Detection equipment for detecting sealing performance of package

Abstract

The utility model relates to the technical field of package leakproofness detection, and discloses a detection device for detecting package leakproofness, which comprises a lower tank body, an upper tank body and a vacuum pump, the lower tank body is connected with the upper tank body through a middle partition plate, the side wall of the lower tank body is provided with a lower pressure release valve and a lower tank negative pressure meter and is connected with the vacuum pump, and the lower tank negative pressure meter is connected with the vacuum pump. A vacuum valve is arranged between the vacuum pump and the lower tank body, an upper tank negative pressure meter is arranged on the side wall of the upper tank body, a sealing cover is arranged at the top end of the upper tank body, and the middle partition plate is provided with an up-down communicating valve. According to the utility model, the pressure rise caused by gradual expansion of the packaging bag in a negative pressure environment and the pressure rise caused by air leakage can be distinguished, and the problem that micro air leakage is difficult to find can be solved, so that the reliability and the convenience of detection are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of package sealing detection, in particular to a detection device for detecting package sealing. Background Art

[0002] Product packaging sealability refers to the ability of packaging to prevent contact between internal contents and the external environment, such as moisture, oxygen, and bacteria. It is a key indicator for ensuring product quality and safety. Good sealing performance effectively prevents external factors such as oxygen, moisture, and microorganisms from entering the package, thereby extending the product's shelf life. Furthermore, well-sealed packaging ensures that the product's taste, color, aroma, and nutritional value remain unchanged, improving consumer satisfaction.

[0003] Depending on the packaging material, packaging sealing methods include pressure bonding, hot melt bonding, and colloid bonding. Each sealing method has its own advantages and disadvantages. Furthermore, the sealing process and stability of the equipment also affect the sealing performance of the package. Common methods for testing the sealing performance of product packaging include bubble generation, negative pressure testing, and tracer liquid testing. However, the bubble method requires submerging the package underwater to detect bubbles to determine if there is a leak. The negative pressure method also creates a negative pressure environment inside the package to observe whether gas or water seeps into the package to determine the sealing performance. This method is suitable for testing the sealing performance of vacuum packaging. The tracer liquid method injects a tracer liquid into the package and then observes whether it seeps out to determine the sealing performance. This method is particularly suitable for testing the sealing performance of liquid packaging. Each method has its limitations. Furthermore, it is not suitable for testing products that are not suitable for contact with water and for packaging bags under normal pressure. Existing testing methods have certain difficulties in detecting packaging with pinhole leaks or slow leaks. Being able to quickly and easily test the airtightness of products during processing plays a key role in the maintenance and commissioning of processing equipment, and can also reduce unnecessary waste and the output of defective products.

[0004] Therefore, it is necessary to provide a detection device for detecting the sealing of packaging to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a testing device for testing the sealing property of a package, which adopts a negative pressure vacuum environment to quickly and effectively test the sealing property of a product package.

[0006] The above technical purpose of the present utility model is implemented through the following technical solutions: a detection device for detecting the sealing of packaging, comprising a lower tank body, an upper tank body and a vacuum pump, the lower tank body and the upper tank body are connected by a middle partition, the side wall of the lower tank body is provided with a lower pressure relief valve and a lower tank negative pressure gauge, and is connected to the vacuum pump, a vacuum valve is provided between the vacuum pump and the lower tank body, the side wall of the upper tank body is provided with an upper tank negative pressure gauge, the top is provided with a sealing cover, and the middle partition is provided with upper and lower connecting valves.

[0007] By adopting the above technical solution, when it is necessary to test the tightness of the tank body, open the upper and lower connecting valves, cover the sealing cover tightly, open the vacuum valve, and start the vacuum pump. When the lower tank negative pressure gauge is -0.1MPa, first close the vacuum valve, then turn off the vacuum pump, and then open the upper and lower connecting valves. If the values ​​of the tank negative pressure gauge and the lower tank negative pressure gauge remain unchanged, the tank body sealing test is completed. When it is necessary to test the sealing of the product packaging, put the product into the upper tank, cover the sealing cover tightly, open the upper and lower connecting valves and the vacuum valve, and start the vacuum pump. When the lower tank negative pressure gauge is -0.1MPa, close the vacuum valve and then turn off the vacuum pump. After the values ​​of the tank negative pressure gauge and the lower tank negative pressure gauge are stable, close the upper and lower connecting valves. If the values ​​indicated by the upper tank negative pressure gauge and the lower tank negative pressure gauge are consistent, it means that the product packaging is sealed and there is no leakage. If the pressure on the upper tank negative pressure gauge is greater than that on the lower tank negative pressure gauge, it means that there is a leakage problem in the product packaging seal. The measurement of the two tank pressure values ​​can distinguish between the pressure increase caused by the gradual expansion of the packaging bag in a negative pressure environment and the pressure increase caused by leakage, thereby improving the reliability and convenience of the detection.

[0008] The utility model is further configured as follows: an upper pressure relief valve is installed on the side wall of the upper tank body.

[0009] By adopting the above technical solution, when the negative pressure of the upper tank body needs to be increased to atmospheric pressure, the upper pressure relief valve is opened, which makes it easier to open the sealing cover, thereby increasing the practical performance of the equipment.

[0010] The present invention is further configured as follows: a lower pressure relief valve is installed on the side wall of the lower tank body.

[0011] By adopting the above technical solution, when the negative pressure in the lower tank needs to be raised to atmospheric pressure, the upper pressure relief valve is opened, which can avoid gas being sucked into the vacuum pump when the vacuum valve is opened, thereby increasing the safety performance of the equipment.

[0012] The present invention is further configured as follows: a sealing ring is fixedly installed between the sealing cover and the upper tank body.

[0013] By adopting the above technical solution, the sealing ring can improve the performance of the device and prevent air leakage.

[0014] To sum up, the utility model has the following effects: when the utility model needs to detect the sealing of product packaging, the product is placed in the upper body tank, the sealing cover is tightly closed, the upper pressure relief valve and the lower pressure relief valve are closed, the upper and lower connecting valves and the vacuum valve are opened, and the vacuum pump is turned on. When the negative pressure gauge of the lower tank is -0.1MPa, the vacuum valve is closed and then the vacuum pump is turned off. After the values ​​of the tank negative pressure gauge and the lower tank negative pressure gauge are stable, the upper and lower connecting valves are closed. If the values ​​indicated by the upper tank negative pressure gauge and the lower tank negative pressure gauge are consistent, it means that the product packaging is sealed and there is no leakage. If the pressure of the upper tank negative pressure gauge is greater than that of the lower tank negative pressure gauge, it means that there is an air leakage problem in the product packaging seal. The measurement of the two tank pressure values ​​can distinguish between the pressure increase caused by the gradual expansion of the packaging bag in a negative pressure environment and the pressure increase caused by leakage, as well as the problem that micro-leaks are difficult to detect, thereby improving the reliability and convenience of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] In the figure: 1. Lower tank body; 2. Upper tank body; 3. Middle partition; 4. Sealing cover; 5. Sealing ring; 6. Upper tank negative pressure gauge; 7. Lower tank negative pressure gauge; 8. Upper pressure relief valve; 9. Lower pressure relief valve; 10. Upper and lower connecting valves; 11. Vacuum valve; 12. Vacuum pump. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0018] See Figure 1, In the embodiment of the present invention, a testing device for testing the sealing of packaging includes a lower tank body 1, an upper tank body 2 and a vacuum pump 12, the lower tank body 1 and the upper tank body 2 are connected by a middle partition 3, the side wall of the lower tank body 1 is provided with a lower pressure relief valve 9 and a lower tank negative pressure gauge 7, and is connected to the vacuum pump 12, a vacuum valve 11 is provided between the vacuum pump 12 and the lower tank body 1, the side wall of the upper tank body 2 is provided with an upper tank negative pressure gauge 6, a sealing cover 4 is provided on the top, and the middle partition 3 is provided with an upper and lower connecting valve 10; when it is necessary to test the sealing of the tank body, open the upper and lower connecting valves 10, cover the sealing cover 4, open the vacuum valve 11, and start the vacuum pump 12. When the lower tank negative pressure gauge 7 is -0.1MPa, first close the vacuum valve 11, then close the vacuum pump 12, and then open the upper and lower connecting valves 10, the tank negative pressure gauge 6 and If the value of the lower tank negative pressure gauge 7 remains unchanged, the tank sealing test is completed; when testing the product packaging sealing, place the product in the upper tank 2, cover the sealing cover 4, open the upper and lower connecting valves 10 and the vacuum valve 11, and start the vacuum pump 12. When the lower tank negative pressure gauge 7 is -0.1MPa, close the vacuum valve 11 and then turn off the vacuum pump 12. After the values ​​of the tank negative pressure gauge 6 and the lower tank negative pressure gauge 7 are stable, close the upper and lower connecting valves 10. If the readings of the upper tank negative pressure gauge 6 and the lower tank negative pressure gauge 7 are consistent, it means that the product packaging is sealed and there is no leakage. If the pressure of the upper tank negative pressure gauge 6 is greater than that of the lower tank negative pressure gauge 7, it means that there is an air leakage problem in the product packaging seal. The measurement of the two tank pressure values ​​can distinguish between the pressure increase caused by the gradual expansion of the packaging bag in a negative pressure environment and the pressure increase caused by leakage, thereby improving the reliability and convenience of the detection.

[0019] In this embodiment, preferably, an upper pressure relief valve 8 is installed on the side wall of the upper tank body 2. When the negative pressure of the upper tank body 2 needs to be increased to atmospheric pressure, the upper pressure relief valve 8 is opened to facilitate opening the sealing cover 4, thereby increasing the practical performance of the device.

[0020] In this embodiment, preferably, a lower pressure relief valve 9 is installed on the side wall of the lower tank body 1. When the negative pressure of the lower tank body 1 needs to be increased to atmospheric pressure, the upper pressure relief valve 9 is opened to avoid gas being sucked into the vacuum pump when the vacuum valve 11 is opened, thereby increasing the safety performance of the equipment.

[0021] In this embodiment, preferably, a sealing ring 5 is fixedly installed between the sealing cover 4 and the upper tank body 2. The sealing ring 5 can improve the performance of the device and prevent air leakage.

[0022] Working principle: When it is necessary to test the sealing of product packaging, put the product into the upper tank 2, cover the sealing cover 4, close the upper pressure relief valve 8 and the lower pressure relief valve 9, open the upper and lower connecting valves 10 and the vacuum valve 11, and start the vacuum pump 12. When the lower tank negative pressure gauge 7 is -0.1MPa, close the vacuum valve 11 and then turn off the vacuum pump 12. After the values ​​of the tank negative pressure gauge 6 and the lower tank negative pressure gauge 7 are stable, close the upper and lower connecting valves 10. If the readings of the upper tank negative pressure gauge 6 and the lower tank negative pressure gauge 7 are consistent, it means that the product packaging is sealed and there is no leakage. If the pressure of the upper tank negative pressure gauge 6 is greater than that of the lower tank negative pressure gauge 7, it means that there is an air leakage problem in the product packaging seal. The measurement of the two tank pressure values ​​can distinguish between the pressure increase caused by the gradual expansion of the packaging bag in a negative pressure environment and the pressure increase caused by leakage, as well as the problem that micro leakage is difficult to detect, thereby improving the reliability and convenience of detection.

[0023] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. A testing device for testing the sealing performance of a package, comprising a lower tank body (1), an upper tank body (2) and a vacuum pump (12), characterized in that: The lower tank body (1) and the upper tank body (2) are connected by a middle partition (3); the side wall of the lower tank body (1) is provided with a lower pressure relief valve (9) and a lower tank negative pressure gauge (7), and is connected to a vacuum pump (12); a vacuum valve (11) is provided between the vacuum pump (12) and the lower tank body (1); the side wall of the upper tank body (2) is provided with an upper tank negative pressure gauge (6), and the top end is provided with a sealing cover (4); and the middle partition (3) is provided with an upper and lower connecting valve (10).

2. The packaging sealing detection device according to claim 1, characterized in that: An upper pressure relief valve (8) is installed on the side wall of the upper tank body (2).

3. The packaging sealing detection device according to claim 1, characterized in that: A lower pressure relief valve (9) is installed on the side wall of the lower tank body (1).

4. The packaging sealing detection device according to claim 1, characterized in that: A sealing ring (5) is fixedly installed between the sealing cover (4) and the upper tank body (2).

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