A portable packaging bag leak detection device
By designing a portable leak detection device for packaging bags, utilizing the principle of negative pressure and a detachable air extraction cylinder structure, the problem of insufficient portability of existing equipment is solved, and efficient seal detection is achieved in an environment without electricity.
Patent Information
- Application Number
- CN202522263428.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-10-27
AI Technical Summary
Existing leak detection equipment for packaging bags is bulky and lacks portability and flexibility to meet the needs of rapid on-site testing or outdoor environments without electricity.
A portable leak detection device for packaging bags was designed. It uses a leak detection cylinder made of transparent plastic material and combines a top cover, vertical plate, handle, pressure plate, air extraction tube, valve, air extraction cylinder and other structures. It uses the principle of negative pressure to detect the seal and achieves portability through a detachable air extraction cylinder fixing structure.
It enables packaging bag sealing detection without the need for electricity, improving the flexibility and practicality of the detection process. It is easy to operate and carry, and enhances the flexibility and convenience of the detection.
Smart Images
Figure CN224681745U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of packaging bag leak detection technology, and in particular relates to a convenient packaging bag leak detection device. Background Technology
[0002] Leak testing equipment for packaging bags uses methods such as negative pressure method (e.g., MFY-05S), positive pressure method (e.g., LSSD-01), and vacuum attenuation method to test the sealing performance of packaging bags. It is widely used in the food, pharmaceutical, and daily chemical industries.
[0003] Existing negative pressure sealing testers are bulky and require fixed locations for use, making it difficult to meet the needs of rapid on-site testing or outdoor environments without electricity. They also lack portability and flexibility, so improvements are needed. Therefore, a convenient packaging bag leak testing device is proposed. Utility Model Content
[0004] The purpose of this invention is to provide a convenient leak detection device for packaging bags to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model adopts the following technical solution: a convenient leak testing device for packaging bags, comprising a leak testing cylinder made of transparent plastic, with a top cover threadedly connected to the top of the cylinder. A vertical plate is slidably disposed in the middle of the top cover, a handle is fixedly installed at the top of the vertical plate, and a pressure plate is fixedly installed at the bottom of the vertical plate. An air extraction pipe is fixedly connected to the top side of the leak testing cylinder, a valve is disposed inside the air extraction pipe, and an air extraction cylinder is threadedly connected to the air extraction pipe. A piston disc is slidably disposed inside the air extraction cylinder. A movable rod is slidably mounted on the suction cylinder. The end of the movable rod is fixedly installed in the middle of the piston disc. A second handle is fixedly mounted on the outer end of the movable rod. A frame is fixedly mounted on the side of the leak detection cylinder. The size of the second handle is adapted to the inner diameter of the frame. An installation opening is provided on the side of the second handle. A spring is provided in the installation opening, and a fixing block is slidably mounted on the installation opening. The two ends of the spring are fixedly installed to the second handle and the fixing block, respectively. A fixing opening is provided on the inner wall of the frame. The fixing block and the fixing opening are set as matching arc surfaces.
[0006] As a further description of the above solution: by setting up a leak test cylinder, top cover, vertical plate, handle one, pressure plate, suction pipe, valve, suction cylinder, piston plate, movable rod, handle two, frame, mounting port, spring, fixing block, and the cooperation between the fixing ports, the device can be easily operated and carried as a whole. It can perform sealing tests on packaging bags without power, effectively improving the flexibility of the test and making it highly practical.
[0007] Preferably, the mounting port, spring, fixing block, and fixing port are arranged in two symmetrical sets.
[0008] As a further description of the above solution: the mounting port, spring, fixing block, and fixing port are set in two symmetrical sets, which can improve the stability of the suction cylinder fixed to the side of the side leakage cylinder.
[0009] Preferably, a bottom cover is threadedly connected to the middle of the bottom surface of the leak testing cylinder, and a handle is provided on the bottom cover.
[0010] As a further description of the above solution: a bottom cover is threadedly connected to the middle of the bottom surface of the leak testing cylinder, and a handle is provided on the bottom cover to facilitate opening the middle of the bottom surface of the leak testing cylinder and improve the convenience of drainage operation.
[0011] Preferably, the vertical plate is configured in a cross shape.
[0012] As a further description of the above solution: the vertical plate is set in a cross shape, which can improve the overall stability of the lifting device for the operator.
[0013] Preferably, the pressure plate is made of the same material as the leak detection cylinder.
[0014] As a further description of the above solution: the pressure plate is made of the same material as the leak detection cylinder, which facilitates the observation of the leaking parts of the packaging bag.
[0015] Preferably, the pressure plate has uniformly distributed through holes.
[0016] As a further description of the above solution: the pressure plate has evenly distributed through holes, which facilitates pressing the packaging bag into the water.
[0017] In summary, compared with the prior art, the beneficial effects of this utility model are as follows: by setting up a leak detection cylinder, top cover, vertical plate, handle one, pressure plate, suction pipe, valve, suction cylinder, piston plate, movable rod, handle two, frame, mounting port, spring, fixing block, and the cooperation between the fixing port, the device can be easily operated and carried as a whole. It can perform sealing detection on packaging bags without power, effectively improving the flexibility of detection and making it highly practical. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a side view of the present invention. Figure 3 This is a front view of the structural structure of this utility model; Figure 4 This is a structural diagram of the leak testing cylinder and top cover of this utility model; Figure 5 This is a structural diagram of the top cover and pressure plate of this utility model; Figure 6 This is a structural diagram of the suction tube and valve of this utility model; Figure 7 This is a top sectional view of the handle of this utility model; Figure 8 This is a bottom view of the leak-measuring cylinder of this utility model.
[0019] Legend: 1. Leak test tube; 2. Top cover; 3. Vertical plate; 4. Handle 1; 5. Pressure plate; 6. Suction pipe; 7. Valve; 8. Suction cylinder; 9. Movable rod; 10. Handle 2; 11. Frame; 12. Mounting port; 13. Spring; 14. Fixing block; 15. Fixing port; 16. Bottom cover; 17. Handle 3; 18. Through hole. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figure 1-8 This utility model provides a technical solution: A portable leak testing device for packaging bags includes a leak testing cylinder 1, which is made of transparent plastic. A top cover 2 is threadedly connected to the top of the leak testing cylinder 1. A vertical plate 3 is slidably mounted in the middle of the top cover 2. A handle 4 is fixedly mounted at the top of the vertical plate 3, and a pressure plate 5 is fixedly mounted at the bottom of the vertical plate 3. An air extraction pipe 6 is fixedly connected to the top side of the leak testing cylinder 1. A valve 7 is installed inside the air extraction pipe 6, and an air extraction cylinder 8 is threadedly connected to the air extraction pipe 6. A piston disc is slidably mounted inside the air extraction cylinder 8, and a movable rod 9 is slidably mounted on the air extraction cylinder 8. The end of the movable rod 9... The piston disc is fixedly installed in the middle. A handle 10 is fixedly installed at the outer end of the movable rod 9. A frame 11 is fixedly installed on the side of the leak testing cylinder 1. The size of the handle 10 is adapted to the inner diameter of the frame 11. An installation port 12 is opened on the side of the handle 10. A spring 13 is installed in the installation port 12. A fixing block 14 is slidably installed on the installation port 12. The two ends of the spring 13 are fixedly installed to the handle 10 and the fixing block 14, respectively. A fixing port 15 is opened on the inner wall of the frame 11. The fixing block 14 and the fixing port 15 are set as matching arc surfaces.
[0022] When testing for leaks in a packaging bag, first fill the leak testing cylinder 1 with water. After filling with water, put the packaging bag into the water and then thread the top cover 2 onto the top of the leak testing cylinder 1 to close it. When the operator holds handle 4 and presses it down, the vertical plate 3 will slide down in the middle of the top cover 2, which will in turn move the pressure plate 5 down, and finally press the packaging bag into the water through the pressure plate 5. Then the operator holds handle 210 and pulls it, causing the movable rod 9 to slide on the air extraction cylinder 8. The movable rod 9 causes the piston plate to slide inside the air extraction cylinder 8. Using the principle of negative pressure, the air in the leak test cylinder 1 passes through the valve 7 in the air extraction tube 6 and is drawn into the air extraction cylinder 8, completing the construction of the negative pressure environment inside the leak test cylinder 1. By observing whether bubbles are generated in the water, the sealing condition of the packaging bag can be detected. The valve 7 setting can prevent gas backflow; When the entire device needs to be carried, the operator removes the suction cylinder 8 from the suction pipe 6 by threading it off and inserts the handle 10 into the frame 11 on the side of the leak test cylinder 1. During the insertion of the handle 10 into the frame 11, the fixing block 14 is compressed by the pressure, causing the spring 13 to enter the mounting port 12. When the mounting port 12 is aligned with the fixing port 15, the elastic restoring force of the spring 13 will lock the fixing block 14 into the fixing port 15, thus completing the disassembly and fixing of the suction cylinder 8. The operator can then carry the entire device by holding the handle 4. This packaging bag leak detection device is easy to operate and carry. It can perform seal tests on packaging bags without electricity, effectively improving the flexibility of the test and making it highly practical.
[0023] Mounting port 12, spring 13, fixing block 14, and fixing port 15 are arranged in two symmetrical sets; The mounting port 12, spring 13, fixing block 14, and fixing port 15 are arranged in two symmetrical sets, which can improve the stability of the suction cylinder 8 fixed on the side of the side leakage cylinder.
[0024] A bottom cover 16 is threaded to the middle of the bottom surface of the leak testing cylinder 1, and a handle 17 is provided on the bottom cover 16; After the leak test of the packaging bag is completed, when it is necessary to drain the water in the leak test cylinder 1, the operator holds the handle 3 17 on the bottom cover 16 with the threaded connection in the middle of the bottom surface of the leak test cylinder 1, and rotates the bottom cover 16 by applying force through the handle 3 17 to separate the bottom cover 16 from the threaded bottom surface of the leak test cylinder 1, opening the bottom opening of the leak test cylinder 1. The water in the leak test cylinder 1 can then be quickly drained through the bottom opening without tilting the entire device, improving the convenience of the drainage operation and saving time and effort.
[0025] Vertical plate 3 is set in a cross shape; The vertical plate 3 is designed in a cross shape, which has a more uniform force distribution compared to a regular straight plate, effectively improving the overall stability of the device when the operator is turning it.
[0026] The material of pressure plate 5 is the same as that of leak test cylinder 1; The pressure plate 5 is made of the same material as the leak test cylinder 1, which makes it easy to observe the leaking parts of the packaging bag.
[0027] The pressure plate 5 has evenly distributed through holes 18; The pressure plate 5 has evenly distributed through holes 18. During the pressing process, the water between the packaging bag and the pressure plate 5 can be discharged through the through holes 18, and water pressure will not be formed below the pressure plate 5 to hinder the pressure plate 5 from moving down, making it easier to press the packaging bag into the water.
[0028] Working principle: When testing for leaks in a packaging bag, first fill the leak testing cylinder 1 with water. After filling with water, put the packaging bag into the water and then thread the top cover 2 onto the top of the leak testing cylinder 1 to close it. When the operator holds handle 4 and presses it down, the vertical plate 3 will slide down in the middle of the top cover 2, which will in turn move the pressure plate 5 down, and finally press the packaging bag into the water through the pressure plate 5. Then the operator holds handle 210 and pulls it, causing the movable rod 9 to slide on the air extraction cylinder 8. The movable rod 9 causes the piston plate to slide inside the air extraction cylinder 8. Using the principle of negative pressure, the air in the leak test cylinder 1 passes through the valve 7 in the air extraction tube 6 and is drawn into the air extraction cylinder 8, completing the construction of the negative pressure environment inside the leak test cylinder 1. By observing whether bubbles are generated in the water, the sealing condition of the packaging bag can be detected. The valve 7 setting can prevent gas backflow; When the entire device needs to be carried, the operator removes the suction cylinder 8 from the suction pipe 6 by threading it off and inserts the handle 10 into the frame 11 on the side of the leak test cylinder 1. During the insertion of the handle 10 into the frame 11, the fixing block 14 is compressed by the pressure, causing the spring 13 to enter the mounting port 12. When the mounting port 12 is aligned with the fixing port 15, the elastic restoring force of the spring 13 will lock the fixing block 14 into the fixing port 15, thus completing the disassembly and fixing of the suction cylinder 8. The operator can then carry the entire device by holding the handle 4. This packaging bag leak detection device is easy to operate and carry. It can perform seal detection on packaging bags without electricity, effectively improving the flexibility of detection and making it highly practical. in, The mounting port 12, spring 13, fixing block 14, and fixing port 15 are set in two symmetrical sets, which can improve the stability of the suction cylinder 8 fixed on the side of the side leakage cylinder. When the leak test of the packaging bag is completed and the water in the leak test cylinder 1 needs to be drained, the operator holds the handle 3 17 on the bottom cover 16 with the threaded connection in the middle of the bottom surface of the leak test cylinder 1, and rotates the bottom cover 16 by applying force through the handle 3 17 to separate the bottom cover 16 from the threaded bottom surface of the leak test cylinder 1, opening the bottom opening of the leak test cylinder 1. The water in the leak test cylinder 1 can then be quickly drained through the bottom opening without having to tilt the entire device, improving the convenience of the drainage operation and saving time and effort. The vertical plate 3 is designed in a cross shape, which has a more uniform force distribution compared to a regular straight plate, effectively improving the overall stability of the device when the operator is turning it. The pressure plate 5 is made of the same material as the leak test cylinder 1, which makes it easy to observe the leaking parts of the packaging bag; The pressure plate 5 has evenly distributed through holes 18. During the pressing process, the water between the packaging bag and the pressure plate 5 can be discharged through the through holes 18, and water pressure will not be formed below the pressure plate 5 to hinder the pressure plate 5 from moving down, making it easier to press the packaging bag into the water.
[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A portable leak testing device for packaging bags, comprising a leak testing cylinder (1), characterized in that, The leak testing cylinder (1) is made of transparent plastic, and a top cover (2) is threadedly connected to the top of the leak testing cylinder (1). A vertical plate (3) is slidably arranged in the middle of the top cover (2). A handle (4) is fixedly installed at the top of the vertical plate (3). A pressure plate (5) is fixedly installed at the bottom of the vertical plate (3). An air extraction pipe (6) is fixedly connected to the top side of the leak testing cylinder (1). A valve (7) is provided inside the air extraction pipe (6), and an air extraction cylinder (8) is threadedly connected to the air extraction pipe (6). A piston disc is slidably arranged inside the air extraction cylinder (8), and a movable rod (9) is slidably arranged on the air extraction cylinder (8). The end of the movable rod (9) is fixedly installed in the middle of the piston disc. The movable rod (9) is fixedly installed with a handle two (10) at its outer end. The leak test cylinder (1) is fixedly installed with a frame (11) on its side. The size of the handle two (10) is adapted to the inner diameter of the frame (11). The handle two (10) has an installation port (12) on its side. A spring (13) is installed in the installation port (12), and a fixing block (14) is slidably installed on the installation port (12). The two ends of the spring (13) are fixedly installed with the handle two (10) and the fixing block (14) respectively. The inner wall of the frame (11) has a fixing port (15). The fixing block (14) and the fixing port (15) are set as matching arc surfaces.
2. The portable leak detection device for packaging bags according to claim 1, characterized in that, The mounting port (12), spring (13), fixing block (14), and fixing port (15) are arranged in two symmetrical sets.
3. The portable leak detection device for packaging bags according to claim 1, characterized in that, The leak test cylinder (1) has a bottom cover (16) threadedly connected to the middle of its bottom surface, and a handle (17) is provided on the bottom cover (16).
4. The portable leak detection device for packaging bags according to claim 1, characterized in that, The vertical plate (3) is configured in a cross shape.
5. A portable leak detection device for packaging bags according to claim 1, characterized in that, The pressure plate (5) is made of the same material as the leak test cylinder (1).
6. A portable leak detection device for packaging bags according to claim 1, characterized in that, The pressure plate (5) has uniformly distributed through holes (18).