A hydrogen storage cylinder inner liner defect detection device

Abstract

The present invention belongs to the technical field of hydrogen cylinder detection, and in particular relates to a defect detection device for the inner liner of a hydrogen storage cylinder, including a support plate. A driving motor is fixedly connected to the lower surface of the support plate, and the output end of the driving motor passes through the upper surface of the support plate. The present invention enables the defect detection device for the inner liner of a hydrogen storage cylinder to have the functions of automatic ultrasonic defect detection and automatic visual detection, can improve the accuracy of the detection results of the inner wall defects of the hydrogen storage cylinder inner liner, and can timely detect the defects of the hydrogen storage cylinder inner liner, avoiding subsequent processing of the hydrogen storage cylinder inner liner with defects, further improving the reliability of the use of the defect detection device for the hydrogen storage cylinder inner liner. Moreover, the defect detection device for the hydrogen storage cylinder inner liner also has the function of intermittently automatically applying a coupling agent during the ultrasonic detection process, which not only can reduce the labor intensity of the staff, but also improves the convenience and efficiency of the ultrasonic detection of the defects of the hydrogen storage cylinder inner liner, and at the same time can avoid the waste caused by excessive use of the coupling agent.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen cylinder detection, and in particular relates to a hydrogen storage bottle liner defect detection device. Background Art

[0002] As an important secondary energy source that has attracted much attention in the 21st century, hydrogen energy has significant advantages such as abundant resources, high combustion value, cleanliness and renewability. With the vigorous development of fuel cells and fuel cell vehicle technologies, safe and efficient hydrogen storage technology has become the core element for the widespread application of hydrogen energy. Therefore, the inner liner of the hydrogen storage bottle must be strictly tested for safety during the production process, especially the inner liner of the hydrogen storage bottle before the side bottle mouth is formed. Testing at this stage can detect potential defects as early as possible, and then take timely repair or scrapping measures for defective blanks, effectively avoiding more costs in subsequent processing links, and effectively reducing production costs. For example, the patent with authorization announcement number CN213302103U discloses a small longitudinal ultrasonic guided wave probe for hydrogen storage cylinder detection.

[0003] At present, when inspecting the defects of hydrogen storage bottle liner blanks, due to the extremely narrow internal space of the hydrogen storage bottle liner, the staff usually use ultrasonic probes to conduct comprehensive inspections on the outside of the hydrogen storage bottle liner blanks. However, due to the limitations of the inspection position and the interference of inspection errors, it is very easy to ignore the tiny defects on the inner wall of the hydrogen storage bottle liner blanks. These missed tiny defects will be further enlarged during the forming process of the hydrogen storage bottle liner, which will not only seriously affect the accuracy of the defect detection of the hydrogen storage bottle liner blanks, reduce the reliability of the use of the hydrogen storage bottle liner inspection equipment, but also very likely to bring serious safety hazards to the hydrogen storage bottle liner products;

[0004] In addition, when using an ultrasonic probe to inspect the outer wall of the hydrogen storage bottle liner blank, it is necessary to manually apply a coupling agent to ensure that the ultrasonic probe is in full contact with the surface of the hydrogen storage bottle liner blank. However, the manual operation of applying a coupling agent to the entire outer wall of the hydrogen storage bottle liner blank is extremely inconvenient, which not only reduces the convenience and efficiency of the hydrogen storage bottle liner inspection equipment in detecting defects in the hydrogen storage bottle liner blank, but also greatly increases the labor intensity of the staff. At the same time, during the manual application of the coupling agent, the amount of coupling agent applied is difficult to control, and coupling agent waste is likely to occur.

[0005] To this end, we propose a hydrogen storage bottle liner defect detection device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a hydrogen storage bottle liner defect detection device in view of the above problems.

[0007] To achieve the above object, the present invention adopts the following technical solutions: A hydrogen storage bottle inner liner defect detection device, including a support plate, the lower surface of the support plate is fixedly connected with a driving motor, the output end of the driving motor passes through the upper surface of the support plate, a through hole one matching with the driving motor is opened on the upper surface of the support plate, the driving end of the driving motor is fixedly connected with a helical gear, the lower surface of the support plate is fixedly connected with a first electric push rod, the moving end of the first electric push rod is fixedly connected with a connecting bar, a moving slot matching with the connecting bar is opened on the side wall of the support plate, a through hole is opened on the outer wall of the connecting bar, and an extension tube is fixedly connected to the hole wall of the through hole, and a detection mechanism is fixedly connected to the side end of the extension tube;

[0008] The outer wall of the extension tube is hermetically and slidably sleeved with a positioning mechanism, and two support components are fixedly connected to the upper surface of the support plate;

[0009] The bottom end of the support plate is fixedly connected with four support legs, and a bottom plate is fixedly connected to the outer walls of the four support legs. A coupling agent supply mechanism, a PLC controller and an alarm are fixedly connected to the upper surface of the bottom plate;

[0010] A connecting bearing is fixedly sleeved on the outer wall of one of the support legs, a bracket is fixedly connected to the outer wall of the connecting bearing, and a touch screen computer is fixedly connected to the outer wall of the bracket.

[0011] In the above-mentioned hydrogen storage bottle inner liner defect detection device, the detection mechanism includes a plurality of elastic rubber rods fixedly connected to the inner wall of the side end of the extension tube, a corrugated tube is fixedly connected to the outer wall of the side end of the extension tube, a CCD camera is fixedly connected to the inner wall of the corrugated tube, the outer wall of the CCD camera is fixedly connected to the side ends of the plurality of elastic rubber rods, a fixing ring is fixedly connected to the inner wall of the extension tube, a second electric push rod is fixedly connected to the inner wall of the fixing ring, a moving rod is fixedly connected to the side end of the second electric push rod, two moving through holes matching with the moving rod are opened on the rod wall of the extension tube, a pull rope is fixedly connected to the rod wall of the moving rod, an extension block is fixedly connected to the outer wall of the CCD camera, the outer wall of the extension block is fixedly connected to the side end of the pull rope, and an ultrasonic detection component is fixedly connected to the side of the extension block away from the pull rope.

[0012] In the above-mentioned hydrogen storage bottle inner liner defect detection device, two symmetrically distributed LED supplementary light sources are fixedly connected to the outer wall of the extension tube close to the CCD camera.

[0013] In the above-mentioned hydrogen storage bottle inner liner defect detection device, the ultrasonic detection component includes a limiting cylinder fixedly connected to the outer wall of the extension block. A T-shaped rod is movably connected to the inner wall of the limiting cylinder. A positioning spring is fixedly connected to the outer walls of the T-shaped rod and the extension block. The outer end of the T-shaped rod is fixedly connected with an ultrasonic detection probe. A fixed frame is fixedly connected to the outer wall of the ultrasonic detection probe. A porous silica gel block is fixedly connected to the inner wall of the fixed frame. The outer wall of the porous silica gel block is in contact with the detection end of the ultrasonic probe. A delivery pipe is fixedly communicated with the outer wall of the fixed frame. The feeding end of the delivery pipe passes through the side end of the extension pipe and extends outwards. The data line of the ultrasonic detection probe passes through the side end of the extension pipe and is electrically connected to an ultrasonic detector main body. The outer wall of the ultrasonic detector main body is fixedly connected to the outer wall of the side end of the extension pipe.

[0014] In the above-mentioned hydrogen storage bottle inner liner defect detection device, the positioning mechanism includes a hollow ring that is hermetically and slidably sleeved on the outer wall of the extension pipe. Two sealing bearings are fixedly sleeved on the outer wall of the hollow ring. The outer ring walls of the two sealing bearings are fixedly connected to a connection ring. A transparent limiting cover is fixedly sleeved on the outer wall of the connection ring. A rubber expansion ring is fixedly connected to the inner wall of the transparent limiting cover. Two conduits are fixedly communicated with the outer wall of the rubber expansion ring. The intake ends of the two conduits are fixedly communicated with the outer wall of the connection ring. Air outlet holes are formed on the outer wall of the hollow ring located inside the connection ring. An intake pipe is fixedly communicated with the bottom end of the hollow ring. An outer helical gear ring that is vertically meshed with a helical gear is fixedly sleeved on the outer wall of the transparent limiting cover.

[0015] In the above-mentioned hydrogen storage bottle inner liner defect detection device, the support component includes two arc-shaped plates that are symmetrically and fixedly connected to the upper surface of the support plate. A plurality of universal ball bearings are fixedly connected to the inner walls of the arc-shaped plates.

[0016] In the above-mentioned hydrogen storage bottle inner liner defect detection device, the coupling agent supply mechanism includes a storage box fixedly connected to the upper surface of the bottom plate. A threaded addition hole is formed on the upper surface of the storage box, and a sealing plug is threadedly connected to the hole wall of the threaded addition hole. A coupling agent layer is filled inside the storage box. The bottom end of the delivery pipe passes through the top end of the storage box and extends downwards. A micro air pump is fixedly connected to the upper surface of the storage box. The air outlet end of the micro air pump is fixedly communicated with a three-way reversing solenoid valve. The top air outlet of the three-way reversing solenoid valve is fixedly communicated with the bottom end of the intake pipe. The side air outlet of the three-way reversing solenoid valve is fixedly communicated with a branch pipe. The air outlet end of the branch pipe is fixedly communicated with the top end of the storage box.

[0017] In the above-mentioned hydrogen storage bottle inner liner defect detection device, circular through holes are formed on the outer wall of the corrugated pipe, and a plurality of wire passing holes are formed on the outer wall of the fixed ring.

[0018] Compared with the existing technology, the advantages of a hydrogen storage bottle inner liner defect detection device are as follows:

[0019] Through the provided detection mechanism, positioning mechanism, alarm, and touch screen computer, when the inner liner blank of a hydrogen storage bottle with a qualified outer wall is subjected to inner wall defect detection before the bottle mouth is formed, first, the positioning mechanism and the support assembly limit the inner liner blank of the hydrogen storage bottle, and the detection mechanism is located at the arc side end of the inner liner blank of the hydrogen storage bottle. Then, the positioning mechanism drives the inner liner blank of the hydrogen storage bottle to rotate, and cooperates with the first electric push rod and the detection mechanism to conduct a comprehensive visual inspection of the inside of the inner liner blank of the hydrogen storage bottle. After the CCD camera transmits the taken photos to the touch screen computer, the touch screen computer will compare the photos. If the comparison is unqualified, the PLC controller controls the alarm to give an alarm, reminding the staff that there are potential defect hazards in the inner liner blank of the hydrogen storage bottle, and it is necessary to repair or scrap it in time to avoid wasting time and cost in subsequent processing. This mechanism endows the hydrogen storage bottle inner liner detection device with the function of automatic visual defect detection, can improve the accuracy of the inner wall defect detection result of the hydrogen storage bottle inner liner, timely detect the defects of the hydrogen storage bottle inner liner, and prevent the inner liner of the hydrogen storage bottle with defects from entering the subsequent processing link, thus improving the reliability of the use of the hydrogen storage bottle inner liner detection device.

[0020] Through the provided ultrasonic detection component, while the CCD camera conducts a comprehensive visual inspection of the inside of the inner liner blank of the hydrogen storage bottle, the ultrasonic detection probe conducts ultrasonic detection on the inner liner blank of the hydrogen storage bottle through the porous silica gel block that is in full contact with the inner wall of the inner liner blank of the hydrogen storage bottle. The main body of the ultrasonic detector can automatically analyze the data fed back by the ultrasonic detection probe. If a defect situation is found during the inspection, the main body of the ultrasonic detector will timely feedback to the PLC controller, and the PLC controller controls the alarm to give an alarm according to the defect electrical signal fed back by the main body of the ultrasonic detector, reminding the staff that there are potential defect hazards in the inner liner blank of the hydrogen storage bottle, and it is necessary to repair or scrap it in time to avoid wasting time and cost in subsequent processing. This mechanism endows the hydrogen storage bottle inner liner detection device with the function of automatic ultrasonic defect detection, can improve the accuracy of the inner wall defect detection result of the hydrogen storage bottle inner liner, timely detect the defects of the hydrogen storage bottle inner liner, and prevent the inner liner of the hydrogen storage bottle with defects from entering the subsequent processing link.

[0021] During the operation of the ultrasonic detection probe, the PLC controller also controls the micro air pump to start for 5 seconds every 1 minute through the set coupling agent supply mechanism. During these 5 seconds, the coupling agent supply mechanism supplies the coupling agent to the ultrasonic detection probe. On the one hand, the coupling agent can ensure full contact between the ultrasonic detection probe and the porous silica gel block, avoiding gaps that interfere with the propagation of ultrasonic waves. On the other hand, the coupling agent will also be discharged from the round hole channels at the edges of multiple porous silica gel blocks, enabling full contact between the outer wall of the porous silica gel block and the inner wall of the hydrogen storage bottle inner liner blank, eliminating the interference of pores on the ultrasonic detection work. By this intermittent supply method of the coupling agent, it can not only avoid excessive use of the coupling agent and achieve the purpose of saving, but also, after a defect alarm occurs, determine the position where the coupling agent interruption occurs inside the hydrogen storage bottle inner liner blank as the defect position based on the situation that the coupling agent is not continuously applied. This mechanism enables the hydrogen storage bottle inner liner defect detection device to have the function of intermittently and automatically applying the coupling agent during ultrasonic detection, which not only reduces the labor intensity of the staff, but also improves the convenience and efficiency of ultrasonic detection of hydrogen storage bottle inner liner defects, and at the same time avoids waste caused by excessive use of the coupling agent. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of a hydrogen storage bottle inner liner defect detection device provided by the present invention;

[0023] Figure 2 is a schematic structural diagram of a partial cross-section of a hydrogen storage bottle inner liner defect detection device provided by the present invention;

[0024] Figure 3 is a schematic structural diagram of a detection mechanism in a hydrogen storage bottle inner liner defect detection device provided by the present invention;

[0025] Figure 4 is Figure 3 a schematic structural diagram of the ultrasonic detection component in;

[0026] Figure 5 is a schematic structural diagram of a part of the second electric push rod in a hydrogen storage bottle inner liner defect detection device provided by the present invention;

[0027] Figure 6 is a schematic structural diagram of a bellows part in a hydrogen storage bottle inner liner defect detection device provided by the present invention;

[0028] Figure 7 is a schematic structural diagram of a positioning mechanism in a hydrogen storage bottle inner liner defect detection device provided by the present invention;

[0029] Figure 8 is a schematic structural diagram of a coupling agent supply mechanism in a hydrogen storage bottle inner liner defect detection device provided by the present invention;

[0030] Figure 9It is a schematic structural diagram of a porous silica gel block in a hydrogen storage cylinder inner liner defect detection device provided by the present invention.

[0031] In the figure: 1 support plate, 2 drive motor, 3 helical gear, 4 detection mechanism, 41 elastic rubber rod, 42 bellows, 43 CCD camera, 44 fixing ring, 45 second electric push rod, 46 moving rod, 47 moving through hole, 48 pull rope, 49 extension block, 5 positioning mechanism, 51 hollow ring, 52 sealing bearing, 53 connecting ring, 54 transparent limiting cover, 55 rubber expansion ring, 56 conduit, 57 air outlet hole, 58 air inlet pipe, 59 external helical gear ring, 6 support assembly, 61 arc plate, 62 universal ball, 7 coupling agent supply mechanism, 71 storage tank, 72 sealing plug, 73 coupling agent layer, 74 micro air pump, 75 three-way reversing solenoid valve, 76 branch pipe, 8 ultrasonic detection assembly, 81 limiting cylinder, 82 T-shaped rod, 83 positioning spring, 84 ultrasonic detection probe, 85 fixing frame, 86 porous silica gel block, 87 delivery pipe, 88 ultrasonic detector main body, 9 circular through hole, 10 first electric push rod, 11 connecting strip, 12 moving slot, 13 extension pipe, 14 support leg, 15 bottom plate, 16 PLC controller, 17 alarm, 18 connecting bearing, 19 bracket, 20 touch screen computer, 21 LED supplementary light source, 22 wire passing hole. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Such as Figures 1-9As shown in the figure, a hydrogen storage bottle inner liner defect detection device includes a support plate 1. A driving motor 2 is fixedly connected to the lower surface of the support plate 1. The output end of the driving motor 2 passes through the upper surface of the support plate 1. A through hole 1 is opened on the upper surface of the support plate 1 and is matched with the driving motor 2. The driving end of the driving motor 2 is fixedly connected to a helical gear 3. A first electric push rod 10 is fixedly connected to the lower surface of the support plate 1. The moving end of the first electric push rod 10 is fixedly connected to a connecting bar 11. A moving slot 12 matched with the connecting bar 11 is opened on the side wall of the support plate 1. A through hole is opened on the outer wall of the connecting bar 11, and an extension tube 13 is fixedly connected to the hole wall of the through hole. A detection mechanism 4 is fixedly connected to the side end of the extension tube 13. The detection mechanism 4 includes a plurality of elastic rubber rods 41 fixedly connected to the inner wall of the side end of the extension tube 13. A bellows 42 is fixedly connected to the outer wall of the side end of the extension tube 13. A CCD camera 43 is fixedly connected to the inner wall of the bellows 42. Two symmetrically distributed LED fill light sources 21 are fixedly connected to the outer wall of the extension tube 13 near the CCD camera 43. The LED fill light sources 21 can improve the clarity of the photos taken by the CCD camera 43. The outer wall of the CCD camera 43 is fixedly connected to the side ends of the plurality of elastic rubber rods 41. A fixing ring 44 is fixedly connected to the inner wall of the extension tube 13. A second electric push rod 45 is fixedly connected to the inner wall of the fixing ring 44. A moving rod 46 is fixedly connected to the side end of the second electric push rod 45. Two moving through holes 47 matched with the moving rod 46 are opened on the rod wall of the extension tube 13. A pull rope 48 is fixedly connected to the rod wall of the moving rod 46. An extension block 49 is fixedly connected to the outer wall of the CCD camera 43. The outer wall of the extension block 49 is fixedly connected to the side end of the pull rope 48. An ultrasonic detection component 8 is fixedly connected to the side of the extension block 49 away from the pull rope 48. This mechanism endows the hydrogen storage bottle inner liner detection device with the function of visual automatic defect detection, and can improve the accuracy of the detection results of the inner wall defects of the hydrogen storage bottle inner liner.

[0034] The ultrasonic detection assembly 8 includes a limiting cylinder 81 fixedly connected to the outer wall of the extension block 49. A T-shaped rod 82 is movably connected to the inner wall of the limiting cylinder 81. A positioning spring 83 is fixedly connected to the outer walls of the T-shaped rod 82 and the extension block 49. The outer end of the T-shaped rod 82 is fixedly connected to an ultrasonic detection probe 84. A fixing frame 85 is fixedly connected to the outer wall of the ultrasonic detection probe 84. A porous silica gel block 86 is fixedly connected to the inner wall of the fixing frame 85. The outer wall of the porous silica gel block 86 is in contact with the detection end of the ultrasonic probe. A delivery pipe 87 is fixedly communicated with the outer wall of the fixing frame 85. The feeding end of the delivery pipe 87 passes through the side end of the extension pipe 13 and extends outward. The data line of the ultrasonic detection probe 84 passes through the side end of the extension pipe 13 and is electrically connected to an ultrasonic detector main body 88. The outer wall of the ultrasonic detector main body 88 is fixedly connected to the outer wall of the side end of the extension pipe 13. This mechanism endows the hydrogen storage bottle inner liner detection equipment with the function of automatically detecting defects by ultrasonic waves, can improve the accuracy of the detection results of the inner wall defects of the hydrogen storage bottle inner liner, timely discover the defects of the hydrogen storage bottle inner liner, and avoid the hydrogen storage bottle inner liner with defects from entering the subsequent processing link.

[0035] A positioning mechanism 5 is hermetically and slidably sleeved on the outer wall of the extension pipe 13. The positioning mechanism 5 includes a hollow ring 51 hermetically and slidably sleeved on the outer wall of the extension pipe 13. Two sealing bearings 52 are fixedly sleeved on the outer wall of the hollow ring 51. A connecting ring 53 is fixedly connected to the outer walls of the outer rings of the two sealing bearings 52. A transparent limiting cover 54 is fixedly sleeved on the outer wall of the connecting ring 53. A rubber expansion ring 55 is fixedly connected to the inner wall of the transparent limiting cover 54. Two guide pipes 56 are fixedly communicated with the outer wall of the rubber expansion ring 55. The air inlet ends of the two guide pipes 56 are fixedly communicated with the outer wall of the connecting ring 53. An air outlet hole 57 is formed in the outer wall of the hollow ring 51 located inside the connecting ring 53. An air inlet pipe 58 is fixedly communicated with the bottom end of the hollow ring 51. An external helical gear ring 59 that is vertically meshed with the helical gear 3 is fixedly sleeved on the outer wall of the transparent limiting cover 54. This mechanism can stably limit the blank of the hydrogen storage bottle inner liner and can drive the blank of the hydrogen storage bottle inner liner to rotate for comprehensive defect detection.

[0036] Two support assemblies 6 are fixedly connected to the upper surface of the support plate 1. The support assemblies 6 include two arc-shaped plates 61 symmetrically and fixedly connected to the upper surface of the support plate 1. A plurality of universal balls 62 are fixedly connected to the inner walls of the arc-shaped plates 61. The plurality of universal balls 62 in the arc-shaped plates 61 can support the blank of the hydrogen storage bottle inner liner and can facilitate the rolling of the blank of the hydrogen storage bottle inner liner.

[0037] Four support legs 14 are fixedly connected to the bottom end of the support plate 1. The outer walls of the four support legs 14 are fixedly connected to a bottom plate 15 together. A couplant supply mechanism 7, a PLC controller 16 and an alarm 17 are fixedly connected to the upper surface of the bottom plate 15. The couplant supply mechanism 7 includes a storage tank 71 fixedly connected to the upper surface of the bottom plate 15. A threaded addition hole is opened on the upper surface of the storage tank 71, and a sealing plug 72 is threadedly connected to the inner wall of the threaded addition hole. A couplant layer 73 is filled inside the storage tank 71. The bottom end of the delivery pipe 87 passes through the top end of the storage tank 71 and extends downward. A micro air pump 74 is fixedly connected to the upper surface of the storage tank 71. The air outlet end of the micro air pump 74 is fixedly communicated with a three-way reversing solenoid valve 75. The top air outlet of the three-way reversing solenoid valve 75 is fixedly communicated with the bottom end of the intake pipe 58. The side air outlet of the three-way reversing solenoid valve 75 is fixedly communicated with a branch pipe 76. The air outlet end of the branch pipe 76 is fixedly connected to the top end of the storage tank 71. This mechanism enables the hydrogen storage bottle inner liner defect detection device to have the function of intermittently and automatically applying couplant during ultrasonic detection, which not only reduces the labor intensity of the staff, but also improves the convenience and efficiency of ultrasonic detection of hydrogen storage bottle inner liner defects, and at the same time avoids the waste caused by excessive use of couplant.

[0038] A connecting bearing 18 is fixedly sleeved on the outer wall of one of the support legs 14. A bracket 19 is fixedly connected to the outer wall of the connecting bearing 18. A touch screen computer 20 is fixedly connected to the outer wall of the bracket 19. A circular through hole 9 is opened on the outer wall of the bellows 42. A plurality of wire passing holes 22 are opened on the outer wall of the fixing ring 44. The plurality of wire passing holes 22 can facilitate the wires and pipelines to pass through the fixing ring 44.

[0039] The drive motor 2, the second electric push rod 45, the micro air pump 74, the three-way reversing solenoid valve 75, the alarm 17, the LED supplementary light source 21 and the first electric push rod 10 are all electrically connected to the output end of the PLC controller 16 through wires. The output ends of the ultrasonic detector main body 88 and the touch screen computer 20 are electrically connected to the input end of the PLC controller 16 through wires. The ultrasonic detection probe 84 is electrically connected to the input end of the ultrasonic detector main body 88 through a data cable. The CCD camera 43 is electrically connected to the input end of the touch screen computer 20 through a data cable. The above-mentioned energized devices and electrical connections are all prior arts and will not be elaborated here.

[0040] The operating principle of the present invention is described as follows: When the inner wall of the hydrogen storage bottle inner liner blank with qualified outer wall is detected for defects before the bottle mouth is formed, first, the hydrogen storage bottle inner liner blank is placed on two support components 6. At this time, a plurality of universal ball bearings 62 in the arc-shaped plate 61 can support the hydrogen storage bottle inner liner blank and facilitate the rolling of the hydrogen storage bottle inner liner blank. The open side end of the hydrogen storage bottle inner liner blank is located inside the transparent limit cover 54, and the rubber expansion ring 55 is located on the outer wall of the open side end of the hydrogen storage bottle inner liner blank. The detection mechanism 4 and the ultrasonic detection component 8 are placed on the inner wall of the arc-shaped side end of the hydrogen storage bottle inner liner blank. The porous silica gel block 86 is closely attached to the inner wall of the hydrogen storage bottle inner liner blank. Under the reverse push of the fixed frame 85 and the ultrasonic detection probe 84, the T-shaped rod 82 retracts into the limit cylinder 81, and the positioning spring 83 compresses to store energy and generates a resilience force;

[0041] Subsequently, the PLC controller 16 controls the micro air pump 74 and the three-way reversing solenoid valve 75 to be energized for 10 seconds. After the three-way reversing solenoid valve 75 is energized, the air guiding direction is changed, so that the air sucked by the micro air pump 74 enters the air inlet pipe 58 through the top outlet of the three-way reversing solenoid valve 75. The air in the air inlet pipe 58 then enters the rubber expansion ring 55 through the hollow ring 51, the air outlet hole 57 and the conduit 56, causing the rubber expansion ring 55 to expand and squeeze the outer wall of the side end of the hydrogen storage bottle inner liner blank, achieving the purpose of fixing the hydrogen storage bottle inner liner blank. After 10 seconds, the micro air pump 74 and the three-way reversing solenoid valve 75 are both powered off under the control of the PLC controller 16. After the three-way reversing solenoid valve 75 is powered off, the air guiding direction returns to the initial state, and the air in the air inlet pipe 58 remains stable;

[0042] Next, with the assistance of the LED supplementary light source 21, the CCD camera 43 starts to take pictures of the inner wall of the hydrogen storage bottle inner liner blank. The CCD camera 43 has an automatic focusing function, which can ensure that the taken pictures are clear. After the shooting is completed, the CCD camera 43 converts the picture data into an electrical signal and transmits it to the touch screen computer 20. The touch screen computer 20 is pre-installed with a program for comparing the pictures taken by the CCD camera 43, and a variety of preset defective and unqualified pictures are stored in this program. When the touch screen computer 20 receives the pictures taken by the CCD camera 43, the internal comparison program will automatically conduct a comparison. The specific principle is that the program extracts and analyzes the image features in the pictures through an image recognition algorithm, and matches them one by one with the features of the preset unqualified pictures. If the comparison result is inconsistent with all the preset defective and unqualified pictures, it indicates that the inner wall of the hydrogen storage bottle inner liner blank is qualified at this time. On the contrary, if the comparison result coincides with at least one of the preset various defective and unqualified pictures, it means that there are appearance defects on the inner wall of the hydrogen storage bottle inner liner blank. At this time, the touch screen computer 20 will send an unqualified electrical signal to the PLC controller 16. The PLC controller 16 controls the alarm 17 to alarm according to the received unqualified electrical signal, reminding the staff that there are defect hidden dangers in this hydrogen storage bottle inner liner blank and it needs to be repaired or scrapped in time to avoid wasting time and cost in subsequent processing. At the same time, the PLC controller 16 controls the drive end of the drive motor 2 to rotate, and the drive motor 2 drives the transparent limit cover 54 to slowly rotate through the helical gear 3 and the external helical gear ring 59;

[0043] Specifically, the PLC controller 16 controls the rotational speed of the drive motor 2. Moreover, the number of teeth of the outer helical gear ring 59 is much larger than that of the helical gear 3. When the helical gear 3 drives the outer helical gear ring 59, it has a decelerating effect. This decelerating effect can reduce the rotational speed of the inner liner blank of the hydrogen storage cylinder, thereby ensuring that the inner wall of the inner liner blank of the hydrogen storage cylinder can be comprehensively detected by the detection mechanism 4 and the ultrasonic detection component 8. In addition, the PLC controller 16 also controls the slow movement of the moving ends of the first electric push rod 10 and the second electric push rod 45. The moving end of the first electric push rod 10 drives the extension tube 13 to move slowly through the connecting bar 11, so that the extension tube 13 drives the detection mechanism 4 to move towards the transparent limiting cover 54, further ensuring the comprehensive detection of the inner wall of the inner liner blank of the hydrogen storage cylinder. The moving end of the second electric push rod 45 slowly pushes the moving rod 46 to move in the moving through hole 47. The moving rod 46 drives the extension block 49 to lift through the pull rope 48. When the extension block 49 lifts, it drives the corrugated pipe 42 and the elastic rubber rod 41 to bend. When the moving end of the second electric push rod 45 is fully extended, the CCD camera 43 is pulled by the pull rope 48 to lift and finally works in a vertical state. The time taken for the CCD camera 43 to lift from the horizontal state to the vertical state is the same as the time taken for the CCD camera 43 to comprehensively detect the inner wall of the arc-shaped part at the side end of the inner liner blank of the hydrogen storage cylinder. This can prevent the situation of partial omission in the detection of the inner wall of the arc-shaped part at the side end of the inner liner blank of the hydrogen storage cylinder due to the premature erection of the CCD camera 43. This mechanism endows the hydrogen storage cylinder inner liner detection equipment with the function of visual automatic defect detection, can improve the accuracy of the detection result of the inner wall defect of the hydrogen storage cylinder inner liner, timely detect the defects of the hydrogen storage cylinder inner liner, prevent the inner liner blank of the hydrogen storage cylinder with defects from entering the subsequent processing link, improve the reliability of the use of the hydrogen storage cylinder inner liner detection equipment, and at the same time avoid bringing serious potential safety hazards to the hydrogen storage cylinder inner liner products;

[0044] While the CCD camera 43 conducts a comprehensive visual inspection inside the inner liner blank of the hydrogen storage cylinder, the ultrasonic detection probe 84 performs ultrasonic detection on the inner liner blank of the hydrogen storage cylinder through the porous silica gel block 86 that is in full contact with the inner wall of the inner liner blank of the hydrogen storage cylinder. The working principle of ultrasonic detection is that the ultrasonic detection probe 84 emits ultrasonic waves towards the inner wall of the inner liner blank of the hydrogen storage cylinder. When the ultrasonic waves encounter defects on the inner wall, phenomena such as reflection, refraction, and scattering will occur. The ultrasonic wave signals reflected back are received by the ultrasonic detection probe 84. The probe converts the received signals into electrical signals and feeds them back to the main body 88 of the ultrasonic detector. The main body 88 of the ultrasonic detector can automatically analyze based on the data fed back by the ultrasonic detection probe 84. It has preset ultrasonic signal characteristic models in normal and defective states. By comparing and analyzing the received signals with these models, it determines whether there are defects. If defects are found during the inspection process, the main body 88 of the ultrasonic detector will promptly feed back to the PLC controller 16. The PLC controller 16 controls the alarm 17 to alarm according to the defective electrical signals fed back by the main body 88 of the ultrasonic detector, reminding the staff that there are potential defect hazards in the inner liner blank of the hydrogen storage cylinder and that it needs to be repaired or scrapped in a timely manner to avoid wasting time and cost in subsequent processing. Moreover, when the inner liner blank of the hydrogen storage cylinder is driven to rotate by the positioning mechanism 5 and the first electric push rod 10 drives the extension tube 13 to move through the connecting bar 11, the detection position of the ultrasonic detection probe 84 also changes accordingly. During the process of the CCD camera 43 being stretched and lifted, the ultrasonic detection probe 84 and the porous silica gel block 86 are always in full contact with the inner wall of the inner liner blank of the hydrogen storage cylinder under the resilience of the positioning spring 83, ensuring the reliability of the detection work of the ultrasonic detection probe 84. This mechanism endows the inner liner detection equipment of the hydrogen storage cylinder with the function of automatic defect ultrasonic detection, can improve the accuracy of the detection results of defects on the inner wall of the inner liner of the hydrogen storage cylinder, promptly discover defects in the inner liner of the hydrogen storage cylinder, avoid defective inner liners of the hydrogen storage cylinder from entering the subsequent processing link, further improve the reliability of the use of the inner liner detection equipment of the hydrogen storage cylinder, and at the same time avoid bringing serious safety hazards to the inner liner products of the hydrogen storage cylinder.

[0045] In addition, during the operation of the ultrasonic detection probe 84, the PLC controller 16 also controls the micro air pump 74 to start for 5 seconds every 1 minute. During these 5 seconds, the micro air pump 74 sucks in air and injects it into the storage tank 71, causing the air to fill the top of the storage tank 71. The injected air squeezes the coupling agent in the coupling agent layer 73 at the bottom of the storage tank 71, enabling the coupling agent to enter the delivery pipe 87 and be transported along the delivery pipe 87 to the fixed frame 85. The role of the coupling agent is crucial. On the one hand, it can ensure full contact between the ultrasonic detection probe 84 and the porous silica gel block 86, avoiding gaps that could interfere with the propagation of ultrasonic waves. On the other hand, the coupling agent also discharges from the round hole channels at the edges of multiple porous silica gel blocks 86, enabling full contact between the outer wall of the porous silica gel block 86 and the inner wall of the hydrogen storage bottle inner liner blank, eliminating the interference of pores on the ultrasonic detection work. As time goes by, after 1 minute, the coupling agent at the porous silica gel block 86 is gradually consumed. At this time, the PLC controller 16 controls the micro air pump 74 to work for another 5 seconds. The coupling agent supplied within these 5 seconds can continue to ensure the reliable operation of the porous silica gel block 86. By this intermittent supply method of the coupling agent, it can not only avoid excessive use of the coupling agent for the purpose of conservation, but also, after a defect alarm occurs, determine the position where the coupling agent interruption inside the hydrogen storage bottle inner liner blank is the defect position based on the situation that the coupling agent is not continuously applied, facilitating subsequent repair of the internal defects of the hydrogen storage bottle inner liner blank by the staff. This mechanism enables the hydrogen storage bottle inner liner defect detection device to have the function of intermittent automatic application of the coupling agent during ultrasonic detection, not only reducing the labor intensity of the staff, but also improving the convenience and efficiency of ultrasonic detection of hydrogen storage bottle inner liner defects, while avoiding waste caused by excessive use of the coupling agent.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hydrogen storage bottle inner liner defect detection device, including a support plate (1), characterized in that, The lower surface of the support plate (1) is fixedly connected with a driving motor (2). The output end of the driving motor (2) passes through the upper surface of the support plate (1). A through hole one matching the driving motor (2) is opened on the upper surface of the support plate (1). The driving end of the driving motor (2) is fixedly connected with a helical gear (3). The lower surface of the support plate (1) is fixedly connected with a first electric push rod (10). The moving end of the first electric push rod (10) is fixedly connected with a connecting strip (11). A moving slot (12) matching the connecting strip (11) is opened on the side wall of the support plate (1). A through hole is opened on the outer wall of the connecting strip (11), and the hole wall of the through hole is fixedly connected with an extension pipe (13). The side end of the extension pipe (13) is fixedly connected with a detection mechanism (4); The outer wall of the extension pipe (13) is hermetically and slidably sleeved with a positioning mechanism (5). Two support components (6) are fixedly connected to the upper surface of the support plate (1); Four support legs (14) are fixedly connected to the bottom end of the support plate (1). The outer walls of the four support legs (14) are jointly fixedly connected with a bottom plate (15). A coupling agent supply mechanism (7), a PLC controller (16) and an alarm (17) are fixedly connected to the upper surface of the bottom plate (15); A connecting bearing (18) is fixedly sleeved on the outer wall of one of the support legs (14). A bracket (19) is fixedly connected to the outer wall of the connecting bearing (18). A touch screen computer (20) is fixedly connected to the outer wall of the bracket (19); The detection mechanism (4) includes a plurality of elastic rubber rods (41) fixedly connected to the inner wall of the side end of the extension pipe (13). A corrugated pipe (42) is fixedly connected to the outer wall of the side end of the extension pipe (13). A CCD camera (43) is fixedly connected to the inner wall of the corrugated pipe (42). The outer wall of the CCD camera (43) is fixedly connected to the side ends of the plurality of elastic rubber rods (41). A fixing ring (44) is fixedly connected to the inner wall of the extension pipe (13). A second electric push rod (45) is fixedly connected to the inner wall of the fixing ring (44). A moving rod (46) is fixedly connected to the side end of the second electric push rod (45). Two moving through holes (47) matching the moving rod (46) are opened on the rod wall of the extension pipe (13). A pull rope (48) is fixedly connected to the rod wall of the moving rod (46). An extension block (49) is fixedly connected to the outer wall of the CCD camera (43). The outer wall of the extension block (49) is fixedly connected to the side end of the pull rope (48). An ultrasonic detection component (8) is fixedly connected to the side of the extension block (49) away from the pull rope (48); The ultrasonic detection component (8) includes a limiting cylinder (81) fixedly connected to the outer wall of the extension block (49). A T-shaped rod (82) is movably connected to the inner wall of the limiting cylinder (81). A positioning spring (83) is fixedly connected to the outer walls of the T-shaped rod (82) and the extension block (49). The outer end of the T-shaped rod (82) is fixedly connected to an ultrasonic detection probe (84). A fixing frame (85) is fixedly connected to the outer wall of the ultrasonic detection probe (84).

2. The hydrogen storage bottle liner defect detection device according to claim 1, characterized in that, Two symmetrically distributed LED supplementary light sources (21) are fixedly connected to the outer wall of the extension tube (13) on the side close to the CCD camera (43).

3. The hydrogen storage bottle inner liner defect detection device according to claim 1, characterized in that, A porous silica gel block (86) is fixedly connected to the inner wall of the fixing frame (85). The outer wall of the porous silica gel block (86) is in contact with the detection end of the ultrasonic probe. A delivery pipe (87) is fixedly communicated with the outer wall of the fixing frame (85). The feed end of the delivery pipe (87) passes through the side end of the extension tube (13) and extends outward. The data line of the ultrasonic detection probe (84) passes through the side end of the extension tube (13) and is electrically connected to an ultrasonic detector main body (88). The outer wall of the ultrasonic detector main body (88) is fixedly connected to the outer wall of the side end of the extension tube (13).

4. The hydrogen storage bottle inner liner defect detection device according to claim 3, characterized in that, The positioning mechanism (5) includes a hollow ring (51) that is hermetically and slidably sleeved on the outer wall of the extension tube (13). Two sealing bearings (52) are fixedly sleeved on the outer wall of the hollow ring (51). A connecting ring (53) is fixedly connected to the outer rings of the two sealing bearings (52). A transparent limiting cover (54) is fixedly sleeved on the outer wall of the connecting ring (53). A rubber expansion ring (55) is fixedly connected to the inner wall of the transparent limiting cover (54). Two conduits (56) are fixedly communicated with the outer wall of the rubber expansion ring (55). The intake ends of the two conduits (56) are fixedly communicated with the outer wall of the connecting ring (53). An air outlet hole (57) is formed in the outer wall of the hollow ring (51) located inside the connecting ring (53). An intake pipe (58) is fixedly communicated with the bottom end of the hollow ring (51). An outer helical tooth ring (59) that is vertically meshed with the helical gear (3) is fixedly sleeved on the outer wall of the transparent limiting cover (54).

5. The hydrogen storage bottle inner liner defect detection device according to claim 1, characterized in that, The support assembly (6) includes two arc-shaped plates (61) that are symmetrically and fixedly connected to the upper surface of the support plate (1). A plurality of universal balls (62) are fixedly connected to the inner wall of the arc-shaped plate (61).

6. The hydrogen storage bottle liner defect detection device according to claim 4, characterized in that, The coupling agent supply mechanism (7) includes a storage tank (71) fixedly connected to the upper surface of the bottom plate (15). The upper surface of the storage tank (71) is provided with a threaded addition hole, and a sealing plug (72) is threadedly connected to the hole wall of the threaded addition hole. The interior of the storage tank (71) is filled with a coupling agent layer (73). The bottom end of the delivery pipe (87) passes through the top end of the storage tank (71) and extends downward. The upper surface of the storage tank (71) is fixedly connected with a micro air pump (74). The air outlet end of the micro air pump (74) is fixedly communicated with a three-way reversing solenoid valve (75). The top air outlet of the three-way reversing solenoid valve (75) is fixedly communicated with the bottom end of the air inlet pipe (58). The side air outlet of the three-way reversing solenoid valve (75) is fixedly communicated with a branch pipe (76). The air outlet end of the branch pipe (76) is fixedly connected to the top end of the storage tank (71).

7. An inner liner defect detection device for a hydrogen storage cylinder according to claim 1, characterized in that, A circular through hole (9) is provided in the outer wall of the bellows (42), and a plurality of wire passing holes (22) are provided in the outer wall of the fixing ring (44).

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