Continuous multi-station intelligent detecting and screening device

Abstract

The invention provides a continuous multi-station intelligent detecting and screening device, belongs to the field of pipeline detection, and solves the problems that an existing detecting and screening device is low in detecting and sorting efficiency, unstable in conveying, single in detecting function and the like. Comprising a pipeline feeding mechanism, a machine box and four NG waste boxes which are located on the left side of the machine box and distributed at equal intervals from front to back, and the pipeline feeding mechanism extends into the machine box; an intermittent feeding mechanism, a receiving and conveying mechanism, four unloading slideway mechanisms which are distributed at equal intervals from front to back, and a length detection mechanism, a step detection mechanism, an eddy current detection mechanism and an air tightness detection mechanism which are sequentially arranged from front to back are arranged on the bottom side in the case; and the tail end of the unloading slideway mechanism extends out of the case and is positioned above the NG waste box at the corresponding position. According to the full-automatic pipeline sorting machine, seamless connection of feeding, length / step / vortex / airtight detection, sorting and material receiving work can be achieved, full-process automation of the pipeline from feeding to qualified product output is achieved, and all the mechanisms are independently controlled and cooperatively work.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipeline detection, and relates to an intelligent detection and screening device, in particular to a continuous multi-station intelligent detection and screening device. Background Art

[0002] As critical infrastructure, pipelines are widely used in numerous sectors, including petroleum, chemical engineering, water conservancy, and gas. Their operational safety and stability are directly impactful on both public life and industrial development. Pipeline connections must ensure consistent quality, including length, steps, eddy currents, and airtightness. Therefore, pipeline inspection and screening are essential to ensure secure connections and efficient operation.

[0003] Manual inspection and screening are inefficient: In the past, pipeline inspection mostly relied on manual inspection, which was not only inefficient and labor-intensive, but also prone to omissions.

[0004] Traditional equipment has insufficient performance: it can only detect a single function, has poor continuity and low efficiency.

[0005] Against this background, a continuous multi-station pipeline intelligent detection and screening device came into being. It can overcome the limitations of traditional methods, realize continuous, efficient and accurate detection and screening of materials in the pipeline, and improve the operation and management level of the pipeline system.

[0006] Based on this, we propose a continuous multi-station intelligent detection and screening device to achieve seamless connection of loading → length / step / eddy current / airtightness detection → sorting → material collection, and realize the automation of the entire process of pipeline from material input to qualified product output. At the same time, each mechanism is independently controlled and works collaboratively. Summary of the Invention

[0007] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a continuous multi-station intelligent detection and screening device. The technical problem to be solved by this invention is: how to achieve seamless connection of loading → length / step / eddy current / airtightness detection → sorting → material collection, and realize the full process automation of the pipeline from material input to qualified product output, while each mechanism is independently controlled and works collaboratively.

[0008] The purpose of the present invention can be achieved through the following technical solutions: A continuous multi-station intelligent detection and screening device comprises a pipe feeding mechanism and a chassis and four NG waste boxes equidistantly distributed from front to back on the left side of the chassis, the pipe feeding mechanism extends into the interior of the chassis, and the inner bottom side of the chassis is provided with an intermittent feeding mechanism, a material receiving and conveying mechanism, four unloading chute mechanisms equidistantly distributed from front to back, and a length detection mechanism, a step detection mechanism, an eddy current detection mechanism and an airtightness detection mechanism arranged in sequence from front to back, the material receiving and conveying mechanism is located on the rear side of the intermittent feeding mechanism, the intermittent feeding mechanism is located on the inner sides of the length detection mechanism, the step detection mechanism, the eddy current detection mechanism and the airtightness detection mechanism, the unloading chute mechanisms are respectively located on the left sides of the length detection mechanism, the step detection mechanism, the eddy current detection mechanism and the airtightness detection mechanism at corresponding positions, and the end of the unloading chute mechanism extends out of the chassis and is located above the NG waste box at the corresponding position.

[0009] The working principle of the present invention is as follows: a number of step pipes are placed inside the pipe feeding mechanism, and the pipe feeding mechanism continuously transports the step pipes to be inspected to the intermittent feeding mechanism inside the chassis; the intermittent feeding mechanism adopts step-by-step intermittent transportation, and sequentially sends the step pipes to the four inspection stations of the length detection mechanism, the step detection mechanism, the eddy current detection mechanism and the airtightness detection mechanism, and performs length detection → step detection → eddy current detection → airtightness detection in sequence; each inspection station is equipped with an independent unloading slide mechanism, and when a station detects that a step pipe has defects, the length detection mechanism, the step detection mechanism, the eddy current detection mechanism and the airtightness detection mechanism push the defective step pipe into the unloading slide mechanism and discharge it into the designated NG waste box; the qualified step pipes that pass all the inspections enter the material receiving and conveying mechanism for collection and output.

[0010] The left side of the chassis is provided with a feed port and four discharge ports equidistantly distributed from front to back, a four-color warning light is provided on the upper part of the chassis, and a control touch screen is provided on the chassis.

[0011] With the above structure, the feed port is used to cooperate with the pipeline feeding mechanism for feeding, and the discharge port is used to cooperate with the unloading slide mechanism to discharge defective step pipelines. The four-color warning light displays the equipment operation status such as green normal, red fault, yellow standby, and blue maintenance, which is convenient for operators to monitor. The control touch screen is used as a human-computer interaction interface for parameter setting, status monitoring and manual operation. The detection data is uploaded to the control touch screen to generate statistical charts.

[0012] The pipeline feeding mechanism includes a feeding box, a tilted discharge hopper is fixed on the front side of the upper end of the feeding box, a lifting discharge rack is slidably provided in the middle part of the upper end of the feeding box, a lifting push rod is fixed on the rear side of the lower end of the feeding box, the telescopic end of the lifting push rod is fixedly connected to the lifting discharge rack, an output crawler is provided on the rear side of the upper end of the feeding box, an output motor is fixed on the left side of the feeding box, the output shaft of the output motor is fixedly connected to one of the rotating shafts of the output crawler, a detection sensor is provided on the bracket of the output crawler, and the output end of the output crawler extends into the inside of the feed port.

[0013] Using the above structure, several step pipes are placed inside the discharge hopper. The inclined design of the discharge hopper ensures that the step pipes slide naturally to the lifting and discharging rack area; the lifting push rod drives the lifting and discharging rack to lift and lower at a low speed, lifting the step pipes to the same height as the output crawler in turn, and rolling them onto the output crawler; the output shaft of the output motor drives the output crawler to work, and transports the step pipes in a single row from the feed port to the intermittent feeding mechanism inside the chassis; after the detection sensor (such as a photoelectric or pressure sensor) confirms that the step pipe is in place, the output crawler stops conveying; the surface of the output crawler can be designed with anti-slip grooves or V-grooves to ensure that the step pipe enters the interior of the chassis axially stably; when the detection sensor detects that there is no step pipe, the output crawler continues to transport the next step pipe.

[0014] The intermittent feeding mechanism includes a feeding base and a feeding rack. The feeding base is arranged on the inner bottom side of the chassis. The upper end of the feeding base is fixed with a feeding motor and a work station frame. The feeding motor is located on the lower side of the work station frame. The upper end of the feeding base is rotatably provided with two rotation shafts. A linkage pulley pair is provided between the two rotation shafts and between the output shaft of the feeding motor and one of the rotation shafts. A rotation connecting rod is fixed at both ends of the rotation shaft. The feeding rack is located on the inner side of the work station frame. Vertical connecting rods are fixed at the four corners of the lower end of the feeding rack. The vertical connecting rods are rotatably connected with the rotation connecting rods below them. A discharge plate is provided on the rear side of the work station frame. A number of pipe grooves are provided on the upper ends of the feeding base and the feeding rack.

[0015] With the above structure, the step pipe is pushed into the pipe slot at the front end of the upper end of the feeding chassis, the feeding motor is started, and the output shaft of the feeding motor drives the two rotation shafts to rotate synchronously through the linkage pulley pair; the rotation shaft drives the rotation connecting rods at both ends to make circular motion, thereby pushing the vertical connecting rod and the feeding rack to perform a compound motion (lifting + horizontal swing); when the rotation connecting rod moves to the upper semicircle, the feeding rack is lifted and moved horizontally backward, and the pipe slot of the feeding rack lifts the step pipe from the pipe slot at the front end of the feeding chassis. When the rotation connecting rod moves to the lower semicircle, the feeding rack descends and resets backward, and is placed in the next pipe slot of the feeding chassis in turn, and then placed in the next pipe slot of the feeding chassis by the next pipe slot of the feeding rack; after the inspection is completed, the step pipe is pushed to the discharge plate and enters the next link. Qualified products enter the receiving and conveying mechanism, and unqualified products are pushed into the unloading slide mechanism.

[0016] The length detection mechanism includes a base frame and a pushing assembly, which are both arranged on the inner bottom side of the chassis, and the base frame and the pushing assembly are respectively located on the left and right sides of the feeding base frame, and a rotary motor and a mounting seat are fixed to the upper end of the base frame, and a rotary mounting plate is provided on the left side of the mounting seat, and the output shaft of the rotary motor is fixedly connected to the rotating shaft of the mounting seat, and a length detection sensor is fixed to the upper end of the rotary mounting plate, which is facing the pushing assembly at the initial position, and an air purge module is provided on the rotary mounting plate.

[0017] When the material detection sensor is unloaded, the pusher assembly pushes the step pipe to the length detection position, and the pusher assembly is in the standby position; the rotary mounting plate is reset to the initial angle under the drive of the rotary motor, so that the length detection sensor faces the pusher assembly, and the pusher assembly pushes the step pipe to contact the length detection sensor, and the two cooperate to perform length detection. If the detection is qualified, the pusher assembly is reset. If the detection is unqualified, the output shaft of the rotary motor drives the length detection sensor to reset to the initial position and prepares for the next detection. If the detection is unqualified, the rotary mounting plate is rotated 90 degrees, which drives the length detection sensor to no longer face the pusher assembly. The pusher assembly pushes the step pipe out of the intermittent feeding mechanism and discharges defective products from the corresponding unloading slide mechanism; then the rotary mounting plate is reset to the initial angle under the drive of the rotary motor, so that the length detection sensor faces the pusher assembly, and the pusher assembly is retracted and reset to prepare for the next detection; the air purge module blows air to clean the step pipe.

[0018] The eddy current detection mechanism includes a positioning cylinder, a pushing assembly and four follower rollers, the positioning cylinder and the pushing assembly are all arranged on the inner bottom side of the chassis, the intermittent feeding mechanism passes through the bottom of the positioning cylinder, the pushing assembly is located on the right side of the feeding base frame, a connecting plate is fixed on the slide of the positioning cylinder, an eddy current detection head is detachably provided on the connecting plate, the eddy current detection head is directly opposite to the pushing assembly there, a vertically arranged lifting push rod 1 is fixed on the bracket of the positioning cylinder, the telescopic end of the lifting push rod 1 is fixed with a base plate, two lifting guide shafts are fixed on the upper end of the base plate, the two lifting guide shafts are located on the left and right sides of the lifting push rod 1, and the two lifting guide shafts are slidably arranged on the bracket of the positioning cylinder, a roller motor is fixed at the lower end of the base plate, a friction roller is fixed on the output shaft of the roller motor, four follower rollers are grouped in pairs, the two groups of follower rollers are symmetrically arranged, and the two follower rollers in each group are rotatably arranged on both sides of the work station frame.

[0019] Using the above structure, the intermittent feeding mechanism transports the stepped pipe to the eddy current testing station. At this time, the stepped pipe is located on four follower rollers, and the pusher assembly is in the standby position. When the lifting push rod descends, it drives the friction roller to press the stepped pipe tightly. At the same time, the adjustment cylinder fine-tunes the position of the eddy current testing head so that it is sleeved on the step of the stepped pipe. The roller motor starts, and the roller motor's output shaft drives the friction roller to rotate, driving the stepped pipe to rotate at a uniform speed around its own axis on the four follower rollers. The eddy current testing head continuously emits a high-frequency electromagnetic field during the rotation of the stepped pipe to detect surface and near-surface defects. When cracks or material unevenness are encountered, the eddy current field is distorted and the sensor output signal fluctuates. The data is transmitted to the control system in real time to generate a defect waveform diagram. After the test is completed, the lifting push rod rises, driving the roller motor to reset. If the test is qualified, the intermittent feeding mechanism transports the stepped pipe to the next station (airtightness testing mechanism). If the test fails, the pusher assembly pushes the stepped pipe out of the intermittent feeding mechanism, and the defective product is discharged from the corresponding unloading chute mechanism. After being pushed out, the pusher assembly retracts and resets, preparing for the next test.

[0020] The step detection mechanism includes a lifting wire rod, a pushing assembly and a Yuanxin light source. The lifting wire rod and the pushing assembly are respectively located on the left and right sides of the feeding base frame. The lifting wire rod is fixed to the front side of the bracket of the positioning cylinder. A mounting frame is fixed on the slide of the lifting wire rod. A visual system is provided on the mounting frame. The Yuanxin light source is fixed on the left side of the work station frame. The visual system is located directly above the Yuanxin light source. The pushing assembly there is directly between the Yuanxin light source and the visual system.

[0021] Using the above structure, the intermittent feeding mechanism transports the step pipe to the step inspection station. The step of the step pipe is located between the telecentric light source and the vision system. The telecentric light source emits parallel light to evenly illuminate the end face of the step pipe, eliminate edge optical distortion, and ensure clear imaging. The lifting wire rod drives the mounting frame (equipped with the vision system) to move up and down, and the vision system automatically focuses and determines the optimal focal length through laser ranging or image clarity algorithm; after positioning is completed, the height is locked to ensure detection consistency, and the vision system takes a high-definition image of the end face of the step pipe (resolution is usually ≥5 million pixels); the image processing algorithm detects the following features: step height (calculated by shadow contrast), chamfer angle (edge contour fitting), burrs / defects (morphological analysis); if the inspection is qualified, the intermittent feeding mechanism transports the step pipe to the next station (eddy current detection mechanism); if the inspection fails, the pusher assembly pushes the step pipe out of the intermittent feeding mechanism and discharges the defective product from the corresponding unloading slide mechanism. After pushing it out, the pusher assembly retracts and resets to prepare for the next inspection.

[0022] The pushing assembly includes a vertical frame, which is fixed to the inner bottom side of the chassis, a fixed seat is fixed to the upper end of the vertical frame, a horizontally arranged pushing rod is fixed on the fixed seat, a pushing plate is fixed to the telescopic end of the pushing rod, two pushing guide shafts are fixed to the right side of the pushing plate, the two pushing guide shafts are located on the front and rear sides of the pushing rod, and the two pushing guide shafts are slidably set on the fixed seat, and the pushing plates of the three pushing assemblies are respectively opposite to the length detection sensors and eddy current detection heads and the far-new light source and visual system at corresponding positions.

[0023] With the above structure, the pushing assembly serves as a multi-station collaborative positioning mechanism, and assumes the following core functions in the detection process: Detection coordination: forming a linkage with length, eddy current, and step detection to ensure the consistency of detection posture; Anti-interference avoidance: completely exit the detection area during non-working hours to avoid affecting the operation of other mechanisms; in standby state, the pushing rod is in a retracted state, and the pushing plate is retreated to the right side of the intermittent feeding mechanism, and is stabilized by the two pushing guide shafts. When the step pipe enters the station and needs to be pushed, the pushing rod is extended, and the stroke is adjustable according to the pipe length, and the pushing plate pushes the step pipe to the right; after the detection is completed, the pushing rod immediately retracts, and the pushing guide shaft guides the pushing plate to accurately reset, making way for the next step pipe to be transported.

[0024] The airtightness detection mechanism includes a base frame 2 and a vertical frame 2, and the base frame 2 and the vertical frame 2 are both fixed on the inner bottom side of the chassis, and the base frame 2 and the vertical frame 2 are respectively located on the left and right sides of the feeding base frame, and a lifting push rod 2 and a slide rail are fixed on the left side of the vertical frame 2, and a fixed seat 2 is slidingly provided on the slide rail, and the fixed seat 2 is fixed to the upper end of the telescopic end of the lifting push rod 2, and a pushing push rod 2 is fixed on the fixed seat 2, and a pushing plate 2 is fixed at the telescopic end of the pushing push rod 2, and two pushing guide shafts 2 are fixed on the right side of the pushing plate 2, and the two pushing guide shafts 2 are located on the front and rear sides of the pushing push rod 2, and the two pushing guide shafts 2 are slidably set on the fixed seat 2, and the upper end of the pushing plate 2 is fixed with a guide seat A horizontally arranged mobile cylinder is fixed on the guide seat, and a mobile seat is fixed to the telescopic end of the mobile cylinder. Four mobile guide shafts are fixed on the right side of the mobile seat. The four mobile guide shafts are slidably arranged on the guide seat. A WEH joint is fixed on the left side of the mobile seat. The right end of the WEH joint is connected to a quick-release air guide joint, and the quick-release air guide joint is connected to an external air pump. A rotary motor 2 and a mounting seat 2 are fixed on the upper end of the base frame 2. A rotary mounting plate 2 is provided on the left side of the mounting seat 2. The output shaft of the rotary motor 2 is fixedly connected to the rotating shaft of the mounting seat 2. A sealing plug is fixed to the upper end of the rotary mounting plate 2, and the sealing plug is facing the WEH joint when it is in the initial position.

[0025] With the above structure, the intermittent feeding mechanism transports the step pipe to the airtightness detection station, and the lifting push rod 2 drives the fixed seat 2 to slide up and down on the slide rail, so that the WEH joint is facing the step pipe, and the rotary mounting plate 2 is reset to the initial angle under the drive of the rotary motor 2, so that the sealing plug is facing the WEH joint. In the standby state, the moving cylinder is in a retracted state, and the sealing plug is retreated to the right side of the intermittent feeding mechanism, and is stabilized and limited by the four moving guide shafts; the moving cylinder pushes the moving seat to move to the left, and the four moving guide shafts slide on the guide seat to ensure that the moving seat moves stably. The WEH joint presses the right end of the step pipe, and the left end of the step pipe presses the sealing plug to form a double-end seal. The external air pump injects air into the quick-release air guide joint, and injects air into the inside of the step pipe through the WEH joint, maintains pressure for - seconds, and monitors the pressure decay rate; if the test is qualified, the moving cylinder pushes the moving seat to move to the right, pulls the WEH joint back to the right, and intermittent feeding is completed. The mechanism transports the step pipe to the material receiving and conveying mechanism; if the inspection fails, the output shaft of the rotary motor 2 drives the rotary mounting plate 1 to rotate 90 degrees, that is, the sealing plug is no longer facing the step pipe; the lifting push rod 2 drives the fixed seat 2 to slide up and down on the slide rail, so that the push plate 2 is facing the step pipe; the pushing push rod 2 is extended, and the stroke is adjustable according to the pipe length, and the push plate 2 pushes the step pipe to the right, and through the two pushing guide shafts 2, the step pipe is pushed out of the intermittent feeding mechanism, and the defective products are discharged from the corresponding unloading slide mechanism; after the inspection is completed, the pushing push rod 2 is immediately retracted, and the pushing guide shaft 2 guides the push plate to be accurately reset to make way for the next step pipe transportation. At the same time, the lifting push rod 2 drives the fixed seat 2 to slide up and down on the slide rail, so that the WEH joint is facing the step pipe, and the rotary mounting plate 2 is reset to the initial angle under the drive of the rotary motor 2, so that the sealing plug is facing the WEH joint, ready for the next inspection.

[0026] The unloading slide mechanism includes a unloading seat, which is fixed on the inner bottom side of the chassis, a lower adjusting seat is fixed on the upper end of the unloading seat, an upper adjusting seat is hinged on the upper end of the lower adjusting seat, an adjusting screw is threaded on the lower adjusting seat, and the end of the adjusting screw is rotatably set on the upper adjusting seat, and a unloading slide is fixed on the upper end of the upper adjusting seat. The feed ends of the unloading slides of the four unloading slide mechanisms are respectively opposite to the length detection mechanism, the step detection mechanism, the eddy current detection mechanism and the airtightness detection mechanism, and the unloading slides extend from the discharge ports at the corresponding positions.

[0027] With the above structure, the inclination angle of the upper adjustment seat is changed by rotating the adjustment screw. When any of the length / step / eddy current / air tightness tests sends an NG signal, the pushing assembly at the corresponding station pushes the defective pipe to the feed end of the unloading chute. The step pipe slides out of the chassis along the unloading chute and falls accurately into the corresponding NG waste box.

[0028] The material receiving and conveying mechanism includes a conveying frame, which is fixed to the inner bottom side of the chassis and is located on the rear side of the feeding base frame. Conveying shafts are rotatably provided at the front and rear ends of the conveying frame, and conveying sprockets are fixed at both ends of the conveying shafts. Conveying chains are provided on the two conveying sprockets on the same side, and a number of equidistantly distributed conveying trough plates are provided on the two conveying chains. The conveying trough plates are located on the lower side of the discharging plate. A conveying motor is fixed on the conveying frame, and the output shaft of the conveying motor is transmission-connected to one of the conveying shafts.

[0029] With the above structure, qualified stepped pipes slide down from the discharge plate of the airtightness inspection station and fall precisely into the conveying trough. The output shaft of the conveying motor drives one of the conveying shafts to rotate. The conveying sprocket and conveying chain cooperate, and the conveying chain drives the conveying trough to move intermittently. The moving speed is synchronized with the inspection rhythm. After being conveyed to the end, the stepped pipe automatically slides into the next process (such as a packaging machine). An optional flipping mechanism can be used to achieve directional stacking.

[0030] Compared with the existing technology, this continuous multi-station intelligent detection and screening device has the following advantages: through the cooperation of several functional modules, the loading → length / step / eddy current / airtightness detection → sorting → material collection is seamlessly connected, and the full process automation of the pipeline from feeding to qualified product output is realized. Each mechanism is independently controlled and works collaboratively, and a rapid response is achieved through the industrial bus; the pipeline feeding mechanism intelligently prevents material stacking and feeds the material to the intermittent feeding mechanism quickly and stably; through the cooperation of the NG waste box and the unloading slide mechanism, four-level defect classification is achieved, and length / step / eddy current / airtightness NG products are independently recovered and traceable management is achieved: each waste box is equipped with an RFID tag to bind the detection data; through the cooperation of the intermittent feeding mechanism and the material receiving and conveying mechanism, stable and synchronous output of qualified products is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the general assembly structure of the present invention.

[0032] Figure 2 It is a schematic structural diagram of the present invention when the chassis is removed.

[0033] Figure 3 It is a structural diagram of the pipeline feeding mechanism in the present invention.

[0034] Figure 4 It is a structural schematic diagram of the intermittent feeding mechanism in the present invention.

[0035] Figure 5 It is a structural diagram of the length detection mechanism in the present invention.

[0036] Figure 6 It is a structural diagram of the step detection mechanism in the present invention.

[0037] Figure 7It is a structural schematic diagram of the eddy current detection mechanism in the present invention.

[0038] Figure 8 It is a structural schematic diagram of the airtight detection mechanism in the present invention.

[0039] Figure 9 It is a structural diagram of the unloading chute mechanism in the present invention.

[0040] Figure 10 It is a structural schematic diagram of the material receiving and conveying mechanism in the present invention.

[0041] In the figure, 1. Pipe feeding mechanism; 2. NG waste box; 3. Unloading slide mechanism; 4. Chassis; 5. Control touch screen; 6. Material collection and conveying mechanism; 7. Intermittent feeding mechanism; 8. Air tightness detection mechanism; 9. Eddy current detection mechanism; 10. Step detection mechanism; 11. Length detection mechanism; 12. Feeding box; 13. Unloading hopper; 14. Output motor; 15. Output crawler; 16. Lifting and discharging rack; 17. Detection sensor; 18. Lifting push rod; 19. Feeding Base frame; 20. Linkage pulley pair; 21. Rotation connecting rod; 22. Feeding motor; 23. Work station frame; 24. Feeding rack; 25. Step pipe; 26. Discharge plate; 27. Vertical frame (1); 28. Pushing guide shaft (1); 29. Pushing rod (1); 30. Fixed seat (1); 31. Pushing plate (1); 32. Base frame (1); 33. Rotation motor (1); 34. Length detection sensor; 35. Rotation mounting plate (1); 36. Mounting seat (1); 37. Pushing assembly; 38. Lifting wire Rod; 39, mounting frame; 40, Yuanxin light source; 41, visual system; 42, adjustment cylinder; 43, lifting push rod 1; 44, lifting guide shaft; 45, roller motor; 46, friction roller; 47, connecting plate; 48, eddy current detection head; 49, follow-up roller; 50, stand 2; 51, lifting push rod 2; 52, slide rail; 53, fixed seat 2; 54, push guide shaft 2; 55, push plate 2; 56, base frame 2; 57, mounting seat 2; 58, 1. Rotary motor 2; 59. Rotary mounting plate 2; 60. Sealing plug; 61. WEH connector; 62. Quick-release air guide connector; 63. Moving seat; 64. Moving guide shaft; 65. Moving cylinder; 66. Guide seat; 67. Push rod 2; 68. Unloading slide; 69. Upper adjustment seat; 70. Adjusting screw; 71. Lower adjustment seat; 72. Unloading seat; 73. Conveying rack; 74. Conveying motor; 75. Conveying chain; 76. Conveying trough plate; 77. Conveying sprocket. DETAILED DESCRIPTION

[0042] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0043] like Figures 1-10As shown, the continuous multi-station intelligent detection and screening device includes a pipe feeding mechanism 1 and a chassis 4 and four NG waste boxes 2 located on the left side of the chassis 4 and equidistantly distributed from front to back. The pipe feeding mechanism 1 extends into the interior of the chassis 4. The inner bottom side of the chassis 4 is provided with an intermittent feeding mechanism 7, a material receiving and conveying mechanism 6, four unloading chute mechanisms 3 equidistantly distributed from front to back, and a length detection mechanism 11, a step detection mechanism 10, an eddy current detection mechanism 9 and an airtightness detection mechanism 8 arranged in sequence from front to back. The material receiving and conveying mechanism 6 is located on the rear side of the intermittent feeding mechanism 7, and the intermittent feeding mechanism 7 is located on the inner side of the length detection mechanism 11, the step detection mechanism 10, the eddy current detection mechanism 9 and the airtightness detection mechanism 8. The unloading chute mechanism 3 is respectively located on the left sides of the length detection mechanism 11, the step detection mechanism 10, the eddy current detection mechanism 9 and the airtightness detection mechanism 8 at the corresponding positions. The end of the unloading chute mechanism 3 extends out of the chassis 4 and is located above the NG waste box 2 at the corresponding position.

[0044] A number of step pipes 25 are placed inside the pipe feeding mechanism 1, and the pipe feeding mechanism 1 continuously conveys the step pipes 25 to be inspected to the intermittent feeding mechanism 7 inside the chassis 4; the intermittent feeding mechanism 7 adopts step-by-step intermittent conveying, and sequentially conveys the step pipes 25 to the four inspection stations of the length detection mechanism 11, the step detection mechanism 10, the eddy current detection mechanism 9 and the airtightness detection mechanism 8, and performs length detection → step detection → eddy current detection → airtightness detection in sequence; each inspection station is equipped with an independent unloading slide mechanism 3, and when a station detects that a step pipe 25 has defects, the length detection mechanism 11, the step detection mechanism 10, the eddy current detection mechanism 9 and the airtightness detection mechanism 8 push the defective step pipe 25 into the unloading slide mechanism 3, and discharge it into the designated NG waste box 2; the qualified step pipes 25 that pass all the tests enter the material receiving and conveying mechanism 6 for collection and output.

[0045] A feed port and four discharge ports equidistantly distributed from front to back are provided on the left side of the chassis 4 . A four-color warning light is provided on the upper portion of the chassis 4 . A control touch screen 5 is provided on the chassis 4 .

[0046] The feed port is used to cooperate with the pipeline feeding mechanism 1 for feeding, and the discharge port cooperates with the unloading slide mechanism 3 to discharge the defective step pipeline 25. The four-color warning light displays the equipment operation status such as green normal, red fault, yellow standby, and blue maintenance, which is convenient for operators to monitor. The control touch screen 5 is used as a human-computer interaction interface for parameter setting, status monitoring and manual operation. The detection data is uploaded to the control touch screen 5 to generate statistical charts.

[0047] The pipeline feeding mechanism 1 includes a feeding box 12, and a tilted discharge hopper 13 is fixed to the front side of the upper end of the feeding box 12. A lifting discharge rack 16 is slidably provided in the middle part of the upper end of the feeding box 12, and a lifting push rod 18 is fixed to the rear side of the lower end of the feeding box 12. The telescopic end of the lifting push rod 18 is fixedly connected to the lifting discharge rack 16. An output crawler 15 is provided on the rear side of the upper end of the feeding box 12, and an output motor 14 is fixed to the left side of the feeding box 12. The output shaft of the output motor 14 is fixedly connected to one of the rotating shafts of the output crawler 15. A detection sensor 17 is provided on the bracket of the output crawler 15, and the output end of the output crawler 15 extends into the inside of the feed port.

[0048] A number of step pipes 25 are placed inside the discharge hopper 13. The inclined design of the discharge hopper 13 ensures that the step pipes 25 slide naturally to the area of the lifting discharge rack 16; the lifting push rod 18 pushes the lifting discharge rack 16 to lift and lower at a low speed, and lifts the step pipes 25 to a height flush with the output crawler 15 in turn, and rolls them onto the output crawler 15; the output shaft of the output motor 14 drives the output crawler 15 to work, and transports the step pipes 25 in a single row from the feed port to the intermittent feeding mechanism 7 inside the chassis 4; after the detection sensor 17 (such as a photoelectric or pressure sensor) confirms that the step pipe 25 is in place, the output crawler 15 stops transporting; the surface of the output crawler 15 can be designed with anti-slip grooves or V-grooves to ensure that the step pipe 25 enters the interior of the chassis 4 axially stably; when the detection sensor 17 detects that there is no step pipe 25, the output crawler 15 continues to transport the next step pipe 25.

[0049] The intermittent feeding mechanism 7 includes a feeding base frame 19 and a feeding rack 24. The feeding base frame 19 is arranged on the inner bottom side of the chassis 4. A feeding motor 22 and a work station frame 23 are fixed to the upper end of the feeding base frame 19. The feeding motor 22 is located on the lower side of the work station frame 23. The upper end of the feeding base frame 19 is rotatably provided with two rotation shafts. A linkage pulley pair 20 is provided between the two rotation shafts and between the output shaft of the feeding motor 22 and one of the rotation shafts. A rotation connecting rod 21 is fixed at both ends of the rotation shaft. The feeding rack 24 is located on the inner side of the work station frame 23. Vertical connecting rods are fixed at the four corners of the lower end of the feeding rack 24. The vertical connecting rod is rotatably connected to the rotation connecting rod 21 below it. A discharge plate 26 is provided on the rear side of the work station frame 23. A number of pipe grooves are provided at the upper ends of the feeding base frame 19 and the feeding rack 24.

[0050] The stepped pipe 25 is pushed into the pipe placement groove at the front end of the upper end of the feeding base frame 19, and the feeding motor 22 is started. The output shaft of the feeding motor 22 drives the two rotation shafts to rotate synchronously through the linkage pulley pair 20; the rotation shaft drives the rotation connecting rods 21 at both ends to make circular motion, thereby pushing the vertical connecting rod and the feeding rack 24 to perform a compound motion (lifting + horizontal swing); when the rotation connecting rod 21 moves to the upper semicircle, the feeding rack 24 is lifted and moved horizontally backward, and the pipe placement groove of the feeding rack 24 pushes the stepped pipe 25 into the front ... The pipe 25 is lifted from the pipe slot at the front of the feeding base frame 19. When the rotation connecting rod 21 moves to the lower semicircle, the feeding rack 24 descends and resets backward, and is placed in the last pipe slot of the feeding base frame 19 in turn, and then placed in the next pipe slot of the feeding base frame 19 by the next pipe slot of the feeding rack 24; after the inspection is completed, the step pipe 25 is pushed to the discharge plate 26 and enters the next link. The qualified products enter the material receiving and conveying mechanism 6, and the unqualified products are pushed into the unloading slide mechanism 3.

[0051] The length detection mechanism 11 includes a base frame 32 and a pushing assembly 37. The base frame 32 and the pushing assembly 37 are both arranged on the inner bottom side of the chassis 4. The base frame 32 and the pushing assembly 37 are respectively located on the left and right sides of the feeding base frame 19. The upper end of the base frame 32 is fixed with a rotation motor 33 and a mounting seat 36. The left side of the mounting seat 36 is provided with a rotation mounting plate 35. The output shaft of the rotation motor 33 is fixedly connected to the rotating shaft of the mounting seat 36. The upper end of the rotation mounting plate 35 is fixed with a length detection sensor 34. When the length detection sensor 34 is in the initial position, it is facing the pushing assembly 37 there. The rotation mounting plate 35 is provided with an air purge module.

[0052] The intermittent feeding mechanism 7 transports the step pipe 25 to the length detection station, and the pushing assembly 37 is in the standby position; the rotation mounting plate 1 35 is reset to the initial angle under the drive of the rotation motor 1 33, so that the length detection sensor 34 is facing the pushing assembly 37, and the pushing assembly 37 pushes the step pipe 25 to contact the length detection sensor 34. The two cooperate to perform length detection. If the detection is qualified, the pushing assembly 37 is reset. If the detection is unqualified, the output shaft of the rotation motor 1 33 drives the length detection sensor 34 to reset to the initial position, and is ready for the next step. If the inspection fails once, the rotary mounting plate 35 will rotate 90 degrees, which will drive the length detection sensor 34 to no longer face the pushing assembly 37. The pushing assembly 37 will push the step pipe 25 out of the intermittent feeding mechanism 7 and discharge the defective products from the corresponding unloading slide mechanism 3. Then the rotary mounting plate 35 will be reset to the initial angle under the drive of the rotary motor 33, so that the length detection sensor 34 faces the pushing assembly 37. The pushing assembly 37 will be retracted and reset to prepare for the next inspection. The air purge module will blow air to clean the step pipe 25.

[0053] The eddy current detection mechanism 9 includes a positioning cylinder 42, a pusher assembly 37 and four follower rollers 49. The positioning cylinder 42 and the pusher assembly 37 are both arranged on the inner bottom side of the chassis 4. The intermittent feeding mechanism 7 passes under the positioning cylinder 42. The pusher assembly 37 is located on the right side of the feeding chassis 19. A connecting plate 47 is fixed on the slide seat of the positioning cylinder 42. An eddy current detection head 48 is detachably provided on the connecting plate 47. The eddy current detection head 48 is directly opposite to the pusher assembly 37 there. A vertically arranged lifting and lowering device is fixed on the bracket of the positioning cylinder 42. A push rod 43, a base plate is fixed to the telescopic end of the lifting push rod 43, two lifting guide shafts 44 are fixed to the upper end of the base plate, the two lifting guide shafts 44 are located on the left and right sides of the lifting push rod 43, the two lifting guide shafts 44 are slidably set on the bracket of the positioning cylinder 42, a roller motor 45 is fixed to the lower end of the base plate, a friction roller 46 is fixed to the output shaft of the roller motor 45, four follower rollers 49 are grouped in pairs, and the two groups of follower rollers 49 are symmetrically arranged, and the two follower rollers 49 in each group are rotatably set on both sides of the work station frame 23.

[0054] The intermittent feeding mechanism 7 transports the step pipe 25 to the eddy current detection station. At this time, the step pipe 25 is located on the four follower rollers 49, the pushing assembly 37 is in the standby position, the lifting push rod 43 descends, driving the friction roller 46 to press the step pipe 25, and at the same time adjusting the cylinder 42 to fine-tune the position of the eddy current detection head 48 so that it is sleeved on the step of the step pipe 25. The roller motor 45 is started, and the output shaft of the roller motor 45 drives the friction roller 46 to rotate, driving the step pipe 25 to rotate at a uniform speed around its own axis on the four follower rollers 49; the eddy current detection head 48 continuously generates eddy current during the rotation of the step pipe 25. Radio frequency electromagnetic field is used to detect surface and near-surface defects: when cracks or uneven materials are encountered, the eddy current field is distorted and the sensor output signal fluctuates; data is transmitted to the control system in real time to generate a defect waveform diagram; after the detection is completed, the lifting push rod 43 rises, driving the roller motor 45 to reset, and if the detection is qualified, the intermittent feeding mechanism 7 will transport the step pipe 25 to the next station (airtightness detection mechanism 8); if the detection is unqualified, the pushing component 37 will push the step pipe 25 out of the intermittent feeding mechanism 7, and discharge the defective product from the corresponding unloading slide mechanism 3. After being pushed out, the pushing component 37 will be retracted and reset to prepare for the next detection.

[0055] The step detection mechanism 10 includes a lifting wire rod 38, a pushing assembly 37 and a far-new light source 40. The lifting wire rod 38 and the pushing assembly 37 are respectively located on the left and right sides of the feeding base frame 19. The lifting wire rod 38 is fixed on the front side of the bracket of the positioning cylinder 42. A mounting frame 39 is fixed on the slide seat of the lifting wire rod 38. A visual system 41 is provided on the mounting frame 39. The far-new light source 40 is fixed on the left side of the work station frame 23. The visual system 41 is located directly above the far-new light source 40. The pushing assembly 37 there is directly between the far-new light source 40 and the visual system 41.

[0056] The intermittent feeding mechanism 7 transports the step pipe 25 to the step detection station. The step of the step pipe 25 is located between the telecentric light source 40 and the visual system 41. The telecentric light source 40 emits parallel light to evenly illuminate the end face of the step pipe 25, eliminating edge optical distortion and ensuring clear imaging. The lifting wire rod 38 drives the mounting frame 39 (equipped with the visual system 41) to move up and down. The visual system 41 performs automatic focus and determines the optimal focal length through laser ranging or image clarity algorithm; after positioning is completed, the height is locked to ensure detection consistency, and the visual system 41 takes a picture of the step pipe 25. A high-definition image of the end face of the step pipe 25 (resolution is usually ≥5 million pixels) is taken; the image processing algorithm detects the following features: step height (calculated by shadow contrast), chamfer angle (edge profile fitting), burrs / defects (morphological analysis); if the test is qualified, the intermittent feeding mechanism 7 conveys the step pipe 25 to the next station (eddy current testing mechanism 9); if the test is unqualified, the pushing assembly 37 pushes the step pipe 25 out of the intermittent feeding mechanism 7, and the defective product is discharged from the corresponding unloading chute mechanism 3. After being pushed out, the pushing assembly 37 is retracted and reset to prepare for the next test.

[0057] The pushing assembly 37 includes a stand 27, which is fixed to the inner bottom side of the chassis 4, and a fixed seat 30 is fixed to the upper end of the stand 27, and a horizontally arranged pushing rod 29 is fixed on the fixed seat 30, and a pushing plate 31 is fixed to the telescopic end of the pushing rod 29, and two pushing guide shafts 28 are fixed to the right side of the pushing plate 31, and the two pushing guide shafts 28 are located on the front and rear sides of the pushing rod 29, and the two pushing guide shafts 28 are slidably set on the fixed seat 30, and the pushing plates 31 of the three pushing assemblies 37 are respectively opposite to the length detection sensors 34 and eddy current detection heads 48 and between the Yuanxin light source 40 and the visual system 41 at the corresponding positions.

[0058] As a multi-station collaborative positioning mechanism, the pushing assembly 37 undertakes the following core functions in the detection process: detection coordination: forming a linkage with length, eddy current, and step detection to ensure the consistency of detection posture; anti-interference avoidance: completely exiting the detection area during non-working hours to avoid affecting the operation of other mechanisms; in standby mode, the pushing rod 29 is in a retracted state, and the pushing plate 31 retreats to the right side of the intermittent feeding mechanism 7, and is stabilized by two pushing guide shafts 28. When the step pipe 25 enters the work station and needs to be pushed, the pushing rod 29 extends, and the stroke is adjustable according to the pipe length, and the pushing plate 31 pushes the step pipe 25 to the right; after the detection is completed, the pushing rod 29 immediately retracts, and the pushing guide shaft 28 guides the pushing plate 31 to accurately reset, making way for the next step pipe 25 to be transported.

[0059] The airtightness detection mechanism 8 includes a base frame 2 56 and a vertical frame 2 50. The base frame 2 56 and the vertical frame 2 50 are both fixed to the inner bottom side of the chassis 4. The base frame 2 56 and the vertical frame 2 50 are respectively located on the left and right sides of the feeding base frame 19. The left side of the vertical frame 2 50 is fixed with a lifting push rod 2 51 and a slide rail 52. The slide rail 52 is slidably provided with a fixed seat 2 53. The fixed seat 2 53 is fixed to the upper end of the telescopic end of the lifting push rod 2 51. A pushing push rod 2 67 is fixed on the fixed seat 2 53. The telescopic end of the pushing push rod 2 67 is fixed with a pushing plate 2 55. Two pushing guide shafts 2 54 are fixed to the right side of the pushing plate 2 55. The two pushing guide shafts 2 54 are located on the front and rear sides of the pushing push rod 2 67. The two pushing guide shafts 2 54 are slidably set on the fixed seat 2 53. The upper end of the pushing plate 2 55 is fixed with a guide seat 66. A horizontally arranged moving cylinder 65 is fixed on the guide seat 66, and a moving seat 63 is fixed to the telescopic end of the moving cylinder 65. Four moving guide shafts 64 are fixed to the right side of the moving seat 63, and the four moving guide shafts 64 are slidably set on the guide seat 66. A WEH connector 61 is fixed to the left side of the moving seat 63, and the right end of the WEH connector 61 is connected to a quick-release air guide connector 62, and the quick-release air guide connector 62 is connected to an external air pump. A rotation motor 2 58 and a mounting seat 2 57 are fixed to the upper end of the base frame 2 56, and a rotation mounting plate 2 59 is provided on the left side of the mounting seat 2 57. The output shaft of the rotation motor 2 58 is fixedly connected to the rotating shaft of the mounting seat 2 57, and a sealing plug 60 is fixed to the upper end of the rotation mounting plate 2 59. The sealing plug 60 is opposite to the WEH connector 61 when it is in the initial position.

[0060] The intermittent feeding mechanism 7 transports the step pipe 25 to the airtightness detection station, and the lifting push rod 2 51 drives the fixed seat 2 53 to slide up and down on the slide rail 52, so that the WEH joint 61 is facing the step pipe 25. The rotation mounting plate 2 59 is reset to the initial angle under the drive of the rotation motor 2 58, so that the sealing plug 60 is facing the WEH joint 61. In the standby state, the moving cylinder 65 is in the retracted state, and the sealing plug 60 returns to the right side of the intermittent feeding mechanism 7 and is stabilized by the four moving guide shafts 64; the moving cylinder 65 pushes the moving seat 63 moves to the left, and the four moving guide shafts 64 slide on the guide seat 66 to ensure that the moving seat 63 moves stably. The WEH joint 61 presses the right end of the step pipe 25, and the left end of the step pipe 25 presses the sealing plug 60 to form a double-end seal. The external air pump injects air into the quick-release air guide joint 62, and injects air into the inside of the step pipe 25 through the WEH joint 61. The pressure is maintained for 3-5 seconds, and the pressure decay rate is monitored. If the test is qualified, the moving cylinder 65 pushes the moving seat 63 to the right, pulls the WEH joint 61 back to the right, and the intermittent feeding mechanism 7 is The step pipe 25 is transported to the receiving and conveying mechanism 6; if the test fails, the output shaft of the rotary motor 2 58 drives the rotary mounting plate 1 35 to rotate 90 degrees, that is, the sealing plug 60 is no longer facing the step pipe 25; the lifting push rod 2 51 drives the fixed seat 2 53 to slide up and down on the slide rail 52, so that the push plate 2 55 is facing the step pipe 25; the push rod 2 67 is extended, and the stroke is adjustable according to the pipe length. The push plate 2 55 pushes the step pipe 25 to the right, and the step pipe 25 is stabilized and limited by the two push guide shafts 2 54. The feeding mechanism 7 is pushed out to discharge defective products from the corresponding unloading slide mechanism 3; after the inspection is completed, the pushing rod 2 67 is immediately retracted, and the pushing guide shaft 2 54 guides the pushing plate 31 to be accurately reset, making way for the next step pipe 25 to be transported. At the same time, the lifting push rod 2 51 drives the fixed seat 2 53 to slide up and down on the slide rail 52, so that the WEH joint 61 is facing the step pipe 25, and the rotation mounting plate 2 59 is reset to the initial angle under the drive of the rotation motor 2 58, so that the sealing plug 60 is facing the WEH joint 61, ready for the next inspection.

[0061] The unloading chute mechanism 3 includes a unloading seat 72, which is fixed on the inner bottom side of the chassis 4. A lower adjusting seat 71 is fixed on the upper end of the unloading seat 72, and an upper adjusting seat 69 is hinged on the upper end of the lower adjusting seat 71. A positioning screw 70 is screwed on the lower adjusting seat 71, and the end of the positioning screw 70 is rotatably set on the upper adjusting seat 69. A unloading chute 68 is fixed on the upper end of the upper adjusting seat 69. The feed ends of the unloading chutes 68 of the four unloading chute mechanisms 3 are respectively facing the length detection mechanism 11, the step detection mechanism 10, the eddy current detection mechanism 9 and the airtightness detection mechanism 8, and the unloading chute 68 extends from the discharge port at the corresponding position.

[0062] By rotating the adjusting screw 70 to change the inclination angle of the upper adjusting seat 69, when any of the length / step / eddy current / air tightness detection sends an NG signal, the pushing assembly 37 of the corresponding workstation pushes the defective tube to the feed end of the unloading chute 68, and the step pipe 25 slides out of the chassis 4 along the unloading chute 68 and falls accurately into the corresponding NG waste box 2.

[0063] The material receiving and conveying mechanism 6 includes a conveying frame 73, which is fixed to the inner bottom side of the chassis 4, and the conveying frame 73 is located on the rear side of the feeding base frame 19. The front and rear ends of the conveying frame 73 are rotatably provided with conveying shafts, and both ends of the conveying shafts are fixed with conveying sprockets 77. The two conveying sprockets 77 on the same side are provided with conveying chains 75, and the two conveying chains 75 are provided with a number of equidistantly distributed conveying trough plates 76. The conveying trough plates 76 are located on the lower side of the discharge plate 26. A conveying motor 74 is fixed on the conveying frame 73, and the output shaft of the conveying motor 74 is connected to one of the conveying shafts through a transmission connection.

[0064] The qualified stepped pipe 25 slides down from the discharge plate 26 of the airtightness detection station and falls accurately into the conveying trough plate 76. The output shaft of the conveying motor 74 drives one of the conveying shafts to rotate, and the conveying sprocket 77 and the conveying chain 75 cooperate. The conveying chain 75 drives the conveying trough plate 76 to move intermittently in steps. The moving speed is synchronized with the detection beat. After the stepped pipe 25 is conveyed to the end, it automatically slides into the next process (such as a packaging machine). An optional flipping mechanism can be used to achieve directional stacking.

[0065] The working principle of the present invention is as follows: a plurality of step pipes 25 are placed inside the discharge hopper 13. The inclined design of the discharge hopper 13 ensures that the step pipes 25 slide naturally to the area of the lifting discharge rack 16; the lifting push rod 18 drives the lifting discharge rack 16 to lift and lower at a low speed, and lifts the step pipes 25 to a height flush with the output crawler 15 in turn, and rolls them onto the output crawler 15; the output shaft of the output motor 14 drives the output crawler 15 to work, and conveys the step pipes 25 in a single row from the feed port to the intermittent feeding mechanism 7 inside the chassis 4; after the detection sensor 17 (such as a photoelectric or pressure sensor) confirms that the step pipe 25 is in place, the output crawler 15 stops conveying; the surface of the output crawler 15 can be designed with anti-skid patterns or V-grooves to ensure that the step pipe 25 enters the interior of the chassis 4 axially stably; when the detection sensor 17 detects that there is no step pipe 25, the output crawler 15 continues to convey the next step pipe 25; The stepped pipe 25 is pushed into the pipe placement groove at the front end of the upper end of the feeding chassis 19, and the feeding motor 22 is started. The output shaft of the feeding motor 22 drives the two rotation shafts to rotate synchronously through the linkage pulley pair 20; the rotation shaft drives the rotation connecting rods 21 at both ends to make circular motion, thereby pushing the vertical connecting rod and the feeding rack 24 to perform a compound motion (lifting + horizontal swing); when the rotation connecting rod 21 moves to the upper semicircle, the feeding rack 24 is lifted and moves horizontally backward, and the pipe placement groove of the feeding rack 24 is opened. The stepped pipe 25 is lifted from the frontmost pipe placement groove of the feeding chassis 19. When the rotation connecting rod 21 moves to the lower semicircle, the feeding rack 24 is lowered and reset backward, and is placed in the next pipe placement groove of the feeding chassis 19 in turn. Then, the next pipe placement groove of the feeding rack 24 is placed in the next pipe placement groove of the feeding chassis 19, and the stepped pipe 25 is sent to the four inspection stations of the length detection mechanism 11, the step detection mechanism 10, the eddy current detection mechanism 9 and the airtightness detection mechanism 8 in turn. Length detection: The air purge module blows air to clean the step pipe 25, and the pusher assembly 37 is in the standby position; the rotation mounting plate 1 35 is reset to the initial angle under the drive of the rotation motor 1 33, so that the length detection sensor 34 is facing the pusher assembly 37, and the pusher assembly 37 pushes the step pipe 25 to contact the length detection sensor 34. The two cooperate to perform length detection. If the detection is qualified, the pusher assembly 37 is reset, and the intermittent feeding mechanism 7 transports the step pipe 25 to the step detection station (step detection mechanism 10). If the detection is unqualified, the rotation motor 1 3 The output shaft of 3 drives the length detection sensor 34 to reset to the initial position, ready for the next test. If the test fails, the rotary mounting plate 1 35 rotates 90 degrees, that is, the length detection sensor 34 is no longer facing the pusher assembly 37. The pusher assembly 37 pushes the step pipe 25 out of the intermittent feeding mechanism 7 and discharges the defective products from the corresponding unloading chute mechanism 3. Then, the rotary mounting plate 1 35 is driven by the rotary motor 1 33 to reset to the initial angle, so that the length detection sensor 34 faces the pusher assembly 37. The pusher assembly 37 is retracted and reset to prepare for the next test. Step detection: The step of the step pipe 25 is located between the telecentric light source 40 and the vision system 41. The telecentric light source 40 emits parallel light to evenly illuminate the end face of the step pipe 25, eliminating edge optical distortion and ensuring clear imaging. The lifting screw rod 38 drives the mounting frame 39 (equipped with the vision system 41) to move up and down. The vision system 41 performs automatic focus and determines the optimal focal length through laser ranging or image clarity algorithm. After positioning is completed, the height is locked to ensure detection consistency. The vision system 41 takes a high-definition image of the end face of the step pipe 25 (resolution is usually ≥5 million pixels). The image processing algorithm detects the following features: step height (calculated by shadow contrast), chamfer angle (edge contour fitting), burrs / defects (morphological analysis). If the inspection is qualified, the intermittent feeding mechanism 7 transports the step pipe 25 to the next workstation (eddy current detection mechanism 9). If the inspection fails, the pusher assembly 37 pushes the step pipe 25 out of the intermittent feeding mechanism 7 and discharges the defective product from the corresponding unloading chute mechanism 3. After being pushed out, the pusher assembly 37 retracts and resets to prepare for the next inspection. Eddy current detection: The intermittent feeding mechanism 7 transports the step pipe 25 to the eddy current detection station. At this time, the step pipe 25 is located on the four follower rollers 49, the pushing assembly 37 is in the standby position, the lifting push rod 43 descends, driving the friction roller 46 to press the step pipe 25, and at the same time, the adjustment cylinder 42 fine-tunes the position of the eddy current detection head 48 so that it is sleeved on the step of the step pipe 25. The roller motor 45 is started, and the output shaft of the roller motor 45 drives the friction roller 46 to rotate, driving the step pipe 25 to rotate at a uniform speed around its own axis on the four follower rollers 49; the eddy current detection head 48 rotates during the rotation of the step pipe 25. Continuously emit high-frequency electromagnetic fields to detect surface and near-surface defects: When encountering cracks or uneven materials, the eddy current field is distorted and the sensor output signal fluctuates; data is transmitted to the control system in real time to generate a defect waveform diagram; after the inspection is completed, the lifting push rod 43 rises, driving the roller motor 45 to reset. If the inspection is qualified, the intermittent feeding mechanism 7 transports the step pipe 25 to the next station (airtightness inspection mechanism 8); if the inspection fails, the pusher assembly 37 pushes the step pipe 25 out of the intermittent feeding mechanism 7, and the defective product is discharged from the corresponding unloading chute mechanism 3. After being pushed out, the pusher assembly 37 retracts and resets to prepare for the next inspection; Airtightness test: the lifting push rod 2 51 drives the fixed seat 2 53 to slide up and down on the slide rail 52, so that the WEH joint 61 is facing the step pipe 25, and the rotary mounting plate 2 59 is reset to the initial angle under the drive of the rotary motor 2 58, so that the sealing plug 60 is facing the WEH joint 61. In the standby state, the moving cylinder 65 is in the retracted state, and the sealing plug 60 returns to the right side of the intermittent feeding mechanism 7 and is stabilized by the four moving guide shafts 64; the moving cylinder 65 pushes the moving seat 63 to move to the left, and the four moving guide shafts 64 slides on the guide seat 66 to ensure that the moving seat 63 moves stably, the WEH joint 61 presses the right end of the step pipe 25, and the left end of the step pipe 25 presses the sealing plug 60 to form a double-end seal, and the external air pump injects air into the quick-release air guide joint 62, and injects air into the inside of the step pipe 25 through the WEH joint 61, maintains pressure for 3-5 seconds, and monitors the pressure decay rate; if the test is qualified, the moving cylinder 65 pushes the moving seat 63 to the right, pulls the WEH joint 61 back to the right, and the intermittent feeding mechanism 7 conveys the step pipe 25 to The receiving and conveying mechanism 6; if the inspection fails, the output shaft of the rotary motor 58 drives the rotary mounting plate 35 to rotate 90 degrees, that is, the sealing plug 60 is no longer facing the step pipe 25; the lifting push rod 51 drives the fixed seat 53 to slide up and down on the slide rail 52, so that the push plate 55 is facing the step pipe 25; the push rod 67 extends, and the stroke is adjustable according to the pipe length. The push plate 55 pushes the step pipe 25 to the right, and the two push guide shafts 54 are used to stabilize and limit the step pipe 25 from the intermittent feeding mechanism. 7 is pushed out, and the defective products are discharged from the corresponding unloading slide mechanism 3; after the inspection is completed, the push rod 67 is immediately retracted, and the push guide shaft 54 guides the push plate 31 to accurately reset, making way for the next step pipe 25 to be transported. At the same time, the lifting push rod 51 drives the fixed seat 53 to slide up and down on the slide rail 52, so that the WEH joint 61 is facing the step pipe 25. The rotation mounting plate 59 is reset to the initial angle under the drive of the rotation motor 58, so that the sealing plug 60 is facing the WEH joint 61, ready for the next inspection; The qualified stepped pipe 25 slides down from the discharge plate 26 of the airtightness detection station and falls accurately into the conveying trough plate 76. The output shaft of the conveying motor 74 drives one of the conveying shafts to rotate, and the conveying sprocket 77 and the conveying chain 75 cooperate. The conveying chain 75 drives the conveying trough plate 76 to move intermittently in steps. The moving speed is synchronized with the detection beat. After the stepped pipe 25 is conveyed to the end, it automatically slides into the next process (such as a packaging machine). An optional flipping mechanism can be used to achieve directional stacking.

[0066] In summary, through the cooperation of several functional modules, the seamless connection of loading → length / step / eddy current / airtightness detection → sorting → material collection is achieved, and the full process automation of the pipeline from material feeding to qualified product output is realized. Each mechanism is independently controlled and works collaboratively, and a rapid response is achieved through the industrial bus; the pipeline feeding mechanism 1 is used to intelligently prevent material stacking, and the material is fed quickly and stably to the intermittent feeding mechanism 7; through the cooperation of the NG waste box 2 and the unloading slide mechanism 3, four-level defect classification is achieved, and length / step / eddy current / airtightness NG products are independently recycled, and traceable management is achieved: each waste box is equipped with an RFID tag to bind the detection data; through the cooperation of the intermittent feeding mechanism 7 and the material collection and conveying mechanism 6, stable and synchronous output of qualified products is achieved.

[0067] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A continuous multi-station intelligent detection and screening device, comprising a pipe feeding mechanism (1), a chassis (4), and four NG waste bins (2) located on the left side of the chassis (4) and equidistantly distributed from front to back, characterized in that: The pipe feeding mechanism (1) extends into the interior of the chassis (4). The interior bottom side of the chassis (4) is provided with an intermittent feeding mechanism (7), a receiving and conveying mechanism (6), four unloading chute mechanisms (3) arranged equidistantly from front to back, and a length detection mechanism (11), a step detection mechanism (10), an eddy current detection mechanism (9), and an airtightness detection mechanism (8) arranged in sequence from front to back. The receiving and conveying mechanism (6) is located at the rear side of the intermittent feeding mechanism (7). The intermittent feeding mechanism (7) is located inside the length detection mechanism (11), the step detection mechanism (10), the eddy current detection mechanism (9), and the airtightness detection mechanism (8). The unloading chute mechanism (3) is located on the left side of the length detection mechanism (11), the step detection mechanism (10), the eddy current detection mechanism (9), and the airtightness detection mechanism (8) at the corresponding positions. The end of the unloading chute mechanism (3) extends out of the chassis (4) and is located above the NG waste box (2) at the corresponding position.

2. A continuous multi-station intelligent detection and screening device according to claim 1, characterized in that: The left side of the chassis (4) is provided with a feed port and four discharge ports equidistantly distributed from front to back. A four-color warning light is provided on the top of the chassis (4). A control touch screen (5) is provided on the chassis (4).

3. A continuous multi-station intelligent detection and screening device according to claim 2, characterized in that: The pipeline feeding mechanism (1) comprises a feeding box (12), a tilted discharge hopper (13) is fixed on the front side of the upper end of the feeding box (12), a lifting discharge rack (16) is slidably provided on the middle part of the upper end of the feeding box (12), a lifting push rod (18) is fixed on the rear side of the lower end of the feeding box (12), the telescopic end of the lifting push rod (18) is fixedly connected to the lifting discharge rack (16), an output crawler (15) is provided on the rear side of the upper end of the feeding box (12), an output motor (14) is fixed on the left side of the feeding box (12), the output shaft of the output motor (14) is fixedly connected to one of the rotating shafts of the output crawler (15), a detection sensor (17) is provided on the bracket of the output crawler (15), and the output end of the output crawler (15) extends into the inside of the feeding port.

4. A continuous multi-station intelligent detection and screening device according to claim 3, characterized in that: The intermittent feeding mechanism (7) includes a feeding base (19) and a feeding frame (24). The feeding base (19) is arranged on the inner bottom side of the chassis (4). A feeding motor (22) and a station frame (23) are fixed to the upper end of the feeding base (19). The feeding motor (22) is located on the lower side of the station frame (23). The upper end of the feeding base (19) is provided with two rotation shafts. The two rotation shafts and the output shaft of the feeding motor (22) are connected to one of the rotation shafts. A linkage pulley pair (20) is provided between the work stations, and a rotation connecting rod (21) is fixed at both ends of the rotation shaft. The feeding rack (24) is located on the inner side of the work station rack (23). The four corners of the lower end of the feeding rack (24) are fixed with vertical connecting rods, and the vertical connecting rods are rotatably connected to the rotation connecting rods (21) below them. A discharge plate (26) is provided on the rear side of the work station rack (23), and a plurality of pipe grooves are provided on the upper ends of the feeding base frame (19) and the feeding rack (24).

5. A continuous multi-station intelligent detection and screening device according to claim 4, characterized in that: The length detection mechanism (11) includes a base frame (32) and a pusher assembly (37). The base frame (32) and the pusher assembly (37) are both arranged on the inner bottom side of the chassis (4). The base frame (32) and the pusher assembly (37) are respectively located on the left and right sides of the feeding base frame (19). A rotary motor (33) and a mounting seat (36) are fixed on the upper end of the base frame (32). A rotary mounting plate (35) is provided on the left side of the mounting seat (36). The output shaft of the rotary motor (33) is fixedly connected to the rotating shaft of the mounting seat (36). A length detection sensor (34) is fixed on the upper end of the rotary mounting plate (35). When the length detection sensor (34) is in the initial position, it is opposite to the pusher assembly (37) there. An air purge module is provided on the rotary mounting plate (35).

6. A continuous multi-station intelligent detection and screening device according to claim 5, characterized in that: The eddy current detection mechanism (9) includes a positioning cylinder (42), a pusher assembly (37) and four follower rollers (49). The positioning cylinder (42) and the pusher assembly (37) are both arranged on the inner bottom side of the chassis (4). The intermittent feeding mechanism (7) passes through the bottom of the positioning cylinder (42). The pusher assembly (37) is located on the right side of the feeding base frame (19). A connecting plate (47) is fixed on the slide seat of the positioning cylinder (42). An eddy current detection head (48) is detachably provided on the connecting plate (47). The eddy current detection head (48) is directly opposite to the pusher assembly (37) at this location. A vertical A lifting push rod (43) is provided, and a base plate is fixed to the telescopic end of the lifting push rod (43). Two lifting guide shafts (44) are fixed to the upper end of the base plate. The two lifting guide shafts (44) are located on the left and right sides of the lifting push rod (43). The two lifting guide shafts (44) are slidably arranged on the bracket of the adjustment cylinder (42). A roller motor (45) is fixed to the lower end of the base plate. A friction roller (46) is fixed to the output shaft of the roller motor (45). Four follower rollers (49) are arranged in groups of two. The two groups of follower rollers (49) are symmetrically arranged. The two follower rollers (49) in each group are rotatably arranged on both sides of the work station frame (23).

7. A continuous multi-station intelligent detection and screening device according to claim 6, characterized in that: The step detection mechanism (10) includes a lifting wire rod (38), a pushing assembly (37) and a far-new light source (40). The lifting wire rod (38) and the pushing assembly (37) are respectively located on the left and right sides of the feeding base frame (19). The lifting wire rod (38) is fixed to the front side of the bracket of the adjustment cylinder member (42). A mounting frame (39) is fixed on the slide seat of the lifting wire rod (38). A visual system (41) is provided on the mounting frame (39). The far-new light source (40) is fixed on the left side of the work station frame (23). The visual system (41) is located directly above the far-new light source (40). The pushing assembly (37) therein is directly between the far-new light source (40) and the visual system (41).

8. The continuous multi-station intelligent detection and screening device according to claim 7, characterized in that: The pushing assembly (37) includes a stand (27), which is fixed to the inner bottom side of the chassis (4), a fixed seat (30) is fixed to the upper end of the stand (27), a horizontally arranged pushing rod (29) is fixed on the fixed seat (30), a pushing plate (31) is fixed to the telescopic end of the pushing rod (29), two pushing guide shafts (28) are fixed to the right side of the pushing plate (31), the two pushing guide shafts (28) are located on the front and rear sides of the pushing rod (29), the two pushing guide shafts (28) are slidably set on the fixed seat (30), and the pushing plates (31) of the three pushing assemblies (37) are respectively opposite to the length detection sensor (34) and the eddy current detection head (48) at the corresponding positions and between the Yuanxin light source (40) and the visual system (41).

9. The continuous multi-station intelligent detection and screening device according to claim 8, characterized in that: The airtightness detection mechanism (8) includes a base frame 2 (56) and a vertical frame 2 (50). The base frame 2 (56) and the vertical frame 2 (50) are fixed to the inner bottom side of the chassis (4). The base frame 2 (56) and the vertical frame 2 (50) are respectively located on the left and right sides of the feeding base frame (19). A lifting push rod 2 (51) and a slide rail (52) are fixed on the left side of the vertical frame 2 (50). A fixed seat 2 (53) is slidably provided on the slide rail (52). The fixed seat 2 (53) is fixed on the lifting push rod. The upper end of the telescopic end of the rod 2 (51) is fixed with a push rod 2 (67) on the fixed seat 2 (53), and the telescopic end of the push rod 2 (67) is fixed with a push plate 2 (55). The right side of the push plate 2 (55) is fixed with two push guide shafts 2 (54). The two push guide shafts 2 (54) are located on the front and rear sides of the push rod 2 (67). The two push guide shafts 2 (54) are slidably set on the fixed seat 2 (53). The upper end of the push plate 2 (55) is fixed with A guide seat (66) is fixed with a horizontally arranged mobile cylinder (65) on the guide seat (66), and a mobile seat (63) is fixed to the telescopic end of the mobile cylinder (65). Four mobile guide shafts (64) are fixed to the right side of the mobile seat (63), and the four mobile guide shafts (64) are slidably arranged on the guide seat (66). A WEH connector (61) is fixed to the left side of the mobile seat (63), and the right end of the WEH connector (61) is connected to a quick-release air guide connector (62). The quick-release air guide connector (62) is connected to an external air pump. A rotary motor (58) and a mounting seat (57) are fixed to the upper end of the base frame (56). A rotary mounting plate (59) is provided on the left side of the mounting seat (57). The output shaft of the rotary motor (58) is fixedly connected to the rotating shaft of the mounting seat (57). A sealing plug (60) is fixed to the upper end of the rotary mounting plate (59). The sealing plug (60) is opposite to the WEH connector (61) when it is in the initial position.

10. A continuous multi-station intelligent detection and screening device according to claim 9, characterized in that: The unloading slide mechanism (3) includes a unloading seat (72), which is fixed to the inner bottom side of the chassis (4), and a lower adjustment seat (71) is fixed to the upper end of the unloading seat (72), and an upper adjustment seat (69) is hinged to the upper end of the lower adjustment seat (71), and an adjusting screw (70) is screwed on the lower adjustment seat (71), and the end of the adjusting screw (70) is rotatably set on the upper adjustment seat (69). A unloading slide (68) is fixed to the upper end of the upper adjustment seat (69), and the feed ends of the unloading slides (68) of the four unloading slide mechanisms (3) are respectively opposite to the length detection mechanism (11), the step detection mechanism (10), the eddy current detection mechanism (9) and the airtightness detection mechanism (8), and the unloading slide (68) is connected from The discharge port at the corresponding position extends out; the material receiving and conveying mechanism (6) includes a conveying frame (73), the conveying frame (73) is fixed to the inner bottom side of the chassis (4), and the conveying frame (73) is located on the rear side of the feeding base frame (19), the front and rear ends of the conveying frame (73) are rotatably provided with a conveying shaft, and both ends of the conveying shaft are fixed with a conveying sprocket (77), and the two conveying sprockets (77) on the same side are provided with a conveying chain (75), and the two conveying chains (75) are provided with a plurality of equally distributed conveying trough plates (76), and the conveying trough plates (76) are located on the lower side of the discharge plate (26). A conveying motor (74) is fixed on the conveying frame (73), and the output shaft of the conveying motor (74) is transmission-connected to one of the conveying shafts.

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