A water-based paint adhesion testing device

Abstract

The present invention relates to the field of coating detection technology, and in particular to a water-based coating adhesion detection device, comprising a workbench, a fixing unit and a detection unit; the existing detection method has the following problems: the plate to be tested cannot be limited and fixed, so the plate to be tested lacks stability and is easy to shake, thereby posing certain safety hazards; the operation steps are cumbersome, and there is a detection deviation in the adhesion detection of different coatings using the above detection method, which affects the detection accuracy; the present invention can simultaneously squeeze and limit multiple corners of the detection plate to prevent the detection plate from shaking and warping at will, so as to ensure the stability of the detection plate during the detection process; the present invention first applies corrosive liquid to the upper end of the detection plate, during which friction is generated between the straight scraper rod and the arc scraper rod and the corroded water-based coating, so that the water-based coating can be tested at one time in multiple stages to improve the detection accuracy of the water-based coating.

Description

Technical Field

[0001] The present invention relates to the technical field of coating detection, and in particular to a water-based coating adhesion detection device. Background Art

[0002] Water-based paint refers to paint that uses water as a solvent or dispersion medium. Water-based paint can be diluted with water during construction. Water-based paint includes three types: water-soluble paint, water-dilutable paint, and water-dispersible paint. The adhesion of water-based paint is one of the most important indicators in its application process. Therefore, the adhesion of water-based paint needs to be tested after production to ensure its later use effect.

[0003] At present, people mostly use the blade X-scratch method and the grid method to determine the adhesion of the coating. That is, use a blade to cut X-shaped lines or tic-tac-toe grid lines on the coating, then press the tape on the surface of the coating and tear off the tape within a certain period of time, and finally observe the shedding of the coating to determine the adhesion of the coating.

[0004] However, the above detection method still has the following problems: 1. Since the coating is relatively smooth, the above detection method requires the detection personnel to manually operate the blade, and the detection personnel cannot limit and fix the plate to be tested, so the plate to be tested lacks stability and is prone to shaking, which poses certain safety hazards.

[0005] 2. After the coating is cut, the tape is pressed on the plate to be tested, but the tape needs to be smoothed so that the contact area between the tape and the coating is the maximum, and finally the tape is torn off the plate to be tested. Therefore, the operation steps are cumbersome, and the adhesion of different types of coatings is different. Therefore, the results of adhesion test of different coatings using the above detection method are also different, resulting in detection deviation, which affects the detection accuracy. Summary of the invention

[0006] 1. Technical problems to be solved: The present invention provides a water-based paint adhesion detection device that can solve the problems pointed out in the above background technology.

[0007] 2. Technical solution: In order to achieve the above objectives, the present invention adopts the following technical solution: a water-based paint adhesion detection device, including a workbench, a fixing unit and a detection unit. The workbench is a horizontally placed rectangular structure, and support columns are arranged at the lower end of the workbench and near its four corners.

[0008] The fixed unit includes a limiting slide groove, a displacement block, a contraction spring, a connecting block, a support plate, a limiting assembly and an adjustment assembly, wherein: two sliding groups are provided at the upper end of the workbench, each sliding group includes two limiting slide grooves symmetrically arranged about the diagonal line of the upper surface of the workbench, a displacement block is slidingly arranged in the limiting slide groove, a contraction spring is installed on a side wall of the displacement block and the limiting slide groove away from the middle of the workbench, a support plate is provided at the upper end of the displacement block through the connecting block, a limiting assembly is provided on the support plate, and an adjustment assembly is installed between the workbench and the displacement block.

[0009] The detection unit includes a U-shaped frame, a fixed block, a positioning cylinder, a receiving frame, a linkage cylinder, an execution block, a driving motor, a storage barrel, a discharging assembly and a friction assembly, wherein: a U-shaped frame with an opening downward is installed at the upper end of the workbench, a fixed block is arranged between the U-shaped frame and the workbench, a positioning cylinder is installed at the lower end of the U-shaped frame, a linkage cylinder is arranged at the telescopic end of the positioning cylinder through the receiving frame, an execution block is rotatably docked at the lower end of the linkage cylinder, a driving motor is arranged at the upper end of the linkage cylinder through a motor seat, an output shaft of the driving motor is connected to the execution block, a storage barrel is installed at the lower end of the execution block, a plurality of through holes are evenly penetrated in the circumferential direction of the lower end of the storage barrel, and a discharging assembly and a friction assembly are installed at the lower end of the storage barrel.

[0010] As a preferred technical solution of the present invention, the limiting assembly includes a positioning column, a supporting plate, an L-shaped frame, an extension spring rod and an extrusion limiting block, wherein: the supporting plate is installed on the upper end of the supporting plate and on the side close to the middle of the workbench through the positioning column, the upper end of the supporting plate and on the side away from the middle of the workbench is provided with an L-shaped frame, the two side walls of the inner corner of the L-shaped frame and on the side close to the supporting plate are provided with extension spring rods, and the extrusion limiting block is installed on the side of the extension spring rod close to the supporting plate.

[0011] As a preferred technical solution of the present invention, the adjustment component includes a telescopic cylinder, a linkage plate, a positioning block, a roller, a fixed plate, a rotating shaft and a pull rope, wherein: a telescopic cylinder is arranged in the middle part of the lower end of the workbench, a linkage plate is installed at the telescopic end of the telescopic cylinder, a positioning block is arranged at the lower end of the displacement block, a notch is opened at the lower end of the positioning block, a roller is installed in the notch, two fixed plates are symmetrically arranged about the positioning block on one side of the lower end of the workbench close to the telescopic cylinder, a rotating shaft is rotatably arranged on the opposite sides of the two fixed plates, a plurality of pull ropes are evenly arranged on the outer wall of the linkage plate in a circumferential direction, the end of the pull rope away from the linkage plate is connected to the roller, and the middle part of the pull rope slides against the rotating shaft.

[0012] As a preferred technical solution of the present invention, the discharging assembly includes a material storage cavity, a discharge hole and a smear pad, wherein: the lower end of the material storage barrel is evenly circumferentially provided with a plurality of material storage cavities corresponding to the positions of the through holes, the material storage cavity is connected with the through holes, a plurality of discharge holes are opened at the lower end of the material storage cavity, and a smear pad is detachably installed at the lower end of the material storage cavity.

[0013] As a preferred technical solution of the present invention, the friction assembly includes a mounting block, a connecting plate and a straight scraper rod, wherein: the lower end of the storage barrel is circumferentially evenly provided with a plurality of mounting blocks staggered with the storage cavity, the lower end of the mounting block is provided with a connecting plate, the lower end of the connecting plate is provided with a straight scraper rod, and the straight scraper rod is arranged along the middle of the connecting plate close to the outer wall of the storage barrel to one side of the axis of the storage barrel.

[0014] As a preferred technical solution of the present invention, two arc groups are symmetrically arranged at the lower end of the connecting plate about the straight scraper rod, each arc group includes a plurality of arc scraper rods, and the plurality of arc scraper rods are arranged at equal intervals along the straight scraper rod.

[0015] As a preferred technical solution of the present invention, the cross-sections of the straight scraper rod and the arc-shaped scraper rod are both triangular structures, and the lower ends of the straight scraper rod and the arc-shaped scraper rod are flush.

[0016] As a preferred technical solution of the present invention, the extrusion limit block is located above the supporting plate, and the cross section of the extrusion limit block is a triangular structure.

[0017] 3. Beneficial effects: 1. The fixing unit provided by the present invention can squeeze and limit the corners of the detection plate through the extrusion limit block and the supporting plate to prevent the detection plate from shaking and warping at will, so as to ensure the stability of the detection plate during the detection process, and the extrusion limit block and the supporting plate can limit and fix the detection plates of different thicknesses.

[0018] 2. The detection unit provided by the present invention applies corrosive liquid on the upper end of the detection plate through a smear pad, so that the corrosive liquid corrodes the water-based paint. During this period, friction is generated between the straight scraper rod and the arc scraper rod and the corroded water-based paint, so that the water-based paint can be tested at one time in multiple stages to improve the detection accuracy of the water-based paint. In addition, the present invention can automatically detect the detection plate, thereby reducing safety hazards.

[0019] 3. The adjustment assembly provided by the present invention can reduce the distance between multiple support plates according to the length and width of the detection plate, so as to facilitate the limiting and fixing of detection plates of different sizes, and then detect different types of water-based coatings.

[0020] 4. The present invention generates friction between the straight scraper rod and the curved scraper rod and the corroded water-based paint. If the adhesion of the water-based paint is unqualified, the water-based paint on the upper end of the test plate is prone to large-scale scratches and falling off under the action of the straight scraper rod, and the test plate is prone to arc-shaped scratches under the action of the curved scraper rod, thereby facilitating intuitive distinction of whether the water-based paint on the upper end of the test plate is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the workbench and the fixing unit of the present invention.

[0024] Figure 3 It is a cutaway view of the workbench of the present invention.

[0025] Figure 4 It is a cross-sectional view (along any diagonal line of the workbench) of the workbench and the fixing unit of the present invention.

[0026] Figure 5 4 is a cross-sectional view (along the longitudinal section of the storage barrel) of the detection unit of the present invention.

[0027] Figure 6 It is a cross-sectional view of the detection unit of the present invention.

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the detection unit of the present invention (viewed from above).

[0029] Figure numerals: 1, workbench; 2, fixing unit; 21, limit slide; 22, displacement block; 23, contraction spring; 24, connecting block; 25, support plate; 26, limit assembly; 261, positioning column; 262, support plate; 263, L-shaped frame; 264, top extension spring rod; 265, extrusion limit block; 27, adjustment assembly; 271, telescopic cylinder; 272, linkage plate; 273, positioning block; 274, roller; 275, fixing plate ; 276, rotating shaft; 277, pull rope; 3, detection unit; 31, U-shaped frame; 32, fixing block; 33, positioning cylinder; 34, receiving frame; 35, linkage cylinder; 36, execution block; 37, driving motor; 38, storage barrel; 39, discharging assembly; 391, storage cavity; 392, discharge hole; 393, smear pad; 30, friction assembly; 301, mounting block; 302, connecting plate; 303, straight scraper rod; 304, arc scraper rod. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0031] The following describes a water-based paint adhesion detection device according to an embodiment of the present invention with reference to the accompanying drawings. Figure 1A water-based paint adhesion testing device includes a workbench 1, a fixing unit 2 and a testing unit 3. The workbench 1 is a horizontally placed rectangular structure. Support columns are arranged at the lower end of the workbench 1 and near its four corners.

[0032] See also Figure 2 , Figure 3 and Figure 4 The fixing unit 2 includes a limiting slide 21, a displacement block 22, a contraction spring 23, a connecting block 24, a support plate 25, a limiting assembly 26 and an adjusting assembly 27, wherein: two sliding groups are provided at the upper end of the workbench 1, each sliding group includes two limiting slides 21 symmetrically arranged about the diagonal of the upper surface of the workbench 1, a displacement block 22 is slidably arranged in the limiting slide 21, a contraction spring 23 is installed on one side wall of the displacement block 22 and the limiting slide 21 away from the middle of the workbench 1, the contraction spring 23 always applies a contraction force to the displacement block 22 pointing away from the middle of the workbench 1, a support plate 25 is provided at the upper end of the displacement block 22 through the connecting block 24, a limiting assembly 26 is provided on the support plate 25, and an adjusting assembly 27 is installed between the workbench 1 and the displacement block 22; the limiting assembly 26 includes a positioning column 261, a supporting plate 262, an L-shaped frame 263, and a top extension spring rod 264 and an extrusion limit block 265, wherein: a supporting plate 262 is installed on the upper end of the supporting plate 25 and on one side close to the middle of the workbench 1 through a positioning column 261, an L-shaped frame 263 is arranged on the upper end of the supporting plate 25 and on one side away from the middle of the workbench 1, and an extension spring rod 264 is arranged on both side walls of the inner angle of the L-shaped frame 263 and on one side close to the supporting plate 262, and an extrusion limit block 265 is installed on the side of the extension spring rod 264 close to the supporting plate 262; the extension spring rod 264 always applies an extension force to the extrusion limit block 265 pointing to the supporting plate 262, the extrusion limit block 265 is located above the supporting plate 262, and the cross-section of the extrusion limit block 265 is a triangular structure; in actual application of the present invention, it is necessary to apply water-based paint on a special detection plate, and after the water-based paint adheres and solidifies, the detection plate is placed on the fixing unit 2 to detect the adhesion of the water-based paint.

[0033] During operation, the detection plate is placed on multiple extrusion limit blocks 265 and pressed downward. The detection plate moves the extrusion limit block 265 to the side away from the supporting plate 262 and rests on the supporting plate 262. The multiple supporting plates 262 simultaneously apply an upward supporting force to the detection plate. At the same time, the extrusion limit block 265 rests on the upper side of the detection plate under the action of the top spring rod 264, so that the extrusion limit block 265 cooperates with the supporting plate 262 to squeeze and limit multiple corners of the detection plate at the same time, preventing the detection plate from shaking and warping at will, so as to ensure the stability of the detection plate during the detection process. In addition, the extrusion limit block 265 and the supporting plate 262 can limit and fix detection plates of different thicknesses; after the detection is completed, the detection plate can be removed from the supporting plate 262.

[0034] See also Figure 3 and Figure 4 The adjustment component 27 includes a telescopic cylinder 271, a linkage plate 272, a positioning block 273, a roller 274, a fixed plate 275, a rotating shaft 276 and a pull rope 277, wherein: a telescopic cylinder 271 is arranged in the middle of the lower end of the workbench 1, a linkage plate 272 is installed at the telescopic end of the telescopic cylinder 271, a positioning block 273 is arranged at the lower end of the displacement block 22, a notch is opened at the lower end of the positioning block 273, and a roller 274 is installed in the notch, and two fixed plates 275 are symmetrically arranged about the positioning block 273 on one side of the lower end of the workbench 1 close to the telescopic cylinder 271, and the two fixed plates 275 are symmetrical about the positioning block 273. A rotating shaft 276 is rotatably arranged on the opposite side of 75, and a plurality of pull ropes 277 are evenly arranged on the outer wall of the linkage plate 272 in the circumferential direction. The end of the pull rope 277 away from the linkage plate 272 is connected to the roller 274, and the middle part of the pull rope 277 slides against the rotating shaft 276; in the initial state, the telescopic cylinder 271 is in a retracted state, the linkage plate 272 does not apply a tensile force to the pull rope 277, and the displacement block 22 drives the positioning block 273 to move to the side of the limiting slide groove 21 away from the middle of the workbench 1 under the action of the contraction spring 23. At this time, the distance between the plurality of support plates 25 is the largest.

[0035] When testing different types of water-based paints, it is necessary to replace the testing plate matched with the water-based paint, so the length, width and thickness of the testing plate are prone to change. Since the extrusion limit block 265 and the supporting plate 262 can limit and fix the testing plates of different thicknesses, it is only necessary to adjust the position of the supporting plate 25 according to the length and width of the testing plate. The specific operation steps are as follows: start the telescopic cylinder 271, and the telescopic cylinder 271 drives the linkage plate 272 to move downward, so that the linkage plate 272 applies a tensile force to the pull rope 277, and the positioning block 273 and the displacement block 22 are driven by the pull rope 277 to move along the limiting slide groove 21 to the middle side close to the workbench 1, so that the support plate 25 moves with the displacement block 22, so that the distance between the multiple support plates 25 can be reduced according to the length and width of the testing plate, so that the supporting plate 262 at the upper end of the support plate 25 is located at the corner of the testing plate, so as to facilitate the limit and fixation of the testing plates of different sizes, and then detect different types of water-based paints.

[0036] See also Figure 1 , Figure 5 and Figure 6 The detection unit 3 includes a U-shaped frame 31, a fixing block 32, a positioning cylinder 33, a receiving frame 34, a linkage cylinder 35, an execution block 36, a drive motor 37, a storage cylinder 38, a discharging assembly 39 and a friction assembly 30, wherein: a U-shaped frame 31 with an opening downward is installed at the upper end of the workbench 1, a fixing block 32 is arranged between the U-shaped frame 31 and the workbench 1, and the U-shaped frame 31 can be fixed by the fixing block 32, so that the U-shaped frame 31 has more stability, a positioning cylinder 33 is installed at the lower end of the U-shaped frame 31, and a linkage cylinder 35 is arranged at the telescopic end of the positioning cylinder 33 through the receiving frame 34, and the lower end of the linkage cylinder 35 is rotatably connected with the execution block 36, and a drive motor 37 is arranged at the upper end of the linkage cylinder 35 through the motor seat, and the output shaft of the drive motor 37 is connected to the execution block 36, and a storage cylinder is installed at the lower end of the execution block 36 The barrel 38 has a plurality of through holes evenly arranged at the circumference of the lower end of the storage barrel 38, and a discharge assembly 39 and a friction assembly 30 are installed at the lower end of the storage barrel 38; the discharge assembly 39 includes a storage cavity 391, a discharge hole 392 and a smear pad 393, wherein: a plurality of storage cavities 391 corresponding to the positions of the through holes are evenly arranged at the circumference of the lower end of the storage barrel 38, the storage cavity 391 is communicated with the through hole, a plurality of discharge holes 392 are arranged at the lower end of the storage cavity 391, and a smear pad 393 is detachably installed at the lower end of the storage cavity 391; the smear pad 393 can be elastically deformed under the action of external force; during the detection of the water-based paint on the upper end of the detection plate, the present invention adopts a corrosive liquid for detection, so that the water-based paint can be corroded by the corrosive liquid, thereby enhancing the detection effect of the water-based paint.

[0037] See also Figure 6 and Figure 7The friction assembly 30 includes a mounting block 301, a connecting plate 302 and a straight scraper rod 303, wherein: a plurality of mounting blocks 301 arranged alternately with the material storage cavity 391 are evenly arranged at the lower end of the material storage barrel 38 in the circumferential direction, a connecting plate 302 is arranged at the lower end of the mounting block 301, a straight scraper rod 303 is arranged at the lower end of the connecting plate 302, and the straight scraper rod 303 is arranged along the middle of the connecting plate 302 close to the outer wall of the material storage barrel 38 to one side of the axis of the material storage barrel 38; two arc groups are symmetrically arranged about the straight scraper rod 303 at the lower end of the connecting plate 302, each arc group includes a plurality of arc scraper rods 304, and the plurality of arc scraper rods 304 are arranged at equal intervals along the straight scraper rod 303; the cross-sections of the straight scraper rod 303 and the arc scraper rod 304 are both triangular structures, and the lower ends of the straight scraper rod 303 and the arc scraper rod 304 are flush.

[0038] During operation, firstly, the corrosive liquid is injected into the storage barrel 38, and the corrosive liquid flows into the storage cavity 391 along the through hole, and then the corrosive liquid penetrates into the smear pad 393 through the discharge hole 392; after the detection plate is fixed, the positioning cylinder 33 is started, and the positioning cylinder 33 drives the linkage cylinder 35 to move downward through the receiving frame 34, and the linkage cylinder 35 drives the execution block 36, the storage barrel 38 and the storage cavity 391 to move downward as a whole, so that the storage cavity 391 drives the smear pad 393 to abut against the upper end of the detection plate, and at this time, the smear pad 393 shrinks under the squeezing force of the storage cavity 391 and The corrosive liquid inside it is smeared on the upper end of the detection plate. At the same time, the connecting plate 302 at the lower end of the storage barrel 38 drives the straight scraper rod 303 and the arc scraper rod 304 to press against the upper end of the detection plate, and then the drive motor 37 is started. The drive motor 37 drives the execution block 36 and the storage barrel 38 to rotate. The storage barrel 38 drives the smearing pad 393 to move circumferentially on the upper end of the detection plate through the storage cavity 391, thereby smearing the corrosive liquid circumferentially on the upper end of the detection plate, so that the corrosive liquid corrodes the water-based paint; if the adhesion of the water-based paint is unqualified, it is easy to fall off the detection plate under the action of corrosion.

[0039] Subsequently, the storage barrel 38 drives the straight scraper rod 303 to move circumferentially at the upper end of the detection plate through the connecting plate 302, so that fan-shaped friction is generated between the straight scraper rod 303 and the corroded water-based paint. Therefore, if the adhesion of the water-based paint is unqualified, the water-based paint on the upper end of the detection plate is prone to large-scale scratches and falling off under the action of the straight scraper rod 303. During this period, the connecting plate 302 drives the arc scraper rod 304 to move circumferentially with the storage barrel 38 and generates arc linear friction with the corroded water-based paint. Since the contact area between the arc scraper rod 304 and the water-based paint is linear contact, if the adhesion of the water-based paint is unqualified, arc scratches are prone to appear on the water-based paint on the upper end of the detection plate; through the above steps, the water-based paint can be tested at multiple levels at one time to improve the detection accuracy of the water-based paint; after the detection is completed, the drive motor 37 is turned off, and then the positioning cylinder 33 drives the receiving frame 34, the linkage cylinder 35, the execution block 36, the storage barrel 38 and the storage cavity 391 to move upward and reset as a whole.

[0040] The working process of the present invention is as follows: S1: Start the telescopic cylinder 271, and the telescopic cylinder 271 drives the linkage plate 272 to move downward, so that the linkage plate 272 applies a tensile force to the pull rope 277, and drives the positioning block 273, the displacement block 22 and the support plate 25 to move through the pull rope 277, so that the distance between multiple support plates 25 can be reduced according to the length and width of the detection plate.

[0041] S2: Place the detection plate on multiple extrusion limit blocks 265 and press downward. The detection plate moves the extrusion limit blocks 265 to the side away from the supporting plate 262 and rests on the supporting plate 262. The extrusion limit blocks 265 cooperate with the supporting plate 262 to simultaneously perform extrusion limit on multiple corners of the detection plate.

[0042] S3: First, the corrosive liquid is injected into the storage barrel 38. The corrosive liquid flows into the storage cavity 391 along the through hole and penetrates into the smear pad 393 through the discharge hole 392. Then, the positioning cylinder 33 is started. The positioning cylinder 33 drives the receiving frame 34, the linkage cylinder 35, the execution block 36, the storage barrel 38 and the storage cavity 391 to move downward as a whole, so that the storage cavity 391 drives the smear pad 393 to press against the upper end of the detection plate. At this time, the smear pad 393 shrinks under the squeezing force of the storage cavity 391 and smears the corrosive liquid inside it on the upper end of the detection plate. At the same time, the connecting plate 302 at the lower end of the storage barrel 38 drives the straight scraper rod 303 and the arc scraper rod 304 to press against the upper end of the detection plate.

[0043] S4: Start the drive motor 37, the drive motor 37 drives the execution block 36, the material storage barrel 38, the material storage cavity 391 and the smear pad 393 to move circumferentially, so that the smear pad 393 smears the corrosive liquid circumferentially on the upper end of the detection plate, and then the material storage barrel 38 drives the straight scraper rod 303 and the arc scraper rod 304 to move circumferentially on the upper end of the detection plate through the connecting plate 302, so that the straight scraper rod 303 and the arc scraper rod 304 both generate friction with the corroded water-based paint. If the adhesion of the water-based paint is unqualified, the water-based paint on the upper end of the detection plate is prone to large-scale scratches and falling off under the action of the straight scraper rod 303, and the detection plate is prone to arc scratches under the action of the arc scraper rod 304; in this way, multi-level detection of the water-based paint is performed at one time.

[0044] S5: After the water-based paint inspection is completed, turn off the drive motor 37, and then use the positioning cylinder 33 to drive the receiving frame 34, the linkage cylinder 35, the execution block 36, the storage cylinder 38 and the storage cavity 391 to move upward and reset as a whole, and then remove the inspection plate from the supporting plate 262, and then observe whether the water-based paint on the upper end of the inspection plate has defects such as scratches or peeling.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water-based paint adhesion testing device, characterized in that: include: The workbench is a horizontally placed rectangular structure, and support columns are arranged at the lower end of the workbench and near its four corners; A fixing unit, the fixing unit comprises a limit slide, a displacement block, a contraction spring, a connecting block, a support plate, a limit assembly and an adjustment assembly, wherein: two sliding groups are provided at the upper end of the workbench, each sliding group comprises two limit slides symmetrically arranged about the diagonal line of the upper surface of the workbench, a displacement block is slidably arranged in the limit slide, a contraction spring is installed on a side wall of the displacement block and the limit slide away from the middle of the workbench, a support plate is provided at the upper end of the displacement block through the connecting block, a limit assembly is provided on the support plate, and an adjustment assembly is installed between the workbench and the displacement block; The detection unit comprises a U-shaped frame, a fixed block, a positioning cylinder, a receiving frame, a linkage cylinder, an execution block, a driving motor, a storage barrel, a discharging assembly and a friction assembly, wherein: a U-shaped frame with an opening downward is installed at the upper end of the workbench, a fixed block is arranged between the U-shaped frame and the workbench, a positioning cylinder is installed at the lower end of the U-shaped frame, a linkage cylinder is arranged at the telescopic end of the positioning cylinder through the receiving frame, an execution block is rotatably docked at the lower end of the linkage cylinder, a driving motor is arranged at the upper end of the linkage cylinder through a motor seat, an output shaft of the driving motor is connected to the execution block, a storage barrel is installed at the lower end of the execution block, a plurality of through holes are evenly penetrated in the circumferential direction of the lower end of the storage barrel, and a discharging assembly and a friction assembly are installed at the lower end of the storage barrel; The discharging assembly comprises a material storage cavity, a material discharge hole and a smear pad, wherein: a plurality of material storage cavities corresponding to the positions of the through holes are evenly arranged at the circumference of the lower end of the material storage barrel, the material storage cavity is connected with the through hole, a plurality of material discharge holes are opened at the lower end of the material storage cavity, and a smear pad is detachably installed at the lower end of the material storage cavity; The friction assembly includes a mounting block, a connecting plate and a straight scraper rod, wherein: the lower end of the storage barrel is circumferentially evenly provided with a plurality of mounting blocks staggered with the storage cavity, the lower end of the mounting block is provided with a connecting plate, the lower end of the connecting plate is provided with a straight scraper rod, and the straight scraper rod extends along the angular bisector of the connecting plate.

2. The water-based paint adhesion testing device according to claim 1, characterized in that: The limiting assembly includes a positioning column, a supporting plate, an L-shaped frame, an extension spring rod and an extrusion limiting block, wherein: the supporting plate is installed on the upper end of the supporting plate and on the side close to the middle of the workbench through the positioning column, the upper end of the supporting plate and on the side away from the middle of the workbench is provided with an L-shaped frame, the two side walls of the inner corner of the L-shaped frame and on the side close to the supporting plate are provided with extension spring rods, and the extrusion limiting block is installed on the side of the extension spring rod close to the supporting plate.

3. The water-based paint adhesion testing device according to claim 1, characterized in that: The adjustment component includes a telescopic cylinder, a linkage plate, a positioning block, a roller, a fixed plate, a rotating shaft and a pull rope, wherein: a telescopic cylinder is arranged in the middle of the lower end of the workbench, a linkage plate is installed at the telescopic end of the telescopic cylinder, a positioning block is arranged at the lower end of the displacement block, a notch is opened at the lower end of the positioning block, a roller is installed in the notch, two fixed plates are symmetrically arranged about the positioning block on one side of the lower end of the workbench close to the telescopic cylinder, a rotating shaft is rotatably arranged on the opposite sides of the two fixed plates, a plurality of pull ropes are evenly arranged on the outer wall of the linkage plate in a circumferential direction, the end of the pull rope away from the linkage plate is connected to the roller, and the middle part of the pull rope slides against the rotating shaft.

4. The water-based paint adhesion testing device according to claim 1, characterized in that: The lower end of the connecting plate is symmetrically provided with two arc groups about the straight scraping rod, each arc group includes a plurality of arc scraping rods, and the plurality of arc scraping rods are arranged at equal intervals along the straight scraping rod.

5. The water-based paint adhesion testing device according to claim 4, characterized in that: The cross sections of the straight scraper rod and the arc-shaped scraper rod are both triangular structures, and the lower ends of the straight scraper rod and the arc-shaped scraper rod are flush with each other.

6. The water-based paint adhesion testing device according to claim 2, characterized in that: The extrusion limiting block is located above the supporting plate, and the cross section of the extrusion limiting block is a triangular structure.

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