Comprehensive detection device for air tightness and size of pipe fittings and detection method thereof

Abstract

The application relates to a comprehensive detection device for air tightness and size of pipe fittings and a detection method thereof, which comprises a workbench, a control device, a feeding mechanism, an air tightness detection mechanism, a size detection mechanism, a discharging mechanism, a first defective product discharging mechanism, a second defective product discharging mechanism and a cross-zone conveying mechanism. The workbench is sequentially divided into a feeding area, an air tightness detection area, a size detection area and a qualified product discharging area from left to right. The application can realize full-automatic feeding, pipe fitting air tightness detection, pipe fitting side surface size detection, pipe fitting upper and lower end surface size detection and full-automatic discharging and packaging functions, and workers only need to place pipe fittings on a tray (or a mechanical arm can be used instead), so that the labor intensity of workers is greatly reduced, and the application is suitable for batch detection of production manufacturers.

Description

Technical Field

[0001] This invention relates to the field of pipe fitting production testing, and in particular to a comprehensive testing equipment and method for the airtightness and dimensions of pipe fittings. Background Technology

[0002] Pipe fittings are components used to connect pipes into pipelines. They serve functions such as connection, control, direction change, flow distribution, sealing, and support in piping systems. Common pipe fittings can be classified according to pipe branching into tee pipes, tee pipes, and cross pipes, and according to pipe direction into straight pipes and bend pipes. Fittings that change the pipe diameter include reducers, reducing elbows, and branch pipe supports. Fittings used for fixing pipe fittings include brackets, supports, and clamps.

[0003] A prior art example, referring to patent document CN115090557A, discloses a fully automatic airtightness testing device and method for pipe fittings, including a workbench and an electrical control assembly; a pipe fitting placement mechanism; an airtightness testing mechanism; a feeding channel; and a transfer mechanism. The airtightness testing mechanism includes a differential pressure transmitter with a first and a second testing pipe, a first on / off ball valve, a feeding fixture, a pressure plug, a second on / off ball valve, a pressure sensor, and a differential pressure sensor. Both the first and second on / off ball valves include a valve body, a valve core, a valve stem, a control shaft for controlling the valve stem, and an input gear sleeved on the control shaft. It also includes a switch control motor and an output gear sleeved on the switch control motor, with the output gear meshing with the input gear. This invention achieves fully automatic feeding, testing, and unloading functions, requiring only manual placement of the pipe fittings on the tray (which can also be replaced by machinery), greatly reducing the labor intensity of workers and making it suitable for batch testing by manufacturers. However, the above technical example only tests the airtightness of pipe fittings, representing a single-method testing approach. As pipe fittings, dimensions are also one of the most critical parameters, and existing equipment and methods cannot meet the requirements. Summary of the Invention

[0004] To overcome the above-mentioned shortcomings of the prior art, the present invention provides a comprehensive testing device and method for airtightness and dimensional inspection of pipe fittings.

[0005] The technical solution of this invention to solve its technical problem is: a comprehensive testing device for airtightness and dimensions of pipe fittings, comprising:

[0006] The workbench and control device are divided from left to right into a feeding area, an airtightness testing area, a size testing area, and a qualified product unloading area.

[0007] The feeding mechanism is located in the feeding area and includes a feeding moving module and a feeding workpiece plate driven by the feeding moving module.

[0008] An airtightness testing mechanism, set in an airtightness testing area, consists of multiple sets of airtightness testing components arranged side by side. Each set of airtightness testing components includes a differential pressure transmitter with a first testing pipe and a second testing pipe, a first on / off ball valve connected to one end of the first testing pipe, an airtightness testing seat connected to the other end of the first testing pipe and used to place a pipe fitting, a pressure plug for sealing one port of the pipe fitting, a vertical testing cylinder for driving the pressure plug to rise and fall, a second on / off ball valve connected to one end of the second testing pipe, a pressure sensor connected to the other end of the second testing pipe, and a differential pressure sensor connected to the differential pressure transmitter.

[0009] The size detection mechanism is set in the size detection area and includes a first detection waiting component, a horizontal camera detection component, a second detection waiting component, and a vertical camera detection component set behind the second detection waiting component, arranged from left to right.

[0010] The unloading mechanism is located in the unloading area and includes an unloading moving module and an unloading workpiece plate driven by the unloading moving module.

[0011] The first product feeding mechanism is located between the airtightness testing area and the size testing area;

[0012] The second product feeding mechanism is located between the size inspection area and the qualified product unloading area;

[0013] A cross-regional conveying mechanism is installed across the left and right ends of the workbench.

[0014] A further configuration of the airtightness detection component in this invention includes a first detection guide rail disposed within the airtightness detection area, a first detection sliding seat slidably disposed on the first detection guide rail, a first push-pull cylinder acting on the first detection sliding seat, and the airtightness detection seat being fixed on the first detection sliding seat.

[0015] A further configuration of the cross-regional conveying mechanism in this invention is that the cross-regional conveying mechanism includes a first conveying component and a second conveying component arranged opposite to each other;

[0016] The first conveying assembly includes a first conveying bracket, a first spur toothed track fixed on the first conveying bracket, a first drive gear meshing and transmitting with the first spur toothed track, a first reduction motor acting on the first drive gear, a first conveying support plate connected to the first reduction motor, and a first conveying pneumatic finger fixed on the first conveying spur toothed plate.

[0017] The second conveying assembly includes a second conveying bracket, a second spur gear fixed on the second conveying bracket, a second drive gear meshing and engaging with the second spur gear, a second reduction motor acting on the second drive gear, a second conveying support plate connected to the second reduction motor, and a second conveying pneumatic finger fixed on the second conveying spur gear plate.

[0018] Furthermore, both the first and second conveying supports are equipped with a plurality of fixed position feedback plates, and both the first and second conveying support plates are equipped with movable position sensors. The fixed position feedback plates and the movable position sensors are inductively connected.

[0019] Preferably, the size detection mechanism is further provided with a light shield, and the light shield has a passage groove.

[0020] A further configuration of the size detection mechanism in this invention is that the first detection waiting component and the horizontal camera detection component each include a first detection fixture, a rotating shaft passing through the first detection fixture, a go / no-go gauge installed on the upper end of the rotating shaft, and a servo motor connected to the lower end of the rotating shaft.

[0021] The horizontal camera detection assembly further includes a horizontal camera mounting bracket, a horizontal detection camera fixed on the horizontal camera mounting bracket, a horizontal focusing lens disposed in front of the horizontal detection camera, and a light source plate; wherein, the horizontal detection camera and the horizontal focusing lens are located behind the first detection fixture, and the light source plate is located in front of the first detection fixture.

[0022] The second detection waiting assembly includes a second detection guide rail, a second detection sliding seat slidably mounted on the second detection guide rail, a second push-pull cylinder acting on the second detection sliding seat, a flip support plate and a second detection fixture fixed on the second detection sliding seat, a lifting cylinder fixed on the flip support plate, a flip cylinder acting on the lifting cylinder and arranged in the front-back direction, and a pneumatic flipping finger acting on the flip cylinder.

[0023] The vertical camera detection assembly also includes a vertical camera mounting bracket, a vertical detection camera fixed on the vertical camera mounting bracket, and a vertical focusing lens disposed below the vertical detection camera.

[0024] A further configuration of the size detection mechanism in this invention is that the pneumatic flipping finger includes a left joint finger and a right joint finger, and the left joint finger and the right joint finger are staggered in the vertical direction.

[0025] A further feature of the feeding mechanism in this invention is that the feeding workpiece plate is provided with positioning ribs;

[0026] A further configuration of the feeding mechanism in this invention is that a packaging box is provided on the periphery of the feeding workpiece plate, and a pearl cotton partition is provided inside the packaging box to divide the interior of the packaging box into several independent storage areas.

[0027] A further configuration of the first product discharge mechanism and the second product discharge mechanism in this invention is that the first product discharge mechanism includes a first discharge bracket, a first conveyor belt wound on the first discharge bracket, and a first discharge motor that drives the first conveyor belt.

[0028] The second product discharge mechanism includes a second discharge bracket, a second conveyor belt wound on the second discharge bracket, and a second discharge motor that drives the second conveyor belt.

[0029] A testing method, applicable to the aforementioned comprehensive testing equipment for airtightness and dimensions of pipe fittings, includes the following steps:

[0030] S1. The worker places the pipe fitting to be inspected into the loading workpiece plate, with each pipe fitting corresponding to one positioning rib;

[0031] S2. The cross-zone conveying mechanism is started, and the pipes on the loading workpiece plate are transferred to the airtightness testing seat through the first conveying pneumatic finger in the first conveying component.

[0032] S3. The first push-pull cylinder is activated, pushing the airtightness test seat to the bottom of the pressure plug and connecting it to the first test pipe. Then the vertical test cylinder is activated to seal the pressure plug at the end of the pipe fitting.

[0033] S4. Both the first and second opening and closing ball valves are connected to external fluid pipelines. When the first and second opening and closing ball valves are opened, the fluid in the external fluid pipelines enters the first and second detection pipelines at the same speed and in the same amount.

[0034] S5. Control the fluid flow rate by observing the data fed back by the pressure sensor; at the same time, observe whether there is a leakage problem in the pipe fittings being tested by observing the data fed back by the differential pressure sensor in the differential pressure transmitter.

[0035] S6. The first and second ball valves are closed, and the vertical cylinder is activated to raise the pressure plug to make room.

[0036] If a leak is detected in the pipe fitting, the cross-zone conveying mechanism is activated. The second conveying pneumatic finger in the second conveying assembly grabs the pipe fitting on the airtightness testing seat and moves it into the first conveyor belt. The first discharge motor is activated to make the first conveyor belt run and discharge the leaking pipe fitting. Then the first push-pull cylinder drives the airtightness testing seat to reset.

[0037] If no leak is detected in the pipe fitting, the first push-pull cylinder drives the air tightness testing seat to return to its original position, the cross-zone conveying mechanism is started, and the pipe fitting on the air tightness testing seat is grabbed and moved to the first testing waiting assembly by the first conveying pneumatic finger in the first conveying assembly.

[0038] S7. The first conveying pneumatic finger in the first conveying assembly grabs the pipe in the first detection waiting assembly and moves it to the go / no-go gauge in the horizontal camera detection assembly. Then, the horizontal detection camera and the light source board are activated. The horizontal side dimension of the pipe is detected by image comparison. During the detection process, the corresponding servo motor is activated and the pipe is rotated, thereby realizing 360-degree full dimension detection.

[0039] S8. The tube on the first detection fixture corresponding to the horizontal camera detection component is grasped and moved to the second detection fixture of the second detection waiting component by the first conveying pneumatic finger in the first conveying component.

[0040] If the side dimension is not qualified in step S7, the second conveying pneumatic finger in the second conveying assembly will grab the pipe on the second inspection waiting assembly corresponding to the second inspection fixture and move it into the second conveyor belt. The second discharge motor will start to make the second conveyor belt run and discharge the pipe with unqualified dimensions.

[0041] If the side dimension is qualified in step S7, the second push-pull cylinder is activated to push the second detection sliding seat forward, so that the second detection fixture seat moves to directly below the vertical detection camera.

[0042] S9. Start the vertical inspection camera and inspect the upper end face dimensions of the pipe fitting by comparing images;

[0043] Next, the pneumatic flipping finger grabs the pipe on the second inspection fixture. The lifting cylinder pushes the pneumatic flipping finger upward and makes room. Then the flipping cylinder flips the pipe 180 degrees up and down. The lifting cylinder lowers so that the pipe on the pneumatic flipping finger falls back onto the second inspection fixture.

[0044] Restart the vertical inspection camera and inspect the lower end face dimensions of the pipe fitting by comparing the images.

[0045] S10. If the dimensions of the upper and lower end faces are not up to standard in step S9, the second push-pull cylinder is started to move the second inspection fixture to the bottom of the second conveying pneumatic finger. Then, the second conveying pneumatic finger in the second conveying assembly grabs the pipe on the second inspection fixture and moves it into the second conveyor belt. The second discharge motor is started to make the second conveyor belt run and discharge the pipe with unqualified dimensions.

[0046] If the side dimensions are found to be within acceptable limits in step S9, the second push-pull cylinder is activated to move the second inspection fixture to below the first conveying pneumatic finger. Then, the first conveying pneumatic finger in the first conveying assembly grabs the pipe on the second inspection fixture and moves it to the independent storage area of ​​the packaging box, thus completing all inspections and unloading.

[0047] The beneficial effects of this invention are as follows: 1. A single device can achieve fully automatic feeding, pipe fitting airtightness testing, pipe fitting side dimension testing, pipe fitting upper and lower end face dimension testing, and fully automatic unloading and packaging functions. Manual labor is only required to place the pipe fittings on the material tray (or a robotic arm can be used instead), greatly reducing the labor intensity of workers and making it suitable for batch testing by manufacturers. 2. By using dual-path testing pipelines for comparative testing, a differential pressure sensor determines whether there is a leak, replacing the existing single-path air pressure sensor. This significantly improves the sensitivity and accuracy of the detection, and can detect even minor leaks. 3. Dimensional detection uses a visual inspection method, which is more accurate and effectively reduces costs. 4. A dual-track cross-zone conveying mechanism is used for coordinated operation, resulting in higher conveying efficiency. 5. Multiple sets of parallel airtightness testing components can simultaneously test multiple pipe fittings, improving testing efficiency. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0049] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective.

[0050] Figure 3 This is a top view of the present invention.

[0051] Figure 4 This is a schematic diagram of the feeding mechanism.

[0052] Figure 5 This is a schematic diagram of the airtightness testing mechanism.

[0053] Figure 6 This is a structural schematic diagram of the airtightness testing mechanism from another angle.

[0054] Figure 7 This is a structural diagram of an airtightness testing agency performing testing work.

[0055] Figure 8 This is a schematic diagram of the size inspection mechanism.

[0056] Figure 9 This is a structural schematic diagram of the dimensional inspection mechanism from another angle.

[0057] Figure 10 This is a schematic diagram of the structure of the first detection waiting component.

[0058] Figure 11 This is a magnified schematic diagram of a portion of the structure of the second detection waiting component.

[0059] Figure 12 This is a schematic diagram of the first or second product feeding mechanism.

[0060] Figure 13 This is a schematic diagram of the cross-regional conveying mechanism.

[0061] Figure 14 This is a schematic diagram of a fixed position feedback plate and a movable position sensor.

[0062] Figure 15 This is a plan view of the packaging box in the feeding mechanism.

[0063] In the diagram: 1. Workbench; 101. Loading area; 102. Air tightness testing area; 103. Dimension testing area; 104. Qualified product unloading area; 2. Loading mechanism; 201. Loading moving module; 202. Loading workpiece plate; 2021. Positioning rib; 3. Air tightness testing mechanism; 3011. First testing guide rail; 3012. First testing sliding seat; 3013. First push-pull cylinder; 302. Air tightness testing component; 3021. First testing pipe; 3022. Second testing pipe; 3023. First opening and closing ball valve; 3024. Second opening and closing ball valve; 303. Air tightness testing seat; 304. Pressing plug; 305. Testing vertical cylinder; 306. Pressing... Force sensor; 307, Differential pressure transmitter; 4, Dimension detection mechanism; 401, First detection waiting assembly; 402, Horizontal camera detection assembly; 4021, Horizontal camera mounting bracket; 4022, Horizontal detection camera; 4023, Horizontal focusing lens; 4024, Light source plate; 403, Second detection waiting assembly; 4031, Second detection guide rail; 4032, Second detection sliding seat; 4033, Second push-pull cylinder; 4034, Tilting support plate; 4035, Lifting cylinder; 4036, Tilting cylinder; 4037, Pneumatic tilting finger; 4037a, Left joint finger and right joint finger; 4038, Second detection fixture; 404. Vertical camera inspection assembly; 4041, Vertical camera mounting bracket; 4042, Vertical inspection camera; 4043, Vertical focusing lens; 405, Light shield; 4051, Through slot; 4061, First inspection fixture; 4062, Rotating shaft; 4063, Go / No-Go gauge; 4064, Servo motor; 5, Unloading mechanism; 501, Unloading moving module; 502, Unloading workpiece plate; 503, Packaging box; 504, Pearl cotton divider; 505, Storage area; 6, First product discharge mechanism; 601, First discharge bracket; 602, First conveyor belt; 603, First discharge motor; 7, Second product discharge mechanism; 701, Second discharge bracket; 702. Second conveyor belt; 703, Second discharge motor; 8, Cross-zone conveying mechanism; 801, First conveying assembly; 8011, First conveying support; 8012, First spur gear track; 8013, First drive gear; 8014, First geared motor; 8015, First conveying support plate; 8016, First pneumatic conveying finger; 802, Second conveying assembly; 8021, Second conveying support; 8022, Second spur gear track; 8023, Second drive gear; 8024, Second geared motor; 8025, Second conveying support plate; 8026, Second pneumatic conveying finger; 803, Fixed position feedback plate; 804, Movable position sensor; 9, Pipe fitting. Detailed Implementation

[0064] Example 1

[0065] Reference Figures 1 to 15 A comprehensive testing device for the airtightness and dimensions of pipe fittings 9, comprising:

[0066] The workbench 1 and the control device are divided from left to right into a feeding area 101, an airtightness detection area 102, a size detection area 103 and a qualified product unloading area 104.

[0067] The feeding mechanism 2 is disposed in the feeding area 101 and includes a feeding moving module 201 and a feeding workpiece plate 202 driven by the feeding moving module 201.

[0068] The airtightness testing mechanism 3 is set in the airtightness testing area 102 and consists of multiple sets of airtightness testing components 302 arranged side by side. Each set of airtightness testing components 302 includes a differential pressure transmitter 307 with a first testing pipe 3021 and a second testing pipe 3022, a first on / off ball valve 3023 connected to one end of the first testing pipe 3021, an airtightness testing seat 303 connected to the other end of the first testing pipe 3021 and used to place the pipe fitting 9, a pressure plug 304 used to seal one port of the pipe fitting 9, a vertical testing cylinder 305 used to drive the pressure plug 304 to rise and fall, a second on / off ball valve 3024 connected to one end of the second testing pipe 3022, a pressure sensor 306 connected to the other end of the second testing pipe 3022, and a differential pressure sensor connected to the differential pressure transmitter 307.

[0069] The size detection mechanism 4 is set in the size detection area 103 and includes a first detection waiting component 401, a horizontal camera detection component 402, a second detection waiting component 403, and a vertical camera detection component 404 set behind the second detection waiting component 403, arranged sequentially from left to right.

[0070] The unloading mechanism 5 is disposed in the unloading area and includes an unloading moving module 501 and an unloading workpiece plate 502 driven by the unloading moving module 501.

[0071] The first product discharge mechanism 6 is located between the airtightness detection area 102 and the size detection area 103;

[0072] The second product feeding mechanism 7 is located between the size inspection area 103 and the qualified product unloading area 104;

[0073] The cross-regional conveying mechanism 8 is installed across the left and right ends of the workbench 1.

[0074] Example 2

[0075] Based on the structure of Embodiment 1, this embodiment provides further preferred solutions for multiple components, referring to... Figures 1 to 15The details are as follows:

[0076] I. The airtightness testing component 302 is further configured as follows: (Refer to...) Figures 5-7 The airtightness testing component 302 further includes a first testing guide rail 3011 disposed within the airtightness testing area 102, a first testing sliding seat 3012 slidably disposed on the first testing guide rail 3011, a first push-pull cylinder 3013 acting on the first testing sliding seat 3012, and the airtightness testing seat 303 fixed on the first testing sliding seat 3012. The first push-pull cylinder 3013 is activated and can drive the first testing sliding seat 3012 to move along the first testing guide rail 3011 to satisfy the front and rear position adjustment function.

[0077] II. Further configuration of the inter-regional conveying mechanism 8: Refer to Figures 13-14 The cross-regional conveying mechanism 8 includes a first conveying component 801 and a second conveying component 802 arranged opposite to each other;

[0078] The first conveying assembly 801 includes a first conveying bracket 8011, a first spur tooth track 8012 fixed on the first conveying bracket 8011, a first drive gear 8013 meshing and transmitting with the first spur tooth track 8012, a first reduction motor 8014 acting on the first drive gear 8013, a first conveying support plate 8015 connected to the first reduction motor 8014, and a first conveying pneumatic finger 8016 fixed on the first conveying spur tooth plate.

[0079] The second conveying assembly 802 includes a second conveying bracket 8021, a second spur gear 8022 fixed on the second conveying bracket 8021, a second drive gear 8023 meshing with and transmitting through the second spur gear 8022, a second reduction motor 8024 acting on the second drive gear 8023, a second conveying support plate 8025 connected to the second reduction motor 8024, and a second conveying pneumatic finger 8026 fixed on the second conveying spur gear plate.

[0080] The first conveying component 801 and the second conveying component 802 are combined to form a dual-channel conveying structure, so that the first conveying pneumatic finger 8016 and the second conveying pneumatic finger 8026 can operate at the same time to meet their respective conveying actions and provide conveying and detection efficiency.

[0081] Furthermore, the first conveying bracket 8011 and the second conveying bracket 8021 are each provided with a plurality of fixed position feedback plates 803, and the first conveying support plate 8015 and the second conveying support plate 8025 are each provided with a movable position sensor 804. The fixed position feedback plates 803 and the movable position sensors 804 are connected inductively to effectively monitor the conveying distance and make the positioning more accurate.

[0082] III. Further configuration of the dimensional inspection mechanism 4: (Refer to...) Figures 8-11 The first detection waiting component 401 and the horizontal camera detection component 402 both include a first detection fixture 4061, a rotating shaft 4062 passing through the first detection fixture 4061, a go / no-go gauge 4063 mounted on the upper end of the rotating shaft 4062, and a servo motor 4064 connected to the lower end of the rotating shaft 4062. The go / no-go gauge 4063 is a measuring instrument conforming to the pipe fitting 9, used for simple direct measurement of the pipe fitting 9 placed on it. On the other hand, the servo motor 4064 can drive the go / no-go gauge 4063 to rotate via the rotating shaft 4062, thereby allowing the pipe fitting 9 to rotate in position during rotation and ensuring a more precise fit between the pipe fitting 9 and the go / no-go gauge 4063.

[0083] In the dimension inspection mechanism 4, the horizontal camera inspection component 402 further includes a horizontal camera mounting bracket 4021, a horizontal inspection camera 4022 fixed on the horizontal camera mounting bracket 4021, a horizontal focusing lens 4023 disposed in front of the horizontal inspection camera 4022, and a light source plate 4024; wherein, the horizontal inspection camera 4022 and the horizontal focusing lens 4023 are located behind the first inspection fixture 4061, and the light source plate 4024 is located in front of the first inspection fixture 4061. The light source plate 4024 unifies the imaging light, resists external interference, and, combined with the focusing effect of the horizontal focusing lens 4023, makes the image of the pipe component 9 captured by the horizontal inspection camera 4022 clearer, thereby obtaining an accurate horizontal dimension inspection result by comparing it with the preset parameters in the control device.

[0084] In the dimensional inspection mechanism 4, the vertical camera inspection component 404 further includes a vertical camera mounting bracket 4041, a vertical inspection camera 4042 fixed on the vertical camera mounting bracket 4041, and a vertical focusing lens 4043 disposed below the vertical inspection camera 4042. Since the vertical inspection camera 4042 is positioned downwards (on the worktable 1), interference is relatively small, eliminating the need for a light source plate. Combined with the focusing effect of the vertical focusing lens 4043, the vertical inspection camera 4042 can capture clear images of the end face of the pipe fitting 9 for comparison and determination of dimensional compliance.

[0085] Since the pipe fitting 9 has two end faces, upper and lower, a second detection waiting assembly 403 is provided to facilitate inspection, based on the original structure of the vertical camera detection assembly 404. Specifically, the second detection waiting assembly 403 includes a second detection guide rail 4031, a second detection sliding seat 4032 slidably mounted on the second detection guide rail 4031, a second push-pull cylinder 4033 acting on the second detection sliding seat 4032, a flip support plate 4034 and a second detection fixture seat 4038 fixed on the second detection sliding seat 4032, a lifting cylinder 4035 fixed on the flip support plate 4034, a flip cylinder 4036 acting on the lifting cylinder 4035 and arranged in the front-back direction, and a pneumatic flipping finger 4037 acting on the flip cylinder 4036. Through the coordinated operation of the components in the second inspection waiting assembly 403, the second inspection fixture 4038 can be moved and repositioned, and finally the pipe 9 can be flipped by the pneumatic flipping finger 4037 to achieve the position exchange of the upper and lower end faces. Thus, the dimensions of the upper and lower end faces of the pipe 9 can be inspected by the same vertical camera inspection assembly 404.

[0086] Preferably, the size detection mechanism 4 is further provided with a light shield 405, and the light shield 405 is provided with a passage groove 4051 so that the cross-area conveying mechanism 8 can pass through and operate.

[0087] Because the surface of the pipe fitting 9 is smooth and varies in size, to prevent slippage and instability during gripping, the structure is designed as follows: the pneumatic flipping finger 4037 includes a left-hand joint finger and a right-hand joint finger 4037a, which are staggered vertically. The left-hand and right-hand joint fingers can respectively abut and grip different height positions of the same pipe fitting 9, thereby making the gripping force more balanced and the reliability better.

[0088] IV. Feeding Mechanism 2: Refer to Figure 4 The loading workpiece plate 202 is provided with positioning ribs 2021, and each pipe 9 can be fitted into the corresponding positioning rib 2021.

[0089] V. Feeding Mechanism 5: Refer to Figure 2 , Figure 15Preferably, the workpiece plate 502 is provided with a packaging box 503 on its periphery, and the packaging box 503 is provided with a pearl cotton partition 504 to divide the interior of the packaging box 503 into several independent storage areas 505. On the one hand, the pearl cotton partition 504, due to the characteristics of its material, can provide a cushioning protection for the pipe 9, thereby preventing the pipe 9 from being damaged during unloading and resulting in defective products; on the other hand, the setting of the packaging box 503 and the pearl cotton partition 504 can complete the product packaging work directly during unloading, saving processes and effectively improving efficiency.

[0090] VI. First-stage material arrangement mechanism 6: Refer to Figure 3 , Figure 12 The first product discharge mechanism 6 includes a first discharge bracket 601, a first conveyor belt 602 wound on the first discharge bracket 601, and a first discharge motor 603 that drives the first conveyor belt 602. The first discharge motor 603 is started to drive the first conveyor belt 602 to rotate, so as to discharge the defective products on the first conveyor belt 602.

[0091] VII. Secondary Product Dispensing Mechanism 7: Refer to Figure 3 , Figure 12 The second-stage discharge mechanism 7 includes a second discharge bracket 701, a second conveyor belt 702 wound around the second discharge bracket 701, and a second discharge motor 703 that drives the second conveyor belt 702. When the second discharge motor 703 is started, it drives the second conveyor belt 702 to rotate, so as to discharge the defective products on the second conveyor belt 702.

[0092] Example 3

[0093] A testing method applicable to the aforementioned comprehensive testing equipment for the airtightness and dimensions of pipe fitting 9, as described above, refers to... Figures 1 to 14 This includes the following steps:

[0094] S1. The worker places the pipe fitting 9 to be inspected into the loading workpiece plate 202, and each pipe fitting 9 corresponds to one positioning rib 2021;

[0095] S2. The cross-zone conveying mechanism 8 is started, and the pipe 9 on the loading workpiece plate 202 is transferred to the airtightness testing seat 303 through the first conveying pneumatic finger 8016 in the first conveying component 801.

[0096] S3. The first push-pull cylinder 3013 is activated, pushing the airtightness test seat 303 to below the pressure plug 304 and connecting it to the first test pipe 3021. Then the vertical test cylinder 305 is activated to seal the pressure plug 304 at the port of the pipe fitting 9.

[0097] S4. Both the first on / off ball valve 3023 and the second on / off ball valve 3024 are connected to external fluid pipes. When the first on / off ball valve 3023 and the second on / off ball valve 3024 are opened, the fluid in the external fluid pipes enters the first detection pipe 3021 and the second detection pipe 3022 at the same speed and in the same amount.

[0098] S5. Control the fluid flow rate by observing the data fed back by the pressure sensor 306; at the same time, observe whether there is a leakage problem in the pipe fitting 9 under detection by observing the data fed back by the differential pressure sensor in the differential pressure transmitter 307.

[0099] S6. The first opening and closing ball valve 3023 and the second opening and closing ball valve 3024 are closed. The detection vertical cylinder 305 is started to raise the pressing plug 304 to make room.

[0100] If a leak is detected in the pipe fitting 9, the cross-zone conveying mechanism 8 is activated. The second conveying pneumatic finger 8026 in the second conveying assembly 802 grabs the pipe fitting 9 on the air tightness testing seat 303 and moves it into the first conveyor belt 602. The first discharge motor 603 is activated, which makes the first conveyor belt 602 run and discharges the leaking pipe fitting 9. Then the first push-pull cylinder 3013 drives the air tightness testing seat 303 to reset.

[0101] If the detected pipe fitting 9 does not have any leakage, the first push-pull cylinder 3013 drives the air tightness test seat 303 to return to its original position, the cross-zone conveying mechanism 8 is started, and the first conveying pneumatic finger 8016 in the first conveying component 801 grabs the pipe fitting 9 on the air tightness test seat 303 and moves it to the first test waiting component 401.

[0102] S7. The first conveying pneumatic finger 8016 in the first conveying assembly 801 grabs the pipe 9 in the first detection waiting assembly 401 and moves it to the go / no-go gauge 4063 in the horizontal camera detection assembly 402. Then, the horizontal detection camera 4022 and the light source plate 4024 are activated. The horizontal side dimension of the pipe 9 is detected by image comparison. During the detection process, the corresponding servo motor 4064 is activated and the pipe 9 is rotated, thereby realizing 360-degree full dimension detection.

[0103] S8. The tube 9 on the first detection fixture 4061 corresponding to the horizontal camera detection component 402 is grasped and moved to the second detection fixture 4038 of the second detection waiting component 403 by the first conveying pneumatic finger 8016 in the first conveying component 801.

[0104] If the side dimension is not qualified in step S7, the second conveying pneumatic finger 8026 in the second conveying component 802 will grab the pipe 9 on the second inspection waiting component 403 corresponding to the second inspection fixture 4038 and move it to the second conveying belt 702. The second discharge motor 703 will start to make the second conveying belt 702 run and discharge the pipe 9 with unqualified dimensions.

[0105] If the side dimension is qualified in step S7, the second push-pull cylinder 4033 is activated to push the second detection sliding seat 4032 forward, so that the second detection fixture 4038 moves to directly below the vertical detection camera 4042.

[0106] S9. Start the vertical inspection camera 4042 and inspect the upper end face dimensions of the pipe fitting 9 by comparing the images.

[0107] Next, the pneumatic flipping finger 4037 grabs the pipe 9 on the second inspection fixture 4038. The lifting cylinder 4035 pushes the pneumatic flipping finger 4037 up and makes room. Then, the flipping cylinder 4036 flips the pipe 9 180 degrees up and down. The lifting cylinder 4035 lowers so that the pipe 9 on the pneumatic flipping finger 4037 falls back onto the second inspection fixture 4038.

[0108] Restart the vertical inspection camera 4042 and inspect the lower end face dimensions of the pipe fitting 9 by comparing the images;

[0109] S10. If the dimensions of the upper and lower end faces are not up to standard in step S9, the second push-pull cylinder 4033 is activated to move the second inspection fixture 4038 to below the second conveying pneumatic finger 8026. Then, the second conveying pneumatic finger 8026 in the second conveying assembly 802 grabs the pipe 9 on the second inspection fixture 4038 and moves it into the second conveyor belt 702. The second discharge motor 703 is activated to make the second conveyor belt 702 run and discharge the pipe 9 with unqualified dimensions.

[0110] If the side dimensions are found to be acceptable in step S9, the second push-pull cylinder 4033 is activated to move the second inspection fixture 4038 below the first conveying pneumatic finger 8016. Then, the first conveying pneumatic finger 8016 in the first conveying assembly 801 grabs the pipe 9 on the second inspection fixture 4038 and moves it to the independent storage area 505 of the packaging box 503, thus completing all the inspection and unloading.

Claims

1. A comprehensive testing device for the airtightness and dimensions of pipe fittings, characterized in that, include: The workbench (1) and control device are divided into a loading area (101), an airtightness testing area (102), a size testing area (103), and a qualified product unloading area (104) from left to right. The feeding mechanism (2) is set in the feeding area (101) and includes a feeding moving module (201) and a feeding workpiece plate (202) driven by the feeding moving module (201). An airtightness testing mechanism (3) is set in an airtightness testing area (102) and consists of multiple sets of airtightness testing components (302) arranged side by side. Each set of airtightness testing components (302) includes a differential pressure transmitter (307) with a first testing pipe (3021) and a second testing pipe (3022), a first on / off ball valve (3023) connected to one end of the first testing pipe (3021), an airtightness testing seat (303) connected to the other end of the first testing pipe (3021) and used to place a pipe fitting (9), a pressure plug (304) used to seal one port of the pipe fitting (9), a vertical testing cylinder (305) used to drive the pressure plug (304) to rise and fall, a second on / off ball valve (3024) connected to one end of the second testing pipe (3022), a pressure sensor (306) connected to the other end of the second testing pipe (3022), and a differential pressure sensor connected to the differential pressure transmitter (307). The size detection mechanism (4) is set in the size detection area (103) and includes a first detection waiting component (401), a horizontal camera detection component (402), a second detection waiting component (403) arranged from left to right, and a vertical camera detection component (404) arranged behind the second detection waiting component (403); the size detection mechanism (4) is also provided with a light shield (405), and the light shield (405) is provided with a passage groove (4051) for the cross-area conveying mechanism (8) to pass through; The unloading mechanism (5) is set in the qualified product unloading area (104) and includes an unloading moving module (501) and an unloading workpiece plate (502) driven by the unloading moving module (501). The first product discharge mechanism (6) is located between the airtightness detection area (102) and the size detection area (103); The second product feeding mechanism (7) is located between the size inspection area (103) and the qualified product unloading area (104); A cross-regional conveying mechanism (8) is installed across the left and right ends of the workbench (1); The cross-regional conveying mechanism (8) includes a first conveying component (801) and a second conveying component (802) arranged in parallel. The first conveying assembly (801) includes a first conveying bracket (8011), a first spur tooth track (8012) fixed on the first conveying bracket (8011), a first drive gear (8013) meshing and engaging with the first spur tooth track (8012), a first reduction motor (8014) acting on the first drive gear (8013), a first conveying support plate (8015), and a first conveying pneumatic finger (8016) fixed on the first conveying support plate (8015). The second conveying assembly (802) includes a second conveying bracket (8021), a second spur gear (8022) fixed on the second conveying bracket (8021), a second drive gear (8023) meshing and transmitting with the second spur gear (8022), a second reduction motor (8024) acting on the second drive gear (8023), a second conveying support plate (8025), and a second conveying pneumatic finger (8026) fixed on the second conveying support plate (8025). The first detection waiting component (401) and the horizontal camera detection component (402) both include a first detection fixture (4061), a rotating shaft (4062) passing through the first detection fixture (4061), a go / no-go gauge (4063) installed on the upper end of the rotating shaft (4062), and a servo motor (4064) connected to the lower end of the rotating shaft (4062); The horizontal camera detection assembly (402) further includes a horizontal camera mounting bracket (4021), a horizontal detection camera (4022) fixed on the horizontal camera mounting bracket (4021), a horizontal focusing lens (4023) disposed in front of the horizontal detection camera (4022), and a light source plate (4024); wherein the horizontal detection camera (4022) and the horizontal focusing lens (4023) are located behind the first detection fixture (4061), and the light source plate (4024) is located in front of the first detection fixture (4061); The second detection waiting assembly (403) includes a second detection guide rail (4031), a second detection sliding seat (4032) slidably mounted on the second detection guide rail (4031), a second push-pull cylinder (4033) acting on the second detection sliding seat (4032), a flip support plate (4034) fixed on the second detection sliding seat (4032), a second detection fixture seat (4038), a lifting cylinder (4035) fixed on the flip support plate (4034), a flip cylinder (4036) acting on the lifting cylinder (4035) and arranged in the front-back direction, and a pneumatic flipping finger (4037) acting on the flip cylinder (4036). The vertical camera detection assembly (404) further includes a vertical camera mounting bracket (4041), a vertical detection camera (4042) fixed on the vertical camera mounting bracket (4041), and a vertical focusing lens (4043) disposed below the vertical detection camera (4042); The pneumatic flipping finger (4037) includes a left joint finger and a right joint finger (4037a), and the left joint finger and the right joint finger are staggered in the vertical direction to clamp the tube (9) at different height positions respectively.

2. The comprehensive testing equipment for airtightness and dimensions of pipe fittings according to claim 1, characterized in that: The airtightness testing component (302) further includes a first testing guide rail (3011) disposed in the airtightness testing area (102), a first testing sliding seat (3012) slidably disposed on the first testing guide rail (3011), a first push-pull cylinder (3013) acting on the first testing sliding seat (3012), and the airtightness testing seat (303) being fixed on the first testing sliding seat (3012).

3. The comprehensive testing equipment for airtightness and dimensions of pipe fittings according to claim 2, characterized in that: The first conveying bracket (8011) and the second conveying bracket (8021) are each provided with a plurality of fixed position feedback plates (803), and the first conveying support plate (8015) and the second conveying support plate (8025) are each provided with a movable position sensor (804). The fixed position feedback plates (803) and the movable position sensors (804) are inductively connected.

4. The comprehensive testing equipment for airtightness and dimensions of pipe fittings according to claim 3, characterized in that: The loading workpiece plate (202) is provided with positioning ribs (2021); The workpiece plate (502) is provided with a packaging box (503) on its periphery. The packaging box (503) is provided with a pearl cotton partition (504) to divide the interior of the packaging box (503) into several independent storage areas (505).

5. The comprehensive testing equipment for airtightness and dimensions of pipe fittings according to claim 4, characterized in that: The first product discharge mechanism (6) includes a first discharge bracket (601), a first conveyor belt (602) wound on the first discharge bracket (601), and a first discharge motor (603) that drives the first conveyor belt (602). The second product discharge mechanism (7) includes a second discharge bracket (701), a second conveyor belt (702) wound on the second discharge bracket (701), and a second discharge motor (703) that drives the second conveyor belt (702).

6. A testing method applicable to the comprehensive testing equipment for airtightness and dimensions of pipe fittings as described in claim 5, characterized in that, Includes the following steps: S1. The worker places the pipe fitting (9) to be inspected into the loading workpiece plate (202), and each pipe fitting (9) corresponds to one positioning rib (2021); S2. The cross-regional conveying mechanism (8) is started, and the pipe fitting (9) on the loading workpiece plate (202) is transferred to the airtightness testing seat (303) through the first conveying pneumatic finger (8016) in the first conveying assembly (801); S3. The first push-pull cylinder (3013) is activated, pushing the airtightness test seat (303) to the bottom of the pressure plug (304) and connecting it to the first test pipe (3021). Then the vertical test cylinder (305) is activated to seal the pressure plug (304) at the port of the pipe fitting (9). S4. Both the first on / off ball valve (3023) and the second on / off ball valve (3024) are connected to external fluid pipes. When the first on / off ball valve (3023) and the second on / off ball valve (3024) are opened, the fluid in the external fluid pipes enters the first detection pipe (3021) and the second detection pipe (3022) at the same speed and in the same amount. S5. Control the fluid flow rate by observing the data fed back by the pressure sensor (306); at the same time, observe whether there is a leakage problem in the pipe fitting (9) under test by observing the data fed back by the differential pressure sensor in the differential pressure transmitter (307); S6. The first and second ball valves (3023 and 3024) are closed, and the vertical cylinder (305) is activated to raise the pressure plug (304) to make room. If a leak is detected in the pipe fitting (9), the cross-regional conveying mechanism (8) is activated. The second conveying pneumatic finger (8026) in the second conveying assembly (802) grabs the pipe fitting (9) on the airtightness testing seat (303) and moves it into the first conveyor belt (602). The first discharge motor (603) is activated to make the first conveyor belt (602) run and discharge the leaking pipe fitting (9). Then the first push-pull cylinder (3013) drives the airtightness testing seat (303) to reset. If the detected pipe fitting (9) has no leakage, the first push-pull cylinder (3013) drives the air tightness test seat (303) to return to its original position, the cross-area conveying mechanism (8) is started, and the pipe fitting (9) on the air tightness test seat (303) is grabbed and moved to the first test waiting assembly (401) by the first conveying pneumatic finger (8016) in the first conveying assembly (801); S7. The first conveying pneumatic finger (8016) in the first conveying assembly (801) grabs the pipe (9) in the first detection waiting assembly (401) and moves it to the go / no-go gauge (4063) in the horizontal camera detection assembly (402). Then, the horizontal detection camera (4022) and the light source plate (4024) are activated. The horizontal side dimension of the pipe (9) is detected by image comparison. During the detection process, the corresponding servo motor (4064) is activated and the pipe (9) is rotated, thereby realizing 360-degree full dimension detection. S8. The pipe (9) on the first detection fixture (4061) corresponding to the horizontal camera detection component (402) is picked up by the first conveying pneumatic finger (8016) in the first conveying component (801) and moved to the second detection fixture (4038) of the second detection waiting component (403). If the side dimension is not qualified in step S7, the second conveying pneumatic finger (8026) in the second conveying assembly (802) will grab the pipe (9) on the second inspection waiting assembly (403) corresponding to the second inspection fixture (4038) and move it to the second conveying belt (702). The second discharge motor (703) will start to make the second conveying belt (702) run and discharge the pipe (9) with unqualified dimensions. If the side dimension is qualified in step S7, the second push-pull cylinder (4033) is activated to push the second detection sliding seat (4032) forward, so that the second detection fixture (4038) moves to directly below the vertical detection camera (4042); S9. Start the vertical inspection camera (4042) and perform upper end face dimension inspection on the pipe fitting (9) by image comparison; Next, the pneumatic flipping finger (4037) grips the pipe (9) on the second inspection fixture (4038) in a vertically staggered manner. The lifting cylinder (4035) pushes the pneumatic flipping finger (4037) up and makes room. Then, the flipping cylinder (4036) flips the pipe (9) 180 degrees up and down. The lifting cylinder (4035) descends so that the pipe (9) on the pneumatic flipping finger (4037) falls back onto the second inspection fixture (4038). Restart the vertical inspection camera (4042) and inspect the lower end face dimensions of the pipe fitting (9) by comparing the images; S10. If the dimensions of the upper and lower end faces are not up to standard in step S9, the second push-pull cylinder (4033) is activated to move the second inspection fixture (4038) to below the second conveying pneumatic finger (8026). Then, the second conveying pneumatic finger (8026) in the second conveying assembly (802) grabs the pipe (9) on the second inspection fixture (4038) and moves it to the second conveyor belt (702). The second discharge motor (703) is activated to make the second conveyor belt (702) run and discharge the pipe (9) with unqualified dimensions. If the dimensions of the upper and lower end faces are qualified in step S9, the second push-pull cylinder (4033) is activated to move the second inspection fixture (4038) to below the first conveying pneumatic finger (8016). Then, the first conveying pneumatic finger (8016) in the first conveying assembly (801) grabs the pipe (9) on the second inspection fixture (4038) and moves it to the independent storage area (505) of the packaging box (503) to achieve all inspections and unloading.

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