A device and method for testing the adhesion performance of a corrosion protection coating

Abstract

The application provides a kind of anticorrosive coating adhesion performance testing device and method, including three star frame, puller and distance adjusting assembly, the middle part of the top end of three star frame is equipped with cylinder, the telescopic rod end of cylinder is fixedly installed puller, three star frame 3 end portions are all installed distance adjusting assembly, the fixed cylinder of distance adjusting assembly is fixed in three star frame bottom end, inner cylinder is slidably sleeved in the inside of fixed cylinder, inner thread is arranged on the inner wall of inner cylinder and is screwed with screw rod, outer cylinder is slidably sleeved on the bottom of fixed cylinder, outer cylinder bottom end is connected with spherical base, the through slot is formed in the side of fixed cylinder along axis, emergency stop assembly is arranged in the inside of through slot, when inner cylinder moves downwards to the inner bottom of outer cylinder, emergency stop assembly automatically stops and terminates stroke;The application realizes quick automatic positioning by three star frame and 3 distance adjusting assemblies, spherical base can automatically adjust angle to realize full adhesion with the surface to be measured, three distance adjusting assemblies can independently adjust different height, ensure that puller and test column always keep vertical, improve the accuracy of test data.

Description

Technical Field

[0001] This invention relates to the field of anti-corrosion coating technology, and more specifically to a device and method for testing the adhesion performance of anti-corrosion coatings. Background Technology

[0002] As an important means of surface protection for metal components, the adhesion of anti-corrosion coatings is a key indicator for evaluating coating quality and performance. Currently, in engineering practice, methods such as pull-out test, cross-cut test, X-cut test, indentation test, and bending test are mainly used for testing. Among them, the pull-out test uses a special instrument to measure the stress value when the coating is pulled off to quantitatively evaluate the adhesion. The cross-cut test and X-cut test evaluate the adhesion by making specific patterned scratches on the coating surface and observing the coating peeling. The indentation test uses an indenter to apply a load to the coating surface and observes the coating failure morphology for analysis. The bending test determines the adhesion by bending the coated sample to check for cracking and peeling of the coating. These methods have their own characteristics and play a role in different application scenarios. Among the above methods, the pull-out test has the highest accuracy.

[0003] Chinese patent document (publication number: CN111751213A) discloses a coating tensile stiffness and adhesion testing device, belonging to the field of measurement technology. This device includes a screw, a screw handle, a rotating groove, a tension rod, a protective shell, a spherical slot, a coating adhesive head, an FBG optical fiber, a Fabry-Perot optical fiber, a reflector, a height-adjustable bracket, an optical fiber protective shell, fixing bolts, an instrument housing, and connectors. Based on the principle of fiber optic sensing, this device uses an optical fiber sensor to simultaneously and accurately test the tensile stiffness and adhesion of the coating, thus accurately reflecting the properties of the coating material.

[0004] In existing technologies, when using the pull-out method to test the adhesion of anti-corrosion coatings on slopes or uneven surfaces, it is difficult to ensure the perpendicularity of the pull-out device to the test head, resulting in insufficient accuracy of the test data. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a device and method for testing the adhesion performance of anti-corrosion coatings. By using a three-star frame in conjunction with three adjustable components, rapid automatic positioning is achieved, ensuring the perpendicularity of the puller and the test head and improving the accuracy of data detection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A device for testing the adhesion performance of anti-corrosion coatings includes a three-star frame and a puller for pulling out test columns. A cylinder is installed at the top center of the three-star frame, and the puller is fixedly installed at the end of the cylinder's telescopic rod. The bottom of the puller is connected to the test column. The three ends of the three-star frame are arranged in an array, and each end of the three-star frame is equipped with an adjustment component. The adjustment component includes a motor and a fixed cylinder. The fixed cylinder is fixed at the bottom end of the three-star frame. An inner cylinder is slidably fitted inside the fixed cylinder. The inner wall of the inner cylinder is provided with internal threads and screwed with a screw rod. The upper end of the screw rod passes through the three-star frame and is connected to the motor. An outer cylinder is slidably fitted at the bottom of the fixed cylinder. A spherical base is connected to the bottom end of the outer cylinder. A second limiting ring is provided at the top of the outer cylinder. A first limiting ring is provided at the top of the fixed cylinder. A spring is installed between the first limiting ring and the second limiting ring. A through groove is opened along the axis on one side of the fixed cylinder, which connects the inner cylinder and the outer cylinder. An emergency stop component is provided inside the through groove. When the inner cylinder moves downward to the bottom of the outer cylinder, the emergency stop component automatically stops the stroke.

[0008] As a preferred technical solution of the present invention, the emergency stop assembly includes an emergency stop switch and a contact block. The emergency stop switch is fixedly installed on the outer wall of the inner cylinder, and a wire is connected inside the emergency stop switch. The wire extends through a wire hole to the motor for electrical connection. The contact block is fixedly installed on the inner wall of the outer cylinder. Both the emergency stop switch and the contact block are located inside the through groove and can move. When the contact block abuts against the emergency stop switch, the motor is de-energized and stops running.

[0009] As a preferred embodiment of the present invention, the emergency stop switch includes a hollow cavity body and a compression spring. An opening is provided on one side of the hollow cavity body, and a contact tongue is slidably installed at the opening. A compression spring is installed on the side of the contact tongue away from the opening. A second electrode plate is installed on the top of the contact tongue. A first electrode plate is installed inside the hollow cavity body. The first electrode plate and the second electrode plate are respectively connected to two branches of a wire. When the contact block compresses the contact tongue, the first electrode plate and the second electrode plate separate to form an open circuit.

[0010] As a preferred embodiment of the present invention, the puller includes a symmetrically arranged cavity structure, the cavity structure including an upper support plate, a lower support plate, and a vertical plate, and a force sensor is arranged between the upper support plate and the lower support plate; telescopic grooves are provided on both sides of the lower cavity structure, and a pressure plate is slidably installed inside the telescopic groove through a protrusion, and a return spring is installed at the bottom of the protrusion; an eccentric cam is provided on the top of the pressure plate, and the eccentric cam is installed on the vertical plates on both sides through a rotating rod, one end of the rotating rod extending to the outside to connect to a handle.

[0011] As a preferred technical solution of the present invention, the distance from the outer bottom of the inner cylinder to the inner bottom of the outer cylinder is set as A, and the distance between the emergency stop switch and the contact block is set as B, wherein the distance A is equal to the distance B.

[0012] As a preferred technical solution of the present invention, one end of the wire hole is connected to the through slot, and the other end extends upward to the top of the three-star frame. A winding reel is provided at the top of the three-star frame. The wire passes through the wire hole and is electrically connected to the emergency stop switch and the motor. The middle part of the wire is installed on the winding reel, and the winding reel adjusts the winding and unwinding of the wire.

[0013] As a preferred technical solution of the present invention, the spherical base includes a ball head and a ball socket. The ball head is the upper part of the spherical base, and the ball socket is a groove that matches the ball head. The ball head can rotate freely in the ball socket. The ball head is welded to the bottom of the outer cylinder through a connecting column, and the bottom end of the ball socket is provided with anti-slip texture.

[0014] As a preferred technical solution of the present invention, the inner wall of the outer cylinder is provided with a guide groove along the axis, and a guide slide rod is fixedly provided on the outer wall of the fixed cylinder, the guide slide rod sliding in the guide groove; the bottom of the spring is fixedly connected to a second limiting ring, and the top of the spring is fixedly connected to a first limiting ring.

[0015] As a preferred technical solution of the present invention, a limiting groove is formed on the inner wall of the fixed cylinder along the axis, and a limiting slide rod is fixed on the outer wall of the inner cylinder, the limiting slide rod sliding in the limiting groove.

[0016] As a preferred technical solution of the present invention, the testing method using the above-mentioned apparatus includes the following steps:

[0017] S1. The bottom of the lower disc of the test column is vertically fixed to the coating to be tested using adhesive.

[0018] S2. Place the test device above the test column, with the spherical bases of the three adjustment components abutting against the plane to be tested, and press down on the three-star frame to compress the three springs to a certain extent.

[0019] S3. Insert the upper disc of the test column into the U-shaped groove at the bottom of the puller, and turn the handle to drive the eccentric cam to press the pressure plate, so that the pressure plate, the upper disc of the test column and the bottom of the puller are completely in contact; the three adjustable components can independently adjust different heights, and the spherical base can automatically adjust the angle to achieve full contact with the surface to be tested, ensuring that the puller and the test column always remain perpendicular, and improving the accuracy of the test data;

[0020] S4. Start the three motors to drive the screw to rotate, causing the inner cylinder to move downwards until:

[0021] The bottom of the inner cylinder abuts against the bottom of the outer cylinder, and at the same time, the contact block abuts against the emergency stop switch, causing the motor to automatically cut off the power; at this time, the bottom of the inner cylinder abuts against the bottom of the outer cylinder to form a stable force transmission structure;

[0022] S5. Start the cylinder and stretch vertically at a rate of 0.1-10 mm / min until the coating is damaged, and collect data through a force sensor.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. In this invention, a cylinder is installed at the center of the top of a three-star frame with equal angles. A puller is connected to the end of the cylinder. Adjustment components are installed at the three ends of the three-star frame. The motor of the adjustment component is fixed on the three-star frame. A screw is installed at the output end of the motor. An inner cylinder is screwed to the outside of the screw. A fixed cylinder is slidably fitted on the outer circumference of the inner cylinder. The fixed cylinder is fixedly installed on the three-star frame. An outer cylinder is slidably fitted on the bottom of the outer circumference of the fixed cylinder. A spring is installed between the outer cylinder and the fixed cylinder. The outer cylinder slides on the fixed cylinder and cooperates with the spring to achieve self-adjustment of the height difference of the test surface. Then, the screw is driven by the motor to achieve downward displacement, so that the bottom of the outer cylinder abuts against the bottom of the inner cylinder to form a stable force transmission structure. When the cylinder is stretched, the three adjustment components maintain stable support for the three-star frame. The device can adapt to different slopes and uneven test surfaces, ensuring that the puller and the test column remain perpendicular, thus improving the accuracy of the test data.

[0025] 2. In this invention, the distance from the outer bottom of the inner cylinder to the inner bottom of the outer cylinder is set as A, and the distance between the emergency stop switch and the contact block is set as B, so that distance A is equal to distance B. When the contact block abuts against the emergency stop switch, the outer bottom of the inner cylinder abuts against the inner bottom of the outer cylinder, and the inner cylinder forms a stable force transmission structure to the bottom. By setting distances A and B to be equal, when the outer cylinder is at different heights on the fixed cylinder (i.e., when the outer cylinder is at different slopes of the measured surface), the inner bottom of the outer cylinder finally abuts against the outer bottom of the inner cylinder. At the same time, the contact block abuts against the emergency stop switch to stop the motor from running, terminate the screw's downward drive to the inner cylinder, and make both the inner and outer cylinders in a stable force transmission position, which is conducive to the smooth stretching of the cylinder.

[0026] 3. The puller of this invention adopts a symmetrical cavity structure with a force sensor inside. The lower part is equipped with a pressure plate and an eccentric cam mechanism. The eccentric cam is rotated by the handle to squeeze the pressure plate, so that the pressure plate is completely in contact with the disc on the test column and the top of the puller, ensuring that the puller and the test column remain perpendicular. This design uses the puller as a reference surface for measuring perpendicularity, which is conducive to the adjustment of the sliding position on the fixed cylinder by the outer cylinder and the spring. For different height differences of the tested surface, it can achieve preliminary, fast and accurate positioning.

[0027] 4. The spherical base of this invention adopts a ball-head and ball-and-socket structure, enabling automatic adjustment at multiple angles. When the coating surface is uneven, it can automatically adjust the angle to achieve full fit, increasing the force-bearing area and friction, and improving the stability of the testing device. The spherical base is made of GCr15 bearing steel, which has high hardness and an appropriate coefficient of friction, ensuring reliability during the testing process. Attached Figure Description

[0028] Figure 1This is a three-dimensional schematic diagram of the overall installation structure of the testing device of the present invention;

[0029] Figure 2 This is a three-dimensional structural diagram of the puller of the testing device of the present invention;

[0030] Figure 3 This is a three-dimensional cross-sectional view of the distance adjustment component of the testing device of the present invention during the distance adjustment process.

[0031] Figure 4 This is a three-dimensional cross-sectional view of the distance adjustment component of the testing device of the present invention in the distance adjustment completed state;

[0032] Figure 5 This is a three-dimensional schematic diagram of the disassembled structure of the distance adjustment component of the testing device of the present invention;

[0033] Figure 6 This is a three-dimensional cross-sectional view of the emergency stop switch structure of the testing device of the present invention;

[0034] In the diagram: Samsung frame-11; Puller-12; Adjustable distance assembly-13; Force sensor-14; Spherical base-15; Cylinder-16; Motor-17; Winding reel-18; Wire hole-19; Motor switch-20; Lower support plate-21; Vertical plate-22; Pressure plate-23; Upper support plate-24; Protrusion-25; Return spring-26; Eccentric cam-27; Handle-28; Fixing cylinder-29; First limiting ring - 30; Second limiting ring - 31; Spring - 32; Outer cylinder - 33; Inner cylinder - 34; Screw - 35; Through groove - 36; Emergency stop switch - 37; Contact block - 38; Wire - 39; Guide slide groove - 40; Guide slide rod - 41; Limiting slide groove - 42; Limiting slide rod - 43; Contact tongue - 44; Compression spring - 45; First electrode plate - 46; Second electrode plate - 47; Test column - 48. Detailed Implementation

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

[0036] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] Figures 1-6 As shown, a device for testing the adhesion performance of an anti-corrosion coating includes a three-star frame 11 and a puller 12 for pulling out a test column 48. A cylinder 16 is installed at the top center of the three-star frame 11, and the puller 12 is fixedly installed at the end of the telescopic rod of the cylinder 16. The bottom of the puller 12 is connected to the test column 48. The three ends of the three-star frame 11 are arranged in an array, and each end of the three-star frame 11 is equipped with an adjusting assembly 13. The adjusting assembly 13 includes a motor 17 and a fixed cylinder 29. The fixed cylinder 29 is fixed to the bottom end of the three-star frame 11, and an inner cylinder 34 is slidably fitted inside the fixed cylinder 29. The inner wall of the inner cylinder 34 is provided with internal threads and screwed with a... The upper end of the screw 35 passes through the three-star frame 11 and is connected to the motor 17. The bottom of the fixed cylinder 29 is slidably fitted with an outer cylinder 33. The bottom end of the outer cylinder 33 is connected to a spherical base 15. The top of the outer cylinder 33 is provided with a second limiting ring 31. The upper part of the fixed cylinder 29 is provided with a first limiting ring 30. A spring 32 is installed between the first limiting ring 30 and the second limiting ring 31. A through groove 36 is opened on one side of the fixed cylinder 29 along the axis. The through groove 36 connects the inner cylinder 34 and the outer cylinder 33. An emergency stop component is provided inside the through groove 36. When the inner cylinder 34 moves downward to the bottom of the outer cylinder 33, the emergency stop component automatically stops the machine and terminates the stroke.

[0038] Among them, a motor switch 20 is set on the Samsung frame 11. The motor switch 20 controls the start, stop and forward / reverse rotation of the motor 17. In this invention, the three motors 17 drive the three screws 35 to rotate, causing the inner cylinder 34 to be displaced. The displacement values ​​generated by the three inner cylinders 34 may be different. Independent control switches are used for the three motors 17 to facilitate their reset after operation.

[0039] This testing instrument is equipped with a main unit, a puller 12 connected to the main unit, and transmits the data from the force sensor 14 to the main unit for collection and processing; an external air pipe is connected to the cylinder 16 to adjust the extension and retraction pressure of the cylinder 16; the motor 17 is connected to an external power supply, and the motor 17 and the motor switch 20 are electrically connected to the power supply.

[0040] In general, when using an adhesion testing device, the bottom of the test column 48 is first vertically and tightly connected to the coating to be tested using adhesive. Then, the bottom of the puller 12 is snapped in place using a U-shaped opening. The top of the puller 12 is then fixedly connected to the end of the telescopic cylinder 16. The support foot of the tester is set to abut against the surface to be tested. The contraction force of the cylinder 16 is adjusted to slowly stretch the coating, causing the test column 48 to separate from the coating to be tested. The instantaneous data of the cylinder 16 is recorded, which is the measured value of the coating adhesion.

[0041] During use, the puller 12 should be kept perpendicular to the test column to obtain more accurate test data. The test column 48 adopts an I-shaped structure, consisting of upper and lower discs, which are fixedly connected by a column.

[0042] The testing device of this invention is applicable to planes with a certain slope or planes with uneven edges. In use, firstly, the bottom of the test column 48 is vertically and tightly connected to the coating to be tested using adhesive. Secondly, the device is placed above the test column 48, so that the adjusting component 13 contacts the plane to be tested to form a compression. Next, the upper disc of the test column 48 is inserted into the U-shaped groove at the bottom of the puller 12. Then, the handle 28 is adjusted to rotate the eccentric cam 27 to compress the pressure plate 23. The pressure plate 23 compresses the top of the upper disc, so that the puller 12 and the test column 48 are completely in contact. At this time, the puller 12 and the test column 48 are both perpendicular to the plane of the coating to be tested. Then, the three motors 17 are started, which drive the three screws 35 to rotate, causing the inner cylinder 34 to move towards the bottom of the outer cylinder 33. The bottom of the inner cylinder 34 abuts against the inner bottom of the outer cylinder 33. At the same time, the contact block 38 abuts against the emergency stop switch 37 to disconnect the power supply of the motor 17. Finally, the cylinder 16 is started to stretch, and the measurement data is collected.

[0043] The testing device of this invention can adapt to different slopes or uneven surfaces. In use, the outer cylinder 33 and the spring 32 cooperate to initially position the device, and then the screw 35 drives the inner cylinder 34 to abut against the inner bottom of the outer cylinder 33. When the cylinder 16 is activated to stretch the device, the inner cylinder 34 and the outer cylinder 33 abut against the spherical base 15 and the coating surface to be tested, realizing automatic adjustment for different flatnesses. The three adjustment components can each adapt to different distances, ensuring that the puller 12 and the test column 48 are perpendicular to the coating surface to be tested, further ensuring the accuracy of the measured data.

[0044] Furthermore, the emergency stop assembly includes an emergency stop switch 37 and a contact block 38. The emergency stop switch 37 is fixedly installed on the outer wall of the inner cylinder 34, and a wire 39 is connected inside the emergency stop switch 37. The wire 39 extends through the wire hole 19 to the motor 17 for electrical connection. The contact block 38 is fixedly installed on the inner wall of the outer cylinder 33. Both the emergency stop switch 37 and the contact block 38 are located inside the through groove 36 and can move. When the contact block 38 abuts against the emergency stop switch 37, the motor 17 is de-energized and stops running. Furthermore, the emergency stop switch 37 includes a hollow cavity body and a compression spring 45. An opening is provided on one side of the hollow cavity body, and a contact tongue 44 is slidably installed at the opening. The compression spring 45 is installed on the side of the contact tongue 44 away from the opening. A second electrode plate 47 is installed on the top of the contact tongue 44. A first electrode plate 46 is installed inside the hollow cavity body. The first electrode plate 46 and the second electrode plate 47 are respectively connected to two branches of the wire 39. When the contact block 38 compresses the contact tongue 44 to move, the first electrode plate 46 and the second electrode plate 47 separate to form an open circuit.

[0045] Figure 6 As shown, in the initial state, the first electrode plate 46 and the second electrode plate 47 are in contact, and the power supply line of the motor 17 is connected. The operation of the motor 17 can be controlled by the motor switch 20. When the inner cylinder 34 moves downward to the bottom of the outer cylinder 33, the contact block 38 abuts against the emergency stop switch 37 and compresses the contact tongue 44 to generate displacement. At this time, the second electrode plate 47 moves with the contact tongue 44 and moves away from the first electrode plate 46. The two electrode plates separate to form an open circuit, causing the motor 17 to stop running without power. The screw 35 remains in the position when the power is off. When the puller 12 releases the tension limit with the test column 48, the spring 32 resets, driving the outer cylinder 33 to move away from the motor 17. The contact block 38 releases its contact with the emergency stop switch 37, and the contact tongue 44 moves towards the opening direction under the action of the compression spring 45, so that the second electrode plate 47 and the first electrode plate 46 re-contact, and the circuit is restored. At this time, the screw 35 can be controlled to rotate by the motor switch 20.

[0046] Furthermore, the puller 12 includes a symmetrically arranged cavity structure, which includes an upper support plate 21, a lower support plate 24, and a vertical plate 22. A force sensor 14 is arranged between the upper support plate 21 and the lower support plate 24. Telescopic grooves are provided on both sides of the lower cavity structure. A pressure plate 23 is slidably installed inside the telescopic groove through a protrusion 25. A return spring 26 is installed at the bottom of the protrusion. An eccentric cam 27 is provided on the top of the pressure plate 23. The eccentric cam 27 is installed on the vertical plates 22 on both sides through a rotating rod. One end of the rotating rod extends to an external connecting handle 28.

[0047] Figure 2 As shown, the upper and lower ends of the force sensor 14 are symmetrically arranged to ensure that the tension at both ends of the force sensor 14 is balanced, and the test data is more accurate.

[0048] The lower cavity structure is equipped with a pressure plate 23 and an eccentric cam 27. When the upper disc of the test column 48 is engaged into the U-shaped groove at the bottom of the puller 12, the handle 28 is adjusted to make the eccentric cam 27 rotate and press the pressure plate 23. The pressure plate 23 presses the top of the upper disc, so that the pressure plate 23, the bottom of the puller 12 and the upper disc of the test column 48 are completely in contact. At this time, the puller 12 and the test column 48 are both perpendicular to the plane of the coating to be tested, and the pressure plate 23 limits the upper disc of the test column 48.

[0049] Both the puller 12 and the test column 48 are always kept perpendicular to the plane of the coating being tested, which facilitates the adjustment of the expansion and contraction of the three outer cylinders 33 and the further adjustment of the expansion and contraction of the inner cylinder 34 to form a stable state.

[0050] Furthermore, the distance from the outer bottom of the inner cylinder 34 to the inner bottom of the outer cylinder 33 is set as A, and the distance between the emergency stop switch 37 and the contact block 38 is set as B, wherein the distance A is equal to the distance B.

[0051] Figure 4 As shown, when the emergency stop switch 37 abuts against the contact block 38, the bottom end of the inner cylinder 34 abuts against the inner bottom of the outer cylinder 33, forming a stable state; Figure 3 As shown, by setting distances A and B to be equal, when the inner cylinder 34 is at the upper end, the outer cylinder 33 can adjust the amount of expansion and contraction according to the height of the coating surface being measured, and the inner cylinder 34 automatically fills in to form a stable support; the three outer cylinders 33 can be adjusted to different heights, which enhances the applicability of this device.

[0052] Furthermore, one end of the wire hole 19 is connected to the through slot 36, and the other end extends upward to the top of the three-star frame 11. A winding reel 18 is provided on the top of the three-star frame 11. The wire 39 is electrically connected to the emergency stop switch 37 and the motor 17 through the wire hole 19. The middle part of the wire 39 is installed on the winding reel 18, and the winding reel 18 adjusts the winding and unwinding of the wire 39.

[0053] It should be noted that a central shaft is installed inside the reel, and a spring box is installed inside the central shaft. The spring box is used to reset the central shaft, and a winding wheel is fixedly installed on the outer periphery of the central shaft. The reel is used to wind the middle of the conductor 39. When an external force pulls the conductor 39, the reel rotates to send the conductor 39 out. When no external force pulls the conductor, the reel rotates back to retract and tighten the outer conductor 39. In this device, the conductor 39 is in a taut state when it moves with the emergency stop switch 37, and there will be no tangling or knotting.

[0054] Furthermore, the spherical base 15 includes a ball head and a ball socket. The ball head is the upper part of the spherical base, and the ball socket is a groove that matches the ball head. The ball head can rotate freely in the ball socket. The ball head is welded to the bottom of the outer cylinder 33 through a connecting post, and the bottom end of the ball socket is provided with anti-slip texture.

[0055] Figure 1 and Figure 3 As shown, the spherical base structure allows for multiple angle changes. Especially when the coating surface is uneven, the spherical structure can automatically adjust the angle to achieve full fit, increase the force-bearing area, and increase friction.

[0056] The adhesion of anti-corrosion coatings varies depending on the type of coating, ranging from 2 to 20 MPa.

[0057] The pressure that the spherical base can withstand depends on the material and the size of the sphere. In this invention, the spherical base is made of GCr15 bearing steel with a hardness of 58-62HRC, a surface roughness of Ra 0.4, and a static friction coefficient of 0.15-0.25 (steel-to-steel contact).

[0058] Furthermore, the inner wall of the outer cylinder 33 is provided with a guide groove 40 along the axis, and a guide rod 41 is fixed on the outer wall of the fixed cylinder 29. The guide rod 41 slides in the guide groove 40. The bottom of the spring 32 is fixedly connected to the second limiting ring 31, and the top of the spring 32 is fixedly connected to the first limiting ring 30.

[0059] Figure 5 As shown, the guide slide rod 41 and the guide slide groove 40 utilize axial sliding, and the spring 32 is used to adjust the extension and retraction of the outer cylinder 33. Both ends of the spring 32 are fixed to prevent the outer cylinder 33 from falling off the fixed cylinder 29.

[0060] Furthermore, a limiting groove 42 is formed on the inner wall of the fixed cylinder 29 along the axis, and a limiting slide rod 43 is fixed on the outer wall of the inner cylinder 34, and the limiting slide rod 43 slides in the limiting groove 42.

[0061] Figure 5 As shown, the limiting slide bar 43 and the limiting slide groove 42 are configured to facilitate the reciprocating motion of the inner cylinder 34 along the axial direction under the driving action of the screw 35.

[0062] The testing method using a testing apparatus includes the following steps:

[0063] S1. The bottom of the lower disc of the test column 48 is vertically fixed to the coating to be tested using adhesive.

[0064] S2. Place the test device above the test column 48. The spherical base 15 of the three adjustable components 13 abuts against the plane to be tested. Press down to make the three springs 32 generate a certain amount of compression. At the same time, the outer cylinder 33 has a displacement along the fixed cylinder 29 toward the motor 17.

[0065] S3. Insert the upper disc of the test column 48 into the U-shaped groove at the bottom of the puller 12, and rotate the handle 28 to drive the eccentric cam 27 to press the pressure plate 23, so that the pressure plate 23, the upper disc of the test column 48 and the bottom of the puller 12 are completely in contact; the three adjustable components 13 can be independently adjusted to different heights, and the spherical base 15 can automatically adjust the angle to achieve full contact with the surface to be tested, ensuring that the puller 12 and the test column 48 always remain perpendicular, and improving the accuracy of the test data;

[0066] S4. Start the three motors 17 to drive the screw 35 to rotate, causing the inner cylinder 34 to move downwards until:

[0067] The bottom of the inner cylinder 34 abuts against the inner bottom of the outer cylinder 33, and at the same time, the contact block 38 abuts against the emergency stop switch 37, causing the motor 17 to automatically cut off the power; at this time, the bottom of the inner cylinder 34 abuts against the inner bottom of the outer cylinder 33 to form a stable force transmission structure.

[0068] S5. Start cylinder 16 and perform vertical stretching at a rate of 0.1-10 mm / min until the coating is damaged, and collect data through a force sensor.

[0069] The present invention has been illustrated through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that all related improvements to the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A device for testing the adhesion performance of anti-corrosion coatings, comprising a three-star frame (11) and a puller (12) for a pull-out test column (48), characterized in that, A cylinder (16) is installed at the top center of the three-star frame (11). A puller (12) is fixedly installed at the end of the telescopic rod of the cylinder (16). The bottom of the puller (12) is connected to the test column (48). The three ends of the three-star frame (11) are arranged in an array. Each end of the three-star frame (11) is equipped with an adjustment component (13). The adjustment component (13) includes a motor (17) and a fixed cylinder (29). The fixed cylinder (29) is fixed to the bottom end of the three-star frame (11). The inner cylinder (34) is slidably sleeved inside the fixed cylinder (29). The inner wall of the inner cylinder (34) is provided with internal threads and screwed with a screw rod (35). The upper end of the screw rod (35) passes through the three-star frame (11) and is connected to the output end of the motor (17). The outer cylinder (33) is slidably sleeved on the bottom of the outer periphery of the fixed cylinder (29). The bottom end of the outer cylinder (33) is connected to a spherical base (15). The top of the outer cylinder (33) is provided with a second limiting ring (31). The upper part of the fixed cylinder (29) is provided with a first limiting ring (30). A spring (32) is installed between the first limiting ring (30) and the second limiting ring (31). A through groove (36) is opened on one side of the fixed cylinder (29) along the axis. The through groove (36) connects the inner cylinder (34) and the outer cylinder (33). An emergency stop component is installed inside the through groove (36). When the inner cylinder (34) moves downward to the bottom of the outer cylinder (33), the emergency stop component automatically stops and terminates the stroke.

2. The anti-corrosion coating adhesion performance testing device according to claim 1, characterized in that, The emergency stop assembly includes an emergency stop switch (37) and a contact block (38). The emergency stop switch (37) is fixedly installed on the outer wall of the inner cylinder (34). A wire (39) is connected inside the emergency stop switch (37). The wire (39) extends through the wire hole (19) to the motor (17) for electrical connection. The contact block (38) is fixedly installed on the inner wall of the outer cylinder (33). Both the emergency stop switch (37) and the contact block (38) are located inside the through groove (36) and move. When the contact block (38) abuts against the emergency stop switch (37), the motor (17) is de-energized and stops running.

3. The anti-corrosion coating adhesion performance testing device according to claim 2, characterized in that, The emergency stop switch (37) includes a hollow cavity body and a compression spring (45). An opening is provided on one side of the hollow cavity body, and a contact tongue (44) is slidably installed at the opening. The compression spring (45) is installed on the side of the contact tongue (44) away from the opening. A second electrode plate (47) is installed on the top of the contact tongue (44). A first electrode plate (46) is installed inside the hollow cavity body. The first electrode plate (46) and the second electrode plate (47) are respectively connected to two branches of the wire (39). When the contact block (38) compresses the contact tongue (44) to move, the first electrode plate (46) and the second electrode plate (47) separate to form an open circuit.

4. The anti-corrosion coating adhesion performance testing device according to claim 2, characterized in that, The puller (12) includes a cavity structure arranged symmetrically on the upper and lower sides. The cavity structure includes an upper support plate (21), a lower support plate (24), and a vertical plate (22). A force sensor (14) is arranged between the upper support plate (21) and the lower support plate (24). A telescopic groove is provided on both sides of the lower part of the cavity structure. A pressure plate (23) is slidably installed inside the telescopic groove through a protrusion (25). A reset spring (26) is installed at the bottom of the protrusion. An eccentric cam (27) is provided on the top of the pressure plate (23). The eccentric cam (27) is installed on the vertical plates (22) on both sides through a rotating rod. One end of the rotating rod extends to the external connecting handle (28).

5. The anti-corrosion coating adhesion performance testing device according to claim 2, characterized in that, The distance from the bottom of the inner cylinder (34) to the bottom of the outer cylinder (33) is set as A, and the distance between the emergency stop switch (37) and the contact block (38) is set as B. The distance A is equal to the distance B.

6. The anti-corrosion coating adhesion performance testing device according to claim 2, characterized in that, One end of the wire hole (19) is connected to the through slot (36), and the other end extends upward to the top of the three-star frame (11). A winding reel (18) is provided on the top of the three-star frame (11). The wire (39) is electrically connected to the emergency stop switch (37) and the motor (17) through the wire hole (19). The middle part of the wire (39) is installed on the winding reel (18). The winding reel (18) adjusts the winding and unwinding of the wire (39).

7. The anti-corrosion coating adhesion performance testing device according to claim 1, characterized in that, The spherical base (15) includes a ball head and a ball socket. The ball head is the upper part of the spherical base, and the ball socket is a groove that matches the ball head. The ball head can rotate freely in the ball socket. The ball head is welded to the bottom of the outer cylinder (33) through a connecting column, and the bottom of the ball socket is provided with anti-slip texture.

8. The anti-corrosion coating adhesion performance testing device according to claim 1, characterized in that, The inner wall of the outer cylinder (33) is provided with a guide groove (40) along the axis, and a guide rod (41) is fixed on the outer wall of the fixed cylinder (29). The guide rod (41) slides in the guide groove (40); the bottom of the spring (32) is fixedly connected to the second limiting ring (31), and the top of the spring (32) is fixedly connected to the first limiting ring (30).

9. The anti-corrosion coating adhesion performance testing device according to claim 1, characterized in that, The inner wall of the fixed cylinder (29) is provided with a limiting groove (42) along the axis, and a limiting rod (43) is fixed on the outer wall of the inner cylinder (34). The limiting rod (43) slides in the limiting groove (42).

10. A testing method using the apparatus according to any one of claims 1-9, characterized in that, Includes the following steps: S1. The bottom of the lower disk of the test column (48) is fixed vertically to the coating to be tested using adhesive. S2. Place the test device above the test column (48), and the spherical base (15) of the three adjustment components (13) abuts against the plane to be tested. Press down on the three-star frame (11) so that the three springs (32) all generate a certain amount of compression. S3. Insert the upper disc of the test column (48) into the U-shaped groove at the bottom of the puller (12), and rotate the handle (28) to drive the eccentric cam (27) to press the pressure plate (23), so that the pressure plate (23), the upper disc of the test column (48) and the bottom of the puller (12) are completely in contact; the three adjustable components (13) can be independently adjusted to different heights, and the spherical base (15) can automatically adjust the angle to achieve full contact with the surface to be tested, ensuring that the puller (12) and the test column (48) always remain perpendicular, and improving the accuracy of the test data; S4. Start the three motors (17) to drive the screw (35) to rotate, causing the inner cylinder (34) to move downward until: the bottom of the inner cylinder (34) abuts against the inner bottom of the outer cylinder (33), and at the same time the contact block (38) abuts against the emergency stop switch (37), causing the motor (17) to automatically cut off the power; at this time, the bottom of the inner cylinder (34) abuts against the inner bottom of the outer cylinder (33) to form a stable force transmission structure; S5. Start the cylinder (16) and stretch it vertically at a rate of 0.1-10 mm / min until the coating is damaged. Data is collected by the force sensor.

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