Multi-film corrosion inhibitor diffusion experiment device

Abstract

The invention relates to the field of chemical experiments, and particularly discloses a multi-film corrosion inhibitor diffusion experiment device which comprises a connecting pipe and a breather pipe, a supporting assembly matched with a pipeline is arranged on the connecting pipe, and an expansion assembly communicated with the breather pipe is arranged on the supporting assembly. The expansion assembly is in contact with the inner wall of the pipeline to form a sealed experiment environment, and an adjusting assembly used for adjusting the supporting assembly is arranged on the supporting assembly. According to the invention, the device can be controlled and adjusted, the state switching of the device is realized, the diffusion experiment of the corrosion inhibitor in various different states is realized, the control contrast experiment is facilitated, the diffusion experiment of the corrosion inhibitor by the device is facilitated, multiple groups of experiment data can be obtained, the experiment result is enriched, and the establishment of an analysis model of the corrosion inhibitor is facilitated; the method is beneficial to analysis of corrosion inhibitor diffusion, the certainty of experimental data is improved, and the accuracy of the experimental data is improved, so that the research quality of a corrosion inhibitor diffusion experiment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical experiments, in particular to a multi-film layer corrosion inhibitor diffusion experimental device. Background Art

[0002] A corrosion inhibitor is a chemical substance used to prevent metal corrosion. A multi-layer corrosion inhibitor refers to a layer or layers of protective film formed on the metal surface by chemical or physical methods to prevent metal corrosion. The protective film is a composite structure composed of multiple functional layers. Each layer has different components and properties, which work together to improve the corrosion resistance of metal materials. Selecting a suitable multi-layer corrosion inhibitor is crucial to ensuring the long-term durability of metal products. Therefore, researchers will use experimental equipment to study corrosion inhibitors.

[0003] In the existing patent CN118376539A, a device and method for testing the diffusion coefficient of corrosion inhibitors in a high temperature environment are disclosed. The diffusion coefficient testing device includes a corrosion inhibitor solution chamber, a corrosion inhibitor diffusion chamber and a temperature control device; the corrosion inhibitor diffusion chamber is connected to the corrosion inhibitor solution chamber; a drain valve is provided at the bottom of the corrosion inhibitor solution chamber, and a liquid inlet valve, an air inlet valve I and a pressure gauge I are provided on the upper part of the side wall; an air inlet valve II and a pressure gauge II are provided on the top of the corrosion inhibitor diffusion chamber, and a number of sampling valves are provided on the side wall; the temperature control device realizes heating and temperature control of the corrosion inhibitor solution chamber and the corrosion inhibitor diffusion chamber. The present invention can calculate the corrosion inhibitor diffusion coefficient under high temperature and high pressure conditions by testing the concentration of the corrosion inhibitor solution at different times and different positions in the corrosion inhibitor diffusion chamber in combination with Fick's first law. The present invention solves the problem that the existing diffusion coefficient testing method cannot test the corrosion inhibitor diffusion coefficient under high temperature and high pressure environments, and the experimental equipment and operation are simple, convenient and fast.

[0004] Regarding the diffusion of corrosion inhibitors on the inner wall of the pipeline, in the above structure, the diffusion coefficient of the corrosion inhibitor can be experimented on. However, when conducting the diffusion experiment of the corrosion inhibitor on the inner wall of the pipeline, it is impossible to realize the different diffusion degrees of the corrosion inhibitor under various conditions, which is not conducive to the control of the experimental device, the diffusion experiment of the corrosion inhibitor by the device, and the acquisition of multiple sets of experimental data, resulting in a lack of experimental results and difficulty in establishing an analytical model for the corrosion inhibitor. It is not conducive to the analysis of the diffusion of the corrosion inhibitor, increases the uncertainty of the experimental data, reduces the accuracy of the experimental data, and thus reduces the research quality of the diffusion experiment of the corrosion inhibitor.

[0005] Therefore, how to provide a multi-layer corrosion inhibitor diffusion experimental device is a problem that those skilled in the art urgently need to solve. Summary of the Invention

[0006] One purpose of the present invention is to propose a multi-film corrosion inhibitor diffusion experimental device. The multi-film corrosion inhibitor diffusion experimental device described in the present invention includes a connecting pipe and a vent pipe. The connecting pipe is provided with a support component adapted to the pipeline, the support component is provided with an expansion component connected to the vent pipe, the expansion component contacts the inner wall of the pipeline to form a sealed experimental environment, the support component is provided with an adjustment component for adjusting the support component, the support component is provided with an air intake component connected to the expansion component, the support component is provided with a pushing component, and the pushing component is provided with a A distance-adjusting component is provided, a connecting component is provided between the distance-adjusting component and the expansion component, a sampling component is provided on the distance-adjusting component, and a clamping component is provided between the sampling component and the distance-adjusting component; wherein, when the adjusting component adjusts the supporting component, a diffusion experiment of the liquid level of the corrosion inhibitor at different heights from the sampling component is realized; when the air intake component is connected to the sealed experimental environment, a diffusion experiment of the corrosion inhibitor is realized under high pressure; when the connecting component connects the expansion component with the distance-adjusting component, a diffusion experiment of the corrosion inhibitor is realized at different distances between the sampling components.

[0007] Preferably, the support assembly includes an outer liquid inlet tube arranged on the connecting tube, an inner liquid inlet tube is slidably arranged inside the outer liquid inlet tube, a liquid outlet is provided on the inner liquid inlet tube, and an annular support plate is provided on both the outer liquid inlet tube and the inner liquid inlet tube.

[0008] Preferably, the adjustment component includes an adjustment motor arranged on the liquid inlet outer tube, the liquid inlet inner tube is provided with an adjustment spur rack passing through the liquid inlet outer tube, and the output shaft of the adjustment motor is connected to an adjustment gear meshing with the adjustment spur rack.

[0009] Preferably, the expansion assembly includes a connecting block 1, an air supply pipe 1 is provided on the connecting block 1, an electromagnetic valve 1 is provided on the air supply pipe 1, an expansion air bag connected to the air supply pipe 1 is provided on the annular support plate, a connecting pipe is provided on the connecting block 1, and the two connecting blocks 1 are connected through the connecting pipe.

[0010] Preferably, the air intake assembly includes a second connecting block arranged on the connecting pipe, an air intake pipe is arranged on the second connecting block, an air intake nozzle is arranged on the air intake pipe, and a second solenoid valve is installed on the air intake pipe.

[0011] Preferably, the pushing assembly includes an electric push rod 1 installed on the liquid inlet outer tube, the output end of the electric push rod 1 is provided with a pushing rod, and the pushing rod is provided with a connecting plate.

[0012] Preferably, the distance adjustment component includes a sliding block arranged on the connecting plate, a plurality of evenly distributed mounting plates are arranged on the sliding block, an adjusting airbag is arranged on the mounting plate, the mounting plates correspond to the adjusting airbags one by one and are alternately connected, and the first adjusting airbag is connected to the connecting plate.

[0013] Preferably, the connecting component includes a connecting block three arranged on the connecting pipe, an air supply pipe two is arranged on the connecting block three, an air distribution pipe connected to the regulating airbag is arranged on the air distribution pipe, and an electromagnetic valve three is installed on the air distribution pipe.

[0014] Preferably, the sampling assembly includes a sampling tube arranged on the mounting plate, the sampling tube is provided with a sampling nozzle that contacts the inner wall of the pipeline, an electric push rod 2 is installed in the mounting plate, and the output end of the electric push rod 2 is provided with a sampling piston that is compatible with the sampling tube.

[0015] Preferably, the clamping assembly includes a clamping outer rod hinged on the sampling tube, a clamping inner rod is inserted into the clamping outer rod, a stopper is provided on the clamping inner rod, a clamping spring is provided between the stopper and the clamping outer rod and is sleeved on the outer ring of the clamping inner rod, a clamping hook is hinged on the stopper, and a buckle adapted to the clamping hook is provided on the mounting plate.

[0016] The beneficial effects of the present invention are as follows:

[0017] When the corrosion inhibitor is diffused, the device is passed through the pipeline so that the two support assemblies are located on both sides of the experimental position inside the pipeline. When the diffusion experiment is carried out at different heights between the liquid level of the corrosion inhibitor and the sampling assembly, the adjustment assembly is started, and the adjustment assembly drives the support assembly to move so that the support assemblies are close to or away from each other, thereby adjusting the distance between a support assembly and the sampling assembly. Multiple groups of pipelines are taken to form a comparative experiment. The ventilation pipe is connected to the inflation device to force the inflation device to inflate the expansion assembly, forcing the expansion assembly to expand until the expansion assembly expands to abut against the inner wall of the pipeline to form a sealed experimental environment. The pipeline and the device are placed vertically, and the pushing assembly is started to force the pushing assembly to push the expansion assembly. The component drives the distance adjustment component and the connecting component to move synchronously until the sampling component contacts the inner wall of the pipeline, closes the expansion component and the air inlet component, and connects with the corrosion inhibitor adding device through the connecting pipe. The corrosion inhibitor adding device forces the corrosion inhibitor into the sealed experimental environment through the connecting pipe and the support component until the corrosion inhibitor is located in the experimental position in the pipeline. After a period of time, the corrosion inhibitor will diffuse along the inner wall of the pipeline until each sampling component obtains a sample. After the experiment is completed, the device is withdrawn from the pipeline, and the sampling component is removed using the clamping component. The concentration of the corrosion inhibitor in each sampling component of each group of experiments is detected and analyzed using a UV-visible spectrophotometer to achieve the distance between the liquid level of the corrosion inhibitor and the sampling component. Diffusion experiments are carried out at different heights of the components; when the corrosion inhibitor is subjected to diffusion experiments under high pressure, multiple groups of pipes are taken in the same way to form a sealed experimental environment. After the pipes and the device are placed vertically, the expansion component and the connecting component are closed, and the gas is filled into the sealed experimental environment through the expansion component by using the inflation device. The gas increases continuously to form high pressure, and the connecting pipe is used to connect with the corrosion inhibitor adding device to introduce the corrosion inhibitor into the sealed experimental environment. After a period of time, the corrosion inhibitor will diffuse along the inner wall of the pipe until each sampling component obtains a sample. The concentration of the corrosion inhibitor is detected by using an ultraviolet-visible spectrophotometer to complete the diffusion experiment of the corrosion inhibitor under high pressure. When the corrosion inhibitor is not between the sampling components, the corrosion inhibitor is injected into the sample container. When conducting a diffusion experiment at the same spacing, multiple groups of pipes are similarly taken to form a sealed experimental environment. After the pipes and the device are placed vertically, the expansion component and the air inlet component are closed, forcing the connecting component to be connected to the inflation device. The inflation device is used to introduce gas into the connecting component. Under the action of the distance adjustment component, the spacing between the sampling components is adjusted so that the spacing between the sampling components in two adjacent groups of pipes is different. The corrosion inhibitor is introduced into the sealed experimental environment. After a period of time, the corrosion inhibitor will diffuse along the inner wall of the pipe until each sampling component obtains a sample. The concentration of the corrosion inhibitor is detected using a UV-visible spectrophotometer to complete the diffusion experiment of the corrosion inhibitor at different spacings between the sampling components.In summary, the multi-layer corrosion inhibitor diffusion experimental device of the present application can achieve control and adjustment effects on the device, realize device state switching, and realize corrosion inhibitor diffusion experiments under various different states. This facilitates control and comparison experiments, facilitates the device to conduct corrosion inhibitor diffusion experiments, and can obtain multiple sets of experimental data, enriching experimental results, facilitating the establishment of corrosion inhibitor analysis models, facilitating corrosion inhibitor diffusion analysis, and improving the certainty and accuracy of experimental data, thereby improving the quality of research on corrosion inhibitor diffusion experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a three-dimensional structural entity diagram of the present invention;

[0020] Figure 2 A structural entity diagram of the support assembly of the present invention;

[0021] Figure 3 A connection diagram of the internal structure of the present invention;

[0022] Figure 4 A structural entity diagram of the expansion assembly of the present invention;

[0023] Figure 5 A structural entity diagram of the regulating assembly of the present invention;

[0024] Figure 6 A structural entity diagram of the air intake assembly of the present invention;

[0025] Figure 7 It is a partial structural entity diagram of the present invention;

[0026] Figure 8 A structural entity diagram of the distance adjustment assembly of the present invention;

[0027] Figure 9 A structural entity diagram of the sampling assembly of the present invention;

[0028] Figure 10 It is a structural entity diagram of the clamping assembly of the present invention.

[0029] In the figure: 1. Connecting pipe; 2. Ventilation pipe; 3. Support assembly; 301. Liquid inlet outer pipe; 302. Liquid inlet inner pipe; 303. Liquid outlet; 304. Annular support plate; 4. Expansion assembly; 401. Connecting block 1; 402. Air delivery pipe 1; 403. Solenoid valve 1; 404. Expansion airbag; 405. Connecting pipe; 5. Adjustment assembly; 501. Adjustment motor; 502. Adjustment spur rack; 503. Adjustment gear; 6. Air intake assembly; 601. Connecting block 2; 602. Air intake pipe; 603. Air intake nozzle; 604. Solenoid valve 2; 7. Push assembly; 701. Electric push rod 1 ;702, push rod;703, connecting plate;8, distance adjustment assembly;801, sliding block;802, mounting plate;803, regulating airbag;9, ​​connecting assembly;901, connecting block three;902, gas supply pipe two;903, gas distribution pipe;904, solenoid valve three;10, sampling assembly;1001, sampling tube;1002, sampling nozzle;1003, electric push rod two;1004, sampling piston;11, snap assembly;1101, snap outer rod;1102, snap inner rod;1103, stop block;1104, snap spring;1105, snap hook;1106, buckle. DETAILED DESCRIPTION

[0030] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0031] Example 1:

[0032] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10As shown, a multi-layer corrosion inhibitor diffusion experimental device of the present invention includes a connecting pipe 1 and a vent pipe 2. The connecting pipe 1 is provided with a support component 3 adapted to the pipeline, the support component 3 is provided with an expansion component 4 connected to the vent pipe 2, the expansion component 4 contacts the inner wall of the pipeline to form a sealed experimental environment, the support component 3 is provided with an adjustment component 5 for adjusting the support component 3, the support component 3 is provided with an air intake component 6 connected to the expansion component 4, the support component 3 is provided with a pushing component 7, the pushing component 7 is provided with a distance adjustment component 8, and the distance adjustment component 8 A connecting component 9 is provided between the expansion component 4, a sampling component 10 is provided on the distance-adjusting component 8, and a clamping component 11 is provided between the sampling component 10 and the distance-adjusting component 8; wherein, when the adjusting component 5 adjusts the supporting component 3, a diffusion experiment of the liquid level of the corrosion inhibitor at different heights from the sampling component 10 is realized; when the air intake component 6 is connected to the sealed experimental environment, a diffusion experiment of the corrosion inhibitor is carried out under high pressure; when the connecting component 9 connects the expansion component 4 with the distance-adjusting component 8, a diffusion experiment of the corrosion inhibitor is carried out at different distances from the sampling component 10.

[0033] Working principle: When the corrosion inhibitor is diffused, the device is passed through the pipeline so that the two support components 3 are located inside the pipeline to both sides of the experimental position. When the corrosion inhibitor liquid level is at different heights from the sampling component 10 for diffusion experiment, the adjustment component 5 is started, and the adjustment component 5 drives the support component 3 to move, so that the support components 3 are close to or away from each other, thereby adjusting the distance between a support component 3 and the sampling component 10. Multiple groups of pipelines are used to form a comparative experiment. The ventilation pipe 2 is connected to the inflation device to force the inflation device to inflate the expansion component 4, forcing the expansion component 4 to expand until the expansion component 4 expands to abut against the inner wall of the pipeline to form a sealed experimental environment. The pipeline and the device are placed vertically, and the pushing component 7 is started to force The pushing component 7 drives the distance adjustment component 8 and the connecting component 9 to move synchronously until the sampling component 10 contacts the inner wall of the pipeline, closes the expansion component 4 and the air intake component 6, and uses the connecting pipe 1 to connect with the corrosion inhibitor adding device. The corrosion inhibitor adding device forces the corrosion inhibitor to be introduced into the sealed experimental environment through the connecting pipe 1 and the supporting component 3 until the corrosion inhibitor is located at the experimental position in the pipeline. After a period of time, the corrosion inhibitor will diffuse along the inner wall of the pipeline until each sampling component 10 obtains a sample. After the experiment is completed, the device is withdrawn from the pipeline, and the sampling component 10 is removed using the clamping component 11. The concentration of the corrosion inhibitor in each sampling component 10 of each group of experiments is detected and analyzed using an ultraviolet-visible spectrophotometer to achieve liquid corrosion of the corrosion inhibitor. Diffusion experiments are carried out at different heights from the sampling component 10; when the corrosion inhibitor is subjected to a diffusion experiment under high pressure, multiple groups of pipes are taken in the same way to form a sealed experimental environment. After the pipes and the device are placed vertically, the expansion component 4 and the connecting component 9 are closed, and the gas is filled into the sealed experimental environment through the expansion component 4 using an inflation device. The gas increases continuously to form a high pressure, and the connecting pipe 1 is used to connect with the corrosion inhibitor adding device to introduce the corrosion inhibitor into the sealed experimental environment. After a period of time, the corrosion inhibitor will diffuse along the inner wall of the pipe until each sampling component 10 obtains a sample, and the concentration of the corrosion inhibitor is detected using an ultraviolet-visible spectrophotometer to complete the diffusion experiment of the corrosion inhibitor under high pressure; when the corrosion inhibitor is between the sampling components 10 When conducting diffusion experiments at different spacings between the pipes, similarly, multiple groups of pipes are taken to form a sealed experimental environment. After the pipes and the device are placed vertically, the expansion component 4 and the air inlet component 6 are closed, forcing the connecting component 9 to be connected to the inflation device. The gas is introduced into the connecting component 9 by using the inflation device. Under the action of the distance adjustment component 8, the spacing between the sampling components 10 is adjusted so that the spacings of the sampling components 10 in two adjacent groups of pipes are different. The corrosion inhibitor is introduced into the sealed experimental environment. After a period of time, the corrosion inhibitor will diffuse along the inner wall of the pipe until each sampling component 10 obtains a sample. The concentration of the corrosion inhibitor is detected by using an ultraviolet-visible spectrophotometer to complete the diffusion experiment of the corrosion inhibitor at different spacings between the sampling components 10.In summary, the multi-layer corrosion inhibitor diffusion experimental device of the present application can achieve control and adjustment effects on the device, realize device state switching, and realize corrosion inhibitor diffusion experiments under various different states. This facilitates control and comparison experiments, facilitates the device to conduct corrosion inhibitor diffusion experiments, and can obtain multiple sets of experimental data, enriching experimental results, facilitating the establishment of corrosion inhibitor analysis models, facilitating corrosion inhibitor diffusion analysis, and improving the certainty and accuracy of experimental data, thereby improving the quality of research on corrosion inhibitor diffusion experiments.

[0034] Example 2:

[0035] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 As shown, a multi-film layer corrosion inhibitor diffusion experimental device of the present invention, the support component 3 includes a liquid inlet outer tube 301 arranged on the connecting tube 1, a liquid inlet inner tube 302 is slidably arranged inside the liquid inlet outer tube 301, a liquid outlet 303 is arranged on the liquid inlet inner tube 302, and an annular support plate 304 is provided on both the liquid inlet outer tube 301 and the liquid inlet inner tube 302.

[0036] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 As shown, a multi-film layer corrosion inhibitor diffusion experimental device of the present invention, the adjustment component 5 includes an adjustment motor 501 arranged on the liquid inlet outer tube 301, an adjustment spur rack 502 penetrating the liquid inlet outer tube 301 is arranged on the liquid inlet inner tube 302, and an adjustment gear 503 meshing with the adjustment spur rack 502 is connected to the output shaft of the adjustment motor 501.

[0037] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10As shown, a multi-film layer corrosion inhibitor diffusion experimental device of the present invention, the expansion component 4 includes a connecting block 401, a gas pipe 402 is provided on the connecting block 401, a solenoid valve 403 is provided on the gas pipe 402, an expansion air bag 404 connected to the gas pipe 402 is provided on the annular support plate 304, a connecting pipe 405 is provided on the connecting block 401, and the two connecting blocks 401 are connected through the connecting pipe 405.

[0038] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 As shown, a multi-film corrosion inhibitor diffusion experimental device of the present invention, the air intake component 6 includes a connecting block 2 601 arranged on the connecting pipe 405, an air intake pipe 602 is arranged on the connecting block 2 601, an air intake nozzle 603 is arranged on the air intake pipe 602, and an electromagnetic valve 2 604 is installed on the air intake pipe 602.

[0039] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 As shown, a multi-film layer corrosion inhibitor diffusion experimental device of the present invention, the pushing component 7 includes an electric push rod 701 installed on the liquid inlet outer tube 301, the output end of the electric push rod 701 is provided with a pushing rod 702, and the pushing rod 702 is provided with a connecting plate 703.

[0040] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 As shown, a multi-film layer corrosion inhibitor diffusion experimental device of the present invention, the distance adjustment component 8 includes a sliding block 801 arranged on the connecting plate 703, a plurality of evenly distributed mounting plates 802 are arranged on the sliding block 801, and an adjusting airbag 803 is arranged on the mounting plate 802. The mounting plates 802 correspond to the adjusting airbags 803 one by one and are alternately connected, wherein the first adjusting airbag 803 is connected to the connecting plate 703.

[0041] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 As shown, a multi-film layer corrosion inhibitor diffusion experimental device of the present invention, the connecting component 9 includes a connecting block three 901 arranged on the connecting pipe 405, the connecting block three 901 is provided with a gas pipe two 902, the gas pipe two 902 is provided with a gas distribution pipe 903 connected to the regulating air bag 803, and the gas distribution pipe 903 is installed with a solenoid valve three 904.

[0042] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 As shown, a multi-film corrosion inhibitor diffusion experimental device of the present invention, the sampling component 10 includes a sampling tube 1001 arranged on a mounting plate 802, the sampling tube 1001 is provided with a sampling nozzle 1002 in contact with the inner wall of the pipe, an electric push rod 1003 is installed in the mounting plate 802, and the output end of the electric push rod 1003 is provided with a sampling piston 1004 adapted to the sampling tube 1001.

[0043] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 As shown, a multi-film layer corrosion inhibitor diffusion experimental device of the present invention, the clamping component 11 includes a clamping outer rod 1101 hinged on the sampling tube 1001, a clamping inner rod 1102 is inserted on the clamping outer rod 1101, a stopper 1103 is provided on the clamping inner rod 1102, a clamping spring 1104 is provided between the stopper 1103 and the clamping outer rod 1101 and is sleeved on the outer ring of the clamping inner rod 1102, a clamping hook 1105 is hinged on the stopper 1103, and a buckle 1106 adapted to the clamping hook 1105 is provided on the mounting plate 802.

[0044] Working principle: When conducting a diffusion experiment on the corrosion inhibitor, the device is passed through the pipeline so that the two annular support plates 304 are located inside the pipeline on both sides of the experimental position. When the corrosion inhibitor liquid level is at different heights from the first sampling tube 1001 for diffusion experiment, the adjustment motor 501 is started, and the output shaft of the adjustment motor 501 rotates to drive the adjustment gear 503 to rotate, and the adjustment gear 503 rotates to drive the adjustment spur rack 502 to move, so that the adjustment spur rack 502 drives the liquid inlet inner tube 302 to move in the liquid inlet outer tube 301, so that the liquid inlet inner tube 302 extends or contracts in the liquid inlet outer tube 301, thereby adjusting the distance between an annular support plate 304 and the sampling tube 1001;

[0045] Multiple sets of pipes were used for comparative experiments. The ventilation pipe 2 was connected to the inflation device. The inflation device opened the solenoid valve 403 through the ventilation pipe 2, the connecting block 401, and the connecting pipe 405, forcing gas into the gas pipe 402, forcing the inflation airbag 404 to inflate. The inflation airbag 404 expanded until it abutted against the inner wall of the pipe, causing the device to be firmly fixed in the pipe, forming a sealed experimental environment.

[0046] Place the pipeline and the device vertically, start the electric push rod 1 701, and the output end of the electric push rod 1 701 drives the push rod 702 to move, which drives the connecting plate 703 to move, and the connecting plate 703 drives the sliding block 801, the mounting plate 802, and the adjustment airbag 803 to move, forcing the electric push rod 2 1003, the sampling tube 1001, and the sampling nozzle 1002 to move until the sampling nozzle 1002 moves to contact the inner wall of the pipeline;

[0047] Close the solenoid valve 1 403, the solenoid valve 2 604 and the solenoid valve 3 904, and connect the connecting pipe 1 to the corrosion inhibitor adding device. The corrosion inhibitor adding device introduces the corrosion inhibitor into the sealed experimental environment through the connecting pipe 1, the liquid inlet outer pipe 301, the liquid inlet inner pipe 302 and the liquid outlet 303 until the corrosion inhibitor is located at the experimental position in the pipeline. After a period of time, the corrosion inhibitor will diffuse along the inner wall of the pipeline until each sampling tube 1001 obtains a diffused corrosion inhibitor sampling sample. When obtaining the corrosion inhibitor, the electric push rod 2 1003 pulls the sampling piston 1004, forcing the sampling piston 1004 to move in the sampling tube 1001, forcing a negative pressure to form in the sampling tube 1001. When the corrosion inhibitor diffuses to the sampling nozzle 1002, the corrosion inhibitor enters the sampling tube 1001 under the action of the negative pressure, so that the sampling tube 1001 stores the corrosion inhibitor;

[0048] After the experiment is completed, the device is withdrawn from the pipeline, the clamping hook 1105 is pulled, and the clamping inner rod 1102 slides in the clamping outer rod 1101. Under the action of the stopper 1103, the clamping spring 1104 is stretched, forcing the clamping hook 1105 to disengage from the buckle 1106. The clamping inner rod 1102 and the clamping outer rod 1101 are rotated, and the sampling tube 1001 is removed. The concentration of the corrosion inhibitor in each sampling tube 1001 of each group of experiments is detected and analyzed using a UV-visible spectrophotometer to achieve a diffusion experiment at different heights of the liquid level of the corrosion inhibitor from the sampling tube 1001;

[0049] When the corrosion inhibitor is subjected to a diffusion experiment under high pressure, multiple groups of pipes are similarly taken to form a sealed experimental environment. After the pipes and the device are placed vertically, the solenoid valve 1 403 and the solenoid valve 3 904 are closed. The inflation device is passed through the vent pipe 2, the connecting block 1 401 and the connecting pipe 405, and the solenoid valve 2 604 is opened to force the gas into the connecting block 2 601 and the air inlet pipe 602. The gas is introduced into the sealed experimental environment through the air inlet nozzle 603. The gas increases continuously to form a high pressure. The connecting pipe 1 is used to connect with the corrosion inhibitor adding device to introduce the corrosion inhibitor into the sealed experimental environment. After a period of time, the corrosion inhibitor will diffuse along the inner wall of the pipe until each sampling tube 1001 obtains a sample. The concentration of the corrosion inhibitor is detected using a UV-visible spectrophotometer to complete the diffusion experiment of the corrosion inhibitor under high pressure.

[0050] When the corrosion inhibitor is diffused at different intervals between two adjacent sampling tubes 1001, multiple groups of pipes are taken in the same way to form a sealed experimental environment. After the pipes and the device are placed vertically, the solenoid valve 1 403 and the solenoid valve 2 604 are closed, and the solenoid valve 3 904 is opened to force the gas distribution pipe 903 to be connected with the inflation device. The inflation device is used to introduce gas into the connecting block 3 901, the gas delivery pipe 2 902 and the gas distribution pipe 903, forcing the gas to be filled into the regulating airbag 803, causing the regulating airbag 803 to expand. Under the action of the sliding block 801, the mounting plate 802 moves, forcing The regulating airbag 803 is inflated to a reasonable degree, and the mounting plate 802 drives the sampling tube 1001 to move until a reasonable distance is formed between two adjacent sampling tubes 1001, and the distances between the sampling tubes 1001 in two adjacent groups of pipelines are different. The corrosion inhibitor is introduced into a sealed experimental environment. After a period of time, the corrosion inhibitor will diffuse along the inner wall of the pipeline until each sampling tube 1001 obtains a sample. The concentration of the corrosion inhibitor is detected using an ultraviolet-visible spectrophotometer to complete the diffusion experiment of the corrosion inhibitor at different distances between two adjacent sampling tubes 1001.

[0051] This solution can achieve the control and regulation effect of the device, realize the state switching of the device, and realize the diffusion experiment of the corrosion inhibitor in three different states. It is beneficial to control the comparative experiment, facilitate the device to conduct diffusion experiments on the corrosion inhibitor, obtain multiple sets of experimental data, enrich the experimental results, facilitate the establishment of an analysis model for the corrosion inhibitor, facilitate the analysis of the diffusion of the corrosion inhibitor, improve the certainty of the experimental data, improve the accuracy of the experimental data, and thus improve the research quality of the corrosion inhibitor diffusion experiment.

[0052] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A multi-layer corrosion inhibitor diffusion experimental device, characterized in that: The invention comprises a connecting pipe (1) and a vent pipe (2), wherein the connecting pipe (1) is provided with a supporting assembly (3) adapted to the pipeline, the supporting assembly (3) is provided with an expansion assembly (4) in communication with the vent pipe (2), the expansion assembly (4) contacts the inner wall of the pipeline to form a sealed experimental environment, the supporting assembly (3) is provided with an adjusting assembly (5) for adjusting the supporting assembly (3), the supporting assembly (3) is provided with an air intake assembly (6) in communication with the expansion assembly (4), the supporting assembly (3) is provided with a pushing assembly (7), the pushing assembly (7) is provided with a distance adjusting assembly (8), the distance adjusting assembly (8) and the expansion assembly ( 4), a connecting component (9) is provided between the distance adjustment component (8), a sampling component (10) is provided on the distance adjustment component (8), and a clamping component (11) is provided between the sampling component (10) and the distance adjustment component (8); wherein, when the adjusting component (5) adjusts the supporting component (3), a diffusion experiment of the liquid level of the corrosion inhibitor at different heights from the sampling component (10) is realized; when the air intake component (6) is connected to the sealed experimental environment, a diffusion experiment of the corrosion inhibitor under high pressure is realized; when the connecting component (9) connects the expansion component (4) with the distance adjustment component (8), a diffusion experiment of the corrosion inhibitor at different distances from the sampling component (10) is realized.

2. A multi-layer corrosion inhibitor diffusion experimental device according to claim 1, characterized in that: The support assembly (3) comprises an outer liquid inlet tube (301) arranged on the connecting tube (1), an inner liquid inlet tube (302) slidably arranged inside the outer liquid inlet tube (301), a liquid outlet (303) provided on the inner liquid inlet tube (302), and an annular support plate (304) provided on both the outer liquid inlet tube (301) and the inner liquid inlet tube (302).

3. A multi-layer corrosion inhibitor diffusion experimental device according to claim 2, characterized in that: The regulating assembly (5) comprises a regulating motor (501) arranged on the liquid inlet outer tube (301); a regulating spur rack (502) penetrating the liquid inlet outer tube (301) is arranged on the liquid inlet inner tube (302); and an regulating gear (503) meshing with the regulating spur rack (502) is connected to the output shaft of the regulating motor (501).

4. A multi-layer corrosion inhibitor diffusion experimental device according to claim 3, characterized in that: The expansion assembly (4) includes a connection block (401) provided thereon, an air delivery pipe (402) provided thereon, an electromagnetic valve (403) provided thereon, an expansion air bag (404) in communication with the air delivery pipe (402) provided thereon, the annular support plate (304) provided thereon, the connection block (401) provided thereon, a connection pipe (405) provided thereon, and the two connection blocks (401) are connected via the connection pipe (405).

5. A multi-layer corrosion inhibitor diffusion experimental device according to claim 4, characterized in that: The air intake assembly (6) comprises a second connecting block (601) arranged on the connecting pipe (405), an air intake pipe (602) is arranged on the second connecting block (601), an air intake nozzle (603) is arranged on the air intake pipe (602), and a second solenoid valve (604) is installed on the air intake pipe (602).

6. A multi-layer corrosion inhibitor diffusion experimental device according to claim 5, characterized in that: The pushing assembly (7) comprises an electric push rod (701) mounted on the liquid inlet outer tube (301), an output end of the electric push rod (701) is provided with a pushing rod (702), and a connecting plate (703) is provided on the pushing rod (702).

7. A multi-layer corrosion inhibitor diffusion experimental device according to claim 6, characterized in that: The distance adjustment assembly (8) comprises a sliding block (801) arranged on the connecting plate (703), a plurality of evenly distributed mounting plates (802) are arranged on the sliding block (801), and an adjusting airbag (803) is arranged on the mounting plate (802). The mounting plates (802) correspond to the adjusting airbags (803) in a one-to-one manner and are alternately connected, wherein the first adjusting airbag (803) is connected to the connecting plate (703).

8. The multi-layer corrosion inhibitor diffusion experimental device according to claim 7, characterized in that: The connecting assembly (9) includes a connecting block three (901) arranged on the connecting pipe (405), a gas supply pipe two (902) arranged on the connecting block three (901), a gas distribution pipe (903) connected to the regulating air bag (803) arranged on the gas distribution pipe two (902), and a solenoid valve three (904) installed on the gas distribution pipe (903).

9. The multi-layer corrosion inhibitor diffusion experimental device according to claim 8, characterized in that: The sampling assembly (10) includes a sampling tube (1001) arranged on the mounting plate (802), the sampling tube (1001) is provided with a sampling nozzle (1002) in contact with the inner wall of the pipeline, a second electric push rod (1003) is installed in the mounting plate (802), and the output end of the second electric push rod (1003) is provided with a sampling piston (1004) adapted to the sampling tube (1001).

10. The multi-layer corrosion inhibitor diffusion experimental device according to claim 9, characterized in that: The snap-fit ​​assembly (11) comprises a snap-fit ​​outer rod (1101) hinged on the sampling tube (1001), a snap-fit ​​inner rod (1102) inserted on the snap-fit ​​outer rod (1101), a stopper (1103) provided on the snap-fit ​​inner rod (1102), a snap-fit ​​spring (1104) sleeved on the outer ring of the snap-fit ​​inner rod (1102) provided between the stopper (1103) and the snap-fit ​​outer rod (1101), a snap-fit ​​hook (1105) hinged on the stopper (1103), and a buckle (1106) adapted to the snap-fit ​​hook (1105) provided on the mounting plate (802).

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