An automated visual inspection device for pipe fitting production lines

Abstract

This application relates to the field of pipe fitting inspection technology, and in particular to an automated visual inspection device for pipe fitting production lines. The device includes a frame with a base plate on one side. A sliding plate is slidably mounted on the base plate, and a clamping component is mounted on the sliding plate on one side. Multiple evenly distributed uprights are arranged on the frame, with one upright on one side mounted on the sliding plate. Clamping components are mounted on each of the uprights. Each clamping component includes a support plate mounted on an upright, with a V-shaped groove on the support plate. A connecting frame, L-shaped in shape, is mounted on one side of the support plate, and a guide rod passes through the connecting frame. The guide rod is located on a pressure plate directly above the support plate. The device uses a downward-pressing cylinder to push the pressure plate downward, forming an annular clamping space between the V-shaped pressure groove and the V-shaped support groove. The self-centering effect of the V-shaped surface ensures the position of the pipe fitting axis. The coordinated force from multiple clamping points evenly distributes the weight of the pipe fitting to each support point, effectively suppressing bending deformation of long pipe fittings.

Description

Technical Field

[0001] This application relates to the field of pipe fitting inspection technology, and in particular to an automated visual inspection device for pipe fitting production lines. Background Technology

[0002] Pipe fittings are pipe accessories used to connect, change direction, divert, or regulate the flow and pressure of fluids in a pipeline system, and are an important component of the pipeline system. As a key component in fluid transport systems, pipe fittings are widely used in many industrial fields such as petrochemicals, power, shipbuilding, building water supply and drainage, heating and ventilation. The quality and precision of pipe fittings directly affect the safety and reliability of the entire pipeline system.

[0003] A pipe fitting production line is an automated manufacturing system specifically designed for the mass production of various pipe fittings, typically consisting of multiple process stages. A typical pipe fitting production line includes major processes such as material preparation, cutting and blanking, forming, welding, heat treatment, surface treatment, and quality inspection. For example, a pipe fitting inspection device, as described in application number CN202410459617.3, relates to the field of pipe fitting inspection technology. This prior art includes a support frame, a drive mechanism, a mounting rod, a laser sensor, and a controller. The drive mechanism is mounted on the support frame and connected to the mounting rod. The laser sensor is mounted on the mounting rod and electrically connected to the controller. The drive mechanism drives the mounting rod to extend axially into the pipe fitting, and the laser sensor scans the internal contour of the pipe fitting and sends the obtained contour data to the controller. The controller calculates the internal dimensions of the pipe fitting based on the contour data. Compared to existing technologies, the pipe fitting inspection device, due to its drive mechanism connected to the mounting rod and the laser sensor electrically connected to the controller, can quickly achieve pipe fitting dimension inspection, has a high degree of mechanization, saves time and labor costs, and offers high inspection efficiency and accuracy.

[0004] However, the aforementioned existing technologies still have some shortcomings when it comes to inspecting pipe fittings:

[0005] The aforementioned existing pipe fitting inspection device uses a V-shaped limiting arm to clamp the middle of the pipe fitting, and a drive mechanism to drive a laser sensor to scan the inner wall axially to achieve inspection. However, in practical applications, when inspecting long pipe fittings, the following problems exist: the limiting arm only clamps the middle of the pipe fitting, leaving both ends suspended in the air. Under the influence of gravity, the ends of the long pipe fitting are prone to drooping or bending, causing the pipe fitting axis to deviate. This results in the laser sensor scanning path deviating from the ideal straight line, affecting the integrity of the inner wall contour data acquisition; the limiting arm fixes the axial position of the pipe fitting through a V-shaped structure.

[0006] In addition, laser scanning technology is mainly based on the principle of structured light triangulation or laser profilometry. It constructs three-dimensional topographic data by projecting laser stripes onto the surface of the pipe and capturing the reflected light. It relies on surface deformation features to identify defects. However, leakage is essentially the process of fluid permeation through microscopic channels, which belongs to different physical dimensions. Laser scanning can only provide geometric data and cannot directly correlate with the actual leakage rate. Therefore, laser scanning is suitable for detecting macroscopic geometric defects, but it lacks the ability to directly detect microscopic leakage channels.

[0007] Based on this, and given the above viewpoints, there is still room for improvement in existing technologies for inspecting pipe fittings. Utility Model Content

[0008] To address the aforementioned technical problems, this application provides an automated visual inspection device for pipe fitting production lines, employing the following technical solution:

[0009] An automated visual inspection device for a pipe fitting production line includes a frame, a base plate on one side of the frame, a sliding plate on the base plate, and a clamping component on one side of the base plate; a plurality of evenly distributed uprights on the frame, with one upright on one side of the frame mounted on the sliding plate, and clamping components mounted on each of the uprights.

[0010] The clamping component includes a support plate mounted on the upright, a V-shaped groove on the support plate, a connecting frame on one side of the support plate, and an L-shaped connecting frame with a guide rod passing through it. The guide rod is located on a pressure plate directly above the support plate.

[0011] Preferably, the clamping component also includes a pressing cylinder mounted on the connecting frame, the telescopic end of the pressing cylinder slidingly passing through the connecting frame and connecting with the pressure plate, and the pressure plate having a V-shaped pressing groove corresponding to the V-shaped bracket groove.

[0012] Preferably, the frame is provided with lifting components located between two adjacent uprights;

[0013] The lifting component includes a lifting frame between two adjacent uprights. The lifting frame is U-shaped, and symmetrically distributed guide rods slide through the lifting frame. A crossbar is provided at the upper end of the two guide rods.

[0014] The lifting frame is equipped with a lifting cylinder, and the telescopic end of the lifting cylinder slides through the lifting frame and connects to the crossbar.

[0015] Preferably, a V-shaped plate is provided on the crossbar.

[0016] Preferably, a detector is provided on one side of the clamping member on the frame;

[0017] The detector includes a sliding guide rail on one side of the frame, a sliding plate slidably mounted on the sliding guide rail, a support frame mounted on the sliding plate, and the support frame is U-shaped with an opening in the middle.

[0018] Preferably, the center of the opening area is aligned with the V-shaped bracket.

[0019] Preferably, multiple industrial cameras are installed in the opening area, with the multiple industrial cameras facing the center of the opening area.

[0020] Preferably, pressure detection components are symmetrically arranged on the uprights on both sides;

[0021] The pressurization testing component includes support plates symmetrically arranged on two uprights. The support plates have sliding grooves, and sliding support rods are slidably arranged in the sliding grooves. A connecting cylinder is arranged on the sliding support rod, and a water inlet pipe is slidably inserted through the connecting cylinder. A guide plug is provided at one end of the water inlet pipe.

[0022] Preferably, one end of the guide plug is provided with a guide slope, and the guide plug is provided with a water inlet hole that communicates with the water inlet pipe;

[0023] A return spring is provided between the guide plug and one end of the connecting cylinder, and the return spring is sleeved on the water inlet pipe.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The present invention uses a downward pressing cylinder to push the pressure plate downward, so that the V-shaped pressing groove and the V-shaped support groove form an annular clamping space. The self-centering effect of the V-shaped surface ensures the position of the pipe axis. The multiple clamping points work together to distribute the weight of the pipe evenly to each support point, effectively suppressing the bending deformation of long pipes.

[0026] 2. In this utility model, the downward pressing cylinder lifts and moves the pressure plate away from the pipe, thereby releasing the clamping of the pipe. However, the downward pressing cylinder on the slide plate will continue to push the pressure plate to clamp the pipe. Then, by driving the slide plate to move, the clamping position of the pipe is misaligned. Subsequently, the sliding plate drives the support frame to move from one end of the pipe to the other end. Multiple industrial camera lenses are all facing the center of the opening area to perform all-round scanning and inspection of the outside of the pipe. This achieves unobstructed, all-round, and high-precision visual inspection of the outside of the pipe, effectively solving the problem of the limitation of the inspection line of sight by the traditional clamping structure.

[0027] 3. The guide plugs at both ends of this utility model seal both ends of the pipe fitting, forming an independent and sealed space inside the pipe fitting. Then, water is injected into the pipe fitting through the inlet pipe. The water flows into the sealed pipe fitting through the inlet hole on the guide plug that is connected to the inlet pipe. The water injection and pressure test is performed to ensure that the pipe fitting does not leak under high pressure. The water injection test can detect micro-cracks or leaks in the pipe and prevent failures.

[0028] In addition, in the initial stage, the water flow pushes the water-blocking plug to compress the spring and open the water-blocking ring, allowing water to flow into the pipe. When the pressure inside the pipe is equal to the water injection pressure, the spring's restoring force pushes the water-blocking plug to move in the opposite direction and close the channel, forming a mechanical automatic cut-off. Thus, the pressure of the pipe can be changed by adjusting the elasticity of the spring. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model.

[0030] Figure 2 This is a schematic diagram of the structure between the clamping component and the lifting component of this utility model.

[0031] Figure 3 This is a schematic diagram of the structure between the base plate and the clamping component of this utility model.

[0032] Figure 4 This is a schematic diagram of the structure of the drill clamping component of this utility model.

[0033] Figure 5 This is a structural schematic diagram of the lifting component of this utility model.

[0034] Figure 6 This is a schematic diagram of the detector of this utility model.

[0035] Figure 7 This is a schematic diagram of the structure between the support frame and the industrial camera of this utility model.

[0036] Figure 8 This is a structural diagram of the skateboard, clamping component, and pressure detection component of this utility model.

[0037] Figure 9 This is a structural diagram of the clamping component and the pressure detection component of this utility model.

[0038] Figure 10 This is a cross-sectional view of the pressure boosting detection component of this utility model.

[0039] Figure 11 This is a cross-sectional view of the pressure control component of this utility model.

[0040] Explanation of reference numerals in the attached drawings: 1. Pipe fitting; 2. Frame; 21. Base plate; 22. Slide plate; 3. Upright pole; 4. Clamping component; 41. Support plate; 42. V-groove; 43. Connecting frame; 44. Guide rod; 45. Pressure plate; 46. Downward pressure cylinder; 47. V-groove; 5. Lifting component; 51. Lifting frame; 52. Guide rod; 53. Crossbar; 54. Lifting cylinder; 55. V-plate; 6. Detector; 61. Sliding guide rail; 6 2. Sliding plate; 63. Support frame; 64. Opening area; 65. Industrial camera; 7. Pressure boosting detection component; 71. Support plate; 72. Sliding groove; 73. Sliding strut; 74. Connecting cylinder; 75. Water inlet pipe; 76. Guide plug; 77. Guide slope; 78. Water inlet hole; 79. Return spring; 8. Pressure control component; 81. Water blocking ring; 82. Adjusting screw; 83. Stop block; 84. Water blocking plug; 85. Pressing spring. Detailed Implementation

[0041] The following is in conjunction with the appendix Figures 1 to 11 This application will be described in further detail.

[0042] This application discloses an automated visual inspection device for pipe fitting production lines. By using multiple clamping points to coordinate force distribution, the self-weight of the pipe fitting is evenly distributed to each support point, effectively suppressing the bending deformation of long pipe fittings.

[0043] Example 1:

[0044] Reference Figure 1 , Figure 2 and Figure 3 As shown, an automated visual inspection device for a pipe fitting production line includes a frame 2, a base plate 21 on one side of the frame 2, a slide plate 22 slidably disposed on the base plate 21, and a clamping member 4 on one side disposed on the slide plate 22; a plurality of evenly distributed uprights 3 are evenly disposed on the frame 2, and one upright 3 on one side disposed on the slide plate 22.

[0045] When inspecting the pipe fitting 1, the pipe fitting 1 is first clamped by clamping parts 4 installed on multiple uprights 3. The multiple clamping parts 4 evenly distribute the weight of the pipe fitting 1 to suppress deformation. By driving the slide plate 22 to move, the slide plate 22 will drive one of the uprights 3 to move, and the clamping parts 4 on the upright 3 will move together, thereby adapting to pipe fittings 1 of different lengths.

[0046] The pipe fitting 1 is clamped by clamping parts 4 evenly distributed on multiple uprights 3. The clamping parts 4 are evenly distributed along the axial direction of the pipe fitting 1 to distribute the load of the pipe fitting 1 and effectively suppress the bending deformation of the long pipe fitting 1 due to its own weight. By driving the slide plate 22 to move along the base plate 21, the slide plate 22 drives the upright 3 on its side to move as a whole. The clamping parts 4 on the upright 3 adjust their positions synchronously, so as to realize the dynamic adaptation of the clamping spacing to pipe fittings 1 of different lengths and ensure that the axis of the pipe fitting 1 remains straight during the inspection process.

[0047] Reference Figure 3 and Figure 4 As shown, specifically, the clamping component 4 includes a support plate 41 provided on the upright 3, a V-shaped groove 42 provided on the support plate 41, a connecting frame 43 provided on one side of the support plate 41, and the connecting frame 43 is L-shaped, a guide rod 44 is provided on the connecting frame 43, and the guide rod 44 is located on the pressure plate 45 directly above the support plate 41.

[0048] When clamping the pipe fitting 1, the pipe fitting 1 is first placed between multiple V-shaped grooves 42. Then, the pressing cylinder 46 set on the connecting frame 43 is activated. The telescopic end of the pressing cylinder 46 slides through the connecting frame 43 and connects with the pressure plate 45. The pressing cylinder 46 pushes the pressure plate 45 so that the V-shaped pressing groove 47 opened on the pressure plate 45 presses onto the pipe fitting 1. At the same time, the guide rod 44 moves together to guide the pressure plate 45 to move. The V-shaped pressing groove 47 corresponds to the V-shaped groove 42 and is located directly above the V-shaped groove 42, thereby restricting the pipe fitting 1.

[0049] Among them, a lifting component 5 is provided on the frame 2 between two adjacent uprights 3. The lifting component 5 can support the pipe 1 before clamping, ensuring that the pipe 1 will not deform during the clamping process.

[0050] During testing, pipe fitting 1 is first placed on lifting member 5. The position of sliding plate 22 is adjusted to match the spacing of clamping members 4 with the length of pipe fitting 1. Lifting cylinder 54 is activated to lift to the testing height and place pipe fitting 1 on lifting member 5. Then, pressing cylinder 46 is activated to push pressure plate 45 down, so that V-shaped pressure groove 47 and V-shaped support groove 42 form an annular clamping space. The self-centering effect of V-shaped support groove 42 ensures the axial position of pipe fitting 1. The coordinated force of multiple clamping points distributes the weight of pipe fitting 1 evenly to each support point, effectively suppressing the bending deformation of long pipe fitting 1.

[0051] Reference Figure 5 As shown, specifically, the lifting component 5 includes a lifting frame 51 between two adjacent uprights 3. The lifting frame 51 is U-shaped, and symmetrically distributed guide rods 52 slide through the lifting frame 51. A crossbar 53 is provided at the upper end of the two guide rods 52.

[0052] Before clamping the pipe fitting 1, the lifting cylinder 54 installed on the lifting frame 51 is activated. The telescopic end of the lifting cylinder 54 slides through the lifting frame 51 and connects with the crossbar 53. The lifting cylinder 54 will push the crossbar 53 to rise and drive the guide rod 52. The guide rod 52 guides the crossbar 53 to move upward, so that the V-shaped plate 55 installed on the crossbar 53 rises to the detection height, that is, rises to a height not lower than the V-shaped support groove 42.

[0053] Then, the pipe fitting 1 is placed on multiple V-shaped plates 55. The pressure cylinder will push the pressure plate 45 so that the V-shaped pressure groove 47 opened on the pressure plate 45 presses onto the pipe fitting 1, so that the V-shaped pressure groove 47 and the V-shaped support groove 42 form a ring clamp. The self-centering axis is achieved through the V-shaped pressure groove 47 and the V-shaped support groove 42, which effectively avoids the bending deformation of the suspended section due to its own weight.

[0054] After clamping the pipe fitting 1, the lifting cylinder 54 retracts and pulls the crossbar 53 downward, and the guide rod 52 moves together, disengaging from the pipe fitting 1 without affecting the inspection of the pipe fitting 1.

[0055] Reference Figure 6 and Figure 7 As shown, a detector 6 is provided on one side of the clamping member 4 on the frame 2. The detector 6 measures the outer diameter, length and surface defects of the tube 1 and works with the telecentric lens to eliminate perspective errors.

[0056] Specifically, the detector 6 includes a sliding guide rail 61 provided on one side of the frame 2, a sliding plate 62 slidably provided on the sliding guide rail 61, a support frame 63 provided on the sliding plate 62, and the support frame 63 is U-shaped with an opening area 64 in the middle.

[0057] After clamping the pipe fitting 1, the sliding plate 62 is driven by the motor to move on the sliding guide rail 61. The sliding plate 62 drives the support frame 63 to move from one end of the pipe fitting 1 to the other end. The pipe fitting 1, the clamping member 4 and the support frame 63 have an opening area 64 in the middle. The center of the opening area 64 is aligned with the V-shaped groove 42 and will not interfere with the clamping member 4.

[0058] During the movement of the support frame 63 to the opening area 64, multiple industrial cameras 65 will inspect the pipe 1. With the help of parallel backlight, the surface image of the pipe 1 is ensured to be free of perspective error. The lenses of multiple industrial cameras 65 are all facing the center of the opening area 64 to perform all-round scanning inspection of the outside of the pipe 1. This achieves unobstructed, all-round, and high-precision visual inspection of the outside of the pipe 1, effectively solving the problem of the limitation of the inspection line of sight by the traditional clamping structure.

[0059] Example 2:

[0060] Looking back Figure 2 , Figure 3 and Figure 4 As shown, based on Embodiment 1, when the industrial camera 65 inspects the pipe fitting 1, the V-shaped clamping area formed by the pressure plate 45 and the support plate 41 directly blocks part of the surface of the pipe fitting 1, causing the industrial camera 65 to be unable to completely collect image data of the blocked part.

[0061] Therefore, after the support frame 63 moves from one side to the other, the lifting cylinder 54 is activated to push the crossbar 53 upward. At the same time, the crossbar 53 drives the V-shaped plate 55 to support the pipe 1. At this time, the pressing cylinder 46 is lifted and drives the pressure plate 45 away from the pipe 1, thereby releasing the clamping of the pipe 1. However, the pressing cylinder 46 on the slide plate 22 will push the pressure plate 45 again to clamp the pipe 1. Then, by driving the slide plate 22 to move, the clamping position of the pipe 1 is misaligned.

[0062] Afterwards, the pressing cylinder 46 on the slide plate 22 will lift up and drive the pressure plate 45 away from the pipe 1, thereby releasing the clamping of the pipe 1. Then, the slide plate 22 will drive the clamping part 4 on it to move to the next detection position. After that, all the pressing cylinders 46 will be activated, so that the V-shaped pressure groove 47 and the V-shaped support groove 42 form a ring clamping. After the clamping of the pipe 1 is completed, the lifting cylinder 54 will retract and pull the crossbar 53 to move downward. The guide rod 52 will move together and disengage from the pipe 1, without affecting the detection of the pipe 1.

[0063] Subsequently, the sliding plate 62 drives the support frame 63 to move from one end of the pipe 1 to the other end. Multiple industrial cameras 65 have their lenses facing the center of the opening area 64 to perform all-round scanning and inspection of the outside of the pipe 1. This achieves unobstructed, all-round, and high-precision visual inspection of the outside of the pipe 1, effectively solving the problem of the limitation of the inspection line of sight by the traditional clamping structure.

[0064] Example 3:

[0065] Reference Figure 8 , Figure 9 and Figure 10 As shown, based on Embodiment 1 and Embodiment 2, pressure boosting detection components 7 are symmetrically arranged on the uprights 3 on both sides.

[0066] The pressurization detection component 7 includes support plates 71 symmetrically arranged on the two uprights 3. A sliding groove 72 is provided on the support plate 71. A sliding support rod 73 is slidably arranged in the sliding groove 72. A connecting cylinder 74 is provided on the sliding support rod 73. A water inlet pipe 75 is slidably inserted in the connecting cylinder 74. A guide plug 76 is provided at one end of the water inlet pipe 75.

[0067] After clamping the pipe fitting 1, the transmission screw passing through the support plate 71 is driven to rotate. The transmission screw is driven to move the connecting cylinder 74 toward the pipe fitting 1 through the threaded connection with the sliding support rod 73. The guide plug 76 is provided with a guide slope 77 at one end, which will make the guide plug 76 press against one end of the pipe fitting 1. The guide plug 76 is provided with a rubber ring at one end. The connecting cylinder 74 continues to move and compresses the return spring 79 provided between the guide plug 76 and one end of the connecting cylinder 74. The return spring 79 is sleeved on the water inlet pipe 75. The return spring 79 is compressed and pushes the guide plug 76 to press against one end of the pipe fitting 1. The rubber ring seals the pipe fitting 1.

[0068] At this time, the guide plugs 76 at both ends seal both ends of the pipe fitting 1, forming an independent sealed space inside the pipe fitting 1. Then, the water inlet pipe 75 injects water into the pipe fitting 1. The water flows into the sealed pipe fitting 1 through the water inlet hole 78 on the guide plug 76, which is connected to the water inlet pipe 75. The water injection and pressure test is performed to ensure that the pipe fitting 1 has no leakage under high pressure. The water injection test can detect micro-cracks or leakage points in the pipe and prevent failures.

[0069] Reference Figure 10 and Figure 11 As shown, in addition, a pressure control component 8 is installed inside the water inlet pipe 75. The pressure control component 8 is used to control the pressure inside the pipe fitting 1, providing a reliable pressure environment for water injection testing. At the same time, it adapts to the testing needs of multiple specifications of pipe fitting 1 through a closed-loop feedback mechanism, ensuring the accuracy of the test data.

[0070] Specifically, the pressure control component 8 includes a water-blocking ring 81 installed inside the water inlet pipe 75, an adjusting screw 82 slidingly passing through the water inlet pipe 75 and threadedly connected to the water inlet pipe 75, a stop block 83 rotatably mounted on one end of the adjusting screw 82 after passing through the water-blocking ring 81, and a water-blocking plug 84 corresponding to the water-blocking ring 81 sliding and rotatably mounted on the adjusting screw 82, and a clamping spring 85 between the guide plug 76 and the stop block 83.

[0071] When water flows through the inlet pipe 75 and into the inlet hole 78, the water flows through the center of the water-blocking ring 81 and then pushes the water-blocking plug 84, causing the water-blocking plug 84 to move and compress the clamping spring 85, thereby opening the water-blocking ring 81 and allowing the water to flow through the inlet pipe 75 and into the pipe fitting 1 through the inlet hole 78.

[0072] When the pressure inside the fitting 1 is equal to the pressure of the injected water flow, the retaining spring 85 will push the water-blocking plug 84 to block the water-blocking ring 81, and the water flow in the inlet pipe 75 can no longer enter the fitting 1.

[0073] Therefore, the water flowing into pipe fitting 1 needs to push the water-blocking plug 84 to compress the clamping spring 85 in order to open the water-blocking ring 81 and enter pipe fitting 1. By rotating the adjusting screw 82, the adjusting screw 82 will drive the stop block 83 to move inside the water inlet pipe 75 through the threaded connection with the water inlet pipe 75, thereby changing the compression force of the clamping spring 85. In the initial stage, the water flow pushes the water-blocking plug 84 to compress the spring and open the water-blocking ring 81, allowing water to flow into pipe fitting 1. When the pressure inside pipe fitting 1 is equal to the water injection pressure, the spring restoring force pushes the water-blocking plug 84 to move in the opposite direction and close the channel, forming a mechanical automatic cut-off; thus, the pressure of pipe fitting 1 can be changed by adjusting the elastic force of the clamping spring 85.

[0074] Finally, the steps for using this application are as follows:

[0075] S1: Inspection preparation. By adjusting the position of the slide plate 22, the spacing between each clamping component 4 is matched with the length of the pipe 1. The pipe 1 is placed on multiple V-shaped plates 55. Then, the pressing cylinder 46 is activated to push the pressure plate 45 down, so that the V-shaped pressure groove 47 and the V-shaped support groove 42 form an annular clamping space, ensuring the axial position of the pipe 1. The multiple clamping points work together to distribute the weight of the pipe 1 evenly to each support point, effectively suppressing the bending deformation of the long pipe 1.

[0076] S2: Lifting and retraction. After clamping the pipe fitting 1, the lifting cylinder 54 retracts and pulls the crossbar 53 downward. The guide rod 52 moves together and disengages from the pipe fitting 1, without affecting the inspection of the pipe fitting 1.

[0077] S3: Visual inspection. After clamping the pipe 1, the sliding plate 62 is driven by the motor to move on the sliding guide rail 61. The sliding plate 62 drives the support frame 63 to move from one end of the pipe 1 to the other end. Multiple industrial cameras 65 will inspect the pipe 1.

[0078] S4: Pressure test. The guide plugs 76 at both ends seal both ends of the pipe fitting 1, forming an independent sealed space inside the pipe fitting 1. Then, the water inlet pipe 75 injects water into the pipe fitting 1. The water flows into the sealed pipe fitting 1 through the water inlet hole 78 on the guide plug 76, which is connected to the water inlet pipe 75. The water injection and pressure test is performed to ensure that the pipe fitting 1 has no leakage under high pressure. The water injection test can detect micro-cracks or leakage points in the pipe and prevent failure.

[0079] S5: Pressure regulation. The water flow entering the pipe fitting 1 needs to push the water-blocking plug 84 to compress the clamping spring 85 in order to open the water-blocking ring 81 and enter the pipe fitting 1. By rotating the adjusting screw 82, the adjusting screw 82 will drive the stop block 83 to move inside the water inlet pipe 75 through the threaded connection with the water inlet pipe 75, thereby changing the compression force of the clamping spring 85. When the pressure inside the pipe fitting 1 is equal to the water injection pressure, the spring restoring force pushes the water-blocking plug 84 to move in the opposite direction to close the channel, forming a mechanical automatic cut-off. Thus, the pressure of the pipe fitting 1 can be changed by adjusting the elasticity of the clamping spring 85.

[0080] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. An automated visual inspection device for a pipe fitting production line, comprising a frame (2), characterized in that: A base plate (21) is provided on one side of the frame (2), and a sliding plate (22) is slidably provided on the base plate (21). One clamping member (4) on one side is provided on the sliding plate (22). Multiple evenly distributed uprights (3) are evenly provided on the frame (2), and one upright (3) on one side is provided on the sliding plate (22). Clamping members (4) are provided on multiple uprights (3). The clamping component (4) includes a support plate (41) provided on the upright (3), a V-shaped groove (42) provided on the support plate (41), a connecting frame (43) provided on one side of the support plate (41), and the connecting frame (43) is L-shaped. A guide rod (44) is passed through the connecting frame (43), and the guide rod (44) is located on the pressure plate (45) directly above the support plate (41).

2. The automated visual inspection device for pipe fitting production lines according to claim 1, characterized in that: The clamping component (4) also includes a pressing cylinder (46) on the connecting frame (43). The telescopic end of the pressing cylinder (46) slides through the connecting frame (43) and connects with the pressure plate (45). The pressure plate (45) has a V-shaped pressure groove (47) corresponding to the V-shaped bracket (42).

3. The automated visual inspection device for pipe fitting production lines according to claim 1, characterized in that: A lifting element (5) is installed on the frame (2) between two adjacent uprights (3); The lifting component (5) includes a lifting frame (51) between two adjacent uprights (3). The lifting frame (51) is U-shaped. Symmetrically distributed guide rods (52) slide through the lifting frame (51). A crossbar (53) is provided at the upper end of the two guide rods (52). A lifting cylinder (54) is provided on the lifting frame (51). The telescopic end of the lifting cylinder (54) slides through the lifting frame (51) and is connected to the crossbar (53).

4. The automated visual inspection device for pipe fitting production lines according to claim 3, characterized in that: A V-shaped plate (55) is provided on the crossbar (53).

5. The automated visual inspection device for pipe fitting production lines according to claim 1, characterized in that: A detector (6) is provided on one side of the clamp (4) on the frame (2); The detector (6) includes a sliding guide rail (61) provided on one side of the frame (2), a sliding plate (62) is slidably provided on the sliding guide rail (61), a support frame (63) is provided on the sliding plate (62), and the support frame (63) is U-shaped with an opening area (64) in the middle.

6. The automated visual inspection device for pipe fitting production lines according to claim 5, characterized in that: The center of the opening area (64) is aligned with the V-shaped bracket (42).

7. The automated visual inspection device for pipe fitting production lines according to claim 5, characterized in that: Multiple industrial cameras (65) are installed in the opening area (64), and the multiple industrial cameras (65) face the center of the opening area (64).

8. The automated visual inspection device for pipe fitting production lines according to claim 1, characterized in that: Pressure detection components (7) are symmetrically installed on the uprights (3) on both sides; The pressurization test piece (7) includes a support plate (71) symmetrically arranged on two uprights (3). A sliding groove (72) is provided on the support plate (71). A sliding support rod (73) is slidably arranged in the sliding groove (72). A connecting tube (74) is provided on the sliding support rod (73). A water inlet pipe (75) is slidably inserted in the connecting tube (74). A guide plug (76) is provided at one end of the water inlet pipe (75).

9. The automated visual inspection device for pipe fitting production lines according to claim 8, characterized in that: One end of the guide plug (76) is provided with a guide slope (77), and the guide plug (76) is provided with a water inlet hole (78) that communicates with the water inlet pipe (75). A return spring (79) is provided between one end of the guide plug (76) and the connecting cylinder (74), and the return spring (79) is sleeved on the water inlet pipe (75).

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