Food packaging tin air tightness detection device

Abstract

The utility model discloses a food packaging tin air tightness detection device, which belongs to the technical field of product packaging air tightness detection and comprises a gland and a water container, and the gland is pressed at the opening end of a to-be-detected tin body and seals the opening end of the to-be-detected tin body; the gland is provided with an air passage and is connected with air supply equipment, the gland is provided with an air outlet corresponding to the opening position of the tank body to be detected, and the air outlet is communicated with the air passage; the water container is an open container, the water container bears the closed end of the to-be-detected tank body, and the gland is matched with the water container to fix the to-be-detected tank body. According to the utility model, the requirement on the overall airtightness of the detection device is lower, the relative position of the gland and the water container can be adjusted according to the height of the tank body to be detected, and airtightness detection can be conveniently carried out on tanks with different specifications.

Description

Technical Field

[0001] This utility model relates to the field of product packaging airtightness testing technology, specifically, to a food packaging can airtightness testing device. Background Technology

[0002] Food canning is a preservation method that involves sealing food in a container and killing most microorganisms through a sterilization process. Under conditions of airtightness and vacuum, food can be stored at room temperature for a long time. The airtightness of canned food determines its quality and pass rate. Therefore, testing the airtightness of food cans is crucial to the health of the food.

[0003] In the prior art, such as Chinese patent document CN206960074U, an airtightness testing system for a can is disclosed, including a testing container, a filter can, and an air pump. The testing container includes a cylinder with a closed lower end and a cover similar to the closed cylinder. The cover includes a top cover for closing the cylinder and a pressure plate fixed below the top cover for extending into the cylinder. The top cover has a vent hole, which is connected to the outlet of the filter can through a pipe. The inlet of the filter can is connected to the air inlet of the air pump through a pipe. An oil filter element is installed inside the filter can.

[0004] The gasoline overflowing from the air pump described in this patent document can be filtered by the filter canister and will not contaminate the testing container. However, when testing the airtightness of the canister, the entire canister needs to be submerged in water within the testing container's cylinder, the cylinder sealed with a cap, and air evacuated from the cylinder. The presence of bubbles in the water is then observed to determine if the canister is leaking. Due to the manufacturing process, leaks are typically located at both ends of the canister. This testing method places extremely high demands on the sealing of the testing container. Furthermore, the canister's dimensions are easily limited by the volume of the testing container, making it inconvenient to test the airtightness of canisters of different sizes. Utility Model Content

[0005] The purpose of this utility model is to provide a food packaging can airtightness testing device, which solves the problem in the prior art that the sealing requirements of the testing container are extremely high, and the size of the can is easily limited by the volume of the testing container, making it inconvenient to test the airtightness of cans of different sizes.

[0006] To achieve the above objectives, this utility model provides a food packaging can airtightness testing device, including a cap and a water container. The cap is pressed onto the open end of the can to be tested and seals it. The cap is provided with an air passage and connected to an air supply device. The cap is provided with an air outlet corresponding to the opening position of the can to be tested, and the air outlet is connected to the air passage. The water container is an open container that supports the closed end of the can to be tested. The cap, together with the water container, fixes the can to be tested.

[0007] Furthermore, the pressure cap includes a first plane and a second plane arranged opposite to each other, the surface of the second plane is provided with a flexible sealing layer, the air outlet is located on the second plane and penetrates the flexible sealing layer; the flexible sealing layer completely covers the open end of the tank to be tested.

[0008] Furthermore, a clamping device is provided on one side of the first plane of the cover, the clamping device contacting the first plane and applying pressure to the first plane.

[0009] Furthermore, the clamping device includes a clamping bracket and a clamping screw. The clamping bracket includes a top rod and side rods respectively connected to both ends of the top rod. The top rod is placed horizontally above the first plane, and the side rods extend into the water container and are connected to the water container. The clamping screw passes through the top rod and is threadedly connected to the top rod. The end of the clamping screw abuts against the first plane.

[0010] Furthermore, a positioning groove is provided on the first plane at the position corresponding to the end of the clamping screw.

[0011] Furthermore, the distance between the top rod and the inner bottom surface of the water container is greater than the height of the tank to be tested, and the distance between the two side rods is greater than the maximum diameter of the tank to be tested.

[0012] Furthermore, the pressure cap is connected to the air supply device via an air pipe, and the air pipe is connected to a pressure regulating switch, which is located near the pressure cap.

[0013] Furthermore, a pressure gauge is installed on the pressure cap, and the pressure gauge is connected to the air pipe.

[0014] Furthermore, the pressure gauge is mounted on a first plane, with the dial of the pressure gauge facing the direction of the human eye.

[0015] Furthermore, the inner bottom surface of the water container is provided with a positioning protrusion, which surrounds the closed end of the tank to be tested.

[0016] Compared with existing known technologies, the technical solution provided by this utility model has the following beneficial effects:

[0017] This invention relates to an airtightness testing device for food packaging cans. A pressure cap is pressed onto and seals the open end of the can under test, creating a sealed space inside. The pressure cap is connected to an air supply device, which supplies air into the can through an air passage and outlet. An open-top water container is used, filled with water that submerges the sealed end of the can. If air bubbles are generated inside the water container when air is supplied into the can, the sealed end of the can leaks; otherwise, it does not. The pressure cap and water container secure the can and perform airtightness testing on its sealed end. The open-top water container also reduces the overall sealing requirements of the testing device. The pressure cap and water container are relatively independent, and their relative positions can be adjusted according to the height of the can, facilitating airtightness testing of cans of different sizes.

[0018] It is obvious that the elements or features described in the above individual embodiments can be used alone or in combination in other embodiments. Attached Figure Description

[0019] The dimensions and scales in the accompanying drawings do not represent the actual dimensions and scales of the product. The drawings are for illustrative purposes only, and some non-essential elements or features have been omitted for clarity.

[0020] Figure 1 This is a schematic diagram of the airtightness detection device in an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the pressure cap as viewed from the second plane direction in an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the pressure cap as viewed from the first plane direction in an embodiment of this utility model.

[0023] Explanation of reference numerals in the attached figures

[0024] 100. Test tank; 200. Pressure cap; 210. First plane; 211. Positioning groove; 220. Second plane; 221. Air outlet; 300. Water container; 310. Positioning protrusion; 400. Clamping device; 410. Clamping bracket; 411. Top rod; 412. Side rod; 420. Clamping screw; 500. Air pipe; 510. Pressure regulating switch; 520. Pressure gauge. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings. The embodiments described herein are merely preferred embodiments of the present invention. Those skilled in the art can conceive of other ways to implement the present invention based on the preferred embodiments, and such other ways also fall within the scope of the present invention.

[0026] Reference Figures 1-3 This application provides a device for testing the airtightness of a food packaging can, used to test the airtightness of a can 100 to be tested. One end of the can 100 is open, and the other end is closed. The testing device includes a cap 200 and a water container 300. The cap 200 is located above the water container 300 and presses against the open end of the can 100 to seal it. The cap 200 itself has a certain weight and can press firmly against the open end of the can 100 under its own weight. The cap 200 is provided with an air passage and connected to an air supply device. The cap 200 has an air outlet 221 corresponding to the open position of the can 100, which is connected to the air passage. The air supply device, which is an air pump, supplies air into the interior of the can 100 from the air passage and the air outlet 221. The water container 300 is an open container with an open top and has a basin-shaped structure. The water container 300 supports the closed end of the test tank 100, and the pressure cap 200 works with the water container 300 to fix the test tank 100.

[0027] Understandably, the cap 200 presses against and seals the open end of the test container 100, creating a closed space inside. The water container 300 is an open container filled with water, submerging the closed end of the test container 100. If air is introduced into the test container 100, air bubbles will form inside the water container 300, indicating a leak at the closed end; otherwise, there will be no leak. The cap 200 and water container 300 secure the test container 100 and perform an airtightness test on the closed end. Since the water container 300 is open, the overall sealing requirements for the testing device are lower. The cap 200 and water container 300 cooperate but are relatively independent; their relative positions can be adjusted according to the height of the test container 100, facilitating airtightness testing of containers of different sizes.

[0028] Furthermore, to enhance the sealing performance of the gland 200 over the test tank 100, such as... Figure 2 and Figure 3As shown, the pressure cap 200 includes a first plane 210 and a second plane 220 disposed opposite to each other. The first plane 210 is the upper surface, and the second plane 220 is the lower surface. The second plane 220 is disposed towards the open end of the test tank 100. A flexible sealing layer is disposed on the surface of the second plane 220. An air outlet 221 is disposed on the second plane 220 and penetrates the flexible sealing layer to prevent the flexible sealing layer from blocking the air outlet 221. When the pressure cap 200 is pressed against the open end of the test tank 100, the flexible sealing layer directly contacts the open end of the test tank 100 and completely covers the open end of the test tank 100. The flexible sealing layer deforms under the gravity of the pressure cap 200, sealing the opening of the test tank 100. In this embodiment, the flexible sealing layer is made of silicone or rubber.

[0029] In some embodiments, to increase the clamping force of the cap 200 and thus enhance the sealing performance of the cap 200 at the opening of the test tank 100, a clamping device 400 is provided on one side of the first plane 210 of the cap 200. The clamping device 400 contacts the first plane 210 and applies pressure to it. Under the action of the clamping device 400, the cap 200 further presses against the opening of the test tank 100, and the flexible sealing layer further deforms, improving the sealing performance.

[0030] Specifically, such as Figure 1 As shown, the clamping device 400 includes a clamping bracket 410 and a clamping screw 420. The clamping bracket 410 includes a top rod 411 and side rods 412 respectively connected to both ends of the top rod 411. The top rod 411 is horizontally positioned above the first plane 210, and the side rods 412 extend into and connect to the water container 300. The two side rods 412 and the top rod 411 form a frame structure, and there is a receiving space between the two side rods 412 for placing the pressure cap 200. The clamping screw 420 passes through the top rod 411 and is threadedly connected to the top rod 411. The end of the clamping screw 420 abuts against the first plane 210. Rotating the clamping screw 420 can cause the output end of the clamping screw 420 to move closer to or further away from the pressure cap 200. When the output end of the clamping screw 420 moves closer to the pressure cap 200, the pressure of the clamping screw 420 on the pressure cap 200 increases, further improving the sealing performance of the pressure cap 200 on the test tank 100.

[0031] Furthermore, a positioning groove 211 is provided on the first plane 210 corresponding to the end of the clamping screw 420. The positioning groove 211 facilitates the alignment of the clamping screw 420 with the contact position of the cap 200, preventing the clamping screw 420 from shifting. Moreover, the positioning groove 211 is located at the center of the first plane 210, which ensures that the cap 200 is pressed evenly, allowing the pressure of the cap 200 to be evenly transmitted to the open end of the test tank 100. The distance between the top rod 411 and the inner bottom surface of the water container 300 is greater than the height of the test tank 100, and the distance between the two side rods 412 is greater than the maximum diameter of the test tank 100. When the specifications of the test tank 100 change, the cap 200 has sufficient room to move within the frame of the clamping bracket 410, and can clamp test tanks 100 of different specifications in conjunction with the clamping screw 420.

[0032] Understandably, the pressure cap 200 is connected to the air supply equipment via an air pipe 500, which is connected to a pressure regulating switch 510, positioned close to the pressure cap 200. The pressure regulating switch 510 primarily employs a pressure regulating valve structure; its proximity to the pressure cap 200 minimizes the impact of pipeline pressure drop on control accuracy. A pressure gauge 520 is installed on the pressure cap 200, connected to the air pipe 500, and displays the inlet pressure of the pressure cap 200. The pressure gauge 520 is mounted on the first plane 210, with its dial facing the operator's eyes for easy real-time monitoring of pressure parameters.

[0033] In some embodiments, a positioning protrusion 310 is provided on the inner bottom surface of the water container 300, and the positioning protrusion 310 is arranged around the closed end of the test tank 100. The positioning protrusion 310 can facilitate the precise placement of the test tank 100 on the inner bottom of the water container 300, and facilitate the alignment of the cap 200 with the open end of the test tank 100.

[0034] In the description of this utility model, it should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The scope of protection of this utility model is defined only by the claims. Thanks to the teachings of this utility model, those skilled in the art will readily recognize that alternative structures to the disclosed structure can be used as feasible alternative implementations, and that the disclosed implementations can be combined to produce new implementations, which also fall within the scope of the appended claims.

Claims

1. A device for detecting the airtightness of food packaging cans, comprising a pressure cap (200) and a water container (300), characterized in that, The cap (200) presses against the open end of the test tank (100) and seals it; the cap (200) is provided with an air passage and connected to an air supply device; the cap (200) is provided with an air outlet (221) corresponding to the open position of the test tank (100), and the air outlet (221) is connected to the air passage; the water container (300) is an open container, the water container (300) carries the closed end of the test tank (100), and the cap (200) cooperates with the water container (300) to fix the test tank (100).

2. The airtightness testing device for food packaging cans according to claim 1, characterized in that, The pressure cap (200) includes a first plane (210) and a second plane (220) arranged opposite to each other. A flexible sealing layer is provided on the surface of the second plane (220). The air outlet (221) is located on the second plane (220) and passes through the flexible sealing layer. The flexible sealing layer completely covers the open end of the tank (100) to be tested.

3. The airtightness testing device for food packaging cans according to claim 2, characterized in that, A clamping device (400) is provided on one side of the first plane (210) of the cover (200), the clamping device (400) contacts the first plane (210) and applies pressure to the first plane (210).

4. The airtightness testing device for food packaging cans according to claim 3, characterized in that, The clamping device (400) includes a clamping bracket (410) and a clamping screw (420). The clamping bracket (410) includes a top rod (411) and side rods (412) respectively connected to both ends of the top rod (411). The top rod (411) is placed horizontally above the first plane (210). The side rods (412) extend into the water container (300) and are connected to the water container (300). The clamping screw (420) passes through the top rod (411) and is threadedly connected to the top rod (411). The end of the clamping screw (420) abuts against the first plane (210).

5. The airtightness testing device for food packaging cans according to claim 4, characterized in that, The first plane (210) is provided with a positioning groove (211) at the position corresponding to the end of the clamping screw (420).

6. The airtightness testing device for food packaging cans according to claim 4, characterized in that, The distance between the top rod (411) and the inner bottom surface of the water container (300) is greater than the height of the tank to be tested (100), and the distance between the two side rods (412) is greater than the maximum diameter of the tank to be tested (100).

7. The airtightness testing device for food packaging cans according to claim 2, characterized in that, The pressure cap (200) is connected to the gas supply device via a gas pipe (500), and the gas pipe (500) is connected to a pressure regulating switch (510), which is located near the pressure cap (200).

8. The airtightness testing device for food packaging cans according to claim 7, characterized in that, A pressure gauge (520) is installed on the pressure cap (200), and the pressure gauge (520) is connected to the air pipe (500).

9. The airtightness testing device for food packaging cans according to claim 8, characterized in that, The pressure gauge (520) is mounted on the first plane (210), and the dial of the pressure gauge (520) is oriented towards the human eye.

10. The food packaging can airtightness testing device according to claim 1, characterized in that, The water container (300) has a positioning protrusion (310) on its inner bottom surface, and the positioning protrusion (310) surrounds the closed end of the tank (100) to be tested.

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