A surface flatness detection platform for special steel plates

Abstract

The present invention relates to the field of flatness detection technology, and proposes a surface flatness detection platform for special steel plates, comprising a frame, the outer surface of the frame being rotatably connected to a main roller, the outer surface of the main roller being spaced with a plurality of groups of main conveyor belts, the outer surface of the frame being fixedly connected to a main servo motor at one end corresponding to the main roller, the upper end of the frame being respectively provided with a wave detection structure and an interval detection structure, the inner side of the frame being provided with a support assembly near the lower end of the interval detection structure and the wave detection structure, the inner side of the frame being provided with a rejection structure near the conveying end of the main conveyor belt, and the outer surface of the frame being fixedly connected to a control computer. Through the above technical solution, the problem that the existing surface flatness detection platform for special steel plates intuitively reflects the flatness condition through coating and visual inspection, but has no way to detect some steel materials that do not require coating, or the film on the surface of the steel plate needs to be removed after coating, and the application range is small is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of flatness detection, and in particular to a surface flatness detection platform for special steel plates. Background Art

[0002] Special steel is generally considered to be steel with special chemical composition, produced by special process, with special structure and properties, and can meet special needs. For example, alloyed steel is used in some special mechanical equipment, such as high-strength weapon materials or automotive steel plates.

[0003] Existing methods for testing steel plates include handheld detectors, which detect the flatness of the steel plate by pressing and rolling different areas on the surface of the steel plate;

[0004] A search revealed an intelligent machine vision-based flatness detection device and method for decorative sheet materials, with authorization publication number CN117213411B. This device and method automatically detect the flatness of sheet surfaces by attaching a transparent film to the surface of the sheet to expose the unevenness of the sheet surface, allowing for rapid and accurate determination of the sheet surface flatness. This addresses the issues with traditional sheet detection devices, which are cumbersome to operate and prone to misjudgment.

[0005] However, the above-mentioned existing special steel plate surface flatness detection platform intuitively reflects the flatness through lamination and visual inspection, but there is no way to detect some steels that do not require lamination, or the film on the surface of the steel plate needs to be removed after lamination, and the application range is small. For this reason, we propose a special steel plate surface flatness detection platform. Summary of the Invention

[0006] The present invention proposes a surface flatness detection platform for special steel plates, which solves the problem mentioned in the background technology that the existing surface flatness detection platform for special steel plates intuitively reflects the flatness through coating and visual detection, but has no way to detect some steels that do not require coating, or the film on the surface of the steel plate needs to be removed after coating, resulting in a small scope of application.

[0007] The technical solutions of the present invention are as follows:

[0008] A surface flatness detection platform for special steel plates includes a frame, the outer surface of the frame is rotatably connected to a main roller, the outer surface of the main roller is spaced apart with a plurality of main conveyor belts, the outer surface of the frame is fixedly connected to a main servo motor at one end corresponding to the main roller, the upper end of the frame is respectively provided with a wave detection structure and an interval detection structure, the inner side of the frame is provided with a support assembly near the lower end of the interval detection structure and the wave detection structure, the inner side of the frame is provided with a rejection structure near the conveying end of the main conveyor belt, the outer surface of the frame is fixedly connected to a control computer, and the control computer is used to control the automatic detection operation of the entire detection platform;

[0009] The wave detection structure includes a support frame fixedly connected to the outer surface of the frame body, the inner side of the support frame is rotatably connected to a screw, the inner side of the support frame is fixedly connected to a guide rod, a fixed block is fixedly connected between the guide rod, the screw and the support frame, the outer surface of the support frame is fixedly connected to a detection motor at one end of the screw, the outer surfaces of the guide rod and the screw are jointly movably sleeved with a slider, the lower end of the slider is fixedly connected to an electric cylinder, and the output end of the electric cylinder is fixedly connected to a detector.

[0010] As a further technical solution of the present invention, the interval detection structure includes a fixed frame fixedly connected to the outer surface of the frame body, the lower end of the fixed frame is fixedly connected to a slide rail, the outer surface of the slide rail is slidably connected to a sliding block, the lower end of the sliding block is fixedly connected to a fixed column, the lower end inner side of the fixed column is slidably connected to a sliding column, one end of the sliding column is rotatably connected to a roller, one side outer surface of the fixed frame is fixedly connected to a telescopic cylinder, the lower end of the fixed column is provided with a telescopic cylinder inwardly, the outer surface of the fixed column is provided with a strip groove, the outer surface of the sliding column is fixedly connected to a protrusion, and a pushing spring is provided inside the fixed column, and the elastic end of the pushing spring is connected to a pressure sensor.

[0011] As a further technical solution of the present invention, the rejection structure includes a connecting frame fixedly connected to the outer surface of the frame body, the upper end of the connecting frame is fixedly connected to an electric telescopic rod, the output end of the electric telescopic rod is fixedly connected to a pushing bracket, the outer surface of the pushing bracket is rotatably connected to a rejection roller, and the outer surface of the pushing bracket is fixedly connected to a rejection motor at one end corresponding to the rejection roller.

[0012] As a further technical solution of the present invention, the support assembly includes a secondary conveying roller and a reinforcement roller which are respectively rotatably connected to the inner side of the frame body near the wave detection structure and the interval detection structure. A secondary conveying belt is wound around the outer surface of the secondary conveying roller. The secondary conveying belt is located in the gap between the main conveyor belts. A secondary servo motor is fixedly connected to the outer surface of the frame body corresponding to one end of the secondary conveying roller.

[0013] As a further technical solution of the present invention, the fixed block is fixedly connected to both the guiding rod and the support frame. The outer surface of the screw rod is provided with threads, and the threads are symmetrically distributed with the fixed block as the axis. The screw rod is rotationally connected to the fixed block through a bearing. The output end of the detection motor is fixedly connected to one end of the screw rod. The screw rod is threadedly connected to the slider, and the detection motor is a variable-frequency motor.

[0014] As a further technical solution of the present invention, the slider is slidably connected to the guiding rod. The number of sliders is two groups and they are symmetrically distributed. By rotating the screw rod forward and backward, the slider slides back and forth along the length direction of the guiding rod. By extending the electric cylinder downward, the detector detects the flatness of the steel plate surface. The detector is signal-connected to the control computer.

[0015] As a further technical solution of the present invention, the fixed frame is an inverted "U" - shaped bracket structure. The number of fixed columns is several groups and they are distributed in a "one" - shaped array. The output end of the telescopic cylinder is fixedly connected to the outermost group of fixed columns. By the telescopic operation of the telescopic cylinder, several groups of fixed columns move back and forth along the length direction of the slide rail, and the sliding column moves along the length direction of the telescopic cylinder inside the fixed column.

[0016] As a further technical solution of the present invention, the elastic direction of the pushing spring is the same as the length direction of the telescopic cylinder. The pressure sensor is signal - connected to the control computer. By the sliding column pushing the pressure sensor upward, the flatness of the plate surface is detected. The other elastic end of the pushing spring is fixedly connected to the sliding block.

[0017] As a further technical solution of the present invention, the rejecting roller corresponds to the gaps between the spaced - apart main conveyor belts. By extending and contracting the electric telescopic rod, the height of the rejecting roller is adjusted. By driving the rejecting roller to rotate by the rejecting motor, the conveying direction of the rejecting roller is tangent to the direction of the main conveyor belt, and the conveying direction of the rejecting roller is away from the side of the control computer. The electric telescopic rod and the rejecting motor are both signal - connected to the control computer.

[0018] As a further technical solution of the present invention, the number of secondary conveyor rollers is several groups. The strengthening roller is located in the middle position near the upper end between two adjacent secondary conveyor rollers, and the topmost end of the strengthening roller is flush with the topmost end of the secondary conveyor roller. The secondary servo motor is used to drive the secondary conveyor roller to rotate. The rotation speed of the secondary conveyor roller is the same as the conveying speed of the main roller, and their conveying directions are the same. The uppermost end and the inner side of the secondary conveyor belt are flush with the uppermost end and the inner side of the main conveyor belt.

[0019] The working principle and beneficial effects of the present invention are as follows:

[0020] In the present invention, the wave detection structure can make the screw rotate forward and backward, and the detector can move back and forth in a direction perpendicular to the plate conveying direction, thereby forming a back and forth wave-like detection effect through the transportation of the main conveyor belt and the detection of the detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 Schematic diagram of the detection platform structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Structural diagram from another perspective;

[0024] Figure 3 It is a structural schematic diagram of the wave detection structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the local structure of the interval detection structure of the present invention;

[0026] Figure 5 For the present invention Figure 4 A schematic diagram of the local structure at the fixed column from another perspective;

[0027] Figure 6 This is a partial structural diagram of the present invention's elimination structure disassembly and installation;

[0028] Figure 7 It is a schematic diagram of the local structure of the support assembly of the present invention.

[0029] In the figure: 1. frame; 2. main roller; 3. main conveyor belt; 4. wave detection structure; 41. support frame; 42. screw; 43. guide rod; 44. fixed block; 45. detection motor; 46. electric cylinder; 47. detector; 48. slider; 5. interval detection structure; 51. fixed frame; 52. slide rail; 53. sliding block; 54. fixed column; 55. sliding column; 56. roller; 57. telescopic cylinder; 58. strip groove; 59. bump; 510. push spring; 511. pressure sensor; 6. support assembly; 61. secondary conveyor roller; 62. reinforcement roller; 63. secondary conveyor belt; 64. secondary servo motor; 7. rejection structure; 71. connecting frame; 72. electric telescopic rod; 73. push bracket; 74. rejection roller; 75. rejection motor; 8. control computer; 9. main servo motor. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention. Example

[0031] like Figures 1 to 3 As shown, this embodiment proposes a surface flatness detection platform for special steel plates, including a frame 1, the outer surface of the frame 1 is rotatably connected to a main roller 2, the outer surface of the main roller 2 is spaced apart with a plurality of groups of main conveyor belts 3, the outer surface of the frame 1 is fixedly connected to one end corresponding to the main roller 2 with a main servo motor 9, the upper end of the frame 1 is respectively provided with a wave detection structure 4 and an interval detection structure 5, the inner side of the frame 1 is provided with a support assembly 6 near the lower end of the interval detection structure 5 and the wave detection structure 4, the inner side of the frame 1 is provided with a rejection structure 7 near the conveying end of the main conveyor belt 3, the outer surface of the frame 1 is fixedly connected to a control computer 8, and the control computer 8 is used to control the automatic detection operation of the entire detection platform;

[0032] The wave detection structure 4 includes a support frame 41 fixedly connected to the outer surface of the frame body 1, a screw 42 is rotatably connected to the inner side of the support frame 41, a guide rod 43 is fixedly connected to the inner side of the support frame 41, a fixed block 44 is fixedly connected between the guide rod 43, the screw 42 and the support frame 41, a detection motor 45 is fixedly connected to the outer surface of the support frame 41 corresponding to one end of the screw 42, a slider 48 is movably connected to the outer surfaces of the guide rod 43 and the screw 42, the lower end of the slider 48 is fixedly connected to the electric cylinder 46, and the output end of the electric cylinder 46 is fixedly connected to the detector 47.

[0033] The fixed block 44 is fixedly connected to the guide rod 43 and the support frame 41. The outer surface of the screw 42 is provided with a thread, and the thread is symmetrically distributed with the fixed block 44 as the axis. The screw 42 forms a rotational connection with the fixed block 44 through a bearing. The output end of the detection motor 45 is fixedly connected to one end of the screw 42. The screw 42 and the slider 48 are threadedly connected. The detection motor 45 is a variable frequency motor; the slider 48 and the guide rod 43 are slidably connected. There are two groups of sliders 48 and they are symmetrically distributed. The slider 48 slides back and forth along the length direction of the guide rod 43 through the forward and reverse rotation of the screw 42. The detector 47 detects the flatness of the steel plate surface by extending downward through the electric cylinder 46. The detector 47 is connected to the control computer 8 for signals.

[0034] In this embodiment, the screw 42 can rotate forward and backward, and the detector 47 can move back and forth in a direction perpendicular to the sheet conveying direction. Thus, through the cooperation of the conveying of the main conveyor belt 3 and the detection of the detector 47, a back-and-forth wavy detection effect can be formed. Embodiment

[0035] As Figure 4~Figure 5 As shown, on the basis of Embodiment 1, a spaced detection structure 5 is further proposed, which includes a fixing frame 51 fixedly connected to the outer surface of the frame body 1. The lower end of the fixing frame 51 is fixedly connected with a slide rail 52. The outer surface of the slide rail 52 is slidably connected with a slide block 53. The lower end of the slide block 53 is fixedly connected with a fixing column 54. The inner side of the lower end of the fixing column 54 is slidably connected with a slide column 55. One end of the slide column 55 is rotatably connected with a roller 56. One side outer surface of the fixing frame 51 is fixedly connected with a telescopic cylinder 57. The lower end of the fixing column 54 is internally provided with the telescopic cylinder 57. A strip-shaped groove 58 is provided on the outer surface of the fixing column 54. A convex block 59 is fixedly connected to the outer surface of the slide column 55. A top spring 510 is arranged inside the fixing column 54. The elastic end of the top spring 510 is connected with a pressure sensor 511.

[0036] The fixing frame 51 is an inverted "U"-shaped bracket structure. The number of the fixing columns 54 is several groups and they are distributed in a "one"-shaped array. The output end of the telescopic cylinder 57 is fixedly connected with the outermost group of fixing columns 54. Through the telescopic operation of the telescopic cylinder 57, several groups of fixing columns 54 move back and forth along the length direction of the slide rail 52, and the slide column 55 moves along the length direction of the telescopic cylinder 57 inside the fixing column 54. The elastic direction of the top spring 510 is the same as the length direction of the telescopic cylinder 57. The pressure sensor 511 is in signal connection with the control computer 8. The flatness of the sheet surface is detected by the slide column 55 pushing up the pressure sensor 511. The other elastic end of the top spring 510 is fixedly connected with the slide block 53. <0,000090>

[0037] In this embodiment, the flatness of different parts of the steel plate surface can be monitored in a spaced strip shape. At the same time, several fixing columns 54 as a whole can move back and forth in a direction perpendicular to the sheet conveying direction. The flatness of different parts of the sheet can be detected as needed, which can make the final detection result more accurate. Embodiment

[0038] As <00000,95>As shown, on the basis of Embodiment 2, a rejection structure 7 is further proposed, which includes a connecting frame 71 fixedly connected to the outer surface of the frame body 1. The upper end of the connecting frame 71 is fixedly connected with an electric telescopic rod 72. The output end of the electric telescopic rod 72 is fixedly connected with a pushing support 73. The outer surface of the pushing support 73 is rotatably connected with a rejection roller 74. A rejection motor 75 is fixedly connected to the outer surface of the pushing support 73 corresponding to one end of the rejection roller 74.

[0039] The reject roller 74 corresponds to the gaps between the spaced main conveyor belts 3. The height of the reject roller 74 is adjusted by extending and contracting the electric telescopic rod 72. The reject roller 74 is driven to rotate by the reject motor 75. The conveying direction of the reject roller 74 is tangent to the direction of the main conveyor belt 3. The conveying direction of the reject roller 74 is away from the control computer 8. The electric telescopic rod 72 and the reject motor 75 are both connected to the control computer 8 for signals.

[0040] In this embodiment, when the main conveyor belt 3 is conveying the plates, unqualified plates can be lifted up and the effect of rejection and conveying can be achieved; during use, when the control computer 8 detects that the plates are unqualified, the control computer 8 can automatically control the electric telescopic rod 72 to extend, so that the height of the rejection roller 74 is higher than the height of the main conveyor belt 3. At this time, the plates are lifted up, and then the rejection roller 74 is driven to rotate by the rejection motor 75, so that the plates can be transported to one side of the frame 1, and qualified products continue to be transported along the conveying direction of the main conveyor belt 3, so that unqualified products can be automatically rejected according to the flatness detection results. Example

[0041] like Figure 7 As shown, on the basis of Example 3, it is further proposed that the support assembly 6 includes a secondary conveying roller 61 and a reinforcing roller 62 which are respectively rotatably connected to the inner side of the frame 1 near the wave detection structure 4 and the interval detection structure 5, and a secondary conveying belt 63 is wound around the outer surface of the secondary conveying roller 61. The secondary conveying belt 63 is located in the gap between the main conveying belts 3, and a secondary servo motor 64 is fixedly connected to the outer surface of the frame 1 at one end of the secondary conveying roller 61.

[0042] There are several groups of secondary conveyor rollers 61. The reinforcing roller 62 is located in the middle position near the upper end between two adjacent groups of secondary conveyor rollers 61, and the top end of the reinforcing roller 62 is flush with the top end of the secondary conveyor roller 61. The secondary servo motor 64 is used to drive the secondary conveyor roller 61 to rotate. The rotation speed of the secondary conveyor roller 61 is the same as the conveying speed of the main roller 2, and the conveying directions of the two are the same. The top end and inner side of the secondary conveyor belt 63 are flush with the top end and inner side of the main conveyor belt 3.

[0043] In this embodiment, the main conveyor belt 3 and the secondary conveyor belt 63 can be flush with each other, so the plate can be effectively supported when it is conveyed to the detection area of ​​the interval detection structure 5 and the wave detection structure 4, thereby effectively maintaining the accuracy of the plate flatness detection results of the wave detection structure 4 and the interval detection structure 5, and avoiding inaccurate detection caused by the possible downward local bending of the plate.

[0044] In summary, when in use, the main servo motor 9 is operated to enable the main conveyor belt 3 to convey the plate. When the plate is conveyed to the lower end of the wave detection structure 4, the electric cylinder 46 extends downward to drive the detector 47, so that the detector 47 pushes the plate with a constant pressure. In the process of plate conveying, the detection motor 45 first drives the screw 42 to rotate forward, so that the two sets of sliders 48 move away from each other. When the two sets of sliders 48 are away from each other to the maximum distance, the detection motor 45 drives the screw 42 to rotate to achieve the two sets of sliders 48 approaching each other to the closest distance. At this time, the slider 48 is in contact with the fixed block 44, and the detection motor 45 drives the screw 42 to rotate forward and reverse to drive the slider 48 to move back and forth. In conjunction with the conveying effect of the main conveyor belt 3 on the plate, a wave area detection effect can be formed on the outer surface of the plate. At the same time, the frequency conversion effect of the detection motor 45 can be used to adjust the rotation speed of the screw 42, so that the wave detection can be encrypted or loosened. It can be adjusted according to actual needs. Finally, the detector 47 transmits the detection result to the control computer 8 for intuitive display, and the control computer 8 intuitively displays whether the plate is qualified.

[0045] When the plate is transported to the lower end area of ​​the interval detection structure 5, the roller 56 rolls on the outer surface of the plate, and the roller 56 pushes the sliding column 55 upward, and the sliding column 55 pushes the pressure sensor 511, and the pressure value is fed back to the control computer 8 through the pressure sensor 511. When the flatness changes, it means that there is an obvious difference in the flatness of the plate. At the same time, the protrusion 59 is stuck on the inner side of the strip groove 58 to maintain the lowest distance of the sliding column 55. The action of the pushing spring 510 is realized to ensure that the detection end of the pressure sensor 511 is always at the bottom when detecting the plate. It fits with the sliding column 55, thereby maintaining the accuracy of the pressure detection by the pressure sensor 511. During use, the sliding block 53 can move back and forth along the length of the slide rail 52 by pushing and contracting the fixed column 54 through the telescopic cylinder 57, so that the lower end of the roller 56 can contact different areas of the steel surface in the conveying direction of the main conveyor belt 3, thereby detecting different areas of the steel surface. The pressure detected by the pressure sensor 511 is fed back to the control computer 8, and the control computer 8 intuitively displays whether the plate is qualified.

[0046] It should be noted that during use, when the control computer 8 detects that the plate is unqualified, the control computer 8 can automatically control the electric telescopic rod 72 to extend, so that the height of the rejection roller 74 is higher than the height of the main conveyor belt 3. At this time, the plate is lifted up, and then the rejection roller 74 is driven to rotate by the rejection motor 75, so that the plate can be transported to one side of the frame 1, and the qualified products continue to be transported along the conveying direction of the main conveyor belt 3, so that the unqualified products can be automatically rejected according to the flatness detection results.

[0047] It should be noted that during use, the secondary conveyor belt 63 and the main conveyor belt 3 can be supported by the secondary conveyor roller 61 and the reinforcing roller 62. By making the conveying speed of the secondary conveyor belt 63 the same as that of the main conveyor belt 3, the stability of the plate can be effectively maintained, avoiding the problem of inaccurate detection of the wave detection structure 4 or the interval detection structure 5 due to local bending of the plate due to gravity, and making the final detection result more accurate.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A surface flatness detection platform for special steel plates, comprising a frame (1), wherein the outer surface of the frame (1) is rotatably connected to a main roller (2), the outer surface of the main roller (2) is provided with a plurality of groups of main conveyor belts (3) wound therearound, and a main servo motor (9) is fixedly connected to one end of the outer surface of the frame (1) corresponding to the main roller (2), characterized in that: The upper end of the frame (1) is provided with a wave detection structure (4) and an interval detection structure (5), respectively; the inner side of the frame (1) is provided with a support assembly (6) near the lower end of the interval detection structure (5) and the wave detection structure (4); the inner side of the frame (1) is provided with a rejection structure (7) near the conveying end of the main conveyor belt (3); the outer surface of the frame (1) is fixedly connected with a control computer (8), and the control computer (8) is used to control the automatic detection operation of the entire detection platform; The wave detection structure (4) includes a support frame (41) fixedly connected to the outer surface of the frame body (1), the inner side of the support frame (41) is rotatably connected to a screw rod (42), the inner side of the support frame (41) is fixedly connected to a guide rod (43), a fixed block (44) is fixedly connected between the guide rod (43), the screw rod (42) and the support frame (41), a detection motor (45) is fixedly connected to the outer surface of the support frame (41) corresponding to one end of the screw rod (42), a slider (48) is movably sleeved on the outer surfaces of the guide rod (43) and the screw rod (42), the lower end of the slider (48) is fixedly connected to an electric cylinder (46), and the output end of the electric cylinder (46) is fixedly connected to a detector (47); The interval detection structure (5) includes a fixed frame (51) fixedly connected to the outer surface of the frame body (1), the lower end of the fixed frame (51) is fixedly connected to a slide rail (52), the outer surface of the slide rail (52) is slidably connected to a sliding block (53), the lower end of the sliding block (53) is fixedly connected to a fixed column (54), the inner side of the lower end of the fixed column (54) is slidably connected to a sliding column (55), one end of the sliding column (55) is rotatably connected to a roller (56), one side outer surface of the fixed frame (51) is fixedly connected to a telescopic cylinder (57), the lower end of the fixed column (54) is provided with a telescopic cylinder (57) inwardly, the outer surface of the fixed column (54) is provided with a strip groove (58), the outer surface of the sliding column (55) is fixedly connected to a protrusion (59), the interior of the fixed column (54) is provided with a push spring (510), and the elastic end of the push spring (510) is connected to a pressure sensor (511); The rejection structure (7) includes a connecting frame (71) fixedly connected to the outer surface of the frame body (1), the upper end of the connecting frame (71) is fixedly connected to an electric telescopic rod (72), the output end of the electric telescopic rod (72) is fixedly connected to a jacking bracket (73), the outer surface of the jacking bracket (73) is rotatably connected to a rejection roller (74), and the outer surface of the jacking bracket (73) is fixedly connected to a rejection motor (75) at one end corresponding to the rejection roller (74).

2. The special steel plate surface flatness detection platform according to claim 1, characterized in that: The support component (6) includes a secondary conveying roller (61) and a reinforcing roller (62) which are respectively rotatably connected to the inner side of the frame body (1) near the wave detection structure (4) and the interval detection structure (5). A secondary conveyor belt (63) is wound around the outer surface of the secondary conveying roller (61). The secondary conveyor belt (63) is located in the gap between the main conveyor belts (3). A secondary servo motor (64) is fixedly connected to the outer surface of the frame body (1) corresponding to one end of the secondary conveying roller (61).

3. The special steel plate surface flatness detection platform according to claim 1, characterized in that: The fixed block (44) is fixedly connected to both the guide rod (43) and the support frame (41). Threads are provided on the outer surface of the screw rod (42), and the threads are symmetrically distributed with the fixed block (44) as the axis. The screw rod (42) is rotatably connected to the fixed block (44) through a bearing. The output end of the detection motor (45) is fixedly connected to one end of the screw rod (42). The screw rod (42) is threadedly connected to the slider (48). The detection motor (45) is a variable-frequency motor.

4. The special steel plate surface flatness detection platform according to claim 3, characterized in that: The slider (48) is slidably connected to the guide rod (43). The number of sliders (48) is two groups and they are symmetrically distributed. By rotating the screw rod (42) forward and backward, the slider (48) slides back and forth along the length direction of the guide rod (43). By extending the electric cylinder (46) downward, the flatness of the steel plate surface is detected by the detector (47). The detector (47) is signal-connected to the control computer (8).

5. The special steel plate surface flatness detection platform according to claim 1, characterized in that: The fixed frame (51) is an inverted "U"-shaped bracket structure. The number of fixed columns (54) is several groups and they are distributed in a "one"-shaped array. The output end of the telescopic cylinder (57) is fixedly connected to the outermost group of fixed columns (54). By the telescopic operation of the telescopic cylinder (57), several groups of fixed columns (54) move back and forth along the length direction of the slide rail (52). The sliding column (55) moves along the length direction of the telescopic cylinder (57) inside the fixed column (54).

6. The special steel plate surface flatness detection platform according to claim 5, characterized in that: The elastic direction of the jacking spring (510) is the same as the length direction of the telescopic cylinder (57). The pressure sensor (511) is signal-connected to the control computer (8). By the sliding column (55) jacking up the pressure sensor (511), the flatness of the plate surface is detected. The other elastic end of the jacking spring (510) is fixedly connected to the sliding block (53).

7. The special steel plate surface flatness detection platform according to claim 1, characterized in that: The rejection roller (74) corresponds to the gaps between the spaced main conveyor belts (3). By extending and contracting the electric telescopic rod (72), the height of the rejection roller (74) is adjusted. By driving the rejection roller (74) to rotate by the rejection motor (75), the conveying direction of the rejection roller (74) is tangent to the direction of the main conveyor belt (3). The conveying direction of the rejection roller (74) is away from the side of the control computer (8). The electric telescopic rod (72) and the rejection motor (75) are both signal-connected to the control computer (8).

8. The special steel plate surface flatness detection platform according to claim 2, characterized in that: The number of the secondary conveying rollers (61) is several groups, the reinforcing rollers (62) are located in the middle position between two adjacent groups of secondary conveying rollers (61) near the upper end, and the top end of the reinforcing rollers (62) is flush with the top end of the secondary conveying rollers (61), the secondary servo motor (64) is used to drive the secondary conveying rollers (61) to rotate, the rotation speed of the secondary conveying rollers (61) is the same as the conveying speed of the main rollers (2), and the conveying directions of the two are the same, and the top end and inner side of the secondary conveying belt (63) are flush with the top end and inner side of the main conveying belt (3).

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