A tubing coating abrasion resistance test apparatus

Abstract

The utility model relates to oil pipe coating wear resistance test technical field, and disclose a kind of oil pipe coating wear resistance test equipment, including test main part, the bottom inner wall of test main part is slidably connected with two sliding blocks, two sliding blocks are moved by drive assembly between opposition, the top of two sliding blocks is fixed with connecting frame by bolt, the side of connecting frame is fixed with clamping frame by bolt, and pipe body is clamped between two clamping frames, and the inner diameter of pipe body is not greater than the center flow-through hole of clamping frame, the utility model simulates the fluid scouring situation that oil pipe is subjected to in actual working environment accurately, and the thickness variation of coating is tested, to evaluate the wear resistance performance of oil pipe coating, by being provided with drive assembly, sliding block can be driven to move on the bottom inner wall of test main part oppositely or in opposite directions, the distance between two clamping frames is adjusted, to adapt to the pipe body clamping requirement of different length.

Description

Technical Field

[0001] This utility model relates to the field of oil pipe coating wear resistance testing technology, and more specifically to an oil pipe coating wear resistance testing device. Background Technology

[0002] Oil pipes are typically covered with a protective coating on both the inner and outer surfaces to enhance their wear resistance, extend their service life, and facilitate maintenance.

[0003] Currently, the wear resistance of oil pipe coatings is mostly tested by examining the outer surface coating. However, due to the different spraying processes on the inner and outer surfaces of the oil pipe, there are errors in the testing of the wear-resistant coating on the inner and outer surfaces. This makes it impossible to accurately assess the actual wear resistance of the overall coating of the oil pipe, which in turn affects the overall quality judgment of the oil pipe product. Therefore, this paper proposes an oil pipe coating wear resistance testing device to evaluate the wear resistance performance of the oil pipe coating. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an oil pipe coating wear resistance testing device to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: an oil pipe coating wear resistance testing device, including a test body, two sliders are slidably connected to the bottom inner wall of the test body, the two sliders move towards each other through a drive component, a connecting frame is fixed to the top of the two sliders by bolts, a clamp is fixed to one side of the connecting frame by bolts, a pipe is clamped between the two clamps, and the inner diameter of the pipe is not greater than the central flow hole of the clamp, and a connecting hose connected to a water pump inside the test body is provided on the opposite sides of the two connecting frames.

[0006] As a further embodiment of this utility model, the driving assembly includes two lead screws that rotate on the inner wall of the bottom of the test body. Both lead screws are threadedly connected to the slider through a threaded cylinder, and a connecting shaft is fixed between the two lead screws through a coupling.

[0007] As a further embodiment of this invention, the two lead screws are symmetrically distributed.

[0008] As a further embodiment of this invention, one of the lead screws is driven by a motor inside the test body via a pulley and a belt.

[0009] As a further embodiment of this utility model, a mounting bracket is fixed to the bottom inner wall of the test body by bolts, a linear motor is provided on one side of the mounting bracket, and an ultrasonic probe is provided on the side of the linear motor facing the tube body.

[0010] As a further embodiment of this invention, the ultrasonic probe is tilted.

[0011] As a further embodiment of this utility model, an electrically controlled valve is provided between the connecting hose and the connecting frame to control the connection between the connecting hose and the pipe body.

[0012] As a further embodiment of this utility model, a lifting frame is slidably connected to the bottom inner wall of the test body, and multiple symmetrically distributed mounting holes are opened on the top of the lifting frame. A support frame is set in two mounting holes located in the same row, and an electric push rod that drives the lifting frame to rise and fall is fixed to the bottom inner wall of the test body by bolts.

[0013] The technical effects and advantages of this utility model are as follows: 1. This utility model evaluates the wear resistance of the oil pipe coating by accurately simulating the fluid erosion conditions experienced by the oil pipe in the actual working environment and testing the changes in coating thickness. 2. This utility model, by providing a driving component, can drive the slider to move towards or away from each other on the bottom inner wall of the test body, adjusting the distance between the two clamps to adapt to the clamping requirements of tubes of different lengths; 3. This utility model is equipped with an ultrasonic probe, and a linear motor drives the ultrasonic probe to reciprocate at a constant speed along the axial direction of the tube, thereby realizing continuous scanning and detection of different positions of the coating on the inner surface of the tube, providing accurate data support for subsequent wear degree analysis. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is an enlarged schematic diagram of the slide block structure of this utility model.

[0016] Figure 3 This is an enlarged structural schematic diagram of the lifting frame of this utility model.

[0017] Figure 4 This is an enlarged schematic diagram of the linear motor structure of this utility model.

[0018] The attached figures are labeled as follows: 1. Test body; 2. Connecting hose; 3. Slider; 4. Tube body; 5. Lifting frame; 6. Mounting frame; 7. Lead screw; 8. Connecting frame; 9. Clamp; 10. Connecting shaft; 11. Electric control valve; 12. Support frame; 13. Mounting hole; 14. Electric push rod; 15. Linear motor; 16. Ultrasonic probe. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Reference Figures 1-4 This utility model provides a test device for the wear resistance of oil pipe coating, including a test body 1. The test body 1 is equipped with a solution tank for holding the test solution, two water pumps for driving the solution to flow, a motor for external power output, and a sensor for monitoring the solution temperature and flow rate. All of the above are set inside the test body 1 and are not shown in the attached drawings. They are only used as driving components to realize the flow of solution. The position of the components can be set according to actual needs, which will not be described in detail here. Two sliders 3 are slidably connected to the bottom inner wall of the test body 1. The two sliders 3 move towards each other through a drive component. The top of the two sliders 3 is fixed with a connecting frame 8 by bolts. A clamp 9 is fixed to one side of the connecting frame 8 by bolts. A tube 4 is clamped between the two clamps 9. The inner diameter of the tube 4 is not greater than the central flow hole of the clamp 9, and the outer diameter of the tube 4 is not less than the central flow hole of the clamp 9. A connecting hose 2 connected to the water pump inside the test body 1 is provided on the opposite sides of the two connecting frames 8. When it is necessary to test the coating inside the tube 4, the tube 4 is placed between the two clamps 9, and the slider 3 is driven by the drive component to move in opposite directions, so that the two clamps 9 clamp the tube 4, thereby fixing the tube 4. Then, two water pumps are started to drive the solution to flow through the pipe 4, simulating the process of oil rubbing against the inner surface coating. During this process, the flow rate of the solution in the pipe 4 can be controlled by adjusting the operating intensity of the water pumps. The sensor can monitor the temperature change and actual flow rate data of the solution as it flows through the pipe 4 in real time and feed this information back to the control system of the equipment. After continuous rinsing for a set period of time, the water pump is turned off to stop the flow of the solution. The wear degree of the inner surface coating can be detected, and the change in coating thickness can be tested to evaluate the wear resistance of the oil pipe coating. It can accurately simulate the fluid erosion conditions experienced by oil pipes in actual working environments, and achieve quantitative evaluation of the wear resistance of different coating materials by controlling key parameters such as solution flow rate and temperature.

[0021] In this utility model, the driving component includes two lead screws 7 rotating on the inner wall of the bottom of the test body 1. Both lead screws 7 are threadedly connected to the slider 3 through a threaded cylinder. A connecting shaft 10 is fixed between the two lead screws 7 through a coupling. The two lead screws 7 are symmetrically distributed. One of the lead screws 7 is driven by a motor inside the test body 1 through a pulley and a belt. When the position of slider 3 needs to be adjusted, the motor is started. The motor drives one of the lead screws 7 to rotate through the pulley and belt. The lead screw 7 drives the other lead screw 7 to rotate synchronously through the connecting shaft 10. Since the two lead screws 7 are symmetrically distributed and have opposite thread directions, the threaded cylinder connected to the lead screw 7 will drive slider 3 to move towards or away from each other on the bottom inner wall of the test body 1. Then, the distance between the two clamps 9 can be adjusted through the connecting frame 8 to adapt to the clamping requirements of tubes 4 of different lengths. During the movement of slider 3, the sliding connection structure between its bottom and the inner wall of the test body 1 ensures the smoothness of the movement and avoids affecting the fixing accuracy of tube 4 due to shaking, thereby ensuring the accuracy of subsequent solution flushing tests.

[0022] It should be noted that the inner wall of the threaded cylinder has an axially arranged annular groove, into which a nylon 66 damping ring with a Shore hardness of 85A is embedded. The continuous axial clamping force generated by its elastic deformation forms a 15°-20° helix angle interference fit with the surface of the lead screw 7. When the threaded pair is subjected to axial vibration load, the nylon insert can generate a maximum elastic compression of 0.3mm, which increases the friction coefficient between the thread contact surfaces from 0.15 to 0.68 (tested according to ASTM D1894 standard), effectively suppressing loosening displacement caused by thread springback.

[0023] Furthermore, a mounting bracket 6 is fixed to the bottom inner wall of the test body 1 by bolts. A linear motor 15 is provided on one side of the mounting bracket 6. An ultrasonic probe 16 is provided on the side of the linear motor 15 facing the tube body 4. The ultrasonic probe 16 is tilted, and its tilt angle can be precisely adjusted within the range of 15° to 45° by adjusting the knob on the mounting bracket 6 to ensure that the ultrasonic beam can be vertically incident on the coating area of ​​the inner surface of the tube body 4. The linear motor 15 can drive the ultrasonic probe 16 to reciprocate at a constant speed along the axial direction of the tube 4, thereby realizing continuous scanning detection of different positions of the coating on the inner surface of the tube 4. During the test, the high-frequency sound waves emitted by the ultrasonic probe 16 penetrate the coating and are reflected at the interface between the coating and the substrate. After processing, the reflected signal can generate a coating thickness distribution curve in real time. When a local coating thickness change is detected to exceed the set threshold, the system will automatically mark the location and record the corresponding coordinate information, providing accurate data support for subsequent wear degree analysis. In addition, the ultrasonic probe 16 is a 20MHz high-frequency focusing probe that is connected to an external ultrasonic detector. Its sound wavelength can reach 0.075mm, and its spatial resolution is better than 0.1mm. It can capture micron-level wear marks on the coating surface. The probe front end is equipped with a replaceable wear-resistant ceramic protective film with a hardness of HRA85 or higher. While maintaining a constant coupling gap of 0.5mm with the inner surface of the tube body 4, it can withstand mechanical friction during long-term scanning and ensure no performance degradation after 200 hours of continuous operation.

[0024] Among them, an electric control valve 11 is provided between the connecting hose 2 and the connecting frame 8 to control the connection between the connecting hose 2 and the pipe body 4. The electric control valve 11 adopts an electromagnetic drive method, and the response time is no more than 0.05 seconds. It can achieve precise switching control through the equipment control system. Before the test begins, close the solenoid valve 11. After the tube body 4 is fixed and the relevant parameters are set, open the solenoid valve 11 to allow the solution to enter the tube body 4 smoothly. When the test is over or needs to be paused, the solenoid valve 11 can be closed quickly to prevent the solution from continuing to flow, so that the tube body 4 can be processed or the test conditions can be adjusted. The valve body of the electrically controlled valve 11 is made of stainless steel, which has good corrosion resistance and can adapt to the chemical properties that the test solution may have. Its internal seals are made of fluororubber material to ensure that there will be no leakage during long-term use, thus ensuring the stability and safety of the test environment. Meanwhile, the electric control valve 11 also has a manual control mode. When the equipment control system malfunctions, the valve can be opened or closed manually, which improves the reliability and emergency response capability of the equipment.

[0025] Furthermore, a lifting frame 5 is slidably connected to the bottom inner wall of the test body 1. The top of the lifting frame 5 is provided with multiple symmetrically distributed mounting holes 13. A support frame 12 is provided in two mounting holes 13 located in the same row. The top of the support frame 12 is V-shaped. An electric push rod 14 that drives the lifting frame 5 to rise and fall is fixed to the bottom inner wall of the test body 1 by bolts. When the tube body 4 is installed, start the electric push rod 14 to drive the lifting frame 5 to rise. At this time, the tube body 4 can be placed on the top of the V-shape of the support frame 12 to provide bottom support for the tube body 4 and ensure that the central axis of the tube body 4 is coaxial with the central flow hole of the clamp 9. After the tube body 4 is fixed by the clamp 9, the electric push rod 14 drives the lifting frame 5 to descend, so that the support frame 12 is separated from the tube body 4, preventing the support frame 12 from generating additional support force on the tube body 4 during the solution flow test and affecting the test results. The multiple mounting holes 13 allow for flexible adjustment of the position of the support frame 12 according to the length and diameter of the tube 4, in order to meet the support requirements of tubes 4 of different specifications. The V-shaped top design can better fit the outer wall of the tube 4 and improve the stability of the support. The sliding connection structure of the lifting frame 5, combined with the driving method of the electric push rod 14, enables precise adjustment of the support height, with a lifting accuracy of up to 0.1mm, ensuring reliable auxiliary support for the tube 4 under different testing scenarios; It should be noted that in this application, the electric push rod 14 can be used in conjunction with a magnetic switch, a proximity switch or a photoelectric switch to achieve precise control of the push rod's extension and retraction displacement; the motor and the linear motor 15 are both existing technologies, and those skilled in the art can set them according to actual needs, which will not be elaborated here.

[0026] The working principle of this utility model: Start the electric push rod 14 to drive the lifting frame 5 to rise. At this time, the tube body 4 can be placed on the V-shaped top of the support frame 12 to provide bottom support for the tube body 4. The tube body 4 is placed on the support frame 12. The motor is started, and the motor drives one of the lead screws 7 to rotate through the pulley and belt. The lead screw 7 drives the other lead screw 7 to rotate synchronously through the connecting shaft 10. Since the two lead screws 7 are symmetrically distributed and have opposite thread directions, the threaded cylinder connected to the lead screw 7 will drive the slider 3 to move towards each other on the bottom inner wall of the test body 1. Then, the distance between the two clamps 9 is adjusted by the connecting frame 8 to achieve clamping of the tube body 4. The electric push rod 14 drives the lifting frame 5 to descend, causing the support frame 12 to separate from the tube body 4; Two water pumps are started to drive the solution to flow through the pipe 4, simulating the process of oil rubbing against the inner surface coating. During this process, the flow rate of the solution in the pipe 4 can be controlled by adjusting the operating intensity of the water pumps. The sensor can monitor the temperature change and actual flow rate data of the solution as it flows through the pipe 4 in real time and feed this information back to the control system of the equipment. After a set period of continuous rinsing, the water pump is turned off to stop the solution flow, and the wear degree of the inner surface coating can be detected. The ultrasonic probe 16 is driven by the linear motor 15 to reciprocate at a constant speed along the axial direction of the pipe body 4, thereby realizing continuous scanning and detection of the coating at different positions on the inner surface of the pipe body 4, testing the coating thickness change, etc., and thus evaluating the wear resistance performance of the oil pipe coating. It can accurately simulate the fluid erosion conditions experienced by oil pipes in actual working environments, and achieve quantitative evaluation of the wear resistance of different coating materials by controlling key parameters such as solution flow rate and temperature.

[0027] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change. The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs. The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A test device for the wear resistance of oil pipe coatings, comprising a test body (1), characterized in that: The bottom inner wall of the test body (1) has two sliders (3) that are slidably connected, and the two sliders (3) move towards each other through a drive component; The top of the two sliders (3) is fixedly connected to a connecting frame (8), and a clamp (9) is fixedly connected to one side of the connecting frame (8). The two clamps (9) hold a tube (4), and the inner diameter of the tube (4) is not greater than the central flow hole of the clamp (9). The opposite sides of the two connecting frames (8) are provided with connecting hoses (2) that are connected to the water pump in the test body (1).

2. The oil pipe coating wear resistance testing equipment according to claim 1, characterized in that: The drive assembly includes two lead screws (7) that rotate on the inner wall of the bottom of the test body (1). Both lead screws (7) are connected to the slider (3) by a threaded cylinder. A connecting shaft (10) is fixed between the two lead screws (7) by a coupling.

3. The oil pipe coating wear resistance testing equipment according to claim 2, characterized in that: The two lead screws (7) are symmetrically distributed.

4. The oil pipe coating wear resistance testing equipment according to claim 2, characterized in that: One of the lead screws (7) is driven by a motor inside the test body (1) via a pulley and a belt.

5. The oil pipe coating wear resistance testing equipment according to claim 1, characterized in that: The bottom inner wall of the test body (1) is fixedly connected to a mounting bracket (6), a linear motor (15) is provided on one side of the mounting bracket (6), and an ultrasonic probe (16) is provided on the side of the linear motor (15) facing the tube body (4).

6. The oil pipe coating wear resistance testing equipment according to claim 5, characterized in that: The ultrasonic probe (16) is tilted.

7. The oil pipe coating wear resistance testing equipment according to claim 1, characterized in that: An electric control valve (11) is provided between the connecting hose (2) and the connecting frame (8) to control the connection between the connecting hose (2) and the pipe body (4).

8. The oil pipe coating wear resistance testing equipment according to claim 1, characterized in that: The bottom inner wall of the test body (1) is slidably connected to a lifting frame (5). The top of the lifting frame (5) is provided with multiple symmetrically distributed mounting holes (13). A support frame (12) is provided in two mounting holes (13) in the same column. An electric push rod (14) that drives the lifting frame (5) to rise and fall is fixedly connected to the bottom inner wall of the test body (1).

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