Device and method for detecting thickness of anti-corrosion lining coating of steel products

Abstract

The present application relates to the technical field of steel product coating thickness detection, and in particular to a steel product anti-corrosion lining coating thickness detection device and method, comprising a detection frame, wherein the detection frame is provided with a storage slot for placing steel plates, and the detection frame is also equipped with a detection mechanism for detecting the thickness of the steel plate coating. After the steel plate is brushed with a coating roller coated with purple litmus solution, the purple litmus can cover the steel plate coating plane and the raised parts of the steel plate coating, while the sunken parts of the steel plate coating are not exposed to the purple litmus solution. At this time, the part of the steel plate that does not appear purple is the sunken part of the steel plate coating. When the steel plate coated with purple litmus is brushed with a coating roller coated with alkaline solution, if an area turns blue, it means that there are raised areas in the steel plate coating, and then the detection can be completed by brushing twice, and the coating roller fully covers the steel plate without dead angles, and the comparison of the two pictures more intuitively reflects the detection effect of the steel plate.

Description

Technical Field

[0001] The present application relates to the technical field of steel product coating thickness detection, and in particular to a device and method for detecting the thickness of an anti-corrosion lining coating on a steel product. Background Art

[0002] Steel products are widely used in industrial and everyday environments, and their safety is crucial to preventing leaks and structural failure. Because steel products are often used in humid and salty environments, they are susceptible to rust over time, threatening the safe operation and service life of facilities. Therefore, anti-corrosion coatings play a key role in protecting steel products. These coatings not only prevent rust but also enhance structural durability.

[0003] Therefore, in order to ensure the pass rate of the surface coating of steel products, it is often necessary to detect the thickness of the surface coating of steel products. In the existing coating thickness detection process, a probe array detection method is often used. For example, the patent application with publication number CN117685919B discloses a color-coated plate coating thickness detection device, including a horizontally arranged detection table, a clamping device for clamping the color-coated plate is arranged on the inner wall of the detection table, an electric slide is arranged on the top of the detection table, and a detection device is slidingly arranged on the electric slide. The surface of the detection table is used to place the color-coated plate. After the color-coated plate is clamped, the spiral rod is driven to rotate by the provided driving motor. The rotation of the spiral rod causes several groups of sliding frames arranged on the fixed rod, the spiral rod and the clamping rod to be distributed at equal intervals. The width of the color-coated plate is divided into multiple areas by the several groups of sliding frames, so that the sliding frames correspond to each area on the width of the color-coated plate, so as to divide the surface of the color-coated plate into areas, thereby ensuring that it is easier to distinguish when detecting the uniformity of its coating thickness.

[0004] However, the above patent application still has the following defects during use: although the color-coated plate can be divided into various areas by a sliding frame, in the subsequent detection process, it is still necessary to move the detector multiple times to detect each position in the area. The process is relatively cumbersome, and moving the detector multiple times may cause detection blind spots between various positions in the area, resulting in unrepresentative detection results.

[0005] In addition, after the detection is completed, it is necessary to analyze whether the partition block has been marked and the depth of the marking, which is time-consuming and reduces the detection efficiency. Summary of the Invention

[0006] In order to solve the above technical problems, the present application provides a device and method for detecting the thickness of the anti-corrosion lining coating of steel products, which adopts the following technical solutions:

[0007] In a first aspect, a device for detecting the thickness of an anti-corrosion lining coating of a steel product includes a detection frame, wherein the detection frame is provided with a storage slot for placing a steel plate, and a detection mechanism for detecting the thickness of the steel plate coating is also installed on the detection frame.

[0008] The detection mechanism includes: two brush rollers, which are symmetrically distributed along the length direction of the detection frame and move along the length direction of the detection frame.

[0009] The height adjustment component is arranged on the detection frame and is used to adjust the height of the brush roller.

[0010] There are two spray racks which are symmetrically distributed along the length of the detection rack and correspond to the brush rollers on the same side.

[0011] The circumferential surface of any one of the brush rollers is coated with purple litmus solution, and the circumferential surface of the remaining brush roller is coated with alkaline solution.

[0012] Preferably, the circumferential surface of the brush roller is provided with an absorbent sponge, and a plurality of sponge strips are evenly arranged on the circumferential surface of the absorbent sponge along its circumference, and the sponge strips of the same brush roller are equipped with a brush sponge together.

[0013] Preferably, the height adjustment assembly includes: two groups of moving blocks corresponding to the brush rollers and slidably arranged on the detection frame.

[0014] The lifting block is slidably arranged on the top of the moving block along the height direction of the moving block. The brush roller is installed between the opposite surfaces of the corresponding group of lifting blocks through a bearing, and the shaft head of the brush roller passes through the corresponding lifting block.

[0015] There are two lifting rods, which are symmetrically distributed along the width direction of the detection frame and extend along the length direction of the detection frame. The lifting rods penetrate and slide on the lifting blocks on the corresponding sides.

[0016] There are two groups of limit rods, and each group of limit rods is symmetrically arranged along the length direction of the lifting rod and installed on the detection frame. The limit rods pass through the lifting rod on the corresponding side.

[0017] The threaded rod corresponds to the limit rod one by one and is rotatably mounted on the detection frame through a bearing. The threaded rod passes through the lifting rod on the corresponding side and is connected to the lifting rod on the corresponding side through a threaded transmission method.

[0018] Preferably, the lifting rod is symmetrically provided with connecting rods along its length direction, the connecting rods on the same lifting rod are commonly provided with a rack plate, and the brush roller shaft head is provided with a gear meshing with the rack plate on the same side.

[0019] Preferably, a movable frame is slidingly provided at the top of the spray frame, a spray pipe is installed at the bottom of the movable frame, and a return spring rod is symmetrically provided inside the spray frame along the width direction of the detection frame, one end of the return spring rod is installed on the spray frame, and the other end of the return spring rod is installed on the corresponding movable frame.

[0020] Preferably, a linkage rod for driving the movable frame to move is installed on the lifting block.

[0021] Preferably, both ends of the brush roller are equipped with pressing discs for limiting the position of the steel plate.

[0022] Preferably, a linkage block is installed on the lifting block corresponding to the brush roller coated with purple litmus, and a support frame is installed on the rack plate along its length direction. A lifting rod that cooperates with the linkage block is installed on the support frame, and a makeshift groove for making way for the lifting rod is opened on the lifting block corresponding to the linkage block.

[0023] Preferably, a guide plate is installed on one end of the lifting rod close to the brush roller coated with the alkaline solution through a spring hinge, a stop block is installed on the guide plate, and a stop plate matching the stop block is installed on the lifting rod.

[0024] In the second aspect, a method for detecting the thickness of an anti-corrosion lining coating of a steel product is provided, and its use method includes the following steps: S1: placement treatment, placing the steel plate to be tested inside a storage tank.

[0025] S2: Apply purple litmus solution to the steel plate using a paint roller and take a picture of the steel plate after application of the purple litmus solution.

[0026] S3: Secondary coating: Use a coating roller to apply alkaline solution to the steel plate coated with purple litmus solution, and take pictures of the steel plate after coating with alkaline solution.

[0027] S4: Analysis and processing, comparative analysis of the pictures taken by S2 and S3.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. After the steel plate is coated with the purple litmus solution by the coating roller designed by the present invention, the purple litmus can cover the steel plate coating plane and the raised parts of the steel plate coating, while the recessed parts of the steel plate coating are not exposed to the purple litmus solution. At this time, the part of the steel plate that does not appear purple is the recessed part of the steel plate coating. When the steel plate coated with the purple litmus solution is coated with the coating roller, if an area turns blue, it means that there are protrusions in the steel plate coating, and then the detection can be completed by two coatings. The coating roller fully covers the steel plate and there is no dead angle. The comparison of the pictures taken twice more intuitively reflects the detection effect of the steel plate.

[0030] 2. The height adjustment component designed in the present invention can change the height of the brush roller, thereby enabling the device to perform brushing inspection on steel plates of different thicknesses, with a wider range of applications.

[0031] 3. In the coating roller designed in the present invention, when the coating sponge encounters a coating protrusion during the coating process, it may squeeze the coating sponge and cause it to deform, causing the purple litmus solution or alkaline solution inside the coating sponge to overflow, resulting in excess purple litmus solution or alkaline solution remaining on the surface of the steel plate. The excess solution may cause contamination of the flat area of the steel plate coating, thereby causing misjudgment. The absorption sponge can recover the purple litmus solution or alkaline solution that overflows due to the squeezing and deformation of the coating sponge, thereby avoiding errors in the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0033] Figure 2 It is a schematic diagram of the three-dimensional installation structure between the coating roller, the absorption sponge and the coating sponge of the present invention.

[0034] Figure 3 It is a schematic diagram of the three-dimensional installation structure between the detection rack, height adjustment components and spray rack of the present invention.

[0035] Figure 4 This invention Figure 3 A partial enlarged view of point A.

[0036] Figure 5 This invention Figure 3 A partial enlarged view of point B.

[0037] Figure 6 This invention Figure 3 A partial enlarged view of point C.

[0038] Figure 7 It is a schematic diagram of the three-dimensional installation structure among the lifting rod, guide plate, stop block and stop plate of the present invention.

[0039] Figure 8 This is a flow chart of the method for detecting the thickness of the anti-corrosion lining coating of steel products according to the present invention.

[0040] Explanation of the accompanying drawings: 1. Detection frame; 2. Storage tank; 3. Detection mechanism; 31. Brush roller; 311. Absorbent sponge; 312. Sponge strip; 313. Brush sponge; 314. Pressing disc; 315. Linkage block; 316. Lifting rod; 317. Gap groove; 318. Guide plate; 319. Stop block; 310. Stop plate; 32. Height adjustment assembly; 321. Moving block; 322. Lifting block; 323. Lifting rod; 324. Connecting rod; 325. Rack plate; 326. Gear; 327. Limiting rod; 328. Threaded rod; 33. Spray rack; 331. Moving rack; 332. Spray pipe; 333. Return spring rod; 334. Linkage rod. DETAILED DESCRIPTION

[0041] The following is combined with Figures 1 to 8 This application is described in further detail.

[0042] The embodiment of the present application discloses a device and method for detecting the thickness of an anti-corrosion lining coating on a steel product. By first applying a purple litmus solution to a steel plate to determine the concave portion of the coating, and then applying an alkaline solution to the steel plate to determine the convex portion of the coating, the detection time is reduced and the detection results are more intuitive.

[0043] Example 1:

[0044] See Figure 1 as well as Figure 2 A device for detecting the thickness of an anti-corrosion lining coating of a steel product comprises a detection frame 1, a storage slot 2 for placing a steel plate is provided on the detection frame 1, and a detection mechanism 3 for detecting the thickness of the steel plate coating is also installed on the detection frame 1.

[0045] The detection mechanism 3 includes: a brush roller 31 (see Figure 4 ), there are two of them and they are symmetrically distributed along the length direction of the detection rack 1 and move along the length direction of the detection rack 1.

[0046] The height adjustment component 32 is provided on the detection frame 1 and is used to adjust the height of the brush roller 31 .

[0047] There are two spray racks 33 , which are symmetrically distributed along the length direction of the detection rack 1 and correspond to the brush rollers 31 on the same side.

[0048] The circumferential surface of any one of the brush rollers 31 is coated with purple litmus solution, and the circumferential surface of the remaining brush roller 31 is coated with alkaline solution.

[0049] After the steel plate is coated with the purple litmus solution by the coating roller 31, the purple litmus can cover the entire steel plate coating plane and the raised parts of the steel plate coating, while the sunken parts of the steel plate coating are not exposed to the purple litmus solution. At this time, the part of the steel plate that does not appear purple is the sunken part of the steel plate coating. When the steel plate coated with the purple litmus solution is coated with the coating roller 31, if an area turns blue, it means that there are raised parts in the steel plate coating, and then the detection can be completed through two brushing steps. The coating roller 31 fully covers the steel plate and there is no dead angle. The comparison of the two pictures taken more intuitively reflects the detection effect of the steel plate.

[0050] See Figure 2 The circumferential surface of the brush roller 31 is provided with an absorbent sponge 311, and a plurality of sponge strips 312 are evenly arranged along the circumference of the absorbent sponge 311. The sponge strips 312 of the same brush roller 31 are jointly installed with a brush sponge 313.

[0051] according to Figure 1 , wherein the spray rack 33 on the left can spray purple litmus solution to the brush roller 31 on the corresponding side, and the spray rack 33 on the right can spray alkaline solution (such as sodium hydroxide solution, etc.) to the brush roller 31 on the corresponding side. The left brush roller 31 is coated with purple litmus solution, so the brush roller 31 on the other side is coated with alkaline solution. At the starting position, the height of the left brush roller 31 is slightly lower than the height of the right brush roller 31, and the bottom of the left brush roller 31 is always just against the flat surface of the steel plate coating, thereby ensuring that the left brush roller 31 can brush the flat plate and the raised part of the steel plate coating when brushing the purple litmus solution, while the right brush roller 31 is just separated from the flat surface of the steel plate coating when brushing the alkaline solution on the steel plate, and thus the right brush roller 31 can only brush the raised part of the steel plate coating.

[0052] In addition, when the coating sponge 313 passes through some larger coating protrusions on the steel plate, the coating sponge 313 is greatly deformed, which may squeeze the coating sponge 313 to cause a large deformation, causing the purple litmus solution or alkaline solution inside the coating sponge 313 to overflow, resulting in excess purple litmus solution or alkaline solution remaining on the surface of the steel plate, and the excess solution may cause contamination of the flat area of the steel plate coating, thereby causing misjudgment. After the coating sponge 313 is deformed to a certain extent, it will contact the absorption sponge 311, and the absorption sponge 311 can recover the purple litmus solution or alkaline solution inside the coating sponge 313, thereby avoiding the overflow of the purple litmus solution or alkaline solution inside the coating sponge 313 and reducing errors in the detection results.

[0053] See Figure 3 as well as Figure 4 The height adjustment assembly 32 includes: two groups of moving blocks 321 corresponding to the brush roller 31 and slidably arranged on the detection frame 1.

[0054] The lifting block 322 is slidably arranged on the top of the moving block 321 along the height direction of the moving block 321 . The brush roller 31 is installed between the opposite surfaces of the corresponding group of lifting blocks 322 through bearings, and the shaft head of the brush roller 31 passes through the corresponding lifting block 322 .

[0055] There are two lifting rods 323 , which are symmetrically distributed along the width direction of the detection frame 1 and extend along the length direction of the detection frame 1 . The lifting rods 323 penetrate and slide on the lifting blocks 322 on the corresponding sides.

[0056] The lifting rod 323 is symmetrically mounted with connecting rods 324 along its length. The connecting rods 324 on the same lifting rod 323 are mounted with a rack plate 325 . The brush roller 31 is mounted with a gear 326 meshing with the rack plate 325 on the same side on the shaft head.

[0057] Before placing the steel plate, the two brush rollers 31 need to be moved to the inside of the spray rack 33 to ensure that the steel plate will not cover the storage tank 2 so that the steel plate can be placed inside the storage tank 2. During operation, the moving block 321 is driven to move by an external driving force (electric slider), and the moving block 321 drives the brush roller 31 to move synchronously through the lifting block 322. During the movement of the brush roller 31, the gear 326 and the rack plate 325 are engaged with each other and rotate synchronously. At this time, the brush roller 31 rotates while moving.

[0058] See Figure 5 A movable frame 331 is slidingly set at the top of the spray frame 33, and a spray pipe 332 is installed at the bottom of the movable frame 331. A return spring rod 333 is symmetrically arranged inside the spray frame 33 along the width direction of the detection frame 1. One end of the return spring rod 333 is installed on the spray frame 33, and the other end of the return spring rod 333 is installed on the corresponding movable frame 331.

[0059] A linkage rod 334 is installed on the lifting block 322 for driving the moving frame 331 to move.

[0060] The purple litmus solution can be sent into the spray pipe 332 on the left through the existing pump body, and the alkaline solution can be sent into the spray pipe 332 on the right through the existing pump body. As the brush roller 31 enters the interior of the spray rack 33, when the linkage rod 334 moves synchronously and abuts against the movable rack 331, the spray pipe 332 and the brush roller 31 on the same side are located in the same vertical plane, and the moving block 321 drives the brush roller 31 to continue moving through the lifting block 322. At this time, the lifting block 322 drives the movable rack 331 to move synchronously through the linkage rod 334, and resets. The spring rod 333 is compressed, and the movable frame 331 drives the spray pipe 332 to move synchronously during its movement, and then the spray pipe 332 moves synchronously during the movement of the brush roller 31, so that the spray pipe 332 on the left can spray purple litmus solution to the corresponding side and the brush roller 31 during the rotation process, and the purple litmus solution soaks the brush sponge 313 on the corresponding side of the brush roller 31, and the spray pipe 332 on the right can spray alkaline solution to the corresponding side and the brush roller 31 during the rotation process, and the alkaline solution soaks the brush sponge 313 on the corresponding side of the brush roller 31.

[0061] See Figure 6 In order to enable the device to detect steel plates of different thicknesses and improve the applicability of the device, the lifting rod 323 provided by the present invention can change the height of the brush roller 31 through the lifting block 322. Specifically, there are two groups of limit rods 327, and each group of limit rods 327 is symmetrically arranged along the length direction of the lifting rod 323 and installed on the detection frame 1. The limit rod 327 passes through the lifting rod 323 on the corresponding side.

[0062] The threaded rod 328 corresponds to the limiting rod 327 one by one and is rotatably mounted on the detection frame 1 through a bearing. The threaded rod 328 passes through the lifting rod 323 on the corresponding side and is connected to the lifting rod 323 on the corresponding side through a threaded transmission method.

[0063] During specific operation, the two coating rollers 31 are moved to the inside of the spray rack 33 on the corresponding side respectively, and then the steel plate to be tested is placed in the storage tank 2. According to the thickness of the steel plate, the threaded rod 328 is rotated. During the rotation of the threaded rod 328, the lifting block 322 is driven to move in the vertical direction through the lifting rod 323. During the movement of the lifting block 322, the two coating rollers 31 are driven to move synchronously, so that the coating roller 31 moves to the specified position, and then the coating roller 31 and the coating sponge 313 cooperate with each other to brush steel plates of different thicknesses, and have a wider applicability.

[0064] When the steel plate is placed and the purple litmus solution and the alkaline solution are sprayed onto the corresponding side of the coating sponge 313, the moving block 321 on the left is driven by an external driving force to move. During the movement of the moving block 321, the lifting block 322 drives the left side of the coating roller 31 to move. The reset spring rod 333 on the left is reset and the corresponding side of the spray pipe 332 is synchronously driven to reset through the moving frame 331. When the coating roller 31 moves to the moving position (that is, the natural length of the reset spring rod 333), the linkage rod 334 is disengaged from the moving frame 331, and the coating roller 31 coated with purple litmus continues to move to paint the steel plate.

[0065] It should be noted that, after the brush roller 31 sprays the purple litmus solution and leaves the spray rack 33, the moving speed of the moving block 321 is accelerated, and then the gear 326 and the rack plate 325 cooperate with each other to drive the corresponding side brush roller 31 to rotate faster, so that the excess purple litmus solution on the brush roller 31 can be thrown out during the acceleration of the speed of the brush roller 31, thereby avoiding the possibility of excessive purple litmus solution overflowing from the brush sponge 313.

[0066] After the brush roller 31 coated with purple litmus solution is applied to the steel plate, a picture of the steel plate surface is taken. The purple litmus can cover the entire steel plate coating plane and the raised parts of the steel plate coating, while the recessed parts of the steel plate coating are not exposed to the purple litmus solution. At this time, the part of the steel plate that does not appear purple is the recessed part of the steel plate coating.

[0067] After the steel plate is painted with purple litmus, the paint roller 31 painted with purple litmus is reset to the inside of the spray rack 33 on the corresponding side, and the spray pipe 332 on the corresponding side repeats the above action to spray the paint roller 31 with purple litmus solution again for standby use.

[0068] At this time, the moving block 321 on the right is driven to move by an external driving force. During the movement of the moving block 321, the right brush roller 31 is driven to move by the lifting block 322. The reset spring rod 333 on the right is reset and the spray pipe 332 on the corresponding side is synchronously driven to reset through the moving frame 331. When the brush roller 31 moves to the moving position (that is, the natural length of the reset spring rod 333), the linkage rod 334 is disengaged from the moving frame 331, and the brush roller 31 coated with the alkaline solution continues to move to brush the steel plate.

[0069] After the coating roller 31 coated with alkaline solution is applied to the steel plate coated with purple litmus, a picture of the steel plate surface is taken. If an area turns blue, it means that there are protrusions in the steel plate coating, and the detection can be completed by brushing twice. The coating roller 31 fully covers the steel plate and there is no dead angle. The comparison of the two pictures taken more intuitively reflects the detection effect of the steel plate.

[0070] After the steel plate is coated with alkaline solution, the coating roller 31 coated with alkaline solution is reset to the inside of the spray rack 33 on the corresponding side, and the spray pipe 332 on the corresponding side repeats the above action to spray the coating roller 31 with alkaline solution again for standby use.

[0071] It should be noted that in the starting position, the height of the left brush roller 31 is slightly lower than that of the right brush roller 31, and the bottom of the left brush roller 31 always just touches the flat surface of the steel plate coating, thereby ensuring that the left brush roller 31 can brush the flat plate and the raised parts of the steel plate coating when applying the purple litmus solution, while the right brush roller 31 just breaks away from the flat surface of the steel plate coating when applying the alkaline solution to the steel plate, and thus the right brush roller 31 can only brush the raised parts of the steel plate coating.

[0072] Replay Figure 4 Since the side of the steel plate close to the inside of the storage tank 2 may be uneven due to uneven coating thickness, if the steel plate is placed directly inside the storage tank 2, the brush roller 31 will shake due to the uneven surface of the steel plate when passing through the steel plate. Therefore, the pressing disc 314 provided by the present invention can limit the steel plate. Specifically, pressing discs 314 for limiting the steel plate are installed at both ends of the brush roller 31.

[0073] The circumferential surface of the pressing disc 314 only contacts a portion of the steel plate, which can reduce the possibility of incomplete painting of the steel plate due to the large contact area between the pressing disc 314 and the steel plate. Therefore, during the movement of the brush roller 31, the pressing disc 314 can limit the steel plate to ensure the stability of the steel plate during the painting process of the brush roller 31.

[0074] Example 2: Reference Figure 4 as well as Figure 7 On the basis of Example 1, since the coating roller 31 coated with purple litmus needs to be reset after brushing the steel plate, there is a situation in which the coating roller 31 brushes the steel plate again during the resetting process of the coating roller 31. Brushing the steel plate again may cause excessive purple litmus solution on the surface of the steel plate, resulting in the purple litmus solution also adhering to the concave parts of the coating on the surface of the steel plate, resulting in detection errors. Therefore, in order to solve the above problem, the coating roller 31 coated with purple litmus is lifted to a certain height when it is reset to avoid secondary contact between the coating roller 31 and the steel plate. Specifically, a linkage block 315 is installed on the lifting block 322 corresponding to the coating roller 31 coated with purple litmus, and a support frame is installed on the rack plate 325 along its length direction. A lifting rod 316 cooperating with the linkage block 315 is installed on the support frame, and a makeshift groove 317 for making way for the lifting rod 323 is opened on the lifting block 322 corresponding to the linkage block 315.

[0075] The lifting rod 316 is provided with a guide plate 318 at one end thereof close to the brush roller 31 coated with the alkaline solution through a spring hinge. A stop block 319 is provided on the guide plate 318 , and a stop plate 310 cooperating with the stop block 319 is provided on the lifting rod 316 .

[0076] During specific operation, when the moving block 321 drives the brush roller 31 coated with purple litmus solution to brush the steel plate through the lifting block 322, the linkage block 315 slides at the bottom of the lifting rod 316. Due to the existence of the give way groove 317, the brush roller 31 will drive the lifting block 322 to move up and down. At this time, the lifting rod 316 and the linkage block 315 cooperate with each other to limit the lifting block 322, thereby avoiding the possibility that the coating protrusions on the steel plate will move up and down through the brush roller 31 and the lifting block 322.

[0077] The guide plate 318 is tilted downward from left to right. When the corresponding moving block 321 moves to the guide plate 318, the linkage block 315 will drive the guide plate 318 to rotate around the spring hinge. When the moving block 321 drives the linkage block 315 to cross the guide plate 318, the guide plate 318 is reset. It should be noted that the height of the bottom end of the guide plate 318 is lower than the height of the linkage block 315. When the brush roller 31 coated with purple litmus needs to be reset, the moving block 321 is reset. During the movement of the moving block 321, the linkage block 315 is synchronously driven to reset through the lifting block 322. When the linkage block 315 moves to the guide plate 318, since the height of the bottom end of the guide plate 318 is lower than the height of the linkage block 315, the linkage block 315 will move along the inclined surface of the guide plate 318, and then the guide plate 318 and the linkage block 315 cooperate with each other to drive the lifting block 322 to move upward. However, because the give way slot 317 gives way, the lifting block 322 will not collide with the lifting rod 316.

[0078] At this time, because the stop block 319 cooperates with the stop plate 310, the guide plate 318 will not rotate around the spring hinge. Therefore, when the linkage block 315 moves to the top of the lifting rod 316, the corresponding brush roller 31 is at a certain distance from the steel plate. At this time, the moving block 321 continues to drive the corresponding brush roller 31 to reset. When it moves to the spray rack 33 on the corresponding side, the linkage block 315 disengages from the top of the lifting rod 316 and moves to the same height as the bottom of the lifting rod 316. The above steps can reduce the possibility that the purple litmus solution may be excessive on the surface of the steel plate due to re-brushing of the steel plate, resulting in the concave parts of the coating on the surface of the steel plate also adhering to the purple litmus solution, thereby avoiding detection errors and improving the accuracy of detection.

[0079] Finally, see Figure 8 The present invention also provides a method for detecting the thickness of an anti-corrosion lining coating of a steel product, and the method of use thereof comprises the following steps: S1: placement treatment, placing the steel plate to be detected inside the storage tank 2.

[0080] S2: One-time painting, the moving block 321 on the left is driven by an external driving force to move, and the left brush roller 31 is driven to move by the lifting block 322 during the movement of the moving block 321. The reset spring rod 333 on the left is reset and the corresponding spray pipe 332 is synchronously driven to reset through the moving frame 331. When the brush roller 31 moves to the moving position, the linkage rod 334 is disengaged from the moving frame 331, and the brush roller 31 coated with purple litmus continues to move to paint the steel plate, and a picture of the steel plate after being painted with purple litmus solution is taken.

[0081] S3: Secondary brushing, the moving block 321 on the right is driven by an external driving force to move, and the right brush roller 31 is driven to move by the lifting block 322 during the movement of the moving block 321. The reset spring rod 333 on the right is reset and the spray pipe 332 on the corresponding side is synchronously driven to reset through the moving frame 331. When the brush roller 31 moves to the moving position, the linkage rod 334 is disengaged from the moving frame 331, and the brush roller 31 coated with the alkaline solution continues to move to brush the steel plate, and a picture of the steel plate after being brushed with the alkaline solution is taken.

[0082] S4: Analysis and processing, comparing and analyzing the pictures taken in S2 and S3, that is, if there is a part that does not appear purple in step S2, it means that there is a concave part in the coating of the steel plate, otherwise there is no concave part; if there is an area that turns blue in step S3, it means that there is a convex part in the coating of the steel plate, otherwise there is no convex part.

[0083] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0084] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A device for detecting the thickness of an anti-corrosion lining coating of a steel product, comprising a detection frame (1), characterized in that: The detection frame (1) is provided with a storage slot (2) for placing the steel plate, and the detection frame (1) is also equipped with a detection mechanism (3) for detecting the thickness of the steel plate coating, wherein: The detection mechanism (3) comprises: Two brush rollers (31) are provided and symmetrically distributed along the length direction of the detection frame (1), and move along the length direction of the detection frame (1); A height adjustment assembly (32) is provided on the detection frame (1) and is used to adjust the height of the brush roller (31); two spray racks (33) are provided and are symmetrically distributed along the length direction of the detection frame (1) and correspond to the brush rollers (31) on the same side; The circumferential surface of any one of the brush rollers (31) is coated with a purple litmus solution, and the circumferential surface of the remaining brush roller (31) is coated with an alkaline solution; After the steel plate is coated with the purple litmus solution by the brush roller (31), the purple litmus covers the steel plate coating plane and the convex part of the steel plate coating, while the concave part of the steel plate coating does not contact the purple litmus solution. The part of the steel plate that does not show purple is the concave part of the steel plate coating. When the steel plate coated with the purple litmus solution is coated with the brush roller (31), if an area turns blue, it means that there is a convex part in the steel plate coating, and then the detection can be completed by two brushing steps. The circumferential surface of the brush roller (31) is provided with an absorption sponge (311), and a plurality of sponge strips (312) are evenly arranged on the circumferential surface of the absorption sponge (311) along its circumference. The sponge strips (312) of the same brush roller (31) are equipped with a brush sponge (313) together.

2. The device for detecting the thickness of an anti-corrosion lining coating of a steel product according to claim 1, characterized in that: The height adjustment assembly (32) comprises: The moving blocks (321) are provided in two groups and correspond to the brush rollers (31), and are slidably arranged on the detection frame (1); the lifting blocks (322) are slidably arranged on the top of the moving blocks (321) along the height direction of the moving blocks (321); the brush rollers (31) are installed between the opposite surfaces of the corresponding groups of lifting blocks (322) through bearings, and the shaft heads of the brush rollers (31) pass through the corresponding lifting blocks (322); Two lifting rods (323) are provided and are symmetrically distributed along the width direction of the detection frame (1) and extend along the length direction of the detection frame (1). The lifting rods (323) penetrate and slide on the lifting blocks (322) on the corresponding sides; Two groups of limiting rods (327) are provided, and each group of limiting rods (327) is symmetrically arranged along the length direction of the lifting rod (323) and installed on the detection frame (1). The limiting rods (327) pass through the lifting rod (323) on the corresponding side; The threaded rod (328) corresponds to the limiting rod (327) one by one and is rotatably mounted on the detection frame (1) via a bearing. The threaded rod (328) passes through the lifting rod (323) on the corresponding side and is connected to the lifting rod (323) on the corresponding side via a threaded transmission mode.

3. The device for detecting the thickness of an anti-corrosion lining coating of a steel product according to claim 2, characterized in that: The lifting rod (323) is symmetrically provided with a connecting rod (324) along its length direction, and the connecting rods (324) on the same lifting rod (323) are provided with a rack plate (325) in common, and a gear (326) meshing with the rack plate (325) on the same side is provided on the shaft head of the brush roller (31).

4. The device for detecting the thickness of an anti-corrosion lining coating of a steel product according to claim 2, characterized in that: A movable frame (331) is slidably provided at the top of the spray frame (33), a spray pipe (332) is installed at the bottom of the movable frame (331), and a return spring rod (333) is symmetrically provided inside the spray frame (33) along the width direction of the detection frame (1), one end of the return spring rod (333) is installed on the spray frame (33), and the other end of the return spring rod (333) is installed on the corresponding movable frame (331).

5. The device for detecting the thickness of an anti-corrosion lining coating of a steel product according to claim 4, characterized in that: The lifting block (322) is provided with a linkage rod (334) for driving the movable frame (331) to move.

6. The device for detecting the thickness of an anti-corrosion lining coating of a steel product according to claim 1, characterized in that: Both ends of the brush roller (31) are equipped with pressing discs (314) for limiting the position of the steel plate.

7. The device for detecting thickness of anti-corrosion lining coating of steel products according to claim 1, characterized in that: A linkage block (315) is installed on the lifting block (322) corresponding to the purple litmus-coated brush roller (31), and a support frame is installed on the rack plate (325) along its length direction. A lifting rod (316) that matches the linkage block (315) is installed on the support frame, and a clearance groove (317) for making way for the lifting rod (323) is opened on the lifting block (322) corresponding to the linkage block (315).

8. The device for detecting the thickness of an anti-corrosion lining coating of a steel product according to claim 7, characterized in that: The lifting rod (316) is provided with a guide plate (318) via a spring hinge at one end thereof close to the brush roller (31) coated with the alkaline solution, a stop block (319) is provided on the guide plate (318), and a stop plate (310) matched with the stop block (319) is provided on the lifting rod (316).

9. A method for detecting the thickness of an anti-corrosion lining coating on a steel product, comprising a device for detecting the thickness of an anti-corrosion lining coating on a steel product according to any one of claims 1 to 8, characterized in that: The method of use includes the following steps: S1: placement processing, placing the steel plate to be tested inside the storage tank (2); S2: One-time brushing, using a brush roller (31) to brush the steel plate with purple litmus solution, and taking a picture of the steel plate after being brushed with the purple litmus solution; S3: Secondary brushing, using a brush roller (31) to brush the steel plate coated with the purple litmus solution with an alkaline solution, and taking a picture of the steel plate after being brushed with the alkaline solution; S4: Analysis and processing, comparative analysis of the pictures taken by S2 and S3.

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