Laboratory simulation device for dry-wet alternation of jacket

Abstract

The utility model relates to the technical field of corrosion experiments, in particular to a laboratory simulation device for dry-wet alternation of a jacket, which comprises an experiment box and a working condition simulation mechanism, and the working condition simulation mechanism comprises a temperature control assembly, an ion concentration control assembly and a brightness control assembly. And the ion concentration control assembly comprises an ion probe arranged on the experiment box. When the corrosion environment of the jacket in seawater is simulated, the temperature, the ion concentration and the brightness in the experiment box are respectively controlled through the temperature control assembly, the ion concentration control assembly and the brightness control assembly; wherein the ion probe can detect the ion concentration in the experiment box and perform corresponding adjustment through the ion concentration control assembly according to the detected ion concentration until the ion concentration in the experiment box is the same as the actual seawater environment where the jacket is located, so that the simulation effect on the seawater environment where the jacket is located can be improved; and the detection efficiency of the corrosion influence of the seawater environment on the jacket is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of corrosion experiments, in particular to a dry-wet alternating laboratory simulation device for a catheter rack. Background Art

[0002] The jacket is a structure used to support submarine oil and gas pipelines. It is made of steel and is often exposed to severe marine environments such as seawater immersion, wave impact, and seawater erosion, making it prone to corrosion damage. The corrosion environment of the jacket in seawater can be simulated to study the corrosion mechanism and corrosion rate of the jacket material, optimize the material selection and protection measures, and improve the service life and safety of the jacket.

[0003] The detection device for the seawater corrosion environment of the conductor frame usually simulates the seawater environment by measuring and adjusting the ion concentration of the test solution in which the conductor frame is located. However, the detection device for the seawater corrosion environment of the conductor frame usually only detects the liquid level of the test solution to evaluate the ion concentration. The detection result is not accurate, and the simulation effect of the seawater environment is poor, which in turn affects the detection efficiency of the corrosion effect of the seawater environment on the conductor frame. Utility Model Content

[0004] Based on the technical problems existing in the above-mentioned prior art, the utility model provides a dry-wet alternating laboratory simulation device for a conductor frame, which can improve the simulation effect of the seawater environment in which the conductor frame is located, thereby improving the detection efficiency of the corrosion effect of the seawater environment on the conductor frame.

[0005] The technical solution adopted by the utility model to solve its technical problems is: to provide a catheter rack dry-wet alternating laboratory simulation device, including an experimental box and a working condition simulation mechanism, the experimental box is provided with a box cover, the box cover is used to place a test piece, the working condition simulation mechanism includes a temperature control component, an ion concentration control component and a brightness control component, the temperature control component, the ion concentration control component and the brightness control component are all arranged on one side of the experimental box, the ion concentration control component includes an ion probe arranged on the experimental box, and the ion probe can detect the ion concentration in the experimental box.

[0006] Furthermore, the temperature control component includes a temperature sensor arranged on the experimental box, a temperature controller electrically connected to the temperature sensor, and a heating rod electrically connected to the temperature controller. The experimental box is provided with a mounting hole, and the mounting hole is provided with a connecting pipe. The heating rod and the temperature sensor are both placed in the experimental box through the connecting pipe.

[0007] Furthermore, the temperature sensor is a thermocouple sensor.

[0008] Furthermore, the ion concentration control component also includes a concentration controller electrically connected to the ion probe and water pump 1 and water pump 2 electrically connected to the concentration controller. The ion concentration control component also includes storage box 1, storage box 2 and water pipes arranged on the water tanks. The storage box 1 is used to store distilled water, and the storage box 2 is used to store ion solutions. The storage box 1 and the storage box 2 are connected to the experimental box through water pipes, the water pump 1 is connected to the water outlet of the storage box 1, and the water pump 2 is connected to the water outlet 2 of the storage box 2.

[0009] Furthermore, the brightness control component includes a light source sensor arranged on the experimental box, a light source controller electrically connected to the light source sensor, and an LED light source electrically connected to the light source controller. The light source sensor and the LED light source are both placed in the experimental box through the connecting tube.

[0010] Furthermore, the catheter rack dry-wet alternating laboratory simulation device also includes a clamping assembly arranged on the box cover, the clamping assembly includes a mounting block arranged on the box cover, a connecting rod movably connected to the mounting block, and a test piece clamp connected to the connecting rod, the test piece clamp includes a fixing bolt and two oppositely arranged clamping plates, the fixing bolt is threadedly connected to the two clamping plates, the two clamping plates are connected by the fixing bolt, and the test piece is located between the two clamping plates.

[0011] Furthermore, the two clamping plates are provided with gaskets, and the gaskets are located between the clamping plates and the test pieces.

[0012] Furthermore, the catheter rack dry-wet alternating laboratory simulation device also includes a stirring device, which includes a stirring motor, a stirring paddle coaxially fixed with the output shaft of the stirring motor, and a support bearing arranged on the output shaft of the stirring motor. The experimental box is provided with a connecting hole, the output shaft of the stirring motor passes through the connecting hole, and the stirring paddle is located in the experimental box.

[0013] Furthermore, a sealing ring is provided in the connecting hole.

[0014] The beneficial effect of the utility model is: to provide a dry-wet alternating laboratory simulation device for a catheter rack, including an experimental box and a working condition simulation mechanism, the experimental box is provided with a box cover, the box cover is used to place a test piece, the working condition simulation mechanism includes a temperature control component, an ion concentration control component and a brightness control component, the temperature control component, the ion concentration control component and the brightness control component are all arranged on one side of the experimental box, the ion concentration control component includes an ion probe arranged on the experimental box, and the ion probe can detect the ion concentration in the experimental box. When simulating the corrosive environment in which the catheter rack is located in seawater, the temperature, ion concentration and brightness in the experimental box are controlled respectively by the temperature control component, the ion concentration control component and the brightness control component, wherein the ion probe can detect the ion concentration in the experimental box and make corresponding adjustments according to the detected ion concentration through the ion concentration control component until the ion concentration in the experimental box is the same as the seawater environment in which the actual catheter rack is located, thereby improving the simulation effect of the seawater environment in which the catheter rack is located, and then improving the detection efficiency of the corrosion effect of the seawater environment on the catheter rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] In the figure: Figure 1 The overall structure diagram of a dry-wet alternating laboratory simulation device for a catheter rack provided by the utility model;

[0017] Figure 2 for Figure 1 An exploded view of the dry-wet alternating laboratory simulation device for a jacket is shown;

[0018] Figure 3 for Figure 2 The three-dimensional structural diagram of the working condition simulation mechanism shown;

[0019] Figure 4 for Figure 2 A three-dimensional structural diagram of the clamping assembly shown;

[0020] Figure 5 for Figure 2 The three-dimensional structural diagram of the stirring device shown.

[0021] Description of reference numerals: 100, dry-wet alternating laboratory simulation device for catheter rack; 10, experimental box; 11, connecting hole; 12, mounting hole; 121, connecting pipe; 13, sealing ring; 14, box cover; 20, working condition simulation mechanism; 21, temperature control component; 211, temperature sensor; 212, temperature controller; 213, heating rod; 22, ion concentration control component; 221, ion probe; 222, concentration controller; 223, water pump 1; 224, Water pump 2; 225, storage box 1; 226, storage box 2; 227, water pipe; 23, brightness control component; 231, light source sensor; 232, light source controller; 233, LED light source; 30, clamping component; 31, mounting block; 32, connecting rod; 33, test piece clamp; 331, fixing bolt; 332, clamping plate; 333, gasket; 40, stirring device; 41, stirring motor; 42, stirring paddle; 43, support bearing; 50, test piece. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model is now described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basics of the utility model in a schematic manner, so it only shows the structure related to the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] Please refer to Figure 1-5 A catheter rack dry-wet alternating laboratory simulation device 100 includes an experimental box 10 and a working condition simulation mechanism 20. The experimental box 10 is provided with a box cover 14, and the box cover 14 is used to place a test piece. Specifically, the experimental box 10 is made of corrosion-resistant PVC material to prevent the simulated environment from corroding the box itself.

[0024] The experimental box 10 is provided with a connecting hole 11 , and the experimental box 10 is provided with a mounting hole 12 . The mounting hole 12 is provided with a connecting pipe 121 . Sealing rings 13 are provided in both the connecting hole 11 and the mounting hole 12 .

[0025] The working condition simulation mechanism 20 includes a temperature control component 21 , an ion concentration control component 22 and a brightness control component 23 . The temperature control component 21 , the ion concentration control component 22 and the brightness control component 23 are all arranged on one side of the experimental box 10 .

[0026] The temperature control assembly 21 includes a temperature sensor 211 disposed on the experimental box 10, a temperature controller 212 electrically connected to the temperature sensor 211, and a heating rod 213 electrically connected to the temperature controller 212. The heating rod 213 and the temperature sensor 211 are both placed in the experimental box 10 through the connecting pipe 121. Specifically, the temperature sensor 211 is a thermocouple sensor.

[0027] When controlling the temperature in the experimental box 10, the temperature sensor 211 located in the experimental box 10 senses the temperature in the experimental box 10 and converts the acquired temperature into an electrical signal and transmits it to the temperature controller 212. The temperature controller 212 controls the temperature of the liquid in the experimental box 10 by controlling whether the heating rod 213 heats the liquid in the experimental box 10.

[0028] The ion concentration control component 22 includes an ion probe 221 disposed on the experimental box 10, a concentration controller 222 electrically connected to the ion probe 221, and a water pump 1 223 and a water pump 2 224 electrically connected to the concentration controller 222. The ion concentration control component 22 also includes a storage box 1 225, a storage box 2 226, and a water pipe 227 disposed on the water tank. The storage box 1 225 is used to store distilled water, and the storage box 2 226 is used to store ion solutions. The storage box 1 225 and the storage box 2 226 are connected to the experimental box 10 through the water pipe 227. The water pump 1 223 is connected to the water outlet of the storage box 1 225, and the water pump 2 224 is connected to the water outlet of the storage box 2 226. Specifically, in this embodiment, the ions are specifically iron ions, calcium ions, and magnesium ions. In fact, there are multiple storage boxes 2 226, and only one is shown in the figure.

[0029] When controlling the ion concentration in the experimental box 10, the ion probe 221 located in the experimental box 10 senses the ion concentration in the experimental box 10, and converts the acquired ion concentration into an electrical signal and transmits it to the concentration controller 222. The concentration controller 222 controls the opening and closing of water pump 1 223 and water pump 2 224, thereby controlling whether the distilled water in storage box 1 225 and the ion solution in storage box 2 226 enter the experimental box 10 to control the ion concentration in the experimental box 10.

[0030] The brightness control component 23 includes a light source sensor 231 disposed on the experimental box 10, a light source controller 232 electrically connected to the light source sensor 231, and an LED light source 233 electrically connected to the light source controller 232. The light source sensor 231 and the LED light source 233 are both placed in the experimental box 10 through the connecting tube 121. Specifically, in this embodiment, the housings of the light source sensor 231 and the LED light source 233 are both made of waterproof material.

[0031] When controlling the brightness of the light source in the experimental box 10, the light source sensor 231 located in the experimental box 10 senses the brightness of the light source in the experimental box 10, and converts the acquired light source brightness into an electrical signal and transmits it to the light source controller 232. The light source controller 232 controls the brightness of the light source in the experimental box 10 by controlling the brightness of the LED light source 233.

[0032] Specifically, in this embodiment, the temperature controller 212 , the concentration controller 222 , and the light source controller 232 are all PLC controllers.

[0033] The catheter rack dry-wet alternating laboratory simulation device 100 also includes a clamping assembly 30 arranged on the box cover, the clamping assembly 30 includes a mounting block 31 arranged on the box cover, a connecting rod 32 movably connected to the mounting block 31, and a test piece clamp 33 connected to the connecting rod 32, the test piece clamp 33 includes a fixing bolt 331 and two clamping plates 332 arranged oppositely, the fixing bolt 331 is threadedly connected to the two clamping plates 332, the two clamping plates 332 are connected by the fixing bolt 331, and the test piece is located between the two clamping plates 332.

[0034] Gaskets 333 are also provided on the two clamping plates 332. The gaskets 333 are located between the clamping plates 332 and the test piece to reduce the contact between the test piece and the clamping plates 332 and the fixing bolts 331, thereby reducing the impact of the materials of the clamping plates 332 and the fixing bolts 331 on the test piece during the experiment.

[0035] The catheter rack dry-wet alternating laboratory simulation device 100 further includes a stirring device 40, which includes a stirring motor 41, a stirring paddle 42 coaxially fixed to the output shaft of the stirring motor 41, and a support bearing 43 disposed on the output shaft of the stirring motor 41. The output shaft of the stirring motor 41 passes through the mounting hole 12, and the stirring paddle 42 is located in the experimental box 10. Specifically, the rotation speed of the stirring motor 41 is the same as the actual measured seawater rotation speed.

[0036] During the experiment, the stirring motor 41 drives the stirring paddle 42 to rotate, thereby driving the liquid in the test box 10 to stir, and the test piece 50 immersed in the liquid in the test box 10 is driven to shake, thereby simulating the corrosion effect of seawater shaking on the conductor frame.

[0037] When measuring the corrosion mechanism and corrosion rate of the catheter frame in seawater, first prepare a test piece 50 of the same material as the catheter frame, and use a vernier caliper to measure the size of the test piece 50, accurate to 0.02mm, and calculate the area of ​​the test piece 50; configure the seawater sample according to the seawater ion concentration measured on site, and pour the configured seawater sample into the water tank; set the temperature value of the temperature control component 21, the concentration value of the concentration control component 22 and the brightness value of the brightness control component 23 under multiple time conditions according to the temperature, ion concentration and light source brightness changes of the seawater sample at different times; set the speed of the stirring motor 41 according to the actual flow rate of seawater on site, and start the stirring motor 41; if the temperature, ion concentration and light source brightness of the seawater sample in the experimental box 10 are different from the preset values ​​under different time conditions, adjust them respectively through the temperature controller 212, the concentration controller 222 and the light source controller 232. When the test piece 50 reaches the set test cycle, take out the test piece 50 and observe and record the surface corrosion morphology, and immediately rinse the test piece 50 with clean water and wipe it dry with filter paper.

[0038] Then, place the test piece 50 in a vessel with petroleum oil with a boiling range of 60℃~90℃, remove the oil stain on the surface of the test piece 50 with absorbent cotton, take out the test piece 50 and soak it in the acid cleaning solution for 5 minutes, and wipe the corrosion products on the surface of the test piece with absorbent cotton; take out the test piece 50 from the cleaning solution, rinse the residual acid on the surface with tap water, and then dehydrate it in anhydrous ethanol. Take out the test piece 50 and place it on the filter paper, blow it dry with cold wind, then wrap the test piece 50 with filter paper, store it in a desiccator, and weigh it after leaving it for 1 hour, with an accuracy of 0.1mg.

[0039] Then, the corrosion rate of the test piece 50 is measured according to the weight loss method:

[0040]

[0041] in:

[0042] r c ——Uniform corrosion rate (mm / year);

[0043] m——mass of the test piece before the experiment (g);

[0044] m1——mass of the test piece after the test (g);

[0045] S——Total area of ​​test piece (cm 2 );

[0046] P——Density of the test piece material (g / cm 3 );

[0047] t——experimental time (h).

[0048] The corrosion rate of the test piece measured above can be used to predict the corrosion condition of the conductor frame under actual working conditions on site.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] The above is based on the ideal embodiment of the utility model. Through the above description, relevant staff can make various changes and modifications without departing from the scope of the utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A dry-wet alternating laboratory simulation device for a catheter rack, characterized by: The invention comprises an experimental box (10) and an operating condition simulation mechanism (20), wherein the experimental box (10) is provided with a box cover (14), wherein the box cover (14) is used to place a test piece (50), and wherein the operating condition simulation mechanism (20) comprises a temperature control component (21), an ion concentration control component (22), and a brightness control component (23), wherein the temperature control component (21), the ion concentration control component (22), and the brightness control component (23) are all arranged on one side of the experimental box (10), and wherein the ion concentration control component (22) comprises an ion probe (221) arranged on the experimental box, wherein the ion probe (221) is capable of detecting the ion concentration in the experimental box (10).

2. The dry-wet alternating laboratory simulation device for a catheter rack according to claim 1, characterized in that: The temperature control component (21) comprises a temperature sensor (211) arranged on the experimental box (10), a temperature controller (212) electrically connected to the temperature sensor (211), and a heating rod (213) electrically connected to the temperature controller (212); a mounting hole (12) is provided on the experimental box (10); a connecting pipe (121) is provided on the mounting hole (12); the heating rod (213) and the temperature sensor (211) are both placed in the experimental box (10) through the connecting pipe (121).

3. The dry-wet alternating laboratory simulation device for a catheter rack according to claim 2, characterized in that: The temperature sensor (211) is a thermocouple sensor.

4. The dry-wet alternating laboratory simulation device for a catheter rack according to claim 1, characterized in that: The ion concentration control component (22) further comprises a concentration controller (222) electrically connected to the ion probe (221) and a water pump 1 (223) and a water pump 2 (224) electrically connected to the concentration controller (222). The ion concentration control component (22) further comprises a storage tank 1 (225), a storage tank 2 (226) and a water pipe (227) arranged on the water tank. The storage tank 1 (225) is used to store distilled water, and the storage tank 2 (226) is used to store ion solution. The storage tank 1 (225) and the storage tank 2 (226) are connected to the experimental box (10) through the water pipe (227). The water pump 1 (223) is connected to the water outlet of the storage tank 1 (225), and the water pump 2 (224) is connected to the water outlet 2 of the storage tank 2 (226).

5. The dry-wet alternating laboratory simulation device for a catheter rack according to claim 2, characterized in that: The brightness control component (23) comprises a light source sensor (231) arranged on the experimental box (10), a light source controller (232) electrically connected to the light source sensor (231), and an LED light source (233) electrically connected to the light source controller (232); the light source sensor (231) and the LED light source (233) are both placed in the experimental box (10) through the connecting tube (121).

6. The dry-wet alternating laboratory simulation device for a catheter rack according to claim 1, characterized in that: The catheter rack dry-wet alternating laboratory simulation device (100) further comprises a clamping assembly (30) arranged on the box cover, the clamping assembly (30) comprising a mounting block (31) arranged on the box cover (14), a connecting rod (32) movably connected to the mounting block (31), and a test piece clamp (33) connected to the connecting rod (32), the test piece clamp (33) comprising a fixing bolt (331) and two clamping plates (332) arranged opposite to each other, the fixing bolt (331) and the two clamping plates (332) are both threadedly connected, the two clamping plates (332) are connected via the fixing bolt (331), and the test piece (50) is located between the two clamping plates (332).

7. The dry-wet alternating laboratory simulation device for a catheter rack according to claim 6, characterized in that: Gaskets (333) are also provided on the two clamping plates (332), and the gaskets (333) are located between the clamping plates (332) and the test piece (50).

8. The dry-wet alternating laboratory simulation device for a catheter rack according to claim 1, characterized in that: The catheter rack dry-wet alternating laboratory simulation device (100) further comprises a stirring device (40), wherein the stirring device (40) comprises a stirring motor (41), a stirring paddle (42) coaxially fixed to an output shaft of the stirring motor (41), and a support bearing (43) arranged on the output shaft of the stirring motor (41); the experimental box (10) is provided with a connecting hole (11), the output shaft of the stirring motor (41) passes through the connecting hole (11), and the stirring paddle (42) is located in the experimental box (10).

9. The dry-wet alternating laboratory simulation device for a catheter rack according to claim 8, characterized in that: A sealing ring (13) is provided in the connecting hole (11).

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