Air tightness detection device for low-pressure plastic bag

Abstract

The utility model provides an air tightness detection device for a low pressure plastic bag, which comprises a detection base body and a water outlet pipeline, the side end of the detection base body is provided with a driving assembly, the output end of the driving assembly is provided with a detection frame, the side end of the detection frame is provided with a clamping block structure, and the top of the clamping block structure is slidably provided with a limiting sealing assembly. A positioning locking assembly is arranged at the side end of the limiting sealing assembly, and a self-adaptive limiting piece is arranged at the side end of the detection frame. According to the air tightness detection device for the low-pressure plastic bag provided by the utility model, one end of the plastic bag can be quickly and reliably sealed and locked through the cooperative use of the limiting sealing assembly and the positioning locking assembly, and meanwhile, the air tightness detection device can be automatically limited and locked according to the position of the clamping block structure during use. In addition, through a self-adaptive limiting piece arranged at the side end of the detection device, real-time adjustment and accurate positioning can be carried out according to the actual inflation position of the plastic bag so as to adapt to plastic bags of various specifications.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology for plastic bags, and in particular to an airtightness testing device for low-pressure plastic bags. Background Technology

[0002] Low-pressure plastic bags are widely used in many industries such as food, pharmaceuticals, chemicals, and electronics for packaging various products. These industries have high requirements for the airtightness of plastic bags because good airtightness can prevent products from getting damp, oxidizing, and deteriorating, as well as prevent external contaminants from entering the packaging, thereby ensuring the quality and safety of the products.

[0003] Existing detection devices often rely on various fasteners to seal and limit the plastic bag during use. However, in the later sealing process, it is not convenient to limit the position of the plastic bag and the structure for sealing. This can lead to uneven pressure and complicated procedures. Furthermore, during the later inflation process, the plastic bag is prone to over-inflation, which can cause displacement.

[0004] Therefore, it is necessary to provide an airtightness testing device for low-pressure plastic bags to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides an airtightness testing device for low-pressure plastic bags, which solves the problem of inconsistent pressure and cumbersome procedures caused by the inconvenient method of limiting and sealing the position of the plastic bag based on its position relative to the structure.

[0006] To solve the above-mentioned technical problems, this utility model provides an airtightness testing device for low-pressure plastic bags, comprising: a testing substrate and a water outlet pipe. The water outlet pipe is installed on the inner wall of the bottom of the testing substrate for discharging water from inside the testing substrate. A driving component is provided on the side of the testing substrate, and a testing frame is installed on the output end of the driving component. A locking block structure is provided on the side of the testing frame for clamping and limiting the plastic bag. A limiting sealing component slides on the top of the locking block structure for limiting the position of the locking block structure. A positioning locking component is provided on the side of the limiting sealing component for locking the position of the limiting sealing component. An adaptive limiting component is provided on the side of the testing frame.

[0007] Preferably, the driving assembly includes a drive motor, a rotating rod, and an arc-shaped slide groove. The drive motor output end is equipped with a drive rod, the rotating rod is installed on the side end of the detection frame, and limit rods are provided at both ends of the detection frame for limiting the position of the detection frame. The arc-shaped slide groove is formed at both ends of the detection base for limiting the structure of the limit rods.

[0008] Preferably, the card block structure includes a fixed card block and a positioning groove. The fixed card block is disposed on the side end of the detection frame. The detection frame and the side end of the fixed card block are both provided with positioning grooves for fixing the position of the card block. An air inlet pipe is provided on the side end of the fixed card block for air intake treatment of the plastic bag.

[0009] Preferably, the limiting sealing assembly includes a locking sliding frame that slides on the side of the detection frame. Fixed blocks are slidably connected to the bottom of both ends of the locking sliding frame. A locking limiting plate is fixed to the bottom of the fixed block for locking the position of the block structure. An elastic element is provided between the inner walls of the fixed blocks for adjusting the position of the locking limiting plate.

[0010] Preferably, the positioning and locking assembly includes a locking groove and a locking rod. The locking groove is formed at both ends of the limiting sealing assembly, and a locking bolt is provided at the top of the locking rod for locking the position of the limiting sealing assembly.

[0011] Preferably, the adaptive limiting component includes a top limiting block and a side limiting block, and both ends of the detection frame are provided with fixing grooves. The bottom of the top limiting block and the side limiting block are each equipped with a telescopic reset component for resetting and locking the top limiting block and the side limiting block.

[0012] Compared with related technologies, the airtightness testing device for low-pressure plastic bags provided by this utility model has the following advantages:

[0013] This invention provides an airtightness testing device for low-pressure plastic bags. To improve efficiency during the airtightness testing process, the device utilizes a combination of a limiting sealing component and a positioning locking component to quickly and reliably seal one end of the plastic bag. Simultaneously, the sealing component automatically locks itself according to the position of the locking block structure and applies pressure evenly to the sealed area of ​​the plastic bag, reducing the labor intensity of the operation. Furthermore, an adaptive limiting component on the side of the testing device can adjust and precisely position itself in real time according to the actual inflation position of the plastic bag, accommodating various sizes of plastic bags and reducing excessive expansion and displacement due to excessive internal pressure during inflation. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of the airtightness testing device for low-pressure plastic bags provided by this utility model;

[0015] Figure 2 for Figure 1 The diagram shows the structure of the arc-shaped chute.

[0016] Figure 3 for Figure 1The diagram shows the structural schematic of the detection framework.

[0017] Figure 4 for Figure 1 The diagram shows the structure of the side restraint block;

[0018] Figure 5 for Figure 1 The diagram shows the structure of the locking sliding frame.

[0019] The diagram is labeled as follows: 1. Detection substrate, 2. Water outlet pipe, 3. Drive assembly, 31. Drive motor, 32. Drive rod, 33. Rotating rod, 34. Limiting rod, 35. Arc-shaped slide groove, 4. Detection frame, 5. Locking block structure, 51. Fixed locking block, 52. Air inlet pipe, 53. Positioning groove, 6. Limiting sealing assembly, 61. Locking sliding frame, 62. Locking limiting plate, 63. Fixed block, 64. Elastic element, 7. Positioning locking assembly, 71. Locking vertical groove, 72. Locking rod, 73. Locking bolt, 8. Adaptive limiting element, 81. Fixed groove, 82. Top limiting block, 83. Side limiting block, 84. Telescopic reset element. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 A schematic diagram of a preferred embodiment of the airtightness testing device for low-pressure plastic bags provided by this utility model; Figure 2 for Figure 1 The diagram shows the structure of the arc-shaped chute. Figure 3 for Figure 1 The diagram shows the structural schematic of the detection framework. Figure 4 for Figure 1 The diagram shows the structure of the side restraint block; Figure 5 for Figure 1The diagram shows the structure of the locking sliding frame. An airtightness testing device for low-pressure plastic bags includes: a testing substrate 1 and a water outlet pipe 2. The water outlet pipe 2 is installed on the inner wall of the bottom of the testing substrate 1 for discharging water from inside the testing substrate 1. A driving assembly 3 is provided on the side of the testing substrate 1. A testing frame 4 is installed at the output end of the driving assembly 3. A locking block structure 5 is provided on the side of the testing frame 4 for locking and limiting the plastic bag. A limiting sealing assembly 6 slides on the top of the locking block structure 5 for limiting the position of the locking block structure 5. A positioning locking assembly 7 is provided on the side of the limiting sealing assembly 6 for locking the position of the limiting sealing assembly 6. An adaptive limiting member 8 is provided on the side of the testing frame 4.

[0022] The drive assembly 3 includes a drive motor 31, a rotating rod 33, and an arc-shaped slide groove 35. The output end of the drive motor 31 is equipped with a drive rod 32. The rotating rod 33 is installed on the side of the detection frame 4. Limiting rods 34 are provided at both ends of the detection frame 4 for limiting the position of the detection frame 4. The arc-shaped slide groove 35 is opened at both ends of the detection base 1 for limiting the structure of the limiting rods 34.

[0023] During use, the detection device can fully immerse the plastic bag in the detection liquid through the drive component 3 set on the side, and the angle can be adjusted conveniently and accurately.

[0024] The drive component 3 includes, but is not limited to, electric drive, pneumatic drive, and hydraulic drive; in this embodiment, the drive component 3 is preferably electric drive.

[0025] The card block structure 5 includes a fixed card block 51 and a positioning groove 53. The fixed card block 51 is set on the side of the detection frame 4. The detection frame 4 and the side of the fixed card block 51 are both provided with positioning grooves 53 for positioning the fixed card block 51. The side of the fixed card block 51 is provided with an air inlet pipe 52 for air intake treatment of the plastic bag.

[0026] When locking and clamping the plastic bag, one end of the plastic bag can be installed onto the inner wall of the fixing block 51 first, and then the entire fixing block 51 can be locked and clamped into the positioning groove 53 on the side to facilitate the locking position. At the same time, it can reduce the phenomenon of insufficient sealing caused by structural position deviation.

[0027] The card block structure 5 includes, but is not limited to, fixed card blocks, adjustable card blocks, and automatic card blocks; in this embodiment, the card block structure 5 is preferably a fixed card block.

[0028] The limiting sealing assembly 6 includes a locking sliding frame 61, which slides on the side of the detection frame 4. Fixed blocks 63 are slidably connected to the bottom of both ends of the locking sliding frame 61. A locking limiting plate 62 is fixed to the bottom of the fixed block 63 for locking the position of the block structure 5. An elastic element 64 is provided between the inner walls of the fixed block 63 for adjusting the position of the locking limiting plate 62.

[0029] When sealing the plastic bag, the locking limiting plates 62 at both ends of the bottom can be slidably adjusted first. After adjustment, the locking sliding frame 61 at the top can be slidably limited up and down. With the cooperation of the locking limiting plates 62 and the locking sliding frame 61, the sealing and positioning can be conveniently performed according to the position of the card block structure 5, reducing the cumbersome process in the later stages.

[0030] The limiting sealing component 6 includes, but is not limited to, rubber sealing, pneumatic sealing, and magnetic sealing; in this embodiment, the limiting sealing component 6 is preferably rubber sealing.

[0031] The positioning and locking assembly 7 includes a locking vertical groove 71 and a locking rod 72. The locking vertical groove 71 is formed at both ends of the limiting sealing assembly 6. The top of the locking rod 72 is provided with a locking bolt 73 for locking the position of the limiting sealing assembly 6.

[0032] Once the limiting sealing assembly 6 is adjusted to the appropriate position, the structural position can be locked and fixed by the locking bolt 73 on the inner wall of the locking rod 72, preventing the structure from loosening or deviating during use.

[0033] The positioning and locking component 7 includes, but is not limited to, mechanical locking, electromagnetic locking, and hydraulic locking; in this embodiment, the positioning and locking component 7 is preferably mechanical locking.

[0034] The adaptive limiting component 8 includes a top limiting block 82 and a side limiting block 83. The detection frame 4 has fixing grooves 81 at both ends. The bottom of the top limiting block 82 and the side limiting block 83 are equipped with telescopic reset components 84 for resetting and locking the top limiting block 82 and the side limiting block 83.

[0035] When the plastic bag is inflated, the top limiting block 82 and the side limiting block 83 with padding at both ends will automatically cushion and support the inner wall of the plastic bag, reducing damage caused by over-inflation and positional deviation.

[0036] The adaptive limiting element 8 includes, but is not limited to, mechanical limiting elements and sensor-driven limiting elements; in this embodiment, the adaptive limiting element 8 is preferably a mechanical limiting element.

[0037] The working principle of the airtightness testing device for low-pressure plastic bags provided by this utility model is as follows:

[0038] When the device performs an airtightness test on a plastic bag, firstly, the locking block structure 5 is placed at one end of the plastic bag's inlet. Then, the locking block structure 5 is locked and clamped to the inner wall of the side end of the detection frame 4. Subsequently, the limiting and sealing components 6 at both ends of the locking block structure 5 are adjusted to appropriate positions and locked and fixed by the positioning and locking components 7 at the top. This reduces the cumbersome procedures and inconveniences during use. After installation, the plastic bag inside is inflated. During the expansion of the plastic bag, the self-adaptive limiting components 8 at both ends will automatically adapt to the inflation and expansion of the plastic bag under the elastic action, preventing over-inflation.

[0039] Compared with related technologies, the airtightness testing device for low-pressure plastic bags provided by this utility model has the following advantages:

[0040] In the airtightness testing process of plastic bags, to improve the efficiency of the device, the limiting sealing component 6 and the positioning locking component 7 work together to quickly and reliably seal one end of the plastic bag. Simultaneously, the sealing component automatically limits and locks itself according to the position of the locking block structure 5, and applies pressure evenly to the sealed area of ​​the plastic bag, reducing the labor intensity of the operation. Furthermore, the adaptive limiting component 8 on the side of the testing device can adjust and precisely position itself in real time according to the actual inflation position of the plastic bag, accommodating various sizes of plastic bags and reducing excessive expansion and displacement due to excessive internal pressure during inflation.

[0041] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for detecting the air tightness of a low pressure plastic bag, characterized in that, include: The system includes a detection substrate and a water outlet pipe. The water outlet pipe is installed on the inner wall of the bottom of the detection substrate to detect the discharge of water from the substrate. A drive assembly is provided on the side of the detection substrate, and a detection frame is installed at the output end of the drive assembly. A locking block structure is provided on the side of the detection frame for clamping and limiting the plastic bag. A limit sealing component slides on the top of the locking block structure to limit the position of the locking block structure. A positioning locking component is provided on the side of the limit sealing component to lock the position of the limit sealing component. An adaptive limiting component is provided on the side of the detection frame.

2. A device for detecting the air tightness of a low pressure plastic bag according to claim 1, wherein The driving assembly includes a drive motor, a rotating rod, and an arc-shaped slide groove. The drive motor output end is equipped with a drive rod, the rotating rod is installed on the side end of the detection frame, and limit rods are provided at both ends of the detection frame for limiting the position of the detection frame. The arc-shaped slide groove is formed at both ends of the detection base for limiting the structure of the limit rods.

3. A device for detecting the air tightness of a low pressure plastic bag according to claim 1, wherein, The card block structure includes a fixed card block and a positioning groove. The fixed card block is set on the side of the detection frame. The detection frame and the side of the fixed card block are both provided with positioning grooves for fixing the position of the card block. An air inlet pipe is provided on the side of the fixed card block for air intake treatment of the plastic bag.

4. The air tightness testing device for low pressure plastic bags of claim 1, wherein, The limiting sealing assembly includes a locking sliding frame that slides on the side of the detection frame. Fixed blocks are slidably connected to the bottom of both ends of the locking sliding frame. A locking limiting plate is fixed to the bottom of the fixed block for locking the position of the block structure. Elastic elements are provided between the inner walls of the fixed blocks for adjusting the position of the locking limiting plate.

5. The air tightness testing device for low pressure plastic bags of claim 1, wherein, The positioning and locking assembly includes a locking vertical groove and a locking rod. The locking vertical groove is formed at both ends of the limiting sealing assembly, and a locking bolt is provided at the top of the locking rod for locking the position of the limiting sealing assembly.

6. The air tightness testing device for low pressure plastic bags of claim 1, wherein, The adaptive limiting component includes a top limiting block and a side limiting block. Fixed grooves are provided at both ends of the detection frame. Telescopic reset components are installed at the bottom of the top limiting block and the side limiting block for resetting and locking the top limiting block and the side limiting block.

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