Marine anticorrosive coating testing device

Abstract

The utility model discloses a marine anticorrosive coating testing device which comprises a cabinet body, a translation driving device, a liquid discharge pipe and a plurality of groups of pipe joints, and the cabinet body consists of an upper cabinet and a lower cabinet which are distributed up and down. According to the utility model, a plurality of samples are respectively placed in the plurality of placing tubes for testing, the translation driving device drives the sliding seat to sequentially move below the plurality of placing tubes according to the experiment progress, the placing tubes are taken down by virtue of the magnetic attraction effect of the electromagnetic column through the extension and retraction of the extension shaft of the cylinder, and then the samples can be taken away by opening the lower door. The through hole from which the placing pipe is taken away is covered by the turning cover controlled by the torsion spring, so that the internal environment change of the upper cabinet is very small, a plurality of samples can be sequentially taken out according to different stages under the condition that the internal experiment environment of the upper cabinet is not changed, the experiment accuracy is greatly improved, and the practicability is very high.

Description

Technical Field

[0001] The utility model relates to the technical field of marine anti-corrosion coatings, in particular to a marine anti-corrosion coating testing device. Background Art

[0002] In order to meet the development needs of environmental protection, energy saving and corrosion resistance of surface anti-corrosion engineering of marine metal equipment in my country, there has been technology in the existing technology to study new environmentally friendly coatings. The main research direction is to study the feasibility of non-toxic anodic corrosion inhibitor modified zinc-rich coating to replace traditional marine Dacromet coating. For this purpose, it is necessary to carry out simulated marine corrosion tests on the prepared coatings.

[0003] At present, the detection methods for marine anti-corrosion coatings mainly use indoor simulation experiments, accelerated corrosion experiments, and real sea hanging experiments. Among them, the accelerated corrosion experiment is to conduct periodic chloride salt and microbial bacterial corrosion acceleration tests through salt spray test equipment to detect the changes in surface morphology and composition of coating samples before and after corrosion. On the one hand, by comparing and analyzing the corrosion test results of modified coating samples in simulated marine chloride salt environment and SRB environment, the coating preparation process control measures are mastered to prepare coatings with better corrosion resistance; on the other hand, by analyzing the corrosion morphology and products of the coating surface and the electrochemical test results, the corrosion resistance mechanism of the coating samples under the action of chloride salt and microbial bacterial corrosion is revealed, providing experimental theoretical basis and practical application technical support for the performance improvement and balance of high-quality marine anti-corrosion zinc-rich coatings;

[0004] The salt spray test equipment used for accelerated corrosion experiments in the prior art, such as a salt spray test box, includes a test box body, and a salt spray control mechanism is provided at the top of the inner part of the test box body; the salt spray control mechanism includes a hot air blower and an exhaust fan. This technology measures the pressure of the gas inside the test box body in real time through an industrial airtight sensor, thereby calculating the concentration, and through the first baffle plate and the second baffle plate being matched and having a split structure, during the telescopic operation of the cylinder, the first baffle plate and the second baffle plate are driven to open downward or match upward for sealing, thereby discharging or extracting an appropriate amount of gas, thereby conveniently and accurately controlling the salt spray, and improving the test efficiency and the test accuracy;

[0005] However, the salt spray test chamber proposed in the above-mentioned prior art has certain drawbacks when applied to the new environmentally friendly marine anti-corrosion coating laboratory: during the accelerated corrosion experiment, it is necessary to test multiple samples under the same environment and take them out at different experimental times to better analyze the corrosion morphology and products of the coating surface and the electrochemical test results. However, although the salt spray test chamber in the prior art can test multiple samples in sequence, it does not support taking out in time periods. When taking them out, the gas containing hydrochloric acid inside must be evacuated, and then a sample must be taken out for testing and then the accelerated corrosion experiment environment must be recreated. First, it is time-consuming, and second, the corrosion experiment environment created again will be quite different from the environment created for the first time, affecting the accuracy of the test. For this reason, it is necessary to further improve the structure of the marine anti-corrosion coating testing device. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and proposes a marine anti-corrosion coating testing device.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a marine anti-corrosion coating testing device, including a cabinet, a translation drive device, a drain pipe and multiple groups of pipe joints, the cabinet body is composed of an upper cabinet and a lower cabinet distributed up and down, a partition is fixedly connected between the upper cabinet and the lower cabinet, the drain pipe is arranged on the rear wall of the upper cabinet and the horizontal height is located above the partition, multiple groups of pipe joints are arranged on the right side wall of the upper cabinet, the right wall of the lower cabinet is provided with a control panel, the front wall of the lower cabinet and the front wall of the upper cabinet are respectively provided with a lower door and an upper door, the translation drive device is composed of two groups of motors, slide rails, screws and screw sleeves, the translation drive device is arranged on the lower wall of the inner side of the lower cabinet, the lower wall of the inner side of the lower cabinet is slidably connected to a sliding seat through the translation drive device, the sliding seat is driven by the translation drive device to realize forward and backward and left and right directions, the upper wall of the sliding seat is fixedly connected to a connecting block through a bracket, a fixed frame is slidably connected to the top of the connecting block through a guide structure, and a screw thread is arranged between the fixed frame and the connecting block. A lifting drive structure for driving the fixed frame to lift up and down, wherein the upper wall of the fixed frame is fixedly connected with a connecting head, the inner wall of the partition is provided with a plurality of through holes distributed in a rectangular array in a top view, the upper wall of the partition is provided with a convex ring located at the periphery of the through hole, the upper wall of the partition is provided with a covering structure for covering the convex ring, the lower wall of the partition is fixedly connected with a holder located at the lower mouth of the through hole, the through hole and the inner wall of the convex ring are slidably connected with a placement tube for placing test products, a sealing structure for sealing is provided between the inner wall of the through hole and the placement tube, the lower end of the placement tube passes through the inner wall of the through hole and the upper wall of the holder in turn and extends into the interior of the holder, the end of the placement tube extending into the interior of the holder is fixedly connected with a base, the outer wall of the base is slidably connected with the inner wall of the holder, a clamping structure for fixing the position of the base is provided between the base and the inner wall of the holder, the lower wall of the base is provided with a connecting cavity for matching with the connecting head, and the end of the connecting head away from the fixed frame is provided with a magnetic attraction structure for removing the base and the placement tube.

[0008] As a further description of the above technical solution:

[0009] The lifting drive structure is a cylinder, which is fixedly connected to the lower wall of the connecting block. The cylinder extension shaft passes through the inner wall of the connecting block and extends above the connecting block. One end of the cylinder extension shaft extending above the connecting block is fixedly connected to the lower wall of the fixing frame.

[0010] As a further description of the above technical solution:

[0011] The guide structure includes two groups of guide rods, which are fixedly connected to the lower wall of the fixing frame and are respectively located at the front and rear sides of the lifting drive structure. The ends of the two groups of guide rods away from the fixing frame penetrate the inner wall of the connecting block and are slidably connected thereto.

[0012] As a further description of the above technical solution:

[0013] The covering structure is a flip cover, which is rotatably connected to the upper wall of the partition through a rotating seat and is located on the rear side of the convex ring. A torsion spring is arranged between the upper wall of the flip cover and the upper wall of the partition. The flip cover covers toward the upper wall of the convex ring through the elasticity of the torsion spring.

[0014] As a further description of the above technical solution:

[0015] The sealing structure is a sealing ring, which is arranged on the inner wall of the through hole in the partition, and the annular inner wall of the sealing ring is slidably connected with the outer wall of the placement tube.

[0016] As a further description of the above technical solution:

[0017] The clamping structure includes a spring pin and an annular groove. The spring pin is arranged on the side wall of the base through a top screw and a spring, and the end of the spring pin away from the axis of the base passes through the outer wall of the base and extends to the outer wall of the base. The annular groove is arranged on the inner wall of the clamping seat. When the horizontal height of the spring pin is consistent with the horizontal height of the annular groove, the base is clamped with the clamping seat through the spring pin and the annular groove.

[0018] As a further description of the above technical solution:

[0019] The magnetic attraction structure is an electromagnetic column, which is fixedly connected to the upper wall of the connector. The outer diameter of the electromagnetic column is matched with the inner diameter of the connecting cavity, and the base is made of a magnetically attractive material.

[0020] The utility model has the following beneficial effects:

[0021] Compared with the prior art, in the marine anti-corrosion coating testing device, multiple samples are placed in multiple placement tubes for testing. According to the progress of the experiment, the sliding seat is driven by the translation drive device to move to the bottom of the multiple placement tubes in turn, and the cylinder extends and retracts the shaft. The placement tubes are removed with the help of the magnetic attraction effect of the electromagnetic column, and then the lower door can be opened to take out the samples. The through holes of the removed placement tubes will be covered by the flip cover controlled by the torsion spring, so that the internal environment of the upper cabinet changes very little, so that multiple samples can be taken out in turn according to different stages without changing the internal experimental environment of the upper cabinet, which greatly improves the accuracy of the experiment and is very practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a marine anti-corrosion coating testing device proposed by the utility model;

[0023] Figure 2 It is a partial cross-sectional view of the internal structure of the upper cabinet of a marine anti-corrosion coating testing device proposed by the utility model;

[0024] Figure 3 A marine anti-corrosion coating testing device proposed by the utility model Figure 2 A partial enlarged view of the middle A;

[0025] Figure 4 This is a partial cross-sectional view of the internal structure of the lower cabinet of a marine anti-corrosion coating testing device proposed by the utility model;

[0026] Figure 5 A marine anti-corrosion coating testing device proposed by the utility model Figure 4 A partial enlarged view of point B in the middle;

[0027] Figure 6 It is a partial sectional view of the side of the partition, flip cover, card seat and placement pipe connection structure of a marine anti-corrosion coating testing device proposed by the utility model;

[0028] Figure 7 A marine anti-corrosion coating testing device proposed by the utility model Figure 6 A partial enlarged view of point C in the middle.

[0029] Legend:

[0030] 1. Lower cabinet; 2. Upper cabinet; 3. Control panel; 4. Lower door; 5. Upper door; 6. Pipe joint; 7. Drain pipe; 8. Partition; 9. Convex ring; 10. Flip cover; 11. Torsion spring; 12. Placement tube; 13. Sliding seat; 14. Bracket; 15. Connecting block; 16. Cylinder; 17. Guide rod; 18. Fixed bracket; 19. Connecting head; 20. Electromagnetic column; 21. Sealing ring; 22. Base; 23. Connecting cavity; 24. Card seat; 25. Spring pin; 26. Ring groove. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Reference Figures 1 to 7 The utility model provides a marine anticorrosive coating testing device: comprising a cabinet, a translation driving device, a drain pipe 7 and a plurality of pipe joints 6, the cabinet being composed of an upper cabinet 2 and a lower cabinet 1 which are distributed up and down, a partition 8 being fixedly connected between the upper cabinet 2 and the lower cabinet 1, the drain pipe 7 being arranged on the rear wall of the upper cabinet 2 and being located above the partition 8 at a horizontal height, and the drain pipe 7 being used to discharge excess liquid;

[0033] like Figure 1As shown, multiple sets of pipe joints 6 are arranged on the right side wall of the upper cabinet 2, a control panel 3 is arranged on the right wall of the lower cabinet 1, and a lower door 4 and an upper door 5 are arranged on the front wall of the lower cabinet 1 and the front wall of the upper cabinet 2, respectively. The upper door 5 is generally not opened, and is only opened for maintenance after the experiment is completed. During the experiment, each sample is taken through the lower door 4. The multiple sets of pipe joints 6 are respectively used to connect the hydrochloric acid control device, the heating device, and the anaerobic SRB bacterial liquid providing device consistent with the existing technology on the market, so as to facilitate the creation of an experimental environment inside the upper cabinet 2;

[0034] like Figure 4 As shown, in order to facilitate the cylinder 16 to take down any one of the multiple placement tubes 12, the translation drive device is composed of two groups of motors, slide rails, screws and screw sleeves. The translation drive device is arranged on the lower wall of the inner side of the lower cabinet 1. The lower wall of the inner side of the lower cabinet 1 is slidably connected with a sliding seat 13 through the translation drive device. The sliding seat 13 is driven by the translation drive device to achieve forward and backward and left and right movement. The translation drive device is a common technology on the market. The two groups of screws are arranged in a cross shape. The two groups of screws are driven by two groups of motors to rotate respectively. The threaded connection relationship between the screw and the screw sleeve enables the screw sleeve to move along the axial direction of the screw, thereby driving the sliding seat 13 to translate longitudinally and transversely, so as to achieve the purpose of the cylinder 16 to grab the multiple placement tubes 12;

[0035] like Figure 4 , Figure 5 As shown, in order to maintain the stability of the fixed frame 18 when it moves up and down, the upper wall of the sliding seat 13 is fixedly connected to the connecting block 15 through the bracket 14, and the upper part of the connecting block 15 is slidably connected to the fixed frame 18 through the guide structure. The guide structure includes two groups of guide rods 17, and the two groups of guide rods 17 are fixedly connected to the lower wall of the fixed frame 18 and are respectively located at the front and rear sides of the lifting drive structure. The ends of the two groups of guide rods 17 away from the fixed frame 18 penetrate the inner wall of the connecting block 15 and are slidably connected thereto. When the lifting drive structure drives the fixed frame 18 to move up and down, in order to improve the stability and the repetitive accuracy of the action, the two groups of guide rods 17 are used for guidance;

[0036] like Figure 4 , Figure 5 As shown, in order to drive the fixing frame 18 and the connecting head 19 to rise and fall, a lifting driving structure for driving the fixing frame 18 to rise and fall is arranged between the fixing frame 18 and the connecting block 15, the connecting head 19 is fixedly connected to the upper wall of the fixing frame 18, and the lifting driving structure is a cylinder 16, which is fixedly connected to the lower wall of the connecting block 15, and the cylinder 16 extends out of the shaft, penetrates the inner wall of the connecting block 15 and extends to the top of the connecting block 15, and the end of the cylinder 16 extending out of the shaft extends to the top of the connecting block 15 and is fixedly connected to the lower wall of the fixing frame 18, and the extension and retraction of the cylinder 16 extending shaft can drive the fixing frame 18 and the connecting head 19 to rise and fall, and when the connecting head 19 is driven to move to the bottom of one of the multiple groups of placement tubes by the translation driving device, the connecting head 19 rises and can enter the inside of the connecting cavity 23;

[0037] like Figure 2 , Figure 3 As shown, in order to close the through hole after the placement tube 12 is removed, the inner wall of the partition 8 is provided with a plurality of through holes distributed in a rectangular array in a top view, and a convex ring 9 is provided on the upper wall of the partition 8 and located at the periphery of the through hole, and a covering structure for covering the convex ring 9 is provided on the upper wall of the partition 8, and the covering structure is a flip cover 10, which is rotatably connected to the upper wall of the partition 8 through a rotating seat and is located at the rear side of the convex ring 9, and a torsion spring 11 is provided between the upper wall of the flip cover 10 and the upper wall of the partition 8, and the flip cover 10 covers toward the upper wall of the convex ring 9 through the elasticity of the torsion spring 11, and in the process of removing the placement tube 12, the torsion spring 11 continuously pushes the flip cover 10 to cover above the convex ring 9, and when the upper end of the placement tube 12 is lower than the upper wall of the convex ring 9, the action of the flip cover 10 covering the convex ring 9 can be completed, thereby achieving the purpose of less change in the internal experimental environment of the upper cabinet 2 after the sample is taken away;

[0038] like Figure 6 As shown, a holder 24 is fixedly connected to the lower wall of the partition 8 and located at the lower opening of the through hole, a placement tube 12 for placing the test product is slidably connected to the inner wall of the through hole and the convex ring 9, and a sealing structure for sealing is arranged between the inner wall of the through hole and the placement tube 12. The sealing structure is a sealing ring 21, which is arranged on the inner wall of the through hole in the partition 8. The annular inner wall of the sealing ring 21 is slidably connected to the outer wall of the placement tube 12, and the sealing between the sampling tube 12 and the inner wall of the through hole is maintained by the sealing ring 21;

[0039] like Figure 6 , Figure 7 As shown, in order to fix the placement tube 12 in the laboratory, the lower end of the placement tube 12 passes through the inner wall of the through hole and the upper wall of the holder 24 in sequence and extends into the interior of the holder 24. The end of the placement tube 12 extending into the interior of the holder 24 is fixedly connected to the base 22, and the outer wall of the base 22 is slidably connected to the inner wall of the holder 24. A clamping structure for fixing the position of the base 22 is provided between the base 22 and the inner wall of the holder 24, and the clamping structure includes a spring pin 25 and an annular groove 26. The spring pin 25 is arranged on the side wall of the base 22 through a top screw and a spring, and one end of the spring pin 25 away from the axis of the base 22 passes through the outer wall of the base 22 and extends to the outer wall of the base 22. The annular groove 26 is arranged on the inner wall of the holder 24. When the horizontal height of the spring pin 25 is consistent with the horizontal height of the annular groove 26, the base 22 is clamped with the holder 24 through the spring pin 25 and the annular groove 26. The base 22 is clamped with the holder 24 through the spring pin 25 and the annular groove 26 to maintain the height position of the placement tube 12.

[0040] like Figure 6 , Figure 7As shown, in order to facilitate the removal of the placement tube 12 from the through hole, a connecting cavity 23 for matching with the connecting head 19 is provided on the lower wall of the base 22, and a magnetic structure for removing the base 22 and the placement tube 12 is provided on the end of the connecting head 19 away from the fixing frame 18. The magnetic structure is an electromagnetic column 20, and the electromagnetic column 20 is fixedly connected to the upper wall of the connecting head 19. The outer diameter of the electromagnetic column 20 is matched with the inner diameter of the connecting cavity 23. The base 22 is made of a magnetically attractive material. After the connecting head 19 is inserted into the connecting cavity 23, the electromagnetic column 20 is energized to generate magnetism, and is adsorbed and fixed to the base 22 by magnetism. At this time, when the cylinder 16 extends the shaft and retracts, the base 22 can be driven downward by the magnetic state, and the spring pin 25 can be squeezed out of the annular groove 26, thereby removing the placement tube 12.

[0041] Working principle: the upper door 5 is usually not opened, and is only opened for maintenance after the experiment is completed. During the experiment, each sample is taken through the lower door 4. Multiple sets of pipe joints 6 are respectively used to connect the hydrochloric acid control device, heating device, and anaerobic SRB bacterial liquid providing device consistent with the existing technology on the market, so as to create an experimental environment inside the upper cabinet 2. Two sets of motors are used to rotate and drive two sets of screws respectively. The threaded connection relationship between the screw and the screw sleeve allows the screw sleeve to move along the axial direction of the screw, thereby driving the sliding seat 13 to move longitudinally and laterally, so as to achieve the purpose of the cylinder 16 to grasp multiple placement tubes 12. When the lifting drive structure drives the fixed frame 18 to rise and fall, in order to improve the stability and the repetitive accuracy of the action, it is guided by two sets of guide rods 17. The cylinder 16 extends and retracts the shaft, which can drive the fixed frame 18 and the connector 19 to rise and fall. When the connector 19 is driven to move to multiple groups through the translation drive device When one of the groups of placement tubes is below, the connector 19 rises to enter the connection cavity 23, and the flip cover 10 covers the upper wall of the convex ring 9 through the elasticity of the torsion spring 11. In the process of removing the placement tube 12, the torsion spring 11 continues to push the flip cover 10 to cover the top of the convex ring 9. When the upper end of the placement tube 12 is lower than the upper wall of the convex ring 9, the flip cover 10 can cover the convex ring 9, thereby achieving the purpose of less change in the experimental environment inside the upper cabinet 2 after the sample is taken out. The sealing ring 21 maintains the seal between the sampling tube 12 and the inner wall of the through hole, and the base 22 is clamped with the holder 24 through the elastic pin 25 and the annular groove 26 to maintain the height position of the placement tube 12. After the connector 19 is inserted into the connection cavity 23, the electromagnetic column 20 is energized to generate magnetism, and is adsorbed and fixed to the base 22 by magnetism. At this time, when the cylinder 16 extends the shaft and retracts, the base 22 can be driven downward by the magnetic attraction state to squeeze the elastic pin 25 out of the annular groove 26, thereby removing the placement tube 12.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A marine anti-corrosion coating testing device, characterized in that: The invention comprises a cabinet body, a translation driving device, a drainage pipe (7) and a plurality of pipe joints (6); the cabinet body is composed of an upper cabinet (2) and a lower cabinet (1) which are arranged in an upper and lower manner; a partition (8) is fixedly connected between the upper cabinet (2) and the lower cabinet (1); the drainage pipe (7) is arranged on the rear wall of the upper cabinet (2) and is located above the partition (8); the plurality of pipe joints (6) are arranged on the right side wall of the upper cabinet (2); the right wall of the lower cabinet (1) is provided with a control panel (3); the front wall of the lower cabinet (1) and the front wall of the upper cabinet (2) are respectively provided with a lower door (4) and an upper door (5); the translation driving device comprises two groups of motors, a slide rail, The lower cabinet (1) is composed of a screw rod and a screw sleeve, the translation driving device is arranged on the lower wall of the inner side of the lower cabinet (1), the lower wall of the inner side of the lower cabinet (1) is slidably connected to a sliding seat (13) through the translation driving device, the sliding seat (13) is driven by the translation driving device to achieve forward and backward and left and right movement, the upper wall of the sliding seat (13) is fixedly connected to a connecting block (15) through a bracket (14), the upper part of the connecting block (15) is slidably connected to a fixing frame (18) through a guide structure, a lifting driving structure for driving the fixing frame (18) to lift and lower is arranged between the fixing frame (18) and the connecting block (15), and the upper part of the fixing frame (18) is fixedly connected to a connecting block (15) through a bracket (14). The wall is fixedly connected with a connector (19), the inner wall of the partition (8) is provided with a plurality of through holes distributed in a rectangular array in a top view, the upper wall of the partition (8) is provided with a convex ring (9) located at the periphery of the through hole, the upper wall of the partition (8) is provided with a covering structure for covering the convex ring (9), the lower wall of the partition (8) is fixedly connected with a holder (24) located at the lower mouth of the through hole, the inner side wall of the through hole and the convex ring (9) is slidably connected with a placement tube (12) for placing the test product, a sealing structure for sealing is provided between the inner side wall of the through hole and the placement tube (12), and the lower end of the placement tube (12) passes through the inner side wall of the through hole in sequence. The side wall and the upper wall of the card seat (24) extend into the interior of the card seat (24); one end of the placement tube (12) extending into the interior of the card seat (24) is fixedly connected to the base (22); the outer wall of the base (22) is slidably connected to the inner wall of the card seat (24); a clamping structure for fixing the position of the base (22) is provided between the base (22) and the inner wall of the card seat (24); the lower wall of the base (22) is provided with a connecting cavity (23) for matching with the connecting head (19); and the end of the connecting head (19) away from the fixing frame (18) is provided with a magnetic attraction structure for removing the base (22) and the placement tube (12).

2. A marine anti-corrosion coating testing device according to claim 1, characterized in that: The lifting drive structure is a cylinder (16), and the cylinder (16) is fixedly connected to the lower wall of the connecting block (15). The extension shaft of the cylinder (16) passes through the inner wall of the connecting block (15) and extends to the top of the connecting block (15). The end of the extension shaft of the cylinder (16) extending to the top of the connecting block (15) is fixedly connected to the lower wall of the fixing frame (18).

3. A marine anti-corrosion coating testing device according to claim 2, characterized in that: The guide structure comprises two groups of guide rods (17), the two groups of guide rods (17) are fixedly connected to the lower wall of the fixing frame (18) and are respectively located at the front and rear sides of the lifting drive structure, and the ends of the two groups of guide rods (17) away from the fixing frame (18) penetrate the inner wall of the connecting block (15) and are slidably connected thereto.

4. A marine anti-corrosion coating testing device according to claim 3, characterized in that: The covering structure is a flip cover (10), which is rotatably connected to the upper wall of the partition (8) through a rotating seat and is located on the rear side of the convex ring (9). A torsion spring (11) is provided between the upper wall of the flip cover (10) and the upper wall of the partition (8). The flip cover (10) covers the upper wall of the convex ring (9) through the elasticity of the torsion spring (11).

5. A marine anti-corrosion coating testing device according to claim 4, characterized in that: The sealing structure is a sealing ring (21), which is arranged on the inner wall of the through hole in the partition (8), and the annular inner wall of the sealing ring (21) is slidably connected to the outer wall of the placement tube (12).

6. A marine anti-corrosion coating testing device according to claim 5, characterized in that: The clamping structure comprises an elastic pin (25) and an annular groove (26); the elastic pin (25) is arranged on the side wall of the base (22) through a top screw and a spring, and one end of the elastic pin (25) away from the axis of the base (22) penetrates the outer wall of the base (22) and extends to the outer wall of the base (22); the annular groove (26) is arranged on the inner wall of the clamping seat (24); when the horizontal height of the elastic pin (25) is consistent with the horizontal height of the annular groove (26), the base (22) is clamped with the clamping seat (24) through the elastic pin (25) and the annular groove (26).

7. A marine anti-corrosion coating testing device according to claim 6, characterized in that: The magnetic attraction structure is an electromagnetic column (20), the electromagnetic column (20) is fixedly connected to the upper wall of the connector (19), the outer diameter of the electromagnetic column (20) is matched with the inner diameter of the connecting cavity (23), and the base (22) is made of a magnetically attractive material.

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