A vacuum packaging sealability detection device

Abstract

The utility model relates to vacuum packaging sealing technical field, concretely is a kind of vacuum packaging sealing property detection device, including workbench, the workbench is fixed with gas pipe joint, standard gas tank and differential pressure sensor, the sealing assembly is jointly connected between the end of three gas pipes and the end of four gas pipes, when the vacuum packaging piece to be detected exists big leak, compressed gas will quickly penetrate into vacuum packaging, when the pressure drop amplitude in detection box exceeds preset pressure standard value, then directly determine that the vacuum packaging sealing is unqualified, if vacuum packaging sealing piece exists micro leak, the air pressure in detection box will slowly penetrate into packaging, cause the pressure in detection box to appear subtle but continuous drop, then determine that the packaging exists subtle sealing defect. Compared with the past through standing a certain time again manual visual inspection packaging whether to bubble compared with, efficiency and pass rate are strengthened, reduce misjudgment and ensure that contents are not damp.

Description

Technical Field

[0001] This utility model relates to the field of vacuum packaging sealing technology, specifically a vacuum packaging sealing performance testing device. Background Technology

[0002] Sealing tests for vacuum packaging of food are a key step in ensuring the quality of the food inside the packaging, extending its shelf life, and preventing microbial contamination. Good sealing performance can effectively isolate oxygen and moisture in the air. If vacuum packaging does not meet the standards, the food is prone to moisture absorption, spoilage, and decay. Therefore, in order to ensure the quality of packaged products, sealing tests need to be performed on the products after packaging.

[0003] A Chinese patent with announcement number CN223229155U discloses a food vacuum packaging sealing test device. The device uses a vacuum package to fall onto a conveyor through a feeding frame. Then, a cylinder is activated to move the sealing cover downwards, so that the food vacuum package is located inside the sealing cover. Subsequently, the air pipe connector is activated to extract the air from inside the sealing cover for testing. This enables continuous testing without frequent start-stop operations, thus extending the equipment life and improving testing efficiency.

[0004] In the aforementioned literature, existing vacuum packaging sealing performance testing devices cannot guarantee the sealing effect between the sealing cover and the surface of the conveyor during use, which easily leads to air leakage and affects the accuracy of the test. In addition, existing vacuum packaging sealing performance testing devices have complex structures, which increases costs and reduces maintenance convenience. Furthermore, the application of multiple mechanisms results in high production input costs. Therefore, a vacuum packaging sealing performance testing device is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, and addressing the issues that existing technologies cannot guarantee sealing performance during use, are prone to air leakage, thus affecting the accuracy of testing, and that the use of multiple mechanisms not only leads to high production costs but also inconvenience in maintenance, this utility model proposes a vacuum packaging sealing performance testing device.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The vacuum packaging sealing test device of this utility model includes a workbench, on which a gas pipe connector, a standard gas cylinder and a micro differential pressure sensor are fixed. A first gas pipe is provided between the gas pipe connector and the standard gas cylinder, and a second gas pipe is provided between the standard gas cylinder and the micro differential pressure sensor. A valve is fixed on the first air pipe, a fourth air pipe is fixed on the differential pressure sensor, and a third air pipe is fixed on the second air pipe and on the side of the second air pipe near the standard gas tank. A sealing assembly is provided between the end of the third air pipe and the end of the fourth air pipe, and a valve is fixed on the third air pipe. The standard gas cylinder is equipped with a No. 1 pressure gauge for monitoring its internal pressure, and the sealing assembly is equipped with a No. 2 pressure gauge for monitoring its internal pressure.

[0007] Preferably, the sealing assembly includes a detection box fixed on the workbench and connected between the ends of the No. 4 and No. 3 air pipes, and a support plate fixed on the workbench, and the No. 2 pressure gauge is fixed on the side wall of the detection box.

[0008] Preferably, a threaded sleeve is fixed through the support plate, and a screw threadedly connected to the threaded sleeve is installed through the threaded sleeve. A sealing cover is rotatably connected to the bottom end of the screw, and the sealing cover is sealed in the upper opening of the detection box.

[0009] Preferably, a first sealing ring is fixed to the lower side of the sealing cover, and a second sealing ring is fixed to the edge of the upper opening of the detection box, and the sealing cover is fitted and sealed on the second sealing ring.

[0010] Preferably, two guide rods are slidably disposed through the support plate, and the bottom ends of the two guide rods are fixed to the upper part of the sealing cover, the top ends of the guide rods are fixed to baffles, and the top end of the lead screw is fixed to a turntable.

[0011] Preferably, a gas source triplet is fixed on the first gas pipe and on the side of the first valve directly opposite the gas pipe connector.

[0012] Preferably, a No. 5 air pipe is fixedly connected to the No. 4 air pipe, a No. 4 valve is fixed to the No. 5 air pipe, and a silencer is fixed to the end of the No. 5 air pipe.

[0013] The advantages of this utility model are: 1. This utility model seals the seal between the sealing cap and the testing chamber by pressing the sealing cap downwards, causing the first and second sealing rings to fit together. Compressed gas is pumped into a standard gas cylinder, and the pressure data inside the standard gas cylinder at this time is used as the preset pressure standard value. The compressed gas in the standard gas cylinder is then sent into the sealed testing chamber. When the vacuum package being tested has a large leak, the compressed gas will quickly seep into the vacuum package. If the pressure drop inside the testing chamber exceeds the preset pressure standard value, the vacuum package is directly judged to be unqualified for sealing.

[0014] 2. When this utility model detects micro-leakage, the detection chamber is kept in a sealed and stable state. If there is a micro-leakage in the vacuum packaging seal, the air pressure inside the detection chamber will slowly seep into the packaging, causing a slight but continuous drop in pressure inside the detection chamber. If the recorded value exceeds the preset micro-pressure standard value, it is determined that the packaging has a minor sealing defect.

[0015] 3. The judgment method is simple and fast. Compared with the previous method of letting the packaging stand for a certain period of time and then manually visually inspecting whether bubbles are forming, the efficiency and pass rate are greatly improved, reducing misjudgments and ensuring that the contents will not be damp. 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, the drawings described below are only some embodiments of this utility model. 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 first three-dimensional structure in this embodiment; Figure 2 This is an enlarged schematic diagram of the main structure of the sealing assembly in this embodiment; Figure 3 This is an enlarged schematic diagram of area A in the main structure diagram of the sealing assembly in this embodiment; Figure 4 This is a schematic diagram of the pipeline connection in the first three-dimensional structure diagram of this embodiment.

[0018] In the diagram: 1. Workbench; 2. Air pipe connector; 21. No. 1 air pipe; 22. No. 1 valve; 23. Air source triplet; 3. Standard gas cylinder; 31. No. 2 gas hose; 32. No. 2 valve; 33. No. 1 pressure gauge; 34. No. 3 gas hose; 35. No. 3 valve; 36. Micro differential pressure sensor; 37. No. 4 gas hose; 38. No. 2 pressure gauge; 39. No. 5 gas hose; 310. No. 4 valve; 311. Silencer; 4. Sealing assembly; 41. Detection chamber; 42. Support plate; 43. Guide rod; 44. Sealing cover; 45. Threaded sleeve; 46. Lead screw; 47. Turntable; 48. Baffle; 49. No. 1 sealing ring; 410. No. 2 sealing ring. Detailed Implementation

[0019] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] Please see Figure 1-4 As shown, a vacuum packaging sealing performance testing device includes a workbench 1, on which an air pipe connector 2, a standard gas cylinder 3 and a differential pressure sensor 36 are fixed. A first air pipe 21 is provided between the air pipe connector 2 and the standard gas cylinder 3, and a second air pipe 31 is provided between the standard gas cylinder 3 and the differential pressure sensor 36. A valve 22 is fixed on the first air pipe 21, a fourth air pipe 37 is fixed on the micro differential pressure sensor 36, a third air pipe 34 is fixed on the second air pipe 31 and on the side of the second valve 32 near the standard gas tank 3, the end of the third air pipe 34 and the end of the fourth air pipe 37 are connected by a sealing component 4, and a third valve 35 is fixed on the third air pipe 34; The standard gas cylinder 3 is equipped with a first pressure gauge 33 for monitoring its internal pressure, and the sealing assembly 4 is equipped with a second pressure gauge 38 for monitoring its internal pressure.

[0021] The sealing assembly 4 includes a detection box 41 fixed on the workbench 1 and connected between the ends of the No. 4 air pipe 37 and the No. 3 air pipe 34, and a support plate 42 fixed on the workbench 1, and the No. 2 pressure gauge 38 is fixed on the side wall of the detection box 41.

[0022] A threaded sleeve 45 is fixed through the support plate 42. A screw 46 threadedly connected to the threaded sleeve 45 is provided through the threaded sleeve 45. A sealing cover 44 is rotatably connected to the bottom end of the screw 46, and the sealing cover 44 is sealed in the upper opening of the detection box 41.

[0023] A first sealing ring 49 is fixed to the lower side of the sealing cover 44, and a second sealing ring 410 is fixed to the edge of the upper opening of the detection box 41. The sealing cover 44 is fitted and sealed on the second sealing ring 410.

[0024] Two guide rods 43 are slidably disposed through the support plate 42, and the bottom ends of the two guide rods 43 are fixed to the upper part of the sealing cover 44. The top ends of the guide rods 43 are fixed to baffles 48, and the top end of the lead screw 46 is fixed to a turntable 47.

[0025] An air source triplet 23 is fixed on the first air pipe 21 and on the side of the first valve 22 directly opposite the air pipe connector 2.

[0026] A No. 5 air pipe 39 is fixedly connected to the No. 4 air pipe 37 and communicates with it. A No. 4 valve 310 is fixed on the No. 5 air pipe 39, and a silencer 311 is fixed at the end of the No. 5 air pipe 39.

[0027] During operation, existing vacuum packaging sealing testing devices cannot guarantee a proper seal between the sealing cover and the conveyor surface, leading to air leakage and affecting testing accuracy. Furthermore, existing devices are complex, increasing costs and compromising maintenance. The use of multiple mechanisms also results in high production costs. In this solution, the vacuum packaging to be tested is placed inside the testing chamber 41. Rotating the turntable 47 causes the sealing cover 44 to move downwards under the threaded connection of the lead screw 46 and threaded sleeve 45. The sealing cover 44 then seals the opening at the top of the testing chamber 41. As the sealing cover 44 is pressed downwards, the first sealing ring 49 and the second sealing ring 410 come into contact, sealing the cover 44 and the testing chamber 41. External compressed air is then connected to the air pipe connector 2 via a pipe, pumping compressed gas into the standard air tank 3 through the first air pipe 21, increasing its internal pressure. Simultaneously, the pressure gauge 33 is used to monitor the pressure in the standard air tank 3. The pressure inside is recorded, then valve 22 is closed, and the monitoring data of the pressure inside standard gas tank 3 is transmitted to the terminal device. The pressure data inside standard gas tank 3 at this time is used as the preset pressure standard value. Then valve 35 is opened to send the compressed gas in standard gas tank 3 into the closed detection chamber 41. After the pressure in standard gas tank 3 is balanced, valve 35 is closed, and pressure gauge 38 will monitor the pressure change inside detection chamber 41 in real time. At this time, if there is a large leak in the vacuum package being tested, the compressed gas will quickly seep into the vacuum package, which will cause the pressure change inside detection chamber 41 to drop significantly in a short time. When the pressure drop inside detection chamber 41 exceeds the preset pressure standard value, the vacuum package is directly judged to be unqualified for sealing, thus realizing the function of large leak detection of vacuum package. After the large leak detection, there is no need to perform micro leak detection. In addition, when the pressure change inside detection chamber 41 does not exceed the preset pressure value range, the package is judged to have no large leak defect, and then enters the micro leak detection stage. During micro-leakage detection, valves 22 and 32 are opened to inject air into the detection chamber 41 to amplify the pressure change caused by the micro-leakage. When the pressure reaches the preset micro-pressure standard value, valves 22 and 32 are closed to keep the detection chamber 41 in a sealed and stable state. If there is a micro-leakage in the vacuum packaging seal, the air pressure in the detection chamber 41 will slowly penetrate into the packaging, causing a slight but continuous decrease in pressure in the detection chamber 41. The pressure change in the detection chamber 41 is recorded by the differential pressure sensor 36. If the recorded value exceeds the preset micro-pressure standard value, it is determined that the packaging has a minor sealing defect. If the micro-pressure difference change is within the preset micro-pressure standard value range during the detection process, the packaging is qualified. During the testing process, the gas pumped into the No. 1 air pipe 21 through the air pipe connector 2 will be processed by the air source triple unit 23 to remove impurities in the air, balance pressure fluctuations, and address issues such as lack of lubrication, so as to avoid impurities clogging the packaging defect opening and prevent air from smoothly entering the packaging, thereby improving the accuracy of the test. After the test is completed, all valves are opened, and due to the opening of valve 4 310, all the compressed gas in the pipeline is discharged from pipe 5 39. After the compressed gas is discharged, the next vacuum package is tested in the same order. When the compressed gas is discharged from pipe 5 39, the exhaust noise is reduced by the action of silencer 311 to protect the working environment. It achieves the function of vacuum packaging seal detection, and has a better sealing effect than traditional vacuum packaging seal detection devices. It also has a simpler structure, which reduces production input costs, effectively reduces costs, and makes maintenance more convenient.

[0028] 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 vacuum packaging sealing performance testing device, characterized in that: Includes a workbench (1), on which a tracheal connector (2), a standard gas cylinder (3) and a differential pressure sensor (36) are fixed. A first tracheal tube (21) is connected between the tracheal connector (2) and the standard gas cylinder (3), and a second tracheal tube (31) is connected between the standard gas cylinder (3) and the differential pressure sensor (36). A valve (22) is fixed on the first air pipe (21), a fourth air pipe (37) is fixed on the micro differential pressure sensor (36), a third air pipe (34) is fixed on the second air pipe (31) and on the side of the second valve (32) near the standard gas tank (3), a sealing assembly (4) is provided between the end of the third air pipe (34) and the end of the fourth air pipe (37), and a third valve (35) is fixed on the third air pipe (34). The standard gas cylinder (3) is fixed with a first pressure gauge (33) for monitoring its internal pressure, and the sealing assembly (4) is equipped with a second pressure gauge (38) for monitoring its internal pressure.

2. The vacuum packaging sealing performance testing device according to claim 1, characterized in that: The sealing assembly (4) includes a detection box (41) fixed on the workbench (1) and connected between the ends of the No. 4 air pipe (37) and the No. 3 air pipe (34) and a support plate (42) fixed on the workbench (1), and the No. 2 pressure gauge (38) is fixed on the side wall of the detection box (41).

3. The vacuum packaging sealing performance testing device according to claim 2, characterized in that: A threaded sleeve (45) is fixed through the support plate (42). A screw (46) is threadedly connected to the threaded sleeve (45). A sealing cover (44) is rotatably connected to the bottom end of the screw (46), and the sealing cover (44) is sealed in the upper opening of the detection box (41).

4. The vacuum packaging sealing performance testing device according to claim 3, characterized in that: A first sealing ring (49) is fixed to the lower side of the sealing cover (44), and a second sealing ring (410) is fixed to the upper opening edge of the detection box (41). The sealing cover (44) is attached to and sealed on the second sealing ring (410).

5. The vacuum packaging sealing performance testing device according to claim 3, characterized in that: Two guide rods (43) are slidably disposed on the support plate (42), and the bottom ends of the two guide rods (43) are fixed to the upper part of the sealing cover (44). The top ends of the guide rods (43) are fixed to baffles (48), and the top end of the lead screw (46) is fixed to a turntable (47).

6. The vacuum packaging sealing performance testing device according to claim 1, characterized in that: A gas source triplet (23) is fixed on the first gas pipe (21) and on the side of the first valve (22) directly opposite the gas pipe connector (2).

7. The vacuum packaging sealing performance testing device according to claim 1, characterized in that: A No. 5 air pipe (39) is fixedly connected to the No. 4 air pipe (37), and a No. 4 valve (310) is fixed on the No. 5 air pipe (39). A silencer (311) is fixed at the end of the No. 5 air pipe (39).

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