A kind of alkaline zinc-nickel coating thickness detection equipment

Abstract

The present invention relates to the field of coating measurement technology, and in particular to an alkaline zinc-nickel coating thickness detection device, comprising a detection base plate, a fixed disk arranged at the top center of the detection base plate, and a detection movable ring located at the top center of the fixed disk, wherein the detection base plate is a circular structure, and the top of the detection base plate is connected to the bottom of the fixed disk via an arc-shaped base plate, and fixed rings are arranged at both ends of the top of the fixed disk. The present invention realizes the surrounding detection of one side of the middle end of a cylindrical workpiece by a first thickness gauge on the movable plate through the fixed ring and the detection movable ring, and realizes the annular detection of both sides of the middle end of the cylindrical workpiece by a second thickness gauge on the movable plate through rotation after flipping, thereby achieving multi-directional coating thickness detection of the annular workpiece, with high detection efficiency and high detection accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of coating measurement, in particular to an alkaline zinc-nickel coating thickness detection device. Background Art

[0002] Electrogalvanizing is also called cold galvanizing. The workpiece is placed in an electrolyte to allow the electroplated metal to precipitate and deposit on the workpiece to form a coating, which is generally 4-12 microns. The quality of the coating is the most important link. During the electroplating process, due to factors such as fast speed, uneven current distribution, and weak dispersion of the electroplating solution, the coating thickness of the product will be uneven. The corrosion resistance of the coating mainly depends on the coating thickness and the exposure environment. The worse the use conditions, the thicker the coating is required. The corrosion resistance of the entire coating depends on the corrosion resistance of the weakest part of the coating, including the area with the smallest local thickness.

[0003] The coating thickness gauge using the magnetic thickness measurement method has higher accuracy. The magnetic principle thickness gauge can be used to accurately measure the paint layer on the steel surface, porcelain, enamel protective layer, plastic, rubber coating, and various non-ferrous metal electroplating layers including nickel and chromium.

[0004] At present, when measuring the thickness of a cylindrical alkaline zinc-nickel plated workpiece, an operator holds the cylindrical workpiece and places it on the periphery of a thickness gauge so that the thickness gauge fits the cylindrical workpiece to measure the thickness of the periphery of the cylindrical workpiece. However, this thickness measurement can only detect the thickness of a single point on the periphery of the cylindrical workpiece. The detection data is relatively simple and it is impossible to perform surrounding detection on the cylindrical workpiece. In addition, the labor intensity of manual surrounding detection is relatively high and the detection efficiency is relatively low. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides an alkaline zinc-nickel coating thickness detection device.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising a detection base plate, a fixed plate arranged at the top center of the detection base plate, and a detection movable ring located at the top center of the fixed plate, the detection base plate is a circular structure, the top of the detection base plate is connected to the bottom of the fixed plate through an arc bottom plate, the top two ends of the fixed plate are provided with fixed rings, the inner side of the fixed ring is provided with a detection component for detecting columnar structure materials, and the detection component includes:

[0007] An arc-shaped detection block that drives the movable plate inside the fixed ring to flip, the detection movable ring is arranged at the inner center of the fixed ring, a bearing is fixedly installed on one side of the bottom of the detection movable ring by bolts, a rotating shaft is fixedly installed at the central movable part of the bearing, the movable plate is fixedly installed on one end of the rotating shaft inside the detection movable ring by bolts, the arc-shaped detection block is fixedly installed on the other end of the rotating shaft by bolts, and the two ends of the other side of the arc-shaped detection block are connected to rotating columns through the bearings;

[0008] An annular limit seat drives the detection movable ring to rotate, the annular limit seat is fixedly installed at the center of one side of the top of the fixed ring by bolts, a rotating bottom plate is movably provided on the top of the annular limit seat, the detection movable ring is fixedly installed at the bottom center of the rotating bottom plate by bolts, an arc-shaped connecting plate is fixedly installed on one side of the detection movable ring on the bottom of the fixed ring by bolts, and both ends of one side of the arc-shaped connecting plate are connected to triangular limit blocks through a first support rod;

[0009] A triangular limit groove drives the arc detection block to flip, triangular limit grooves that match the size of the triangular limit block are opened at both ends of the bottom of the fixing ring, and the triangular limit block is arranged at the bottom center of the triangular limit groove, an arc limit strip is arranged between the triangular limit grooves on the fixing ring, and a rotating movable groove that matches the size of the rotating column is opened on one side of the top of the arc limit strip on the fixing ring, and both ends of the rotating movable groove are connected with the triangular limit grooves.

[0010] As a preferred technical solution of the present invention, a fixing hole is provided at the center of the fixing disk, an annular positioning seat is fixedly installed on the top of the fixing disk by bolts on the outer periphery of the fixing hole, an annular positioning groove is provided at the top center of the annular positioning seat, an annular positioning block is slidably connected to the annular positioning groove on the annular positioning seat, a rotating toothed disk movable at the top center of the annular positioning seat is fixedly installed between the tops of the annular positioning blocks by bolts, and a mounting hole matching the fixing hole is provided at the center of the rotating toothed disk.

[0011] A support seat is fixedly installed on the top of the fixed disk around the rotating gear disk by bolts, a support block is fixedly installed on one end of the top of the support seat by bolts, a support groove is opened on the top of the support block, a connecting block is slidably connected to the support groove on the support block, a positioning plate is fixedly installed between one side of the top of the connecting block by bolts, and an arc-shaped positioning strip is fixedly installed on one end of the top of the positioning plate by bolts.

[0012] As a preferred technical solution of the present invention, an arc-shaped rotating groove is opened around the rotating toothed disc, and a rotating limit bar is movably arranged in the arc-shaped rotating groove on the rotating toothed disc, and the top end of the rotating limit bar is fixedly mounted on the bottom of one end of the positioning plate by bolts, and the arc-shaped positioning bar is movably arranged around the top center of the rotating toothed disc;

[0013] A first hole is opened on the fixed disk at one side of the rotating toothed disk, and a first motor is fixedly installed on the fixed disk at the bottom center of the first hole by bolts, and an output end of the first motor is connected to a first gear meshing with the rotating toothed disk through a rotating shaft.

[0014] As a preferred technical solution of the present invention, a second hole is opened on the top of the fixing ring on one side of the annular limit seat, a second motor is fixedly installed on the fixing ring at the bottom center of the second hole by bolts, a rotating rack is fixedly installed at the top center of the rotating base plate by bolts, an output end of the second motor is connected to a second gear meshing with the rotating rack through a rotating shaft, an annular limit block is connected to the top of the annular limit seat through an annular limit groove, and the top end of the annular limit block is connected to the bottom of the rotating base plate.

[0015] A protective ring is fixedly installed on the top of the rotating base plate on the inner side of the rotating rack by bolts, and the protective ring is fixed to the outer side of the top of the rotating rack, the centers of the fixing ring and the fixing plate are on the same axis, electric telescopic rods are fixedly installed on both ends of the top of the fixing plate by bolts, and the top end of the electric telescopic rod is fixedly installed on both ends of the bottom of the arc-shaped connecting plate by bolts.

[0016] As a preferred technical solution of the present invention, a second support rod is fixedly installed at the center of the two outer ends of the arc-shaped limit strip by bolts, and the other end of the second support rod is fixedly installed on the two ends of one side of the arc-shaped connecting plate by bolts, and the rotating column moves on one side of the bottom of the fixing ring and in the rotating movable groove.

[0017] A first thickness gauge is installed at the center of one side of the movable plate, and a second thickness gauge is fixedly installed at the centers of both sides of the first thickness gauge on the movable plate. The bottom ends of the first thickness gauge and the second thickness gauge are fixedly installed on the movable plate through a telescopic rod.

[0018] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0019] 1. The arc-shaped rotating groove is used to drive the rotating limit bar to move. The rotating limit bar drives the positioning plate on the support block to move relative to each other during the movement, so that the arc-shaped positioning block on the top of the positioning plate can center and clamp the cylindrical workpiece, which is convenient for subsequent thickness measurement.

[0020] 2. The rotating base plate synchronously drives the movable detection ring in the fixed ring to rotate. The movable detection ring drives the arc detection block on the rotating shaft to move horizontally through the bearing. The movable plate on the rotating shaft is in a horizontal state. The first thickness gauge on the movable plate performs surrounding detection on the cylindrical workpiece. The surrounding detection is accurate and efficient.

[0021] 3. The rotating column is flipped to transform the movable plate on the rotating axis from a horizontal state to a vertical state. The second thickness gauges on both sides of the movable plate perform synchronous thickness measurement at both ends of the outer circumference of the cylindrical workpiece, thereby achieving multiple sets of surrounding detection of the cylindrical workpiece and improving the detection accuracy. The design is reasonable and ingenious, and the structural connection is stable and smooth.

[0022] 4. The fixed ring cooperates with the detection movable ring to realize the surrounding detection of the first thickness gauge on the movable plate on one side of the middle end of the cylindrical workpiece. After flipping, the second thickness gauge on the movable plate can realize the annular detection of both sides of the middle end of the cylindrical workpiece through the rotation movement, so as to achieve multi-directional coating thickness detection of the annular workpiece, with high detection efficiency and high detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the fixed disk structure of the present invention;

[0025] Figure 3 For the present invention Figure 2 Schematic diagram of the connection structure between the middle annular positioning seat and the support seat;

[0026] Figure 4 For the present invention Figure 1 Schematic diagram of the structure of the middle fixed ring;

[0027] Figure 5 For the present invention Figure 4 Schematic diagram of the structure of the middle annular limit seat;

[0028] Figure 6 For the present invention Figure 5 Schematic diagram of the connection structure between the middle annular limit seat and the fixed ring;

[0029] Figure 7 For the present invention Figure 6 Schematic diagram of the connection structure of the detection activity ring;

[0030] Figure 8 For the present invention Figure 7Schematic diagram of the middle fixed ring connection structure.

[0031] Among them: 10, detection base plate; 11, arc bottom plate; 20, fixed plate; 21, fixed hole; 22, annular positioning seat; 23, annular positioning groove; 24, annular positioning block; 25, rotating gear plate; 26, installation hole; 27, first hole; 28, first motor; 29, first gear; 30, detection movable ring; 31, movable plate; 32, arc detection block; 33, bearing; 34, rotating shaft; 35, rotating column; 36, first thickness gauge; 37, second thickness gauge; 40, fixed ring; 41, arc connecting plate; 42, first support rod; 43. Triangular limit block; 44. Triangular limit groove; 45. Arc limit strip; 46. Rotating movable groove; 47. Second hole; 48. Second motor; 49. Second support rod; 50. Annular limit seat; 51. Rotating bottom plate; 52. Rotating rack; 53. Protective ring; 54. Second gear; 55. Annular limit groove; 56. Annular limit block; 60. Support seat; 61. Support block; 62. Support groove; 63. Connecting block; 64. Positioning plate; 65. Arc positioning strip; 66. Rotating limit strip; 67. Arc rotating groove; 70. Electric telescopic rod. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0033] Embodiment: Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, it includes a detection base plate 10, a fixed plate 20 arranged at the top center of the detection base plate 10, and a detection movable ring 30 located at the top center of the fixed plate 20. The detection base plate 10 is a circular structure. The top of the detection base plate 10 is connected to the bottom of the fixed plate 20 through an arc bottom plate 11. Fixed rings 40 are arranged at both ends of the top of the fixed plate 20. The inner side of the fixed ring 40 is provided with a detection component for detecting columnar structure materials, and the detection component includes:

[0034] The movable plate 31 inside the fixed ring 40 is driven to flip the arc detection block 32. The inner center of the fixed ring 40 is provided with a detection movable ring 30. A bearing 33 is fixedly installed on one side of the bottom of the detection movable ring 30 by bolts. A rotating shaft 34 is fixedly installed at the central movable part of the bearing 33. The movable plate 31 is fixedly installed on the rotating shaft 34 at one end inside the detection movable ring 30 by bolts. The arc detection block 32 is fixedly installed on the other end of the rotating shaft 34 by bolts. The two ends of the other side of the arc detection block 32 are connected with rotating columns 35 through bearings 33. The arc detection block 32 is horizontally moved and vertically flipped by two sets of rotating columns 35.

[0035] The annular limit seat 50 drives the detection movable ring 30 to rotate. The annular limit seat 50 is fixedly installed at the center of one side of the top of the fixed ring 40 by bolts. The top of the annular limit seat 50 is movably provided with a rotating bottom plate 51, so that the rotating bottom plate 51 is stable and smooth during the rotation process, and at the same time drives the detection movable ring 30 to rotate synchronously. The detection movable ring 30 is fixedly installed at the bottom center of the rotating bottom plate 51 by bolts. On the bottom of the fixed ring 40, an arc-shaped connecting plate 41 is fixedly installed on one side of the detection movable ring 30 by bolts. Both ends of one side of the arc-shaped connecting plate 41 are connected to triangular limit blocks 43 through the first support rod 42. The rotating column 35 is offset by the triangular limit block 43, so that the rotating column 35 is switched from horizontal to vertical state. The structure is simple and stable.

[0036] The triangular limit groove 44 drives the arc detection block 32 to flip, and the two ends of the bottom of the fixed ring 40 are provided with triangular limit grooves 44 that match the size of the triangular limit block 43, and the triangular limit block 43 is arranged at the bottom center of the triangular limit groove 44, and an arc limit strip 45 is arranged between the triangular limit grooves 44 on the fixed ring 40, and a rotating movable groove 46 that matches the size of the rotating column 35 is opened on the top side of the arc limit strip 45 on the fixed ring 40, and the two ends of the rotating movable groove 46 are connected with the triangular limit groove 44. After entering the rotating movable groove 46 through the rotating column 35, the arc detection block 32 will be driven to rotate vertically, and then the thickness detection will produce the effect of multiple groups of measurements, thereby improving the accuracy.

[0037] See also Figure 2 and Figure 3A fixing hole 21 is provided at the center of the fixing disk 20, and an annular positioning seat 22 is fixedly installed on the top of the fixing disk 20 at the periphery of the fixing hole 21 by bolts. An annular positioning groove 23 is provided at the top center of the annular positioning seat 22, and an annular positioning block 24 is slidably connected in the annular positioning groove 23 on the annular positioning seat 22. A rotating toothed disk 25 movable at the top center of the annular positioning seat 22 is fixedly installed between the tops of the annular positioning blocks 24 by bolts, so that the rotating toothed disk 25 is stable during rotation, and an installation hole 26 matching the fixing hole 21 is provided at the center of the rotating toothed disk 25, which is convenient for the placement of cylindrical workpieces, improves detection efficiency, and reduces the labor intensity of operators.

[0038] A support seat 60 is fixedly installed on the top of the fixed disk 20 around the rotating gear disk 25 by bolts, and a support block 61 is fixedly installed on one end of the top of the support seat 60 by bolts. A support groove 62 is opened on the top of the support block 61, and a connecting block 63 is slidably connected in the support groove 62 on the support block 61. A positioning plate 64 is fixedly installed between one side of the top of the connecting block 63 by bolts, and an arc-shaped positioning strip 65 is fixedly installed on one end of the top of the positioning plate 64 by bolts, so that the arc-shaped positioning strip 65 on the positioning plate 64 can move relative to each other, thereby realizing the centered positioning and clamping of the cylindrical workpiece, which is convenient for detection.

[0039] See also Figure 1 , Figure 5 and Figure 6 , arc-shaped rotating grooves 67 are provided around the rotating gear disc 25, and a rotating limit bar 66 is movably provided in the arc-shaped rotating grooves 67 on the rotating gear disc 25, and the top of the rotating limit bar 66 is fixedly installed on the bottom of one end of the positioning plate 64 by bolts, and the arc-shaped positioning bars 65 are all movable around the top center of the rotating gear disc 25, and the positioning is accurate and stable;

[0040] A first hole 27 is opened on one side of the rotating toothed disc 25 on the fixed disc 20, and a first motor 28 is fixedly installed on the fixed disc 20 at the bottom center of the first hole 27 by bolts. The output end of the first motor 28 is connected to a first gear 29 meshing with the rotating toothed disc 25 through a rotating shaft, driving the rotating toothed disc 25 to rotate, and the structure is simple and stable.

[0041] See also Figure 1 , Figure 4 , Figure 5 , Figure 7 and Figure 8A second hole 47 is provided on the top of the fixing ring 40 on one side of the annular limiting seat 50, a second motor 48 is fixedly installed on the fixing ring 40 at the bottom center of the second hole 47 by bolts, a rotating rack 52 is fixedly installed at the top center of the rotating base plate 51 by bolts, an output end of the second motor 48 is connected to a second gear 54 meshing with the rotating rack 52 through a rotating shaft, driving the rotating base plate 51 to rotate stably in the annular limiting seat 50, an annular limiting block 56 is connected to the top of the annular limiting seat 50 through an annular limiting groove 55, and the top of the annular limiting block 56 is connected to the bottom of the rotating base plate 51 around, and the rotation is stable;

[0042] A protective ring 53 is fixedly installed on the top of the rotating base plate 51 on the inner side of the rotating rack 52 by bolts, and the protective ring 53 is fixed to the top outer side of the rotating rack 52. The centers of the fixed ring 40 and the fixed disk 20 are on the same axis. The structure is stable and the detection is accurate. Electric telescopic rods 70 are fixedly installed on both ends of the top of the fixed disk 20 by bolts. The top of the electric telescopic rod 70 is fixedly installed on the two ends of the bottom of the arc-shaped connecting plate 41 by bolts to measure the coating thickness at different heights of the cylindrical workpiece.

[0043] See also Figure 6 , Figure 7 and Figure 8 A second support rod 49 is fixedly installed at the center of the two outer ends of the arc-shaped limit strip 45 by bolts, and the other end of the second support rod 49 is fixedly installed on the two ends of one side of the arc-shaped connecting plate 41 by bolts. The rotating column 35 moves on one side of the bottom of the fixed ring 40 and in the rotating movable groove 46 to realize horizontal single detection and vertical two groups of surrounding detection.

[0044] A first thickness gauge 36 is installed at the center of one side of the movable plate 31, and a second thickness gauge 37 is fixedly installed at the centers of both sides of the first thickness gauge 36 on the movable plate 31. The bottom ends of the first thickness gauge 36 and the second thickness gauge 37 are fixedly installed on the movable plate 31 through telescopic rods. The distance is adjusted to meet the requirements of coating thickness measurement for cylindrical workpieces with different inner diameters. Multiple detection methods can improve the detection accuracy of coating thickness.

[0045] Working principle: The cylindrical workpiece is passed through the fixing ring 40 and enters the fixing hole 21. The first motor 28 on the fixing disk 20 drives the first gear 29 to rotate. The first gear 29 engages and drives the rotating toothed disk 25 on the annular positioning seat 22 to rotate stably. The rotating toothed disk 25 drives the rotating limit bar 66 to move by using the arc-shaped rotating groove 67 during rotation. The rotating limit bar 66 drives the positioning plate 64 on the support block 61 to move relative to each other during movement. At this time, the arc-shaped positioning block on the top of the positioning plate 64 centers and clamps the cylindrical workpiece, which is convenient for subsequent thickness measurement.

[0046] The second motor 48 on the fixed ring 40 drives the second gear 54 to rotate, and the second gear 54 meshes with the rotating rack 52 to drive the rotating base plate 51 on the annular limit seat 50 to rotate stably. The rotating base plate 51 synchronously drives the movable detection ring in the fixed ring 40 to rotate, and the movable detection ring drives the arc detection block 32 on the rotating shaft 34 to move horizontally through the bearing 33. When the rotating column 35 on one side of the arc detection block 32 moves on the bottom side of the fixed ring 40, the movable plate 31 at the other end of the rotating shaft 34 is in a horizontal state. At this time, the first thickness gauge 36 on the movable plate 31 performs a surrounding detection on the cylindrical workpiece;

[0047] When the rotating column 35 on one side of the arc detection block 32 runs into the triangular limit block 43, the front end rotating column 35 enters first through the triangular limit groove 44 on the triangular limit block 43. At this time, the arc detection block 32 is flipped over by the entry of the rotating column 35, so that the movable plate at the other end of the rotating shaft 34 is transformed from a horizontal state to a vertical state. During the continuous rotation, the rotating column 35 will enter the rotating movable groove 46 on the arc limit strip 45. At this time, the rotating column 35 is limited by the rotating movable groove 46, so that the arc detection block 32 is always in a vertical angle rotation movement. At this time, the second thickness gauges 37 on both sides of the movable plate 31 perform synchronous thickness measurement at both ends of the outer periphery of the cylindrical workpiece, so as to achieve multiple groups of surrounding detection of the cylindrical workpiece, improve the detection accuracy, and have a reasonable and ingenious design and a stable and smooth structural connection.

[0048] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An alkaline zinc-nickel coating thickness detection device, comprising a detection base plate (10), a fixed plate (20) arranged at the top center of the detection base plate (10), and a detection movable ring (30) located at the top center of the fixed plate (20), characterized in that: The detection base plate (10) is a circular structure. The top of the detection base plate (10) is connected to the bottom of the fixed plate (20) via an arc-shaped base plate (11). Fixed rings (40) are provided at both ends of the top of the fixed plate (20). A detection component for detecting columnar structure materials is provided inside the fixed ring (40), and the detection component includes: an arc-shaped detection block (32) for driving the movable plate (31) inside the fixed ring (40) to perform a flipping movement, the movable detection ring (30) being arranged at the inner center of the fixed ring (40), a bearing (33) being fixedly mounted on one side of the bottom of the movable detection ring (30) by means of bolts, a rotating shaft (34) being fixedly mounted at the central movable part of the bearing (33), the movable plate (31) being fixedly mounted on one end of the rotating shaft (34) inside the movable detection ring (30) by means of bolts, the arc-shaped detection block (32) being fixedly mounted on the other end of the rotating shaft (34) by means of bolts, and the other two ends of the arc-shaped detection block (32) being connected to rotating columns (35) via the bearings (33); an annular limit seat (50) driving the detection movable ring (30) to rotate, the annular limit seat (50) being fixedly mounted at the center of one side of the top of the fixed ring (40) by bolts, a rotating bottom plate (51) being movably arranged at the top of the annular limit seat (50), the detection movable ring (30) being fixedly mounted at the bottom center of the rotating bottom plate (51) by bolts, an arc-shaped connecting plate (41) being fixedly mounted on one side of the detection movable ring (30) by bolts on the bottom of the fixed ring (40), and both ends of one side of the arc-shaped connecting plate (41) being connected to triangular limit blocks (43) by a first support rod (42); A triangular limit groove (44) is provided on the bottom ends of the fixing ring (40) to match the size of the triangular limit block (43), and the triangular limit block (43) is arranged at the bottom center of the triangular limit groove (44). An arc-shaped limit strip (45) is arranged on the fixing ring (40) between the triangular limit grooves (44). A rotating movable groove (46) matching the size of the rotating column (35) is provided on the fixing ring (40) on one side of the top of the arc-shaped limit strip (45), and the two ends of the rotating movable groove (46) are connected to the triangular limit groove (44).

2. The alkaline zinc-nickel coating thickness detection device according to claim 1, characterized in that: A fixing hole (21) is provided at the center of the fixing disk (20); an annular positioning seat (22) is fixedly mounted on the top of the fixing disk (20) at the periphery of the fixing hole (21) by means of bolts; an annular positioning groove (23) is provided at the center of the top of the annular positioning seat (22); an annular positioning block (24) is slidably connected to the annular positioning groove (23) on the annular positioning seat (22); a rotating toothed disk (25) movable at the center of the top of the annular positioning seat (22) is fixedly mounted between the tops of the annular positioning blocks (24) by means of bolts; and a mounting hole (26) matching the fixing hole (21) is provided at the center of the rotating toothed disk (25).

3. An alkaline zinc-nickel coating thickness detection device according to claim 2, characterized in that: A support seat (60) is fixedly mounted on the top of the fixed disk (20) around the rotating gear disk (25) by bolts, a support block (61) is fixedly mounted on one end of the top of the support seat (60) by bolts, a support groove (62) is provided on the top of the support block (61), a connecting block (63) is slidably connected to the support groove (62) on the support block (61), a positioning plate (64) is fixedly mounted between one side of the top of the connecting block (63) by bolts, and an arc-shaped positioning strip (65) is fixedly mounted on one end of the top of the positioning plate (64) by bolts.

4. The alkaline zinc-nickel coating thickness detection device according to claim 3, characterized in that: The rotating toothed disc (25) is provided with an arc-shaped rotating groove (67) at the periphery thereof, and a rotating limit bar (66) is movably provided in the arc-shaped rotating groove (67) on the rotating toothed disc (25), and the top end of the rotating limit bar (66) is fixedly mounted on the bottom end of the positioning plate (64) by bolts, and the arc-shaped positioning bar (65) is movably arranged at the periphery of the top center of the rotating toothed disc (25); A first hole (27) is formed on the fixed disk (20) at one side of the rotating toothed disk (25); a first motor (28) is fixedly mounted on the fixed disk (20) at the bottom center of the first hole (27) by means of bolts; an output end of the first motor (28) is connected to a first gear (29) meshingly connected to the rotating toothed disk (25) via a rotating shaft.

5. The alkaline zinc-nickel coating thickness detection device according to claim 1, characterized in that: A second hole (47) is provided on the top of the fixing ring (40) on one side of the annular limiting seat (50); a second motor (48) is fixedly mounted on the fixing ring (40) at the bottom center of the second hole (47) by means of bolts; a rotating rack (52) is fixedly mounted at the top center of the rotating base plate (51) by means of bolts; an output end of the second motor (48) is connected to a second gear (54) meshingly connected to the rotating rack (52) via a rotating shaft; an annular limiting block (56) is connected to the top of the annular limiting seat (50) via an annular limiting groove (55) provided thereon, and a top end of the annular limiting block (56) is connected to the bottom periphery of the rotating base plate (51).

6. The alkaline zinc-nickel coating thickness detection device according to claim 1, characterized in that: A second support rod (49) is fixedly mounted at the center of the two outer ends of the arc-shaped limiting strip (45) by means of bolts, and the other end of the second support rod (49) is fixedly mounted at the two ends of one side of the arc-shaped connecting plate (41) by means of bolts, and the rotating column (35) moves on one side of the bottom of the fixing ring (40) and in the rotating movable groove (46).

7. The alkaline zinc-nickel coating thickness detection device according to claim 6, characterized in that: A first thickness gauge (36) is installed at the center of one side of the movable plate (31), and second thickness gauges (37) are fixedly installed on the movable plate (31) at the centers of both sides of the first thickness gauge (36), and one end of the bottom of the first thickness gauge (36) and the second thickness gauge (37) are fixedly installed on the movable plate (31) via a telescopic rod.

8. The alkaline zinc-nickel coating thickness detection device according to claim 5, characterized in that: A protective ring (53) is fixedly mounted on the top of the rotating base plate (51) on the inner side of the rotating rack (52) by means of bolts, and the protective ring (53) is fixed to the outer side of the top of the rotating rack (52), the centers of the fixing ring (40) and the fixing plate (20) are on the same axis, the electric telescopic rod (70) is fixedly mounted on both ends of the top of the fixing plate (20) by means of bolts, and the top end of the electric telescopic rod (70) is fixedly mounted on both ends of the bottom of the arc-shaped connecting plate (41) by means of bolts.

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