Device for detecting moisture permeability of PET (Polyethylene Terephthalate) film

Abstract

The invention relates to the technical field of film detection, and particularly discloses a PET film moisture penetrability detection device which comprises a constant-temperature box, a control panel is fixedly mounted on the outer surface of the constant-temperature box, a box door is arranged on the outer surface of the constant-temperature box, a rotating rod is rotatably connected to an inner cavity of the constant-temperature box, and a motor is arranged in an inner cavity of the bottom end of the constant-temperature box. The distilled water can be prevented from being in contact with an external environment through the detection assembly, the distilled water can be directly injected, the injected distilled water can be quantitatively discharged, meanwhile, the injection amount can be adjusted according to experiment requirements, the moisture permeable cup can be automatically sealed after distilled water injection is completed, misoperation caused by traditional distilled water injection is avoided, and the production efficiency is improved. Whether equipment is inclined or not can be judged through the alarm assembly, an alarm is given out in time when the equipment is inclined, the equipment can be conveniently and rapidly maintained, and the situation that the contact area or contact mode between distilled water and a PET film is changed due to equipment inclination, so that the moisture transmittance is affected, and the test error is increased is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of film detection, and in particular to a device for detecting the moisture permeability of a PET film. Background Art

[0002] PET (polyethylene terephthalate) film is an important packaging material and is widely used in food, medicine, electronics, daily chemicals and other fields. Its moisture permeability, that is, water vapor permeability, is one of the key indicators for evaluating the barrier properties of PET film. The moisture permeability is directly related to the shelf life of the packaged product, the moisture and mildew proof effect, and the overall quality of the product. Therefore, it is particularly important to accurately and efficiently test the moisture permeability of PET film. The inverted cup method is a commonly used method for testing the moisture permeability of films. As the accuracy requirements for test data become higher and higher, the inverted cup method still has many shortcomings when testing the moisture permeability of PET film.

[0003] The existing technology still has the following problems:

[0004] 1. The traditional inverted cup method requires that distilled water be poured into the permeable cup, the mouth of the cup be sealed with a PET film, and then the permeable cup be turned over with the mouth of the cup facing downwards and placed in a constant temperature box to remain still. This operation is relatively complicated, and weighing the water wastes testing time. Each time water is added, it is easily affected by environmental factors such as temperature and humidity, resulting in increased instability of the test results. It also requires higher operating skills and is prone to leakage due to improper operation, thereby affecting the accuracy of the test results. In addition, when adding water, although distilled water is used, it is difficult to ensure that the distilled water does not contain impurities during the treatment process, which reduces the accuracy of the test data.

[0005] 2. Traditional detection devices cannot observe whether the equipment is tilted as a whole. The tilt of the equipment may cause the contact area or contact mode between the distilled water and the PET film to change, thereby affecting the water permeability. This change may cause the test results to deviate from the true value, resulting in an increase in the test error. Summary of the invention

[0006] In order to overcome the complexity of the traditional inverted cup method, weighing water wastes detection time, and each time water is added, it is easily affected by environmental factors such as temperature and humidity, resulting in increased instability of the test results, and requires higher operating skills. It is easy to cause leakage due to improper operation, thereby affecting the accuracy of the test results. In addition, when adding water, although distilled water is used, it is difficult to ensure that the distilled water does not contain impurities during the treatment process, which reduces the accuracy of the test data. The tilt of the equipment may cause the contact area or contact mode between the distilled water and the PET film to change, thereby affecting the water permeability. This change may cause the test results to deviate from the true value, resulting in increased test errors and other shortcomings. The purpose of the present invention is to provide a PET film moisture permeability detection device to solve the above-mentioned shortcomings.

[0007] The present application provides a device for detecting the moisture permeability of a PET film, comprising a constant temperature box, a control panel fixedly installed on the outer surface of the constant temperature box, a box door arranged on the outer surface of the constant temperature box, a rotating rod rotatably connected to the inner cavity of the constant temperature box, a motor arranged in the inner cavity at the bottom end of the constant temperature box, the output end of the motor is sleeved with the bottom end of the rotating rod, a support table is fixedly connected to the top end of the rotating rod, a detection component is arranged on the outer surface of the constant temperature box, an alarm component is fixedly installed on the inner wall of the constant temperature box, a second groove is provided on the outer surface of the support table, a limiting groove is provided on the upper surface of the support table, the detection component comprises a filtering mechanism, an adjusting mechanism is provided at the bottom end of the filtering mechanism, a feeding mechanism is provided at the bottom end of the adjusting mechanism, a film detection mechanism is placed on the upper surface of the support table, the film detection mechanism is located above the limiting groove, and four film detection mechanisms and four limiting grooves are provided.

[0008] Furthermore, the filtering mechanism includes a water storage barrel, a top cover is arranged at the top of the water storage barrel, an inner cavity of the top cover is engaged with a water inlet cover, a slide groove is opened in the inner cavity of the water storage barrel, a filter net is slidably connected to the inner cavity of the slide groove, a first threaded rod is sleeved on the middle part of the filter net, the first threaded rod and the filter net are rotatably connected through a thread, the first threaded rod and the water storage barrel are rotatably connected, the first threaded rod and the top cover are rotatably connected, and a water outlet is opened at the bottom end of the water storage barrel.

[0009] Furthermore, the adjusting mechanism includes a storage cylinder, the inner cavity of the storage cylinder is slidably connected with a telescopic cylinder, the bottom end of the telescopic cylinder is fixedly installed with a chassis, the top of the storage cylinder is fixedly connected with a connecting ring, the connecting ring and the bottom end of the water storage barrel are rotatably connected, the bottom end of the connecting ring is fixedly connected with a first connecting pipe, the inner cavity of the first connecting pipe is slidably connected with a second connecting pipe, the bottom end of the second connecting pipe is fixedly connected with a discharge ring, the discharge ring and the chassis are rotatably connected, a lifting mechanism is provided on the upper surface of the discharge ring, a first connecting frame is provided on the upper surface of the lifting mechanism, the first connecting frame is slidably connected with the second connecting pipe and the telescopic cylinder, the storage cylinder is flush with the bottom end of the first connecting pipe, the upper surface of the first connecting frame is fixedly connected with the first connecting pipe and the bottom end of the storage cylinder, the water outlet is located directly above the first connecting pipe, and the discharge ring and the chassis are rotatably connected.

[0010] Furthermore, the lifting mechanism includes a first fixed block, the inner cavity of the first fixed block is rotatably connected to the second threaded rod, the upper surface of the first fixed block is slidably connected to the slider, the outer surface of the slider is fixedly installed with a driving rod, the four corners of the first fixed block are fixedly installed with a storage rod, the inner cavity of the storage rod is slidably connected to the lifting rod, the upper surface of the lifting rod is fixedly installed with a connecting block, the lower surface of the connecting block is fixedly installed with the driving block, the outer surface of the driving block is provided with a driving groove, the second threaded rod and the slider are rotatably connected by threads, the driving rod and the driving groove are slidably connected, the first fixed block and the unloading ring are fixedly connected, and the connecting block and the first connecting frame are fixedly connected.

[0011] The locking device is connected with the locking device, and the locking device is connected with the locking device to lock the locking device, and the locking device is connected with the locking device to lock the locking device.

[0012] Furthermore, the membrane detection mechanism includes a moisture permeable cup, a PET film sheet is tightly fitted on the bottom end of the moisture permeable cup, a sealing ring is tightly fitted on the bottom end of the PET film sheet, the inner cavity of the moisture permeable cup is connected to a fastening bolt by threaded rotation, a connecting pipe is fixedly installed on the middle part of the top end of the moisture permeable cup, a first fixing rod is fixedly installed on the inner wall of the top end of the moisture permeable cup, a fixing plate is fixedly installed on the bottom end of the first fixing rod, a second spring is provided on the upper surface of the fixing plate, a sealing plate is fixedly connected to the top end of the second spring, the sealing plate is slidably connected to the sealing plate and the first fixing rod, the sealing plate is tightly fitted to the inner wall of the top end of the moisture permeable cup, the sealing ring is placed in the inner cavity of the limiting groove, and the second feeding pipe and the connecting pipe are slidably connected.

[0013] Furthermore, the alarm assembly includes a first fixing plate, the first fixing plate is fixedly connected to the inner wall of the thermostatic box, a horizontal detection mechanism is provided on the outer surface of the first fixing plate, and an alarm mechanism is fixedly installed on the outer surface of the first fixing plate.

[0014] Furthermore, the horizontal detection mechanism includes a fixed frame, which is fixedly connected to the first fixed plate, a first groove is opened on the upper surface of the fixed frame, a rolling rod is provided in the inner cavity of the first groove, a detection block is provided on the outer surface of the rolling rod, the rolling rod and the detection block are rotatably connected, the bottom end of the rolling rod contacts the inner wall of the first groove, a pointer is fixedly installed in the middle part of the detection block, a counterweight block is fixedly connected to the middle part of the bottom end of the detection block, the pointer points to the middle part of the fixed frame, and the first groove is symmetrically distributed about the middle part of the fixed frame.

[0015] Furthermore, the alarm mechanism includes a second fixed rod, one end of the second fixed rod is fixedly connected to the first fixed plate, the other end of the second fixed rod is fixedly connected to the second fixed block, the second fixed plate is fixedly installed on the middle part of the second fixed block, the second connecting rod is fixedly installed on the outer surface of the second fixed plate, the outer surface of the second connecting rod is slidably connected to the third spring, the outer surface of the second fixed plate is provided with an alarm, the outer surface of the second fixed plate is provided with a button, and the outer surface of the second connecting rod is slidably connected to the pressure block.

[0016] Furthermore, the third spring is located between the pressure block and the second fixed plate. There are two pressure blocks and they are symmetrically distributed about the second fixed plate. The alarm is electrically connected to the button. Pressing the button controls the alarm to sound an alarm. There is a gap between the button and the pressure block, and the pressure block fits into the inner cavity of the second groove.

[0017] The technical solution provided by this application has at least the following technical effects or advantages:

[0018] 1. The use of the detection component effectively solves the problems of complicated operation, weighing water, wasting detection time, and being easily affected by environmental factors such as temperature and humidity each time water is added, which increases the instability of the test results and requires higher operating skills. It is also easy to cause leakage due to improper operation, thereby affecting the accuracy of the test results. In addition, when adding water, although distilled water is used, it is difficult to ensure that it does not contain impurities, which reduces the accuracy of the inspection data. The present invention can avoid the contact between distilled water and the external environment through the detection component, and directly add distilled water. The added distilled water can be quantitatively discharged, and the amount of filling can be adjusted according to the experimental requirements. After the distilled water is added, the moisture permeable cup can be automatically sealed to avoid improper operation of traditional distilled water addition. In addition, the added distilled water is filtered, which can greatly improve the accuracy of the inspection results.

[0019] 2. The use of the alarm component effectively solves the problem that the detection device cannot observe whether the device as a whole is tilted. The tilt of the device may cause the contact area or contact mode between the distilled water and the PET film to change, thereby affecting the water permeability. This change may cause the test result to deviate from the true value, resulting in an increase in the test error. The present invention can determine whether the device is tilted through the alarm component, and issue an alarm in time when the device is tilted, which is convenient for rapid maintenance of the device, avoiding the change of the contact area or contact mode between the distilled water and the PET film caused by the tilt of the device, thereby affecting the water permeability and increasing the test error. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present application;

[0021] Figure 2 It is a schematic diagram of the rotating rod structure in the embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of the support platform structure in an embodiment of the present application;

[0023] Figure 4 This is a schematic diagram of the limit groove structure in the embodiment of the present application;

[0024] Figure 5 It is a schematic cross-sectional view of the water storage barrel structure in the embodiment of the present application;

[0025] Figure 6 This is a schematic diagram of the pressure rod structure in the embodiment of the present application;

[0026] Figure 7 This is a schematic diagram of the lifting mechanism structure in an embodiment of the present application;

[0027] Figure 8 It is a schematic diagram of the structure of the feeding mechanism in the embodiment of the present application;

[0028] Fig. 9 This is a schematic diagram of the structure of the membrane detection mechanism in the embodiment of the present application;

[0029] Fig.10 This is a schematic cross-sectional view of the test cup structure in an embodiment of the present application;

[0030] Fig.11 For the embodiment of this application Fig.10 A schematic diagram of the structure enlargement at the center A;

[0031] Fig.12 This is a schematic diagram of the structure of the alarm component in an embodiment of the present application;

[0032] Fig.13 This is a schematic diagram of the structure of the level detection mechanism in the embodiment of the present application;

[0033] Fig.14 Schematic diagram of the structure of the alarm mechanism in the embodiment of the present application.

[0034] In the figure: 1, thermostatic box; 2, control panel; 3, box door; 4, rotating rod; 5, support platform; 6, detection component; 61, filtering mechanism; 611, water storage bucket; 612, top cover; 613, water inlet cover; 614, chute; 615, filter screen; 616, first threaded rod; 617, water outlet; 62, adjustment mechanism; 621, storage cylinder; 622, telescopic cylinder; 623, chassis; 624, connecting ring; 625, first connecting pipe; 6 26, second connecting tube; 627, feeding ring; 628, lifting mechanism; 6281, first fixing block; 6282, second threaded rod; 6283, slider; 6284, driving rod; 6285, storage rod; 6286, lifting rod; 6287, connecting block; 6288, driving block; 6289, driving groove; 629, first connecting frame; 63, feeding mechanism; 631, protrusion; 632, second connecting frame; 633, first connecting rod ; 634, first feed pipe; 635, second feed pipe; 636, connecting strip; 637, pressure rod; 638, water outlet; 639, first spring; 64, membrane detection mechanism; 641, moisture permeable cup; 642, PET film; 643, sealing ring; 644, fastening bolt; 645, connecting pipe; 646, first fixing rod; 647, fixing plate; 648, second spring; 649, sealing sheet; 7, alarm component; 71, first fixing Fixed plate; 72, horizontal detection mechanism; 721, fixed frame; 722, first groove; 723, rolling rod; 724, detection block; 725, pointer; 726, counterweight; 73, alarm mechanism; 731, second fixed rod; 732, second fixed block; 733, second fixed plate; 734, second connecting rod; 735, third spring; 736, alarm; 737, button; 738, pressure block; 8, second groove; 9, limit groove. DETAILED DESCRIPTION

[0035] Each time water is added, it is easily affected by environmental factors such as temperature and humidity, which increases the instability of the test results. The present invention can avoid the contact between distilled water and the external environment through the detection component, directly add distilled water, and the added distilled water can be discharged in a quantitative manner. Since it is impossible to observe whether the equipment is tilted as a whole, the present invention can determine whether the equipment is tilted through the alarm component, and issue an alarm in time when the equipment is tilted, so as to facilitate rapid maintenance of the equipment.

[0036] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] See also Figure 1 , Figure 2 and Figure 4 As shown, a PET film moisture permeability detection device comprises a thermostatic box 1, a control panel 2 is fixedly installed on the outer surface of the thermostatic box 1, a box door 3 is arranged on the outer surface of the thermostatic box 1, a rotating rod 4 is rotatably connected to the inner cavity of the thermostatic box 1, a motor is arranged in the inner cavity at the bottom end of the thermostatic box 1, the output end of the motor is sleeved with the bottom end of the rotating rod 4, a support table 5 is fixedly connected to the top end of the rotating rod 4, a detection component 6 is arranged on the outer surface of the thermostatic box 1, an alarm component 7 is fixedly installed on the inner wall of the thermostatic box 1, a second groove 8 is provided on the outer surface of the support table 5, and a limiting groove 9 is provided on the upper surface of the support table 5. The limiting groove 9 is used to place the membrane detection mechanism 64 more stably on the support platform 5. When conducting the test, the film to be tested is placed in the inner cavity of the constant temperature box 1 and the box door 3 is closed. The temperature, humidity and other environmental factors in the constant temperature box 1 are controlled by the control panel 2. After adjustment, an equal amount of water is added through the detection component 6. Relatively pure distilled water is used to implement the inverted cup method for moisture permeability detection. The rotating rod 4 is used to rotate to facilitate continuous loading. The support platform 5 is used for support. The alarm component 7 and the second groove 8 are used to detect whether the equipment as a whole remains stable, that is, to ensure that the water in the equipment does not tilt during detection.

[0038] See also Figure 3 and Figure 4 As shown, the detection component 6 includes a filtering mechanism 61, an adjusting mechanism 62 is provided at the bottom end of the filtering mechanism 61, a feeding mechanism 63 is provided at the bottom end of the adjusting mechanism 62, a membrane detection mechanism 64 is placed on the upper surface of the support table 5, the membrane detection mechanism 64 is located above the limiting groove 9, and there are four membrane detection mechanisms 64 and limiting grooves 9. The filtering mechanism 61 is used to filter the distilled water to reduce the content of impurities, the adjusting mechanism 62 is used to adjust the amount of distilled water, the feeding mechanism 63 is used to add distilled water, and the membrane detection mechanism 64 is used to store distilled water and prevent the detection of thin films on the limiting groove 9.

[0039] See also Figure 4 and Figure 5As shown, the filtering mechanism 61 includes a water storage barrel 611, a top cover 612 is provided at the top of the water storage barrel 611, a water inlet cover 613 is engaged in the inner cavity of the top cover 612, a slide groove 614 is provided in the inner cavity of the water storage barrel 611, a filter screen 615 is slidably connected to the inner cavity of the slide groove 614, a first threaded rod 616 is sleeved on the middle part of the filter screen 615, the first threaded rod 616 and the filter screen 615 are rotatably connected by a thread, the first threaded rod 616 and the water storage barrel 611 are rotatably connected, the first threaded rod 616 and the top cover 612 are rotatably connected, and the bottom end of the water storage barrel 611 is A water outlet 617 is provided, and the water inlet cover 613 is opened to allow distilled water to be poured into the inner cavity of the water storage barrel 611 from the water inlet cover 613 on the top cover 612. At this time, the first threaded rod 616 is rotated to allow the filter screen 615 to slide in the inner cavity of the slide groove 614, and the filter screen 615 is moved from the bottom end of the water storage barrel 611 to the top end of the water storage barrel 611 to filter the distilled water in the water storage barrel 611, so that the distilled water flowing out of the water outlet 617 is purer, the content of impurities is reduced, and the purity of water is improved, which can minimize interference factors such as impurities and make the test results more accurate.

[0040] See also Figure 5 , Figure 6 and Figure 7As shown, the adjusting mechanism 62 includes a storage cylinder 621, the inner cavity of the storage cylinder 621 is slidably connected with a telescopic cylinder 622, the bottom end of the telescopic cylinder 622 is fixedly installed with a chassis 623, the top of the storage cylinder 621 is fixedly connected with a connecting ring 624, the connecting ring 624 is rotatably connected to the bottom end of the water storage barrel 611, the bottom end of the connecting ring 624 is fixedly connected with a first connecting pipe 625, the inner cavity of the first connecting pipe 625 is slidably connected with a second connecting pipe 626, the bottom end of the second connecting pipe 626 is fixedly connected with a discharge ring 627, the discharge ring 627 is rotatably connected to the chassis 623, the distilled water in the inner cavities of the first connecting pipe 625 and the second connecting pipe 626 can be filled by rotating the discharge ring 627, and the upper surface of the discharge ring 627 is provided with a lifting ring. The lifting mechanism 628 is provided with a first connecting frame 629 on the upper surface of the lifting mechanism 628, the first connecting frame 629 is slidably connected with the second connecting tube 626 and the telescopic cylinder 622, the storage cylinder 621 is flush with the bottom end of the first connecting tube 625, the upper surface of the first connecting frame 629 is fixedly connected with the first connecting tube 625 and the bottom end of the storage cylinder 621, the water outlet 617 is located directly above the first connecting tube 625, the discharge ring 627 and the chassis 623 are rotatably connected, the lifting mechanism 628 includes a first fixed block 6281, the inner cavity of the first fixed block 6281 is rotatably connected with the second threaded rod 6282, the upper surface of the first fixed block 6281 is slidably connected with a slider 6283, and the outer surface of the slider 6283 is fixedly installed with a drive The first fixed block 6281 is fixedly provided with a storage rod 6285 at the four corners, the inner cavity of the storage rod 6285 is slidably connected with a lifting rod 6286, the upper surface of the lifting rod 6286 is fixedly provided with a connecting block 6287, the lower surface of the connecting block 6287 is fixedly provided with a driving block 6288, the outer surface of the driving block 6288 is provided with a driving groove 6289, the second threaded rod 6282 and the slider 6283 are rotatably connected by threads, the driving rod 6284 and the driving groove 6289 are slidably connected, the first fixed block 6281 and the unloading ring 627 are fixedly connected, the connecting block 6287 and the first connecting frame 629 are fixedly connected, and the capacity of the distilled water is controlled by the first connecting pipe 625 and the second connecting pipe 626. When the amount of distilled water added needs to be increased or decreased, it is only necessary to adjust the position of the second connecting tube 626 in the inner cavity of the first connecting tube 625, that is, by rotating the second threaded rod 6282 to rotate the second threaded rod 6282 in the inner cavity of the first fixed block 6281, the rotation of the second threaded rod 6282 drives the slider 6283 to slide on the first fixed block 6281, the sliding of the first fixed block 6281 drives the driving rod 6284 to move, and the movement of the driving rod 6284 drives the driving rod 6284 to slide on the driving groove 6289 on the driving block 6288, at this time, the height of the connecting block 6287 changes, and the lifting rod 6286 moves in the inner cavity of the storage rod 6285, so that the height of the first connecting frame 629 changes,The height change of the first connecting frame 629 drives the position of the storage tube 621 in the telescopic tube 622 and the position of the first connecting tube 625 in the second connecting tube 626 to change simultaneously, thereby changing the capacity of the inner cavity of the first connecting tube 625 and the second connecting tube 626, and realizing equal filling of distilled water. The amount of distilled water can also be adjusted according to demand to meet the experimental needs, making the test process more stable and controllable.

[0041] See also Figure 6 and Figure 8As shown, the feeding mechanism 63 includes a protrusion 631, a second connecting frame 632 is fixedly installed at the bottom end of the protrusion 631, a first connecting rod 633 is slidably connected to the inner cavity of the second connecting frame 632, the first connecting rod 633 and the bottom end of the chassis 623 are fixedly connected, a first feeding pipe 634 is fixedly connected to the bottom end of the chassis 623, a second feeding pipe 635 is slidably connected to the inner cavity of the first feeding pipe 634, a connecting strip 636 is slidably connected to the inner cavity of the chassis 623, a pressure rod 637 is rotatably connected to the bottom end of the connecting strip 636, a water outlet 638 is provided at the bottom end of the second feeding pipe 635, a first spring 639 is sleeved on the outer surface of the first connecting rod 633, the first spring 639 is located between the second connecting frame 632 and the chassis 623, and the connecting strip 636 is slidably connected to the inner cavity of the first feeding pipe 634. 36 is fixedly connected to the discharge ring 627, a connecting hole is opened on the outer surface of the bottom plate 623, and the connecting hole is located in the top inner cavity of the first feeding pipe 634. The outer surface of the bottom plate 623 begins to rotate in a groove, and the connecting strip 636 is slidably connected to the rotating groove. The second connecting pipe 626 is sleeved with the connecting hole, and the two ends of the protrusion 631 are parallel to the middle protrusion. The bottom end of the pressure rod 637 is flush with the two ends of the protrusion 631. When the connecting strip 636 rotates in the sliding groove, the pressure rod 637 passes through the protrusion of the protrusion 631. The bottom plate 623 and the inner cavity of the upper surface of the thermostat 1 are fixedly connected. When injecting distilled water, first align the inner cavity of the first connecting pipe 625 with the water outlet 617 to fill the inner cavities of the first connecting pipe 625 and the second connecting pipe 626 with distilled water. The groove on the outer surface rotates the upper rotating discharge ring 627. During the rotation process, the connecting ring 624 is used to cover the water outlet 617. Only when the first connecting pipe 625 and the water outlet 617 are aligned can the distilled water in the inner cavity of the water storage barrel 611 enter the inner cavity of the first connecting pipe 625. As the discharge ring 627 rotates, the connecting strip 636 is driven to move. One end of the connecting strip 636 drives the pressure rod 637 to move. When the pressure rod 637 moves to the protrusion 631, the pressure rod 637 contacts the protrusion of the protrusion 631, so that the pressure rod 637 squeezes the protrusion 631. At this time, the protrusion 631 moves downward and drives the second connecting frame 632 to move downward. The downward movement of the second connecting frame 632 drives the second feeding pipe 635 to move downward in the inner cavity of the first feeding pipe 634, so that the second feeding pipe 635 The bottom end of the material pipe 635 is inserted into the inner cavity of the connecting pipe 645. When the second connecting pipe 626 and the first feeding pipe 634 are aligned, the distilled water in the inner cavities of the first connecting pipe 625 and the second connecting pipe 626 enters the inner cavity of the second feeding pipe 635 and flows into the membrane detection mechanism 64 through the water outlet 638. During the movement of the connecting strip 636 in the sliding groove, one end of the sliding groove is aligned with the second connecting pipe 626 and the first feeding pipe 634, and the other end is aligned with the first connecting pipe 625 and the water outlet 617. When the distilled water is added, the unloading ring 627 is rotated again to make the pressure rod 637 disengage from the contact with the protrusion 631. At this time, the elastic force of the first spring 639 drives the second connecting frame 632 to move upward, so that the second connecting frame 632 slides on the first connecting rod 633.At the same time, the bottom end of the second feeding tube 635 is separated from the first feeding tube 634, so that the support platform 5 can rotate to allow multiple membrane detection mechanisms 64 to be filled with distilled water for comparative detection of experimental data.

[0042] See also Figure 4 , Fig. 9 , Fig.10 and Fig.11As shown, the membrane detection mechanism 64 includes a moisture permeable cup 641, the bottom end of the moisture permeable cup 641 is tightly fitted with a PET film sheet 642, the bottom end of the PET film sheet 642 is tightly fitted with a sealing ring 643, the inner cavity of the moisture permeable cup 641 is connected to a fastening bolt 644 by threaded rotation, a connecting pipe 645 is fixedly installed at the middle part of the top end of the moisture permeable cup 641, a first fixing rod 646 is fixedly installed on the inner wall of the top end of the moisture permeable cup 641, a fixing plate 647 is fixedly installed at the bottom end of the first fixing rod 646, a second spring 648 is provided on the upper surface of the fixing plate 647, a sealing sheet 649 is fixedly connected to the top end of the second spring 648, the sealing sheet 649 is slidably connected to the sealing sheet 649 and the first fixing rod 646, and the sealing sheet 649 and the moisture permeable cup 641 are fixedly connected. The inner wall of the top is tightly fitted, and the sealing ring 643 is placed in the inner cavity of the limiting groove 9. The second feeding pipe 635 and the connecting pipe 645 are slidably connected. The operation in the conventional detection process is complicated. The distilled water is weighed in turn to ensure that the amount of distilled water injected is consistent. The breathable cup 641 and the PET film sheet 642 are sealed at a single time. When multiple films are inspected, they need to be reinforced one by one. When filling distilled water, each time water is added, it is easily affected by environmental factors such as temperature and humidity. At the same time, the traditional method of filling distilled water is prone to leakage, which affects the actual amount added, reduces the accuracy of the detection, and takes longer time for the detection. When filling distilled water, the second feeding pipe 635 is driven to be inserted into the connecting pipe as the second feeding pipe 635 moves downward. The inner cavity of the connecting tube 645 causes the second feeding tube 635 to squeeze the sealing sheet 649. At this time, the sealing sheet 649 slides on the first fixing rod 646, and the second spring 648 is compressed to make the sealing sheet 649 close to the side of the fixing plate 647. The distilled water in the inner cavity of the second feeding tube 635 can flow into the inner cavity of the moisture permeable cup 641 from the water outlet 638. When the second feeding tube 635 is separated from the inner cavity of the connecting tube 645, the elastic force of the second spring 648 makes the sealing sheet 649 contact the top wall of the moisture permeable cup 641. At this time, the moisture permeable cup 641 is in a closed state again. In this process, the PET film sheet 642 is attached to the moisture permeable cup 641, and the moisture permeable cup 641 and the PET film sheet 642 are sealed by the sealing ring 643, and then the fastening bolt 64 4. Tighten the sealing ring 643 and the moisture permeable cup 641, seal the membrane detection mechanism 64 as a whole and place it in the inner cavity of the limit groove 9, record the weight or humidity data at the beginning and end of the test, the weight includes the total weight of the membrane detection mechanism 64 and the distilled water, calculate the water vapor permeability or other relevant indicators of the PET film according to the test data, and quickly inject distilled water into the membrane detection mechanism 64 through the filtering mechanism 61, the adjusting mechanism 62 and the feeding mechanism 63. In this application, the membrane detection mechanism 64 is first sealed and placed on the support table 5, the distilled water is filtered by the filtering mechanism 61, the adjusting mechanism 62 adjusts the injection amount of the distilled water, and the feeding mechanism 63 is filled with distilled water, and the distilled water does not contact with the outside air during the filling process.Directly adding the constant temperature into the inner cavity of the thermostat 1 ensures the uniformity of the ambient temperature and humidity, improves the accuracy of the detection effect, and improves the detection efficiency.

[0043] See also Figure 3 and Fig.12 As shown, the alarm assembly 7 includes a first fixed plate 71, the first fixed plate 71 is fixedly connected to the inner wall of the constant temperature box 1, the outer surface of the first fixed plate 71 is provided with a horizontal detection mechanism 72, and the outer surface of the first fixed plate 71 is fixedly installed with an alarm mechanism 73. The horizontal detection mechanism 72 is used to detect whether the first fixed plate 71 is vertical, that is, whether the equipment is stable, and the alarm mechanism 73 is used to detect whether the support table 5 is horizontal, that is, whether the membrane detection mechanism 64 placed on the support table 5 is horizontal, to ensure that the membrane detection mechanism 64 is in a horizontal state during detection.

[0044] See also Fig.12 and Fig.13 As shown, the horizontal detection mechanism 72 includes a fixing frame 721, the fixing frame 721 is fixedly connected to the first fixing plate 71, the upper surface of the fixing frame 721 is provided with a first groove 722, the inner cavity of the first groove 722 is provided with a rolling rod 723, the outer surface of the rolling rod 723 is provided with a detection block 724, the rolling rod 723 and the detection block 724 are rotatably connected, the bottom end of the rolling rod 723 is in contact with the inner wall of the first groove 722, a pointer 725 is fixedly installed in the middle part of the detection block 724, and a counterweight block 726 is fixedly connected to the middle part of the bottom end of the detection block 724, and the gravity of the counterweight block 726 ensures that the fixing frame 721 is in When horizontal, the detection block 724 is located in the middle of the fixing frame 721, the pointer 725 points to the middle of the fixing frame 721, and the first groove 722 is symmetrically distributed about the middle of the fixing frame 721. When the first fixing plate 71 is tilted, the fixing frame 721 is driven to tilt, and the tilt of the fixing frame 721 drives the rolling rod 723 in the inner cavity of the first groove 722 to roll. The movement of the rolling rod 723 drives the position of the detection block 724 on the fixing frame 721 to change, so that the pointing position of the pointer 725 changes, so that the overall stability of the equipment can be judged by the direction of the pointer 725, thereby ensuring the stability of the equipment during detection.

[0045] See also Fig.12 and Fig.14As shown, the alarm mechanism 73 includes a second fixing rod 731, one end of the second fixing rod 731 is fixedly connected to the first fixing plate 71, the other end of the second fixing rod 731 is fixedly connected to a second fixing block 732, a second fixing plate 733 is fixedly installed at the middle part of the second fixing block 732, a second connecting rod 734 is fixedly installed on the outer surface of the second fixing plate 733, a third spring 735 is slidably connected to the outer surface of the second connecting rod 734, an alarm 736 is provided on the outer surface of the second fixing plate 733, a button 737 is provided on the outer surface of the second fixing plate 733, a pressure block 738 is slidably connected to the outer surface of the second connecting rod 734, the third spring 735 is located between the pressure block 738 and the second fixing plate 733, there are two pressure blocks 738, and they are symmetrically distributed about the second fixing plate 733, the alarm 736 is electrically connected to the button 737, pressing the button 737 controls the alarm 736 to sound an alarm, and the button 737 and the pressure block 738 are slidably connected. There is a gap between block 738, and the pressure block 738 fits with the inner cavity of the second groove 8. When the first fixed plate 71 is in a vertical position, the support platform 5 tilts during long-term use. At this time, the rotation of the support platform 5 drives the second groove 8 to contact the pressure block 738, and squeezes the pressure block 738 to compress the third spring 735. The squeezing of the pressure block 738 drives the pressure block 738 to slide in the inner cavity of the second connecting rod 734. At the same time, the pressure block 738 presses the button 737. The pressing of the button 737 drives the alarm 736 to sound an alarm, reminding the staff to maintain whether the support platform 5 is tilted to ensure the stability of the membrane detection mechanism 64. The tilt of the support platform 5 may cause the contact area or contact mode between the distilled water and the PET film to change, thereby affecting the water permeability. This change may cause the test result to deviate from the true value, resulting in an increase in the test error, so as to quickly discover the problem when the equipment is tilted to ensure the accuracy of the data during the experiment.

[0046] In summary, when conducting the test, the film to be tested is placed in the inner cavity of the thermostatic box 1 and the door 3 is closed. The temperature and humidity in the thermostatic box 1 and other environmental factors are controlled by the control panel 2. After adjustment, an equal amount of water is added through the detection component 6. Relatively pure distilled water is used to implement the inverted cup method for moisture permeability testing. The rotating rod 4 is used to rotate to facilitate continuous loading. The support table 5 is used for support. The alarm component 7 and the second groove 8 are used to detect whether the equipment as a whole remains stable, that is, to ensure that the water in the equipment does not tilt during the test. The filtering mechanism 61 is used to filter the distilled water to reduce the content of impurities. The adjusting mechanism 62 is used to adjust the amount of distilled water added. The feeding mechanism 63 is used for distilled water feeding. The film detection mechanism 64 is used to store distilled water and prevent the film from being tested on the limit groove 9. The horizontal detection mechanism 72 is used to detect whether the first fixed plate 71 is vertical, that is, whether the equipment is stable. The alarm mechanism 73 is used to detect whether the support table 5 is horizontal, that is, whether the film detection mechanism 64 placed on the support table 5 is horizontal, to ensure that the film detection mechanism 64 is in a horizontal state during the test.

[0047] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0048] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A device for detecting the moisture permeability of a PET film, comprising a constant temperature box (1), characterized in that: A control panel (2) is fixedly mounted on the outer surface of the thermostatic box (1); a box door (3) is provided on the outer surface of the thermostatic box (1); a rotating rod (4) is rotatably connected to the inner cavity of the thermostatic box (1); a motor is provided in the inner cavity at the bottom end of the thermostatic box (1); the output end of the motor is sleeved with the bottom end of the rotating rod (4); a support platform (5) is fixedly connected to the top end of the rotating rod (4); a detection component (6) is provided on the outer surface of the thermostatic box (1); an alarm component (7) is fixedly mounted on the inner wall of the thermostatic box (1); a second groove (8) is provided on the outer surface of the support platform (5); and a limit groove (9) is provided on the upper surface of the support platform (5); The detection assembly (6) comprises a filtering mechanism (61), an adjusting mechanism (62) is arranged at the bottom end of the filtering mechanism (61), a feeding mechanism (63) is arranged at the bottom end of the adjusting mechanism (62), a membrane detection mechanism (64) is placed on the upper surface of the support platform (5), the membrane detection mechanism (64) is located above the limiting groove (9), and the membrane detection mechanism (64) and the limiting groove (9) are both provided with four.

2. A PET film moisture permeability detection device as claimed in claim 1, characterized in that: The filtering mechanism (61) comprises a water storage barrel (611), a top cover (612) is arranged at the top of the water storage barrel (611), a water inlet cover (613) is engaged in the inner cavity of the top cover (612), a slide groove (614) is provided in the inner cavity of the water storage barrel (611), a filter screen (615) is slidably connected to the inner cavity of the slide groove (614), a first threaded rod (616) is sleeved in the middle part of the filter screen (615), the first threaded rod (616) and the filter screen (615) are rotatably connected via a thread, the first threaded rod (616) and the water storage barrel (611) are rotatably connected, the first threaded rod (616) and the top cover (612) are rotatably connected, and a water outlet (617) is provided at the bottom end of the water storage barrel (611).

3. A PET film moisture permeability detection device as claimed in claim 2, characterized in that: The regulating mechanism (62) comprises a storage cylinder (621), the inner cavity of the storage cylinder (621) is slidably connected to a telescopic cylinder (622), the bottom end of the telescopic cylinder (622) is fixedly mounted with a chassis (623), the top end of the storage cylinder (621) is fixedly connected to a connecting ring (624), the connecting ring (624) and the bottom end of the water storage bucket (611) are rotatably connected, the bottom end of the connecting ring (624) is fixedly connected to a first connecting pipe (625), the inner cavity of the first connecting pipe (625) is slidably connected to a second connecting pipe (626), the bottom end of the second connecting pipe (626) is fixedly connected to a material discharge ring (627), the material discharge ring (627) and The chassis (623) is rotatably connected, the upper surface of the discharge ring (627) is provided with a lifting mechanism (628), the upper surface of the lifting mechanism (628) is provided with a first connecting frame (629), the first connecting frame (629) is slidably connected with the second connecting tube (626) and the telescopic tube (622), the bottom ends of the storage tube (621) and the first connecting tube (625) are flush, the upper surface of the first connecting frame (629) is fixedly connected with the bottom ends of the first connecting tube (625) and the storage tube (621), the water outlet (617) is located directly above the first connecting tube (625), and the discharge ring (627) and the chassis (623) are rotatably connected.

4. A PET film moisture permeability detection device as claimed in claim 3, characterized in that: The lifting mechanism (628) comprises a first fixed block (6281), the inner cavity of the first fixed block (6281) is rotatably connected to a second threaded rod (6282), the upper surface of the first fixed block (6281) is slidably connected to a slider (6283), the outer surface of the slider (6283) is fixedly installed with a driving rod (6284), the four corners of the first fixed block (6281) are fixedly installed with storage rods (6285), the inner cavity of the storage rod (6285) is slidably connected to a lifting rod (6286), and the lifting rod (6286) is fixedly installed with a lifting rod (6287). 6), a connecting block (6287) is fixedly installed on the upper surface of the connecting block (6287), a driving block (6288) is fixedly installed on the lower surface of the connecting block (6287), a driving groove (6289) is provided on the outer surface of the driving block (6288), the second threaded rod (6282) and the slider (6283) are connected by threaded rotation, the driving rod (6284) and the driving groove (6289) are connected by sliding, the first fixed block (6281) and the discharge ring (627) are fixedly connected, and the connecting block (6287) and the first connecting frame (629) are fixedly connected.

5. A PET film moisture permeability detection device as claimed in claim 3, characterized in that: The feeding mechanism (63) comprises a protrusion (631), a second connecting frame (632) is fixedly mounted on the bottom end of the protrusion (631), a first connecting rod (633) is slidably connected to the inner cavity of the second connecting frame (632), the first connecting rod (633) and the bottom end of the chassis (623) are fixedly connected, a first feeding pipe (634) is fixedly connected to the bottom end of the chassis (623), a second feeding pipe (635) is slidably connected to the inner cavity of the first feeding pipe (634), a connecting strip (636) is slidably connected to the inner cavity of the chassis (623), a pressure rod (637) is rotatably connected to the bottom end of the connecting strip (636), a water outlet (638) is provided at the bottom end of the second feeding pipe (635), and a first spring (634) is sleeved on the outer surface of the first connecting rod (633). 9), the first spring (639) is located between the second connecting frame (632) and the chassis (623), the connecting strip (636) and the feeding ring (627) are fixedly connected, a connecting hole is opened on the outer surface of the chassis (623), the connecting hole is located at the top inner cavity of the first feeding tube (634), the outer surface of the chassis (623) starts a rotating groove, the connecting strip (636) and the rotating groove are slidably connected, the second connecting tube (626) and the connecting hole are sleeved, the two ends of the protrusion (631) are parallel to the middle protrusion, the bottom end of the pressure rod (637) and the two ends of the protrusion (631) are flush, and when the connecting strip (636) rotates in the sliding groove, the pressure rod (637) passes through the protrusion of the protrusion (631), and the chassis (623) and the upper surface inner cavity of the thermostatic box (1) are fixedly connected.

6. A PET film moisture permeability detection device as claimed in claim 5, characterized in that: The membrane detection mechanism (64) comprises a moisture permeable cup (641), the bottom end of the moisture permeable cup (641) is tightly fitted with a PET film sheet (642), the bottom end of the PET film sheet (642) is tightly fitted with a sealing ring (643), the inner cavity of the moisture permeable cup (641) is connected to a fastening bolt (644) by a threaded rotation, a connecting pipe (645) is fixedly installed at the middle part of the top end of the moisture permeable cup (641), and a first fixing rod (646) is fixedly installed on the inner wall of the top end of the moisture permeable cup (641), and the first fixing rod (646) ) is fixedly installed at the bottom end thereof, a second spring (648) is arranged on the upper surface of the fixed disk (647), a sealing sheet (649) is fixedly connected to the top end of the second spring (648), the sealing sheet (649) and the sealing sheet (649) and the first fixed rod (646) are slidably connected, the sealing sheet (649) and the top inner wall of the moisture permeable cup (641) are tightly fitted, the sealing ring (643) is placed in the inner cavity of the limiting groove (9), and the second feeding pipe (635) and the connecting pipe (645) are slidably connected.

7. A PET film moisture permeability detection device as claimed in claim 1, characterized in that: The alarm assembly (7) comprises a first fixing plate (71), the first fixing plate (71) being fixedly connected to the inner wall of the thermostatic box (1), a level detection mechanism (72) being provided on the outer surface of the first fixing plate (71), and an alarm mechanism (73) being fixedly mounted on the outer surface of the first fixing plate (71).

8. A PET film moisture permeability detection device as claimed in claim 7, characterized in that: The horizontal detection mechanism (72) comprises a fixing frame (721), wherein the fixing frame (721) is fixedly connected to the first fixing plate (71), a first groove (722) is provided on the upper surface of the fixing frame (721), a rolling rod (723) is provided in the inner cavity of the first groove (722), a detection block (724) is provided on the outer surface of the rolling rod (723), the rolling rod (723) and the detection block (724) are rotatably connected, the bottom end of the rolling rod (723) contacts the inner wall of the first groove (722), a pointer (725) is fixedly installed in the middle part of the detection block (724), a counterweight block (726) is fixedly connected to the middle part of the bottom end of the detection block (724), the pointer (725) points to the middle part of the fixing frame (721), and the first groove (722) is symmetrically distributed about the middle part of the fixing frame (721).

9. A PET film moisture permeability detection device as claimed in claim 7, characterized in that: The alarm mechanism (73) comprises a second fixed rod (731), one end of which is fixedly connected to the first fixed plate (71), the other end of which is fixedly connected to a second fixed block (732), a second fixed plate (733) is fixedly installed at the middle part of the second fixed block (732), a second connecting rod (734) is fixedly installed on the outer surface of the second fixed plate (733), a third spring (735) is slidably connected to the outer surface of the second connecting rod (734), an alarm (736) is provided on the outer surface of the second fixed plate (733), a button (737) is provided on the outer surface of the second fixed plate (733), and a pressure block (738) is slidably connected to the outer surface of the second connecting rod (734).

10. A PET film moisture permeability detection device as claimed in claim 9, characterized in that: The third spring (735) is located between the pressure block (738) and the second fixed plate (733). There are two pressure blocks (738) and they are symmetrically distributed with respect to the second fixed plate (733). The alarm (736) and the button (737) are electrically connected. Pressing the button (737) controls the alarm (736) to sound an alarm. There is a gap between the button (737) and the pressure block (738). The pressure block (738) fits the inner cavity of the second groove (8).

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