An experimental device for simulating metal corrosion in soil

Abstract

The present invention provides an experimental device for simulating metal corrosion in soil. The device includes a mounting frame, a first test frame and a second test frame mounted on the mounting frame. Among them, the first test frame includes a measurement frame, a movable block and a movable mechanism. The movable mechanism is arranged on the measurement frame and is used to drive the movable block to move up and down. The movable block is also controlled by a moving mechanism on the mounting frame to move left and right. A first metal plate is arranged on the measurement frame. The second test frame includes a corrosion frame, a pressing mechanism and a membrane barrier arranged in the corrosion frame. The opening of the corrosion frame is connected to the top of the measurement frame. The pressing mechanism is used to press the first metal plate, and a corrosion liquid is arranged in the corrosion frame. The effect of the simulation experiment of the present invention is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal corrosion testing, and particularly relates to an experimental device for simulating metal corrosion in soil. Background Art

[0002] Sulfate-Reducing Bacteria (SRB for short) is a unique group of prokaryotic physiologies. It is a group of strict anaerobic bacteria with various morphological characteristics that can carry out sulfate reduction by using sulfate as the electron acceptor of organic matter through dissimilation. Through research, the corrosion of steel in soil is mainly caused by sulfate-reducing bacteria. However, there is no prior art on how to conduct simulation experiments on the corrosion of metals (steel) in soil.

[0003] Therefore, it is necessary to design an experimental device for simulating metal corrosion in soil to solve the above technical problems. Summary of the Invention

[0004] In view of the above technical problems, the present invention provides an experimental device for simulating metal corrosion in soil. The device includes a mounting rack, a first test rack and a second test rack mounted on the mounting rack. Among them,

[0005] The first test rack includes a measurement frame, a movable block and a movable mechanism. Among them, the movable mechanism is arranged on the measurement frame and is used to drive the movable block to move up and down; the movable block is also controlled by a moving mechanism on the mounting rack to move left and right, and a first metal plate is arranged on the measurement frame;

[0006] The second test rack includes a corrosion frame, an extrusion mechanism and a diaphragm arranged in the corrosion frame. Among them, the opening of the corrosion frame is connected to the top of the measurement frame, the extrusion mechanism is used to extrude the first metal plate, and a corrosion liquid is arranged in the corrosion frame.

[0007] Further, the mounting rack includes a frame and a support frame. Among them,

[0008] The support frame includes a support plate and a support rod connected to the bottom of the support plate. The bottom of the support rod is fixed to the bottom inside the frame, and the moving mechanism is arranged on the support plate.

[0009] Further, the measurement frame includes a bottom frame and a frame top. Among them,

[0010] The opening of the bottom frame faces upward, and the opening of the frame top faces downward;

[0011] The bottom of the bottom frame is connected to the frame, and one side wall of the bottom frame is connected to the support plate;

[0012] The top of the frame top is connected to the frame, and an inner hole is opened on the frame top, and the first metal plate is installed in the inner hole.

[0013] Furthermore,

[0014] The movable mechanism includes a connecting plate, a first hydraulic cylinder, and four movable plates. Among them, the first hydraulic cylinder is installed at the bottom inside the bottom frame, the connecting plate is connected to the output end of the first hydraulic cylinder, and the four movable plates are connected to the four side walls of the connecting plate;

[0015] The bottom frame has four side walls, and each side wall is provided with an inner groove, and a pressure sensor is installed in each inner groove;

[0016] The bottoms of the four movable plates are respectively inserted into the four inner grooves, and a spring is provided at the bottom of each movable plate;

[0017] The bottom of the movable block can contact the bottoms of the four movable plates.

[0018] Furthermore, the top of the movable block can contact the bottom of the top of the frame. Among them,

[0019] A first notch is provided on the upper surface of the movable block, and the first notch is filled with first sandy soil, and the first notch is located directly below the first metal plate;

[0020] The other end of the movable block is connected to the moving mechanism.

[0021] Furthermore, a second notch is further provided on the upper surface of the movable block, the second notch is filled with second sandy soil, the second notch is located inside the mounting frame, and a second metal plate is further provided on the movable block, and the second metal plate is located above the second notch.

[0022] Furthermore, the moving mechanism includes a mounting seat and a second hydraulic cylinder. Among them,

[0023] The mounting seat is fixed on the support plate, the second hydraulic cylinder is installed on the mounting seat, and the output end of the second hydraulic cylinder is connected to the movable block.

[0024] Furthermore, the film divides the interior of the corrosion frame into a first chamber and a second chamber. Among them,

[0025] The second chamber is located below the first chamber and is located above the first metal plate; the second chamber is filled with corrosive liquid;

[0026] The extrusion mechanism is arranged in the first chamber. Among them,

[0027] The extrusion mechanism includes a third hydraulic cylinder. The third hydraulic cylinder is located in the first chamber and is connected to the top inside the corrosion frame. An extrusion plate is provided at the bottom of the third hydraulic cylinder, and a heating wire is provided inside the extrusion plate.

[0028] Further, a material discharge port is provided on the side wall of the corrosion frame. The material discharge port communicates with the second chamber and is used for discharging the corrosion liquid. A material discharge cover is provided on the material discharge port.

[0029] Further, a connecting pipe is provided on the side wall of the corrosion frame. One end of the connecting pipe communicates with the second chamber, and the other end of the connecting pipe penetrates out of the corrosion frame and is connected with a pump body. The pump body is fixed on the top of the installation frame, and the pump body communicates with a liquid storage tank on the frame through a pipeline.

[0030] The present invention provides an experimental device for simulating metal corrosion in soil. Through the first metal plate, it can effectively simulate how much the bearing capacity of the first metal is after the metal plate is corroded.

[0031] Other features and advantages of the present invention will be described in the following specification, and part of them will become obvious from the specification or be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order 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 the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0033] Figure 1 Shows a schematic structural diagram of an experimental device for simulating metal corrosion in soil according to an embodiment of the present invention.

[0034] Figure 2 Shows according to the present invention Figure 1 Schematic diagram of the structure at position A.

[0035] Figure 3 Shows according to the present invention Figure 1 Schematic diagram of the structure at position B. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. 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.

[0037] AsFigures 1-3 As shown, the present invention provides an experimental device for simulating metal corrosion in soil. The device includes a mounting frame 1, a first test frame and a second test frame mounted on the mounting frame 1. Among them,

[0038] The first test frame includes a measurement frame 2, a movable block 3 and a movable mechanism. Among them, the movable mechanism is arranged on the measurement frame 2 and is used to drive the movable block 3 to move up and down; the movable block 3 is also controlled by a moving mechanism on the mounting frame 1 to move left and right. A first metal plate 4 is arranged on the measurement frame 2.

[0039] The second test frame includes a corrosion frame 5, an extrusion mechanism and a diaphragm 31 arranged in the corrosion frame 5. Among them, the opening of the corrosion frame 5 is connected to the top of the measurement frame 2. The extrusion mechanism is used to extrude the first metal plate 4, and a corrosion liquid 6 is arranged in the corrosion frame 5.

[0040] A detailed description will be given below.

[0041] In this embodiment, the mounting frame 1 includes a frame 7 and a support frame. Among them,

[0042] The support frame includes a support plate 8 and a support rod 9 connected to the bottom of the support plate 8. The bottom of the support rod 9 is fixed to the bottom inside the frame 7, and the moving mechanism is arranged on the support plate 8. Among them, the moving mechanism includes a mounting seat 20 and a second hydraulic cylinder 21. Among them,

[0043] The mounting seat 20 is fixed on the support plate 8, the second hydraulic cylinder 21 is mounted on the mounting seat 20, and the output end of the second hydraulic cylinder 21 is connected to the movable block 3. Therefore, through the moving mechanism, the movable block 3 can be controlled to move left and right. Since the movable mechanism can also drive the movable block 3 to move up and down, a chute plate 33 can be arranged at the output end of the second hydraulic cylinder 21. A chute is arranged on the chute plate 33. The movable block 3 can move in the up and down direction through a sliding rod (the sliding rod is installed in the chute) installed on the movable block 3. Thus, the movable block 3 can move up and down under the drive of the moving mechanism.

[0044] In this embodiment, the measurement frame 2 includes a bottom frame 10 and a frame top 11. Among them,

[0045] The opening of the bottom frame 10 faces upward, and the opening of the frame top 11 faces downward;

[0046] The bottom of the bottom frame 10 is connected to the frame 7, and one side wall of the bottom frame 10 is connected to the support plate 8;

[0047] The top of the frame top 11 is connected to the frame 7. An inner hole is opened on the frame top 11, and the first metal plate 4 is installed in the inner hole. The first metal plate 4 can be used as a simulated corrosion sample of a conventional metal plate.

[0048] In this embodiment, the top of the movable block 3 can contact the bottom of the frame top 11, where

[0049] a first notch is provided on the upper surface of the movable block 3, and the first notch is filled with first sandy soil 18, and the first notch is located directly below the first metal plate 4; the other end of the movable block 3 is connected to a moving mechanism.

[0050] In this embodiment, the film stopper 31 divides the interior of the corrosion frame 5 into a first chamber 22 and a second chamber 23, where

[0051] the second chamber 23 is located below the first chamber 22 and above the first metal plate 4; a corrosion liquid 6 is filled in the second chamber 23. Since in the soil, the main metal-corroding agent is sulfate-reducing bacteria, the corrosion liquid 6 in this embodiment can be cultured from sulfate-reducing bacteria. As for how to culture it, it is not within the protection scope of this embodiment, as long as the corrosion liquid 6 rich in a set amount of sulfate-reducing bacteria can be obtained.

[0052] The corrosion liquid 6 rich in a large amount of sulfate-reducing bacteria can accelerate the corrosion rate of metal objects. That is, in this embodiment, when the first metal plate 4 is in the inner hole of the frame top 11, it can contact the corrosion liquid 6 in the second chamber 23 and thus be corroded under the action of the corrosion liquid 6.

[0053] In addition, in this embodiment, a communication pipe 27 is provided on the side wall of the corrosion frame 5. One end of the communication pipe 27 communicates with the second chamber 23, and the other end of the communication pipe 27 passes through the corrosion frame 5 and is connected to a pump body 28. The pump body 28 is fixed on the top of the installation frame 7, and the pump body 28 is communicated with a liquid storage tank 29 on the frame 7 through a pipeline.

[0054] In this embodiment, the extrusion mechanism is arranged in the first chamber 22, where

[0055] the extrusion mechanism includes a third hydraulic cylinder 24. The third hydraulic cylinder 24 is located in the first chamber 22 and connected to the top inside the corrosion frame 5. An extrusion plate 25 is provided at the bottom of the third hydraulic cylinder 24, and a heating wire is provided inside the extrusion plate 25. After the specified time for the first time, the corrosion liquid 6 in the second chamber 23 can be pumped out through the pump body 28.

[0056] After the etching solution 6 is pumped out, by controlling the third hydraulic cylinder 24, the pressing plate 25 moves downward, and the heating wire in the pressing plate 25 is heated (the pressing plate 25 is made of metal material with better heat transfer effect), so that the pressing plate 25 is heated and can pass through the blocking film 31 (the blocking film 31 is made of thin film material), thereby pressing the first metal plate 4. Among them, the blocking film 31 only plays a role in protecting the pressing plate 25 from being corroded by the gas of the etching solution 6 after the specified time of the first time (the etching solution 6 in the second chamber 23 will evaporate within a certain time) (because the specified time of the first time is relatively long, so it is necessary to protect the pressing plate 2).

[0057] In this embodiment, the movable mechanism includes a connecting plate 12, a first hydraulic cylinder 13 and four movable plates 14. Among them, the first hydraulic cylinder 13 is installed at the bottom inside the bottom frame 10 (a buffer pipe 34 is provided at the bottom inside the bottom frame 10, a pressure sensor is provided in the buffer pipe 34, a spring is provided at the bottom of the first hydraulic cylinder 13, and the bottom of the first hydraulic cylinder 13 is inserted into the buffer pipe 34), the connecting plate 12 is connected to the output end of the first hydraulic cylinder 13, and the four movable plates 14 are connected to the four side walls of the connecting plate 12.

[0058] The bottom frame 10 has four side walls, and an inner groove 15 is opened on each side wall. A pressure sensor 16 is installed in each inner groove 15; the bottoms of the four movable plates 14 are respectively inserted into the four inner grooves 15, and a spring 17 is provided at the bottom of each movable plate 14; the bottom of the movable block 3 can contact the bottoms of the four movable plates 14. Therefore, when the first metal plate 4 is pressed, through five pressure sensors, the force when the first metal plate 4 is pressed can be obtained. If at this time, the first metal plate 4 is broken (after being broken, the first metal plate 4 broken into two sections will be pressed into the first sand 18), then according to the thickness of the first metal plate 4 recorded in advance, it can be known how much is the maximum pressure that the first metal plate 4 can withstand before being broken after the first corrosion for the specified time, which is convenient for subsequent targeted design of the first measuring plate 4 (as for how to design, it is not within the protection scope of the present invention and will not be elaborated again).

[0059] In this embodiment, a second notch is further provided on the upper surface of the movable block 3. The second notch is filled with second sand 19. The second notch is located inside the mounting frame 1. A second metal plate 30 is further provided on the movable block 3, and the second metal plate 30 is located above the second notch.

[0060] After the first metal plate 4 is broken, by starting the first hydraulic cylinder 13, the entire movable block 3 descends under the action of gravity, and the first metal plate 4 disengages from the inner hole of the frame top 11. Then, the second hydraulic cylinder 21 is started so that the entire movable block 3 can move to the left until the second metal plate 30 aligns with the inner hole of the frame top 11. Then, the first hydraulic cylinder 13 is started so that after the second metal plate 30 is inserted into the inner hole of the frame top 11, the pump body 28 is controlled to re-inject the corrosive liquid 6 in the liquid storage tank 29 into the second chamber 23. Then, the corrosion experiment of the first metal plate 4 is repeated. Since a part of the sulfate-reducing bacteria in the corrosive liquid 6 has been consumed, after the specified time for the second time (the specified time for the second time is greater than the specified time for the first time), the above corrosion experiment of the first metal plate 4 is repeated. Thus, it is possible to obtain the maximum pressure that the second metal plate 30 can withstand before being broken after the specified time of the second corrosion at the thickness of the second metal plate 30. It should be noted that by knowing the maximum pressure that the second metal plate 30 can withstand before being broken, it is possible to estimate the bearing capacity of the double-layer metal plate buried underground after being corroded by sulfate-reducing bacteria in the soil.

[0061] In addition, in this embodiment, a material discharge port 26 is provided on the side wall of the corrosion frame 5. The material discharge port 26 is communicated with the second chamber 23. The material discharge port 26 is used for discharging the corrosive liquid 6, and a material discharge cover 32 is provided on the material discharge port 26. Through the material discharge port 26, the corrosive liquid 6 can be injected into the second chamber 23.

[0062] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to form equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as the content does not depart from the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An experimental device for simulating metal corrosion in soil, the device comprising a mounting frame (1), a first test frame and a second test frame mounted on the mounting frame (1), wherein, The first test frame includes a measuring frame (2), a movable block (3) and a moving mechanism. The moving mechanism is arranged on the measuring frame (2) and is used to drive the movable block (3) to move up and down. The movable block (3) is also controlled to move left and right by a moving mechanism on the mounting frame (1). A first metal plate (4) is arranged on the measuring frame (2); The second test frame includes a corrosion frame (5), a pressing mechanism and a diaphragm (31) arranged in the corrosion frame (5). The opening of the corrosion frame (5) is connected to the top of the measuring frame (2). The pressing mechanism is used to press the first metal plate (4). A corrosion liquid (6) is arranged in the corrosion frame (5); The measuring frame (2) includes a bottom frame (10) and a frame top (11). The opening of the bottom frame (10) faces upward, and the opening of the frame top (11) faces downward. The bottom of the bottom frame (10) is connected to a frame (7), and one side wall of the bottom frame (10) is connected to a support plate (8). The top of the frame top (11) is connected to the frame (7). An inner hole is provided on the frame top (11), and the first metal plate (4) is installed in the inner hole; The top of the movable block (3) can contact the bottom of the frame top (11). The upper surface of the movable block (3) is provided with a first notch, and the first notch is filled with first sand (18). The first notch is located directly below the first metal plate (4). The other end of the movable block (3) is connected to the moving mechanism; The upper surface of the movable block (3) is also provided with a second notch, and the second notch is filled with second sand (19). The second notch is located inside the mounting frame (1). A second metal plate (30) is also arranged on the movable block (3), and the second metal plate (30) is located above the second notch; The diaphragm (31) divides the interior of the corrosion frame (5) into a first chamber (22) and a second chamber (23). The second chamber (23) is located below the first chamber (22) and above the first metal plate (4). The corrosion liquid (6) is filled in the second chamber (23). The pressing mechanism is arranged in the first chamber (22). The pressing mechanism includes a third hydraulic cylinder (24). The third hydraulic cylinder (24) is located in the first chamber (22) and is connected to the top inside the corrosion frame (5). A pressing plate (25) is arranged at the bottom of the third hydraulic cylinder (24), and a heating wire is arranged inside the pressing plate (25); 2. The experimental device for simulating metal corrosion in soil according to claim 1, wherein, The mounting frame (1) includes a support frame and the frame (7), wherein, The support frame includes the support plate (8) and a support rod (9) connected to the bottom of the support plate (8). The bottom of the support rod (9) is fixed to the bottom inside the frame (7). The moving mechanism is arranged on the support plate (8); 3. An experimental device for simulating metal corrosion in soil according to claim 2, wherein, The movable mechanism includes a connecting plate (12), a first hydraulic cylinder (13), and four movable plates (14). Among them, the first hydraulic cylinder (13) is installed at the bottom inside the bottom frame (10), the connecting plate (12) is connected to the output end of the first hydraulic cylinder (13), and the four movable plates (14) are connected to the four side walls of the connecting plate (12). The bottom frame (10) has four side walls, and an inner groove (15) is formed on each side wall. A pressure sensor (16) is installed in each inner groove (15). The bottoms of the four movable plates (14) are respectively inserted into the four inner grooves (15), and a spring (17) is provided at the bottom of each movable plate (14). The bottom of the movable block (3) can contact the bottoms of the four movable plates (14).

4. An experimental device for simulating metal corrosion in soil according to claim 3, wherein, The moving mechanism includes a mounting seat (20) and a second hydraulic cylinder (21). Among them, The mounting seat (20) is fixed on the support plate (8), the second hydraulic cylinder (21) is installed on the mounting seat (20), and the output end of the second hydraulic cylinder (21) is connected to the movable block (3).

5. An experimental device for simulating metal corrosion in soil according to claim 4, wherein, A material discharging port (26) is provided on the side wall of the corrosion box (5). The material discharging port (26) is communicated with the second chamber (23). The material discharging port (26) is used for discharging the corrosion liquid (6), and a material discharging cover is provided on the material discharging port (26).

6. An experimental device for simulating metal corrosion in soil according to claim 5, wherein, A connecting pipe (27) is provided on the side wall of the corrosion box (5). One end of the connecting pipe (27) communicates with the second chamber (23), the other end of the connecting pipe (27) penetrates out of the corrosion box (5) and is connected with a pump body (28). The pump body (28) is fixed on the top of the mounting frame (7), and the pump body (28) is communicated with the liquid storage tank (29) on the frame (7) through a pipeline.

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