Device and method for preventing impeller mixing in a multi-variety production condition

Abstract

The application discloses a device and method for preventing impeller mixing under multi-species production conditions. The device for preventing impeller mixing comprises a transparent glass turntable, an impeller side profile projection size detector, a blade number and position distribution detector, and a rejection air cylinder for transferring abnormal impellers from the transparent glass turntable to an abnormal impeller belt conveyor. The impeller side profile projection size detector comprises an impeller side projection background plate vertically arranged above the transparent glass turntable on the inner side of the circumference, and a first visual recognition camera arranged on the outer side of the transparent glass turntable and pointing to the impeller side projection background plate from the horizontal direction. The blade number and position distribution detector comprises an impeller front projection background plate arranged below the transparent glass turntable and upwardly arranged, and a second visual recognition camera arranged above the transparent glass turntable and having a lens downwardly pointing to the impeller front projection background plate. The application can prevent mixing of different specifications of impellers under multi-species production conditions.

Description

Technical Field

[0001] This invention relates to the field of impeller manufacturing technology, and specifically to a device and method for preventing impeller material mixing under multi-product production conditions. Background Technology

[0002] The impeller is a core rotor component of rotating machinery such as pumps, steam turbines, and turbine generators. For example... Figure 9 The above describes a typical impeller structure, which includes an impeller body and a number of blades disposed on the impeller body. The blades are usually curved surfaces.

[0003] When manufacturing impellers under multi-variety production conditions, due to the variety of impeller specifications, similar shapes, and basically the same outer diameter, impellers may have different detailed dimensions and number of blades. Therefore, if impellers of different specifications with basically the same size and shape are mixed in with the production of one specification of impellers, it is not easy for production personnel to identify them. As a result, it may only be discovered when the impeller products are packaged and shipped to the customer. This may cause significant reputational and economic losses to the impeller manufacturer. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a device and method for preventing impeller mixing under multi-product production conditions, aiming to prevent the mixing of impellers of different specifications under such conditions. The specific technical solution is as follows:

[0005] A device for preventing impeller mixing under multi-product production conditions includes a rotatable transparent glass turntable, a feed belt conveyor docked at the feed side of the transparent glass turntable, a discharge belt conveyor docked at the discharge side of the transparent glass turntable, an abnormal impeller belt conveyor docked beside the transparent glass turntable for receiving abnormal impellers, an impeller side profile projection size detector for detecting the side profile projection size of the impellers on the transparent glass turntable, a blade number and position distribution detector for detecting the number and distribution of blades on the front of the impellers on the transparent glass turntable, and a rejection cylinder for transferring abnormal impellers from the transparent glass turntable to the abnormal impeller belt conveyor; the impeller side profile projection size detector includes a component vertically mounted on the transparent glass turntable. The system includes: an impeller side projection background plate located on the inner side of the upper part of the turntable; a first visual recognition camera positioned on the outer side of the transparent glass turntable and pointing horizontally towards the impeller side projection background plate; a blade quantity and position distribution detector comprising an impeller front projection background plate positioned below the transparent glass turntable and facing upwards; and a second visual recognition camera positioned above the transparent glass turntable with its lens pointing downwards towards the impeller front projection background plate; a rejection cylinder fixedly positioned on the inner side of the upper part of the transparent glass turntable, with its piston rod pointing towards the feed side of the abnormal impeller belt conveyor; and the impeller side profile projection size detector, blade quantity and position distribution detector, and rejection cylinder arranged sequentially according to the movement direction of the impeller on the transparent glass turntable.

[0006] Preferably, the device for preventing impeller mixing under multi-product production conditions of the present invention is further provided with an impeller back contour projection size detector for detecting the back contour projection size of the impeller located on the transparent glass turntable. The impeller back contour projection size detector includes an impeller back projection background plate disposed above the transparent glass turntable and facing downwards, and a third vision recognition camera disposed below the transparent glass turntable with its lens pointing upwards towards the impeller back projection background plate. The impeller side contour projection size detector, the blade number and position distribution detector, the impeller back contour projection size detector, and the rejection cylinder are arranged sequentially according to the movement direction of the impeller on the transparent glass turntable.

[0007] Preferably, the lens of the first visual recognition camera is provided with a first ring-shaped illumination source, and the first ring-shaped illumination source faces the direction of the side projection background plate of the impeller; the lens of the second visual recognition camera is provided with a second ring-shaped illumination source, and the second ring-shaped illumination source faces the direction of the front projection background plate of the impeller; the lens of the third visual recognition camera is provided with a third ring-shaped illumination source, and the third ring-shaped illumination source faces the direction of the back projection background plate of the impeller.

[0008] In this invention, the impeller side projection background plate, the impeller front projection background plate, and the impeller back projection background plate all include a glass panel, a backlight box disposed on the back side of the glass panel, and an LED white backlight source disposed in the backlight box.

[0009] In this invention, the first ring light source, the second ring light source, and the third ring light source are all LED ring light sources.

[0010] Preferably, the device for preventing impeller mixing under multi-product production conditions of the present invention further includes a frame and a stepper motor mounted on the frame, wherein a connecting plate is mounted on the motor shaft of the stepper motor, and the transparent glass turntable is fixed on the connecting plate.

[0011] In this invention, the impeller side projection background plate, the first visual recognition camera, the first ring light source, the impeller front projection background plate, the second visual recognition camera, the second ring light source, the impeller back projection background plate, the third visual recognition camera, and the third ring light source are all fixed on the frame.

[0012] Preferably, a first horizontal cantilever and a second horizontal cantilever extending to the inner side of the transparent glass turntable are respectively fixedly installed on the frame. The impeller side projection background plate is fixedly installed at the cantilever end of the first horizontal cantilever, and the rejection cylinder is fixedly installed at the cantilever end of the second horizontal cantilever.

[0013] In order to smoothly transfer the impeller from the feed belt conveyor to the transparent glass turntable, an impeller feed guide rod is provided at the feed side of the transparent glass turntable, and the impeller feed guide rod is horizontally obliquely straddling the upper part of the feed belt conveyor.

[0014] In this invention, a feed side guide rod mounting bracket is provided on one side of the feed belt conveyor, and one end of the impeller feed guide rod is mounted on the feed side guide rod mounting bracket.

[0015] Preferably, the impeller feed guide rod is rotatably mounted on the feed-side guide rod mounting bracket via a hinge shaft and is fixed by locking screws.

[0016] As a further improvement of the present invention, in order to improve the reliability of the impeller transferring from the feed belt conveyor to the transparent glass turntable, a pair of drive wheels are rotatably arranged at both ends of the impeller feed guide rod, and a drive belt is arranged between the pair of drive wheels. The outer side of the drive belt is perpendicular to the horizontal conveying surface of the feed belt conveyor. The drive wheel near the end of the feed side guide rod mounting bracket is driven to rotate by a drive motor, and the drive wheel away from the end of the feed side guide rod mounting bracket is freely rotatably mounted on the rotating seat at the end of the impeller feed guide rod.

[0017] Preferably, the rotating seat is a bearing seat with a built-in rolling bearing, and the transmission wheel is rotatably mounted on the rolling bearing of the bearing seat.

[0018] During the process of the impeller being transferred from the feed belt conveyor to the transparent glass turntable, the side of the impeller abuts against the outer surface of the drive belt; when the drive belt moves, the impeller abutting against the outer surface of the drive belt is smoothly transferred from the feed belt conveyor to the transparent glass turntable by the combined action of the conveying force of the feed belt conveyor and the auxiliary propulsion force of the drive belt.

[0019] In order to smoothly transfer the qualified impellers from the transparent glass turntable to the discharge belt conveyor, an impeller discharge guide rod is provided on the discharge side of the transparent glass turntable, and the impeller discharge guide rod is horizontally obliquely straddling the upper part of the discharge belt conveyor.

[0020] In this invention, a discharge side guide rod mounting frame is provided on one side of the discharge belt conveyor, and one end of the impeller discharge guide rod is mounted on the discharge side guide rod mounting frame.

[0021] Preferably, the impeller discharge guide rod is rotatably mounted on the discharge side guide rod mounting bracket via a hinge shaft and fixed by locking screws.

[0022] As a further improvement, the device for preventing impeller mixing under multi-product production conditions of the present invention is further provided with a positive and negative pressure composite cleaning device for maintaining the cleanliness of the surface of the transparent glass turntable. The positive and negative pressure composite cleaning device includes a dust collection box cover disposed at the composite cleaning position of the transparent glass turntable and covering the front and back of the transparent glass turntable, a negative pressure vacuum cleaner connected to the inner cavity of the dust collection box cover through a negative pressure suction pipe, an air knife disposed inside the dust collection box cover with its air outlet close to the surface of the transparent glass turntable, and a compressed air source connected to the air knife through a compressed air pipe.

[0023] Preferably, the dust collector cover has a U-shaped opening that is directly connected to the closed inner cavity of the dust collector cover, and the front and back of the transparent glass turntable enter the U-shaped opening.

[0024] Preferably, the U-shaped opening of the dust collector cover and the air outlet of the air knife are respectively fitted with the surface of the transparent glass turntable with a clearance.

[0025] As a further improvement, the device for preventing impeller mixing under multi-product production conditions of the present invention is further provided with a blade profile feature extractor for extracting blade profile feature data on the front side of the impeller; the blade profile feature extractor includes a linear guide rail assembly fixed on the frame and located above the transparent glass turntable, a rotary motor movably mounted on the linear guide rail assembly, an indexing plate mounted on the motor shaft of the rotary motor, and a distance measuring sensor array mounted on the indexing plate.

[0026] In this invention, the linear guide rail assembly is provided with a movable seat and a linear drive device for driving the movable seat to move linearly, and the rotary motor is mounted on the movable seat.

[0027] Preferably, the impeller side profile projection size detector, blade number and position distribution detector, impeller back profile projection size detector, blade surface feature extractor, and rejection cylinder are arranged sequentially according to the movement direction of the impeller on the transparent glass turntable.

[0028] Preferably, the ranging sensor array includes a plurality of infrared ranging sensors arranged in a circular array on the indexing plate, with the ranging direction of the infrared ranging sensors pointing downwards toward the front of the impeller on the transparent glass turntable; the feeding belt conveyor, the discharging belt conveyor, the abnormal impeller belt conveyor, the rejection cylinder, the first visual recognition camera, the second visual recognition camera, the third visual recognition camera, the stepper motor, the angle motor, and the ranging sensor array are respectively connected to the control system, and the control system is respectively provided with a first visual recognition program module for recognizing and extracting the shape and size data of the impeller side profile projection image, a second visual recognition program module for recognizing and extracting the shape and size data of the impeller front profile projection image and the front blade number distribution data, and a third visual recognition program module for recognizing and extracting the shape and size data of the impeller back profile projection image.

[0029] Preferably, the impeller side profile projection shape and size data includes impeller height, impeller outer diameter, etc.

[0030] Preferably, the impeller back profile projection shape and size data includes the impeller major diameter, impeller minor diameter, etc.

[0031] A method for preventing impeller mixing under multi-product production conditions includes the following steps:

[0032] S0, Impeller Conveying: The impeller is conveyed towards the transparent glass turntable by the feed belt conveyor until it reaches the feed side of the transparent glass turntable. Under the action of inertial movement, the impeller enters the transparent glass turntable along the impeller feed guide rod at the docking point between the feed belt conveyor and the transparent glass turntable.

[0033] S1. Impeller side profile projection size detection: The impeller moves with the rotating transparent glass turntable until it reaches the impeller side profile projection size detection position. The first vision recognition camera in the impeller side profile projection size detector acquires the side profile projection image of the impeller on the impeller side projection background plate. The first vision recognition program module identifies and detects the size of the impeller side profile projection image. The control system determines whether the impeller is an abnormal impeller based on the size of the impeller side profile projection image.

[0034] S2. Blade Quantity and Position Distribution Detection: The impeller continues to move with the rotating transparent glass turntable until it reaches the blade quantity and position distribution detection position. The second vision recognition camera in the blade quantity and position distribution detector acquires the front projection image of the impeller on the impeller front projection background plate. The second vision recognition program module identifies and detects the blade quantity and position distribution in the impeller front projection image. The control system determines whether the impeller is an abnormal impeller based on the blade quantity and position distribution.

[0035] S3. Impeller Back Contour Projection Size Detection: The impeller continues to move with the rotating transparent glass turntable until it reaches the impeller back contour projection size detection position. The third vision recognition camera in the impeller back contour projection size detector acquires the back contour projection image of the impeller on the impeller back projection background plate. The third vision recognition program module identifies and detects the size of the impeller back contour projection image. The control system determines whether the impeller is an abnormal impeller based on the size of the impeller back contour projection image.

[0036] S4. Transfer of qualified impellers and rejection of abnormal impellers: For abnormal impellers detected in step S2 or S3, when the abnormal impeller moves with the rotating transparent glass turntable to the abnormal impeller rejection position, the control system drives the rejection cylinder to push the abnormal impeller onto the abnormal impeller belt conveyor. The abnormal impeller is then transported to the abnormal impeller collection box via the abnormal impeller belt conveyor. Impellers that are not rejected on the transparent glass turntable continue to move with the rotating transparent glass turntable until they reach the discharge side of the transparent glass turntable. Under the action of inertial movement, the impellers enter the discharge belt conveyor along the impeller discharge guide rod at the junction of the transparent glass turntable and the discharge belt conveyor. The impellers are then transported to the impeller packaging station for packaging via the discharge belt conveyor.

[0037] As a further improvement of the present invention, the following step is provided between step S3 and step S4:

[0038] S3A, Blade Profile Feature Extraction: The impeller continues to move with the rotating transparent glass turntable until it reaches the blade profile feature extraction position. Before the impeller reaches the extraction position, the control system, based on the blade number and position distribution data obtained in step S2, pre-drives the blade profile feature extractor to move the indexing plate on the motor shaft of the rotary motor in the blade profile feature extractor to the center of the blade profile feature extraction position via a linear guide assembly (this center coincides with the impeller center, and the impeller center radius data is obtained by the control system). The system obtains the blade number and position distribution online from the detector, and pre-adjusts the circumferential angle of the indexing plate on the motor shaft of the angle motor so that the circumferential distribution position of the ranging sensor array on the indexing plate matches the circumferential distribution position of the blades obtained in step S2; when the impeller reaches the blade profile feature extraction position, the ranging sensor array on the indexing plate measures the vertical coordinate data of the corresponding blade profile on the impeller; the control system determines whether the impeller is abnormal based on the vertical coordinate data of the corresponding blade profile on the impeller measured by the ranging sensor array.

[0039] Preferably, an error range can be preset for the impeller side profile projection image size data, impeller back profile projection image size data, and vertical coordinate data of the corresponding blade profile on the impeller. The control system compares the measured impeller data with the standard impeller. If the data exceeds the preset error range, the impeller is determined to be an abnormal impeller.

[0040] Preferably, during the rotation of the transparent glass turntable, the control system also activates a positive and negative pressure composite cleaning device to continuously clean both sides of the transparent glass turntable using positive and negative pressure composite cleaning. During positive and negative pressure composite cleaning, compressed air blown out by the air knife located inside the dust collector cover blows away the dirt adhering to the surface of the transparent glass turntable and seals it inside the dust collector cover cavity. The negative pressure gas inside the dust collector cover cavity, connected to the negative pressure suction pipe, sucks away the dirt. The sucked-away dirt is collected by a dust collector connected to the negative pressure suction pipe.

[0041] In this invention, the control system pre-stores data such as the size and shape of all impellers produced in the factory. The control system compares the data measured by the impeller side profile projection size detector, the blade quantity and position distribution detector, the impeller back profile projection size detector, and the blade surface feature extractor with the stored data of the impeller, and can also identify the specifications and models of abnormal impellers.

[0042] The beneficial effects of this invention are:

[0043] First, in the device and method for preventing impeller mixing under multi-variety production conditions of the present invention, multiple vision discrimination components for extracting impeller characteristic parameters are provided, including an impeller side profile projection size detector, a blade number and position distribution detector, and an impeller back profile projection size detector. It realizes the detection of impeller side profile projection size, blade number and position distribution, and impeller back profile projection size through image recognition technology. By comparing the detection data with standard impellers, it can be determined whether abnormal impellers have been mixed in with the produced impellers. The entire detection and judgment process is automatically completed by the control system, and unqualified abnormal impellers can be automatically rejected, which has a high degree of automation.

[0044] Secondly, in the device and method for preventing impeller mixing under multi-variety production conditions of the present invention, a blade profile feature extractor is provided, which can detect the profile coordinate dimensions of the impeller. It works in conjunction with the impeller side profile projection size detector, the blade number and position distribution detector, and the impeller back profile projection size detector to identify other specifications of impellers with very high similarity, thereby further improving the reliability of preventing impeller mixing under multi-variety production conditions.

[0045] Third, in the device and method for preventing impeller mixing under multi-variety production conditions of the present invention, an auxiliary transmission and cleaning assembly is also provided. The auxiliary transmission and cleaning assembly includes an auxiliary transmission assembly and a cleaning assembly. The auxiliary transmission assembly, through an impeller feed guide rod positioned above the feed side of the transparent glass turntable and horizontally across the upper part of the feed belt conveyor, realizes the smooth transition and conveying of the impeller from the feed belt conveyor to the transparent glass turntable. It can also ensure that the impeller reaches the circumferential radius position after arriving at the transparent glass turntable, which facilitates the subsequent impeller inspection to enter the lens range of the visual recognition camera more accurately and reliably, improving the clarity of the impeller image capture. The auxiliary transmission assembly also realizes the transfer of the impeller from the transparent glass turntable to the discharge belt conveyor through an impeller discharge guide rod positioned above the feed side of the transparent glass turntable and horizontally across the upper part of the discharge belt conveyor, ensuring the smooth discharge of the impeller.

[0046] Fourth, in the device and method for preventing impeller mixing under multi-product production conditions of the present invention, the auxiliary cleaning component adopts a positive and negative pressure composite cleaning device, which can perform online positive and negative pressure composite cleaning on both sides of the transparent glass turntable, thereby improving the cleaning effect, ensuring the accuracy of the impeller image acquired by the visual recognition camera, and further improving the reliability of preventing impeller mixing under multi-product production conditions. Attached Figure Description

[0047] Figure 1This is a schematic diagram (top view) of a device for preventing impeller mixing under multi-product production conditions according to the present invention.

[0048] Figure 2 yes Figure 1 A schematic diagram (side view) of the structure involving the impeller side profile projection dimension detector part;

[0049] Figure 3 yes Figure 1 A schematic diagram (side view) of the structure involving the impeller back profile projection dimension detector part;

[0050] Figure 4 yes Figure 1 A schematic diagram (side view) of the detector section involving the number and position distribution of blades;

[0051] Figure 5 yes Figure 1 A schematic diagram (side view) of the structure of the blade profile feature extractor part;

[0052] Figure 6 yes Figure 1 A structural schematic diagram (side view) of the part involving the positive and negative pressure composite cleaning device.

[0053] Figure 7 yes Figure 6 An enlarged schematic diagram of the positive and negative pressure composite cleaning device in the middle;

[0054] Figure 8 Is Figure 1 A schematic diagram of a structure in which a transmission belt is installed on the impeller feed guide rod;

[0055] Figure 9 This is a schematic diagram of the impeller structure.

[0056] In the diagram: 1. Transparent glass turntable; 2. Feed belt conveyor; 3. Discharge belt conveyor; 4. Abnormal impeller belt conveyor; 5. Impeller side profile projection size detector; 6. Blade quantity and position distribution detector; 7. Rejection cylinder; 8. Impeller side projection background plate; 9. First visual recognition camera; 10. Impeller front projection background plate; 11. Second visual recognition camera; 12. Impeller back profile projection size detector; 13. Impeller back projection background plate; 14. Third visual recognition camera; 15. First annular illumination source; 16. Second annular illumination source; 17. Third annular illumination source; 18. Frame; 19. Stepper motor; 20. Connecting plate; 21. First horizontal cantilever; 22. Second horizontal cantilever; 2 3. Impeller feed guide rod; 24. Impeller discharge guide rod; 25. Positive and negative pressure composite cleaning device; 26. Dust collector cover; 27. Negative pressure dust collection pipeline; 28. Air knife; 29. ​​Compressed air pipeline; 30. Blade profile feature extractor; 31. Linear guide rail assembly; 32. Angle motor; 33. Moving seat; 34. Indexing plate; 35. Distance sensor array; 36. Infrared distance sensor; 37. Impeller; 37.1. Blade; 38. U-shaped opening; 39. Air knife fixing screw; 40. Feed side guide rod mounting bracket; 41. Hinge shaft; 42. Locking screw; 43. Drive wheel; 44. Drive belt; 45. Drive motor; 46. Rotating seat; 47. Horizontal conveying surface of conveyor belt; 48. Discharge side guide rod mounting bracket.

[0057] In the figure: A, the location for detecting the projected dimensions of the impeller side profile; B, the location for detecting the number and position distribution of blades; C, the location for detecting the projected dimensions of the impeller back profile; D, the location for extracting blade surface features; E, the location for composite cleaning. Detailed Implementation

[0058] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0059] Example 1:

[0060] like Figures 1 to 9The illustration shows an embodiment of a device for preventing impeller mixing under multi-product production conditions according to the present invention. It includes a rotatable transparent glass turntable 1, a feed belt conveyor 2 connected to the feed side of the transparent glass turntable 1, a discharge belt conveyor 3 connected to the discharge side of the transparent glass turntable 1, an abnormal impeller belt conveyor 4 connected to the transparent glass turntable 1 for receiving abnormal impellers, an impeller side profile projection size detector 5 for detecting the side profile projection size of the impeller 37 located on the transparent glass turntable 1, a blade number and position distribution detector 6 for detecting the number and distribution of blades on the front of the impeller on the transparent glass turntable 1, and a rejection cylinder 7 for transferring abnormal impellers from the transparent glass turntable 1 to the abnormal impeller belt conveyor 4. The impeller side profile projection size detector 5 includes a vertically mounted device on the transparent glass turntable 1. The impeller side projection background plate 8 is located on the inner side of the glass turntable 1 above the glass turntable 1, and a first visual recognition camera 9 is located on the outer side of the transparent glass turntable 1 above the impeller side projection background plate 8 and points horizontally towards the impeller side projection background plate 8; the blade quantity and position distribution detector 6 includes an impeller front projection background plate 10 located below the transparent glass turntable 1 and facing upwards, and a second visual recognition camera 11 located above the transparent glass turntable 1 with its lens pointing downwards towards the impeller front projection background plate 10; the rejection cylinder 7 is fixedly located on the inner side of the transparent glass turntable 1 above the glass turntable 1, and the piston rod of the rejection cylinder 7 points towards the feed side of the abnormal impeller belt conveyor 4; the impeller side profile projection size detector 5, the blade quantity and position distribution detector 6, and the rejection cylinder 7 are arranged sequentially according to the movement direction of the impeller 37 on the transparent glass turntable 1.

[0061] Preferably, the device for preventing impeller mixing under multi-product production conditions in this embodiment is further provided with an impeller back contour projection size detector 12 for detecting the back contour projection size of the impeller 37 located on the transparent glass turntable 1. The impeller back contour projection size detector 12 includes an impeller back projection background plate 13 disposed above the transparent glass turntable 1 and facing downward, and a third vision recognition camera 14 disposed below the transparent glass turntable 1 with its lens pointing upward towards the impeller back projection background plate 13. The impeller side contour projection size detector 5, the blade number and position distribution detector 6, the impeller back contour projection size detector 12, and the rejection cylinder 7 are arranged sequentially according to the movement direction of the impeller 37 on the transparent glass turntable 1.

[0062] Preferably, the lens of the first visual recognition camera 9 is surrounded by a first ring light source 15, and the first ring light source 15 faces the side projection background plate 8 of the impeller; the lens of the second visual recognition camera 11 is surrounded by a second ring light source 16, and the second ring light source 16 faces the front projection background plate 10 of the impeller; the lens of the third visual recognition camera 14 is surrounded by a third ring light source 17, and the third ring light source 17 faces the back projection background plate 13 of the impeller.

[0063] In this embodiment, the impeller side projection background plate 8, the impeller front projection background plate 10, and the impeller back projection background plate 13 all include a glass panel, a backlight box disposed on the back side of the glass panel, and an LED white backlight source disposed in the backlight box.

[0064] In this embodiment, the first ring light source 15, the second ring light source 16, and the third ring light source 17 are all LED ring light sources.

[0065] Preferably, the device for preventing impeller mixing under multi-variety production conditions in this embodiment further includes a frame 18 (shown only partially, the same below) and a stepper motor 19 disposed on the frame 18. A connecting disk 20 is disposed on the motor shaft of the stepper motor 19, and the transparent glass turntable 1 is fixed on the connecting disk 20.

[0066] In this embodiment, the impeller side projection background plate 8, the first visual recognition camera 9, the first ring light source 15, the impeller front projection background plate 10, the second visual recognition camera 11, the second ring light source 16, the impeller back projection background plate 13, the third visual recognition camera 14, and the third ring light source 17 are all fixed on the frame 18.

[0067] Preferably, a first horizontal cantilever 21 and a second horizontal cantilever 22 extending to the inner side of the transparent glass turntable 1 are respectively fixedly installed on the frame 18. The impeller side projection background plate 8 is fixedly installed at the cantilever end of the first horizontal cantilever 21, and the rejection cylinder 7 is fixedly installed at the cantilever end of the second horizontal cantilever 22.

[0068] In order to smoothly transfer the impeller 37 from the feed belt conveyor 2 to the transparent glass turntable 1, an impeller feed guide rod 23 is provided on the feed side of the transparent glass turntable. The impeller feed guide rod 23 is horizontally obliquely straddling the upper part of the feed belt conveyor 2.

[0069] In this invention, a feed side guide rod mounting bracket 40 is provided on one side of the feed belt conveyor 2, and one end of the impeller feed guide rod 23 is mounted on the feed side guide rod mounting bracket 40.

[0070] Preferably, the impeller feed guide rod 23 is rotatably mounted on the feed side guide rod mounting bracket 40 via a hinge shaft 41 and is fixed by a locking screw 42.

[0071] As a further improvement of the present invention, in order to improve the reliability of the impeller 37 moving from the feed belt conveyor 2 to the transparent glass turntable 1, a pair of drive wheels 43 are rotatably arranged at both ends of the impeller feed guide rod 23, and a drive belt 44 is arranged between the pair of drive wheels 43. The outer side of the drive belt 44 is perpendicular to the horizontal conveying surface 47 of the conveyor belt of the feed belt conveyor 2. The drive wheel 43 near the end of the feed side guide rod mounting bracket 40 is driven to rotate by the drive motor 45, and the drive wheel 43 away from the end of the feed side guide rod mounting bracket 40 is freely rotatably arranged on the rotating seat 46 at the end of the impeller feed guide rod 23.

[0072] Preferably, the rotating seat 46 is a bearing seat with a built-in rolling bearing, and the transmission wheel 43 is rotatably mounted on the rolling bearing of the bearing seat.

[0073] During the process of transferring the impeller 37 from the feed belt conveyor 2 to the transparent glass turntable 1, the side of the impeller 37 abuts against the outer surface of the drive belt 44; when the drive belt 44 moves, the impeller 37, which is abutting against the outer surface of the drive belt 44, is smoothly transferred from the feed belt conveyor 2 to the transparent glass turntable 1 by the combined action of the conveying force of the feed belt conveyor 2 and the auxiliary propulsion force of the drive belt 44.

[0074] In order to smoothly transfer the qualified impeller 37 from the transparent glass turntable 1 to the discharge belt conveyor 3, an impeller discharge guide rod 24 is provided on the discharge side of the transparent glass turntable 1. The impeller discharge guide rod 24 is horizontally obliquely straddling the upper part of the discharge belt conveyor 3.

[0075] In this invention, a discharge side guide rod mounting bracket 48 is provided on one side of the discharge belt conveyor 3, and one end of the impeller discharge guide rod 24 is mounted on the discharge side guide rod mounting bracket 48.

[0076] Preferably, the impeller discharge guide rod 24 is rotatably mounted on the discharge side guide rod mounting bracket 41 via a hinge and fixed by locking screws (not shown in the figure, but the structure is similar to the installation structure of the impeller feed guide rod).

[0077] As a further improvement, the device for preventing impeller mixing under multi-product production conditions in this embodiment is further provided with a positive and negative pressure composite cleaning device 25 for maintaining the cleanliness of the surface of the transparent glass turntable 1. The positive and negative pressure composite cleaning device 25 includes a dust collection box cover 26 disposed at the composite cleaning position of the transparent glass turntable 1 and covering the front and back of the transparent glass turntable 1, a negative pressure vacuum cleaner connected to the inner cavity of the dust collection box cover 26 through a negative pressure suction pipe 27, an air knife 28 disposed inside the dust collection box cover 26 with its air outlet close to the surface of the transparent glass turntable 1, and a compressed air source connected to the air knife 28 through a compressed air pipe 29.

[0078] Preferably, the dust collector cover 26 has a U-shaped opening 38 that is directly connected to the closed inner cavity of the dust collector cover 26, and the front and back sides of the transparent glass turntable 1 enter the U-shaped opening 38.

[0079] Preferably, the U-shaped opening 38 of the dust collector cover 26 and the air outlet of the air knife 28 are respectively fitted with the surface of the transparent glass turntable 1 with a clearance.

[0080] As a further improvement, the device for preventing impeller mixing under multi-product production conditions in this embodiment is further provided with a blade profile feature extractor 30 for extracting blade profile feature data on the front side of the impeller; the blade profile feature extractor 30 includes a linear guide rail assembly 31 fixed on the frame 18 and located above the transparent glass turntable 1, a rotary motor 32 movably mounted on the linear guide rail assembly 31, an indexing disk 34 mounted on the motor shaft of the rotary motor 32, and a distance measuring sensor array 35 mounted on the indexing disk 34.

[0081] In this embodiment, the linear guide rail assembly 31 is provided with a movable seat 33 and a linear drive device for driving the movable seat 33 to move linearly, and the rotary motor 32 is mounted on the movable seat 33.

[0082] Preferably, the impeller side profile projection size detector 5, the blade quantity and position distribution detector 6, the impeller back profile projection size detector 12, the blade surface feature extractor 30, and the rejection cylinder 7 are arranged sequentially according to the movement direction of the impeller 37 on the transparent glass turntable 1.

[0083] Preferably, the ranging sensor array 35 includes a plurality of infrared ranging sensors 36 arranged in a circumferential array on the indexing disk 34, with the ranging direction of the infrared ranging sensors 36 pointing downwards toward the front of the impeller 37 on the transparent glass turntable 1; the feeding belt conveyor 2, the discharging belt conveyor 3, the abnormal impeller belt conveyor 4, the rejection cylinder 7, the first visual recognition camera 9, the second visual recognition camera 11, the third visual recognition camera 14, the stepper motor 19, the angle motor 32, and the ranging sensor array 35 are respectively connected to the control system, and the control system is respectively provided with a first visual recognition program module for recognizing and extracting the shape and size data of the impeller side profile projection image, a second visual recognition program module for recognizing and extracting the shape and size data of the impeller front profile projection image and the front blade number distribution data, and a third visual recognition program module for recognizing and extracting the shape and size data of the impeller back profile projection image.

[0084] Preferably, the impeller side profile projection shape and size data includes the impeller height 37, the impeller outer diameter 37, etc.

[0085] Preferably, the impeller back profile projection shape and size data includes the impeller 37 major diameter, impeller 37 minor diameter, etc.

[0086] Example 2:

[0087] A method for preventing impeller mixing under multi-product production conditions includes the following steps:

[0088] S0, Impeller Conveying: The impeller 37 is conveyed to the transparent glass turntable 1 by the feed belt conveyor 2 until it reaches the feed side of the transparent glass turntable 1. Under the action of inertial movement, the impeller 37 enters the transparent glass turntable 1 along the impeller feed guide rod 23 at the docking point between the feed belt conveyor 2 and the transparent glass turntable 1.

[0089] S1. Impeller side profile projection size detection: The impeller 37 moves with the rotating transparent glass turntable 1 until it reaches the impeller side profile projection size detection position. The first vision recognition camera 9 in the impeller side profile projection size detector 5 acquires the side profile projection image of the impeller 37 on the impeller side projection background plate 8. The first vision recognition program module identifies and detects the size of the impeller side profile projection image. The control system determines whether the impeller 37 is an abnormal impeller based on the size of the impeller side profile projection image.

[0090] S2. Blade Quantity and Position Distribution Detection: The impeller 37 continues to move with the rotating transparent glass turntable 1 until it reaches the blade quantity and position distribution detection position. The second vision recognition camera 11 in the blade quantity and position distribution detector 6 acquires the front projection image of the impeller 37 on the impeller front projection background plate 10. The second vision recognition program module identifies and detects the blade quantity and position distribution in the impeller front projection image. The control system determines whether the impeller 37 is an abnormal impeller based on the blade quantity and position distribution.

[0091] S3. Impeller back contour projection size detection: The impeller 37 continues to move with the rotating transparent glass turntable 1 until it reaches the impeller back contour projection size detection position. The third vision recognition camera 14 in the impeller back contour projection size detector 12 acquires the back contour projection image of the impeller 37 on the impeller back projection background plate 13. The third vision recognition program module identifies and detects the size of the impeller back contour projection image. The control system determines whether the impeller 37 is an abnormal impeller based on the size of the impeller back contour projection image.

[0092] S4. Transfer of qualified impellers and rejection of abnormal impellers: For abnormal impellers detected in step S2 or S3, when the abnormal impeller moves with the rotating transparent glass turntable 1 to the abnormal impeller rejection position, the control system drives the rejection cylinder 7 to push the abnormal impeller onto the abnormal impeller belt conveyor 4. The abnormal impeller is then transported to the abnormal impeller collection box by the abnormal impeller belt conveyor 4. The impellers 37 that are not rejected on the transparent glass turntable 1 continue to move with the rotating transparent glass turntable 1 until they reach the discharge side of the transparent glass turntable 1. Under the action of inertial movement, the impellers enter the discharge belt conveyor 3 along the impeller discharge guide rod 24 at the docking point between the transparent glass turntable 1 and the discharge belt conveyor 3. The impellers 37 are then transported to the impeller packaging station for packaging by the discharge belt conveyor 3.

[0093] As a further improvement to this embodiment, the following step is provided between step S3 and step S4:

[0094] S3A, Blade Profile Feature Extraction: The impeller 37 continues to move with the rotating transparent glass turntable 1 until it reaches the blade profile feature extraction position. Before the impeller reaches the blade profile feature extraction position, the control system, based on the blade number and position distribution data obtained in step S2, pre-drives the blade profile feature extractor 30 to move the indexing disk 34 located on the motor shaft of the angle motor 32 in the blade profile feature extractor 30 to the center of the blade profile feature extraction position via the linear guide assembly 31. (This center coincides with the center of the impeller 37 that is about to be reached; the impeller 37 center radius data is obtained by the control system based on the blade profile feature extraction position.) The number and position distribution of blades are measured online by detector 6, and the circumferential angle of the indexing disk 34 on the motor shaft of the angle motor 32 is adjusted in advance so that the circumferential distribution position of the ranging sensor array 35 on the indexing disk 34 matches the circumferential distribution position of the blades obtained in step S2; when the impeller 37 reaches the blade profile feature extraction position, the vertical coordinate data of the corresponding blade profile on the impeller 37 is measured by the ranging sensor array 35 on the indexing disk 34; the control system determines whether the impeller 37 is an abnormal impeller based on the vertical coordinate data of the corresponding blade profile on the impeller 37 measured by the ranging sensor array 35.

[0095] Preferably, an error range can be preset for the impeller side profile projection image size data, impeller back profile projection image size data, and vertical coordinate data of the corresponding blade profile on the impeller. The control system compares the measured impeller data with the standard impeller. If the data exceeds the preset error range, the impeller 37 is determined to be an abnormal impeller.

[0096] Preferably, during the rotation of the transparent glass turntable 1, the control system also activates the positive and negative pressure composite cleaning device 25 to continuously clean the front and back surfaces of the transparent glass turntable 1 using positive and negative pressure composite cleaning. During positive and negative pressure composite cleaning, the air knife 28 located inside the dust collection box 26 blows out compressed air to blow away the dirt adhering to the surface of the transparent glass turntable 1 and seal it inside the cavity of the dust collection box 26. The negative pressure gas inside the dust collection box 26, connected to the negative pressure suction pipe 27, sucks away the dirt. The sucked-away dirt is collected by the dust collector connected to the negative pressure suction pipe 27.

[0097] In this embodiment, the control system pre-stores data such as the size and shape of all impellers produced by the factory. The control system compares the data measured by the impeller side profile projection size detector 5, the blade quantity and position distribution detector 6, the impeller back profile projection size detector 12, and the blade surface feature extractor 30 with the stored data of the impeller 37, and can also identify the specifications and models of abnormal impellers.

[0098] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for preventing impeller mixing in a multi-variety production condition, characterized in that, The device comprises a transparent glass turntable, a feeding belt conveyor butted to the feeding side of the transparent glass turntable, a discharging belt conveyor butted to the discharging side of the transparent glass turntable, an abnormal impeller belt conveyor butted to the side of the transparent glass turntable for receiving abnormal impellers, an impeller side profile projection size detector for detecting the side profile projection size of the impeller on the transparent glass turntable, a blade number and position distribution detector for detecting the number and distribution of blades on the front of the impeller on the transparent glass turntable, and a rejection air cylinder for transferring abnormal impellers from the transparent glass turntable to the abnormal impeller belt conveyor. The impeller side profile projection size detector comprises an impeller side projection background plate vertically arranged on the inner side of the upper part of the transparent glass turntable, and a first visual recognition camera arranged on the upper part of the outer side of the transparent glass turntable and pointing to the impeller side projection background plate from the horizontal direction.

2. A device for preventing impeller mixing in multi-variety production conditions according to claim 1, characterized in that, The blade number and position distribution detector comprises an impeller front projection background plate arranged on the lower part of the transparent glass turntable and pointing upward, and a second visual recognition camera arranged on the upper part of the transparent glass turntable and pointing downward to the impeller front projection background plate. The rejection air cylinder is fixedly arranged on the upper part of the inner side of the transparent glass turntable, and the piston rod of the rejection air cylinder points to the feeding side of the abnormal impeller belt conveyor. The impeller side profile projection size detector, the blade number and position distribution detector, and the rejection air cylinder are sequentially arranged according to the moving direction of the impeller on the transparent glass turntable. The device further comprises a rack and a stepping motor arranged on the rack, a connecting disc is arranged on the motor shaft of the stepping motor, and the transparent glass turntable is fixed on the connecting disc. The device further comprises a blade profile feature extractor for extracting the blade profile feature data of the front of the impeller. The blade profile feature extractor comprises a linear guide rail assembly fixed on the rack and arranged on the upper part of the transparent glass turntable, a corner motor movably arranged on the linear guide rail assembly, a protractor disc arranged on the motor shaft of the corner motor, and a distance measuring sensor array arranged on the protractor disc. The distance measuring sensor array comprises a plurality of infrared distance measuring sensors arranged on the protractor disc and arranged in a circumferential array, and the distance measuring direction of the infrared distance measuring sensors points downward to the front of the impeller on the transparent glass turntable. The device further comprises an impeller back profile projection size detector for detecting the back profile projection size of the impeller on the transparent glass turntable. The impeller back profile projection size detector comprises an impeller back projection background plate arranged on the upper part of the transparent glass turntable and pointing downward, and a third visual recognition camera arranged on the lower part of the transparent glass turntable and pointing upward to the impeller back projection background plate. The impeller side profile projection size detector, the blade number and position distribution detector, the impeller back profile projection size detector, and the rejection air cylinder are sequentially arranged according to the moving direction of the impeller on the transparent glass turntable.

3. A device for preventing impeller mixing in multi-variety production conditions according to claim 2, characterized in that, The lens periphery of the first visual recognition camera is provided with a first annular illumination light source, and the first annular illumination light source projects a background plate towards the impeller side; the lens periphery of the second visual recognition camera is provided with a second annular illumination light source, and the second annular illumination light source projects a background plate towards the impeller front; the lens periphery of the third visual recognition camera is provided with a third annular illumination light source, and the third annular illumination light source projects a background plate towards the impeller back.

4. A device for preventing impeller mixing in multi-variety production conditions according to claim 1, characterized in that, An impeller feeding guide rod is arranged at the feeding side of the transparent glass turntable and horizontally and obliquely crosses above the feeding belt conveyor; an impeller discharging guide rod is arranged at the discharging side of the transparent glass turntable and horizontally and obliquely crosses above the discharging belt conveyor.

5. A device for preventing impeller mixing in multi-variety production conditions according to claim 1, characterized in that, A positive and negative pressure composite cleaning device for maintaining the cleanliness of the surface of the transparent glass turntable is further arranged, which comprises a dust removal box cover arranged at the composite cleaning position of the transparent glass turntable and covering the front and back surfaces of the transparent glass turntable, a negative pressure dust cleaner connected to the inner cavity of the dust removal box cover through a negative pressure dust collection pipeline, an air knife arranged inside the dust removal box cover and having an air outlet close to the surface of the transparent glass turntable, and a compressed air source connected to the air knife through a compressed air pipeline.

6. A device for preventing impeller mixing in multi-variety production conditions according to claim 1, characterized in that, The feeding belt conveyor, the discharging belt conveyor, the abnormal impeller belt conveyor, the rejecting cylinder, the first visual recognition camera, the second visual recognition camera, the third visual recognition camera, the stepping motor, the angle motor and the distance measuring sensor array are respectively connected to a control system, and the control system is respectively provided with a first visual recognition program module for identifying and extracting the shape and size data of the side profile projection image of the impeller, a second visual recognition program module for identifying and extracting the shape and size data of the front profile projection image of the impeller and the front blade number distribution data, and a third visual recognition program module for identifying and extracting the shape and size data of the back profile projection image of the impeller.

7. A method of preventing mixing of impellers in a multi-variety production condition using the impeller mixing prevention device according to any one of claims 1 to 6, characterized by, The method comprises the following steps: S0, impeller conveying: the impeller is conveyed to the transparent glass turntable by the feeding belt conveyor until reaching the feeding side of the transparent glass turntable, and the impeller enters the transparent glass turntable along the impeller feeding guide rod at the joint of the feeding belt conveyor and the transparent glass turntable under the action of inertial movement; S1, impeller side profile projection size detection: the impeller moves with the rotating transparent glass turntable until reaching the impeller side profile projection size detection position, the side profile projection image of the impeller on the side projection background plate is acquired by the first visual recognition camera in the impeller side profile projection size detector, the size of the impeller side profile projection image is identified and detected by the first visual recognition program module, and the control system determines whether the impeller is an abnormal impeller according to the size of the impeller side profile projection image; S2, blade quantity and position distribution detection: the impeller continues to move with the rotating transparent glass turntable until it reaches the blade quantity and position distribution detection position, the front projection image of the impeller on the front projection background plate is obtained by the second visual recognition camera in the blade quantity and position distribution detector, the number and position distribution of the blades in the front projection image of the impeller are recognized and detected by the second visual recognition program module, and the control system judges whether the impeller is an abnormal impeller according to the number and position distribution of the blades; S3, impeller back profile projection size detection: the impeller continues to move with the rotating transparent glass turntable until it reaches the impeller back profile projection size detection position, the back profile projection image of the impeller on the back profile projection background plate is obtained by the third visual recognition camera in the impeller back profile projection size detector, the size of the back profile projection image of the impeller is recognized and detected by the third visual recognition program module, and the control system judges whether the impeller is an abnormal impeller according to the size of the back profile projection image of the impeller; S4, qualified impeller transfer and abnormal impeller rejection: for the abnormal impeller detected in step S2 or step S3, when the abnormal impeller moves to the abnormal impeller rejection position with the rotating transparent glass turntable, the control system drives the rejection cylinder to act, pushes the abnormal impeller to the abnormal impeller belt conveyor, and the abnormal impeller is conveyed to the abnormal impeller collection frame through the abnormal impeller belt conveyor; the un-rejected impeller on the transparent glass turntable continues to move with the rotating transparent glass turntable until it reaches the discharge side position of the transparent glass turntable, and the impeller enters the discharge belt conveyor along the impeller discharge guide rod at the joint of the transparent glass turntable and the discharge belt conveyor under the action of inertia movement; the impeller is conveyed to the impeller packaging station for packaging through the discharge belt conveyor.

8. A method of preventing mixing of materials in a device for preventing mixing of materials in a multi-variety production condition according to claim 7, characterized in that, Between the steps S3 and S4, the following step is also provided: S3A, blade profile feature extraction: the impeller continues to move with the rotating transparent glass turntable until it reaches the blade profile feature extraction position; wherein, before the impeller reaches the blade profile feature extraction position, the control system drives the blade profile feature extractor to act in advance according to the blade quantity and position distribution data obtained in step S2, moves the index plate on the motor shaft of the blade profile feature extractor to the center of the blade profile feature extraction position through the linear guide assembly in advance, and opens the corner motor to adjust the circumferential angle of the index plate on the motor shaft of the corner motor in advance, so that the circumferential distribution position of the distance sensor array on the index plate is adapted to the circumferential distribution position of the blades obtained in step S2; when the impeller reaches the blade profile feature extraction position, the vertical coordinate data of the corresponding blade profile on the impeller is measured by the distance sensor array on the index plate; the control system judges whether the impeller is an abnormal impeller according to the vertical coordinate data of the corresponding blade profile on the impeller measured by the distance sensor array.

Images