A non-destructive detection method and device for soft package leakage

Abstract

The invention relates to the field of packaging detection, and in particular to a method and device for non-destructive detection of soft package leakage, comprising a detection box, wherein a symmetrically distributed guide rail is arranged on the bottom wall of the detection box, a drawer is slidably arranged between the drawer groove and the guide rail, a handle is arranged in front of the drawer, a support plate is also arranged on the inner wall of the detection box, a push cylinder is arranged on the support plate through a cylinder seat, a detection unit is arranged on the telescopic wall of the push cylinder, a placement unit is arranged in the drawer, and the sealing performance of a packaging bag can be detected by the detection unit, a vacuum device extracts the air inside the drawer to put the packaging bag in a vacuum state, a push cylinder pushes a pressing plate into the placing groove to press the packaging bag, a displacement sensor monitors the movement of a circular shaft in real time, and judges the sealing performance of the packaging bag according to the expansion or flattening of the packaging bag.

Description

Technical Field

[0001] The present invention relates to the field of packaging detection, and particularly to a method and device for non-destructively detecting soft packaging leakage. Background Art

[0002] Packaging detection refers to the inspection of the integrity, sealing performance, and presence of defects of packaging materials through a series of methods and means to ensure that products are not contaminated or damaged by the external environment during transportation and storage, thereby guaranteeing the quality and safety of products.

[0003] One of the main detection methods in the current industry is to place the specimen in water, then perform a vacuum pumping treatment on the container filled with water, and observe whether there are bubbles on the surface of the specimen to determine whether there is leakage or defects. However, this method has obvious disadvantages: First, the operation process is cumbersome and complex, requiring manual immersion of the specimen in water and then performing vacuum pumping on the container again. Second, the detection efficiency is low because it is necessary to observe the bubble conditions of each specimen one by one, making it difficult to achieve large-scale and rapid automated detection. In addition, this method also relies on the experience judgment of operators, which is prone to misjudgment and affects the accuracy of the detection results.

[0004] In the prior art, a patent with the publication number CN112033622A discloses a packaging device for automatically detecting the sealing performance of packaging, including a support frame. The support frame includes two fixed blocks, and sliding rods are fixedly connected between the two ends of the two fixed blocks. Support legs are fixedly connected to the bottom surfaces of the two ends of the two fixed blocks. Among them, a connecting rod is fixedly connected between the middle parts of the two support legs; by pushing the U-shaped handle to the left, the limiting plate drives the air blowing pipe to move between the two L-shaped clamping plates, and the two sliding blocks slide relative to the sliding rods. The pressure sensors on the inner side walls and inner top walls of the two L-shaped clamping plates are in contact with the outer side of the packaging bag filled with gas. If the readings of the pressure sensors are stable, the sealing performance of the packaging bag is good, thus avoiding the pollution and damage of the packaging bag caused by water wetting the packaging bag when detecting the packaging sealing performance with water. However, although this technology has improved some of the original problems, there are still aspects that need further optimization to better meet the actual detection needs.

[0005] 1. The above prior art mainly relies on pressure sensors and air blowing pipes for detecting the sealing performance of packaging bags. Therefore, the detection method is single. It mainly judges the sealing performance by detecting the pressure change inside the packaging bag through pressure sensors. This method may not be able to effectively detect tiny leakage points. Especially for some packaging bags with thicker materials or complex structures, the sensitivity of pressure sensors may be insufficient; and it lacks the ability to detect from multiple angles, resulting in the detection results may not be comprehensive and accurate enough.

[0006] 2. The above-mentioned prior art requires the packaging bag to be fixed on the blowing pipe and the limit plate to be manually moved for inspection. The operation steps are cumbersome, which increases the operation difficulty and inspection time. It is impossible to perform inspection under different temperature conditions and cannot evaluate the sealing performance of the packaging bag under different temperature environments. This may cause problems in practical applications and the applicability is not high. Moreover, the above-mentioned prior art requires manual participation in the operation, especially in the loading and unloading process. The operation process is relatively cumbersome and the efficiency of continuous inspection is low.

[0007] Therefore, based on the above-stated viewpoint, there is still room for optimization in the existing technology for testing the sealing performance of packaging bags. Summary of the invention

[0008] In order to solve the above problems, the present invention provides a non-destructive detection device for soft package leakage, including a detection box, a bottom wall of the detection box is provided with symmetrically distributed guide rails, one side of the detection box is provided with a pull-out groove corresponding to the guide rail, and a drawer is slidingly arranged between the pull-out groove and the guide rail, a handle is arranged in front of the drawer, and a support plate is also arranged on the inner wall of the detection box, and a pushing cylinder is arranged on the support plate through a cylinder seat.

[0009] The telescopic end of the push cylinder is provided with a detection unit corresponding to the drawer.

[0010] A placement unit for placing packaging bags is arranged in the drawer.

[0011] The detection unit comprises a push frame plate arranged at the lower end of the telescopic end of the push cylinder, the support plate and the push frame plate are symmetrically provided with structural grooves, and a vacuum device is installed in the structural groove on the push frame plate.

[0012] Preferably, the telescopic end of the pushing cylinder is slidably connected to the pushing frame plate, a limit cavity is opened in the pushing frame plate, a limit plate located in the limit cavity is fixedly arranged on the outer side of the telescopic end of the pushing cylinder, and a reset push spring is arranged between the limit plate and the inner top wall of the limit frame plate.

[0013] Preferably, a plurality of rectangular grooves distributed in a rectangular shape are provided on the lower side of the push frame plate, and a push plate located inside the push frame plate is further provided at the telescopic end of the push cylinder, and a plurality of circular grooves corresponding to the rectangular grooves are provided on the push plate.

[0014] Preferably, the push plate is also provided with a plurality of ventilation grooves distributed in a rectangular shape.

[0015] Preferably, limit frame plates are symmetrically arranged on both sides of the circular groove, a circular shaft is slidably arranged in the circular groove, an extension plate located in the corresponding limit frame plate is arranged on the outside of the circular shaft, and a pushing member for pressing the packaging bag is arranged on the side of the circular shaft close to the rectangular groove.

[0016] Preferably, a push spring is provided between the extension plate and the inner top wall of the limiting frame plate.

[0017] Preferably, the placement unit includes a plurality of rectangular blocks arranged inside the drawer and corresponding to the rectangular grooves one by one, the rectangular blocks are provided with placement grooves, a placement plate is slidably arranged in the placement grooves, and a thrust spring is arranged between the placement plate and the bottom wall of the placement grooves.

[0018] Preferably, the pushing member includes a pressing plate arranged on a side of the circular shaft away from the circular groove, and the pressing plate corresponds to the placement groove one by one.

[0019] Preferably, a plurality of displacement sensors corresponding one-to-one to the circular shafts are also arranged on the inner top wall of the push frame plate.

[0020] In addition, the present invention also provides a method for non-destructive detection of soft package leakage, comprising the following steps:

[0021] S1, packaging bag placement: pull the drawer out of the inspection box by the handle, then place the packaging bag in the placement unit, and finally push the drawer back into the inspection box from the pull-out slot.

[0022] S2, vacuum detection: the push cylinder drives the push frame plate to contact the upper end surface of the drawer, and then the environment in the drawer is evacuated to a vacuum state through the vacuum device, and the detection unit detects the pressure change of the packaging bag.

[0023] S3, compression test: The testing unit applies pressure to the upper end of the packaging bag to test the sealing performance of the packaging bag under different compression forces.

[0024] S4, packaging bag removal: After the inspection is completed, the push cylinder indirectly drives the push plate to move to the initial position, the drawer is removed from the pull-out slot, and finally the packaging bag is removed from the placement unit.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The present invention can detect the sealing performance of the packaging bag through the detection unit. When the pushing cylinder drives the detection unit to contact the drawer, the vacuum device extracts the air inside the drawer to put the packaging bag in a vacuum state. Then, the pushing cylinder continues to push the pressing plate into the placement groove to press the packaging bag. During this process, the displacement sensor monitors the movement of the circular shaft in real time and judges its sealing performance according to the expansion or flattening of the packaging bag. Therefore, the present invention can not only accurately detect the sealing performance of the packaging bag, but also test its sealing ability under different pressing forces.

[0027] 2. The present invention pushes the push plate through the reset push spring, driving the detection unit to move toward the drawer. When the detection unit contacts the drawer, the push cylinder continues to push the pressing plate to press the packaging bag. At the same time, the limit assembly can limit the placement plate to ensure the stability of the detection process. In addition, multiple displacement sensors can respectively detect packaging bags in different placement slots, and display the detection results on the LCD screen for operators to observe and record, which simplifies the operation process, improves detection efficiency, and reduces human errors.

[0028] 3. The present invention realizes the sealing performance test of the packaging bag at different temperatures by setting a heating component in the detection box. The sealing plate can be easily removed by the handle to install or remove the heating device. Before the test, the temperature in the detection box can be adjusted in advance to change the temperature of the packaging bag. After that, the packaging bag is tested by the detection unit to test the sealing performance of the packaging bag at different temperatures. The operator can manually adjust the position of the limit component by rotating the rod and the hexagonal slot to adapt to packaging bags of different volumes, which further improves the applicability of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] Figure 1 It is a schematic diagram of the main body structure of the present invention.

[0031] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0032] Figure 3 It is a structural schematic diagram of a drawer of the present invention.

[0033] Figure 4 It is a structural schematic diagram of the detection unit of the present invention.

[0034] Figure 5 It is a schematic diagram of the cross-sectional structure of the detection unit of the present invention.

[0035] Figure 6 The present invention Figure 5 A partial enlarged view of the structure at point A.

[0036] Figure 7 The present invention Figure 5 A magnified view of part of the structure at point B.

[0037] Figure 8 It is a schematic diagram of the top view of the structure of the push frame plate of the present invention.

[0038] Fig. 9 It is a structural schematic diagram of the ventilation groove of the present invention.

[0039] Fig.10 It is a schematic structural diagram of the displacement sensor of the present invention.

[0040] Fig.11 It is a planar cross-sectional view of the pusher of the present invention.

[0041] Fig.12 It is a cross-sectional view of the placement unit of the present invention.

[0042] Fig.13 The present invention Fig.12 A magnified view of part of the structure at point C in the middle.

[0043] Fig.14 It is a structural schematic diagram of the heating component of the present invention.

[0044] In the figure, 1, detection box; 10, guide rail; 11, drawer; 12, handle; 13, support plate; 14, push cylinder; 15, liquid crystal display screen; 2, detection unit; 20, push frame plate; 21, structural groove; 22, vacuum device; 23, limit cavity; 24, limit plate; 25, reset spring; 26, rectangular groove; 27, push plate; 28, ventilation groove; 29, limit frame plate; 210, round shaft; 211 , extension plate; 212, push spring; 3, placement unit; 30, rectangular block; 31, placement slot; 32, placement plate; 33, thrust spring; 4, pusher; 40, pressure plate; 41, displacement sensor; 5, limit assembly; 50, rotating cylinder; 51, semicircular piece; 52, rotating rod; 53, hexagonal slot; 6, heating assembly; 60, mounting plate; 61, heating device; 62, mounting slot; 63, blocking plate. DETAILED DESCRIPTION

[0045] The following combination Figures 1 to 14 Embodiments of the present invention are described in detail.

[0046] The embodiment of the present application discloses a method and device for nondestructive detection of soft package leakage, which explains that the present application is mainly used in the process of detecting the sealing of packaging bags. By providing multiple placement devices, multiple packaging bags can be placed and detected simultaneously, and in the detection process, the space around the packaging bag is evacuated into a vacuum by means of vacuum extraction, and the pressure change during the expansion process can be detected to detect whether the packaging bag has leakage, and a pressing device is added to press the surface of the packaging bag to detect whether the sealing of the packaging bag meets the standard under different pressing forces, and each pressing device is installed independently, that is, multiple different types of packaging bags can be placed in each placement device, and they are pressed by corresponding pressing devices, which further improves the applicability of the present invention.

[0047] Example 1: Reference Figure 1 , Figure 2 and Figure 3As shown, it includes a detection box 1, a guide rail 10, a drawer 11, a handle 12, a support plate 13, a pushing cylinder 14, a liquid crystal display screen 15, a detection unit 2 and a placement unit 3. The bottom wall of the detection box 1 is provided with symmetrically distributed guide rails 10, and one side of the detection box 1 is provided with a pull-out groove corresponding to the guide rail 10, and a drawer 11 is slidably arranged between the pull-out groove and the guide rail 10, and a handle 12 is arranged in front of the drawer 11. The drawer 11 can be pulled by the handle 12 to reciprocate under the limit guidance of the guide rail 10 and the pull-out groove, so that the drawer 11 moves or enters into the detection box 1.

[0048] A support plate 13 is also provided on the inner wall of the detection box 1 , and a push cylinder 14 is provided on the support plate 13 through a cylinder seat, and the support plate 13 is used to support the push cylinder 14 ; and a liquid crystal display screen 15 is also provided at the front end of the detection box 1 .

[0049] The telescopic end of the pushing cylinder 14 is provided with a detection unit 2 corresponding to the drawer 11 , and the pushing cylinder 14 can push the detection unit 2 to move toward the drawer 11 .

[0050] A placement unit 3 for placing packaging bags is provided in the drawer 11. After the detection unit 2 is docked to the upper end of the drawer 11, it will correspond to the placement unit 3. At this time, the detection unit 2 will perform a sealing test on the packaging bags in the placement unit 3, and then display the test data through the LCD screen 15, which is convenient for the operator to observe and record.

[0051] Reference Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, the telescopic end of the push cylinder 14 is provided with a detection unit 2 corresponding to the drawer 11; specifically, the detection unit 2 includes a push frame plate 20, a structural groove 21, a vacuum device 22, a limit cavity 23, a limit plate 24, a reset push spring 25, a rectangular groove 26, a push plate 27, a ventilation groove 28, a limit frame plate 29, a round shaft 210, an extension plate 211, a push spring 212 and a push member 4, the push frame plate 20 is arranged at the lower end of the telescopic end of the push cylinder 14, the support plate 13 and the push frame plate 20 are symmetrically provided with structural grooves 21, and the push frame plate 2 0 is installed in the structural groove 21 on the drawer 11. When the distance between the push frame plate 20 and the support plate 13 driven by the push cylinder 14 is close, the structural groove 21 on the support plate 13 is used to accommodate the upper end surface of the vacuum device 22 to prevent the vacuum device 22 from colliding with it. The vacuum device 22 is a well-known technology. When the push frame plate 20 is driven by the push cylinder 14 to contact the upper end of the drawer 11, the vacuum device 22 is started to completely extract the air inside the drawer 11 and the push frame plate 20, so that the packaging bag in the placement unit 3 is in a vacuum state.

[0052] The telescopic end of the pushing cylinder 14 is slidably connected to the pushing frame plate 20, and a limit cavity 23 is provided in the pushing frame plate 20. A limit plate 24 located in the limit cavity 23 is fixedly arranged on the outer side of the telescopic end of the pushing cylinder 14, and the limit plate 24 is slidably connected to the limit cavity 23, and a reset spring 25 is provided between the limit plate 24 and the inner top wall of the limit frame plate 29, that is, in the initial state, the telescopic end of the pushing cylinder 14 drives the pushing frame plate 20 to move toward the drawer 11 through the limit plate 24, the reset spring 25 and the inner top wall of the limit cavity 23. When the bottom of the pushing frame plate 20 contacts the upper end of the drawer 11, the telescopic end of the pushing cylinder 14 continues to move downward, which will drive the limit plate 24 to move in the limit cavity 23, and drive the reset spring 25 to be compressed during the movement.

[0053] A plurality of rectangular grooves 26 distributed in a rectangular shape are provided on the lower side of the push frame 20, and a push plate 27 located inside the push frame 20 is also provided at the telescopic end of the push cylinder 14, and a plurality of circular grooves corresponding to the rectangular grooves 26 are provided on the push plate 27, and a plurality of ventilation grooves 28 distributed in a rectangular shape are also provided on the push plate 27, that is, when the telescopic end of the push cylinder 14 contacts the upper end of the drawer 11 at the limit frame 29, it will continue to drive the push plate 27 to move toward the drawer 11, and the rectangular grooves 26 and the ventilation grooves 28 make the internal area of ​​the limit frame 29 interconnected with the drawer 11, so the vacuum device 22 can extract the gas in the drawer 11 through the corresponding structural grooves 21, the ventilation grooves 28 and the rectangular grooves 26.

[0054] Limiting frame plates 29 are symmetrically arranged on both sides of the circular groove, a circular shaft 210 is slidably arranged in the circular groove, an extension plate 211 located in the corresponding limiting frame plate 29 is arranged on the outer side of the circular shaft 210, a pushing spring 212 is arranged between the extension plate 211 and the inner top wall of the limiting frame plate 29, and a pushing member 4 for pressing the packaging bag is arranged on the side of the circular shaft 210 close to the rectangular groove 26. When the pushing plate 27 descends, the circular shaft 210 will be driven to descend synchronously through the limiting frame plate 29, the pushing spring 212 and the extension plate 211, so that the circular shaft 210 drives the pushing member 4 to descend.

[0055] Continue to refer to Figure 3 and Fig.12 As shown, a placement unit 3 is used to place packaging bags; specifically, the placement unit 3 includes a rectangular block 30, a placement groove 31, a placement plate 32 and a thrust spring 33. Several rectangular blocks 30 corresponding to the rectangular grooves 26 are arranged inside the drawer 11. The rectangular blocks 30 are provided with placement grooves 31, and a placement plate 32 is slidably arranged in the placement grooves 31, that is, the placement plate 32 can move up and down in the placement grooves 31.

[0056] A thrust spring 33 is arranged between the placement plate 32 and the inner bottom wall of the placement groove 31. In the initial state, the thrust spring 33 applies pressure to the placement plate 32 so that the placement plate 32 contacts the inner top wall of the placement groove 31. The operator places the packaging bag in the placement groove 31, and the bottom of the packaging bag contacts the upper end of the placement plate 32. The thrust spring 33 supports the packaging bag through the placement plate 32. At this time, after the vacuum device 22 draws the drawer 11 into a vacuum state, the push cylinder 14 continues to drive the push member 4 to move to the corresponding placement groove 31 to press the upper side of the packaging bag to test the sealing effect of the packaging bag when it is pressed by weight.

[0057] Continue to refer to Figure 7 , Figure 8 , Fig.10 and Fig.11 As shown, the pushing member 4 is used to press the packaging bag; specifically, the pushing member 4 includes a pressing plate 40 and a displacement sensor 41. The pressing plate 40 is arranged on the side of the circular shaft 210 away from the circular groove, that is, when the pushing frame plate 20 contacts the upper end of the drawer 11, the telescopic end of the pushing cylinder 14 continues to move downward, thereby indirectly driving the circular shaft 210 to move downward. During the movement, the circular shaft 210 can drive the pressing plate 40 to enter the placement groove 31 to press the packaging bag on the placement plate 32. In the pressing process, the pressing plate 40 will push the placement plate 32 to move downward in the placement groove 31 through the packaging bag, thereby driving the corresponding thrust spring 33 to be compressed, and the thrust of the thrust spring 33 in this process will gradually increase, that is, the thrust borne by the packaging bag will also gradually increase, to test the sealing of the packaging bag under different thrust conditions.

[0058] A plurality of displacement sensors 41 corresponding to the circular shaft 210 are also arranged on the inner top wall of the push frame plate 20. When the pressing plate 40 contacts the packaging bag, the environment around the packaging bag is vacuum, that is, the packaging bag will expand at this time, so that the pressing plate 40 exerts a reaction force on the circular shaft 210, and the push plate 27 continues to move downward, while the circular shaft 210 moves upward relative to the push plate 27. The displacement sensor 41 monitors the moving speed between the circular shaft 210 and the push plate 27 to judge the sealing performance of the packaging bag. The principle is as follows:

[0059] When the push plate 27 drives the circular shaft 210 to move synchronously, the displacement sensor 41 determines that the pressing plate 40 has not yet contacted the packaging bag.

[0060] When the pressing plate 40 contacts the packaging bag and is indirectly driven to move upward by the packaging bag in the process of expansion, the displacement sensor 41 detects that the circular shaft 210 moves upward relative to the push plate 27. The displacement sensor 41 determines that the packaging bag is expanding at this time without leakage and has good sealing.

[0061] When the packaging bag leaks, it will not expand but will be flattened by the pressing plate 40 and the placing plate 32. At this time, the round shaft 210 is no longer subjected to the reaction force transmitted back by the pressing plate 40, and will drive the pressing plate 40 to move toward the lower end under the indirect drive of the corresponding pushing spring 212. The displacement sensor 41 detects the sudden drop of the round shaft 210, thereby judging that the packaging bag has been deflated, and the anti-compression ability of the packaging bag is inferred based on the falling distance of the pushing plate 27 at this time.

[0062] It should be noted that the "displacement sensor 41" in the above implementation process is a well-known technology. Its role in this implementation process is to judge the descending and ascending distances between the circular shaft 210 and the push plate 27, so as to determine whether the sealing performance of the packaging bag is intact, as well as the sealing ability of the packaging bag under different pressure covering forces. Therefore, this implementation process will not be repeated.

[0063] The thrust of the reset spring 25 is greater than that of the thrust spring 33, that is, during the pressing process of the pressing plate 40, if the packaging bag suddenly leaks, the pressing plate 40 and the placement plate 32 will move in relative directions. At this time, after the pressing plate 40 and the placement plate 32 come into hard contact, the placement plate 32 will be pushed down, so that the corresponding displacement sensor 41 can detect that the circular shaft 210 has dropped significantly.

[0064] The plurality of displacement sensors 41 can respectively detect the packaging bags in the corresponding placement slots 31 , so that different types of packaging bags can be placed in the placement slots 31 , and the detection results will be displayed on the LCD screen 15 for the operator to observe and record.

[0065] Example 2: Continue to refer to Fig.12 and Fig.13 As shown, on the basis of Example 1, in order to limit the placement plate 32, the placement plate 32 can cooperate with the pressure plate 40 to move synchronously with the pressure plate 40, or remain stationary, so that when some smaller packaging bags are tested, if the packaging bags are deflated, the pressure plate 40 and the placement plate 32 will move relative to each other, and when the pressure plate 40 pushes the placement plate 32 to move downward, it will be pushed by the corresponding thrust spring 33, thereby reducing the moving speed and distance, and the displacement sensor 41 cannot detect the moving distance of the corresponding circular shaft 210. In order to avoid the above situation, a rotating cavity is opened inside the rectangular block 30, and the outer side of the rotating cavity is provided with a limiting component 5 for limiting the placement plate 32.

[0066] Specifically, the limiting assembly 5 includes a rotating cylinder 50, a semicircular piece 51, a rotating rod 52 and a hexagonal groove 53. The rotating cylinder 50 is rotatably arranged in a rotating cavity. Several semicircular pieces 51 distributed along the axis are arranged on the outside of the rotating cylinder 50. The semicircular pieces 51 are only distributed in an area of ​​180 degrees on the outside of the rotating cylinder 50. A semicircular groove is opened on the side of the placement plate 32 facing the rotating cavity, and the corresponding semicircular piece 51 is located in the semicircular groove, that is, the rotating cylinder 50 can be driven to rotate in the circular groove by external force, and the semicircular piece 51 on the outside can be driven to rotate synchronously during the rotation process. When the semicircular piece 51 enters into the semicircular groove on the corresponding placement plate 32, the placement plate 32 can be limited by the semicircular groove. At this time, when the pressing plate 40 continues to press the packaging bag, the placement plate 32 will not move downward.

[0067] The rotating cylinder 50 is driven to rotate again so that the semicircular piece 51 is no longer located in the semicircular groove. At this time, the placement plate 32 can move up and down when driven by external force. When dealing with some larger packaging bags, when the packaging bag is in contact with the placement plate 32, the upper end of the packaging bag is located outside the placement groove 31. Therefore, before placing the packaging bag, the placement plate 32 is manually pressed down in the placement groove 31, and then the semicircular piece 51 is driven into the semicircular groove to limit the placement plate 32. At this time, when the packaging bag is placed again, the packaging bag will completely enter the placement groove 31.

[0068] A rotating rod 52 is rotatably passed through the upper side of the rectangular block 30, one end of which is located in the circular groove and connected to one side of the rotating cylinder 50. A hexagonal groove 53 is provided on one side of the rotating rod 52 located on the outer side of the rectangular block 30, that is, the operator can insert a hexagonal wrench into the hexagonal groove 53 to drive the rotating rod 52 to rotate, so that the rotating rod 52 can drive the rotating cylinder 50 to rotate.

[0069] Example 3: Reference Fig.14As shown, on the basis of Example 1 and Example 2, in order to be able to test the sealing performance of the packaging bag at different temperatures, a heating component 6 is arranged on the inner bottom wall of the detection box 1, and the heating component 6 includes a mounting plate 60, a heating device 61, a mounting groove 62 and a sealing plate 63. The mounting plates 60 are symmetrically arranged on the inner bottom wall of the detection box 1, and the heating device 61 is installed between the mounting plates 60. A mounting groove 62 corresponding to the heating device 61 is also opened on the rear side of the detection box 1, and a sealing plate 63 is installed in the mounting groove 62. A handle is also provided on the side of the sealing plate 63 located outside the detection box 1, and the sealing plate 63 can be removed from the mounting groove 62 by the handle, so that the operator can install the heating device 61 between the mounting plates 60. The heating device 61 is a well-known technology. Before the detection, the temperature in the detection box 1 can be increased in advance, so that the temperature of the packaging bag changes. After the temperature changes, the packaging bag is detected by the detection unit 2 to test the sealing performance of the packaging bag at different temperatures.

[0070] In addition, the present invention also provides a method for non-destructive detection of soft package leakage, comprising the following steps:

[0071] S1, packaging bag placement: pull the drawer 11 out of the detection box 1 through the handle 12, then place the packaging bag in the placement unit 3, and finally push the drawer 11 back into the detection box 1 from the drawer slot.

[0072] S2, vacuum detection: the pushing cylinder 14 drives the pushing frame plate 20 to contact the upper end surface of the drawer 11, and then the environment in the drawer 11 is evacuated to a vacuum state through the vacuum device 22, and the detection unit 2 detects the pressure change of the packaging bag.

[0073] S3, compression testing: the testing unit 2 applies pressure to the upper end of the packaging bag to test the sealing performance of the packaging bag under different compression forces.

[0074] S4, taking out the packaging bag: after the inspection is completed, the push cylinder 14 indirectly drives the push plate 27 to move to the initial position, the drawer 11 is taken out from the drawer slot, and finally the packaging bag is taken out from the placement unit 3.

[0075] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0076] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A non-destructive detection device for leaking a soft package, comprising a detection box (1), characterized in that: The inner bottom wall of the detection box (1) is provided with symmetrically distributed guide rails (10), one side of the detection box (1) is provided with a drawer groove corresponding to the guide rail (10), and a drawer (11) is slidably arranged between the drawer groove and the guide rail (10), a handle (12) is arranged in front of the drawer (11), and a support plate (13) is also arranged on the inner side wall of the detection box (1), and a push cylinder (14) is arranged on the support plate (13) through a cylinder seat; The telescopic wall of the pushing cylinder (14) is provided with a detection unit (2) corresponding to the drawer (11); The drawer (11) is provided with a placement unit (3) for placing packaging bags; The detection unit (2) comprises a push frame plate (20) arranged at the lower end of the telescopic end of the push cylinder (14), the support plate (13) and the push frame plate (20) are symmetrically provided with structural grooves (21), and a vacuum device (22) is installed in the structural groove (21) on the push frame plate (20); The lower side of the push frame plate (20) is provided with a plurality of rectangular grooves (26) distributed in a rectangular shape, and the telescopic end of the push cylinder (14) is further provided with a push plate (27) located inside the push frame plate (20), and the push plate (27) is provided with a plurality of circular grooves corresponding to the rectangular grooves (26); The push plate (27) is also provided with a plurality of ventilation grooves (28) distributed in a rectangular shape; Limiting frame plates (29) are symmetrically arranged on both sides of the circular groove, a circular shaft (210) is slidably arranged in the circular groove, an extension plate (211) located in the corresponding limiting frame plate (29) is arranged outside the circular shaft (210), and a pushing member (4) for pressing the packaging bag is arranged on the side of the circular shaft (210) close to the rectangular groove (26).

2. The nondestructive detection device for soft package leakage according to claim 1, characterized in that: The telescopic end of the push cylinder (14) is slidably connected to the push frame plate (20), a limit cavity (23) is provided in the push frame plate (20), a limit plate (24) located in the limit cavity (23) is fixedly arranged outside the telescopic end of the push cylinder (14), and a return spring (25) is arranged between the limit plate (24) and the inner top wall of the limit frame plate (29).

3. The nondestructive detection device for soft package leakage according to claim 1, characterized in that: A pushing spring (212) is provided between the extension plate (211) and the inner top wall of the limiting frame plate (29).

4. The nondestructive detection device for soft package leakage according to claim 1, characterized in that: The placement unit (3) comprises a plurality of rectangular blocks (30) arranged inside the drawer (11) and corresponding to the rectangular grooves (26) one by one. The rectangular blocks (30) are provided with placement grooves (31). A placement plate (32) is slidably arranged inside the placement groove (31). A thrust spring (33) is arranged between the placement plate (32) and the inner bottom wall of the placement groove (31).

5. The nondestructive detection device for soft package leakage according to claim 1, characterized in that: The pushing member (4) comprises a pressing plate (40) arranged on a side of the circular shaft (210) away from the circular groove, and the pressing plate (40) corresponds to the placement groove (31) one by one.

6. The nondestructive detection device for soft package leakage according to claim 1, characterized in that: A plurality of displacement sensors (41) corresponding one to one with the circular shafts (210) are also arranged on the inner top wall of the push frame plate (20).

7. A method for non-destructive detection of soft package leakage, using a non-destructive detection of soft package leakage device according to any one of claims 1 to 6, characterized in that: The detection method includes the following steps: S1, packaging bag placement: pull the drawer (11) out of the detection box (1) by means of the handle (12), then place the packaging bag in the placement unit (3), and finally push the drawer (11) back into the detection box (1) from the drawer slot; S2, vacuum testing: the pushing cylinder (14) drives the pushing frame plate (20) to contact the upper end surface of the drawer (11), and then the environment in the drawer (11) is evacuated to a vacuum state through the vacuum device (22), and the detection unit (2) detects the pressure change of the packaging bag; S3, compression test: the testing unit (2) applies pressure to the upper end of the packaging bag to test the sealing performance of the packaging bag under different compression forces; S4, taking out the packaging bag: after the inspection is completed, the push cylinder (14) indirectly drives the push plate (27) to move to the initial position, the drawer (11) is taken out from the drawer slot, and finally the packaging bag is taken out from the placement unit (3).

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