A visual-based appearance detection mechanism for PU valve rubber gaskets

Abstract

The application relates to the technical field of rubber ring appearance detection, and provides a PU valve rubber ring appearance detection mechanism based on vision, which comprises a first conveying belt and a second conveying belt; a detection seat is mounted on one side of the first conveying belt, an industrial vision detection assembly is arranged at the top end in the detection seat, the bottom end of the first conveying belt is provided with the second conveying belt, a turnover arc-shaped plate is arranged on one side of the detection seat, and a cleaning structure is arranged at the top end of the first conveying belt and the second conveying belt. The PU valve rubber ring surface is contacted by the bristles outside the conductive brush roller, static electricity on the PU valve rubber ring surface is conducted and carried, contact type elimination of the static electricity is realized, the conductive brush roller is contacted with the PU valve rubber ring surface, the bristles of the conductive brush roller are contacted with the ring surface and relatively move, surface dust and impurities can be stably carried away, the cleaning work of the surface dust and impurities of the PU valve rubber ring is completed, and the misjudgment caused by the dust and impurities is prevented.

Description

Technical Field

[0001] This invention relates to the field of rubber gasket appearance inspection technology, and in particular to a vision-based PU valve rubber gasket appearance inspection mechanism. Background Technology

[0002] PU valve rubber gaskets are valve sealing elements made of polyurethane material, combining the elasticity of rubber with the wear resistance of plastic. They are important sealing components in industrial valves, used to prevent media leakage, buffer vibration, and protect the sealing surface. After the production of PU valve rubber gaskets is completed, their appearance needs to be inspected. When conducting visual inspection, a visual inspection agency is generally used to perform the inspection. During the inspection process, due to static electricity during the transportation or transfer of PU valve rubber gaskets, dust particles and fibrous impurities can easily adhere to the surface. Dust particles and fibrous impurities are identified by algorithms as pits, pinholes, and scratches, while powdery impurities are identified as bubbles and material spots. This causes qualified gaskets to be misjudged as defective products, increasing rework and re-inspection costs. Therefore, a vision-based PU valve rubber gasket visual inspection agency is needed to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a vision-based appearance inspection mechanism for PU valve rubber gaskets, which solves the problem that existing vision-based appearance inspection mechanisms for PU valve rubber gaskets are inconvenient to clean dust and fiber impurities on the surface of PU valve rubber gaskets during inspection, resulting in defects in the inspection data.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a vision-based PU valve rubber gasket appearance inspection mechanism, comprising a first conveyor belt and a second conveyor belt; A detection seat is installed on one side of the first conveyor belt, and an industrial vision inspection component is provided at the top of the inside of the detection seat. A second conveyor belt is provided at the bottom of the first conveyor belt. A flipping arc plate is provided on one side of the detection seat. A collection box is provided at the bottom of one side of the second conveyor belt. A cleaning structure is provided at the top of the first and second conveyor belts. The cleaning structure includes an adjusting frame, which is installed at the top of the first conveyor belt and the second conveyor belt. A fixed frame is installed at the bottom of the adjusting frame. A conductive brush roller is installed on one side inside the fixed frame, and a collection trough is installed on the other side inside the fixed frame. A scraper is installed on one side of the collection trough, and an installation sleeve is installed at the top of the collection trough. A reciprocating screw is installed inside the installation sleeve, and a thread sleeve is installed on the outside of the reciprocating screw.

[0005] Preferably, a cleaning cotton is installed at the bottom of the threaded sleeve, a connecting plate is installed on one side of the threaded sleeve, a hollow shaft is installed at the top of the connecting plate, a push plate is installed at the bottom of the hollow shaft, an air jet hole is installed on one side of the push plate, a first ratchet is installed at the top of the outer side of the hollow shaft, a second ratchet is installed at the bottom of the first ratchet, a connector is installed at the top of the hollow shaft, and an air pipe is rotatably and sealingly connected to the top of the connector.

[0006] Preferably, the jet holes are provided in multiple sets, and the multiple sets of jet holes are arranged at equal intervals on one side of the push plate.

[0007] Preferably, racks are installed at both ends of one side of the fixing frame, and the two sets of racks are distributed vertically and horizontally at both ends of one side of the fixing frame.

[0008] Preferably, a main synchronous pulley is installed on one side of the fixed frame, one end of the conductive brush roller is connected to the main synchronous pulley, a conductive wire is installed on the other side of the conductive brush roller, a synchronous belt is installed on the outer side of the main synchronous pulley, a driven synchronous pulley is installed on the other end of the synchronous belt, and one end of the driven synchronous pulley is connected to one end of the reciprocating lead screw.

[0009] Preferably, a disc is mounted on one side of the main synchronous pulley, a miniature cylinder is mounted on one side of the disc, one side of the miniature cylinder is fixed to one side of the fixed frame, a piston is installed inside the miniature cylinder, a connecting frame is hinged to one side of the piston, one end of the connecting frame is hinged to one side of the disc, and an air pipe is mounted on one side of the miniature cylinder.

[0010] Preferably, the threaded sleeve is fitted onto the outside of the reciprocating lead screw, and the threaded sleeve and the reciprocating lead screw form a threaded connection.

[0011] Preferably, the outer side of the conductive brush roller is provided with a plurality of bristles, and the plurality of bristles are in contact with one side of the scraper.

[0012] Preferably, a guide groove is provided on one side of the mounting sleeve, and the connecting plate passes through the interior of the guide groove, forming a guide connection between the connecting plate and the guide groove.

[0013] Preferably, the collection trough has discharge ports at both ends, and a collection box is installed at the bottom of the discharge port. There are two sets of collection boxes, which are symmetrically distributed on both sides of the bottom of the collection trough.

[0014] The present invention provides a vision-based appearance inspection mechanism for PU valve rubber gaskets, which has the following advantages: By incorporating a cleaning structure, during the visual inspection of PU valve rubber gaskets, the bristles on the outer side of the conductive brush roller contact the surface of the PU valve rubber gasket, conducting and carrying away the static electricity on the surface of the PU valve rubber gasket, thus achieving contact-based elimination of static electricity. After the static electricity on the surface of the PU valve rubber gasket is eliminated, the contact between the conductive brush roller and the surface of the PU valve rubber gasket, through relative movement, can stably carry away surface dust and impurities. The core is that after the static adsorption force disappears, the dust only retains a very weak physical adhesion force. The bristles achieve the peeling and capture of dust through mechanical action, and the captured dust is directionally carried away with the rotation of the brush roller, thereby completing the cleaning of dust and impurities on the surface of the PU valve rubber gasket. This ensures that the PU valve rubber gasket will not be affected by dust and impurities in subsequent inspections, preventing misjudgments due to dust and impurities. Furthermore, as the PU valve rubber gasket moves, the friction between it and the conductive brush roller will cause the conductive brush roller to rotate synchronously. During the rotation of the conductive brush roller, it comes into contact with the scraper. Through the scraper and the brush bristles of the conductive brush roller, the dust and impurities attached to the brush bristles are scraped off, and the dust falls onto the surface of the scraper, thus completing the cleaning and collection of dust. Furthermore, the scraper's working surface is inclined, which can guide the scraped dust, allowing it to smoothly slide down the inclined surface into the collection tank. Furthermore, during the rotation of the conductive brush roller, the main synchronous wheel will rotate, which will indirectly drive the reciprocating screw to rotate. Through the cooperation of the reciprocating screw and the screw sleeve, the connecting plate will move to one side. The first ratchet will mesh with the teeth of the rack on one side, so that the first ratchet drives the push plate to rotate through the hollow shaft. The push plate will rotate more than half a turn, so that the tilt angle of the push plate is opposite to the initial angle. During the rotation, the dust and impurities attached to one side of the push plate will be thrown into the collection tank in a centrifugal manner, thereby ensuring that the push plate continuously and efficiently cleans the dust on the surface of the scraper. Furthermore, during the rotation of the main synchronous pulley, the disc will rotate. During the rotation of the disc, the piston will move back and forth inside the micro cylinder through the connecting frame, thus achieving a continuous exhaust effect. The gas inside the air pipe will be discharged into the push plate and discharged through the jet hole. The angle of the jet hole is inclined from top to bottom, and the airflow intensity is gentle. When cleaning dust, it can press the dust and impurities onto the scraper surface, effectively preventing dust from scattering. This achieves a dual dust cleaning structure with mechanical pushing and scraping as the main method and airflow blowing as the auxiliary method, while the push plate mechanically pushes and cleans the dust. This improves the dust cleaning effect. Furthermore, by setting up a flipping arc plate, the PU valve rubber gasket is automatically flipped during movement, and the second side is inspected on the second conveyor belt. This enables full-surface defect inspection of both the front and back sealing surfaces of the gasket, eliminating the problem of missed inspections in single-sided inspections. It ensures that both sides meet the requirements of valve sealing for flatness and no defects. Moreover, the automatic flipping design is adapted to industrial continuous production, achieving seamless integration of double-sided inspection with the production rhythm. This ensures the sealing performance of the entire valve machine from the inspection end, and finally completes the visual inspection of the appearance of the PU valve rubber gasket. Attached Figure Description

[0015] Figure 1 This is a frontal three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention viewed from below; Figure 3 This is a three-dimensional structural schematic diagram of the cleaning structure of the present invention, viewed from the front cross-section. Figure 4 This is a three-dimensional structural schematic diagram of the cleaning structure of the present invention, viewed from the side. Figure 5 This is a top-view cross-sectional three-dimensional structural diagram of the cleaning structure of the present invention; Figure 6 for Figure 5 A magnified three-dimensional structural diagram of a portion of point A in the middle; Figure 7 This is a frontal three-dimensional structural diagram of the scraper of the present invention; Figure 8 for Figure 7 A magnified three-dimensional structural diagram of a portion of point B in the middle section; Figure 9 This is a frontal three-dimensional structural diagram of the mounting sleeve of the present invention; Figure 10 This is a three-dimensional structural diagram of the mounting sleeve of the present invention, viewed from below. Figure 11 This is a frontal three-dimensional structural diagram of the push plate of the present invention; Figure 12 This is a frontal exploded three-dimensional structural diagram of the ratchet of the present invention; Figure 13 This is a three-dimensional structural diagram of the ratchet tooth of the present invention, viewed from below. Figure 14 This is a schematic diagram of the exploded three-dimensional structure of the pusher plate of the present invention.

[0016] The reference numerals in the diagram are as follows: 1. First conveyor belt; 2. Cleaning structure; 201. Adjusting frame; 202. Fixing frame; 203. Air pipe; 204. Rack; 205. Conductive brush roller; 206. Scraper; 207. Collection trough; 208. Collection box; 209. Waste discharge port; 2010. Mounting sleeve; 2011. Connecting plate; 2012. Synchronous belt; 2013. Puller pulley; 2014. Miniature cylinder; 20 15. Disc; 2016. Main synchronous pulley; 2017. Connector; 2018. Push plate; 2019. Hollow shaft; 2020. First ratchet; 2021. Second ratchet; 2022. Air jet; 2023. Reciprocating lead screw; 2024. Sleeve; 2025. Cleaning cotton; 2026. Piston; 3. Detection seat; 4. Industrial vision inspection component; 5. Tilting arc plate; 6. Second conveyor belt; 7. Collection box. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-14 The present invention provides a vision-based appearance inspection mechanism for PU valve rubber gaskets, comprising a first conveyor belt 1 and a second conveyor belt 6; an inspection seat 3 is installed on one side of the first conveyor belt 1, an industrial vision inspection component 4 is provided at the top of the inspection seat 3, the second conveyor belt 6 is provided at the bottom of the first conveyor belt 1, a flipping arc plate 5 is provided on one side of the inspection seat 3, a collection box 7 is provided at the bottom of one side of the second conveyor belt 6, and a cleaning structure 2 is provided at the top of the first conveyor belt 1 and the second conveyor belt 6.

[0019] Reference Figures 1-14 As shown, the cleaning structure 2 includes an adjusting frame 201, which is installed at the top of the first conveyor belt 1 and the second conveyor belt 6. A fixing frame 202 is installed at the bottom of the adjusting frame 201. A conductive brush roller 205 is installed on one side inside the fixing frame 202, and a collection trough 207 is installed on the other side inside the fixing frame 202. A scraper 206 is installed on one side of the collection trough 207. An installation sleeve 2010 is installed at the top of the collection trough 207. A reciprocating screw 2023 is installed inside the installation sleeve 2010, and a thread sleeve 2024 is installed on the outside of the reciprocating screw 2023. A cleaning cotton 2025 is installed at the bottom of the threaded sleeve 2024. A connecting plate 2011 is installed on one side of the threaded sleeve 2024. A hollow shaft 2019 is installed at the top of the connecting plate 2011. A push plate 2018 is installed at the bottom of the hollow shaft 2019. An air jet hole 2022 is installed on one side of the push plate 2018. A first ratchet 2020 is installed at the top of the outer side of the hollow shaft 2019. A second ratchet 2021 is installed at the bottom of the first ratchet 2020. A connector 2017 is installed at the top of the hollow shaft 2019. An air pipe 203 is rotatably sealed at the top of the connector 2017. Multiple sets of jet nozzles 2022 are arranged at equal intervals on one side of the push plate 2018. Two sets of racks 204 are installed at both ends of one side of the fixed frame 202, with the racks 204 distributed vertically and horizontally at both ends of one side of the fixed frame 202. A main synchronous pulley 2016 is installed on one side of the fixed frame 202. One end of the conductive brush roller 205 is connected to the main synchronous pulley 2016, and a conductive wire is installed on the other side of the conductive brush roller 205. A synchronous belt 2012 is installed on the outside of the main synchronous pulley 2016, and a driven synchronous pulley 2013 is installed at the other end of the synchronous belt 2012. One end of the driven synchronous pulley 2013 is connected to one end of the reciprocating screw 2023. A disc 2015 is installed on one side of the main synchronous pulley 2016, and a miniature cylinder 2014 is installed on one side of the disc 2015. One side of the miniature cylinder 2014 is fixed to one side of the fixed frame 202. The micro cylinder 2014 contains a piston 2026, with a connecting frame hinged to one side of the piston 2026. One end of the connecting frame is hinged to one side of the disc 2015. An air pipe 203 is installed on one side of the micro cylinder 2014. A threaded sleeve 2024 is fitted onto the outside of the reciprocating screw 2023, forming a threaded connection between the threaded sleeve 2024 and the reciprocating screw 2023. Several bristles are provided on the outside of the conductive brush roller 205, and several bristles are in contact with one side of the scraper 206. A guide groove is provided on one side of the mounting sleeve 2010, and a connecting plate 2011 penetrates the interior of the guide groove, forming a guide connection between the connecting plate 2011 and the guide groove. The collection tank 207 has discharge ports 209 at both ends, and a collection box 208 is installed at the bottom of the discharge port 209. Two sets of collection boxes 208 are provided, and the two sets of collection boxes 208 are symmetrically distributed on both sides of the bottom of the collection tank 207.

[0020] During the appearance inspection of PU valve rubber gaskets, the PU valve rubber gaskets are sequentially placed at the top of the first conveyor belt 1 for conveying. Before the appearance inspection, the handle at the top of the adjusting frame 201 is rotated according to the thickness of the PU valve rubber gasket to adjust the height of the fixing frame 202, so that the outer side of the conductive brush roller 205 inside the fixing frame 202 contacts the surface of the PU valve rubber gasket. When the PU valve rubber gasket moves to the bottom of the conductive brush roller 205, the bristles on the outer side of the conductive brush roller 205 contact the surface of the PU valve rubber gasket, carrying the static electricity on the surface of the PU valve rubber gasket through the conductive path of the brush roller itself to the interior of the conductive wire on one side. One end of the conductive wire is connected to the grounding wire. The connection conducts static electricity away, thus achieving contact-based elimination of static electricity. After the static electricity on the surface of the PU valve rubber gasket is eliminated, as the conductive brush roller 205 comes into contact with the surface of the PU valve rubber gasket, the bristles of the conductive brush roller 205 contact the gasket surface and generate relative movement, which can stably carry away the surface dust and impurities. The core is that after the electrostatic adsorption force disappears, the dust only has a very weak physical adhesion force. The bristles achieve the peeling and capture of dust through mechanical action, and the dust is directionally carried away as the brush roller rotates after being captured, thereby completing the cleaning of dust and impurities on the surface of the PU valve rubber gasket. This ensures that the PU valve rubber gasket will not be affected by dust and impurities in subsequent testing, preventing misjudgments due to dust and impurities. When the conductive brush roller 205 cleans dust and impurities from the surface of the PU valve rubber gasket, the friction between the PU valve rubber gasket and the conductive brush roller 205 causes the conductive brush roller 205 to rotate synchronously. During the rotation, the conductive brush roller 205 comes into contact with the scraper 206. Through the scraper 206's contact with the bristles of the conductive brush roller 205, the dust and impurities attached to the bristles are scraped off, causing the dust to fall onto the surface of the scraper 206. The scraper 206's working surface is inclined, which can directionally guide the scraped dust, allowing the dust to slide smoothly along the inclined surface into the collection tank 207. During the rotation of the conductive brush roller 205, the conductive brush roller 205 will... The main synchronous pulley 2016 rotates, which in turn drives the driven synchronous pulley 2013 to rotate via the synchronous belt 2012. The driven synchronous pulley 2013, in turn, drives the reciprocating screw 2023 to rotate. The reciprocating screw 2023, through its interaction with the threaded sleeve 2024, causes the connecting plate 2011 to move to one side. This movement of the connecting plate 2011 also causes the push plate 2018 to move to one side. Because the push plate 2018 is tilted to one side, it moves along the inclined surface of the scraper 206, effectively pushing and cleaning dust and impurities. When the push plate 2018 moves to one side of the rack 20... At position 4, the first ratchet 2020 engages with the teeth of the rack 204 on one side, causing the first ratchet 2020 to drive the push plate 2018 to rotate via the hollow shaft 2019. This causes the push plate 2018 to rotate approximately half a turn, tilting at an angle opposite to its initial angle. During rotation, the push plate 2018 centrifugally throws dust and impurities adhering to one side into the collection tank 207, ensuring continuous and efficient cleaning of the dust surface of the scraper 206. The first ratchet 2020 drives the push plate 2018 to rotate as the rack 204 moves. When the first ratchet 2020 moves back on the surface of the rack 204, it idles. When the push plate 2018 moves to the rack 204 on the other side, the heights of the two sets of racks 204 correspond to the first ratchet 2020 and the second ratchet 2021 respectively. At this time, the second ratchet 2021 will mesh with the rack 204 on the other side, causing the push plate 2018 to rotate again to clean and change direction. Its working principle is the same as the first rotation, thereby completing the reciprocating cleaning work of the dust on the surface of the scraper 206, making it more effective in cleaning dust. When the thread sleeve 2024 moves back and forth, it will also drive the cleaning cotton 2025 to move inside the collection groove 207, thereby pushing the dust that falls into the collection groove 207 into the collection box 208 at the bottom of the discharge port 209, completing the cleaning and collection work of dust. During rotation, the main synchronous pulley 2016 drives the disc 2015 to rotate. The disc 2015, in turn, drives the piston 2026 to reciprocate inside the micro cylinder 2014 via the connecting bracket. During exhaust, the top one-way valve closes, while the one-way valve on one side opens, allowing gas to be discharged into the air pipe 203. During intake, the opening and closing of the two one-way valves are reversed, thus achieving continuous exhaust. The gas inside the air pipe 203 is discharged into the push plate 2018 and exits through the jet nozzle 2022, which is angled downwards. The angled design and gentle airflow allow dust and impurities to adhere to the surface of the scraper 206 during dust removal, effectively preventing dust from scattering. This enables the pusher 2018 to simultaneously push and blow air while cleaning dust, forming a dual dust removal structure with mechanical pushing and scraping as the main method and airflow blowing as a supplement. This prevents problems such as fine dust residue, dust accumulation in dead corners, dust rebound, and accumulation that can easily occur when purely pushing dust and impurities. At the same time, it reduces pushing resistance and improves dust removal efficiency, allowing dust to be quickly and directionally pushed into the collection tank 207, improving the dust removal effect and thus completing the dust removal work. After the PU valve rubber gaskets are cleaned, they are conveyed to the bottom of the inspection seat 3. The industrial vision inspection component 4 inspects their appearance. Unqualified PU valve rubber gaskets are instantly blown to one side by a nozzle on one side of the inspection seat 3, while qualified PU valve rubber gaskets are conveyed by the conveyor belt inside the inspection seat 3 to the inside of the flipping arc plate 5. Due to the special structure of the flipping arc plate 5, the PU valve rubber gaskets are flipped during movement, allowing them to fall to the top of the second conveyor belt 6 for a second inspection. The flipping arc plate 5 enables automatic flipping of the PU valve rubber gaskets during movement, and the second inspection is completed on the second conveyor belt 6. This achieves full-surface defect inspection of both the front and back sealing surfaces of the gasket, eliminating the problem of missed inspections from single-sided inspections. It ensures that both sides meet the requirements for flatness and defect-free valve sealing. The automatic flipping design is suitable for continuous industrial production, achieving seamless integration of double-sided inspection with the production rhythm. This ensures the sealing performance of the entire valve from the inspection end, ultimately completing the visual inspection of the PU valve rubber gaskets' appearance.

[0021] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vision-based appearance inspection mechanism for PU valve rubber gaskets, comprising a first conveyor belt (1) and a second conveyor belt (6); Its features are: A detection seat (3) is installed on one side of the first conveyor belt (1), and an industrial vision inspection component (4) is provided at the top inside the detection seat (3). A second conveyor belt (6) is provided at the bottom of the first conveyor belt (1). A flipping arc plate (5) is provided on one side of the detection seat (3). A collection box (7) is provided at the bottom of one side of the second conveyor belt (6). A cleaning structure (2) is provided at the top of the first conveyor belt (1) and the second conveyor belt (6). The cleaning structure (2) includes an adjusting frame (201), which is installed at the top of the first conveyor belt (1) and the second conveyor belt (6). A fixing frame (202) is installed at the bottom of the adjusting frame (201). A conductive brush roller (205) is installed on one side inside the fixing frame (202), and a collection trough (207) is installed on the other side inside the fixing frame (202). A scraper (206) is installed on one side of the collection trough (207). An installation sleeve (2010) is installed at the top of the collection trough (207). A reciprocating screw (2023) is installed inside the installation sleeve (2010), and a thread sleeve (2024) is installed on the outside of the reciprocating screw (2023).

2. The vision-based PU valve rubber gasket appearance inspection mechanism according to claim 1, characterized in that: The bottom end of the threaded sleeve (2024) is fitted with a cleaning cotton (2025). A connecting plate (2011) is fitted on one side of the threaded sleeve (2024). A hollow shaft (2019) is fitted on the top end of the connecting plate (2011). A push plate (2018) is fitted on the bottom end of the hollow shaft (2019). An air jet hole (2022) is fitted on one side of the push plate (2018). A first ratchet (2020) is fitted on the top end of the outer side of the hollow shaft (2019). A second ratchet (2021) is fitted on the bottom end of the first ratchet (2020). A connector (2017) is fitted on the top end of the hollow shaft (2019). An air pipe (203) is rotatably and sealingly connected to the top end of the connector (2017).

3. The vision-based PU valve rubber gasket appearance inspection mechanism according to claim 2, characterized in that: The jet holes (2022) are provided in multiple sets, and the multiple sets of jet holes (2022) are arranged at equal intervals on one side of the push plate (2018).

4. The vision-based appearance inspection mechanism for PU valve rubber gaskets according to claim 1, characterized in that: The two ends of one side of the fixed frame (202) are equipped with racks (204), and the two sets of racks (204) are distributed vertically and horizontally at both ends of one side of the fixed frame (202).

5. The vision-based PU valve rubber gasket appearance inspection mechanism according to claim 1, characterized in that: A main synchronous pulley (2016) is installed on one side of the fixed frame (202). One end of the conductive brush roller (205) is connected to the main synchronous pulley (2016). A conductive wire is installed on the other side of the conductive brush roller (205). A synchronous belt (2012) is installed on the outside of the main synchronous pulley (2016). A driven synchronous pulley (2013) is installed on the other end of the synchronous belt (2012). One end of the driven synchronous pulley (2013) is connected to one end of the reciprocating screw (2023).

6. The vision-based PU valve rubber gasket appearance inspection mechanism according to claim 5, characterized in that: A disc (2015) is mounted on one side of the main synchronous pulley (2016), and a miniature cylinder (2014) is mounted on one side of the disc (2015). One side of the miniature cylinder (2014) is fixed to one side of the fixing frame (202). A piston (2026) is installed inside the miniature cylinder (2014). A connecting frame is hinged to one side of the piston (2026), and one end of the connecting frame is hinged to one side of the disc (2015). An air pipe (203) is mounted on one side of the miniature cylinder (2014).

7. The vision-based PU valve rubber gasket appearance inspection mechanism according to claim 1, characterized in that: The threaded sleeve (2024) is sleeved on the outside of the reciprocating lead screw (2023), and the threaded sleeve (2024) and the reciprocating lead screw (2023) form a threaded connection.

8. The vision-based PU valve rubber gasket appearance inspection mechanism according to claim 1, characterized in that: The conductive brush roller (205) has several bristles on its outer side, and several bristles are in contact with one side of the scraper (206).

9. The vision-based appearance inspection mechanism for PU valve rubber gaskets according to claim 2, characterized in that: A guide groove is provided on one side of the mounting sleeve (2010), and the connecting plate (2011) penetrates the interior of the guide groove, forming a guide connection between the connecting plate (2011) and the guide groove.

10. The vision-based PU valve rubber gasket appearance inspection mechanism according to claim 1, characterized in that: The collection trough (207) has discharge ports (209) at both ends. A collection box (208) is installed at the bottom of the discharge port (209). There are two sets of collection boxes (208), and the two sets of collection boxes (208) are symmetrically distributed on both sides of the bottom of the collection trough (207).

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