Corrosion resistance detection device for stainless steel pipe

Abstract

The invention belongs to the technical field of stainless steel pipe corrosion resistance detection, and particularly relates to a stainless steel pipe corrosion resistance detection device which comprises a transparent glass box, a lifting mechanism is fixedly installed in the transparent glass box, a lifting arm is installed on the lifting mechanism, and a lifting mechanism used for fixing a pipe fitting is installed at the end of the lifting arm. A liquid storage box is arranged under the lifting mechanism, the lifting mechanism comprises a main pipe body, the upper end of the main pipe body is rotationally connected with a lifting arm, the lower end of the main pipe body is fixedly connected with a lower fixing seat, a rotating disc is rotationally installed in the lower fixing seat, and three ejector pin mechanisms are distributed around the rotating disc at equal angles. The inner wall and the outer wall of the pipe fitting can make uniform contact with detection liquid, and the detection accuracy of the pipe fitting is improved.

Description

Technical Field

[0001] This invention belongs to the field of stainless steel pipe corrosion resistance testing technology, specifically a stainless steel pipe corrosion resistance testing device. Background Technology

[0002] Although stainless steel pipes have a natural passivation film, latent defects such as intergranular corrosion, pitting corrosion, and stress corrosion cracking may still occur during welding, heat treatment, or service environments. Corrosion resistance testing, by simulating harsh conditions such as acids, salts, and high temperatures, exposes potential problems such as material sensitization, component segregation, and surface contamination in advance, and verifies the integrity and uniformity of its passivation film. The test results directly determine whether the pipeline can operate safely for a long time in highly corrosive media such as chemical, marine, and nuclear power plants, avoiding major accidents such as leaks, explosions, and production shutdowns caused by local perforation.

[0003] Patent CN221667554U discloses a stainless steel pipe corrosion testing device, including a liquid storage tank, a controller, a liquid filling pipe, a sealing head, a drain pipe, a manual valve, and a bracket. The controller is fixedly installed on the front of the liquid storage tank, and the top of one side of the liquid storage tank is connected to the liquid filling pipe. The end of the liquid filling pipe away from the liquid storage tank is threadedly connected to the sealing head. This solution, by setting up a circulation component, can uniformly spray the stainless steel pipe sample in the sealed tank at 360°, so that the test liquid completely covers the pipe wall, improving the consistency and reliability of the corrosion test. With the help of the reflux hole, upper and lower filters and reflux pipe, the liquid is filtered and recovered in time, realizing the closed-loop circulation of the test liquid, significantly reducing consumption and testing costs.

[0004] In the above-mentioned method, the test liquid is sprayed onto the stainless steel pipe by spraying. Since the nozzle is facing the outside of the stainless steel pipe, the nozzle can spray the test liquid evenly on the outside of the stainless steel pipe. However, the inner ring of the stainless steel pipe can only come into contact with a small amount of sprayed test liquid, resulting in uneven spraying on the inside and outside of the stainless steel pipe, which affects the accuracy of the test. Therefore, the present invention provides a stainless steel pipe corrosion resistance testing device. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: A stainless steel pipe corrosion testing device of this invention includes a transparent glass box, a lifting mechanism fixedly installed inside the transparent glass box, a lifting arm installed on the lifting mechanism, a pulling mechanism for fixing the pipe fittings installed at the end of the lifting arm, a liquid storage box located directly below the pulling mechanism, the pulling mechanism including a main body, the upper end of the main body rotatably connected to the lifting arm, the lower end of the main body fixedly connected to a lower fixed seat, a rotating disk rotatably installed in the lower fixed seat, three sets of pin mechanisms evenly distributed around the rotating disk, a rotating tube rotatably installed inside the main body, the lower end of the rotating tube fixedly connected to the rotating disk, a pressure plate movably installed inside the rotating tube, a first spring located below the pressure plate, and two sets of pins symmetrically fixedly installed on the pressure plate. A movable plate is fixedly connected to one end of a connecting pin shaft, a hook is fixedly connected to the movable plate, two sets of locking plates engage the hook, and the locking plates are fixedly installed on the outer wall of the main body. The ejector mechanism includes an ejector seat, which is movably installed inside a rotating disk, two sets of guide pillars fixedly installed on the ejector seat, a pressure plate slidably connected to the two sets of guide pillars, a second spring sleeved on the guide pillars, an ejector body fixedly installed on the pressure plate, a first support plate fixedly connected to the ejector seat, several sets of rectangular grooves are provided on the lower fixed seat, a slide rod is fixedly installed in the rectangular groove, the ejector seat is slidably connected to the slide rod, a first shaft is provided at the end of the first support plate, a first guide groove is provided on the upper surface of the rotating disk, the first shaft is located in the first guide groove, the first guide groove is composed of a first arc groove and a second arc groove, a spiral groove is provided on the rotating tube, and the pin shaft passes through the spiral groove. By immersing the pipe fittings in the testing solution, the inner and outer walls of the pipe fittings can be evenly contacted with the testing solution, thereby improving the accuracy of pipe fitting testing.

[0007] Preferably, the lifting mechanism further includes a transmission mechanism, which includes a first pulley, which is fixedly mounted on the main body, one end of a synchronous belt is wrapped around the first pulley, the other end of the synchronous belt is wrapped around a second pulley, and the second pulley is rotatably mounted on the lifting arm. The centrifugal force generated by the rotation will shake off the test liquid adhering to the pipe fittings, thus speeding up the removal of the test liquid from the pipe fittings and improving the testing efficiency of the pipe fittings.

[0008] Preferably, three sets of reinforcement mechanisms are also provided around the rotating disk. The reinforcement mechanism includes a reinforcement block, a rubber pad fixedly installed on the reinforcement block, two sets of guide rails slidably connected to the reinforcement block, both sets of guide rails being fixedly installed in the lower fixed seat, and a second support plate fixedly connected to the reinforcement block. The lifting mechanism also includes a slide rail, which is fixedly installed on the outer wall of the main body, and an unlocking seat slidably connected to the slide rail. Three sets of guide holes are opened at equal angles on the outer ring of the lower fixed seat, and the reinforcement block is movably inserted into the guide holes. A second shaft is provided at the end of the second support plate. Three sets of second guide grooves are opened at equal angles on the lower end face of the rotating disk. The second shaft is located in the second guide groove. The second guide groove is composed of a third arc groove and a fourth arc groove. A pressure rod is rotatably installed on the pressure plate, and a U-shaped frame for pressing down the pressure rod is fixedly installed on the lifting mechanism. The lifting mechanism moves the pipe downwards, releasing the U-shaped frame from squeezing the pressure bar. Under the rebound force of the first spring, the end of the hook drives the unlocking seat to move upwards along the slide rail until the unlocking seat moves between the two sets of locking plates and can no longer move. The end of the hook will automatically disengage from the unlocking seat and the two sets of locking plates, thereby automatically releasing the fixation of the pipe and making it easier for workers to remove the pipe.

[0009] The beneficial effects of this invention are as follows: 1. By immersing the pipe fittings in the testing solution, the inner and outer walls of the pipe fittings can be evenly contacted with the testing solution, thereby improving the accuracy of pipe fitting testing.

[0010] 2. After the tube is removed from the test liquid, a set of motors drives the second pulley to rotate. The second pulley rotates the first pulley and the main tube body together through the synchronous belt. The main tube body drives the tube to rotate through the lower fixed seat and the three sets of ejector pins. The centrifugal force generated by the rotation throws off the test liquid attached to the tube, speeding up the removal of the test liquid from the tube and improving the testing efficiency of the tube.

[0011] 3. As the pipe continues to move upward, the pressure bar is squeezed by the U-shaped frame, causing it to push the pressure plate downward. The first spring is further compressed by the pressure plate, while the two sets of pins continue to slide along their corresponding spiral grooves. Guided by these grooves, the rotating disk rotates again. As the disk rotates, the first shaft slides along the second arc-shaped groove, the center of which coincides with the center of the rotating disk. Therefore, guided by the second arc-shaped groove, the ejector pin body maintains a fixed pressure on the inner wall of the pipe. Simultaneously, the second shaft slides along the fourth arc-shaped groove... The center of the circle does not coincide with the center of the rotating disk. Guided by the fourth arc groove, the second shaft moves the second support plate, the reinforcing block, and the rubber pad towards the inner wall of the pipe. The reinforcing block slides along the guide rail until the rubber pad is pressed against the inner wall of the pipe. At the same time, the descending hook end will press against the unlocking seat, causing the hook to bend to one side. Under the action of the hook's rebound force, the hook end is pressed tightly against the unlocking seat. At this time, the upward movement of the pipe is paused, and the pipe is driven to rotate. Because the rubber pad is pressed against the inner wall of the pipe, the contact area between the entire lifting mechanism and the inner wall of the pipe is increased, thereby improving the stability of the pipe. Attached Figure Description

[0012] The invention will now be further described with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 This is a schematic diagram of the lifting mechanism, lifting arm, lifting mechanism, and pipe assembly of the present invention.

[0015] Figure 3 This is a cross-sectional schematic diagram of the lifting mechanism of the present invention.

[0016] Figure 4 This is a schematic diagram of the combination of the rotating disk and the ejector pin mechanism of the present invention.

[0017] Figure 5 This is a schematic diagram of the combination of the rotating tube, pressure plate, pin, and movable plate of the present invention.

[0018] Figure 6 This is a schematic diagram of the combination of the lifting arm and the lifting mechanism of the present invention.

[0019] Figure 7 This is a cross-sectional schematic diagram of the combination of the fixed base, rotating disk, ejector pin mechanism and reinforcing mechanism of the present invention.

[0020] Figure 8 This is a schematic diagram of the combination of the rotating disk and the reinforcement mechanism of the present invention.

[0021] Figure 9 This is a schematic diagram showing the cross-sectional view of the main pipe, the cross-sectional view of the rotating pipe, the pressure plate, the movable plate, the hook, the locking plate, the slide rail, and the unlocking seat of the present invention.

[0022] Figure 10 This is a schematic diagram of the combination of the lifting mechanism, lifting arm, and lifting mechanism of the present invention.

[0023] In the diagram: 1. Transparent glass box; 2. Lifting mechanism; 201. U-shaped frame; 3. Lifting arm; 4. Lifting mechanism; 401. Main body; 402. Lower fixed base; 21. Rectangular groove; 22. Slide rod; 23. Guide hole; 403, Rotary disk; 4031, First guide groove; 311, First arc-shaped groove; 312, Second arc-shaped groove; 4032, Second guide groove; 321, Third arc-shaped groove; 322, Fourth arc-shaped groove; 404, Ejector mechanism; 4041, Ejector seat; 4042, Guide post; 4043, Pressure plate; 4044, Second spring; 4045, Ejector body; 4046, First support plate; 61, First shaft; 405. Pressure plate; 4051. Pressure rod; 406. First spring; 407. Pin; 408. Movable plate; 409. Hook; 410. Clamping plate; 411. Transmission mechanism; 4111. First pulley; 4112. Synchronous belt; 4113. Second pulley; 412. Reinforcing mechanism; 4121. Reinforcing block; 4122. Rubber pad; 4123. Guide rail; 4124. Second support plate; 41. Second shaft; 413. Slide rail; 414. Unlocking seat; 415. Rotary tube; 4151. Spiral groove; 5. Pipe fittings; 6. Liquid storage box. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0025] Example 1: As Figures 1 to 5As shown in the embodiment of the present invention, a stainless steel pipe corrosion testing device includes a transparent glass box 1. A lifting mechanism 2 is fixedly installed inside the transparent glass box 1. A lifting arm 3 is installed on the lifting mechanism 2. A lifting mechanism 4 for fixing pipe fittings 5 ​​is installed at the end of the lifting arm 3. A liquid storage box 6 is arranged directly below the lifting mechanism 4. The lifting mechanism 4 includes a main body 401. The upper end of the main body 401 is rotatably connected to the lifting arm 3, and the lower end of the main body 401 is fixedly connected to a lower fixed seat 402. A rotating mechanism rotatably installed in the lower fixed seat 402... Turntable 403, three sets of ejector pin mechanisms 404 evenly distributed around the turntable 403, a rotating tube 415 rotatably installed inside the main tube body 401, the lower end of the rotating tube 415 fixedly connected to the turntable 403, a pressure plate 405 movably installed inside the rotating tube 415, a first spring 406 provided below the pressure plate 405, two sets of pins 407 symmetrically fixedly installed on the pressure plate 405, a movable plate 408 fixedly connected to one end of the pins 407, and a hook 409 fixedly connected to the movable plate 408. The system includes two sets of clamping plates 410, which are fixedly installed on the outer wall of the main body 401. The ejector mechanism 404 includes an ejector seat 4041, which is movably installed inside the rotating disk 403. Two sets of guide posts 4042 are fixedly installed on the ejector seat 4041. A pressure plate 4043 is slidably connected to the two sets of guide posts 4042. A second spring 4044 is sleeved on the guide posts 4042. An ejector body 4045 is fixedly installed on the pressure plate 4043. A first support plate 4046 is fixedly connected to the ejector seat 4041. The lower fixed base 402 has several sets of rectangular grooves 21, and a slide rod 22 is fixedly installed in the rectangular groove 21. The ejector pin seat 4041 is slidably connected to the slide rod 22. The end of the first support plate 4046 is provided with a first shaft 61. The upper end face of the rotating disk 403 is provided with a first guide groove 4031. The first shaft 61 is located in the first guide groove 4031. The first guide groove 4031 is composed of a first arc groove 311 and a second arc groove 312. The rotating tube 415 is provided with a spiral groove 4151, and the pin 407 passes through the spiral groove 4151.

[0026] Specifically, the lifting mechanism 2 adopts an existing ball screw structure. The liquid storage box 6 contains the test liquid. The hook 409 is made of stainless steel with good elasticity. When corrosion resistance testing of the pipe fitting 5 is required, the transparent glass box 1 is opened, and the pipe fitting 5 is suspended directly below the lifting mechanism 4. Then, the pipe fitting 5 is lifted vertically upward, so that the lower fixed seat 402 enters the inner ring of the pipe fitting 5. Then, a set of movable plates 408 is pressed down. The movable plates 408 drive the pressure plate 405 to move downward along the inner cavity of the rotating tube 415 through the pin 407. The pressure plate 405 compresses the first spring 406. At the same time, the movable plates 408 drive the hook 409. Moving downwards, the pin 407 slides along the spiral groove 4151. Guided by the spiral groove 4151, the rotating tube 415 rotates along with the rotating disk 403. As the rotating disk 403 rotates, the three sets of first shafts 61 first slide along their corresponding first arc grooves 311. Guided by the first arc grooves 311, the first shafts 61 drive the first support plate 4046, along with the ejector seat 4041, the pressure plate 4043, and the ejector body 4045, to move towards the inner wall of the pipe fitting 5. This causes the ejector body 4045 to press against the inner wall of the pipe fitting 5. The counterforce from the inner wall of the pipe fitting 5 acts on the pressure plate 4043, causing... The pressure plate 4043 slides along the two sets of guide posts 4042, and the pressure plate 4043 compresses the second spring 4044 until the end of the descending hook 409 is squeezed by the two sets of clamping plates 410. Under the rebound force of the hook 409, the end of the hook 409 engages with the two sets of clamping plates 410. At the same time, the first shaft 61 is located at the intersection of the first arc groove 311 and the second arc groove 312. Under the rebound force of the second spring 4044, the three sets of ejector pin bodies 4045 maintain the pressure on the inner wall of the tube 5, so that the tube 5 is fixed on the lifting mechanism 4. Then, the lifting mechanism 2 drives the lifting arm 3 together with the lifting mechanism 4 and the tube. The tube 5 moves downward, immersing it in the detection liquid in the storage box 6. After the tube 5 has been immersed in the detection liquid for a period of time, the lifting mechanism 2 removes the tube 5 from the detection liquid. Then, the hook 409 is activated to release the engagement between the hook 409 and the plate 410. Under the rebound force of the first spring 406, the pressure of the three sets of ejector pin bodies 4045 on the inner wall of the tube 5 is released. Then, the tube 5 is removed, and the condition of the inner and outer walls of the tube 5 is observed, thus realizing the detection of the tube 5. Compared with the existing technology, by immersing the tube 5 in the detection liquid, the inner and outer walls of the tube 5 can be evenly contacted with the detection liquid, improving the accuracy of the detection of the tube 5.

[0027] like Figure 6 As shown, the lifting mechanism 4 also includes a transmission mechanism 411. The transmission mechanism 411 includes a first pulley 4111, which is fixedly mounted on the main body 401. One end of the synchronous belt 4112 is wrapped around the first pulley 4111, and the other end of the synchronous belt 4112 is wrapped around the second pulley 4113. The second pulley 4113 is rotatably mounted on the lifting arm 3.

[0028] Specifically, after removing the fitting 5 from the test liquid, a large amount of test liquid will adhere to the fitting 5. If the fitting 5 is removed directly for observation, the test liquid on the fitting 5 will spill into the surrounding environment, causing environmental pollution. Therefore, it is necessary to wait for a period of time for the fitting 5 to dry out the test liquid. The waiting time will delay the staff's inspection of the fitting 5 and reduce the testing efficiency of the fitting 5. Therefore, after the tube 5 is removed from the detection liquid, a set of motors drives the second pulley 4113 to rotate. The second pulley 4113 causes the first pulley 4111 and the main tube 401 to rotate through the synchronous belt 4112. The main tube 401 drives the tube 5 to rotate through the lower fixed seat 402 and the three sets of ejector pin bodies 4045. The centrifugal force generated by the rotation will shake off the detection liquid attached to the tube 5, speeding up the removal of the detection liquid from the tube 5 and improving the detection efficiency of the tube 5.

[0029] Example 2: Figures 7 to 10 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: three sets of reinforcing mechanisms 412 are also provided around the rotating disk 403. The reinforcing mechanism 412 includes a reinforcing block 4121, a rubber pad 4122 fixedly installed on the reinforcing block 4121, two sets of guide rails 4123 slidably connected to the reinforcing block 4121, both sets of guide rails 4123 being fixedly installed in the lower fixed seat 402, and a second support plate 4124 fixedly connected to the reinforcing block 4121. The lifting mechanism 4 also includes a slide rail 413, which is fixedly installed on the outer wall of the main body 401 and slidably connected to the slide rail 413. The unlocking seat 414 and the lower fixed seat 402 have three sets of guide holes 23 at equal angles on the outer ring. The reinforcing block 4121 is movably inserted into the guide holes 23. The end of the second support plate 4124 is provided with a second shaft 41. The lower end face of the rotating disk 403 has three sets of second guide grooves 4032 at equal angles. The second shaft 41 is located in the second guide groove 4032. The second guide groove 4032 is composed of a third arc groove 321 and a fourth arc groove 322. A pressure rod 4051 is rotatably installed on the pressure plate 405. A U-shaped frame 201 for pressing down the pressure rod 4051 is fixedly installed on the lifting mechanism 2.

[0030] Specifically, when the tube 5 is rotated at high speed, the contact area between the ejector body 4045 and the inner wall of the tube 5 is very small, resulting in low friction between the ejector body 4045 and the inner wall of the tube 5. This makes it easy for the tube 5 to detach from the lifting mechanism 4. Furthermore, to release the tube 5 from the lifting mechanism 4, the operator needs to manually move the hook 409, which results in low operating efficiency and increased inconvenience. The height of the inclined surface at the end of the unlocking seat 414 is greater than the height of the inclined surface on the card plate 410, and the distance between the two sets of card plates 410 is greater than the thickness of the unlocking seat 414. Therefore, when the fitting 5 is removed from the testing liquid, before the pressure rod 4051 contacts the U-shaped frame 201, the first shaft 61 is located at the intersection of the first arc groove 311 and the second arc groove 312, and the second shaft 41 is located at the intersection of the third arc groove 321 and the fourth arc groove 322. As the fitting 5 continues to move upward, the pressure rod 4051 will be squeezed by the U-shaped frame 201, causing the pressure rod 4051 to push the pressure plate 405 to continue to move downward, and the first spring 406 will be further compressed by the pressure plate 405. At the same time, the two sets of pins 407 continue to slide along the corresponding spiral grooves 4151. Guided by the spiral groove 4151, the rotating disk 403 will rotate again. As the rotating disk 403 rotates, the first shaft 61 will slide along the second arc groove 312. The center of the second arc groove 312 coincides with the center of the rotating disk 403. Therefore, guided by the second arc groove 312, the ejector body 4045 will maintain a fixed pressure on the inner wall of the pipe fitting 5. At the same time, the second shaft 41 will slide along the fourth arc groove 322. The center of the fourth arc groove 322 does not coincide with the center of the rotating disk 403. Guided by the fourth arc groove 322, the second shaft 41 will drive the second support plate 4124. The reinforcing block 4121 and rubber pad 4122 move towards the inner wall of the pipe fitting 5. The reinforcing block 4121 slides along the guide rail 4123 until the rubber pad 4122 presses against the inner wall of the pipe fitting 5. At the same time, the end of the descending hook 409 will press against the unlocking seat 414, causing the hook 409 to bend to one side. Under the rebound force of the hook 409, the end of the hook 409 is pressed tightly against the unlocking seat 414. At this time, the upward movement of the pipe fitting 5 is paused, and the pipe fitting 5 is driven to rotate. Due to the pressure of the rubber pad 4122 against the inner wall of the pipe fitting 5, the contact area between the entire lifting mechanism 4 and the inner wall of the pipe fitting 5 is increased, thereby improving the lifting effect. To ensure the stability of pipe fitting 5, when pipe fitting 5 needs to be removed, the lifting mechanism 2 moves pipe fitting 5 downward, releasing the pressure of U-shaped frame 201 on bearing rod 4051. Under the rebound force of the first spring 406, the end of hook 409 drives unlocking seat 414 to move upward along slide rail 413 until unlocking seat 414 moves between two sets of locking plates 410 and can no longer move. The end of hook 409 will automatically disengage from unlocking seat 414 and two sets of locking plates 410, thereby automatically releasing the fixation of pipe fitting 5, making it easy for workers to remove pipe fitting 5.

[0031] Working principle: Open the transparent glass box 1, suspend the pipe 5 directly below the lifting mechanism 4, then lift the pipe 5 vertically upwards, so that the lower fixed seat 402 enters the inner ring of the pipe 5. Then, press down a set of movable plates 408. The movable plates 408 drive the pressure plate 405 to move downwards along the inner cavity of the rotating tube 415 through the pin 407, and the pressure plate 405 compresses the first spring 406. At the same time, the movable plates 408 drive the hook 409 to move downwards, and the pin 407 slides along the spiral groove 4151, guiding the spiral groove 4151. The rotating tube 415, along with the rotating disk 403, rotates. As the rotating disk 403 rotates, the three sets of first shafts 61 slide along their corresponding first arc grooves 311. Guided by the first arc grooves 311, the first shafts 61 drive the first support plate 4046, along with the ejector seat 4041, pressure plate 4043, and ejector body 4045, to move towards the inner wall of the pipe fitting 5. This causes the ejector body 4045 to press against the inner wall of the pipe fitting 5. The counterforce from the inner wall of the pipe fitting 5 acts on the pressure plate 4043, causing the pressure plate 4045 to... 43 slides along the two sets of guide posts 4042, and the pressure plate 4043 compresses the second spring 4044 until the end of the descending hook 409 is squeezed by the two sets of clamping plates 410. Under the rebound force of the hook 409, the end of the hook 409 engages with the two sets of clamping plates 410. At the same time, the first shaft 61 is located at the intersection of the first arc groove 311 and the second arc groove 312. Under the rebound force of the second spring 4044, the three sets of ejector pin bodies 4045 maintain the pressure on the inner wall of the tube 5, so that the tube 5 is fixed on the lifting mechanism 4. Then, the lifting mechanism 2 drives the lifting arm 3, together with the lifting mechanism 4 and the tube 5, to move downwards, so that the tube 5 is immersed in the detection liquid in the liquid storage box 6. After the tube 5 has been immersed in the detection liquid for a period of time, the lifting mechanism 2 makes the tube 5 detach from the detection liquid. Then, the hook 409 is moved to release the hook 409 from the plate 410. Under the rebound force of the first spring 406, the pressure of the three sets of ejector pin bodies 4045 on the inner wall of the tube 5 will be released. Then the tube 5 is taken off and the condition of the inner and outer walls of the tube 5 is observed to realize the detection of the tube 5. After the tube 5 is removed from the test liquid, a set of motors drives the second pulley 4113 to rotate. The second pulley 4113 causes the first pulley 4111 and the main body 401 to rotate through the synchronous belt 4112. The main body 401 drives the tube 5 to rotate through the lower fixed seat 402 and three sets of ejector pin bodies 4045. The centrifugal force generated by the rotation will shake off the test liquid attached to the tube 5. As the pipe fitting 5 continues to move upward, the pressure rod 4051 is squeezed by the U-shaped frame 201, causing the pressure rod 4051 to push the pressure plate 405 to continue moving downward. The first spring 406 is further compressed by the pressure plate 405, while the two sets of pins 407 continue to slide along the corresponding spiral grooves 4151. Guided by the spiral grooves 4151, the rotating disk 403 will rotate again. As the rotating disk 403 rotates, the first shaft 61 will move along the second arc-shaped groove. 312 slides, and the center of the second arc groove 312 coincides with the center of the rotating disk 403. Therefore, guided by the second arc groove 312, the ejector body 4045 will maintain a fixed pressing pressure on the inner wall of the pipe fitting 5. At the same time, the second shaft 41 will move along the fourth arc groove 322, the center of which does not coincide with the center of the rotating disk 403. Guided by the fourth arc groove 322, the second shaft 41 will drive the second support plate 4124, the reinforcing block 4121, and the rubber pad 4. 122 moves towards the inner wall of the pipe fitting 5, and the reinforcing block 4121 slides along the guide rail 4123 until the rubber pad 4122 is pressed against the inner wall of the pipe fitting 5. At the same time, the end of the descending hook 409 will press against the unlocking seat 414, causing the hook 409 to bend to one side. Under the rebound force of the hook 409, the end of the hook 409 will be pressed tightly against the unlocking seat 414. At this time, the upward movement of the pipe fitting 5 is paused, and the pipe fitting 5 is driven to rotate. Next, when it is necessary to remove the pipe fitting 5, the lifting mechanism 2 will move the pipe fitting 5 downward to release the pressure of the U-shaped frame 201 on the bearing rod 4051. Under the rebound force of the first spring 406, the end of the hook 409 will drive the unlocking seat 414 to move upward along the slide rail 413 until the unlocking seat 414 moves between the two sets of locking plates 410 and the unlocking seat 414 can no longer move. The end of the hook 409 will automatically disengage from the unlocking seat 414 and the two sets of locking plates 410, thereby automatically releasing the fixation of the pipe fitting 5.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stainless steel pipe corrosion testing device, comprising a transparent glass box (1), characterized in that: A lifting mechanism (2) is fixedly installed inside the transparent glass box (1). A lifting arm (3) is installed on the lifting mechanism (2). A lifting mechanism (4) for fixing the pipe fitting (5) is installed at the end of the lifting arm (3). A liquid storage box (6) is provided directly below the lifting mechanism (4). The lifting mechanism (4) includes a main body (401), the upper end of which is rotatably connected to the lifting arm (3). The lower end of the main body (401) is fixedly connected to the lower fixed seat (402); Rotate the rotating disk (403) installed in the lower fixed seat (402); Three sets of ejector pin mechanisms (404) are distributed at equal angles around the rotating disk (403); Rotary tube (415) installed inside the main body (401) is rotated, and the lower end of the rotating tube (415) is fixedly connected to the rotating disk (403). A pressure plate (405) is installed inside the rotating tube (415). A first spring (406) is provided below the pressure plate (405); Two sets of pins (407) are symmetrically fixedly installed on the pressure plate (405). A movable plate (408) is fixedly connected to one end of the pin (407); The hook (409) is used to fix the movable plate (408); Two sets of locking plates (410) are engaged with the locking hook (409), and the locking plates (410) are fixedly installed on the outer wall of the main body (401).

2. The stainless steel pipe corrosion resistance testing device according to claim 1, characterized in that: The ejector mechanism (404) includes an ejector seat (4041), which is movably mounted inside the rotating disk (403); Two sets of guide posts (4042) are fixedly installed on the ejector seat (4041); The pressure plate (4043) of the two sets of guide posts (4042) is slidably connected. A second spring (4044) is sleeved on the guide post (4042). The ejector body (4045) is fixedly installed on the pressure plate (4043). The first support plate (4046) is fixedly connected to the ejector pin seat (4041).

3. The stainless steel pipe corrosion resistance testing device according to claim 2, characterized in that: The lower fixed seat (402) is provided with a number of rectangular grooves (21), and a slide rod (22) is fixedly installed in the rectangular groove (21). The ejector pin seat (4041) is slidably connected to the slide rod (22). The end of the first support plate (4046) is provided with a first shaft (61). The upper surface of the rotating disk (403) is provided with a first guide groove (4031). The first shaft (61) is located in the first guide groove (4031). The first guide groove (4031) is composed of a first arc groove (311) and a second arc groove (312).

4. The stainless steel pipe corrosion resistance testing device according to claim 3, characterized in that: The rotating tube (415) has a spiral groove (4151) and the pin (407) passes through the spiral groove (4151).

5. The stainless steel pipe corrosion resistance testing device according to claim 4, characterized in that: The lifting mechanism (4) further includes a transmission mechanism (411), which includes a first pulley (4111) and is fixedly mounted on the main body (401). A timing belt (4112), one end of which is wrapped around the first pulley (4111), and the other end of which is wrapped around the second pulley (4113); The second pulley (4113) is rotatably mounted on the lifting arm (3).

6. The stainless steel pipe corrosion resistance testing device according to claim 5, characterized in that: Three sets of reinforcement mechanisms (412) are also provided around the rotating disk (403), and the reinforcement mechanism (412) includes a reinforcement block (4121). A rubber pad (4122) is fixedly installed on the reinforcing block (4121). Two sets of guide rails (4123) are provided, and the reinforcing block (4121) is slidably connected to the two sets of guide rails (4123). Both sets of guide rails (4123) are fixedly installed in the lower fixing seat (402). The second support plate (4124) is fixedly connected to the reinforcing block (4121).

7. The stainless steel pipe corrosion resistance testing device according to claim 6, characterized in that: The lifting mechanism (4) also includes a slide rail (413), which is fixedly installed on the outer wall of the main body (401); The unlocking seat (414) is slidably connected to the slide rail (413).

8. The stainless steel pipe corrosion resistance testing device according to claim 7, characterized in that: The lower fixing seat (402) has three sets of guide holes (23) at equal angles on its outer ring, and the reinforcing block (4121) is movably inserted into the guide holes (23).

9. The stainless steel pipe corrosion resistance testing device according to claim 8, characterized in that: The second support plate (4124) is provided with a second shaft (41) at its end. The lower end face of the rotating disk (403) is provided with three sets of second guide grooves (4032) at equal angles. The second shaft (41) is located in the second guide groove (4032).

10. A stainless steel pipe corrosion resistance testing device according to claim 9, characterized in that: The second guide groove (4032) is composed of a third arc groove (321) and a fourth arc groove (322). A pressure rod (4051) is rotatably mounted on the pressure plate (405). A U-shaped frame (201) for pressing down the pressure rod (4051) is fixedly mounted on the lifting mechanism (2).

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