Corrugated paper thickness detection device

Abstract

The invention relates to the technical field of corrugated paper detection, in particular to a corrugated paper thickness detection device, which comprises a placement frame; a feeding structure for continuously feeding corrugated paper is mounted on the placing frame; the feeding structure comprises a feeding table fixed to the containing frame, an adjusting groove is formed in the bottom wall of the feeding table, limiting frames are movably arranged on the two sides of the interior of the adjusting groove correspondingly, a two-way screw is arranged on the inner sides of the limiting frames in a spiral transmission mode, and a first two-way motor is installed in the middle of the two-way screw. The corrugated paper feeding device has the precise feeding function, precise adjustment of the height and position of the pushing frame is achieved by precisely controlling cooperative operation of the first air cylinder and the first servo motor, it is ensured that corrugated paper is stably and accurately transferred to the first detection structure in the feeding process, paper deviation and damage are avoided, and the feeding efficiency and quality are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of corrugated paper detection, and particularly relates to a corrugated paper thickness detection device. Background Art

[0002] Corrugated board is a kind of board composed of a corrugated core layer and a covering layer formed between two or more layers of cardboard. When corrugated board is produced, according to different production requirements, the composed board needs to be made into a corresponding thickness to meet the usage standards of different users. When detecting the thickness of corrugated board, it is mainly divided into sampling detection and on-line production detection; the prior art patent CN215766911U discloses a thickness detection device on a corrugated board production line, including a conveyor belt and a frame. A measuring frame is arranged on the frame, and a number of measuring mechanisms are arranged on the measuring frame. The measuring mechanisms are suspended above the conveyor belt. The measuring mechanism includes a roller, a pulley, a connecting rope and a heavy object. The pulley is fixed on the measuring frame, the connecting rope bypasses the pulley, the connecting rope connects the roller and the heavy object. A fixing frame is further arranged on the frame, and the fixing frame is slidably connected with the roller, and the sliding direction is the vertical direction. A light emitter is arranged on the heavy object, the light emitter is horizontally placed, a support frame is arranged on the frame, and a light receiver is arranged on the support frame. This thickness detection device on the corrugated board production line is installed above the production line of the corrugated paper machine, and can measure the thickness of the corrugated board on the basis of not changing the old equipment. When in use, it performs laser thickness detection through the light emitter and the light receiver. The Chinese patent discloses a corrugated paper thickness detection device (publication number CN118565359 B), and this patented technology discloses a corrugated paper thickness detection device, including a cardboard moving table, a detection component and a diversion and protection component. A detection beam frame is horizontally arranged at the upper end of the cardboard moving table, and a reference support table is horizontally arranged below the cardboard moving table and below the detection beam frame. The thickness measurement module is installed below the moving installation table through the first installation component. According to the position of the cardboard to be detected, the thickness measurement module can be moved to a suitable position. Then, when detecting, in cooperation with the diversion and protection component, air flow can be pressed down on the cardboard to be detected below, so that the cardboard is smoothly attached to the reference support table, avoiding the problem of inaccurate detection caused by the bottom of the cardboard being suspended. Moreover, when the air flow presses, the heat generated by the work of the thickness measurement module can be processed, reducing the influence of the heat of the work of the thickness measurement module. And the cleaning component can clean the light-transmitting lens of the thickness measurement module, with simple operation and convenient use. This patented technology solves the problems that the laser thickness gauge is prone to generate heat during use, which in turn affects the measurement accuracy, and when the cardboard is conveyed to the detection position through the conveyor belt, the bottom is prone to be suspended, affecting the measurement quality and being inconvenient to use.

[0003] However, in the prior art, the corrugated paper to be detected usually needs to be manually loaded one by one, and it is necessary to solve the problem that the corrugated paper can be automatically loaded one by one when detecting the thickness of the corrugated paper in the prior art.

[0004] Therefore, those skilled in the art have provided a corrugated paper thickness detection device to solve the problems raised in the above background art. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides:

[0006] A corrugated paper thickness detection device, comprising:

[0007] A placement rack; a feeding structure for continuously feeding corrugated paper is installed on the placement rack;

[0008] The feeding structure includes a feeding table fixed on the placement rack, and an adjustment groove is formed in the bottom wall of the feeding table. Restricting frames are movably arranged on both sides inside the adjustment groove, and a bidirectional screw is helically driven inside the restricting frames. A bidirectional motor I is installed in the middle of the bidirectional screw;

[0009] A limiting plate that slides on the surface of the feeding table is fixedly provided at the top of the restricting frame;

[0010] On one side of the feeding structure, a detection structure I and a detection structure II for detecting during the transportation of corrugated paper are provided. The structures of the detection structure I and the detection structure II are the same, and a support frame I that supports on the ground is fixedly installed at one end of the detection structure II;

[0011] A flipping structure for horizontally flipping the corrugated paper is assembled between the detection structure I and the detection structure II.

[0012] Preferably: The surface of the feeding table is integrally fixed with a rear side plate, a thickness adjustment groove is formed in the middle of the rear side plate, a lifting frame slides inside the thickness adjustment groove, and a pushing frame slides inside the lifting frame. A screw body is fixed inside the pushing frame;

[0013] A worm gear is helically driven on the outer side of the screw body, and a helical drive relationship exists between the worm gear and the screw body;

[0014] The worm gear meshes with a worm that is rotatably installed inside the lifting frame. One end of the worm is connected to a servo motor I that is fixedly installed inside the lifting frame.

[0015] Preferably: A cylinder I is installed on the surface of the lifting frame, and the top end of the cylinder I is fixedly installed on the outer wall of the rear side plate;

[0016] The feeding structure includes a front side frame fixedly installed on the surface of the feeding table. A height limiting plate is movably arranged inside the front side frame, and a plurality of cylinders II fixedly installed on the front side frame are installed on the top of the height limiting plate.

[0017] Preferably, the first detection structure includes a conveying rack fixed to the side wall of the loading table. One end of the inner wall of the conveying rack is rotatably installed with a driving roller, and a transmission belt is sleeved outside the driving roller. One end of the inner side of the transmission belt away from the driving roller is rotatably provided with a driven roller, and a frame body supported on the ground is fixed outside the driven roller. One end of the driving roller rotatably penetrates through the outer wall of the conveying rack and is connected with a second servo motor.

[0018] Preferably, a groove body is formed in the inner wall of the conveying rack, and a sliding rack is movably arranged inside the groove body. Roller rods are rotatably arranged inside both ends of the sliding rack, and a moving belt is sleeved outside the roller rods.

[0019] Preferably, a screw rack rod is fixed in the middle of the sliding rack, and a bidirectional lead screw is in screw transmission with the inner side of the bottom end of the screw rack rod. A second bidirectional motor is installed in the middle of the bidirectional lead screw, and a chute rack fixed to the bottom wall of the conveying rack is arranged outside the screw rack rod.

[0020] Preferably, the screw rack rod is slidably arranged inside the chute rack, and the second bidirectional motor is fixedly installed inside the chute rack.

[0021] Preferably, the first detection structure further includes a detection rack fixedly installed on the surface of the conveying rack. A laser thickness detector for measuring the thickness of the moving corrugated paper by laser sensing is assembled at one end of the detection rack.

[0022] Preferably, a lifting frame is movably arranged inside the detection rack. A plurality of third cylinders fixed to the inner side wall of the detection rack are assembled at the top end of the lifting frame. Parallel flatness sliders are movably arranged inside the lifting frame. Springs are assembled at the top ends of a plurality of the flatness sliders, and pressure sensors arranged inside the lifting frame are assembled at the top of the springs.

[0023] Preferably, the flipping structure includes a transmission roller rotatably installed in the inner walls of the conveying racks of the first detection structure and the second detection structure. One end of the transmission roller is connected with a third servo motor, and flipping frames for flipping the corrugated paper are fixedly assembled on the outer wall of the transmission roller at equal intervals in a ring shape.

[0024] A controller for overall control of the device is installed on the outer wall of the placement rack.

[0025] The technical effects and advantages of the present invention:

[0026] The present invention has high adaptability: it can flexibly adjust the placement space of the loading structure according to the specifications of the corrugated paper, and can be accurately adjusted in both the width and thickness directions, effectively adapting to the diverse production requirements of corrugated paper, reducing the inconvenience of loading and detection errors caused by size differences, and improving the versatility of the equipment.

[0027] The present invention has an accurate feeding function: by precisely controlling the coordinated operation of cylinder 1 and servo motor 1, precise adjustment of the height and position of the pushing frame is achieved, ensuring that the corrugated paper is smoothly and accurately transferred to the first detection structure during feeding, avoiding paper deviation and damage, and improving the feeding efficiency and quality.

[0028] The present invention has a comprehensive detection function: the first detection structure integrates a laser thickness detector and a flatness detection mechanism based on a spring pressure sensor, which can accurately measure the thickness and surface flatness of the corrugated paper, and can use the bidirectional motor 2 to adjust the limit in real time during the detection process to ensure the detection accuracy and stability, providing a reliable basis for product quality control.

[0029] The present invention has an efficient flipping and detecting function: the flipping structure drives the transmission roller with the servo motor 3 to quickly and stably flip the corrugated paper, enabling its back side to smoothly enter the second detection structure for secondary detection, realizing comprehensive double-sided detection of the corrugated paper, effectively preventing defect omission, and ensuring product quality consistency. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of a corrugated paper thickness detection device provided by the present application;

[0031] Figure 2 is a schematic top view structural diagram of a corrugated paper thickness detection device provided by the present application;

[0032] Figure 3 is a schematic front view structural diagram of a corrugated paper thickness detection device provided by the present application;

[0033] Figure 4 is a schematic disassembled structural diagram of a corrugated paper thickness detection device provided by the present application;

[0034] Figure 5 is a schematic structural diagram of the rear side plate of a corrugated paper thickness detection device provided by the present application;

[0035] Figure 6 is a schematic structural diagram of the limit plate of a corrugated paper thickness detection device provided by the present application;

[0036] Figure 7 is a schematic structural diagram of the pushing frame of a corrugated paper thickness detection device provided by the present application;

[0037] Figure 8 is a schematic structural diagram of the front side frame of a corrugated paper thickness detection device provided by the present application;

[0038] Figure 9 is a schematic structural diagram of the first detection structure of a corrugated paper thickness detection device provided by the present application;

[0039] Figure 10 It is a schematic structural diagram of a sliding frame in a corrugated paper thickness detection device provided by the present application;

[0040] Figure 11 It is a schematic structural diagram of a detection frame in a corrugated paper thickness detection device provided by the present application;

[0041] Figure 12 It is a schematic structural diagram of a flipping structure in a corrugated paper thickness detection device provided by the present application.

[0042] In the figure:

[0043] 1. Placing frame;

[0044] 2. Loading structure; 201. Loading table; 202. Adjusting groove; 203. Restricting frame; 204. Limiting plate; 205. Bidirectional screw; 206. Bidirectional motor I; 207. Rear side plate; 208. Thickness adjusting groove; 209. Lifting frame; 210. Cylinder I; 211. Pushing frame; 212. Screw body; 213. Worm gear; 214. Worm; 215. Servo motor I; 216. Front side frame; 217. Height limiting plate; 218. Cylinder II;

[0045] 3. Detection structure I; 301. Conveying frame; 302. Driving roller; 303. Transmission belt; 304. Servo motor II; 305. Sliding groove frame; 306. Screw frame rod; 307. Sliding frame; 308. Bidirectional lead screw; 309. Bidirectional motor II; 310. Moving belt; 311. Detection frame; 312. Laser thickness detector; 313. Lifting frame; 314. Cylinder III; 315. Flatness slider; 316. Spring; 317. Pressure sensor;

[0046] 4. Flipping structure; 401. Transmission roller; 402. Flipping frame; 403. Servo motor III;

[0047] 5. Detection structure II; 6. Support frame; 7. Controller. Detailed implementation manners

[0048] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners. The examples of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

[0049] Embodiment, please refer to Figures 1 to 6, in this embodiment, a corrugated paper thickness detection device is provided, including a placement rack 1; a feeding structure 2 for continuously feeding corrugated paper is installed on the placement rack 1; the feeding structure 2 includes a feeding table 201 fixed on the placement rack 1, and an adjustment groove 202 is opened on the bottom wall of the feeding table 201. Restriction frames 203 are movably arranged on both sides inside the adjustment groove 202. A bidirectional screw 205 is helically driven inside the inner sides of the restriction frames 203, and a bidirectional motor 1 206 is installed in the middle of the bidirectional screw 205; a limiting plate 204 that slides on the surface of the feeding table 201 is fixedly arranged on the top of the restriction frame 203; on one side of the feeding structure 2, a detection structure 1 3 and a detection structure 2 5 for detecting during the transportation of corrugated paper are provided. The structures of the detection structure 1 3 and the detection structure 2 5 are the same, and a support frame 6 supported on the ground is fixedly installed at one end of the detection structure 2 5; a flipping structure 4 for horizontally flipping the corrugated paper is assembled between the detection structure 1 3 and the detection structure 2 5.

[0050] The entire surface of the feeding table 201 is fixedly provided with a rear side plate 207. A thickness adjustment groove 208 is opened in the middle of the rear side plate 207. A lifting frame 209 is slidably arranged inside the thickness adjustment groove 208. A pushing frame 211 is slidably arranged inside the lifting frame 209. A screw body 212 is fixed inside the pushing frame 211; a worm gear 213 is helically driven on the outer side of the screw body 212. The worm gear 213 and the screw body 212 are in a helical drive relationship; the worm gear 213 meshes with a worm 214 rotatably installed inside the lifting frame 209. One end of the worm 214 is connected to a servo motor 1 215 fixedly installed inside the lifting frame 209.

[0051] A cylinder 1 210 is installed on the surface of the lifting frame 209, and the top end of the cylinder 1 210 is fixedly installed on the outer wall of the rear side plate 207; the feeding structure 2 includes a front side frame 216 fixedly installed on the surface of the feeding table 201. A height limiting plate 217 is movably arranged inside the front side frame 216. A plurality of cylinders 2 218 fixedly installed on the front side frame 216 are installed on the top of the height limiting plate 217. The detection structure 1 3 includes a conveying frame 301 fixed on the side wall of the feeding table 201. A driving roller 302 is rotatably installed on the inner wall at one end of the conveying frame 301. A transmission belt 303 is sleeved outside the driving roller 302. A driven roller is rotatably arranged on the inner side of the transmission belt 303 away from the driving roller 302. A frame body supported on the ground is fixed outside the driven roller. One end of the driving roller 302 rotatably penetrates through the outer wall of the conveying frame 301 and is connected to a servo motor 2 304.

[0052] The inner wall of the conveying frame 301 is provided with a groove, and a sliding frame 307 is movably arranged inside the groove. Roller rods are rotatably arranged on the inner sides of both ends of the sliding frame 307, and a moving belt 310 is sleeved on the outer sides of the roller rods. A screw frame rod 306 is fixedly arranged in the middle of the sliding frame 307, and a bidirectional lead screw 308 is in screw drive with the inner side of the bottom end of the screw frame rod 306. A bidirectional motor two 309 is installed in the middle of the bidirectional lead screw 308. A chute frame 305 fixedly installed on the bottom wall of the conveying frame 301 is arranged outside the screw frame rod 306. The screw frame rod 306 is slidably arranged inside the chute frame 305, and the bidirectional motor two 309 is fixedly installed inside the chute frame 305.

[0053] The first detection structure 3 further includes a detection frame 311 fixedly installed on the surface of the conveying frame 301. A laser thickness detector 312 for measuring the thickness of the moving corrugated paper by laser sensing is assembled at one end of the detection frame 311. A lifting frame 313 is movably arranged inside the detection frame 311. A plurality of cylinder threes 314 fixed on the inner side wall of the detection frame 311 are assembled at the top end of the lifting frame 313. Parallel flatness sliders 315 are movably arranged inside the lifting frame 313. Springs 316 are assembled at the top ends of the plurality of flatness sliders 315, and a pressure sensor 317 arranged inside the lifting frame 313 is assembled at the top of the springs 316. The flipping structure 4 includes a transmission roller 401 rotatably installed on the inner wall of the conveying frame 301 in the first detection structure 3 and the second detection structure 5. A servo motor three 403 is connected to one end of the transmission roller 401. Flipping frames 402 for flipping the corrugated paper are fixedly assembled at equal intervals in a ring shape on the outer wall of the transmission roller 401. A controller 7 for overall control of the device is installed on the outer wall of the placing frame 1.

[0054] According to the above embodiments, the working principle of the present invention is as follows:

[0055] The placing space of the feeding structure 2 can be adjusted according to the size of the corrugated paper to be fed and detected as required;

[0056] When adjusting the front-back width in the feeding structure 2, after starting the bidirectional motor one 206, the bidirectional motor one 206 drives the bidirectional screw rod 205 to rotate after starting. The rotation of the bidirectional screw rod 205 can perform screw drive on the limiting frame 203, so that the limiting frame 203 drives the limiting plate 204 to adjust the position on the feeding table 201;

[0057] When adjusting the thickness specification of the corrugated paper, the height of the lifting frame 209 can be adjusted according to the thickness of a single corrugated paper. Start the cylinder one 210, and after the cylinder one 210 starts, adjust the height of the lifting frame 209 from the feeding table 201;

[0058] When pushing and loading the corrugated paper placed on the loading table 201, adjust the height of the pushing frame 211 according to the thickness position of the corrugated paper. Start the first cylinder 210, and the first cylinder 210 can drive the lifting frame 209 to adjust its height inside the thick adjustment groove 208. When pushing the corrugated paper, start the first servo motor 215. The first servo motor 215 drives the worm 214 to rotate. The worm 214 meshes with the worm gear 213 to rotate, enabling the worm gear 213 to perform a spiral drive on the screw body 212. When the screw body 212 moves along the worm gear 213, it can drive the pushing frame 211 to move inside the lifting frame 209, and push the corrugated paper to the first detection structure 3;

[0059] After starting the second servo motor 304 of the first detection structure 3, the second servo motor 304 starts to drive the driving roller 302 to rotate. Rotating the driving roller 302 can move the conveyor belt 303, and then drive the corrugated paper thereon to move to the inside of the detection frame 311 and pass through the laser thickness detector 312 for thickness detection. The corrugated paper after thickness detection moves to the bottom of the flatness slider 315. When the flatness slider 315 contacts the corrugated paper, the flatness slider 315 will be under pressure when encountering the corrugated paper and compress the spring 316. The compressed spring 316 exerts a force on the pressure sensor 317. Through the pressure detection of the pressure sensor 317, the flatness of the surface of the corrugated paper can be detected;

[0060] When the first detection structure 3 moves the corrugated paper, limit adjustment can be performed. After starting the second bidirectional motor 309, the second bidirectional motor 309 starts to drive the bidirectional screw rod 308. The rotating bidirectional screw rod 308 can perform a spiral drive on the screw frame rod 306, enabling the screw frame rod 306 to move inside the chute frame 305, and then move the sliding frame 307 towards the corrugated paper direction, so that the moving belt 310 contacts and limits the corrugated paper;

[0061] The flatness slider 315 can be adjusted in height after the thickness of the corrugated paper is detected. After starting the third cylinder 314, the lifting of the third cylinder 314, through the lifting frame 313, adjusts the height of the flatness slider 315, and thus the height can be adjusted;

[0062] After the corrugated paper after flatness detection moves to the inside of the flipping frame 402 of the flipping structure 4, start the third servo motor 403. After the third servo motor 403 starts, it rotates the transmission roller 401. Through the rotating transmission roller 401, the corrugated paper inside the flipping frame 402 can be driven to rotate, and the corrugated paper is flipped and conveyed to the second detection structure 5 for thickness and flatness detection of the back surface of the corrugated paper.

[0063] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art and related fields based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention shall be implemented by conventional means in the art unless otherwise specified and limited.

Claims

1. A corrugated paper thickness detection device, characterized in that: include: A placing rack (1); a feeding structure (2) for continuously feeding corrugated paper is installed on the placing rack (1); The feeding structure (2) comprises a feeding platform (201) fixed on the placement frame (1), and the bottom wall of the feeding platform (201) is provided with an adjustment groove (202), and limiting frames (203) are movably arranged on both sides of the adjusting groove (202), and a bidirectional screw (205) is spirally driven inside the limiting frame (203), and a bidirectional motor (206) is installed in the middle of the bidirectional screw (205); A limiting plate (204) is fixedly provided on the top of the limiting frame (203) and is slidably located on the surface of the loading platform (201); A detection structure 1 (3) and a detection structure 2 (5) for detecting the corrugated paper during transportation are provided on one side of the feeding structure (2); the detection structure 1 (3) and the detection structure 2 (5) have the same structure, and a support frame (6) supported on the ground is fixedly installed at one end of the detection structure 2 (5); A flipping structure (4) for flipping the corrugated paper horizontally is installed between the detection structure 1 (3) and the detection structure 2 (5).

2. A corrugated paper thickness detection device according to claim 1, characterized in that: A rear side plate (207) is fixed to the entire surface of the loading platform (201), a thickness adjustment groove (208) is provided in the middle of the rear side plate (207), a lifting frame (209) is slidably provided inside the thickness adjustment groove (208), a push frame (211) is slidably provided inside the lifting frame (209), and a screw body (212) is fixed inside the push frame (211); A worm wheel (213) is provided on the outer side of the screw body (212) for spiral transmission, and a spiral transmission relationship is formed between the worm wheel (213) and the screw body (212); The worm wheel (213) is meshed with a worm (214) rotatably mounted on the inner side of the lifting frame (209), and one end of the worm (214) is connected to a servo motor (215) fixedly mounted on the inner side of the lifting frame (209).

3. A corrugated paper thickness detection device according to claim 2, characterized in that: A cylinder 1 (210) is installed on the surface of the lifting frame (209), and the top end of the cylinder 1 (210) is fixedly installed on the outer wall of the rear side plate (207); The loading structure (2) comprises a front side frame (216) fixedly mounted on the surface of the loading platform (201), a height limiting plate (217) movably arranged inside the front side frame (216), and a plurality of cylinders (218) fixedly mounted on the front side frame (216) are mounted on the top of the height limiting plate (217).

4. A corrugated paper thickness detection device according to claim 2, characterized in that: The detection structure one (3) includes a conveying frame (301) fixed on the side wall of the loading platform (201), a transmission roller (302) is rotatably installed on the inner wall of one end of the conveying frame (301), and a transmission belt (303) is sleeved on the outside of the transmission roller (302), a driven roller is rotatably arranged on the inner side of one end of the transmission belt (303) away from the transmission roller (302), and a frame body supported on the ground is fixed on the outside of the driven roller, and one end of the transmission roller (302) is rotatably penetrated through the outer wall of the conveying frame (301) and is connected to a servo motor two (304).

5. A corrugated paper thickness detection device according to claim 4, characterized in that: The inner wall of the conveying frame (301) is provided with a groove body, and a sliding frame (307) is movably arranged inside the groove body. Roller rods are rotatably arranged inside both ends of the sliding frame (307), and a moving belt (310) is sleeved on the outer side of the roller rod.

6. A corrugated paper thickness detection device according to claim 5, characterized in that: A screw rod (306) is fixedly provided in the middle of the sliding frame (307), and a bidirectional screw rod (308) is spirally driven on the inner side of the bottom end of the screw rod (306), a bidirectional motor 2 (309) is installed in the middle of the bidirectional screw rod (308), and a slide groove frame (305) is fixedly installed on the bottom wall of the conveying frame (301) on the outer side of the screw rod (306).

7. A corrugated paper thickness detection device according to claim 6, characterized in that: The screw rod (306) is slidably arranged on the inner side of the slide slot frame (305), and the bidirectional motor 2 (309) is fixedly installed on the inner side of the slide slot frame (305).

8. A corrugated paper thickness detection device according to claim 4, characterized in that: The detection structure 1 (3) also includes a detection frame (311) fixedly mounted on the surface of the conveying frame (301), and one end of the detection frame (311) is equipped with a laser thickness detector (312) for measuring the laser sensing thickness of the moving corrugated paper.

9. A corrugated paper thickness detection device according to claim 8, characterized in that: A lifting frame (313) is movably arranged inside the detection frame (311), and a plurality of cylinders (314) fixed to the inner wall of the detection frame (311) are mounted on the top of the lifting frame (313). Flatness sliders (315) arranged in parallel are movably arranged inside the lifting frame (313), and a plurality of springs (316) are mounted on the tops of the plurality of flatness sliders (315), and a pressure sensor (317) arranged inside the lifting frame (313) is mounted on the top of the spring (316).

10. A corrugated paper thickness detection device according to claim 4, characterized in that: The turning structure (4) comprises a transmission roller (401) rotatably mounted on the inner wall of a conveying frame (301) in the detection structure 1 (3) and the detection structure 2 (5); one end of the transmission roller (401) is connected to a servo motor 3 (403); and the outer wall of the transmission roller (401) is annularly and equidistantly fixed with a turning frame (402) for turning the corrugated paper.

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