Isobaric method oxygen permeability tester

Abstract

The utility model belongs to the field of instruments and meters, and relates to an isobaric oxygen permeability tester which comprises a base, an oxygen storage device arranged on the upper portion of the base, a first pressure reducing valve arranged on one side of the oxygen storage device, a first mass flow controller arranged on one side of the first pressure reducing valve and connected with an electrical control system. The upper portion of the electrical control system is provided with a test cavity, the electrical control system is connected with a second electromagnetic valve, the second electromagnetic valve is connected with a gas processor, one side of the oxygen storage device is provided with a nitrogen storage device, one side of the nitrogen storage device is provided with a second pressure reducing valve, and one side of the second pressure reducing valve is provided with a second mass flow controller. And the mass flow controller II is connected with the electrical control system. The tester is complete in structure and complete in function, opening and closing of the electromagnetic valve, flow recording and test result calculation are controlled through the electrical control system, the safety performance is enhanced, and the automation degree of the tester is improved.

Description

Technical Field

[0001] The utility model belongs to the field of instruments and meters, and particularly relates to an isobaric oxygen permeability tester. Background Technique

[0002] The isobaric oxygen permeability tester is a device specifically used to measure the oxygen permeability performance of materials. Its working principle is based on the gas diffusion law and the law of pressure difference driving the permeating substance. During the test, the sample to be tested is clamped between the upper and lower parts of the test chamber. Generally, pure oxygen is used as the test gas, and different gas pressures are maintained in the test chamber to generate a pressure difference across the sample. This test instrument is applicable to various applications that require evaluating the oxygen barrier ability of materials, such as food packaging, medical supplies, cosmetic packaging, etc. Through accurate data collection and analysis, the isobaric oxygen permeability tester provides reliable results to support the decision-making of material selection and product design.

[0003] From the perspective of long-term use, there is generally a defect in the existing oxygen permeability testers, that is, the degree of automation of the instrument is relatively low, and most processes require manual operation, so the efficiency is relatively low and the error rate is relatively high, often failing to reach the detection speed required in the market. Content of the Utility Model

[0004] The purpose of the utility model is to provide an isobaric oxygen permeability tester, which can automatically control the opening and closing of the solenoid valve, and record the size of the flow rate and the test result in real time. During the whole test cycle, it improves the degree of automation and test consistency of the test chamber, and reduces the inaccuracy of the test result caused by improper manual operation.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is that the utility model provides an isobaric oxygen permeability tester, including a base. An oxygen storage is arranged on the upper part of the base. A first pressure reducing valve is arranged on one side of the oxygen storage. A first mass flow controller is arranged on one side of the first pressure reducing valve. The first mass flow controller is connected to an electrical control system. A test chamber is arranged on the upper part of the electrical control system. The electrical control system is connected to a second solenoid valve. The second solenoid valve is connected to a gas processor. A nitrogen storage is arranged on one side of the oxygen storage. A second pressure reducing valve is arranged on one side of the nitrogen storage. A second mass flow controller is arranged on one side of the second pressure reducing valve. The second mass flow controller is connected to the electrical control system.

[0006] Preferably, an operation and experiment interface is arranged on one side of the electrical control system.

[0007] Preferably, a locking mechanism is arranged on the test chamber.

[0008] Preferably, the first pressure reducing valve is connected to a first pressure sensor, and the second pressure reducing valve is connected to a second pressure sensor.

[0009] Preferably, a first electromagnetic valve is connected to the first pressure reducing valve, and a third electromagnetic valve is connected to the second pressure reducing valve, and the first electromagnetic valve and the third electromagnetic valve are connected.

[0010] Preferably, an electromagnetic valve four is connected to the electric control system, an oxygen sensor is connected to the electromagnetic valve four, an electromagnetic valve five is arranged on one side of the oxygen sensor, and a gas processor is connected to the electromagnetic valve five.

[0011] Preferably, the test chamber is divided into upper and lower parts, and a sample is placed in the middle of the test chamber.

[0012] Compared with the prior art, the advantages and positive effects of the present utility model are that

[0013] The structure of the present utility model is complete, the functions are perfect, and the degree of automation is relatively high. It can automatically control the opening and closing of the electromagnetic valves, providing guarantee for normal operation;

[0014] The present utility model can ensure that when the tester is working, the size of the flow rate and the test results can be recorded in real time, which is more convenient than the previous manual recording and can better analyze the data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 FIG. 1 is a schematic three-dimensional structure diagram of an isobaric oxygen permeability tester provided for Embodiment 1;

[0017] Figure 2 FIG. 2 is a top view of an isobaric oxygen permeability tester provided for Embodiment 1;

[0018] In the above figures, 1. base, 2. oxygen storage, 3. first pressure reducing valve, 4. first mass flow controller, 5. electric control system, 6. test chamber, 7. second electromagnetic valve, 8. gas processor, 9. nitrogen storage, 10. second pressure reducing valve, 11. second mass flow controller, 12. operation experiment interface, 13. locking mechanism, 14. first pressure sensor, 15. second pressure sensor, 16. first electromagnetic valve, 17. third electromagnetic valve, 18. fourth electromagnetic valve, 19. oxygen sensor, 20. fifth electromagnetic valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To better understand the above-mentioned objects, features, and advantages of the present utility model, the following further describes the present utility model in conjunction with the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0020] In the following description, many specific details are set forth to facilitate a thorough understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0021] Embodiment 1, as Figure 1 shown, an isobaric oxygen permeability tester includes a base 1. An oxygen storage 2 is provided on the upper part of the base 1. A first pressure reducing valve 3 is provided on one side of the oxygen storage 2. A first mass flow controller 4 is provided on one side of the first pressure reducing valve 3. The first mass flow controller 4 is connected to an electrical control system 5. A test chamber 6 is provided on the upper part of the electrical control system 5. A locking mechanism 13 is provided on the upper part of the test chamber 6. An operation experiment interface 12 is provided on one side of the electrical control system 5. The electrical control system 5 is connected to a second solenoid valve 7. The second solenoid valve 7 is connected to a gas processor 8. A nitrogen storage 9 is provided on one side of the oxygen storage 2. A second pressure reducing valve 10 is provided on one side of the nitrogen storage 9. A second mass flow controller 11 is provided on one side of the second pressure reducing valve 10. The second mass flow controller 11 is connected to the electrical control system 5.

[0022] An oxygen storage 2 is provided on the upper part of the base 1. A first pressure sensor 14 is provided on one side of the oxygen storage 2. During system operation, the first pressure sensor 14 can help regulate and control the gas flow rate by monitoring and feedback the gas pressure in the test chamber 6 in real time. Then the gas enters the first pressure reducing valve 3 to ensure that the gas pressure difference on both sides remains stable, increasing safety. A first solenoid valve 16 is provided on one side of the first pressure reducing valve 3. The first solenoid valve 16 can control the entry and exit of gas, especially control the gas flow into the upper part of the test chamber 6. By the open / closed state of the first solenoid valve 16, the gas pressure in the upper part of the test chamber 6 can be adjusted. A first mass flow controller 4 is provided on one side of the first solenoid valve 16. The first solenoid valve 16 and the first mass flow controller 4 can effectively ensure that the gas flow during the test meets the preset test conditions.

[0023] On one side of the oxygen storage 2, there is a nitrogen storage 19. Nitrogen is an inert gas that will not chemically react with the test sample and will not affect the oxygen permeability test. Nitrogen is usually very dry, so it can help reduce or eliminate moisture in the air and avoid interference of moisture with the test results. On one side of the nitrogen storage 9, there is a pressure sensor II 15. On one side of the pressure sensor II 15, there is a pressure reducing valve II 10. The pressure reducing valve II 10 is connected to a solenoid valve III 17. The solenoid valve III 17 is connected to the solenoid valve I 16, which can ensure the stability of the pressure in the upper and lower parts of the test chamber 6 and prevent inaccurate test results caused by unstable pressure.

[0024] A locking mechanism 13 is provided on the test chamber 6. After the test sample is placed in the test chamber 6, the inside of the test chamber 6 can be sealed by turning the locking mechanism 13, thus ensuring the accuracy of the test results. The lower part of the test chamber 6 is provided with an electrical control system 5. The electrical control system 5 is the total console of the system. On one side of the electrical control system 5, there is an operation experiment interface 12. The operation experiment interface 12 can record the test results inside the test chamber 6 in real time and perform analysis.

[0025] As Figure 2 shown, on one side of the electrical control system 5, there is a solenoid valve II 7. On one side of the solenoid valve II 7, there is a gas processor 8, which can collect and filter the discharged gas and then discharge it. On one side of the solenoid valve II 7, there is a solenoid valve IV 18. The solenoid valve IV 18 is connected to an oxygen sensor 19. The lower part of the test chamber 6 transmits the oxygen and nitrogen passing through the specimen to the oxygen sensor 19. The oxygen sensor 19 calculates the oxygen permeability and permeation amount by recording the passing flow rate and time, so as to obtain the test results. On one side of the oxygen sensor 19, there is a solenoid valve V 20. The solenoid valve V 20 is connected to the gas processor 8 to discharge the gas.

[0026] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0027] The above are only the preferred embodiments of the present invention, and are not limitations to the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. An isobaric oxygen permeability tester comprises a base, an oxygen storage device is arranged on the upper part of the base, a pressure reducing valve 1 is arranged on one side of the oxygen storage device, a mass flow controller 1 is arranged on one side of the pressure reducing valve 1, the mass flow controller 1 is connected to an electrical control system, a test chamber is arranged on the upper part of the electrical control system, the electrical control system is connected to a solenoid valve 2, the solenoid valve 2 is connected to a gas processor, a nitrogen storage device is arranged on one side of the oxygen storage device, a pressure reducing valve 2 is arranged on one side of the nitrogen storage device, a mass flow controller 2 is arranged on one side of the pressure reducing valve 2, and the mass flow controller 2 is connected to the electrical control system.

2. The isobaric oxygen permeability tester according to claim 1, characterized in that: An operation experiment interface is arranged on one side of the electrical control system.

3. The isobaric oxygen permeability tester according to claim 1, characterized in that: The test cavity is provided with a locking mechanism.

4. The isobaric oxygen permeability tester according to claim 1, characterized in that: The first pressure reducing valve is connected to the first pressure sensor, and the second pressure reducing valve is connected to the second pressure sensor.

5. The isobaric oxygen permeability tester according to claim 1, characterized in that: The pressure reducing valve 1 is connected to the solenoid valve 1, the pressure reducing valve 2 is connected to the solenoid valve 3, and the solenoid valve 1 is connected to the solenoid valve 3.

6. The isobaric oxygen permeability tester according to claim 2, characterized in that: The electrical control system is connected to a solenoid valve 4, which is connected to an oxygen sensor. A solenoid valve 5 is arranged on one side of the oxygen sensor, which is connected to a gas processor.

7. The isobaric oxygen permeability tester according to claim 3, characterized in that: The test chamber is divided into two parts, an upper part and a lower part, and the sample is placed in the middle of the test chamber.

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