Leak detection device for sealed containers based on the concentration method

Abstract

The utility model discloses a sealed container leak detection device based on concentration method, including the replacement gas source, first valve, second valve, sealed detection room, vacuum pump and oxygen concentration analyzer that set gradually, the replacement gas source is used for reducing the oxygen concentration in sealed detection room, sealed detection room is used for detecting sealed container and provides sealed space for sealed container, vacuum pump is used for the sealed detection room of containing sealed container and draws vacuum, oxygen concentration analyzer is used for detecting the oxygen concentration in sealed detection room. The utility model will tiny, difficult direct measurement's " leakage flow " into a huge, easy to measure " relative concentration change rate ".

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, and in particular to a leak detection device for sealed containers based on the concentration method. Background Technology

[0002] The sealing requirements for general containers are not high; they only need to achieve an airtight seal to prevent the fluid inside from leaking out. However, many sealed containers need to achieve a certain level of pressure resistance and sealing performance to ensure the safety of the fluid inside during filling, transportation, and storage. Existing leak detection devices have poor detection accuracy. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a leak detection device for sealed containers based on the concentration method.

[0004] The objective of this utility model is achieved through the following technical solution: A leak detection device for sealed containers based on concentration method includes a replacement gas source, a first valve, a second valve, a sealing detection chamber, a vacuum pump, and an oxygen concentration analyzer arranged in sequence. The replacement gas source is used to reduce the oxygen concentration in the sealed detection room; The sealing test chamber is used to test sealed containers and provide a sealing space for them. The vacuum pump is used to evacuate the sealing test chamber containing the sealed container; The oxygen concentration analyzer is used to detect the oxygen concentration in a sealed detection chamber.

[0005] Furthermore, the replacement gas source reduces the oxygen concentration in the sealed detection chamber to 0.1%.

[0006] Furthermore, the replacement gas in the replacement gas source is nitrogen.

[0007] Furthermore, the replacement gas is disposed inside a steel cylinder.

[0008] Furthermore, the sealing test chamber is equipped with a pressure gauge for detecting the pressure inside the sealing test chamber.

[0009] Furthermore, the first valve is a solenoid valve.

[0010] Furthermore, the second valve is a regulating valve.

[0011] Furthermore, a flow meter is installed between the second valve and the sealing detection chamber.

[0012] The beneficial effects of this utility model are: 1) This utility model transforms the tiny, difficult-to-measure “leakage flow rate” into a huge, easily measurable “relative concentration change rate”.

[0013] 2) This utility model allows for free adjustment of testing standards without damaging the product, and the purity of nitrogen gas can be freely adjusted to minimize production and operating costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the leak detection device for sealed containers based on the concentration method in this embodiment of the present invention. In the diagram, 1 is the replacement gas source; 2 is the first valve; 3 is the second valve; 4 is the sealing detection chamber; 5 is the vacuum pump; 6 is the oxygen concentration analyzer; 7 is the pressure gauge; and 8 is the flow meter. Detailed Implementation

[0015] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] See Figure 1 This utility model provides a technical solution: Example: A leak detection device for sealed containers based on concentration method includes a replacement gas source 1, a first valve 2 (the first valve 2 is a solenoid valve used to control the opening and closing of the gas path), a second valve 3 (the second valve 3 is a regulating valve used to regulate the nitrogen flow rate), a sealing detection chamber 4, a vacuum pump 5, and an oxygen concentration analyzer 6 arranged in sequence. The replacement gas source 1 may be, but is not limited to, nitrogen gas housed in a steel cylinder, which is used to reduce the oxygen concentration in the sealed detection chamber 4 to 0.1%. The sealing test chamber 4 is used to test the sealed container and provide a sealing space for the sealed container; The vacuum pump 5 is used to evacuate the sealing test chamber 4 containing the sealed container; The oxygen concentration analyzer 6 is used to detect the oxygen concentration inside the sealed detection chamber 4.

[0017] The sealing test chamber 4 is equipped with a pressure gauge 7 for detecting the pressure inside the sealing test chamber 4.

[0018] A flow meter 8 is installed between the second valve 3 and the sealing detection chamber 4. The flow meter 8 allows for visual flow adjustment, reducing nitrogen usage and wasting costs. Among them, 1. The sealed container is the product to be inspected.

[0019] Working principle: Place the sealed container into the sealed detection chamber 4, open the first valve 2, and fill the sealed container with nitrogen to displace the gas in the sealed detection chamber 4. When the oxygen concentration analyzer 6 detects that the oxygen concentration in the displaced gas is less than or equal to 0.1%, close the first valve 2 and stop the nitrogen supply.

[0020] When vacuum pump 5 is started, oxygen in the sealed container will flow outward (to the sealed detection chamber 4) and then flow through vacuum pump 5 to oxygen concentration analyzer 6. If the oxygen concentration detected by oxygen concentration analyzer 6 rises to a certain value (e.g., 1000 PPM), it is considered that there is a leak in the sealed container. Conversely, if no concentration value is detected, the equipment will stop working when the negative pressure value reaches a certain value, and the sealed container will be judged to be qualified and there is no leak.

[0021] This device utilizes the fact that the concentration of gas in the detection room is high, and the concentration will rise several times in an instant. The concentration detection is magnified, for example: O2% in the air = 21%, if the detection standard is 1000PPM (0.1%), then it is 210 times.

[0022] This invention transforms the tiny, difficult-to-measure "leakage flow rate" into a huge, easily measurable "relative concentration change rate".

[0023] This invention allows for free adjustment of testing standards without damaging the product, and the purity of the nitrogen gas used can be freely adjusted, thereby minimizing production and operating costs.

[0024] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A leak detection device for sealed containers based on concentration method, characterized in that: It includes a replacement gas source, a first valve, a second valve, a sealing detection chamber, a vacuum pump, and an oxygen concentration analyzer, arranged sequentially. The replacement gas source is used to reduce the oxygen concentration in the sealed detection room; The sealing test chamber is used to test sealed containers and provide a sealing space for them. The vacuum pump is used to evacuate the sealing test chamber containing the sealed container; The oxygen concentration analyzer is used to detect the oxygen concentration in the sealed detection chamber.

2. The leak detection device for sealed containers based on the concentration method according to claim 1, characterized in that: The replacement gas source reduces the oxygen concentration in the sealed detection chamber to 0.1%.

3. The leak detection device for sealed containers based on the concentration method according to claim 1, characterized in that: The replacement gas in the replacement gas source is nitrogen.

4. The leak detection device for sealed containers based on the concentration method according to claim 3, characterized in that: The replacement gas is placed inside a steel cylinder.

5. The leak detection device for sealed containers based on the concentration method according to claim 1, characterized in that: The sealing test chamber is equipped with a pressure gauge for detecting the pressure inside the sealing test chamber.

6. The leak detection device for sealed containers based on the concentration method according to claim 1, characterized in that: The first valve is a solenoid valve.

7. The leak detection device for sealed containers based on the concentration method according to claim 1, characterized in that: The second valve is a regulating valve.

8. The leak detection device for sealed containers based on the concentration method according to claim 1, characterized in that: A flow meter is installed between the second valve and the sealing test chamber.

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