A sealing detection device for a zip bag

Abstract

The utility model provides a zip bag's leakproofness detection equipment relates to sealed detection technical field, including detection inner storehouse, the pressing type leakproofness detection subassembly includes the hydraulic support of installation on the detection inner storehouse upside, the middle installation of hydraulic support has hydraulic pump stem, the end of hydraulic pump stem is installed with the pressing plate, the inside of detection inner storehouse is provided with zip bag body, and hydraulic pump stem promotes the pressing plate to go down, and zip bag body after inflating is pressed tightly on the surface of force pressing plate, thereby generates the down pressure, and hydraulic pump stem will maintain this pressure for a period of time to simulate the extrusion state in actual use, in order to reach the effect of extrusion type sealed detection, and along with the pressing plate down pressure, the pressing plate and zip bag body middle have the protection pad of rubber material to serve as the buffer, and the protection pad of rubber material can increase the friction between the pressing plate and zip bag body, avoid zip bag body to appear the sliding after being pressed, lead to the deviation of data.

Description

Technical Field

[0001] This utility model relates to the field of sealing detection technology, and in particular to a sealing detection device for zipper bags. Background Technology

[0002] Zipper bags are flexible packaging with reusable zippers, commonly used for storing food, daily necessities, etc. They are convenient to access and reseal. The airtightness test verifies whether there is any leakage at the seal and zipper. By simulating usage scenarios or by pressurizing and vacuuming, the test checks for liquid and air leakage to ensure that the contents are protected from moisture and contamination and to ensure safe storage.

[0003] A search revealed that the document with publication number "CN219474877U" states that "this utility model relates to the technical field of sealing test equipment, specifically a sealing test equipment, including a base and a worktable. The worktable is fixedly installed on the upper surface of the base, a telescopic rod is fixedly installed on the surface of the base, a top plate is fixedly installed at one end of the telescopic rod, an air pump is fixedly installed on the surface of the top plate, and sealing gaskets are fixedly installed on the surfaces of both the top plate and the worktable. There are two sets of sealing gaskets, and a clamping block is slidably connected to the surface of the worktable." In use, this utility model, through the design of the limiting ring, sealing gaskets, and clamping block, incorporates two sets of sealing gaskets: one set is fixed to the surface of the worktable, and the other set can move up and down with the top plate. The clamping block is installed on the surface of the worktable and can slide freely. This design allows the equipment to test workpieces of different sizes while maintaining the airtightness of the workpiece during the testing process.

[0004] When testing the sealing performance of zipper bags, water immersion and vacuum attenuation methods are commonly used. However, these two methods are cumbersome to operate and require long-term manual observation. Conventional air injection testing relies on natural air leakage, which takes a long time and has low sensitivity, making it difficult to accurately identify minute leaks.

[0005] Therefore, we provide a sealing performance testing device for zipper bags to solve the above problems. Utility Model Content

[0006] To achieve the above objectives, this utility model provides the following technical solution: A sealing performance testing device for zipper bags includes a testing chamber. A press-type sealing performance testing component is installed inside the testing chamber. The press-type sealing performance testing component includes a hydraulic support mounted on the upper side of the testing chamber, a hydraulic pump rod installed in the middle of the hydraulic support, and a pressing plate installed at the end of the hydraulic pump rod. A zipper bag body is located inside the testing chamber. A test support plate is welded to the lower side of the testing chamber. Electromagnetic force damping devices are installed on the outer sides of the test support plate. A force-bearing pressure plate is installed at the upper end of the electromagnetic force damping devices. A pressure sensing controller is installed on the left side of the testing chamber, and a zipper bag air injection component is located on the left side of the testing chamber.

[0007] As a further description of the above technical solution: The pressing plate and the hydraulic pump rod are welded together. The hydraulic support and the pressing plate form a telescopic structure through the hydraulic pump rod. The hydraulic pump rod drives the pressing plate to press down on the zipper bag.

[0008] As a further description of the above technical solution: A protective pad made of rubber is adhered to the lower surface of the pressing plate and is tightly attached to the surface of the zipper bag.

[0009] As a further description of the above technical solution: The zippered bag body is located between the pressure plate and the pressing plate. The electromagnetic force damping senses the downward pressure on the zippered bag body through the pressure plate. The electromagnetic force damping is electrically connected to the pressure sensing controller. The electromagnetic force damping is arranged in four symmetrical groups.

[0010] As a further description of the above technical solution: An infrared air leakage sensor is installed on the inner wall of the detection compartment. The infrared air leakage sensor is an infrared air curtain sensor, and the infrared air leakage sensor surrounds the outside of the zipper bag.

[0011] As a further description of the above technical solution: The zipper bag air injection assembly includes an air supply pump body installed on the left side of the inner chamber of the test chamber. An air guide pipe is connected to the outside of the air supply pump body, and an air injection nozzle is installed at the end of the air guide pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses a press-type sealing test component. When needed, the hydraulic pump rod pushes the press plate downward, pressing the inflated zipper bag body tightly against the surface of the pressure plate, thereby generating downward pressure. The hydraulic pump rod maintains this pressure for a period of time to simulate the squeezing state in actual use, thus achieving the effect of squeezing-type sealing test. As the press plate is pressed down, there is a rubber protective pad between the press plate and the zipper bag body as a buffer. The rubber protective pad can increase the friction between the press plate and the zipper bag body, preventing the zipper bag body from sliding after being compressed, which would cause data deviation.

[0013] 2. This utility model uses a press-type sealing detection component. As the press plate presses down on the zipper bag, the zipper bag exerts pressure on the pressure plate. The pressure plate then transmits the pressure to four symmetrically distributed electromagnetic force dampers. The internal electromagnetic induction element accurately captures the pressure value and transmits it to the pressure sensing controller in real time. If the pressure sensing controller detects a value that remains unchanged for a period of time, it indicates a qualified sealing state. However, if there is a significant change, it indicates that the zipper bag is leaking or has a poor seal. The severity of the sealing defect is determined based on the magnitude of the value change. If there is a gas leak, the infrared leak sensor will detect the air injected by the air injection nozzle. Since the injected air is hot air, the infrared leak sensor will detect the gas leak point. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the detection chamber of this utility model; Figure 3 This is a bottom view of the internal detection chamber of this utility model. Figure 4 This is a bottom view of the pressing plate and protective pad of this utility model.

[0015] The following are the labeling elements in the diagram: 1. Inner chamber for testing; 2. Press-type sealing test assembly; 201. Hydraulic support; 202. Hydraulic pump rod; 203. Pressing plate; 204. Protective pad; 205. Zipper bag body; 206. Test support plate; 207. Electromagnetic force damping; 208. Force plate; 209. Pressure sensor controller; 210. Infrared air leakage sensor; 3. Zipper bag air injection assembly; 301. Air supply pump body; 302. Air guide pipe; 303. Air injection nozzle. Detailed Implementation

[0016] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-4 As shown, this utility model provides a technical solution: a zipper bag sealing performance testing device, including a testing inner chamber 1, a press-type sealing performance testing component 2 disposed on the inner side of the testing inner chamber 1, the press-type sealing performance testing component 2 including a hydraulic support 201 installed on the upper side of the testing inner chamber 1, a hydraulic pump rod 202 installed in the middle of the hydraulic support 201, a pressing plate 203 installed at the end of the hydraulic pump rod 202, a zipper bag body 205 disposed on the inner side of the testing inner chamber 1, a test support plate 206 welded to the lower side of the testing inner chamber 1, electromagnetic force damping 207s installed on the outer side of the test support plate 206, a force-bearing pressure plate 208 installed at the upper end of the electromagnetic force damping 207s, a pressure sensing controller 209 disposed on the left side of the testing inner chamber 1, and a zipper bag air injection component 3 disposed on the left side of the testing inner chamber 1.

[0018] Furthermore, the pressing plate 203 and the hydraulic pump rod 202 are welded together. The hydraulic support 201 and the pressing plate 203 form a telescopic structure through the hydraulic pump rod 202. The hydraulic pump rod 202 drives the pressing plate 203 to press down on the zipper bag body 205. When needed, the hydraulic pump rod 202 pushes the pressing plate 203 downward, pressing the inflated zipper bag body 205 tightly against the surface of the pressure plate 208, thereby generating downward pressure. The hydraulic pump rod 202 will maintain this pressure for a period of time to simulate the squeezing state in actual use, thereby achieving the effect of squeezing-type sealing detection.

[0019] Furthermore, a protective pad 204 is adhered to the lower surface of the pressing plate 203. The protective pad 204 is made of rubber and fits tightly against the surface of the zipper pocket 205. When needed, as the pressing plate 203 is pressed down, the rubber protective pad 204 between the pressing plate 203 and the zipper pocket 205 acts as a buffer. The rubber protective pad 204 can also increase the friction between the pressing plate 203 and the zipper pocket 205, preventing the zipper pocket 205 from sliding after being pressed, which could lead to data deviation.

[0020] Furthermore, the zippered bag body 205 is located between the pressure plate 208 and the pressing plate 203. The electromagnetic force damper 207 senses the downward pressure on the zippered bag body 205 through the pressure plate 208. The electromagnetic force damper 207 is electrically connected to the pressure sensing controller 209. The electromagnetic force dampers 207 are arranged in four symmetrical groups. When needed, as the pressing plate 203 presses down on the zippered bag body 205, the zippered bag body 205 will exert pressure on the pressure plate 208 after being subjected to force. At this time, the pressure plate 208 transmits the pressure to the four symmetrically distributed electromagnetic force dampers 207. The pressure value is accurately captured by the internal electromagnetic induction element and transmitted to the pressure sensing controller 209 in real time. When the pressure sensing controller 209 senses a value that remains unchanged for a period of time, it is considered to be in a qualified sealing state. However, if there is a significant change, it indicates that the zippered bag body 205 has air leakage or poor sealing. The severity of the sealing defect is determined according to the magnitude of the value change.

[0021] Furthermore, an infrared air leak sensor 210 is installed on the inner wall of the inner compartment 1. The infrared air leak sensor 210 is an infrared air curtain sensor. The infrared air leak sensor 210 surrounds the outer side of the zipper bag 205. When it is needed, if there is a gas leak, the infrared air leak sensor 210 will sense the air injected by the air injection nozzle 303. The injected air itself is hot air, so the infrared air leak sensor 210 will detect the gas leak point.

[0022] Furthermore, the zipper bag air injection assembly 3 includes an air supply pump body 301 installed on the left side of the detection inner compartment 1. An air guide pipe 302 is connected to the outside of the air supply pump body 301, and an air injection nozzle 303 is installed at the end of the air guide pipe 302. When needed, the air supply pump body 301 sprays hot air through the air guide pipe 302 from the air injection nozzle 303. At this time, the hot air sprayed from the air injection nozzle 303 will be injected into the zipper bag body 205, and then manually sealed, thereby achieving the purpose of air injection.

[0023] Working principle: When needed, place the inner testing compartment 1 in the desired position, then place the zipper bag 205 on the upper surface of the pressure plate 208. After placement, the operator inserts the air injection nozzle 303 into the zipper bag 205. The air supply pump 301 injects hot air into the zipper bag 205 through the air guide pipe 302 via the air injection nozzle 303. Then, the bag is manually sealed. After sealing, the hydraulic pump rod 202 in the hydraulic support 201 pushes the pressing plate 203 downward until the protective pad 204 under the pressing plate 203 contacts the upper surface of the zipper bag 205. It then continues to press down slightly, causing the zipper bag 205 to transmit pressure downward to the pressure plate 208. The pressure plate 208... When subjected to pressure, the electromagnetic force damper 207 will generate pressure, and the data of the electromagnetic force damper 207 will be transmitted to the pressure sensing controller 209 in real time. After pressing down for a certain period of time, the appropriate time is 5 to 10 seconds. Observe whether the data of the pressure sensing controller 209 fluctuates. If there is fluctuation, it indicates that there is air leakage. If there is no fluctuation, it indicates that the sealing effect is good. If there is air leakage, the infrared air leakage sensor 210 will observe the direction of air leakage in the zipper bag 205 in real time. Since the leaked gas is hot air, the infrared air leakage sensor 210 will sense the approximate direction of air leakage. Finally, after the test is completed, the zipper bag 205 is taken out. This completes the use process of a zipper bag sealing test device.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing performance testing device for zipper bags, comprising a testing inner chamber (1), characterized in that: The inner side of the inner chamber (1) is provided with a press-type sealing test component (2). The press-type sealing test component (2) includes a hydraulic support (201) installed on the upper side of the inner chamber (1). A hydraulic pump rod (202) is installed in the middle of the hydraulic support (201). A pressing plate (203) is installed at the end of the hydraulic pump rod (202). A zipper bag (205) is provided on the inner side of the inner chamber (1). A test support plate (206) is welded to the lower side of the inner chamber (1). Electromagnetic force damping (207) is installed on the outer side of the test support plate (206). A force-bearing pressure plate (208) is installed at the upper end of the electromagnetic force damping (207). A pressure sensing controller (209) is installed on the left side of the inner chamber (1). A zipper bag air injection component (3) is provided on the left side of the inner chamber (1).

2. The sealing performance testing device for zipper bags according to claim 1, characterized in that, The pressing plate (203) and the hydraulic pump rod (202) are welded together. The hydraulic support (201) and the pressing plate (203) form a telescopic structure through the hydraulic pump rod (202). The hydraulic pump rod (202) drives the pressing plate (203) to press down on the zipper bag body (205).

3. The sealing performance testing device for zipper bags according to claim 1, characterized in that, A protective pad (204) is adhered to the lower surface of the pressing plate (203). The protective pad (204) is made of rubber and is tightly attached to the surface of the zipper bag body (205).

4. The sealing performance testing device for zipper bags according to claim 1, characterized in that, The zippered bag body (205) is located between the pressure plate (208) and the pressing plate (203). The electromagnetic force damper (207) senses the downward pressure of the zippered bag body (205) through the pressure plate (208). The electromagnetic force damper (207) is electrically connected to the pressure sensing controller (209). The electromagnetic force damper (207) is arranged in four symmetrical groups.

5. The sealing performance testing device for zipper bags according to claim 1, characterized in that, An infrared air leakage sensor (210) is installed on the inner wall of the inner detection compartment (1). The infrared air leakage sensor (210) is an infrared air curtain sensor. The infrared air leakage sensor (210) surrounds the outer side of the zipper bag body (205).

6. The sealing performance testing device for zipper bags according to claim 1, characterized in that, The zipper bag air injection assembly (3) includes an air supply pump body (301) installed on the left side of the detection inner chamber (1), an air guide pipe (302) connected to the outside of the air supply pump body (301), and an air injection nozzle (303) installed at the end of the air guide pipe (302).

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