Corrosion resistance testing device for steel pipe

Abstract

The utility model relates to a steel pipe corrosion resistance testing device which comprises a mounting frame, a plurality of testing rooms are mounted at the lower end of the mounting frame, and each testing room comprises a top seat and a bottom seat; the upper end of the base is fixedly connected with a socket; the lower end of the top seat is fixedly connected with a corrugated cover, and a driving mechanism used for folding and unfolding the corrugated cover is arranged between the top seat and the base; the top seat is provided with an upper pressing plate which slides up and down in the corrugated cover, and a liquid spraying mechanism is mounted between the socket and the upper pressing plate; and a steam conveying pipe is mounted on the top seat. Technicians can simulate different working environments in different corrugated covers, so that the corrosion resistance of the steel pipe in different environments can be tested at the same time, the sample data is richer, and the testing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to steel pipe testing, in particular to a corrosion resistance testing device for steel pipes. Background Art

[0002] Corrosion-resistant steel pipes generally refer to steel pipes that can resist chemical erosion and corrosion in a specific environment. This property makes them very useful in many industrial applications, especially in industries such as chemical engineering, petroleum, natural gas, seawater desalination, sewage treatment, and food processing.

[0003] After the production of corrosion-resistant steel pipes is completed, the manufacturer needs to sample a batch of corrosion-resistant steel pipes for corrosion resistance testing to judge the quality of the corrosion-resistant steel pipes. However, the existing testing equipment can only test the corrosion resistance of steel pipes in a single environment and cannot test the corrosion resistance of steel pipes in different environments at the same time. The test samples are relatively single. Therefore, we need a testing device that can test the corrosion resistance of steel pipes in different environments at the same time. Summary of the Utility Model

[0004] The utility model provides a corrosion resistance testing device for steel pipes, which solves the above problems existing in the prior art during use.

[0005] The technical solution of the utility model is realized as follows: A corrosion resistance testing device for steel pipes includes a mounting frame, and a plurality of test chambers are installed at the lower end of the mounting frame. Each test chamber includes a top seat and a bottom seat;

[0006] A socket is fixedly connected to the upper end of the bottom seat;

[0007] A corrugated cover is fixedly connected to the lower end of the top seat, and a driving mechanism for retracting and extending the corrugated cover is arranged between the top seat and the bottom seat;

[0008] An upper pressing plate that slides up and down is arranged in the corrugated cover on the top seat, and a liquid spraying mechanism is installed between the socket and the upper pressing plate;

[0009] A steam delivery pipe is installed on the top seat.

[0010] Further, the driving mechanism includes a servo motor and a lead screw;

[0011] The servo motor is fixedly connected to the upper end of the top seat, the lead screw is connected between the top seat and the bottom seat, and the output shaft of the servo motor is connected to the lead screw;

[0012] A hard ring is fixedly connected to the lower end of the corrugated cover, and the hard ring is threadedly connected to the lead screw.

[0013] Further, a sliding rod is fixedly connected to the upper end of the upper pressing plate;

[0014] A connecting column is installed between the top seat and the mounting bracket. A sliding groove is formed in the connecting column. The upper end of the sliding rod is fixedly connected with a limiting plate. The sliding rod is slidably connected to the sliding groove through the limiting plate. A compression spring is connected between the limiting plate and the sliding groove. A through groove penetrating the top seat is formed at the lower end of the sliding groove.

[0015] Further, the liquid spraying mechanism includes an upper liquid spraying pipe, a lower liquid spraying pipe and a liquid outlet assembly;

[0016] The upper liquid spraying pipe is installed at the lower end of the upper pressing plate. The lower liquid spraying pipe is installed in the socket. The liquid outlet assembly is installed at the lower end of the base and is connected to the lower liquid spraying pipe;

[0017] An insertion pipe is integrally formed at the upper end of the lower liquid spraying pipe. A socket is formed at the lower end of the upper liquid spraying pipe. The insertion pipe is inserted into the socket;

[0018] A plurality of liquid spraying holes are formed in the pipe walls of the upper liquid spraying pipe and the lower liquid spraying pipe.

[0019] Further, the liquid outlet assembly includes a booster pump and a liquid storage tank;

[0020] The liquid storage tank is arranged below the base. A liquid delivery pipe penetrating the base is fixedly connected between the lower liquid spraying pipe and the liquid storage tank. The booster pump is installed on the liquid delivery pipe.

[0021] Further, an absorption sponge is sleeved on the lower end of the lower liquid spraying pipe.

[0022] Further, a sealing ring is fixedly connected to the inner side wall of the hard ring.

[0023] In summary, the beneficial effects of the present utility model are as follows:

[0024] Technicians can simulate different working environments in different corrugated covers, so as to test the corrosion resistance of steel pipes in different environments at the same time, making the sample data richer and improving the test efficiency;

[0025] The steam delivery pipe conveys gaseous water into the corrugated cover to simulate a humid working environment, so that the steel pipe corrosion resistance test device can test the corrosion resistance of the outer wall of the steel pipe in a humid environment. Description of the Drawings

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Schematic diagram of the overall structure of the present invention;

[0028] Figure 2 is Figure 1 Cross-sectional view of a test chamber in

[0029] Figure 3 is Figure 2 Local enlarged view at position A in

[0030] Figure 4 is Figure 2 Local enlarged view at position B in

[0031] Reference numerals in the figure: 11, mounting frame; 12, test chamber; 13, top seat; 14, base; 15, socket; 16, corrugated cover; 17, upper pressing plate; 18, steam delivery pipe; 19, connecting column; 20, sliding groove; 21, sliding rod; 22, through groove; 23, limiting plate; 24, servo motor; 25, lead screw; 26, hard ring; 27, upper liquid spraying pipe; 28, lower liquid spraying pipe; 29, insertion pipe; 30, socket; 31, liquid spraying hole; 32, booster pump; 33, liquid storage tank; 34, liquid delivery pipe; 35, absorption sponge; 36, sealing ring; 37, steel pipe; 38, compression spring. Specific embodiments

[0032] The following will combine the Figures 1-4 in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0033] Embodiment:

[0034] As Figures 1 to 4 shown, a steel pipe corrosion resistance testing device includes a mounting frame 11. A plurality of test chambers 12 are installed at the lower end of the mounting frame 11. The test chamber 12 includes a top seat 13 and a base 14. A socket 15 for placing a steel pipe is fixedly connected to the upper end of the base 14;

[0035] Furthermore, a bellows 16 is fixedly connected to the lower end of the top seat 13, and a driving mechanism for retracting and releasing the bellows 16 is provided between the top seat 13 and the base 14;

[0036] The top seat 13 is provided with an upper pressure plate 17 that slides up and down inside the corrugated cover 16, and a liquid spraying mechanism for spraying the inner wall of the steel pipe 37 is installed between the socket 15 and the upper pressure plate 17. In addition, a steam pipe 18 for conveying water vapor into the test room 12 is installed on the top seat 13, and the steam pipe 18 is externally connected to a steam delivery device and a valve (not shown in the figure).

[0037] The working principle of the utility model is as follows: the technician first retracts the bellows 16 upwards through the driving mechanism to expose the socket 15 and the upper pressing plate 17, then lifts the upper pressing plate 17 upwards to leave space for the installation of the steel pipe 37, then inserts the lower end of the steel pipe 37 into the socket 15, and moves the upper pressing plate 17 downwards so that the upper pressing plate 17 is pressed against the upper end of the steel pipe 37 to achieve the purpose of fixing the steel pipe 37;

[0038] After the steel pipe is fixed, the driving mechanism is used to unfold the bellows 16 downward until the bellows 16 completely covers the outside of the steel pipe 37, and then the liquid spraying mechanism sprays the test liquid on the inner wall of the steel pipe 37 until the test liquid is evenly distributed on the inner wall of the steel pipe 37;

[0039] Furthermore, the steel pipe corrosion resistance testing device can also test the corrosion resistance of the outer wall of the steel pipe 37. While the liquid spraying mechanism sprays the test liquid on the inner wall of the steel pipe 37, the steam pipe 18 can transport a certain amount of gaseous water into the bellows 16, thereby increasing the humidity of the internal environment of the bellows 16, thereby simulating the steel pipe 37 being in a humid working environment.

[0040] After the inner wall of the steel pipe 37 is evenly sprayed with the test liquid and the humidity in the corrugated cover 16 reaches the experimental requirements, the steel pipe 37 is left to stand for a period of time. Then the technician retracts the corrugated cover 16 upwards and takes out the steel pipe 37 to observe the corrosion conditions of the inner and outer walls thereof. Since the steel pipe corrosion resistance testing device is provided with a plurality of the test rooms 12, the technician can simultaneously test the corrosion conditions of each group of the steel pipes 37 under different humidity and the same test liquid applied to the inner wall (or the same humidity and different test liquids applied to the inner wall). The technician can also directly retract the corrugated cover 16 upwards to expose the steel pipe 37 to the air as a control group to ensure that the experimental data is more comprehensive and the test results are more accurate.

[0041] It should be noted here that since the steam delivery pipe 18 transports gaseous water, which has stable properties and is non-toxic and harmless to the human body, technicians can directly retract the corrugated cover 16 upward after the experiment without worrying that the gaseous water will damage the health of the technicians, thus further ensuring the safety of the experiment.

[0042] Among them, the driving mechanism includes a servo motor 24 and a lead screw 25. The specific structure of the driving mechanism is as follows: the servo motor 24 is fixedly connected to the upper end of the top seat 13, the lead screw 25 is connected between the top seat 13 and the base 14, the output shaft of the servo motor 24 is connected to the lead screw 25, the lower end of the corrugated cover 16 is fixedly connected with a hard ring 26, the hard ring 26 is threadedly connected to the lead screw 25, and a sealing ring 36 is fixedly connected to the inner side wall of the hard ring 26. A limiting rod symmetric to the lead screw 25 is arranged between the top seat 13 and the base 14, and the hard ring 26 is slidably connected to the limiting rod. By means of the limiting rod, it is ensured that the hard ring 26 can only move up and down on the lead screw 25.

[0043] Through the above structure, the corrugated cover 16 is driven to be retracted and deployed. After the technician fixes the steel pipe 37, the servo motor 24 drives the corrugated cover 16 to unfold downward through the lead screw 25, and finally the hard ring 26 abuts against the base 14, thereby isolating the steel pipe 37 from the outside world, and the sealing ring 36 can effectively prevent the water vapor inside the corrugated cover 16 from communicating with the outside air to ensure the accuracy of the experimental results;

[0044] During the air group control experiment or in the idle state, the servo motor 24 drives the hard ring 26 to be retracted upward through the lead screw 25, so that the corrugated cover 16 is folded upward and retracted under the lower end of the top seat 13.

[0045] The upper end of the upper pressing plate 17 is fixedly connected with a sliding rod 21. An adapter column 19 is installed between the top seat 13 and the mounting frame 11. A sliding groove 20 is opened in the adapter column 19. The upper end of the sliding rod 21 is fixedly connected with a limiting plate 23. The sliding rod 21 is slidably connected to the sliding groove 20 through the limiting plate 23. A compression spring 38 is connected between the limiting plate 23 and the sliding groove 20. A through groove 22 penetrating the top seat 13 is opened at the lower end of the sliding groove 20.

[0046] Through the above structure, the upper pressing plate 17 can move up and down. When placing the steel pipe 37, the upper pressing plate 17 can be moved upward to provide enough installation space for the technician to fix the lower end of the steel pipe 37 in the socket 15;

[0047] After the technician inserts the lower end of the steel pipe 37 into the socket 15, release the upper pressure plate 17 so that the upper pressure plate 17 can press on the upper end of the steel pipe 37 under the action of the compression spring 38. Additionally, a sealing gasket or the like for contacting the steel pipe 37 can be added to the upper pressure plate 17 and the socket 15 as needed. While fixing the steel pipe 37, it can prevent the test liquid sprayed by the liquid spraying mechanism from splashing outside the steel pipe 37, dissolving in water vapor, polluting the test environment inside the corrugated cover 16, and affecting the accuracy of the test results.

[0048] The liquid spraying mechanism includes an upper liquid spraying pipe 27, a lower liquid spraying pipe 28, and a liquid outlet assembly. The specific structure of the liquid spraying mechanism is as follows: The upper liquid spraying pipe 27 is installed at the lower end of the upper pressure plate 17, the lower liquid spraying pipe 28 is installed in the socket 15, the liquid outlet assembly is installed at the lower end of the base 14 and is connected to the lower liquid spraying pipe 28. An insertion pipe 29 is integrally formed at the upper end of the lower liquid spraying pipe 28, a socket 30 is opened at the lower end of the upper liquid spraying pipe 27, the insertion pipe 29 is inserted into the socket 30, and a plurality of liquid spraying holes 31 are opened on the pipe walls of the upper liquid spraying pipe 27 and the lower liquid spraying pipe 28.

[0049] The liquid outlet assembly includes a booster pump 32 and a liquid storage tank 33. The liquid storage tank 33 is arranged below the base 14. A liquid infusion pipe 34 passing through the base 14 is fixedly connected between the lower liquid spraying pipe 28 and the liquid storage tank 33, and the booster pump 32 is installed on the liquid infusion pipe 34.

[0050] The working principle of the liquid spraying mechanism is as follows: When the technician inserts the lower end of the steel pipe 37 into the socket 15, the lower liquid spraying pipe 28 extends into the steel pipe 37. When the upper pressure plate 17 moves downward until it presses on the upper end of the steel pipe 37, the lower liquid spraying pipe 28 is spliced with the upper liquid spraying pipe 27 through the insertion pipe 29.

[0051] Subsequently, the technician drives the corrugated cover 16 to move downward until the steel pipe 37 is completely covered by the corrugated cover 16. Then, the booster pump 32 pumps the test liquid in the liquid storage tank 33 into the lower liquid spraying pipe 28 and the upper liquid spraying pipe 27, and the test liquid is evenly sprayed onto the inner wall of the steel pipe 37 through the liquid spraying holes 31 opened on the pipe walls of the lower liquid spraying pipe 28 and the upper liquid spraying pipe 27.

[0052] Moreover, an absorption sponge 35 is sleeved on the lower end of the lower liquid spraying pipe 28 for absorbing the test liquid falling on the inner wall of the steel pipe 37, so as to prevent the test liquid from accumulating in the socket 15. When cleaning work is carried out after the test, the absorption sponge 35 can be taken out, so as to prevent the test liquid remaining from the previous experiment from remaining in the socket 15 at the beginning of a new round of experiment, thereby ensuring the experimental accuracy.

[0053] It should be noted that the terms used in the present invention, such as "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the protection scope of the present invention.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A steel pipe corrosion resistance testing device, comprising a mounting frame (11), characterized in that: A plurality of test rooms (12) are installed at the lower end of the mounting frame (11), and the test rooms (12) include a top seat (13) and a base (14); The upper end of the base (14) is fixedly connected to a socket (15); The lower end of the top seat (13) is fixedly connected to a bellows cover (16), and a driving mechanism for retracting and releasing the bellows cover (16) is provided between the top seat (13) and the base (14); The top seat (13) is provided with an upper pressing plate (17) which slides up and down inside the corrugated cover (16), and a liquid spraying mechanism is installed between the socket (15) and the upper pressing plate (17); A steam delivery pipe (18) is installed on the top seat (13).

2. A steel pipe corrosion resistance testing device according to claim 1, characterized in that: The driving mechanism comprises a servo motor (24) and a screw rod (25); The servo motor (24) is fixedly connected to the upper end of the top seat (13), the screw rod (25) is connected between the top seat (13) and the base (14), and the output shaft of the servo motor (24) is connected to the screw rod (25); A hard ring (26) is fixedly connected to the lower end of the bellows (16), and the hard ring (26) is threadedly connected to the screw rod (25).

3. A steel pipe corrosion resistance testing device according to claim 1, characterized in that: The upper end of the upper pressing plate (17) is fixedly connected to a sliding rod (21); A connecting column (19) is installed between the top seat (13) and the mounting frame (11), a sliding groove (20) is provided in the connecting column (19), the upper end of the sliding rod (21) is fixedly connected to a limit plate (23), a compression spring (38) is connected between the limit plate (23) and the sliding groove (20), the sliding rod (21) is slidably connected to the limit plate (23) in the sliding groove (20) to move up and down, and a through groove (22) is provided at the lower end of the sliding groove (20) and passes through the top seat (13).

4. A steel pipe corrosion resistance testing device according to claim 1, characterized in that: The liquid spraying mechanism comprises an upper liquid spraying pipe (27), a lower liquid spraying pipe (28) and a liquid outlet assembly; The upper liquid spray pipe (27) is installed at the lower end of the upper pressure plate (17), the lower liquid spray pipe (28) is installed in the socket (15), and the liquid outlet assembly is installed at the lower end of the base (14) and connected to the lower liquid spray pipe (28); The upper end of the lower liquid spraying pipe (28) is integrally formed with an insert pipe (29), the lower end of the upper liquid spraying pipe (27) is provided with an insert opening (30), and the insert pipe (29) is inserted into the insert opening (30); A plurality of liquid spray holes (31) are provided on the walls of the upper liquid spray pipe (27) and the lower liquid spray pipe (28).

5. A steel pipe corrosion resistance testing device according to claim 4, characterized in that: The liquid outlet assembly comprises a booster pump (32) and a liquid storage tank (33); The liquid storage tank (33) is arranged below the base (14), a liquid infusion pipe (34) penetrating the base (14) is fixedly connected between the lower liquid spray pipe (28) and the liquid storage tank (33), and the booster pump (32) is installed on the liquid infusion pipe (34).

6. A steel pipe corrosion resistance testing device according to claim 4, characterized in that: The lower end of the lower liquid spraying pipe (28) is sleeved with an absorption sponge (35).

7. A steel pipe corrosion resistance testing device according to claim 2, characterized in that: A sealing ring (36) is fixedly connected to the inner side wall of the hard ring (26).

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