A sealing property detection device for a refrigerator sealing strip

Abstract

This invention belongs to the field of refrigerator sealing strip manufacturing technology, specifically a sealing performance testing device for refrigerator sealing strips. It includes a testing platform, a testing box, a pressure plate, and a pressure sensor mounted on the inner wall of the testing box. The edge of the testing box opening has a slot for placing the sealing strip. An air pump is fixedly connected to one side of the outer wall of the testing box, and the air pump outlet is connected to an air inlet pipe, which communicates with the inner cavity of the testing box. The testing platform is equipped with a multi-point marking leak detection mechanism. This mechanism includes a testing box, a lifting platform, and a paper placement platform, with the testing box and paper placement platform fixedly connected to the upper surface of the lifting platform. This invention utilizes the multi-point marking leak detection mechanism to obtain four overlapping marking sheets placed in the placement box during the sealing performance testing process. The dotted marks on the four marking sheets correspond to the leakage conditions on the four sides of the sealing strip, providing personnel with a physical record that can be reviewed or traced.

Description

Technical Field

[0001] This invention belongs to the field of refrigerator sealing strip manufacturing technology, specifically a sealing performance testing device for refrigerator sealing strips. Background Technology

[0002] Refrigerator door seals are accessories used to seal the refrigerator door and body, primarily functioning to maintain a tight seal and prolong the freshness preservation effect. During production processes such as extrusion and corner cutting, seals are prone to accidental defects. These defects can affect their airtightness, therefore airtightness testing is necessary to prevent defective products from being manufactured.

[0003] In existing technology, when testing the sealing performance of a sealing strip, a fuzzy layer is placed around the outer wall of the testing chamber. The sealing strip body is then placed into the slot of the testing chamber and pressed down with a pressure plate. During testing, gas is introduced into the chamber's interior until a preset pressure is reached, at which point the gas supply is stopped and the chamber enters a pressure-holding state. The pressure gauge is then observed; if the sealing strip has good sealing performance, the pressure remains stable; if the sealing performance is poor, the pressure will continuously decrease. Simultaneously, by observing whether the fuzzy layer is moved by the leaking airflow, the specific location and number of gas leaks can be determined, allowing for analysis of the sealing strip's sealing performance and providing a basis for optimizing subsequent production processes.

[0004] However, when observing the floating fibers, the oscillation is a momentary physical phenomenon. Once the airflow stops, the disturbance disappears immediately. The testing process cannot generate any physical records for review or traceability, making it impossible to verify the testing conditions at the time. Furthermore, when there are multiple minor leaks in the sealing strip, personnel need to observe the complex movement of the entire circle of fibers simultaneously. The human eye cannot cover all points, easily leading to missed detections and affecting the reliability of the test results. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, the present invention proposes a sealing performance testing device for refrigerator sealing strips.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a sealing performance testing device for refrigerator sealing strips, including a testing platform, a testing box, a pressure plate, and a pressure sensor disposed on the inner wall of the testing box. The edge of the opening of the testing box is provided with a slot for placing the sealing strip. An air pump is fixedly connected to one side of the outer wall of the testing box. The air pump outlet is connected to an air inlet pipe, which is connected to the inner cavity of the testing box. A multi-point marking leakage detection mechanism is provided on the testing platform.

[0007] The multi-point marking leak detection mechanism includes a detection box, a lifting platform, and a paper feeding platform. The detection box and the paper feeding platform are fixedly connected to the upper surface of the lifting platform. The inner cavity of the detection box has multiple air inlets, and the bottom of each air inlet is connected to a connecting pipe. An air bladder is fixedly connected to the bottom of the connecting pipe. Multiple limiting cylinders are fixedly connected to the lower surface of the detection box. Each limiting cylinder corresponds to an air inlet, and each air bladder is located in the inner cavity of a limiting cylinder. A sliding rod is slidably inserted vertically through the bottom of the limiting cylinder. An installation block is fixedly connected to the lower end of the sliding rod. A marker pen is detachably installed on the lower surface of the installation block. Marking paper is placed on the upper surface of the paper feeding platform. The sealing strip is embedded in the slot. The pressure plate moves horizontally and squeezes the sealing strip. The detection box rises and fits against the edge of the detection box, pressure plate, and sealing strip. One side of the sealing strip is covered by the detection box. Gas is introduced into the inner cavity of the detection box. If gas leaks through the sealing strip, it will enter the corresponding air inlet. The air bladder inflates and squeezes the sliding rod. The tip of the marker pen contacts the marking paper.

[0008] Preferably, a support column 1 and a support column 2 are fixedly connected to both sides of the upper surface of the testing platform. One end of the testing box is rotatably connected to the support column 1. A motor 1 is fixedly connected to one side of the upper end of the support column 1. The output end of the motor 1 is fixedly connected to the rotating end of the testing box. A rotating plate is rotatably connected to one side of the upper end of the support column 2. Two guide rods 1 are slidably passed through one side of the rotating plate. One end of the two guide rods 1 is fixedly connected to one side of the pressure plate. A motor 2 is fixedly connected to one side of the upper end of the support column 2. The output end of the motor 2 is fixedly connected to the rotating end of the rotating plate. A cylinder 1 is fixedly connected to one side of the rotating plate. The piston end of the cylinder 1 is fixedly connected to one side of the pressure plate.

[0009] Preferably, a support platform is fixedly connected to one side of the upper surface of the testing platform, and guide rods 2 are slidably inserted vertically at the four corners of the support platform. The tops of multiple guide rods 2 are fixedly connected to the lower surface of the lifting platform. A cylinder 2 is fixedly connected to one side of the support platform, and the piston end of the cylinder 2 is fixedly connected to one side of the lower surface of the lifting platform.

[0010] Preferably, a compression block is fixedly connected to the upper end of the slide rod, the upper surface of the compression block is in contact with the bottom of the airbag, and a second spring is sleeved on the upper side of the slide rod. The upper end of the second spring is fixedly connected to the lower surface of the compression block, and the lower end is fixedly connected to the bottom of the inner wall of the limiting cylinder.

[0011] Preferably, the lifting platform is equipped with a paper unwinding and cutting assembly;

[0012] The unwinding and cutting assembly includes a winding roller for winding the marking paper, which is rotatably connected to a lifting platform. A limiting block for limiting the marking paper is fixedly connected to one side of the upper surface of the unwinding platform. A blade for cutting the marking paper is rotatably connected to one side of the upper surface of the lifting platform. A blade groove that cooperates with the blade is provided on the unwinding platform.

[0013] Preferably, a motor three is fixedly connected to one side of the upper surface of the lifting platform, and the output end of the motor three is fixedly connected to the rotating end of the winding roller. A motor six is ​​fixedly connected to one side of the upper surface of the lifting platform, and the output end of the motor six is ​​fixedly connected to one end of the blade.

[0014] Preferably, the lifting platform is equipped with a paper stacking and transferring assembly;

[0015] The stacking and transferring paper assembly includes a cylinder four, a support column three, and a placement box. The cylinder four and the support column three are respectively fixedly connected to the two sides of the upper surface of the lifting platform. The placement box is fixedly connected to the middle of the upper surface of the lifting platform. A rack is slidably connected to the upper end of the support column three. A slide rail plate is fixedly connected to one end of the rack and the piston end of the cylinder four. A cylinder six is ​​slidably connected to one side of the slide rail plate. A vacuum generator is fixedly connected to the piston end of the cylinder six. The suction port of the vacuum generator is connected to an adsorption tube. A suction cup is provided at the opening of the adsorption tube.

[0016] Preferably, a gear is rotatably connected to one side of the upper end of the support column three, and the gear meshes with the toothed blocks on the rack. A motor four is fixedly connected to one side of the upper end of the support column three, and the output end of the motor four is fixedly connected to the rotating end of the gear. A cylinder five is fixedly connected to one side of the slide rail plate, and the piston end of the cylinder five is fixedly connected to the sliding end of the cylinder six.

[0017] Preferably, the slide bar is equipped with a pen tip protection component;

[0018] The pen tip protection assembly includes a protective shell that is slidably fitted onto a slide rod along the vertical direction. Both sides of the bottom of the protective shell are laterally slidably fitted with blocks. Both sides of the mounting block are rotatably connected with connecting rods. The lower ends of the two connecting rods are rotatably connected to the ends of the two blocks respectively. A spring is fitted onto one side of the slide rod. The lower end of the spring is fixedly connected to the upper surface of the protective shell, and the upper end is fixedly connected to the surface of the slide rod.

[0019] Preferably, the placement box is equipped with a label paper sorting auxiliary component;

[0020] The marking paper sorting auxiliary component includes two bending plates and two fixing plates. The two bending plates are symmetrically rotated and connected to both ends inside the placement box. The two fixing plates are symmetrically fixed and connected to both sides of the upper surface of the lifting platform. A cylinder eight is slidably connected to one side of the fixing plate. A pressure roller is fixedly connected to the piston end of the cylinder eight. Both sides of the placement box are provided with strip-shaped through holes for the pressure rollers to pass through. A cylinder seven is fixedly connected to one side of the top of the fixing plate. The piston end of the cylinder seven is fixedly connected to the sliding end of the cylinder eight. Motor five is fixedly connected to both sides of the placement box. The output ends of the two motor five are respectively fixedly connected to the rotating ends of the two bending plates.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. The refrigerator sealing strip sealing performance testing device of the present invention utilizes a multi-point marking leak detection mechanism. During the sealing performance testing process, four overlapping marking papers are obtained in a placement box. The dotted marks on the four marking papers correspond to the leakage conditions on the four sides of the sealing strip, providing personnel with a physical record that can be reviewed or traced. Workers can further analyze the sealing performance and testing status of the sealing strip by observing the number and position of the marks on the marking papers. This avoids the situation where the human eye cannot easily cover all points when judging the leakage location by observing the movement of fibers, which can easily lead to missed detections, thus further ensuring the reliability of the test results.

[0023] 2. The refrigerator sealing strip sealing performance testing device of the present invention utilizes a pen tip protection component. When the marker pen is not in use, it is in a sealed space formed by the protective shell and the block, thereby avoiding the situation where the pen tip is exposed to the air for a long time, which can easily cause the ink on the pen tip to dry and harden, resulting in poor ink flow or no ink flow, thus affecting normal marking.

[0024] 3. The refrigerator sealing strip sealing performance testing device of the present invention utilizes a marking paper organizing auxiliary component. After four marking papers are stacked inside the placement box, a bending plate can be used to bend and press the two ends of the stacked marking papers together. This creates a snap-fit ​​at both ends of the four stacked marking papers, preventing relative slippage between adjacent papers. When the operator removes the set of marking papers from the placement box, the stability provided by the snap-fit ​​structure at both ends easily maintains the neatness of the entire set of papers, preventing unevenness caused by slippage. This provides a neat set of papers for subsequent binding or individual placement, facilitating the orderly collection of multiple sets of marking papers and effectively ensuring the smoothness of continuous testing of multiple sealing strips and the overall work cycle. Attached Figure Description

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure above the testing station;

[0028] Figure 3 This is a three-dimensional structural diagram showing the positional relationship between the testing box and the pressure plate;

[0029] Figure 4 yes Figure 3 Enlarged view of a portion of point A in the middle;

[0030] Figure 5 This is a schematic diagram of the three-dimensional structure at the support platform;

[0031] Figure 6This is a three-dimensional structural diagram showing the positional relationship between the detection box and the paper feeding platform;

[0032] Figure 7 This is a schematic diagram of the three-dimensional structure at the rotating plate.

[0033] Figure 8 This is a schematic diagram of the three-dimensional structure of the detection box;

[0034] Figure 9 This is a schematic diagram of the three-dimensional structure at the limiting cylinder;

[0035] Figure 10 yes Figure 9 Enlarged view of a section at point B in the middle;

[0036] Figure 11 This is a three-dimensional structural diagram of the lifting platform;

[0037] Figure 12 This is a schematic diagram of the three-dimensional structure of the cylinder.

[0038] Figure 13 This is a schematic diagram of the three-dimensional structure of the support pillar;

[0039] Figure 14 This is a schematic diagram of a partial three-dimensional structure of the lifting platform;

[0040] Figure 15 yes Figure 14 Enlarged view of a section at point C;

[0041] Figure 16 This is a schematic diagram of the three-dimensional structure at the fixed plate.

[0042] Figure 17 yes Figure 16 Enlarged view of a section at point D.

[0043] In the diagram: 1. Testing table; 2. Testing box; 3. Motor 1; 4. Support column 1; 5. Support column 2; 6. Motor 2; 7. Pressure plate; 8. Rotating plate; 9. Support platform; 10. Air inlet pipe; 11. Air pump; 12. Lifting platform; 13. Guide rod 1; 14. Cylinder 1; 15. Air pressure sensor; 16. Slot; 17. Testing box; 18. Cylinder 2; 19. Guide rod 2; 20. Rack; 21. Support column 3; 22. Limiting cylinder; 23. Air inlet; 24. Paper feeding platform; 25. Protective shell; 26. Connecting pipe; 27. Limiting block; 28. Sliding rod; 29. 30. Marker; 31. Mounting block; 32. Connecting rod; 33. Stop block; 34. Spring 1; 35. Spring 2; 36. Extrusion block; 37. Cylinder 4; 38. Slide rail plate; 39. Motor 3; 40. Marking paper; 41. Cylinder 5; 42. Cylinder 6; 43. Vacuum generator; 44. Suction cup; 45. Adsorption tube; 46. Motor 4; 47. Gear; 48. Fixing plate; 49. Cylinder 8; 50. Placement box; 51. Motor 5; 52. Bending plate; 53. Pressure roller; 54. Winding roller; 55. Motor 6; 56. Blade; 57. Airbag. Detailed Implementation

[0044] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Example 1:

[0046] Please refer to Figures 1-17 The present invention provides a technical solution: a sealing performance testing device for refrigerator sealing strips, including a testing platform 1, a testing box 2, a pressure plate 7, and a pressure sensor 15 disposed on the inner wall of the testing box 2. The edge of the opening of the testing box 2 is provided with a slot 16 for placing the sealing strip. An air pump 11 is fixedly connected to one side of the outer wall of the testing box 2. The air outlet of the air pump 11 is connected to an air inlet pipe 10, which is connected to the inner cavity of the testing box 2. A multi-point marking leakage detection mechanism is provided on the testing platform 1.

[0047] The multi-point marking leak detection mechanism includes a detection box 17, a lifting platform 12, and a paper feeding platform 24. The detection box 17 and the paper feeding platform 24 are both fixedly connected to the upper surface of the lifting platform 12. The inner cavity of the detection box 17 has multiple air inlets 23, and the bottom of each air inlet 23 is connected to a connecting pipe 26. An airbag 57 is fixedly connected to the bottom opening of the connecting pipe 26. Multiple limiting cylinders 22 are fixedly connected to the lower surface of the detection box 17. Each limiting cylinder 22 corresponds to one of the air inlets 23, and each airbag 57 is located within the inner cavity of one limiting cylinder 22. The bottom of the limiting cylinder 22 slides vertically through it. There is a slide bar 28, and a mounting block 30 is fixedly connected to the lower end of the slide bar 28. A marker pen 29 is detachably provided on the lower surface of the mounting block 30. A marking paper 39 is placed on the upper surface of the paper table 24. The sealing strip is embedded in the slot 16. The pressure plate 7 moves horizontally and squeezes the sealing strip. The detection box 17 rises and fits against the edge of the detection box 2, the pressure plate 7, and the sealing strip. One side of the sealing strip is covered by the detection box 17. Gas is introduced into the inner cavity of the detection box 2. If the gas leaks through the sealing strip, it will enter the corresponding air inlet 23. The air bag 57 is inflated and squeezes the slide bar 28. The tip of the marker pen 29 contacts the marking paper 39.

[0048] like Figures 1-3 , Figure 7 As shown, support column 1 4 and support column 2 5 are fixedly connected to both sides of the upper surface of the testing platform 1. One end of the testing box 2 is rotatably connected to support column 1 4. Motor 1 3 is fixedly connected to one side of the upper end of support column 1 4. The output end of motor 1 3 is fixedly connected to the rotating end of the testing box 2. Rotating plate 8 is rotatably connected to one side of the upper end of support column 2 5. Two guide rods 13 slide horizontally through one side of rotating plate 8. One end of the two guide rods 13 is fixedly connected to one side of the pressure plate 7. Motor 2 6 is fixedly connected to one side of the upper end of support column 2 5. The output end of motor 2 6 is fixedly connected to the rotating end of rotating plate 8. Cylinder 1 14 is fixedly connected to one side of rotating plate 8. The piston end of cylinder 1 14 is fixedly connected to one side of the pressure plate 7.

[0049] like Figure 5 As shown, a support platform 9 is fixedly connected to one side of the upper surface of the testing platform 1. Guide rods 19 are slidably inserted vertically at the four corners of the support platform 9. The tops of the multiple guide rods 19 are fixedly connected to the lower surface of the lifting platform 12. A cylinder 18 is fixedly connected to one side of the support platform 9. The piston end of the cylinder 18 is fixedly connected to one side of the lower surface of the lifting platform 12.

[0050] like Figure 9 As shown, a compression block 35 is fixedly connected to the upper end of the slide rod 28. The upper surface of the compression block 35 is in contact with the bottom of the airbag 57. A second spring 34 is sleeved on the upper side of the slide rod 28. The upper end of the second spring 34 is fixedly connected to the lower surface of the compression block 35, and the lower end is fixedly connected to the bottom of the inner wall of the limiting cylinder 22.

[0051] like Figure 14 and Figure 15As shown, the lifting platform 12 is equipped with a paper unwinding and cutting assembly;

[0052] The unwinding and cutting assembly includes a winding roller 54 for winding the marking paper 39, which is rotatably connected to the lifting platform 12. A limiting block 27 for limiting the marking paper 39 is fixedly connected to one side of the upper surface of the paper feeding platform 24. A blade 56 for cutting the marking paper 39 is rotatably connected to one side of the upper surface of the lifting platform 12. The paper feeding platform 24 is provided with a cutting groove that cooperates with the blade 56.

[0053] like Figure 14 and Figure 15 As shown, a motor 38 is fixedly connected to one side of the upper surface of the lifting platform 12. The output end of the motor 38 is fixedly connected to the rotating end of the winding roller 54. A motor 6 55 is fixedly connected to one side of the upper surface of the lifting platform 12. The output end of the motor 6 55 is fixedly connected to one end of the blade 56.

[0054] like Figures 11-13 As shown, the lifting platform 12 is equipped with a stacking and transferring paper assembly;

[0055] The stacking and transferring paper assembly includes cylinder 36, support column 21, and placement box 50. Cylinder 36 and support column 21 are fixedly connected to both sides of the upper surface of the lifting platform 12, and placement box 50 is fixedly connected to the middle of the upper surface of the lifting platform 12. A rack 20 is slidably connected to the upper end of support column 21. A slide rail 37 is fixedly connected to one end of rack 20 and the piston end of cylinder 36. Cylinder 41 is slidably connected to one side of slide rail 37. A vacuum generator 42 is fixedly connected to the piston end of cylinder 41. The suction port of vacuum generator 42 is connected to an adsorption tube 44. A suction cup 43 is provided at the opening of adsorption tube 44.

[0056] like Figure 13 As shown, a gear 46 is rotatably connected to one side of the upper end of the support column 3 21. The gear 46 meshes with the toothed blocks on the rack 20. A motor 45 is fixedly connected to one side of the upper end of the support column 3 21. The output end of the motor 45 is fixedly connected to the rotating end of the gear 46. A cylinder 40 is fixedly connected to one side of the slide rail plate 37. The piston end of the cylinder 40 is fixedly connected to the sliding end of the cylinder 41.

[0057] Specifically, in existing technology, when testing the sealing strip's sealing performance, a felt-like material is placed around the outer wall of the testing chamber 2. The sealing strip body is then placed into the slot 16 of the testing chamber 2 and pressed down with the pressure plate 7. During testing, gas is introduced into the inner cavity of the testing chamber 2. Once the preset pressure is reached, the gas supply is stopped, and the chamber enters a pressure-holding state. The pressure gauge is then observed. If the sealing strip has good sealing performance, the pressure remains stable; if the sealing performance is poor, the pressure will continuously decrease. Simultaneously, by observing whether the felt-like material is blown away by the leaking airflow, the specific location and number of gas leaks can be determined, allowing for analysis of the sealing strip's sealing performance and providing a basis for optimizing subsequent production processes.

[0058] However, when observing the floating fibers, the oscillation is a momentary physical phenomenon. Once the airflow stops, the disturbance disappears immediately. The testing process cannot generate any physical records for review or traceability, making it impossible to verify the testing conditions at the time. Furthermore, when there are multiple minor leaks in the sealing strip, personnel need to observe the complex movement of the entire circle of fibers simultaneously. The human eye cannot cover all points, easily leading to missed detections and affecting the reliability of the test results.

[0059] Therefore, in order to solve the above problems, the working principle of this embodiment is as follows:

[0060] First, the sealing strip to be tested is embedded in the slot 16, and then the cylinder 14 is used to drive the pressure plate 7 to move laterally and press the sealing strip tightly.

[0061] Then, gas is introduced into the detection chamber 2 through the air pump 11 and the air inlet pipe 10. At the same time, the air pressure sensor 15 continuously monitors the air pressure value inside the detection chamber 2 and displays the air pressure value on the external display screen. The gas supply is stopped after the air pressure reaches a certain value. The air pressure value is then observed. If the air pressure value remains stable, it indicates that the sealing strip has good sealing performance; conversely, if the air pressure value continues to decrease, it indicates that gas is leaking through the sealing strip, and the sealing strip has poor sealing performance.

[0062] At this time, cylinder 18 drives the lifting platform 12 to rise, causing the detection box 17 to fit against the detection chamber 2, pressure plate 7, and lower edge of the sealing strip, with the lower edge of the sealing strip covered by the detection box 17, and this state is maintained. If gas leaks out through a point on the part of the sealing strip covered by the detection box 17, the gas will enter the corresponding air inlet 23, and then enter the air bladder 57 through the air inlet 23 and connecting pipe 26. After the air bladder 57 inflates, it squeezes the sliding rod 28, causing the sliding rod 28 to move downwards. The spring 34 is compressed, and the tip of the marker pen 29 contacts the marking paper 39, leaving a dotted mark on the marking paper 39. During this process, gas can be continuously introduced into the detection chamber 2 to ensure that there is enough gas to fill the air bladder 57. As gas continues to be introduced, when the marker pen 29 stops moving, the lifting platform 12 is driven to descend, the detection box 17 moves away from the sealing strip, and the marker pen 29 resets under the action of the spring 34.

[0063] Since the suction cups 43 on both sides are aligned with the two ends of the label paper 39 laid flat on the paper placement table 24, the two suction cups 43 can be driven to descend and adhere to the label paper 39 simultaneously by the cylinders 41 on both sides. Then, the vacuum generator 42 is activated, and the suction cups 43 are used to adhere and fix the two ends of the label paper 39 by negative pressure adsorption. Subsequently, the motor 55 drives the blade 56 to rotate, and the label paper 39 is cut with the cooperation of the blade 56 and the cutting groove. Then, the cylinder 40 drives the cylinder 41 to move laterally, so that the cut label paper 39 is moved laterally to the top of the placement box 50, and then the label paper 39 is driven to descend and placed in the placement box 50. Then, the suction cups 43 release the label paper 39.

[0064] Next, the two suction cups 43 return to their original positions above the paper feeding platform 24. At this point, the cylinder 36 drives one suction cup 43 to move laterally above the broken end of the label paper 39. This suction cup 43 then again adheres to the broken end of the label paper 39, and pulls the end of the label paper 39 towards the other suction cup 43. Simultaneously, the motor 38 drives the winding roller 54 to rotate, unwinding the label paper 39. Once the label paper 39 has been unwound to a suitable length, the suction cup 43 pulling the label paper 39 can release the end of the label paper 39 and return to its original position. Subsequently, the motor 45 drives the gear 46 to rotate, causing the rack 20 to move laterally, allowing the other suction cup 43 to align with and adhere to the broken end of the label paper 39. The broken end of the label paper 39 is then pulled to the end of the paper feeding platform 24. This completes the replacement of the label paper 39.

[0065] Subsequently, motors 3 and 6 are started simultaneously, causing the detection box 2 and pressure plate 7 to rotate 90 degrees, so that the other side of the sealing strip faces downwards. Then, the detection box 17 is driven to adhere to that side of the sealing strip. The above operation is repeated until all four sides of the sealing strip are adhered to the detection box 17, completing the detection work. This yields four overlapping marking papers 39 placed in the placement box 50. The dotted marks on the four marking papers 39 correspond to the leakage conditions on the four sides of the sealing strip, providing personnel with a physical record that can be reviewed or traced. By observing the number and position of the marks on the marking papers 39, staff can further analyze the sealing performance and detection status of the sealing strip, avoiding the situation where the human eye cannot cover all points when judging the leakage point by observing the movement of the fibers, which is prone to missed detection, thus further ensuring the reliability of the detection results.

[0066] Example 2:

[0067] In the above embodiment, although the pen tip of the marker 29 can be brought into contact with the marking paper 39 by pushing the squeezing block 35 through the airbag 57, if the pen tip of the marker 29 is exposed to the air for a long time, the ink in the pen tip is prone to drying and solidifying, resulting in poor ink flow or no ink flow, which affects the formation of effective dot marks on the marking paper 39 and thus affects normal recording.

[0068] Therefore, in order to solve the above problems, the working principle of this embodiment is as follows:

[0069] like Figure 10 As shown, a pen tip protection component is provided on the slider 28;

[0070] The pen tip protection assembly includes a protective shell 25 that is vertically slidably fitted onto a slide rod 28. Both sides of the bottom of the protective shell 25 are laterally slidably fitted with blocks 32. Both sides of the mounting block 30 are rotatably connected with connecting rods 31. The lower ends of the two connecting rods 31 are rotatably connected to the ends of the two blocks 32 respectively. A spring 33 is fitted on one side of the slide rod 28. The lower end of the spring 33 is fixedly connected to the upper surface of the protective shell 25, and the upper end is fixedly connected to the surface of the slide rod 28.

[0071] Specifically, in the initial state, the marker 29 is located inside the protective shell 25, and the two blocks 32 close the bottom opening of the protective shell 25.

[0072] When the slider 28 moves downward due to the pressure of the airbag 57, the bottom of the protective shell 25 will first contact the marking paper 39, and the protective shell 25 will stop descending due to being blocked. The slider 28 continues to slide downward, and the mounting block 30 drives the two connecting rods 31 to rotate. The connecting rods 31 push the stop block 32 to slide laterally, opening the bottom of the protective shell 25, allowing the pen tip to contact the marking paper 39. When the slider 28 returns to its original position, the two stop blocks 32 will also return to their original position under the action of the spring 33, and re-close the opening of the protective shell 25. Thus, when the marker pen 29 is not in use, it is in a sealed space formed by the protective shell 25 and the stop block 32, thereby avoiding the situation where the pen tip of the marker pen 29 is exposed to the air for a long time, which can easily cause the ink on the pen tip to dry and harden, resulting in poor ink flow or no ink flow, affecting normal marking.

[0073] Example 3:

[0074] In the above embodiment, although the four marking papers 39 corresponding to the leakage on the four sides of the sealing strip can be stacked in the placement box 50, when there are a large number of sealing strips to be measured, in order to avoid confusion and facilitate subsequent unified analysis, each set of marking papers 39 needs to be placed separately or bound using tools such as a stapler.

[0075] When the staff removes a stack of label sheets 39 from the placement box 50, because the label sheets 39 are made of flexible material and have a certain length, it is difficult for the staff to manually control the stacking state of the label sheets 39. This can easily cause adjacent label sheets 39 to slide and shift, resulting in the four label sheets 39 that were originally aligned and stacked becoming uneven after being removed. This not only makes them easy to scatter, but also makes it difficult to place and bind them individually later, thus affecting the efficiency of continuous collection of multiple sets of label sheets 39, and also affecting the efficiency of continuous detection of multiple sealing strips.

[0076] Therefore, in order to solve the above problems, the working principle of this embodiment is as follows:

[0077] like Figure 14 , Figure 16 , Figure 17 As shown, the placement box 50 is equipped with a label paper sorting auxiliary component;

[0078] The marking paper sorting auxiliary component includes two bending plates 52 and two fixing plates 47. The two bending plates 52 are symmetrically rotated and connected to both ends inside the placement box 50. The two fixing plates 47 are symmetrically fixed and connected to both sides of the upper surface of the lifting platform 12. A cylinder 8 49 is slidably connected to one side of the fixing plate 47. A pressure roller 53 is fixedly connected to the piston end of the cylinder 8 49. Both sides of the placement box 50 are provided with strip-shaped through holes for the pressure rollers 53 to pass through. A cylinder 7 48 is fixedly connected to one side of the top of the fixing plate 47. The piston end of the cylinder 7 48 is fixedly connected to the sliding end of the cylinder 8 49. Motors 51 are fixedly connected to both sides of the placement box 50. The output ends of the two motors 51 are respectively fixedly connected to the rotating ends of the two bending plates 52.

[0079] Specifically, after the four marking papers 39 are stacked inside the placement box 50, the cylinders 49 on both sides simultaneously drive the pressure rollers 53 on both sides to move laterally and pass through the strip-shaped through holes on both sides of the placement box 50. Then, the cylinder 48 drives the pressure rollers 53 to descend and press down the marking papers 39.

[0080] Subsequently, the motors 51 on both sides drive the bending plates 52 on both sides to rotate. Since the two ends of the marking paper 39 are pressed, the bending plates 52 can be used to bend the two ends of the four stacked marking papers 39. Then, the pressure roller 53 is driven to move out of the placement box 50 until the bending plate 52 rotates 180 degrees to bend and press the marking paper 39 tightly.

[0081] At this point, the four stacked label sheets 39 are interlocked at both ends, preventing relative slippage between adjacent sheets. When workers retrieve this set of label sheets 39 from the placement box 50, the stability provided by the interlocking structure at both ends easily maintains the neatness of the entire set of sheets, preventing unevenness caused by slippage. This provides a well-organized set of sheets for subsequent binding or individual placement, facilitating the orderly collection of multiple sets of label sheets 39 and effectively ensuring the smoothness of continuous testing of multiple sealing strips and the overall work cycle.

[0082] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing performance testing device for refrigerator sealing strips, comprising a testing platform (1), a testing box (2), a pressure plate (7), and a pressure sensor (15) disposed on the inner wall of the testing box (2), wherein the edge of the opening of the testing box (2) is provided with a slot (16) for placing the sealing strip, and an air pump (11) is fixedly connected to one side of the outer wall of the testing box (2), the air outlet of the air pump (11) is connected to an air inlet pipe (10), and the air inlet pipe (10) is connected to the inner cavity of the testing box (2), characterized in that: The detection station (1) is equipped with a multi-point marking leak detection mechanism; The multi-point marking leak detection mechanism includes a detection box (17), a lifting platform (12), and a paper feeding platform (24). The detection box (17) and the paper feeding platform (24) are both fixedly connected to the upper surface of the lifting platform (12). The inner cavity of the detection box (17) is provided with multiple air inlets (23). The bottom of each air inlet (23) is connected to a connecting pipe (26). An airbag (57) is fixedly connected and connected to the bottom of the connecting pipe (26). Multiple limiting cylinders (22) are fixedly connected to the lower surface of the detection box (17). Each limiting cylinder (22) corresponds to the position of an air inlet (23), and each airbag (57) is located in the inner cavity of a limiting cylinder (22). The bottom of the limiting cylinder (22) slides vertically through... A sliding rod (28) is provided, and an installation block (30) is fixedly connected to the lower end of the sliding rod (28). A marker pen (29) is detachably provided on the lower surface of the installation block (30). A marking paper (39) is placed on the upper surface of the paper table (24). The sealing strip is embedded in the slot (16). The pressure plate (7) moves horizontally and squeezes the sealing strip. The detection box (17) rises and fits against the edge of the detection box (2), the pressure plate (7), and the sealing strip. One side of the sealing strip is covered by the detection box (17). Gas is introduced into the inner cavity of the detection box (2). If the gas leaks through the sealing strip, it will enter the corresponding air inlet (23). The air bag (57) is inflated and squeezes the sliding rod (28). The pen tip of the marker pen (29) contacts the marking paper (39).

2. The sealing performance testing device for refrigerator sealing strips according to claim 1, characterized in that: The upper surface of the testing platform (1) is fixedly connected to two sides of the support column 1 (4) and the support column 2 (5). One end of the testing box (2) is rotatably connected to the support column 1 (4). The upper end of the support column 1 (4) is fixedly connected to the motor 1 (3). The output end of the motor 1 (3) is fixedly connected to the rotating end of the testing box (2). The upper end of the support column 2 (5) is rotatably connected to the rotating plate (8). Two guide rods 1 (13) are slidably passed through one side of the rotating plate (8). One end of the two guide rods 1 (13) is fixedly connected to one side of the pressure plate (7). The upper end of the support column 2 (5) is fixedly connected to the motor 2 (6). The output end of the motor 2 (6) is fixedly connected to the rotating end of the rotating plate (8). The rotating plate (8) is fixedly connected to one side of the cylinder 1 (14). The piston end of the cylinder 1 (14) is fixedly connected to one side of the pressure plate (7).

3. The sealing performance testing device for refrigerator sealing strips according to claim 1, characterized in that: A support platform (9) is fixedly connected to one side of the upper surface of the testing platform (1). Guide rods (19) are slidably inserted vertically at the four corners of the support platform (9). The tops of multiple guide rods (19) are fixedly connected to the lower surface of the lifting platform (12). A cylinder (18) is fixedly connected to one side of the support platform (9). The piston end of the cylinder (18) is fixedly connected to one side of the lower surface of the lifting platform (12).

4. The sealing performance testing device for refrigerator sealing strips according to claim 1, characterized in that: The upper end of the slide rod (28) is fixedly connected to the compression block (35), the upper surface of the compression block (35) is in contact with the bottom of the airbag (57), and the upper side of the slide rod (28) is fitted with a second spring (34). The upper end of the second spring (34) is fixedly connected to the lower surface of the compression block (35), and the lower end is fixedly connected to the bottom of the inner wall of the limiting cylinder (22).

5. A sealing performance testing device for refrigerator sealing strips according to claim 1, characterized in that: The lifting platform (12) is equipped with a paper unwinding and cutting assembly; The unwinding and cutting assembly includes a winding roller (54) for winding the marking paper (39), the winding roller (54) being rotatably connected to the lifting platform (12), a limiting block (27) for limiting the marking paper (39) being fixedly connected to one side of the upper surface of the paper feeding platform (24), a blade (56) for cutting the marking paper (39) being rotatably connected to one side of the upper surface of the lifting platform (12), and a blade groove that cooperates with the blade (56) on the paper feeding platform (24).

6. The sealing performance testing device for refrigerator sealing strips according to claim 5, characterized in that: A motor three (38) is fixedly connected to one side of the upper surface of the lifting platform (12). The output end of the motor three (38) is fixedly connected to the rotating end of the winding roller (54). A motor six (55) is fixedly connected to one side of the upper surface of the lifting platform (12). The output end of the motor six (55) is fixedly connected to one end of the blade (56).

7. A sealing performance testing device for refrigerator sealing strips according to claim 5, characterized in that: The lifting platform (12) is equipped with a paper stacking and transferring assembly; The stacking and transferring paper assembly includes cylinder four (36), support three (21), and placement box (50). Cylinder four (36) and support three (21) are fixedly connected to both sides of the upper surface of the lifting platform (12). Placement box (50) is fixedly connected to the middle of the upper surface of the lifting platform (12). A rack (20) is slidably connected to the upper end of support three (21) along the horizontal direction. A slide rail plate (37) is fixedly connected to one end of the rack (20) and the piston end of cylinder four (36). Cylinder six (41) is slidably connected to one side of the slide rail plate (37) along the horizontal direction. A vacuum generator (42) is fixedly connected to the piston end of cylinder six (41). The suction port of the vacuum generator (42) is connected to an adsorption tube (44). A suction cup (43) is provided at the opening of the adsorption tube (44).

8. A sealing performance testing device for refrigerator sealing strips according to claim 7, characterized in that: A gear (46) is rotatably connected to one side of the upper end of the support column (21). The gear (46) meshes with the toothed blocks on the rack (20). A motor (45) is fixedly connected to one side of the upper end of the support column (21). The output end of the motor (45) is fixedly connected to the rotating end of the gear (46). A cylinder (40) is fixedly connected to one side of the slide rail plate (37). The piston end of the cylinder (40) is fixedly connected to the sliding end of the cylinder (41).

9. A sealing performance testing device for refrigerator sealing strips according to claim 1, characterized in that: The slide bar (28) is equipped with a pen tip protection component; The pen tip protection assembly includes a protective shell (25) that is slidably mounted on a slide rod (28) in a vertical direction. Both sides of the bottom of the protective shell (25) are slidably provided with blocks (32). Both sides of the mounting block (30) are rotatably connected with connecting rods (31). The lower ends of the two connecting rods (31) are rotatably connected to the ends of the two blocks (32) respectively. A spring (33) is mounted on one side of the slide rod (28). The lower end of the spring (33) is fixedly connected to the upper surface of the protective shell (25), and the upper end is fixedly connected to the surface of the slide rod (28).

10. A sealing performance testing device for refrigerator sealing strips according to claim 7, characterized in that: The placement box (50) is equipped with a marking paper sorting auxiliary component; The marking paper sorting auxiliary component includes two bending plates (52) and two fixing plates (47). The two bending plates (52) are symmetrically rotated and connected to both ends inside the placement box (50). The two fixing plates (47) are symmetrically fixed and connected to both sides of the upper surface of the lifting platform (12). A cylinder eight (49) is slidably connected to one side of the fixing plate (47). A pressure roller (53) is fixedly connected to the piston end of the cylinder eight (49). Both sides of the placement box (50) are provided with strip-shaped through holes for the pressure rollers (53) to pass through. A cylinder seven (48) is fixedly connected to one side of the top of the fixing plate (47). The piston end of the cylinder seven (48) is fixedly connected to the sliding end of the cylinder eight (49). Both sides of the placement box (50) are fixedly connected to motor five (51). The output ends of the two motor five (51) are fixedly connected to the rotating ends of the two bending plates (52) respectively.

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