Lunch box sealing test fixture structure

Abstract

This utility model belongs to the field of lunchbox sealing test technology, specifically relating to a lunchbox sealing test fixture structure, including a mounting plate, on which two first connecting plates and multiple mounting rods are arranged. One first connecting plate is equipped with a telescopic component, on which a piston is mounted, and a binding rope is attached to the bottom of the piston. The other first connecting plate is equipped with a moving component, on which a sealing plug is mounted. U-shaped tubes are mounted on the multiple mounting rods, with a piston at one end of the U-shaped tube and a sealing plug at the other end. A water inlet component and an exhaust pipe are also provided on the U-shaped tube. This device can quickly perform tests by detecting the presence or absence of air bubbles, greatly reducing the subjective judgment error of quality inspectors, while also being low in cost and investment.

Description

Technical Field

[0001] This utility model belongs to the field of lunch box sealing test technology, specifically relating to a lunch box sealing test fixture structure. Background Technology

[0002] As an important carrier of food packaging, the sealing performance of lunch boxes directly affects the hygiene and safety of food, its shelf life, and whether leakage will occur during transportation and storage. Therefore, sealing performance testing is a crucial quality inspection step in the lunch box production process.

[0003] Currently, there are various methods used in the industry to test the airtightness of lunch boxes (especially those with lids). One common method is a simple manual water test, which involves filling the lunch box with water, sealing it tightly, and then observing or squeezing the box to determine if there is any leakage. While this method is inexpensive, it relies entirely on the operator's subjective experience and judgment, making it inefficient and prone to misjudgments or missed detections due to human factors. Furthermore, the consistency, reliability, and traceability of the test results are poor.

[0004] To improve the accuracy and automation of testing, specialized sealing testing equipment based on negative or positive pressure principles has emerged on the market. These devices typically use pressure sensors to monitor pressure changes within a sealed cavity through vacuuming or pressurization, thereby indirectly determining the sealing performance of the food container. However, these devices are often complex in structure, expensive to manufacture, and require sophisticated sensors and electronic control systems. For many small and medium-sized food container manufacturers, the investment and maintenance costs are too high, making widespread adoption difficult.

[0005] To address this, we propose a fixture structure for testing the airtightness of lunch boxes. This device can perform rapid testing by detecting the presence or absence of air bubbles, greatly reducing the subjective judgment error of quality inspectors, while also being low in cost and investment. Utility Model Content

[0006] The purpose of this invention is to provide a fixture structure for testing the sealing performance of lunch boxes. This device can perform rapid testing by detecting the presence or absence of air bubbles, greatly reducing the subjective judgment error of quality inspectors, while also being low in cost and investment.

[0007] The specific technical solution adopted by this utility model is as follows: A fixture structure for testing the sealing performance of a lunchbox includes an mounting plate, on which two first connecting plates and multiple mounting rods are provided. One of the first connecting plates is provided with a telescopic component, on which a piston is provided, and at the bottom of the piston a binding rope is provided. The other first connecting plate is provided with a movable component, on which a sealing plug is provided. A U-shaped tube is installed on multiple mounting rods. A piston is provided at one end of the U-shaped tube, and a sealing plug is provided at the other end of the U-shaped tube. A water inlet assembly and an exhaust pipe are also provided on the U-shaped tube.

[0008] Furthermore, the telescopic assembly includes an electrically operated telescopic rod disposed on one of the first connecting plates, the telescopic end of the electrically operated telescopic rod being connected to the piston.

[0009] Furthermore, the movable component includes a threaded rod threaded onto another first connecting plate, the top of the threaded rod being provided with a rotating disk, and the bottom of the threaded rod being connected to the sealing plug.

[0010] Furthermore, the sealing plug is provided with a first thread, and the inner wall of one end of the U-shaped tube is provided with a second thread, the first thread and the second thread being matched.

[0011] Furthermore, the water inlet assembly includes a water inlet pipe connected to the U-shaped pipe, one end of which is equipped with a water tank, and a water pump and a first control valve are installed on the water inlet pipe.

[0012] Furthermore, a second control valve is provided on the exhaust pipe.

[0013] Furthermore, the water tank is equipped with a water inlet.

[0014] The technical effects achieved by this utility model are as follows: First, the lunchbox to be tested is tied to a binding rope. The moving component guides the sealing plug into one end of the U-shaped tube for sealing. Then, water is injected into the U-shaped tube through the water inlet component. After water injection, the water inlet component stops working to seal the tube. The telescopic component then moves the piston into the other end of the U-shaped tube, taking the lunchbox inside. At this point, the vent pipe opens to expel excess gas, then closes. The telescopic component continues to work, moving the piston downwards inside the U-shaped tube to compress the testing water. If the lunchbox is well-sealed, there will be no change in the box; if the box is poorly sealed, air bubbles will form. This device allows for rapid testing by detecting the presence or absence of air bubbles, significantly reducing subjective judgment errors by quality inspectors, while also being low-cost and requiring minimal investment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of the utility model; Figure 3 This is a schematic diagram of the structure of the U-shaped tube of this utility model; Figure 4 This is a schematic diagram of the sealing plug of this utility model.

[0016] The attached diagram lists the components represented by each number as follows: 1. Mounting plate; 2. First connecting plate; 3. Piston; 4. Binding rope; 5. Sealing plug; 6. U-shaped tube; 7. Exhaust pipe; 8. Electric telescopic rod; 9. Threaded rod; 10. Rotary disc; 11. First thread; 12. Second thread; 13. Water inlet pipe; 14. Water tank. Detailed Implementation

[0017] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0018] like Figures 1-4 As shown, a tooling structure for testing the sealing performance of a lunch box includes an mounting plate 1, on which two first connecting plates 2 and multiple mounting rods are provided. One first connecting plate 2 is provided with a telescopic component, on which a piston 3 is provided, and at the bottom of the piston 3 a binding rope 4 is provided. The other first connecting plate 2 is provided with a moving component, on which a sealing plug 5 is provided. A U-shaped tube 6 is installed on multiple mounting rods. A piston 3 is provided at one end of the U-shaped tube 6, and a sealing plug 5 is provided at the other end of the U-shaped tube 6. A water inlet assembly and an exhaust pipe 7 are also provided on the U-shaped tube 6.

[0019] This device can perform rapid testing by detecting the presence or absence of air bubbles, greatly reducing the subjective judgment error of quality inspectors, while also being low-cost and requiring minimal investment.

[0020] The telescopic assembly includes an electric telescopic rod 8 mounted on one of the first connecting plates 2. The telescopic end of the electric telescopic rod 8 is connected to the piston 3. The electric telescopic rod 8 drives the piston 3 to move downward so as to enter the U-shaped tube 6 for operation.

[0021] Meanwhile, the moving component includes a threaded rod 9 threaded onto another first connecting plate 2, with a rotating disk 10 at the top of the threaded rod 9 and a sealing plug 5 at the bottom of the threaded rod 9.

[0022] The rotating disk 10 drives the threaded rod 9 to rotate on the first connecting plate 2 and move downward. The threaded rod 9 drives the sealing plug 5 to move downward and enter the U-shaped tube 6 to seal, forming a sealed cavity.

[0023] Furthermore, the sealing plug 5 is provided with a first thread 11, and the inner wall of one end of the U-shaped tube 6 is provided with a second thread 12. The first thread 11 and the second thread 12 are matched, and this arrangement can achieve thread sealing and improve the sealing effect.

[0024] The water inlet assembly includes a water inlet pipe 13 connected to the U-shaped pipe 6. A water tank 14 is provided at one end of the water inlet pipe 13, and a water pump and a first control valve are provided on the water inlet pipe 13. When the first control valve is opened, the water pump is started so that the water inside the water tank 14 enters the U-shaped pipe 6 through the water inlet pipe 13. After the water filling is completed, the first control valve is closed for testing.

[0025] A second control valve is installed on the exhaust pipe 7 to control the discharge of gas.

[0026] It should be noted that the first and second control valves are manual control valves because human observation is required during sampling and testing. The installation method and structure of manual control valves are existing technologies and will not be elaborated on here.

[0027] Water tank 14 is equipped with a water inlet, through which water enters water tank 14.

[0028] The U-shaped tube 6 is made of a transparent material, such as an acrylic sheet, so that the inside can be clearly seen.

[0029] To improve work efficiency, the binding rope 4 can be replaced with an existing clamping structure, such as clamping by the elasticity of a spring or pressing by a pressure plate. These fixing structures are all existing technologies and will not be elaborated on here. This can improve the efficiency of changing lunch boxes.

[0030] The working principle of this invention is as follows: First, the lunchbox to be tested is tied to the binding rope 4. The moving component allows the sealing plug 5 to enter one end of the U-shaped tube 6 for sealing. Then, water is injected into the U-shaped tube 6 through the water inlet component. After water injection, the water inlet component stops working to seal the tube. The telescopic component drives the piston 3 into the other end of the U-shaped tube 6, taking the lunchbox with it. At this time, the exhaust pipe 7 opens to expel excess gas. Then, the exhaust pipe 7 is closed, and the telescopic component continues to work, driving the piston 3 to move downwards inside the U-shaped tube 6, squeezing the testing water. If the lunchbox is well-sealed, there will be no change in the lunchbox. If the lunchbox is poorly sealed, air bubbles will be generated. This device can quickly perform testing by detecting the presence or absence of air bubbles, greatly reducing the subjective judgment error of quality inspectors, while also being low-cost and requiring minimal investment.

[0031] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A meal box sealing detection tool structure comprising a mounting plate (1), characterized in that: The mounting plate (1) is provided with two first connecting plates (2) and multiple mounting rods. One of the first connecting plates (2) is provided with a telescopic component, and the telescopic component is provided with a piston (3). The bottom of the piston (3) is provided with a binding rope (4). The other first connecting plate (2) is provided with a moving component, and the moving component is provided with a sealing plug (5). A U-shaped tube (6) is installed on a plurality of the mounting rods. A piston (3) is provided at one end of the U-shaped tube (6), and a sealing plug (5) is provided at the other end of the U-shaped tube (6). A water inlet assembly and an exhaust pipe (7) are provided on the U-shaped tube (6).

2. The meal box leak detection tooling structure of claim 1, wherein: The telescopic assembly includes an electric telescopic rod (8) disposed on one of the first connecting plates (2), the telescopic end of which is connected to the piston (3).

3. The meal box tightness detection tool structure according to claim 1, wherein: The movable component includes a threaded rod (9) threaded onto another first connecting plate (2), with a rotating disk (10) at the top of the threaded rod (9) and the bottom of the threaded rod (9) connected to the sealing plug (5).

4. The meal box tightness detection tool structure according to claim 1, wherein: The sealing plug (5) is provided with a first thread (11), and the inner wall of one end of the U-shaped tube (6) is provided with a second thread (12), and the first thread (11) and the second thread (12) are matched.

5. The fixture structure for testing the sealing performance of lunch boxes according to claim 1, characterized in that: The water inlet assembly includes a water inlet pipe (13) connected to the U-shaped pipe (6), a water tank (14) is provided at one end of the water inlet pipe (13), and a water pump and a first control valve are provided on the water inlet pipe (13).

6. The meal box tightness detection tool structure according to claim 1, wherein: A second control valve is provided on the exhaust pipe (7).

7. The meal box tightness detection tool structure according to claim 5, characterized in that: The water tank (14) is equipped with a water inlet.

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