Valve port pocket visual inspection and rejection mechanism

Abstract

The valve bag visual detection and rejection mechanism comprises a rack, a conveying device, a visual detection device, a genuine product output device, a waste product output device and a rejection device, and the conveying device is provided with a conveying channel for conveying valve bags; the visual detection device comprises at least two groups of cameras and matched upper and lower illuminating light sources arranged on the upper side of the conveying channel; the upper illuminating light source is arranged on the upper side of the conveying channel, the lower illuminating light source is arranged on the lower side of the conveying channel, and all the cameras are arranged on the upper side of the conveying channel and collect images of the valve bags illuminated by the upper and lower light sources. The illuminating light sources are arranged on the upper and lower sides of the conveying channel, and the cameras are arranged on the upper side in cooperation, so that the omnibearing image collection of the upper and lower surfaces of the valve bags is realized, the detection blind area under the single light source illumination is eliminated, the genuine products and waste products are automatically separated by the rejection device and output to the corresponding output devices, the integrated automatic operation of detection, separation and rejection is realized, and the separation path is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the technical field of valve bag production equipment, and in particular to a valve bag visual inspection and rejection mechanism. Background Technology

[0002] Valve bags, widely used for packaging powdery and granular materials, require strict control over their opening size, appearance, and sealing quality for subsequent automated filling processes. On the production line, finished bags undergo quality inspection to separate defective from genuine products.

[0003] Currently, the quality inspection and sorting processes after valve bag production mostly rely on manual visual inspection and sorting, or simple baffle-type rejection devices. Manual methods are inefficient, labor-intensive, and prone to missed or false detections due to visual fatigue. Existing automated visual inspection equipment typically only has a camera and light source on one side of the conveyor, acquiring image information from only a single surface of the valve bag. Areas such as the bottom surface and bottom seal, which are obscured or difficult to be evenly covered by light, easily create blind spots, making it impossible to comprehensively acquire information on the appearance, dimensions, and sealing quality of both sides of the valve bag, leading to missed defects.

[0004] Furthermore, when such equipment detects defective products, the rejection mechanism often uses lateral force methods such as pushing plates or blowing air, which can easily cause secondary damage or positional displacement to the thin and not fully shaped valve bags. This results in unreliable diversion paths and makes it difficult to achieve stable and accurate automatic diversion of positive defective products. Therefore, an integrated device is needed that can comprehensively acquire the quality information of the upper and lower surfaces of the valve bag and achieve reliable automatic diversion. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a visual inspection and rejection mechanism for bag quality that can comprehensively acquire bag quality information and achieve stable and reliable automatic diversion valve bag rejection.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: a valve bag visual inspection and rejection mechanism, including a frame, a conveying device, a visual inspection device, a good product output device, a waste product output device, and a waste rejection device. The conveying device has a conveying channel for conveying valve bags. The visual inspection device includes at least two sets of cameras disposed on the upper side of the conveying channel, and at least one set of upper lighting sources and at least one set of lower lighting sources respectively provided for the at least two sets of cameras. The upper lighting sources are disposed on the upper side of the conveying channel, and the cameras are disposed on the upper side of the conveying channel to capture images of the stickers on the valve bags illuminated by the upper light source. The lower lighting sources are disposed on the lower side of the conveying channel, and the cameras are disposed on the upper side of the conveying channel to capture images of the valve opening folds and overlaps of the valve bags illuminated by the lower light source passing through the valve bags. After the visual inspection device performs image acquisition and processing, the waste rejection device rejects the waste products.

[0007] Preferably, the rejection device is located after the output end of the conveying device, and includes a rotating frame and a rotational power source that drives the rotating frame to swing about a horizontal axis near one end of the conveying device. The rotating frame is provided with a rotating receiving surface for conveying valve bags. The rotating frame has a first swing position and a second swing position. In the first swing position, the input end of the rotating receiving surface is connected to the output end of the conveying device, and the output end is connected to the good product output device, conveying the valve bags to the good product output device. In the second swing position, the input end of the rotating receiving surface is connected to the output end of the conveying device, and the output end is connected to the waste product output device, conveying the valve bags to the waste product output device.

[0008] Preferably, the waste rejection device further includes a winding roller, the rotating frame is rotatably connected to the frame through the winding roller, the winding roller is located at one end of the rotating frame near the conveying device, and a guide roller is provided at the end of the rotating frame away from the conveying device. The rotating bearing surface is a rotating belt wound around the winding roller and the guide roller or a platform provided on the rotating frame.

[0009] Preferably, the rotational power source is a cylinder, the cylinder body of which is hinged to the frame, and the piston rod of which is hinged to the rotating frame.

[0010] Preferably, the rotational power source includes a rotational motor, a rotational main shaft, and a rotational support arm. The rotational motor is mounted on the frame and its output end is connected to the rotational main shaft for transmission. One end of the rotational support arm is hinged to the rotational frame, and the other end is provided with a rotational bushing. The rotational bushing is eccentrically connected to the rotational main shaft.

[0011] Preferably, the conveying device includes a front conveyor belt and a rear conveyor belt arranged in series, the upper surfaces of the front conveyor belt and the rear conveyor belt together forming the conveying channel of the conveying valve bag, and the front conveyor belt and the rear conveyor belt are both equipped with suction components.

[0012] Preferably, there is a gap between the front conveyor belt and the rear conveyor belt, the lower lighting source is disposed in the gap, and the camera, which is matched with the lower lighting source, is disposed on the upper side of the conveying device facing the gap, so as to capture an image of the lower surface of the valve bag illuminated by the lower lighting source through the gap.

[0013] Preferably, the upper lighting source is tilted and positioned above the rear conveyor belt, with its illumination area covering the input end of the rear conveyor belt. The shooting area of ​​the camera, which is paired with the upper lighting source, also covers the input end of the rear conveyor belt, so as to capture images of the upper surface of the valve bag and the bag opening illuminated by the tilted upper lighting source.

[0014] Preferably, the suction assembly includes a suction box disposed inside the front conveyor belt and the rear conveyor belt, and a suction device communicating with the suction box. Air holes are evenly distributed on the belt surfaces of the front conveyor belt and the rear conveyor belt.

[0015] The beneficial effects of this utility model are:

[0016] 1. By setting up lighting sources on the upper and lower sides of the conveying device and configuring cameras independently for each group of light sources, double-sided visual inspection of the upper and lower surfaces of the valve bag is realized. This layout effectively eliminates the blind spots caused by shadows or changes in bag shape due to a single-direction light source. It can comprehensively acquire quality information such as the appearance and size of the bag opening, bag body and seal, significantly improving the comprehensiveness and accuracy of the inspection.

[0017] 2. By setting up a swingable rejection device, the conveying and diversion functions of the detected valve bag are integrated into one unit. Based on the visual inspection signal, the rotating frame can switch between different swing positions, so that the rotating receiving surface smoothly guides the good bags and the waste bags to the corresponding output devices respectively. The whole process does not require manual intervention, realizing the integrated automated operation of detection, diversion and rejection. The diversion path is reliable and will not cause impact damage to the bag.

[0018] 3. By installing a suction component inside the two-section conveyor belt, the valve bag is stably adsorbed onto the belt surface during conveying and inspection, ensuring its positional stability under high-speed conveying conditions. Especially when using a lower light source to inspect the bottom of the bag through the gap between the front and rear conveyor belts, it effectively prevents the bag from drifting or tilting, further ensuring the clarity of double-sided image acquisition and the accuracy of inspection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the visual inspection device of this utility model;

[0021] Figure 3 This is a schematic diagram of the waste removal device of this utility model;

[0022] Figure 4 This is a schematic diagram of the valve bag structure of this utility model.

[0023] In the diagram: 1. Frame; 2. Conveying device; 20. Conveying channel; 21. Front conveyor belt; 22. Rear conveyor belt; 23. Suction box; 24. Air vent; 3. Vision inspection device; 31. Camera; 32. Upper lighting source; 33. Lower lighting source; 4. Good product output device; 5. Scrap product output device; 6. Scrap rejection device; 61. Rotating frame; 62. Rotating power source; 621. Rotating motor; 622. Rotating main shaft; 623. Rotating support arm; 624. Rotating bushing; 63. Rotating bearing surface; 64. Winding roller; 65. Guide roller; 7. Valve pocket; 71. Valve port fold; 72. Labeling strip. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. Example

[0025] like Figures 1 to 4 The valve bag visual inspection rejection mechanism shown includes a frame 1, which serves as an integral support structure and is equipped with a conveying device 2, a visual inspection device 3, a good product output device 4, a waste product output device 5, and a waste rejection device 6.

[0026] The function of the conveying device 2 is to receive and transport the valve bag 7 to be tested. In this embodiment, the conveying device 2 is preferably composed of a front conveyor belt 21 and a rear conveyor belt 22 arranged in series. The upper surfaces of the front conveyor belt 21 and the rear conveyor belt 22 together form the conveying channel 20 for transporting the valve bag 7. Both the front conveyor belt 21 and the rear conveyor belt 22 are equipped with suction components. The suction components specifically include suction boxes 23 disposed inside each conveyor belt, and suction devices connected to the suction boxes 23 by pipes. The belt surfaces of the front conveyor belt 21 and the rear conveyor belt 22 are densely covered with air holes 24. When the suction device is activated, negative pressure is transmitted through the suction boxes 23 to the air holes 24 on the belt surface, thereby firmly adsorbing the valve bag 7 onto the surface of the conveyor belt for stable transport and preventing displacement when moving at high speed or passing through the gap between the two belts.

[0027] The visual inspection device 3 is used to collect image information of the valve bag 7 during the conveying process to eliminate blind spots in the detection from a single perspective. The device includes at least two sets of cameras 31 disposed on the upper side of the conveying channel 20, and at least one set of upper illumination source 32 and at least one set of lower illumination source 33 respectively provided for the at least two sets of cameras 31.

[0028] In a preferred embodiment, the visual inspection device 3 includes two sets of cameras 31. An upper illumination source 32 is positioned above the conveyor channel 20, and the corresponding camera 31 is also positioned above the conveyor channel 20 to capture images of the upper surface of the valve bag illuminated by the upper light source. Specifically, the upper illumination source 32 is tilted above the conveyor channel 20, its illumination area covering the input end of the rear conveyor belt 22. The imaging area of ​​the corresponding camera 31 also covers the input end of the rear conveyor belt 22, used to capture images of the sticker 72 on the valve bag 7 illuminated by the tilted light source. A qualified sticker 72 is flatly affixed to the surface of the valve port folded edge 71. A lower illumination source 33 is positioned below the conveyor channel 20, and the corresponding camera 31 is positioned above the conveyor channel 20. Specifically, there is a gap between the front conveyor belt 21 and the rear conveyor belt 22. The lower lighting source 33 is set within this gap, and a matching camera 31 is positioned above the gap on the conveyor device 2 to capture images of the light source 33 shining through the valve bag 7 onto the valve opening folded edge 71. A qualified valve bag 7 has two valve opening folded edges 71 that overlap flatly. The two sets of cameras 31 work together to achieve comprehensive inspection of the appearance, dimensions, and sealing quality of the valve bag 7.

[0029] The rejection device 6 is located after the output end of the rear conveyor belt 22 in the conveying device 2. It is used to receive the valve bag 7 after inspection and change its conveying path according to the inspection results. Specifically, after the image is acquired and processed by the vision inspection device 3, the rejection device 6 rejects the defective products. The rejection device 6 includes a rotating frame 61 and a rotational power source 62 that drives the rotating frame 61 to swing around a horizontal axis near one end of the conveying device 2. The rotating frame 61 is provided with a rotating receiving surface 63 for conveying the valve bag 7.

[0030] Specifically, the waste rejection device 6 also includes a winding roller 64, and the rotating frame 61 is rotatably connected to the frame 1 via the winding roller 64. The winding roller 64 is located at the end of the rotating frame 61 closest to the conveying device 2. A guide roller 65 is provided at the end of the rotating frame 61 furthest from the conveying device 2. Depending on the actual conveying distance requirements, the rotating bearing surface 63 can be a rotating belt wound around the winding roller 64 and the guide roller 65, or it can be a platform directly set on the rotating frame 61. When a rotating belt is used, the winding roller 64 is driven to rotate, which drives the rotating belt to transport the valve bag 7. When the conveying distance is small, a smooth platform fixed on the rotating frame 61 can be used directly as the rotating bearing surface 63, and the valve bag 7 slides over the platform by the inertial force given by the upstream conveying device 2.

[0031] The rotational power source 62 drives the entire rotating frame 61 to oscillate around the axis of the roller 64, thereby enabling the switching of the output end of the rotating receiving surface 63 between the good product output device 4 and the waste product output device 5. This embodiment provides two optional rotational power source 62 schemes:

[0032] Option 1: The power source 62 is a cylinder. The cylinder body is hinged to the frame 1, and the end of its piston rod is hinged to the side frame of the rotating frame 61. By controlling the extension and retraction of the cylinder piston rod, the rotating frame 61 can be pushed or pulled to swing up and down around the axis of the roller 64.

[0033] Option 2: The rotational power source 62 includes a rotational motor 621, a rotational main shaft 622, and a rotational support arm 623. The rotational motor 621 is fixedly mounted on the frame 1, and its output shaft is connected to the rotational main shaft 622 to drive the rotation of the main shaft 622. One end of the rotational support arm 623 is hinged to the rotating frame 61, and a rotational bushing 624 is fixed in the shaft hole at the other end. The rotational bushing 624 is eccentrically fitted onto the rotational main shaft 622. This constitutes an eccentric linkage mechanism. When the rotational motor 621 drives the rotational main shaft 622 to rotate, the rotational motion is converted into the reciprocating oscillation of the rotating frame 61 through the eccentric rotational bushing 624 and the rotational support arm 623.

[0034] The good product output device 4 and the waste product output device 5 are located behind the waste rejection device 6 and are used to connect with and convey the diverted valve bag 7 outwards. In this embodiment, the waste product output device 5 is located above the good product output device 4.

[0035] The working process of this organization is as follows:

[0036] First, the valve bag 7 to be tested enters the front conveyor belt 21 and is stably adsorbed and transported forward under the suction force generated by the suction component. When the bag passes through the gap between the front conveyor belt 21 and the rear conveyor belt 22, the lower illumination source 33 located at the gap illuminates the bottom surface of the bag from below, and the camera 31 located on the upper side of the conveyor device 2 and directly facing the gap captures an image of the lower surface of the bag through the gap. The bag continues to advance to the input end of the rear conveyor belt 22, and the upper illumination source 32, which is tilted above this area, illuminates the upper surface, sides, and opening of the bag, while the corresponding camera 31 simultaneously captures images of the upper surface and opening of the bag. The control system processes and analyzes the images captured by the two sets of cameras 31 to determine whether the valve bag 7 is a good product or a defective product.

[0037] If the product is determined to be genuine, the rotating power source 62 drives the rotating frame 61 to remain in the first swing position. At this time, the input end of the rotating receiving surface 63 smoothly connects with the output end of the rear conveyor belt 22, and the output end of the rotating receiving surface 63 connects with the genuine product output device 4, and the genuine product bag is smoothly delivered.

[0038] If the product is determined to be defective, the control system sends a signal to the rotation power source 62 to drive the rotating frame 61 to swing to the second swing position. At this time, the input end of the rotating receiving surface 63 is still connected to the output end of the rear conveyor belt 22, while its output end is aligned with the defective product output device 5 located above the good product output device 4. The defective bag is then sent into the defective product output channel for rejection.

Claims

1. A valve port bag visual inspection and rejection mechanism, comprising a rack (1), the rack (1) is provided with a conveying device (2), a visual inspection device (3), a genuine product output device (4), a waste product output device (5) and a rejection device (6), the conveying device (2) has a conveying channel (20) for conveying valve port bags (7), characterized in that: The visual inspection device (3) includes at least two sets of cameras (31) disposed on the upper side of the conveying channel (20), and at least one set of upper lighting source (32) and at least one set of lower lighting source (33) respectively provided for the at least two sets of cameras (31); the upper lighting source (32) is disposed on the upper side of the conveying channel (20), and the camera (31) is disposed on the upper side of the conveying channel (20) to capture images of the strip (72) of the valve bag (7) illuminated by the upper light source; the lower lighting source (33) is disposed on the lower side of the conveying channel (20), and the camera (31) is disposed on the upper side of the conveying channel (20) to capture images of the valve opening fold (71) overlap of the valve bag (7) illuminated by the lower light source through the valve bag (7); after the visual inspection device (3) performs graphic acquisition and calculation, the waste rejection device (6) rejects the waste.

2. The valve pocket vision inspection rejection mechanism of claim 1, wherein: The rejection device (6) is located after the output end of the conveying device (2), and includes a rotating frame (61) and a rotational power source (62) for driving the rotating frame (61) to swing about a horizontal axis near one end of the conveying device (2). The rotating frame (61) is provided with a rotating receiving surface (63) for conveying valve bags. The rotating frame (61) has a first swing position and a second swing position. In the first swing position, the input end of the rotating receiving surface (63) is connected to the output end of the conveying device (2), and the output end is connected to the good product output device (4), conveying the valve bag to the good product output device (4). In the second swing position, the input end of the rotating receiving surface (63) is connected to the output end of the conveying device (2), and the output end is connected to the waste product output device (5), conveying the valve bag to the waste product output device (5).

3. The valve pocket visual inspection rejection mechanism according to claim 2, characterized in that: The waste removal device (6) also includes a winding roller (64). The rotating frame (61) is rotatably connected to the frame (1) through the winding roller (64). The winding roller (64) is located at one end of the rotating frame (61) near the conveying device (2). The rotating frame (61) away from the conveying device (2) is provided with a guide roller (65). The rotating bearing surface (63) is a rotating belt wound around the winding roller (64) and the guide roller (65) or a platform set on the rotating frame (61).

4. The valve pocket visual inspection rejection mechanism according to claim 3, characterized in that: The rotational power source (62) is a cylinder, the cylinder body of which is hinged to the frame (1), and the piston rod of which is hinged to the rotating frame (61).

5. The valve pocket visual inspection rejection mechanism according to claim 3, characterized in that: The rotational power source (62) includes a rotational motor (621), a rotational main shaft (622), and a rotational support arm (623). The rotational motor (621) is mounted on the frame (1) and its output end is connected to the rotational main shaft (622) for transmission. One end of the rotational support arm (623) is hinged to the rotating frame (61), and the other end is provided with a rotational bushing (624). The rotational bushing (624) is eccentrically connected to the rotational main shaft (622).

6. The valve pocket visual inspection rejection mechanism according to claim 1, characterized in that: The conveying device (2) includes a front conveyor belt (21) and a rear conveyor belt (22) arranged in series. The upper surfaces of the front conveyor belt (21) and the rear conveyor belt (22) together form the conveying channel (20) of the conveying valve pocket (7). The front conveyor belt (21) and the rear conveyor belt (22) are both equipped with suction components.

7. The valve pocket visual inspection rejection mechanism according to claim 6, characterized in that: There is a gap between the front conveyor belt (21) and the rear conveyor belt (22), and the lower lighting source (33) is disposed in the gap. The camera (31) matched with the lower lighting source (33) is disposed on the upper side of the conveying device (2) facing the gap, so as to capture an image of the lower surface of the valve bag illuminated by the lower lighting source (33) through the gap.

8. The valve pocket visual inspection rejection mechanism according to claim 6, characterized in that: The upper lighting source (32) is obliquely positioned on the upper side of the rear conveyor belt (22), and its lighting area covers the input end of the rear conveyor belt (22). The shooting area of ​​the camera (31) matched with the upper lighting source (32) covers the input end of the rear conveyor belt (22) to capture images of the upper surface of the valve bag and the bag opening illuminated by the oblique upper lighting source (32).

9. The valve pocket visual inspection rejection mechanism according to claim 6, characterized in that: The suction assembly includes a suction box (23) disposed inside the front conveyor belt (21) and the rear conveyor belt (22) and a suction device communicating with the suction box (23). Air holes (24) are evenly distributed on the belt surfaces of the front conveyor belt (21) and the rear conveyor belt (22).

Images