A plastic oil pipe gas tightness detection device

Abstract

The utility model relates to airtightness detection equipment technical field, proposes a kind of plastic oil pipe airtightness detection device, including detection table, conveying unit, airtightness detection unit, laser marking unit and sorting discharge unit, conveying unit is provided with movable workpiece carrying end, workpiece carrying end can pass each unit in turn, airtightness detection device further includes laser range finder, laser range finder is towards the sealing ring installation position of workpiece to be detected, airtightness detection unit is also provided with reinspection wedge and microswitch, reinspection wedge one side is inclined plane, the other side abuts against microswitch, reinspection wedge one end is hingedly arranged on airtightness detection unit, airtightness detection unit can lift and abut against the interface of workpiece to be detected, reinspection wedge can be close to workpiece to be detected with airtightness detection unit, the inclined plane of reinspection wedge and the sealing ring of workpiece to be detected abut against. Solve the problem that airtightness detection equipment in the prior art is not accurate to the sealing ring detection of workpiece to be detected, leads to the false alarm of airtightness detection.

Description

Technical Field

[0001] This utility model relates to the technical field of airtightness testing equipment, specifically to an airtightness testing device for plastic oil pipes. Background Technology

[0002] Plastic oil pipes are used to connect high-pressure oil pipe joints in the static clutch mechanism. They have very high requirements for sealing performance, therefore, airtightness testing is necessary after production to ensure product quality and reliability. Plastic oil pipes generally require the installation of sealing rings, which serve a sealing function during sealing tests. However, the sealing rings on the oil pipes may not be installed correctly or multiple rings may be installed, leading to false alarms during sealing tests. Therefore, a new airtightness testing device is needed to address this issue. Utility Model Content

[0003] This invention proposes a plastic oil pipe air tightness testing device, which solves the problem of false alarms caused by inaccurate detection of the sealing ring of the test piece by existing air tightness testing equipment.

[0004] The technical solution of this utility model is as follows: A plastic oil pipe airtightness testing device includes a testing platform, a conveying unit, an airtightness testing unit, a laser marking unit, and a sorting and discharging unit. The conveying unit has a movable workpiece carrying end, which can sequentially pass through the airtightness testing unit, the laser marking unit, and the sorting and discharging unit. The airtightness testing device also includes a laser rangefinder, which faces the sealing ring mounting position of the workpiece to be tested. The airtightness testing unit is also equipped with a re-inspection wedge and a micro switch. One side of the re-inspection wedge is inclined, and the other side abuts against the micro switch. One end of the re-inspection wedge is hinged to the airtightness testing unit. The airtightness testing unit can be raised and lowered to abut against the interface of the workpiece to be tested. The re-inspection wedge can move closer to the workpiece to be tested along with the airtightness testing unit, and the inclined surface of the re-inspection wedge abuts against the sealing ring of the workpiece to be tested.

[0005] The conveying unit includes a stepping telescopic drive unit, a transport unit, a transport frame, a support rail, and multiple positioning blocks. The positioning blocks are spaced apart on the transport frame and correspond to the transport frame. The transport frame is located on the telescopic end of the transport unit, which extends and retracts vertically. The transport unit is located on the telescopic end of the stepping telescopic drive unit, which extends and retracts horizontally. The support rail includes a first rail and a second rail, with a gap between the first rail and the second rail. The positioning blocks pass through the gap, and the transport frame corresponds to the gap.

[0006] The airtightness detection unit includes an airtightness lifting unit, a pressure head, and a pressure-holding nozzle. The pressure head and the pressure-holding nozzle are mounted on the telescopic end of the airtightness lifting unit. One end of the re-inspection wedge is hinged to one side of the pressure-holding nozzle, and the micro switch is mounted on the other side of the re-inspection wedge. The airtightness detection unit also includes a sealing telescopic unit and a sealing head. The second track is provided with a sealing through hole. The sealing telescopic unit is located below the second track, and the sealing head is located on the telescopic end of the sealing telescopic unit and can pass through the sealing through hole.

[0007] The sorting and unloading unit includes a sorting drive unit, a sorting chute, a finished product box, and a recycling box. Both ends of the sorting chute are open. The sorting chute is located at the rotating end of the sorting drive unit. The finished product box and the recycling box are respectively located on both sides of the sorting chute. The sorting drive unit drives the sorting chute to tilt toward the finished product box or toward the recycling box.

[0008] The working principle and beneficial effects of this utility model are as follows: This utility model discloses a plastic oil pipe airtightness testing device. A conveying unit is set on the testing platform to transport the workpiece to be tested, i.e., the oil pipe. The oil pipe is transported from the installation position to the airtightness testing unit, the laser marking unit, and the sorting and unloading unit in sequence. When the oil pipe is transported to the airtightness testing unit, the airtightness testing unit will descend to perform an airtightness test. Before the test, a laser rangefinder located on one side of the oil pipe checks whether a sealing ring is installed on the oil pipe. At the same time, the inclined surface of the re-inspection wedge, which is hinged on the airtightness testing unit, will contact the sealing ring installed on the oil pipe as the height decreases. If the sealing ring is installed in place and has not been reinstalled, the re-inspection wedge will not be squeezed by the sealing ring and trigger the micro switch. If the sealing ring is reinstalled, the inclined surface of the re-inspection wedge will squeeze the micro switch under the contact of the sealing ring, thereby triggering it. This indicates that there is a problem with the installation of the sealing ring. This solves the problem of inaccurate detection of the sealing ring of the workpiece in the prior art, which leads to false alarms in the airtightness test. Attached Figure Description

[0009] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0010] Figure 1 Axonometric view of the structure of this utility model Figure 1 ; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 Axonometric view of the structure of this utility model Figure 2 ; Figure 4 for Figure 3 A magnified view of a section at point B in the middle; In the diagram: 1. Inspection table, 2. Laser marking unit, 3. Laser rangefinder, 4. Re-inspection wedge, 5. Micro switch, 6. Stepper telescopic drive unit, 7. Conveying unit, 8. Transport frame, 9. Supporting track, 10. Positioning block, 11. First track, 12. Second track, 13. Airtight lifting unit, 14. Pressure head, 15. Pressure maintaining air nozzle, 16. Sealing telescopic unit, 17. Sealing head, 18. Sorting drive unit, 19. Sorting chute, 20. Finished product box, 21. Recycling box. Detailed Implementation

[0011] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0012] like Figures 1-4 As shown in the figure, this embodiment proposes a plastic oil pipe airtightness testing device. The airtightness testing device includes a testing platform 1, a conveying unit, an airtightness testing unit, a laser marking unit 2, and a sorting and discharging unit. The conveying unit is provided with a movable workpiece carrying end, which can pass through the airtightness testing unit, the laser marking unit 2, and the sorting and discharging unit in sequence. The airtightness testing device also includes a laser rangefinder 3, which faces the sealing ring installation position of the workpiece to be tested. The airtightness testing unit is also provided with a re-inspection wedge 4 and a micro switch 5. One side of the re-inspection wedge 4 is an inclined surface, and the other side abuts against the micro switch 5. One end of the re-inspection wedge 4 is hinged to the airtightness testing unit. The airtightness testing unit can be raised and lowered to abut against the interface of the workpiece to be tested. The re-inspection wedge 4 can move closer to the workpiece to be tested along with the airtightness testing unit. The inclined surface of the re-inspection wedge 4 abuts against the sealing ring of the workpiece to be tested.

[0013] In this embodiment, a plastic oil pipe airtightness testing device is disclosed. A conveying unit is set on the testing table 1 to transport the workpiece to be tested, i.e., the oil pipe. The oil pipe is transported from the installation position to the airtightness testing unit, the laser marking unit 2, and the sorting and unloading unit in sequence. When the oil pipe is transported to the airtightness testing unit, the airtightness testing unit will descend to perform airtightness testing. Before the test, the laser rangefinder 3 located on one side of the oil pipe checks whether a sealing ring is installed on the oil pipe. At the same time, the inclined surface of the re-inspection wedge 4, which is hinged on the airtightness testing unit, will contact the sealing ring installed on the oil pipe as the height decreases. If the sealing ring is installed in place and has not been reinstalled, the re-inspection wedge 4 will not be squeezed by the sealing ring and trigger the micro switch 5. If the sealing ring is reinstalled, the inclined surface of the re-inspection wedge 4 will squeeze the micro switch 5 under the contact of the sealing ring, thereby triggering it. In this case, it is considered that there is a problem with the installation of the sealing ring, and the subsequent testing work continues.

[0014] The conveying unit includes a stepping telescopic drive unit 6, a transport unit 7, a transport frame 8, a supporting rail 9, and multiple positioning blocks 10. The positioning blocks 10 are spaced apart on the transport frame 8 and correspond to the transport frame 8. The transport frame 8 is located on the telescopic end of the transport unit 7, which extends and retracts vertically. The transport unit 7 is located on the telescopic end of the stepping telescopic drive unit 6, which extends and retracts horizontally. The supporting rail 9 includes a first rail 11 and a second rail 12, with a gap between the first rail 11 and the second rail 12. The positioning blocks 10 pass through the gap, and the transport frame 8 corresponds to the gap.

[0015] In this embodiment, the conveying unit is used to sequentially transport the workpiece to be inspected, i.e., the oil pipe, from the placement station to the airtightness inspection, laser marking, and sorting and unloading stations. A support rail 9 is installed on the inspection table 1. The support rail 9 is divided into two parallel rails, namely the first rail 11 and the second rail 12. Multiple positioning blocks 10 are placed at intervals on the transport frame 8. The oil pipe is positioned on the positioning block 10. Between the first rail 11 and the second rail 12, a conveying structure for step-by-step transport of the positioning block 10 is provided below. The step-by-step telescopic drive unit 6 drives the transport unit 7 to move horizontally according to the step distance. The transport unit 7 extends and retracts vertically, driving the transport frame 8 to move up and down. The transport frame 8 can drive the positioning block 10 to move according to the step distance. The first rail 11 and the second rail 12 carry the oil pipe when the positioning block 10 moves step by step, thereby realizing the transport.

[0016] The airtightness detection unit includes an airtightness lifting unit 13, a pressure head 14, and a pressure-holding nozzle 15. The pressure head 14 and the pressure-holding nozzle 15 are disposed on the telescopic end of the airtightness lifting unit 13. One end of the re-inspection wedge 4 is hinged to one side of the pressure-holding nozzle 15. The micro switch 5 is disposed on the other side of the re-inspection wedge 4. The airtightness detection unit also includes a sealing telescopic unit 16 and a sealing head 17. The second track 12 is provided with a sealing through hole. The sealing telescopic unit 16 is disposed below the second track 12. The sealing head 17 is disposed on the telescopic end of the sealing telescopic unit 16 and can pass through the sealing through hole.

[0017] In this embodiment, during the airtightness test, the oil pipe is pressed and fixed in position by the pressure head 14 on the airtightness lifting unit 13, and the other opening of the oil pipe is sealed by the sealing head 17 of the sealing telescopic unit 16. The telescopic end of the airtightness lifting unit can also be equipped with a corresponding abutment post to further improve the sealing effect. The pressure-holding nozzle 15 is connected to and sealed with the upper interface of the oil pipe, and air is pressurized and held to detect whether there is a leak in the oil pipe. When the pressure is stable and there is no leakage, it is considered a qualified product. If the pressure continues to drop, it is considered a defective product. Furthermore, qualified and defective products are marked with laser marks below the laser marking unit 2.

[0018] The sorting and discharging unit includes a sorting drive unit 18, a sorting chute 19, a finished product box 20, and a recycling box 21. Both ends of the sorting chute 19 are open. The sorting chute 19 is located at the rotating end of the sorting drive unit 18. The finished product box 20 and the recycling box 21 are respectively located on both sides of the sorting chute 19. The sorting drive unit 18 drives the sorting chute 19 to tilt toward the finished product box 20 or toward the recycling box 21.

[0019] In this embodiment, after marking is completed, the oil pipe is marked and transported to the sorting and unloading unit. Part of the oil pipe is supported by the positioning block 10, and another part is supported by the second track 12. As it moves out of the range supported by the second track 12, the item to be inspected falls to the sorting chute 19. When the oil pipe is a qualified product, the sorting drive unit 18 rotates to tilt the sorting chute 19 toward the finished product box 20. When the oil pipe is an unqualified product, the sorting drive unit 18 rotates to tilt the sorting chute 19 toward the recycling box 21, thus achieving sorting.

[0020] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for detecting the airtightness of plastic oil pipes, characterized in that, The airtightness testing device includes a testing platform (1), a conveying unit, an airtightness testing unit, a laser marking unit (2), and a sorting and unloading unit. The conveying unit is provided with a movable workpiece bearing end. The workpiece bearing end can pass through the airtightness testing unit, the laser marking unit (2), and the sorting and unloading unit in sequence. The airtightness testing device also includes a laser rangefinder (3). The laser rangefinder (3) faces the sealing ring installation position of the workpiece to be tested. The airtightness testing unit is also provided with a re-inspection wedge (4) and a micro switch (5). One side of the re-inspection wedge (4) is an inclined surface, and the other side abuts against the micro switch (5). One end of the re-inspection wedge (4) is hinged on the airtightness testing unit. The airtightness testing unit can be raised and lowered to abut against the interface of the workpiece to be tested. The re-inspection wedge (4) can move closer to the workpiece to be tested along with the airtightness testing unit. The inclined surface of the re-inspection wedge (4) abuts against the sealing ring of the workpiece to be tested.

2. The plastic oil pipe airtightness testing device according to claim 1, characterized in that, The conveying unit includes a step-telescopic drive unit (6), a transport unit (7), a transport frame (8), a support rail (9), and multiple positioning blocks (10). The positioning blocks (10) are spaced apart on the transport frame (8). The positioning blocks (10) correspond to the transport frame (8). The transport frame (8) is located on the telescopic end of the transport unit (7). The transport unit (7) extends and retracts in the vertical direction. The transport unit (7) is located on the telescopic end of the step-telescopic drive unit (6). The step-telescopic drive unit (6) extends and retracts in the horizontal direction. The support rail (9) includes a first rail (11) and a second rail (12). There is a gap between the first rail (11) and the second rail (12). The positioning blocks (10) pass through the gap and the transport frame (8) corresponds to the gap.

3. The plastic oil pipe airtightness testing device according to claim 2, characterized in that, The airtightness detection unit includes an airtightness lifting unit (13), a pressure head (14), and a pressure-holding nozzle (15). The pressure head (14) and the pressure-holding nozzle (15) are located on the telescopic end of the airtightness lifting unit (13). One end of the re-inspection wedge (4) is hinged to one side of the pressure-holding nozzle (15). The micro switch (5) is located on the other side of the re-inspection wedge (4). The airtightness detection unit also includes a sealing telescopic unit (16) and a sealing head (17). The second track (12) is provided with a sealing through hole. The sealing telescopic unit (16) is located below the second track (12). The sealing head (17) is located at the telescopic end of the sealing telescopic unit (16) and can pass through the sealing through hole.

4. The plastic oil pipe airtightness testing device according to claim 2, characterized in that, The sorting and discharging unit includes a sorting drive unit (18), a sorting chute (19), a finished product box (20), and a recycling box (21). Both ends of the sorting chute (19) are open. The sorting chute (19) is located at the rotating end of the sorting drive unit (18). The finished product box (20) and the recycling box (21) are respectively located on both sides of the sorting chute (19). The sorting drive unit (18) drives the sorting chute (19) to tilt toward the finished product box (20) or toward the recycling box (21).

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