Turbine shell surface defect visual inspection device

Abstract

The utility model relates to the field of industrial automatic detection, and discloses a turbine shell surface defect visual detection device which comprises a detection chamber and a controller, a workbench, an industrial camera and a light-emitting panel are arranged in the detection chamber, a fixed seat is rotationally arranged on the workbench, and a placement groove corresponding to a turbine shell to be detected is formed in the top of the fixed seat; a driving mechanism for driving the fixing base to rotate is arranged on the portion, located on one side of the fixing base, of the workbench, a plurality of positioning columns are distributed on the top wall, close to the outer ring, of the fixing base in the circumferential direction, and the driving mechanism comprises a shifting rod for pushing the positioning columns to move in the rotating process and a motor for driving the shifting rod to rotate; the deflector rod pushes one positioning column to rotate around the circle center of the fixing base by a certain angle. The turbine shell surface defect detection method has the effect of improving the comprehensiveness and precision of turbine shell surface defect detection.

Description

Technical Field

[0001] The present application relates to the field of industrial automation detection, and in particular to a visual detection device for turbine casing surface defects. Background Art

[0002] At present, surface defect detection of complex curved parts such as turbine shells mainly relies on manual visual inspection, which has problems such as low efficiency, poor accuracy, and high labor intensity. With the development of machine vision technology, some companies have begun to try to use machine vision systems for surface defect detection, but due to factors such as the complex surface shape of the turbine shell, strong reflection, and various types of defects, the detection effect of the existing machine vision system is not ideal.

[0003] In the prior art, machine vision systems usually use a camera at a fixed position to take pictures of the turbine casing, and then analyze the pictures through image processing algorithms to identify surface defects. However, due to the fixed position of the camera, it is impossible to fully cover all surfaces of the turbine casing, and it is easily affected by factors such as lighting conditions and surface reflections, resulting in missed detection or false detection. Utility Model Content

[0004] In order to improve the comprehensiveness and accuracy of turbine casing surface defect detection, the present application provides a turbine casing surface defect visual detection device.

[0005] The present application provides a turbine casing surface defect visual detection device that adopts the following technical solution:

[0006] A visual inspection device for turbine shell surface defects comprises an inspection chamber and a controller, wherein a workbench, an industrial camera and a light-emitting panel are arranged in the inspection chamber, a fixed seat is rotatably arranged on the workbench, and a placement groove is provided on the top of the fixed seat corresponding to the turbine shell to be inspected, a driving mechanism for driving the fixed seat to rotate is arranged on one side of the workbench located on the fixed seat, a plurality of positioning posts are arranged along the circumference on the top wall of the fixed seat close to the outer ring, the driving mechanism comprises a lever for pushing the positioning posts to move during rotation and a motor for driving the lever to rotate, and each time the lever rotates one circle, the lever pushes one of the positioning posts to rotate around the center of the fixed seat by a certain angle.

[0007] By adopting the above technical solution, the staff enters the inspection room and places the turbine shell with surface defects to be inspected in the placement slot on the fixed seat, and then leaves the inspection room, controls the lighting of the light panel through the controller, and starts the industrial camera to collect images of one side of the turbine shell with surface defects to be inspected, and drives the motor to work during the collection process. The motor drives the lever to rotate. Every time the lever rotates one circle, it pushes one of the positioning columns to rotate around the center of the fixed seat by a certain angle, and in the process of the lever turning away from the positioning column, the fixed seat is in a stationary state. At this time, the industrial camera can stably collect images of the surface defects of the turbine shell. The intermittent rotation of the fixed seat not only improves the stability of the industrial camera in collecting images of the turbine shell surface, but also improves the comprehensiveness of the detection of surface defects of the turbine shell and the accuracy of the detection results.

[0008] Optionally, a sleeve is sleeved on the output shaft of the motor extending out of the top of the workbench, the shift rod is perpendicular to the axial direction of the sleeve and is arranged on the side wall of the sleeve, a connecting plate is arranged on the top of the sleeve perpendicular to the axial direction of the sleeve, and the connecting plate does not interfere with the positioning column during rotation, and the bottom of the rod end of the connecting plate is commonly connected with an incomplete limit ring, and the shift rod is located at the notch of the incomplete limit ring. In the process of the shift rod pushing one of the positioning columns to rotate a certain angle around the center of the fixed seat and away from the positioning column, the incomplete limit ring is inserted into the space above the fixed seat from the gap between the two positioning columns, and is inserted out of the space above the fixed seat from the adjacent gap. At this time, the outer wall of the incomplete limit ring interferes with the side walls of the two intermediate positioning columns.

[0009] By adopting the above technical solution, during the operation of the motor, the output shaft of the motor rotates to drive the sleeve to rotate synchronously, and the rotation of the sleeve drives the lever to rotate synchronously. During the rotation of the lever, one of the positioning posts is pushed to rotate around the center of the fixed seat by a certain angle, and then rotates away from the positioning post. During this process, the incomplete limit ring is inserted into the fixed seat from the gap between the two positioning posts, and the fixed seat is inserted out from the gap between the two adjacent positioning posts. When the lever is away from the fixed seat, the outer wall of the incomplete limit ring contacts the side walls of the two intermediate positioning posts. The setting of the incomplete limit ring improves the stability of the industrial camera in collecting images of the turbine shell surface.

[0010] Optionally, a guiding slope is provided on the end of the incomplete limiting ring inserted into the gap between two adjacent positioning columns.

[0011] By adopting the above technical solution, the setting of the guiding bevel improves the convenience of inserting the incomplete limiting ring into the fixing seat from the gap between the two positioning columns, reduces the rigidity of the end of the incomplete limiting ring against the side wall of the positioning column, and reduces the possibility of damage between the incomplete limiting ring and the positioning column due to the conflict.

[0012] Optionally, a reinforcing rib is provided at the connection between the lever and the side wall of the sleeve.

[0013] By adopting the above technical solution, the provision of the reinforcing ribs enhances the stability of the connection between the lever and the side wall of the sleeve.

[0014] Optionally, each of the positioning columns includes a pillar vertically arranged on a fixing seat and a swivel slidably sleeved on the pillar, and the top of each of the pillars is threadedly connected to an end cap.

[0015] By adopting the above technical solution, the rotational coordination between the swivel and the pillar reduces the friction force generated by the lever pushing the swivel, thereby reducing the possibility of damage between the lever and the positioning column due to interference, improving the stability of the lever and the positioning column, and through the threaded connection between the end cover and the pillar, when the swivel is worn, the convenience of replacing the swivel is improved.

[0016] Optionally, a rotating shaft is provided at the bottom of the fixed seat, and the rotating shaft rotatably passes through the workbench and extends to the bottom of the workbench. A limiting member is provided between the workbench and the fixed seat, and the limiting member includes a ratchet fixedly mounted on the rotating shaft and a pawl plugged into and engaged with the ratchet. A support rod is provided at the bottom of the workbench, and the pawl rotatably mounts on the support rod. A spring is connected between the workbench and the tip of the pawl.

[0017] By adopting the above technical solution, the plug-in cooperation of the ratchet pawl can make the fixed seat rotate only in one direction, and each time the pawl is inserted between the two ratchet teeth on the ratchet wheel, it will have a limiting effect, further improving the stability of the industrial camera in capturing images of the turbine shell surface.

[0018] Optionally, a plurality of balls are embedded in the bottom of the fixing seat along the circumferential direction, and the plurality of balls are in contact with the workbench.

[0019] By adopting the above technical solution and setting a plurality of balls, the friction force generated by the rotation between the fixed seat and the workbench can be reduced, thereby reducing the resistance of the lever pushing the positioning column, making the rotation of the fixed seat smoother.

[0020] Optionally, the detection chamber includes a supporting frame and a plurality of shading plates arranged on the supporting frame, and the light-emitting panel is mounted on the shading plates, and the light source is aligned with the placement groove.

[0021] By adopting the above technical solution, a light-proof environment is set up in the detection room to prevent ambient light from interfering with the interior of the detection room. At the same time, by installing multiple light-emitting panels on the shading plate, shadowless light is generated, which is conducive to the industrial camera to take clear pictures of the turbine shell surface.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The staff enters the inspection room and places the turbine shell with surface defects to be inspected in the placement slot on the fixed seat, then leaves the inspection room, controls the lighting of the light panel through the controller, and starts the industrial camera to collect images of one side of the turbine shell with surface defects to be inspected, and drives the motor to work during the collection process. The motor drives the lever to rotate, and each rotation of the lever will push one of the positioning columns to rotate a certain angle around the center of the fixed seat, and in the process of the lever turning away from the positioning column, the fixed seat is in a stationary state. At this time, the industrial camera can stably collect images of the surface defects of the turbine shell. The intermittent rotation of the fixed seat not only improves the stability of the industrial camera in capturing images of the turbine shell surface, but also improves the comprehensiveness of the detection of surface defects of the turbine shell and the accuracy of the detection results;

[0024] 2. During the operation of the motor, the output shaft of the motor rotates to drive the sleeve to rotate synchronously, and the rotation of the sleeve drives the lever to rotate synchronously. During the rotation of the lever, it pushes one of the positioning posts to rotate around the center of the fixed seat by a certain angle, and then turns away from the positioning post. During this process, the incomplete limit ring is inserted into the fixed seat from the gap between the two positioning posts, and the fixed seat is inserted out from the gap between the two adjacent positioning posts. When the lever is away from the fixed seat, the outer wall of the incomplete limit ring contacts the side walls of the two intermediate positioning posts. The setting of the incomplete limit ring improves the stability of the industrial camera in capturing images of the turbine shell surface;

[0025] 3. The setting of the guiding slope improves the convenience of inserting the incomplete limiting ring into the fixing seat from the gap between the two positioning columns, reduces the rigidity of the end of the incomplete limiting ring against the side wall of the positioning column, and reduces the possibility of damage caused by the incomplete limiting ring and the positioning column due to the conflict. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the lever, the incomplete limiting ring and the positioning column in the embodiment of the present application.

[0028] Figure 3 It is a cross-sectional view of a plurality of balls at the bottom of the fixing seat in the embodiment of the present application.

[0029] Figure 4 It is a schematic diagram of the position relationship between the ratchet and the pawl on the workbench in the embodiment of the present application.

[0030] Description of reference numerals:

[0031] 01. Turbine casing to be inspected; 1. Inspection chamber; 11. Support frame; 12. Sunshade; 2. Controller; 3. Workbench; 31. Support rod; 4. Industrial camera; 5. Light-emitting panel; 6. Fixed seat; 61. Placement slot; 62. Positioning column; 621. Pillar; 622. Swivel; 623. End cover; 63. Rotating shaft; 64. Bearing; 65. Ball; 7. Driving mechanism; 71. Push rod; 711. Reinforcement rib; 72. Motor; 8. Sleeve; 81. Connecting plate; 811. Incomplete limit ring; 9. Limiting piece; 91. Ratchet; 92. Pawl; 921. Spring. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] An embodiment of the present application discloses a device for visually inspecting surface defects of a turbine casing.

[0034] Reference Figure 1 and Figure 2 A visual inspection device for turbine shell surface defects includes an inspection chamber 1 and a controller 2. The inspection chamber 1 is surrounded by a support frame 11 and a plurality of shading plates 12. A workbench 3, an industrial camera 4 and a light-emitting panel 5 are fixedly arranged in the inspection chamber 1. The workbench 3 is located in the center of the inspection chamber 1, and a fixed seat 6 is rotatably arranged on the workbench 3. A driving mechanism 7 for driving the fixed seat 6 to rotate is also arranged on the workbench 3. A placement groove 61 is provided on the top of the fixed seat 6 to match the front and back sides of the turbine shell 01 to be inspected. The industrial camera 4 is suspended and installed above the placement groove 61, and the light source of the light-emitting panel 5 is aligned with the placement groove 61 and installed on the shading plate 12. The controller 2 is located outside the inspection chamber 1, and the industrial camera 4 and the light-emitting panel 5 are both electrically connected to the controller 2.

[0035] Reference Figure 1 and Figure 2 The staff enters the inspection room 1 and places the turbine shell 01 to be inspected in the placement groove 61 on the fixed seat 6, and then leaves the inspection room 1, controls the lighting of the light-emitting panel 5 through the controller 2, and starts the industrial camera to collect images of one side of the turbine shell 01 to be inspected, and during the collection process, the fixed seat 6 is driven to rotate intermittently through the driving mechanism 7, so that the industrial camera can collect all-round images of the surface of the turbine shell 01 to be inspected.

[0036] Reference Figure 2 and Figure 3A plurality of positioning posts 62 are arranged along the circumference on the top wall of the fixed seat 6 close to the outer ring. In this embodiment, ten positioning posts 62 are taken as an example. Each positioning post 62 includes a pillar 621 and a swivel 622. Each pillar 621 is arranged vertically, and the bottom end of the pillar 621 is fixedly arranged on the fixed seat 6. The swivel 622 is slidably sleeved on the pillar 621, and the top of each pillar 621 is threadedly connected with an end cover 623.

[0037] Reference Figure 2 and Figure 3 A rotating shaft 63 is fixedly arranged at the bottom of the fixed seat 6, and the rotating shaft 63 rotates through the workbench 3 and extends to the bottom of the workbench 3, and a bearing 64 is fixedly sleeved between the rotating shaft 63 and the workbench 3. A plurality of balls 65 are also embedded on the bottom wall of the fixed seat 6, and the plurality of balls 65 are all against the workbench 3.

[0038] Reference Figure 2 and Figure 3 The driving mechanism 7 includes a lever 71 and a motor 72. The motor 72 is fixedly arranged on the bottom wall of the workbench 3, and its output shaft rotates vertically through the workbench 3 and extends out of the top of the workbench 3. A sleeve 8 is fixedly sleeved on the output shaft of the motor 72 extending out of the top of the workbench 3, and the lever 71 is perpendicular to the axial direction of the sleeve 8 and fixedly arranged on the side wall of the sleeve 8, and a reinforcing rib 711 is fixedly arranged at the connection between the lever 71 and the side wall of the sleeve 8.

[0039] Reference Figure 2 A connecting plate 81 is integrally formed at the top of the sleeve 8 perpendicular to the axial direction of the sleeve 8, and the bottom of the rod end of the connecting plate 81 is commonly connected to an incomplete limiting ring 811. The end of the incomplete limiting ring 811 inserted into the gap between two adjacent positioning columns 62 is provided with a guiding inclined surface, and the shift rod 71 is located at the notch of the incomplete limiting ring 811.

[0040] Reference Figure 1 , Figure 2 and Figure 3 , the motor 72 is driven to work by the controller 2, and the motor 72 drives the lever 71 to rotate. Each time the lever 71 rotates one circle, it pushes one of the positioning posts 62 to rotate a certain angle around the center of the fixed seat 6. In the process of the lever 71 turning away from the positioning post 62, the incomplete limit ring 811 is inserted into the fixed seat 6 from the gap between the two positioning posts 62, and the fixed seat 6 is inserted from the gap between the two adjacent positioning posts 62. When the lever 71 is away from the fixed seat 6, the outer wall of the incomplete limit ring 811 contacts the side walls of the two intermediate positioning posts 62. When the fixed seat 6 is in a stationary state, the industrial camera can perform stable image acquisition of the surface defects of the turbine shell 01 to be detected.

[0041] Reference Figure 2 , Figure 3 and Figure 4 In order to improve the stability of the turbine shell 01 to be detected during the image acquisition process, a limiting member 9 is arranged between the workbench 3 and the fixed seat 6, and the limiting member 9 includes a ratchet 91 and a pawl 92. The ratchet 91 is fixedly sleeved on the rotating shaft 63 located at the bottom of the workbench 3, and a support rod 31 is fixedly arranged at the bottom of the workbench 3 in the vertical direction. The pawl 92 is rotatably sleeved on the support rod 31, and the tip of the pawl 92 away from the support rod 31 is inserted between the two ratchet teeth on the ratchet 91, and a spring 921 is abutted between the workbench 3 and the tip of the pawl 92.

[0042] The implementation principle of a visual inspection device for turbine shell surface defects in an embodiment of the present application is as follows: a staff member enters the inspection room 1, and places the turbine shell 01 to be inspected in the placement groove 61 on the fixing seat 6, and then leaves the inspection room 1, controls the lighting of the light-emitting panel 5 through the controller 2, and starts the industrial camera to capture images of one side of the turbine shell 01 to be inspected.

[0043] During the acquisition process, the motor 72 is driven to work, and the motor 72 drives the lever 71 to rotate. Each time the lever 71 rotates one circle, it pushes one of the positioning posts 62 to rotate a certain angle around the center of the fixed seat 6. In the process of the lever 71 turning away from the positioning post 62, the incomplete limit ring 811 is inserted into the fixed seat 6 from the gap between the two positioning posts 62, and the fixed seat 6 is inserted from the gap between the two adjacent positioning posts 62. When the lever 71 is away from the fixed seat 6, the outer wall of the incomplete limit ring 811 abuts against the side walls of the two intermediate positioning posts 62. At this time, the fixed seat 6 is in a stationary state, and the industrial camera can perform stable image acquisition of the surface defects of the turbine shell 01 to be inspected.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A turbine casing surface defect visual inspection device, comprising an inspection chamber (1) and a controller (2), wherein a workbench (3), an industrial camera (4) and a light-emitting panel (5) are arranged in the inspection chamber (1), characterized in that: A fixed seat (6) is rotatably arranged on the workbench (3), and a placement groove (61) is provided on the top of the fixed seat (6) corresponding to the turbine shell (01) to be tested. A driving mechanism (7) for driving the fixed seat (6) to rotate is arranged on one side of the workbench (3) located on the fixed seat (6). A plurality of positioning columns (62) are arranged along the circumference on the top wall of the fixed seat (6) close to the outer ring. The driving mechanism (7) includes a lever (71) for pushing the positioning columns (62) to move during rotation and a motor (72) for driving the lever (71) to rotate. Whenever the lever (71) rotates one circle, the lever (71) pushes one of the positioning columns (62) to rotate around the center of the fixed seat (6) by a certain angle.

2. A turbine casing surface defect visual inspection device according to claim 1, characterized in that: The output shaft of the motor (72) extending out of the top of the workbench (3) is sleeved with a sleeve (8); the shifting rod (71) is perpendicular to the axial direction of the sleeve (8) and is arranged on the side wall of the sleeve (8); the top of the sleeve (8) is perpendicular to the axial direction of the sleeve (8) and is provided with a connecting plate (81); the bottom of the rod end of the connecting plate (81) is commonly connected with an incomplete limiting ring (811); the shifting rod (71) is located at the notch of the incomplete limiting ring (811); ) pushes one of the positioning posts (62) to rotate a certain angle around the center of the fixed seat (6) and away from the positioning post (62), the incomplete limiting ring (811) is inserted into the fixed seat (6) from the gap between the two positioning posts (62), and the fixed seat (6) is inserted out from the gap between two adjacent positioning posts (62); when the shifting rod (71) is away from the fixed seat (6), the outer wall of the incomplete limiting ring (811) abuts against the side walls of the two intermediate positioning posts (62).

3. A turbine casing surface defect visual inspection device according to claim 2, characterized in that: A guiding inclined surface is provided at the end of the incomplete limiting ring (811) inserted into the gap between two adjacent positioning pillars (62).

4. A turbine casing surface defect visual inspection device according to claim 2, characterized in that: A reinforcing rib (711) is provided at the connection between the shifting rod (71) and the side wall of the sleeve (8).

5. The visual inspection device for turbine casing surface defects according to claim 1, characterized in that: Each of the positioning columns (62) comprises a support column (621) vertically arranged on a fixing seat (6) and a swivel (622) slidably sleeved on the support column (621), and the top of each of the support columns (621) is connected to an end cover (623) via threads.

6. A turbine casing surface defect visual inspection device according to claim 1, characterized in that: A rotating shaft (63) is arranged at the bottom of the fixed seat (6), and the rotating shaft (63) is rotatably arranged through the workbench (3) and extends to the bottom of the workbench (3). A limiting member (9) is arranged between the workbench (3) and the fixed seat (6), and the limiting member (9) comprises a ratchet (91) fixedly sleeved on the rotating shaft (63) and a ratchet pawl (92) plugged into and matched with the ratchet (91). A supporting rod (31) is arranged at the bottom of the workbench (3), and the ratchet pawl (92) is rotatably sleeved on the supporting rod (31). A spring (921) is connected between the workbench (3) and the tip of the ratchet pawl (92).

7. A turbine casing surface defect visual inspection device according to claim 6, characterized in that: A plurality of balls (65) are embedded in the bottom of the fixing seat (6) along the circumferential direction, and the plurality of balls (65) are in contact with the workbench (3).

8. A turbine casing surface defect visual inspection device according to claim 1, characterized in that: The detection chamber (1) comprises a support frame (11) and a plurality of shading plates (12) arranged on the support frame (11), and the light-emitting panel (5) is mounted on the shading plates (12), and the light source is aligned with the placement groove (61).

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