installed on the side wall of the detection box (1) by bolts, and the inspection door (12) is used to inspect the internal components of the detection box (1). An operating door (13) is rotatably installed on the detection box (1), and a handle (131) is installed on the operating door (13), and an anti-slip groove is provided on the surface of the handle (131).

3. The intelligent salt spray corrosion test equipment for galvanized steel pipes according to claim 1, characterized in that: The bottom of the cover plate (14) is provided with a mounting ear (141), the mounting ear (141) and the top of the detection box (1) are mutually fitted, and the mounting ear (141) and the detection box (1) are screwed together by bolts. Three atomizing nozzles (15) are installed on the cover plate (14), and the spraying ends of the atomizing nozzles (15) are placed inside the detection box (1). The input end of the atomizing nozzle (15) is provided with a salt mist delivery pipe (151), and the salt mist delivery pipe (151) is mutually connected to an external salt mist generator.

4. The intelligent salt spray corrosion test equipment for galvanized steel pipes according to claim 1, characterized in that: A synchronization plate (212) is installed on the side wall of the enclosure rod (2), and a synchronization shaft (213) is installed on the side wall of the synchronization plate (212). The synchronization shaft (213) is rotatably connected to the side wall of the positioning frame (26). The sealing plate (211) is arc-shaped, and the shapes of the sealing plate (211) and the end surface of the through hole (142) are adapted to each other, and the center of curvature of the sealing plate (211) and the synchronization shaft (213) are located on the same straight line.

5. The intelligent salt spray corrosion test equipment for galvanized steel pipes according to claim 1, characterized in that: A driving motor (262) is installed at the bottom of the detection box (1), and a disc (261) is installed at the output end of the driving motor (262). The top of the disc (261) is connected to the bottom of a pair of positioning frames (26). The driving motor (262) is used to drive the positioning frames (26) and the steel pipe (4) to rotate synchronously. A partition (263) is rotatably installed on the side wall of the disc (261), and the side wall of the partition (263) is welded to the inner wall of the detection box (1).

6. The intelligent salt spray corrosion test equipment for galvanized steel pipes according to claim 1, characterized in that: A bottom plate (21) is installed at the bottom of the enclosure rod (2), and the bottom of the bottom plate (21) is connected to the main bevel gear (3). A return spring (221) is sleeved on the enclosure rod (2) between the bottom plate (21) and the pressure plate (22). One end of the return spring (221) is clamped on the pressure plate (22), and the other end of the return spring (221) is clamped on the bottom plate (21). A limit plate (222) is installed on the enclosure rod (2), and the limit plate (222) is used to limit the maximum travel distance of the pressure plate (22).

7. The intelligent salt spray corrosion test equipment for galvanized steel pipes according to claim 1, characterized in that: A boss (23) is mounted on the pressure plate (22), and the boss (23) is cross-shaped. The boss (23) is used to discharge the salt spray solution inside the steel pipe (4) from the bottom. A positioning plate (231) is mounted on the side wall of the boss (23). A locking bolt (232) is screwed on the positioning plate (231). The end of the locking bolt (232) is tightly fitted with the end of the steel pipe (4), and the locking bolt (232) is used to position the steel pipe (4).

8. The intelligent salt spray corrosion test equipment for galvanized steel pipes according to claim 1, characterized in that: A positioning shaft (241) is installed at the end of the connecting frame (24), and the end of the positioning shaft (241) is rotatably connected to the slider (242). An electric push rod (25) is installed on the top of the slider (242), and the electric push rod (25) is used to drive the slider (242) to move downward. The housing of the electric push rod (25) is installed on the side wall of the positioning frame (26). The two ends of the slider (242) are penetrated by a limiting rod (27), and the two ends of the limiting rod (27) are installed with a limiting seat (271). The limiting seat (271) is welded to the side wall of the positioning frame (26). A limiting spring (272) is sleeved on the limiting rod (27), and one end of the limiting spring (272) is clamped on the limiting seat (271), and the other end of the limiting spring (272) is clamped on the slider (242).

9. The intelligent salt spray corrosion test equipment for galvanized steel pipes according to claim 1, characterized in that: The side wall of the positioning frame (26) is provided with a combined groove (28), and the combined groove (28) is composed of a downward groove (281) and a flip groove (282). The downward groove (281) is a vertical groove, and the lowest point of the downward groove (281) is connected to the highest point of the flip groove (282). A sliding rod (283) is slidably provided on the combined groove (28), and the sliding rod (283) is connected to the connecting frame (24). The connecting frame (24) first slides vertically along the downward groove (281), and rotates its angle after sliding to the flip groove (282).

10. The intelligent salt spray corrosion test equipment for galvanized steel pipes according to claim 1, characterized in that: A mounting frame (311) is mounted on the side wall of the secondary bevel gear (31), and the mounting frame (311) is welded to the side wall of the detection box (1).

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