A PVC film airtightness testing device

Abstract

This utility model relates to the field of PVC membrane airtightness testing technology, specifically a PVC membrane airtightness testing device. The device includes a base, with a clamping assembly and a testing assembly mounted on the upper end of the base. The testing assembly includes multiple sets of support columns fixed to the base, with a fixed cylinder fixed to the upper end of each set of support columns. The clamping assembly clamps the PVC membrane and places it onto the upper end of the fixed cylinder. An upper connecting cylinder is inserted into the upper end of the clamping assembly, and a lower connecting cylinder is inserted into the fixed cylinder. The upper and lower connecting cylinders respectively press against the upper and lower ends of the PVC membrane, and are connected. Water is added to the upper connecting cylinder at an appropriate height through a water inlet, while air tank one and the air inlet pipe inflate the lower connecting cylinder. When air tank one is empty and the membrane airtightness is poor, the gas passes through the PVC membrane and enters the water in the upper connecting cylinder, generating bubbles. This increases the air pressure in air tank one. Observing the bubbles allows for the detection of airtightness and the specific location of the airtightness problem.

Description

Technical Field

[0001] This utility model relates to the field of PVC film air tightness testing, specifically a PVC film air tightness testing device. Background Technology

[0002] PVC film is mainly composed of polyvinyl chloride. It is a slightly yellow, semi-transparent film with a glossy appearance. PVC film is widely used in packaging, building waterproofing, medical protection and other fields. Its airtightness directly affects the performance and service life of the product.

[0003] Existing PVC membrane airtightness testing devices often use the differential pressure method, which involves setting up sealing structures on both sides of the membrane, injecting gas, and observing the pressure changes in the sealing structures to determine the airtightness of the PVC membrane. However, this method cannot visually display the specific location of the membrane airtightness difference. Therefore, a new PVC membrane airtightness testing device is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a PVC film airtightness testing device to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A PVC film airtightness testing device includes a base, a clamping component and a testing component are installed on the upper end of the base, the testing component includes multiple sets of pillars fixed to the base, and a fixed cylinder is fixedly connected to the upper end of the multiple sets of pillars. The clamping component is used to clamp the PVC film and sleeve it on the upper end of the fixed cylinder.

[0007] The clamping assembly has an upper connecting cylinder inserted into its upper end, and a lower connecting cylinder inserted into its fixed cylinder. The upper connecting cylinder and the lower connecting cylinder press against the upper and lower ends of the PVC film, respectively, and the upper connecting cylinder and the lower connecting cylinder are connected together. Both the upper connecting cylinder and the lower connecting cylinder are made of transparent material. A locking assembly is snapped between the upper connecting cylinder and the lower connecting cylinder. The upper connecting cylinder is connected to and fixedly connected to an air outlet pipe and a water inlet, and the lower connecting cylinder is connected to and fixedly connected to an air inlet pipe. The ends of the air outlet pipe and the air inlet pipe are connected to air tank two and air tank one, respectively.

[0008] Preferably, the clamping assembly includes a lifting cylinder, which is fixedly connected to the base, and a lifting seat is fixedly connected to the output end of the lifting cylinder.

[0009] Two sets of clamping plates and a set of driving components are slidably installed on one side of the lifting seat. The driving components are used to drive the two sets of clamping plates to slide. Clamping rings are fixed to the ends of the two sets of clamping plates. The two sets of clamping rings are squeezed together to clamp the PVC film.

[0010] Preferably, the drive assembly includes a slider, a slide plate is slidably mounted on one side of the lifting seat, two sets of connecting arms are rotatably mounted on the slide plate, the ends of the two sets of connecting arms are respectively rotatably connected to two sets of clamping plates, and a push-pull cylinder is fixedly connected to one side of the lifting seat, the output end of the push-pull cylinder is fixedly connected to the slider.

[0011] Preferably, the upper and lower connecting cylinders have the same diameter, and the diameters of both the upper and lower connecting cylinders are smaller than the diameter of the fixed cylinder. The diameter of the fixed cylinder is smaller than the diameter of the clamping ring, and the fixed cylinder and the clamping ring are inserted into each other.

[0012] Preferably, a sealing ring is installed at the end where the upper and lower connecting cylinders meet, and the two sets of sealing rings press against both sides of the PVC film respectively.

[0013] Preferably, the locking assembly includes a base plate located below the lower docking cylinder. Connecting columns are fixed to both ends of the base plate. Two sets of connecting columns are located on both sides of the clamping ring, and pressure plates are threaded onto the upper ends of both sets of connecting columns. Both sets of pressure plates press against the upper end of the upper docking cylinder.

[0014] The beneficial effects of this utility model are:

[0015] This invention involves adding water to an appropriate level in the upward-facing docking cylinder through the water inlet, while the air tank and air inlet pipe are used to inflate the downward-facing docking cylinder. Even when the air tank is empty and the membrane has poor air tightness, the gas passes through the PVC membrane and enters the water in the upper docking cylinder, generating bubbles. This simultaneously increases the air pressure inside the air tank. Observing the bubbles can detect the air tightness and the specific location of the air tightness problem. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the clamping component structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the installation of the locking component of this utility model;

[0020] Figure 4 This is a cross-sectional schematic diagram of the clamping ring structure of this utility model;

[0021] Figure 5 yes Figure 4 Enlarged schematic diagram of the structure at point A;

[0022] The attached figures are labeled as follows:

[0023] 1. Base; 2. Lifting cylinder; 3. Lifting seat; 4. Push-pull cylinder; 5. Slider; 6. Clamping plate; 7. Connecting arm; 8. Clamping ring; 9. Support column; 10. Fixing cylinder; 11. Lower connecting cylinder; 12. Upper connecting cylinder; 13. Sealing ring; 14. Air inlet pipe; 15. Air tank one; 16. Air outlet pipe; 17. Air tank two; 18. Water inlet; 19. Base plate; 20. Connecting column; 21. Pressure plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] A PVC film airtightness testing device, such as Figures 1-5 As shown, the device includes a base 1, with a clamping assembly and a detection assembly mounted on the upper end of the base 1. The detection assembly includes multiple sets of support columns 9 fixed to the base 1, and a fixing cylinder 10 is fixedly connected to the upper end of the multiple sets of support columns 9. The clamping assembly is used to clamp the PVC film and place it on the upper end of the fixing cylinder 10. The multiple sets of support columns 9 support the fixing cylinder 10. The fixing cylinder 10 is hollow inside. The clamping assembly clamps the PVC film. The PVC film may be loose, which may cause the airtightness test to be impossible. Therefore, the clamping assembly is used to clamp the PVC film. Then, the center of the film is aligned with the center of the fixing cylinder 10, and the PVC film is lowered so that the PVC film covers the fixing cylinder 10. The fixing cylinder 10 squeezes the PVC film and flattens it.

[0026] An upper connecting tube 12 is inserted into the upper end of the clamping assembly, and a lower connecting tube 11 is inserted into the fixed tube 10. The upper connecting tube 12 and the lower connecting tube 11 respectively squeeze the upper and lower ends of the PVC film, and the upper connecting tube 12 and the lower connecting tube 11 are connected. The upper connecting tube 12 and the lower connecting tube 11 are both made of transparent material, which makes it easy to observe the situation inside the upper connecting tube 12 and the lower connecting tube 11. A locking component is installed between the upper connecting tube 12 and the lower connecting tube 11 to ensure that the upper connecting tube 12 and the lower connecting tube 11 are tightly connected and will not loosen. The upper connecting tube 12 is connected and fixedly connected to the air outlet pipe 16 and the water outlet 18, and the lower connecting tube 11 is connected and fixedly connected to the air inlet pipe 14. The ends of the air outlet pipe 16 and the air inlet pipe 14 are connected to the second air tank 17 and the first air tank 15, respectively.

[0027] Add water to an appropriate level into the upper docking cylinder 12 from the water inlet 18. Air pressure detectors are installed on both air tank 15 and air tank 17. Air tank 15 and the air inlet pipe 14 are used to inflate the lower docking cylinder 11. If there is no air in air tank 15 and the membrane has poor air tightness, the gas passes through the PVC membrane and enters the water in the upper docking cylinder 12, generating bubbles and increasing the air pressure inside air tank 15. Observing the bubbles through the transparent upper and lower docking cylinders 12 and 11 allows for the detection of air tightness and the specific location of any air tightness issues. If the PVC membrane has good air tightness, the gas in the lower docking cylinder 11 will not pass through the PVC membrane into the upper docking cylinder 12, and no bubbles will be generated.

[0028] The clamping assembly includes a lifting cylinder 2, which is fixedly connected to the base 1. The output end of the lifting cylinder 2 is fixedly connected to a lifting seat 3. Two sets of clamping plates 6 and a set of driving components are slidably installed on one side of the lifting seat 3. The driving components are used to drive the two sets of clamping plates 6 to slide. The ends of the two sets of clamping plates 6 are fixedly connected to clamping rings 8. The two sets of clamping rings 8 are squeezed together to clamp the PVC film.

[0029] The drive assembly includes a slider 5, a sliding plate is slidably mounted on one side of the lifting seat 3, two sets of connecting arms 7 are rotatably mounted on the sliding plate, and the ends of the two sets of connecting arms 7 are rotatably connected to two sets of clamping plates 6 respectively. A push-pull cylinder 4 is fixedly connected to one side of the lifting seat 3, and the output end of the push-pull cylinder 4 is fixedly connected to the slider 5.

[0030] The output end of the push-pull cylinder 4 (model AT91-100-2223) pushes and pulls the slider 5. The slider 5 pushes and pulls the two sets of clamping plates 6 through the two sets of connecting arms 7, so that the two sets of clamping plates 6 move closer or further apart, thereby controlling the two sets of clamping rings 8 to clamp or release the PVC film. When the PVC film is clamped, the output end of the lifting cylinder 2 (model TN10-30) retracts, driving the clamping rings 8 and the PVC film to descend, so that the PVC film covers the fixed cylinder 10.

[0031] The upper connecting cylinder 12 and the lower connecting cylinder 11 have the same diameter, and the diameters of both the upper connecting cylinder 12 and the lower connecting cylinder 11 are smaller than the diameter of the fixed cylinder 10. The diameter of the fixed cylinder 10 is smaller than the diameter of the clamping ring 8. The fixed cylinder 10 and the clamping ring 8 are inserted into each other.

[0032] The fixing cylinder 10 can be inserted into the clamping ring 8, and the upper connecting cylinder 12 and the lower connecting cylinder 11 are connected to the PVC film inside the clamping ring 8.

[0033] A sealing ring 13 is installed at one end of the upper connecting cylinder 12 and the lower connecting cylinder 11 that are connected to each other. The two sets of sealing rings 13 squeeze the two sides of the PVC film respectively.

[0034] The sealing ring 13 increases the sealing between the upper connecting cylinder 12 and the lower connecting cylinder 11 and the PVC membrane.

[0035] The locking assembly includes a base plate 19, which is located below the lower docking cylinder 11. Both ends of the base plate 19 are fixedly connected to connecting posts 20. The two sets of connecting posts 20 are located on both sides of the clamping ring 8, and the upper ends of the two sets of connecting posts 20 are threaded with pressure plates 21. The two sets of pressure plates 21 press against the upper end of the upper docking cylinder 12.

[0036] After the upper connecting cylinder 12 and the lower connecting cylinder 11 are connected, the base plate 19 and the two sets of connecting columns 20 are inserted and installed. Then, the pressure plate 21 is turned so that the pressure plate 21 presses against the upper end of the upper connecting cylinder 12, thereby making the upper connecting cylinder 12 and the lower connecting cylinder 11 tightly connected.

[0037] The working principle of the PVC film airtightness testing device provided by this utility model is as follows:

[0038] A clamping assembly is used to hold the PVC membrane, and then the center of the membrane is aligned with the center of the fixed cylinder 10. The lifting cylinder 2 drives the lifting seat 3 to lower the PVC membrane, so that the PVC membrane covers the fixed cylinder 10. The fixed cylinder 10 squeezes the PVC membrane to flatten it. The upper docking cylinder 12 and the lower docking cylinder 11 are then connected and fixed by a locking assembly. Water of an appropriate height is added to the upper docking cylinder 12 from the water inlet 18. Air pressure detectors are installed on both air tank 15 and air tank 2 17. Air tank 15 and air inlet pipe 14 are used to inflate the lower docking cylinder 11. When there is no air in air tank 15 and the membrane has poor air tightness, the gas passes through the PVC membrane and enters the water in the upper docking cylinder 12, generating bubbles. At the same time, the air pressure in air tank 15 increases. The bubbles are observed through the transparent upper docking cylinder 12 and lower docking cylinder 11, which can detect the air tightness and the specific location of the poor air tightness. If the PVC membrane has good air tightness, the gas in the lower docking cylinder 11 will not pass through the PVC membrane and enter the upper docking cylinder 12, and no bubbles will be generated.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A PVC membrane airtightness testing device, comprising a base (1), characterized in that, The base (1) is equipped with a clamping assembly and a detection assembly. The detection assembly includes multiple sets of support columns (9) fixed to the base (1). The upper ends of the multiple sets of support columns (9) are fixed to a fixed cylinder (10). The clamping assembly is used to clamp the PVC film and put it on the upper end of the fixed cylinder (10). The clamping assembly is fitted with an upper connecting tube (12) at its upper end and a lower connecting tube (11) is fitted inside the fixing tube (10). The upper connecting tube (12) and the lower connecting tube (11) press against the upper and lower ends of the PVC film respectively, and the upper connecting tube (12) and the lower connecting tube (11) are connected together. The upper connecting tube (12) and the lower connecting tube (11) are both made of transparent material. A locking assembly is installed between the upper connecting tube (12) and the lower connecting tube (11). The upper connecting tube (12) is connected to the air outlet (16) and the water inlet (18). The lower connecting tube (11) is connected to the air inlet (14). The ends of the air outlet (16) and the air inlet (14) are connected to the second air tank (17) and the first air tank (15) respectively.

2. The PVC film airtightness testing device according to claim 1, characterized in that, The clamping assembly includes a lifting cylinder (2), which is fixedly connected to the base (1), and the output end of the lifting cylinder (2) is fixedly connected to a lifting seat (3). Two sets of clamping plates (6) and a set of driving components are slidably installed on one side of the lifting seat (3). The driving components are used to drive the two sets of clamping plates (6) to slide. The ends of the two sets of clamping plates (6) are fixed with clamping rings (8). The two sets of clamping rings (8) are squeezed together to hold the PVC film.

3. The PVC film airtightness testing device according to claim 2, characterized in that, The drive assembly includes a slider (5), a sliding plate is slidably mounted on one side of the lifting seat (3), two sets of connecting arms (7) are rotatably mounted on the sliding plate, the ends of the two sets of connecting arms (7) are rotatably connected to two sets of clamps (6) respectively, and a push-pull cylinder (4) is fixedly connected to one side of the lifting seat (3), the output end of the push-pull cylinder (4) is fixedly connected to the slider (5).

4. The PVC film airtightness testing device according to claim 1, characterized in that, The upper connecting cylinder (12) and the lower connecting cylinder (11) have the same diameter, and the diameters of the upper connecting cylinder (12) and the lower connecting cylinder (11) are both smaller than the diameter of the fixed cylinder (10). The diameter of the fixed cylinder (10) is smaller than the diameter of the clamping ring (8). The fixed cylinder (10) and the clamping ring (8) are inserted into each other.

5. The PVC film airtightness testing device according to claim 1, characterized in that, The upper connecting cylinder (12) and the lower connecting cylinder (11) are each fitted with a sealing ring (13) at one end, and the two sets of sealing rings (13) squeeze the two sides of the PVC film respectively.

6. The PVC film airtightness testing device according to claim 1, characterized in that, The locking assembly includes a base plate (19) located below the lower docking cylinder (11). Both ends of the base plate (19) are fixed with connecting posts (20). The two sets of connecting posts (20) are located on both sides of the clamping ring (8), and the upper ends of the two sets of connecting posts (20) are threaded with pressure plates (21). The two sets of pressure plates (21) press against the upper end of the upper docking cylinder (12).

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