Automatic valve detection system for valve sealing detection

Abstract

The invention discloses an automatic valve detection system for valve sealing detection, and the system comprises an input unit which is used for receiving and conveying a to-be-detected valve; the detection unit is used for receiving the to-be-detected valve conveyed by the input unit and carrying out sealing detection on the to-be-detected valve; the classification unit is used for classifying the detected valves according to the detection result of the leak detection unit; the output unit is used for receiving the valves classified by the classification unit and conveying the valves to a set position; the automatic valve detection system for valve sealing detection can replace a water body detection method to detect the sealing performance of the valve, the valve is prevented from being eroded, the detection automation degree and the detection efficiency are improved, and the consumption of manual labor is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of valve detection, and in particular to an automatic valve detection system for valve sealing detection. Background Art

[0002] A valve is a device used to control the direction, pressure, and flow of a fluid in a fluid system. It is a device that allows the medium (liquid, gas, powder) in piping and equipment to flow or stop and control its flow. Valve products need to undergo a series of performance tests before leaving the factory to detect whether the product meets the design requirements and whether it meets the quality standards prescribed by the state, including the test of the valve's sealing performance. The valve can only be shipped out of the factory after meeting the sealing test requirements.

[0003] In the prior art, water body detection method is mostly used to detect the sealing of valves, but the detection time of the water body detection method is relatively long, and the valve body and other parts will be corroded during the detection process. When the valve leaks, the water body detection method cannot accurately find the leakage location; on a valve production line with a large production volume, the workload of valve sealing detection is large, and the existing valve detection automation is low, the overall detection and transportation efficiency is low, and the human labor consumption is large.

[0004] Therefore, it is urgent to develop a valve sealing detection system that can replace the water body detection method to detect the sealing of the valve, avoid valve erosion, improve the degree of automation and detection efficiency, and reduce the consumption of manual labor. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a valve automatic detection system for valve sealing detection, which can replace the water body detection method to detect the sealing of the valve, avoid valve erosion, improve the degree of automation and detection efficiency, and reduce the consumption of manual labor.

[0006] The valve automatic detection system for valve sealing detection of the present invention comprises:

[0007] An input unit, used for receiving and delivering the valve to be inspected;

[0008] A detection unit, used for receiving the valve to be detected delivered by the input unit to perform a sealing detection;

[0009] A classification unit, which classifies the tested valves according to the test results of the leak detection unit;

[0010] The output unit is used to receive the valves classified by the classification unit and transport them to the set positions.

[0011] Furthermore, the detection unit includes a fixing mechanism and a detection component, the fixing mechanism includes a symmetrically arranged mounting base, and the mounting base is respectively provided with a positioning block I and a positioning block II, the positioning block I and the positioning block II are telescopically mounted on the mounting base, and the positioning block I and the positioning block II are in a truncated cone shape.

[0012] Furthermore, the detection component includes a positioning sensor for positioning the valve port of the valve to be detected, and a pressure sensor I and a pressure sensor II for detecting the intracavity pressure on both sides of the valve. The positioning sensor and pressure sensor I are arranged on the positioning block I, and the pressure sensor II is arranged on the positioning block II.

[0013] Furthermore, the detection component also includes a compressed air pump and a thermal infrared image sensor. A pressure test air passage is opened inside the positioning block I. The compressed air pump is connected to the pressure test air passage through an air pipe, and the thermal infrared image sensor is arranged on the positioning block II. The compressed air pump is used to supply air to the chamber on the valve port side blocked by the positioning block I and reach the set detection pressure. When the valve leaks, the compressed air pump heats the supplied gas and detects the leakage position through the thermal infrared image sensor.

[0014] Furthermore, the input unit includes a liftable baffle I and an infrared sensor I arranged at the end. When the valve to be detected passes through the end of the input unit, the infrared sensor I controls the baffle I to rise.

[0015] Furthermore, the detection unit also includes a detection platform and a liftable crawler symmetrically arranged on both sides of the detection platform, the liftable crawler has a minimum height and a maximum height, and when the liftable crawler is at the maximum height, it is used to receive the valve to be detected transmitted by the input unit, and when the valve to be detected is detected, the liftable crawler is at the minimum height and is located in the same plane as the detection platform; the detection platform is provided with a liftable baffle II, and the baffle II is used to intercept the valve to be detected and limit the valve to be detected in the transmission direction together with the baffle I.

[0016] Furthermore, the classification unit includes a drivable rotating table and a transmission track, wherein the transmission track is used to receive the valves detected by the detection unit, and the transmission track is located at the maximum height of the liftable track. A liftable baffle III is provided on the rotating table, and the baffle III is used to intercept leaking valves, and a collision sensor is provided inside the baffle III.

[0017] Furthermore, the collision sensor is used to control the start and stop of the rotating table. When the baffle III intercepts a leaking valve, the collision sensor detects the collision between the leaking valve and the baffle III, and controls the rotating table to rotate to receive the output conveyor belt of the leaking valve.

[0018] Furthermore, an infrared sensor II is provided between the detection unit and the classification unit. When the detection unit transports the detected valve to the classification unit, the infrared sensor II is used to detect the detected valve. When the detected valve is detected to pass, the infrared sensor II controls the baffle I to descend.

[0019] Furthermore, it also includes a valve fixing assembly, which includes a fixed base plate, an upper cover plate and a lower cover plate. The fixed base plate is provided with a T-shaped groove, and the lower cover plate can be driven and movably arranged on the T-shaped groove. The upper cover plate and the lower cover plate are used to support and fix the valve ports at both ends of the valve.

[0020] Beneficial effects of the present invention: The valve automatic detection system for valve sealing detection of the present invention can replace the water body detection method to detect the sealing of the valve, avoid valve erosion, improve the degree of automation and detection efficiency, and reduce the consumption of manual labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 The structure of the present invention is schematically shown Figure Ⅰ ;

[0023] Figure 2 The structure of the present invention is schematically shown Figure II ;

[0024] Figure 3 The valve fixing assembly structure of the present invention is schematically shown in FIG. Figure Ⅰ ;

[0025] Figure 4 The valve fixing assembly structure of the present invention is schematically shown in FIG. Figure II ;

[0026] Figure 5 The valve fixing assembly structure of the present invention is schematically shown in FIG. Figure III .

[0027] Numbers in the figure: 1. Input conveyor belt; 2. Mounting base; 3. Positioning block I; 4. Positioning block II; 5. Cylindrical rod; 6. Workbench; 7. Infrared sensor I; 8. Baffle I; 9. Inspection table; 10. Liftable crawler belt; 11. Baffle II; 12. Support column I; 13. Compressed air pump; 14. Mounting groove; 15. Air pipe; 16. Air pipe support groove; 17. Pressure test airway; 18. Rotating round table; 19. Transmission crawler belt; 20. Baffle III; 21. Transmission roller group; 22. Timing sensor; 23. Defective product output conveyor Belt; 24. Conveyor belt for qualified product output; 25. Infrared sensor II; 26. Pressure leakage alarm sensor; 27. Computer; 28. Fixed bottom plate; 29. ​​Upper cover plate; 30. Lower cover plate; 31. Positioning sensor; 32. Pressure sensor I; 33. Elastic part; 34. Movable pin; 35. Bump; 36. Telescopic cylinder; 37. Support column I; 38. Valve; 39. Transition platform; 40. Tool box; 41. Flexible rubber pad; 42. Hard rubber pad; 43. Pressure sensor II; 44. Thermal infrared image sensor. DETAILED DESCRIPTION

[0028] Figure 1 The structure of the present invention is schematically shown Figure Ⅰ , Figure 2 The structure of the present invention is schematically shown Figure II , Figure 3 The valve fixing assembly structure of the present invention is schematically shown in FIG. Figure Ⅰ , Figure 4 The valve fixing assembly structure of the present invention is schematically shown in FIG. Figure II , Figure 5 The valve fixing assembly structure of the present invention is schematically shown in FIG. Figure III , as shown in the figure: the valve automatic detection system for valve sealing detection of this embodiment includes:

[0029] The input unit is used to receive and transport the valve to be tested. The input unit can generally adopt existing conveying devices such as conveyor belts, crawler belts, rollers, etc., which will not be described in detail here. In this solution, the input conveyor belt 1 is taken as an example.

[0030] The detection unit is used to receive the valve to be tested transmitted by the input unit for sealing detection; sealing detection refers to testing the sealing performance of the valve to ensure that the valve can effectively prevent fluid or gas leakage during use and ensure the safety and reliability of the system. Generally, the detection methods used can be direct pressure detection, ultrasonic detection, halogen detection, etc. This solution adopts the direct pressure detection principle and detects the sealing of the valve through four stages of inflation, pressure stabilization, detection and exhaust. The specific detection steps are detailed in the workflow description below and will not be repeated here.

[0031] The classification unit classifies the tested valves according to the test results of the detection unit; the test results refer to the sealing condition of the valves. During the test process, if the valve does not leak, it is qualified; if the valve leaks, it is unqualified. The classification unit classifies according to two test structures.

[0032] The output unit is used to receive the valves classified by the classification unit and convey them to the set position; the output unit can generally adopt existing conveying devices such as conveyor belts, crawler tracks, rolling rollers, etc., which will not be described in detail here; in this solution, taking the conveyor belt as an example, a defective product output conveyor belt 23 and a qualified product output conveyor belt 24 are respectively provided; the set position refers to the position for storing the valves that have been inspected and classified, generally a storage box is used, etc., which will not be described in detail here.

[0033] In this embodiment, Figure 2 As shown, a workbench 6 is provided for installing the detection unit and the classification unit. A base or the like may also be used, which is not limited here. In this solution, the workbench 6 is taken as an example for description.

[0034] In this embodiment, the detection unit includes a fixing mechanism and a detection assembly, the fixing mechanism includes a symmetrically arranged mounting base 2, the mounting base 2 is provided with a positioning block I3 and a positioning block II4, the positioning block I3 and the positioning block II4 are telescopically mounted on the mounting base 2, and the positioning block I3 and the positioning block II4 are truncated cone-shaped; Figure 2 As shown, the mounting base 2 is arranged on a workbench 6, and the positioning block I3 and the positioning block II4 are telescopically mounted on the mounting base 2. The positioning block I3 is mounted on the mounting base 2 through a telescopic cylindrical rod 5, and the positioning block II is also mounted on the mounting base 2 through a telescopic cylindrical rod 5. The cylindrical rod 5 is detachably mounted on the mounting base 2, which is convenient for subsequent maintenance and replacement; the positioning block I3 and the positioning block II4 are truncated cone-shaped, and the shape design of the truncated cone-shaped positioning block makes it fit the contact surface of the valve port more closely, which can effectively reduce the risk of leakage and improve the sealing performance of the valve. The structure of the truncated cone-shaped positioning block is relatively simple, which reduces The number and complexity of mechanical parts, the frustum-shaped positioning block can also be adjusted according to the size and shape of different valves, that is, the positioning block I3 and the positioning block II4 can be adjusted through the retractable cylindrical rod 5, which is suitable for various types of valve ports, has good versatility and adaptability, simple structure, relatively simple installation and replacement process, and reduces maintenance costs and time; in some working environments with large vibrations, the design of the frustum-shaped positioning block can better maintain the sealing and stability of the valve, reduce loosening or leakage caused by vibration, reduce the hysteresis of the valve during the opening and closing process, and improve the response speed and dynamic performance of the valve; such as Figure 2As shown, in one embodiment of the present application, two layers of rubber pads are bonded and fixed on the outer walls of the positioning block Ⅰ3 and the positioning block Ⅱ4, the first layer is a flexible rubber pad 41, and the second layer is a hard rubber pad 42. The first layer is a flexible rubber pad 41 which is relatively thin and can surround the outer circle of the valve port and can effectively protect the valve port from being scratched. The second layer is a hard rubber pad 42 which has a harder contact seal on the valve port.

[0035] In this embodiment, the detection component includes a positioning sensor 31 for positioning the valve port of the valve to be detected, a pressure sensor I32 and a pressure sensor II for detecting the pressure in the cavity on both sides of the valve. The positioning sensor 31 and the pressure sensor I32 are arranged on the positioning block I3, and the pressure sensor II is arranged on the positioning block II4; the positioning sensor 31 is used to detect the size of the valve port of the valve to be tested. After the size of the valve port is determined, the retractable cylindrical rod 5 is controlled to allow the cylindrical rod 5 to push the positioning block I3 and the positioning block II4 to move toward the center of the valve port to ensure stable and reliable sealing; the pressure sensor I32 and the pressure sensor II are respectively used to detect the pressure in the cavity on both sides of the valve. During the detection process, the valve port sealed by the positioning block I3 is pressurized to a set detection pressure, and the pressure is detected by the pressure sensor I32 and the pressure sensor II and compared with the cavity pressure when the initial seal is fixed to determine whether the valve is leaking. The set detection pressure can be selected according to different valve models, which will not be repeated here.

[0036] In this embodiment, the detection assembly further includes a compressed air pump 13 and a thermal infrared pattern sensor 44. A pressure test airway 17 is opened inside the positioning block I3. The compressed air pump 13 is connected to the pressure test airway 17 through an air pipe 15. The thermal infrared pattern sensor 44 is arranged on the positioning block II4. Figure 1As shown, the compressed air pump 13 is arranged on the workbench 6 through a support column Ⅰ12. The support column Ⅰ12 can be welded on the workbench 6, or other existing mechanical connection methods can be used, which will not be repeated here; the support column is provided with a mounting groove 14 for mounting the compressed air pump 13, one end of the air pipe 15 is connected to the air outlet end of the compressed air pump 13, and the other end of the air pipe 15 is connected to the pressure test airway 17 of the positioning block Ⅰ3. The air pipe 15 is provided with an air pipe support groove 16 in the middle, and the air pipe support groove 16 is used to support the air pipe 15 to avoid interference with other components. The tube support groove 16 is set on the workbench 6 through the support column II. The support column II can be welded on the workbench 6, or other existing mechanical connection methods can be adopted, which will not be repeated here; the support column II and the trachea support groove 16 are connected by a mechanical connection method of a ball hinge. When the positioning block I3 is extended or retracted, the trachea 15 connected to the pressure test airway 17 will move with the extension and retraction of the positioning block I3. The ball hinge can ensure that the trachea 15 can move freely within a certain range following the positioning block I3, and the applicability is stronger; other existing mechanical connection methods can also be adopted between the trachea support groove 16 and the support seat II, which will not be repeated here.

[0037] In this embodiment, the compressed air pump 13 is used to supply air to the chamber on the side of the valve port blocked by the positioning block Ⅰ3 and reach the set detection pressure. When the valve leaks, the compressed air pump 13 heats the supplied gas and detects the leakage position through the thermal infrared image sensor 44; the compressed air pump 13 can be powered by an existing electric motor, and the motor can be installed at the bottom of the workbench 6, which will not be repeated here; when the valve leaks, the compressed air pump 13 heats the supplied gas, and the existing electric heating elements can be used to heat the air, such as heating wires (such as nickel-chromium alloy or iron-chromium-aluminum alloy), PTC ceramic heating plates, etc., which will not be repeated here.

[0038] In this embodiment, the input unit is provided with a liftable baffle plate Ⅰ8 and an infrared sensor Ⅰ7 at the end. When the valve to be detected passes through the end of the input unit, the infrared sensor Ⅰ7 controls the baffle plate Ⅰ8 to rise. Figure 1As shown, the input unit includes a liftable baffle Ⅰ8 and an infrared sensor Ⅰ7 arranged at the end. This scheme takes the conveyor belt as an example. The baffle Ⅰ8 is arranged at the end of the input conveyor belt 1 and the infrared sensor Ⅰ7. When the valve to be detected passes through the end of the input conveyor belt 1, the infrared sensor Ⅰ7 controls the baffle Ⅰ8 to rise. The valve to be detected passes through the end of the input conveyor belt 1, which means that the valve to be detected passes through the end of the input conveyor belt 1 and is transported to the detection unit under the transportation of the input conveyor belt 1. The infrared sensor Ⅰ7 is used to detect whether the valve to be detected passes through the end of the input conveyor belt 1. If the valve to be detected passes through the end of the input conveyor belt 1, the infrared sensor Ⅰ7 issues a lifting instruction to the baffle Ⅰ8, and the baffle Ⅰ8 is used to block the subsequent valves to be detected on the input conveyor belt 1 from entering the detection unit; in order to avoid the valve to be detected on the input conveyor belt 1 from being blocked, when the valve to be detected passes through the end of the input conveyor belt 1, the infrared sensor Ⅰ7 can also issue a stop instruction to the power source that provides power for the input conveyor belt 1. The power source generally uses an existing motor to drive the input conveyor belt 1, which will not be repeated here.

[0039] In this embodiment, the detection unit also includes a detection platform 9 and a liftable track 10 symmetrically arranged on both sides of the detection platform 9, the liftable track 10 has a minimum height and a maximum height, and when the liftable track 10 is at the maximum height, it is used to receive the valve to be detected transmitted by the input unit, and when the valve to be detected is detected, the liftable track 10 is at the minimum height and is located in the same plane as the detection platform 9; a liftable baffle II 11 is provided on the detection platform 9, and the baffle II 11 is used to intercept the valve to be detected and limit the valve to be detected in the transmission direction with the baffle I8; the liftable track 10 can ensure that the valve is raised to the set height during the detection process, and cooperates with the positioning sensor 31 on the positioning block I3 to complete the positioning of the valve, and the maximum height of the liftable track 10 is lower than the height of the baffle I8 and the baffle II 11 when they are raised.

[0040] In this embodiment, the classification unit includes a drivable rotating table 18 and a transmission track 19 arranged on the rotating table 18, the transmission track 19 is used to receive the valve detected by the detection unit, the height of the transmission track 19 is the same as the minimum height of the liftable track 10, and a liftable baffle III20 is provided on the rotating table, the baffle III20 is used to intercept the leaking valve, and a collision sensor is provided in the baffle III20; the collision sensor is used to control the start and stop of the rotating table 18, when the baffle III20 intercepts the leaking valve, the collision sensor detects the collision between the leaking valve and the baffle III20, and controls the rotating table 18 to rotate to the output unit receiving the leaking valve; Figure 1As shown, the rotating table 18 is tangent to the receiving end of the output unit and the output end of the detection unit respectively. While ensuring that the rotating table 18 is rotatable, the transmission track 19 arranged on the rotating table 18 can more conveniently receive the valve that has been detected by the detection unit and transport the detected valve to the output unit; the transmission track 19 is respectively provided with a transmission roller group 21 at both ends, and the transmission roller group 21 is easy to roll, which is convenient for the valve to transition from the detection unit to the transmission track 19 on the rotating table 18, and convenient for the valve to transition from the transmission track 19 on the rotating table 18 to the output unit; the height of the transmission track 19 is the same as the minimum height of the liftable track 10, which can ensure that after the valve detection is completed, when the liftable track 10 drops to the minimum height, the transmission track can directly receive the valve transported by the liftable track 10.

[0041] In this embodiment, an infrared sensor II 25 is provided between the detection unit and the classification unit. When the detection unit conveys the detected valve to the classification unit, the infrared sensor II 25 is used to detect the detected valve. When the detected valve is detected to pass, the infrared sensor II 25 controls the baffle I 8 to descend. Optionally, Figure 1 As shown, a transition platform 39 can be arranged between the detection unit and the classification unit. The transition platform 39 is provided with a transmission track having the same height as the transmission track 19 on the rotating round table 18, which plays a transition role and makes the transportation process smoother.

[0042] In this embodiment, a valve fixing assembly is also included, and the valve fixing assembly includes a fixed bottom plate 28, an upper cover plate 29 and a lower cover plate 30. The fixed bottom plate 28 has a T-shaped groove, and the lower cover plate 30 can be driven and moved to be arranged on the T-shaped groove. The upper cover plate 29 and the lower cover plate 30 are used to support and fix the valve ports at both ends of the valve; Figure 3 , Figure 4 and Figure 5As shown, a T-slot is provided on the fixed bottom plate 28, and the fixed bottom plate 28 can slide back and forth in the T-slot and can be removed. Optionally, telescopic cylinders 36 are arranged inside the two sides of the T-slot, and the fixed bottom plate 28 is provided with inner circular holes on the two sides corresponding to the telescopic cylinders 36. The telescopic switch on the fixed bottom plate 28 controls the telescopic cylinders 36, so that the valve fixing device can fix and install valves to be tested of different lengths; an elastic member 33 is provided in the middle of the fixed bottom plate 28. The bottom of the valve core of the valve to be tested usually has different types and when the valve is long, there is vibration during operation. If the valve fixing device is only supported by the left and right sides, the service life will be reduced. The installation of the middle elastic member 33 for support will greatly increase the service life of the valve fixing device and the stability of the operation of the entire device. The elastic member 33 can adopt the existing columnar spring, etc., which is not mentioned here. To repeat; the two ports of the valve to be tested can be supported and fixed by the upper cover plate 29 and the lower cover plate 30, and the upper cover plate 29 and the lower cover plate 30 have semicircular inner grooves in the semicircular tiger's mouth, and the inner grooves can hold valves of different calibers of the valve to be tested. This design can fix and install valves of different calibers and different models of the valve to be tested; the upper cover plate 29 and the lower cover plate 30 are connected by a movable pin 34, and the upper cover plate 29 can rotate around the movable pin 34; the upper cover plate 29 and the lower cover plate 30 are respectively provided with a protrusion 35 symmetrical to the movable pin 34, and the protrusion 35 has a thread. When the upper cover plate 29 and the lower cover plate 30 are closed to fix the valve, the protrusion 35 can be locked to the upper cover plate 29 and the lower cover plate 30 by a nut, and other mechanical connection methods can also be used to lock the upper cover plate 29 and the lower cover plate 30, which will not be repeated here.

[0043] In this embodiment, a processor is also included, which is generally composed of an existing CPU and peripheral circuits, or a single-chip microcomputer is used. In this solution, a computer 27 integrated on a workbench 6 is used to control the detection unit, input unit, classification unit and output unit to achieve human-computer interaction of the system. Other existing technologies can also be used for replacement and control, which will not be repeated here. A tool box 40 can be set next to the computer 27. The tool box 40 stores the maintenance equipment and replacement parts required in the automated detection system, which is convenient for on-site staff to maintain and repair the automated detection system.

[0044] In this embodiment, the working process of the valve automatic detection system for valve sealing detection of the present application is as follows:

[0045] The valve to be inspected is fixed by the valve fixing assembly and transported to the detection unit through the input conveyor belt 1. The infrared sensor Ⅰ7 located at the end of the input conveyor belt 1 will detect and identify the valve to be inspected when the valve to be inspected is transported to the end of the input conveyor belt 1. After the valve to be inspected has completely passed the end of the input conveyor belt 1, the infrared sensor Ⅰ7 will issue a rising command to the baffle Ⅰ8. The raised baffle Ⅰ8 intercepts the remaining valves to be inspected on the input conveyor belt 1. Optionally, when the baffle Ⅰ8 is raised, the infrared sensor Ⅰ7 can also issue a stop command to the input conveyor belt 1.

[0046] After the valve to be tested enters the testing unit, the baffle plate II 11 is raised by the computer 27 and the liftable crawler 10 is started to drive the valve to be tested to move. When the valve to be tested collides with the baffle plate II 11, the liftable crawler 10 stops and rises. During the lifting process, the positioning sensor 31 on the positioning block I3 will simultaneously detect the valve port position of the valve to be tested. When the positioning sensor 31 locates the valve port position, the liftable crawler 10 stops rising, and the positioning blocks I3 and II4 are respectively moved by the retractable cylindrical rod 5. It stretches and retracts until the valve port of the valve to be tested is blocked by the positioning block Ⅰ3 and the positioning block Ⅱ4. After sealing, the compressed air pump 13 is started to deliver air to the chamber on the side of the valve port blocked by the positioning block Ⅰ3 and the pressure is detected by the pressure sensor Ⅰ32 on the positioning block Ⅰ3 to make it reach the set detection pressure. The pressure sensor Ⅱ on the positioning block Ⅱ4 detects the initial pressure of the valve port initially blocked by the positioning block Ⅱ4. When the valve port blocked by the positioning block Ⅰ3 reaches the set detection pressure, the initial pressure is compared with the set detection pressure and analyzed for a while.

[0047] When the valve to be inspected has no leakage, the staff operates the computer 27 to control the retractable cylindrical rod 5 to retract, and the baffle II 11 and the liftable crawler 10 start to descend respectively. When the baffle II 11 is completely descended and the liftable crawler 10 is descended to the minimum height, the liftable crawler 10 starts to run, driving the inspected valve to be transported to the classification unit and then transported to the qualified product output conveyor belt 24 through the classification unit. In the process of the inspected valve being transported from the inspection unit to the classification unit, the infrared sensor II 25 performs a through detection on the inspected valve. When the passage of the inspected valve is detected, the infrared sensor II 25 controls the baffle I8 to descend and starts the input conveyor belt 1, so that the subsequent valves to be inspected on the input conveyor belt 1 are then transported to the inspection unit for inspection.

[0048] When the pressure of the valve to be tested drops during the process of comparing the initial pressure with the set test pressure and continuing for a while, the valve to be tested is leaking. At this time, the pressure leakage alarm sensor 26 located on the workbench 6 will sound and light up, prompting the staff that the valve to be tested is leaking. The staff operates the computer 27 to start the compressed air pump 13 and heat the delivered air, so that the air with a certain amount of heat fills the inner cavity of the valve to be tested. When the pressure sensor I 32 detects that the pressure in the valve cavity to be tested reaches the set pressure, the compressed air pump 13 stops supplying air, and the thermal infrared graphic sensor 44 starts working to detect the air with a certain amount of heat leaking from the valve core. A certain amount of air is taken to take an image, which is then uploaded to the computer 27. The staff will start the baffle III 20 on the rotating table 18 to rise. After the valve has been inspected, it is transported to the classification unit through the transmission track 19 on the classification unit until it collides with the baffle III 20, triggering the internal collision sensor to control the transmission track 19 to stop. At this time, the rotating table 18 rotates until the output end of the transmission track 19 is opposite to the receiving end of the defective product output conveyor belt 23 that receives defective products. At this time, the staff will start the transmission track 19 on the rotating table 18 again to transport the valve that has been inspected and is a defective product to the defective product output conveyor belt 23. After the transportation is completed, the rotating table 18 is controlled to reset.

[0049] When the rotating table 18 rotates, the defective product output conveyor belt 23 will be started through the control of the computer 27, and is used to receive valves that have been inspected and are defective. A timing sensor 22 can also be set on the defective product output conveyor belt 23. The timing sensor 22 can generally be set at the receiving end of the defective product output conveyor belt 23. The timing sensor 22 is used to detect whether there is a valve passing through the defective product output conveyor belt 23 within a set time. The set time is greater than the time it takes for the valves that have been inspected and are defective to be transported from the rotating table 18 to the defective product output conveyor belt 23; if no valve passes within the set time, the timing sensor 22 will transmit a signal to the defective product output conveyor belt 23 to stop working.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A valve automatic detection system for valve sealing detection, characterized in that: include: An input unit, used for receiving and delivering the valve to be inspected; A detection unit, used for receiving the valve to be detected delivered by the input unit to perform a sealing detection; A classification unit, which classifies the tested valves according to the test results of the leak detection unit; The output unit is used to receive the valves classified by the classification unit and transport them to the set positions.

2. The valve automatic detection system for valve sealing detection according to claim 1, characterized in that: The detection unit includes a fixing mechanism and a detection component. The fixing mechanism includes a symmetrically arranged mounting base. The mounting base is provided with a positioning block I and a positioning block II respectively. The positioning block I and the positioning block II are telescopically mounted on the mounting base. The positioning block I and the positioning block II are in a truncated cone shape.

3. The valve automatic detection system for valve sealing detection according to claim 2, characterized in that: The detection component includes a positioning sensor for locating the valve port of the valve to be detected, and a pressure sensor I and a pressure sensor II for detecting the cavity pressure on both sides of the valve. The positioning sensor and pressure sensor I are arranged on the positioning block I, and the pressure sensor II is arranged on the positioning block II.

4. The valve automatic detection system for valve sealing detection according to claim 2, characterized in that: The detection component also includes a compressed air pump and a thermal infrared image sensor. A pressure test air passage is opened inside the positioning block I. The compressed air pump is connected to the pressure test air passage through an air pipe. The thermal infrared image sensor is arranged on the positioning block II. The compressed air pump is used to supply air to the chamber on the valve port side blocked by the positioning block I and reach the set detection pressure. When the valve leaks, the compressed air pump heats the supplied gas and detects the leakage position through the thermal infrared image sensor.

5. The valve automatic detection system for valve sealing detection according to claim 1, characterized in that: The input unit comprises a liftable baffle plate I and an infrared sensor I arranged at the end. When the valve to be detected passes through the end of the input unit, the infrared sensor I controls the baffle plate I to rise.

6. The valve automatic detection system for valve sealing detection according to claim 1, characterized in that: The detection unit also includes a detection platform and liftable tracks symmetrically arranged on both sides of the detection platform, the liftable tracks have a minimum height and a maximum height, and when the liftable tracks are at the maximum height, they are used to receive the valve to be detected transmitted by the input unit, and when the valve to be detected is detected, the liftable tracks are at the minimum height and are located in the same plane as the detection platform; a liftable baffle II is provided on the detection platform, and the baffle II is used to intercept the valve to be detected and limit the valve to be detected in the transmission direction together with the baffle I.

7. The valve automatic detection system for valve sealing detection according to claim 1, characterized in that: The classification unit includes a drivable rotating table and a transmission track, wherein the transmission track is used to receive the valves detected by the detection unit, and the transmission track is located at the maximum height of the liftable track. A liftable baffle III is provided on the rotating table, and the baffle III is used to intercept leaking valves, and a collision sensor is provided inside the baffle III.

8. The valve automatic detection system for valve sealing detection according to claim 7, characterized in that: The collision sensor is used to control the start and stop of the rotating table. When the baffle III intercepts a leaking valve, the collision sensor detects the collision between the leaking valve and the baffle III, and controls the rotating table to rotate to receive the output conveyor belt of the leaking valve.

9. The valve automatic detection system for valve sealing detection according to claim 1, characterized in that: An infrared sensor II is provided between the detection unit and the classification unit. When the detection unit transports the detected valve to the classification unit, the infrared sensor II is used to detect the detected valve. When the detected valve is detected to pass, the infrared sensor II controls the baffle I to descend.

10. The valve automatic detection system for valve sealing detection according to claim 1, characterized in that: It also includes a valve fixing assembly, which includes a fixed base plate, an upper cover plate and a lower cover plate. The fixed base plate is provided with a T-shaped slot, and the lower cover plate can be driven and movably arranged on the T-shaped slot. The upper cover plate and the lower cover plate are used to support and fix the valve ports at both ends of the valve.

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