Food nitrogen package air tightness detection device

Abstract

The utility model relates to the technical field of food detection, in particular to a food nitrogen package air tightness detection device which comprises a detection bin body, a plurality of placing notches are formed in the detection bin body at equal intervals, and detection chambers corresponding to the placing notches are arranged in the detection bin body. A plurality of detection chambers are arranged on the detection bin body, a plurality of storage cylinders with nitrogen packages are placed in the detection chambers through placing notches, telescopic parts are arranged in the detection bin body, sealing cylinders corresponding to the storage cylinders in the detection chambers are arranged at the movable ends of the telescopic parts, and the detection chambers are arranged on the detection bin body, so that a plurality of food nitrogen packages can be placed for detection operation. The food nitrogen package is sealed in the sealed cavity formed by the storage barrel part and the sealed barrel part, gas in the sealed cavity is pumped away through the vacuum pump, so that the purpose of reducing the air pressure is achieved, the interior of the sealed cavity is detected in real time through the detection assembly, and then whether the food nitrogen package leaks or not can be detected.

Description

Technical Field

[0001] The utility model relates to the technical field of food detection, in particular to an airtightness detection device for food nitrogen packaging. Background Art

[0002] Nitrogen packaging of food is a food packaging technology that adjusts the gas composition within the package, usually by injecting nitrogen into the package to replace or reduce the concentration of oxygen, in order to extend the shelf life of food and maintain its quality. As an inert gas, nitrogen does not chemically react with food and does not affect the flavor and texture of food. Through nitrogen packaging, food can remain fresh, taste good, and reduce the deterioration of food quality. However, if the packaging nitrogen leaks, it will affect the quality of the food. Therefore, nitrogen packaging testing must be carried out on nitrogen-packaged foods after production.

[0003] However, when testing nitrogen packaging of food, the bubble method is currently mainly used. Its main operating steps are to immerse the nitrogen packaging of food in a barrel filled with water and then observe the gas escape to determine the airtightness of the food nitrogen packaging. However, this method is only suitable for testing a single package and is not suitable for testing multiple packages at the same time. If there are many nitrogen packaging of food that need to be tested, the detection efficiency of this method is low. Secondly, this detection method will cause water to adhere to the nitrogen packaging of the food being tested. If it is to be recovered for continued use, the water attached to the packaging needs to be reprocessed, which is time-consuming and labor-intensive.

[0004] Based on the above situation, it is necessary to design a food nitrogen packaging airtightness detection device to solve the above problems. Utility Model Content

[0005] The utility model provides a device for detecting air tightness of food nitrogen packages, so as to solve the problem in the prior art that multiple food nitrogen packages cannot be detected.

[0006] The technical problem solved by the present invention is achieved by the following technical solutions:

[0007] A device for detecting air tightness of nitrogen packaging of food, comprising a detection bin body, a plurality of insertion slots being equidistantly formed on the detection bin body, a detection chamber corresponding to the insertion slots being provided inside the detection bin body, a storage cylinder containing the nitrogen packaging being placed inside the detection chamber through the insertion slots, a telescopic member being provided inside the detection bin body, a sealing cylinder being provided at a movable end of the telescopic member corresponding to the storage cylinder inside the detection chamber, a sealed cavity being formed between the sealing cylinder and the storage cylinder when the telescopic member drives the sealing cylinder to connect with the storage cylinder, a detection component for detecting nitrogen and air pressure inside the sealed cavity being provided on the sealing cylinder, and an exhaust component for extracting gas from the sealed cavity being provided inside the detection bin body.

[0008] Preferably, it also includes a bracket, which is connected to the movable end of the telescopic member. The air extraction component includes a vacuum pump with several input ends and an air duct connected to the input end of the vacuum pump. The input end of the air duct is connected to the interior of the sealing cylinder. The vacuum pump is connected to the bracket.

[0009] Preferably, it further includes a controller connected to the detection chamber body, the detection component includes an air pressure sensor and a nitrogen sensor, the output ends of the air pressure sensor and the nitrogen sensor are respectively connected to the controller, the air pressure sensor and the nitrogen sensor are used to sense the changes in air pressure and nitrogen concentration in the sealed cavity and form electrical signals for output, and the controller displays them after receiving the electrical signals.

[0010] Preferably, the bottom of the detection chamber is provided with a placement slot corresponding to the bottom of the object-placing tube, and the side wall of the detection chamber is provided with a stopper in contact with the side wall of the object-placing tube.

[0011] Preferably, a ventilation mesh is provided inside the storage cylinder, and the ventilation mesh is not in contact with the bottom of the storage cylinder.

[0012] Preferably, a sealing member 1 is connected to the opening of the storage cylinder, a clamping portion is provided at the opening of the sealing cylinder, a sealing member 2 is provided in the clamping portion, and the positions of the sealing member 1 and the sealing member 2 correspond to each other.

[0013] Preferably, a fixed base is provided below the detection chamber body, and the detection chamber body is rotatably connected to the fixed base.

[0014] The beneficial effects of the present invention are as follows: by arranging a plurality of detection chambers on the detection bin body, a plurality of food nitrogen packages can be placed for detection operation, and then the food nitrogen packages are sealed in a sealed cavity formed by the placement cylinder and the sealing cylinder, and then the gas inside the sealed cavity is extracted by using a vacuum pump, thereby achieving the purpose of reducing the air pressure. During this process, the detection component will perform real-time detection on the inside of the sealed cavity, and then it can be detected whether the food nitrogen package is leaking. In this way, a plurality of food nitrogen packages can be detected at the same time, which improves the detection efficiency. Before and after the detection, no damage will be caused to the complete food nitrogen package, and no pollution will be caused to the outside of the food nitrogen package. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation scheme of the present invention or the technical scheme in the prior art, the drawings required for use in the implementation scheme or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation schemes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model Figure 1 ;

[0017] Figure 2 It is a front view of the utility model;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model Figure 2 ;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the storage cylinder and the sealing cylinder of the utility model;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the sealing cavity of the utility model;

[0021] Figure 6 This is a schematic diagram of the internal structure of the detection bin of the present utility model.

[0022] In the figure, 1. detection chamber body; 2. placement slot; 3. detection chamber; 4. storage cylinder; 5. telescopic part; 6. sealing cylinder; 7. sealing cavity; 8. bracket; 9. vacuum pump; 10. air guide tube; 11. controller; 12. air pressure sensor; 13. nitrogen sensor; 14. placement slot; 15. block; 16. ventilation mesh; 17. seal 1; 18. seal 2; 19. clamping part; 20. annular groove; 21. fixed base. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0024] Reference Figures 1-6 As shown, a device for detecting air tightness of nitrogen packaging of food includes a detection bin body 1, a plurality of insertion slots 2 are equidistantly opened on the detection bin body 1, a detection chamber 3 corresponding to the insertion slot 2 is provided inside the detection bin body 1, a storage tube 4 with nitrogen packaging is placed inside the detection chamber 3 through the insertion slot 2, a telescopic member 5 is provided inside the detection bin body 1, the telescopic member 5 is preferably a telescopic rod that can output function in a linear direction, the movable end of the telescopic member 5 is provided with a sealing cylinder 6 corresponding to the storage tube 4 inside the detection chamber 3, when the telescopic member 5 drives the sealing cylinder 6 to connect with the storage tube 4, a sealed cavity 7 is formed between the sealing cylinder 6 and the storage tube 4, a detection component for detecting nitrogen and air pressure inside the sealed cavity 7 is provided on the sealing cylinder 6, and an exhaust component for extracting the gas inside the sealed cavity 7 is provided inside the detection bin body 1.

[0025] When in use, several storage tubes 4 containing food nitrogen packages are respectively sent into the slots 2 and placed in the corresponding detection chambers 3. A storage tube 4 is placed in each detection chamber 3. Then the telescopic member 5 is started. The output end of the telescopic member 5 drives the sealing tubes 6 corresponding to the several storage tubes 4 to move downward until the storage tubes 4 are connected to the sealing tubes 6. At this time, the sealed cavity 7 formed between the storage tubes 4 and the sealing tubes 6 is a closed cavity, which is not connected to the external gas. Then the vacuum component is used to extract the gas inside the sealed cavity 7. As the gas is extracted, it gradually loses from the sealed cavity 7. At this time, the sealed cavity 7 gradually becomes a vacuum state. After the gas is extracted to a certain extent, the vacuum component is stopped. During this process, the detection component will perform real-time detection of the air pressure and nitrogen concentration content of the sealed cavity 7. Since several sealed cavities 7 share the same vacuum component, The rate of gas extraction from the sealed cavity 7 is similar, so the air pressure between several sealed cavities 7 is in a relatively similar state at this time. During the operation of the above structure, the nitrogen package will gradually expand as the air pressure inside the sealed cavity 7 gradually decreases. If there is a hole in the nitrogen package, nitrogen will escape into the sealed cavity 7, thereby increasing the nitrogen concentration inside the sealed cavity 7. As a result, the air pressure inside the sealed cavity 7 will also increase relatively. The nitrogen concentration and air pressure inside the sealed cavity 7 are detected in real time by the detection component. During this process, the detection component will perform real-time detection on the inside of the sealed cavity 7, and then detect whether the food nitrogen package is leaking. In this way, multiple food nitrogen packages can be detected at the same time, which improves the detection efficiency. Before and after the detection, the complete food nitrogen package will not be damaged, and the outside of the food nitrogen package will not be contaminated.

[0026] It also includes a bracket 8, which is connected to the movable end of the telescopic member 5. The exhaust component includes a vacuum pump 9 with several input ends and an air duct 10 connected to the input end of the vacuum pump 9. The input end of the air duct 10 is connected to the interior of the sealing cylinder 6. The vacuum pump 9 is connected to the bracket 8. When in use, the vacuum pump 9 will extract the gas inside the sealed cavity 7 through the air duct 10, thereby reducing the air pressure inside the sealed cavity 7.

[0027] It also includes a controller 11 connected to the detection chamber 1. The detection component includes an air pressure sensor 12 and a nitrogen sensor 13. The air pressure sensor 12 and the nitrogen sensor 13 are both existing technical structures. The air pressure sensor 12 is a device for detecting air pressure changes in a closed environment. When the sensitive element inside the air pressure sensor is subjected to gas pressure, it will undergo slight deformation. These deformations will cause changes in electrical quantities, such as changes in resistance or capacitance. The air pressure sensor can then convert the gas pressure into an electrical signal output. Next, the nitrogen sensor 13 is a device specially designed to measure the nitrogen concentration in the environment. These devices usually use electrochemical sensors or infrared sensors to detect nitrogen, which can provide real-time monitoring and form electrical signals after nitrogen sensing for external transmission. The output ends of the air pressure sensor 12 and the nitrogen sensor 13 are respectively connected to the controller 11. The controller 11 receives the electrical signals of air pressure changes and nitrogen concentration changes and displays them. In the structure of the present utility model, the controller 11 has the function of displaying data, and the controller 11 is an existing technical device and will not be elaborated in detail.

[0028] Furthermore, in order to facilitate the quick and stable placement of the storage tube 4 when it is placed in the detection chamber 3 to prevent the storage tube 4 from shaking, a placement slot 14 corresponding to the bottom of the storage tube 4 is provided at the bottom of the detection chamber 3, and a stopper 15 in contact with the side wall of the storage tube 4 is provided on the side wall of the detection chamber 3. When in use, when the handheld storage tube 4 is placed into the detection chamber 3 through the placement slot 2, the storage tube 4 is placed in the placement slot 14. At this time, the stopper 15 contacts the outer wall of the storage tube 4 to prevent the storage tube 4 from tilting or falling. The position of the placement slot 14 corresponds to the position of the sealing tube 6, which facilitates the subsequent docking of the sealing tube 6 with the storage tube 4. Secondly, the storage tube 4 can be movably placed on the detection chamber 3, which also facilitates the cleaning of the storage tube 4 and prevents debris from remaining inside the storage tube 4, thereby affecting the stability of the air pressure.

[0029] A seal 17 is connected to the opening of the storage tube 4, and a clamping portion 19 is provided at the opening of the sealing tube 6. A seal 2 18 is provided in the clamping portion 19, and the positions of the seal 17 and the seal 2 18 correspond to each other. The clamping portion 19 is an annular member connected to the opening of the sealing tube 6 and provided with an annular groove 20. The seal 2 18 is connected to the inside of the annular groove 20. In the process of docking the storage tube 4 and the sealing tube 6, the seal 17 enters through the annular groove 20 and then contacts the seal 2 18. The materials of the seal 17 and the seal 2 18 are deformable elastic materials, preferably rubber. Rubber is a commonly used material for sealing rings in existing technical structures. It has good elastic properties and durability. When the seal 17 and the seal 2 18 are docked, the sealing of the sealing cavity 7 can be increased to prevent external gas from invading the inside of the sealing cavity 7.

[0030] Furthermore, a ventilation mesh 16 is provided inside the storage cylinder 4, and the ventilation mesh 16 does not contact the bottom of the storage cylinder 4. After the food nitrogen package is placed on the ventilation mesh 16, the outside of the food nitrogen package is in an unobstructed state, preventing the food nitrogen package from being squeezed by its own weight, which makes it impossible to detect whether the squeezed part is leaking or not.

[0031] Reference Figure 2 As shown, further, a fixed base 21 is provided under the detection chamber body 1, and the detection chamber body 1 is rotatably connected to the fixed base 21, which facilitates the placement of food nitrogen packaging into the detection chamber 3. During operation, the need to move the detection chamber body 1 as a whole is avoided, which causes trouble.

Claims

1. A device for detecting air tightness of nitrogen packaging of food, comprising a detection chamber (1), wherein a plurality of slots (2) are provided on the detection chamber (1) at equal intervals, and characterized in that: The detection chamber (1) is provided with a detection chamber (3) corresponding to the placement slot (2), and the storage cylinder (4) containing the nitrogen package is placed in the detection chamber (3) through the placement slot (2). The detection chamber (1) is provided with a telescopic member (5), and the movable end of the telescopic member (5) is provided with a sealing cylinder (6) corresponding to the storage cylinder (4) in the detection chamber (3). When the telescopic member (5) drives the sealing cylinder (6) to connect with the storage cylinder (4), a sealed cavity (7) is formed between the sealing cylinder (6) and the storage cylinder (4). The sealing cylinder (6) is provided with a detection component for detecting the nitrogen and air pressure in the sealed cavity (7). The detection chamber (1) is provided with an exhaust component for extracting the gas in the sealed cavity (7).

2. A food nitrogen packaging airtightness detection device according to claim 1, characterized in that: It also includes a bracket (8), the bracket (8) is connected to the movable end of the telescopic member (5), the air extraction component includes a vacuum pump (9) provided with a plurality of input ends and an air guide tube (10) connected to the input end of the vacuum pump (9), the input end of the air guide tube (10) is connected to the interior of the sealing cylinder (6), and the vacuum pump (9) is connected to the bracket (8).

3. The device for detecting air tightness of food nitrogen packaging according to claim 1, characterized in that: The invention also includes a controller (11) connected to the detection chamber (1), and the detection component includes an air pressure sensor (12) and a nitrogen sensor (13). The output ends of the air pressure sensor (12) and the nitrogen sensor (13) are respectively connected to the controller (11). The air pressure sensor (12) and the nitrogen sensor (13) are used to sense the air pressure change and the nitrogen concentration change in the sealed cavity (7) and generate an electrical signal for output. The controller (11) displays the received electrical signal.

4. The device for detecting air tightness of food nitrogen packaging according to claim 1, characterized in that: The bottom of the detection chamber (3) is provided with a placement slot (14) corresponding to the bottom of the object placement cylinder (4), and the side wall of the detection chamber (3) is provided with a stopper (15) in contact with the side wall of the object placement cylinder (4).

5. The device for detecting air tightness of food nitrogen packaging according to claim 1, characterized in that: A ventilation mesh (16) is provided inside the storage cylinder (4), and the ventilation mesh (16) does not contact the bottom of the storage cylinder (4).

6. The device for detecting air tightness of food nitrogen packaging according to claim 1, characterized in that: The opening of the storage cylinder (4) is connected to a sealing member 1 (17), the opening of the sealing cylinder (6) is provided with a clamping portion (19), the clamping portion (19) is provided with a sealing member 2 (18), and the positions of the sealing member 1 (17) and the sealing member 2 (18) correspond to each other.

7. The device for detecting air tightness of food nitrogen packaging according to claim 1, characterized in that: A fixed base (21) is provided below the detection chamber body (1), and the detection chamber body (1) is rotatably connected to the fixed base (21).

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