Liquid bag air tightness detection equipment

Abstract

The utility model provides liquid bag air tightness detection equipment, which belongs to the technical field of liquid bag production and comprises a working table, supporting arms are arranged on two sides of the working table, a rotating base is mounted on the supporting arms through a servo motor, four groups of air nozzles are arranged on the rotating base, and the four groups of air nozzles are arranged on the working table. Each group of air taps is connected with an air supply system, two groups of sealing rubber rings are arranged on the outer sides of the air taps, pressure sensors are mounted on the air taps, an extrusion bin is further arranged on the working table, an opening is formed in the top end of the extrusion bin, and the opening is used for enabling a liquid bag to be detected to enter the extrusion bin to be subjected to an extrusion test. The two sides of the interior of the extrusion bin are each connected with an electric grinding roller through a driving displacement mechanism, and the bottom ends of the electric grinding rollers are connected with the driving displacement mechanisms; according to the utility model, the problem of low liquid bag airtightness detection efficiency at the present stage can be solved.

Description

Technical Field

[0001] This utility model belongs to the field of liquid bag production technology, specifically, it relates to a liquid bag airtightness testing device. Background Technology

[0002] In modern industrial production and logistics transportation, liquid bags are widely used for the storage and transportation of various liquid products. For example, in industries such as chemical raw materials, food and beverage, and pharmaceutical preparations, liquid bags have become an important liquid packaging container due to their advantages such as light weight, low cost, foldability, and strong adaptability.

[0003] Currently, there are several common methods for testing the airtightness of liquid bags. One relatively traditional method is to seal the liquid bag and immerse it in water, then observe whether bubbles emerge to determine its airtightness. While this method is intuitive, it has several drawbacks. First, the testing process is cumbersome, requiring a large amount of water and appropriate immersion equipment, as well as a large operating space. Second, this method is completely unsuitable for liquid bag contents that are sensitive to moisture or for cases where the bag material itself should not be exposed to water, as it may damage the bag or contaminate the contents. Furthermore, this method of manually observing bubbles is inefficient, and the accuracy of the test largely depends on the operator's experience and attention, making it prone to misjudgments and missed detections. Utility Model Content

[0004] In view of this, the present invention provides a liquid bag airtightness testing device, which can solve the problem of low efficiency in the current liquid bag airtightness testing.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a liquid bag airtightness testing device, which includes a workbench with support arms on both sides. A rotating base is mounted on the support arms via a servo motor. Four sets of air nozzles are mounted on the rotating base, each set of air nozzles being connected to a gas supply system. Two sets of sealing rings are provided on the outside of each air nozzle, and a pressure sensor is mounted on each air nozzle. A squeezing chamber is also provided on the workbench, with an opening at the top of the squeezing chamber for the liquid bag to be tested to enter the squeezing chamber for squeezing testing. The two sides inside the squeezing chamber are connected to electric rollers via a set of drive displacement mechanisms. The bottom end of the electric roller is connected to the drive displacement mechanism, and the top end of the electric roller is movably connected to a guide groove inside the squeezing chamber via a guide slider. The drive displacement mechanism includes a groove, a slide block, a forward and reverse motor, and a lead screw.

[0007] The technical effects of the liquid bag airtightness testing device provided by this utility model are as follows: A workbench provides the installation foundation, and a support arm is used to install the rotating base, providing support and load-bearing capacity, ensuring stable rotation. The rotating base and servo motor allow for precise control of the base's rotation angle and speed. Rotating the base allows the liquid bag to be tested, fixed above the air nozzle, to enter the squeezing chamber. An air nozzle is used to fill the liquid bag with testing gas. A sealing ring forms a sealed cavity with the inner wall of the bag opening, preventing gas leakage from the connection between the air nozzle and the bag opening, ensuring complete filling. A pressure sensor detects pressure changes inside the bag. The squeezing chamber uses electric rollers on both sides to squeeze the inflated bag. The rotation during squeezing further reduces friction on the bag surface, preventing damage.

[0008] Based on the above technical solution, the liquid bag airtightness testing device of this utility model can be further improved as follows:

[0009] Each set of gas nozzles is connected to the gas supply system through a separate gas channel. The gas supply system includes a gas source, a gas filter, a pressure reducing valve, and a flow controller. The gas channel is equipped with a separate control valve and the flow controller. The gas filter and the pressure reducing valve are located at the output end of the gas source.

[0010] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting a flow controller and a control valve, when injecting detection gas into the liquid bag, the flow controller can ensure that the gas is injected into the liquid bag to be tested at a stable speed through the gas nozzle.

[0011] Furthermore, a sealing cavity is formed between the two sets of sealing rings and the inner wall of the liquid bag opening, and an air hole is provided on the air nozzle corresponding to the position of the sealing cavity.

[0012] Furthermore, the inner wall of the air nozzle is provided with a boss, the pressure sensor is fixedly installed above the boss, and multiple sets of air holes are arranged around the bottom outer periphery of the boss, the air holes being used to output gas from the gas channel.

[0013] Furthermore, the fixed end of the servo motor is fixedly connected to one side of the support arm, the output shaft of the servo motor is fixedly connected to one side of the rotating base, and a rotating shaft is fixedly connected to the other side of the rotating base. The rotating shaft is rotatably connected to the coupling seat on the other side of the support arm.

[0014] Furthermore, the slide grooves are respectively opened on both sides of the bottom wall inside the extrusion chamber, the slide block is slidably disposed inside the slide groove, the left and right sides of the slide block are provided with limit sliders, the inside sides of the slide groove are provided with limit slide grooves adapted to the limit sliders, and the limit sliders and the slide block are integral structures.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting limit sliders on both sides to cooperate with the limit slide groove inside the slide groove, the stability and directionality of the slide block movement are ensured, and deviation during the movement is avoided, thereby ensuring that the electric roller can stably apply extrusion force to the liquid bag.

[0016] Furthermore, the forward and reverse motor is disposed at one end of the inner side of the slide groove, the output end of the forward and reverse motor is fixedly connected to one end of the lead screw, the other end of the lead screw is rotatably connected to the coupling seat at the other end of the inner side of the slide groove, a through hole is provided in the middle of the slide seat, and a threaded structure adapted to the lead screw is provided on the inner wall of the through hole, and the slide seat is movably connected to the lead screw.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the forward and reverse motors are used to drive the lead screw to rotate, and at the same time, the slide block moves linearly in the slide groove. The horizontal displacement of the electric roller is controlled by this driving method.

[0018] Furthermore, the electric roller is driven by a motor, which is installed on the inner side of the bottom of the connecting frame, and the output end of the motor is fixedly connected to the electric roller.

[0019] Furthermore, a rotating shaft is fixedly connected above the electric roller, and the rotating shaft is rotatably connected to the coupling seat on the inner side of the top of the connecting frame.

[0020] Furthermore, the bottom of the connecting frame is fixedly connected to the top of the slide block, and the top of the connecting frame is fixedly connected to the guide slider.

[0021] Compared with existing technologies, the beneficial effects of the liquid bag airtightness testing device provided by this utility model are as follows: The workbench provides the installation foundation, and the support arm is used to install the rotating base, providing support and load-bearing capacity and a stable support point for the rotation of the rotating base, ensuring the stability of the rotation. By setting up the rotating base and a servo motor, the servo motor can precisely control the rotation angle and speed of the rotating base. By driving the rotating base to rotate, the liquid bag to be tested, fixed above the air nozzle, can enter the squeezing chamber. The air nozzle is used to fill the liquid bag with testing gas. A sealing ring is used to form a sealed cavity with the inner wall of the liquid bag opening. This sealing structure prevents the gas from leaking from the connection between the air nozzle and the liquid bag opening, ensuring that all the gas can be filled into the liquid bag. A pressure sensor is used to detect pressure changes inside the liquid bag. The squeezing chamber is used to squeeze the inflated liquid bag through electric rollers on both sides. Furthermore, the rotation during squeezing further reduces friction with the surface of the liquid bag, preventing damage to the bag surface. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a liquid bag airtightness testing device.

[0024] Figure 2 This is a top view of a liquid bag airtightness testing device;

[0025] Figure 3 This is a partial schematic diagram of the connection between the air nozzle and the liquid bag opening;

[0026] Figure 4 This is a schematic diagram of the structure of an electric roller;

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 10. Workbench; 11. Support arm; 12. Servo motor; 13. Rotating base; 14. Air nozzle; 15. Sealing ring; 16. Sealing cavity; 17. Air hole; 18. Extrusion chamber; 19. Pressure sensor; 20. Electric roller; 21. Slide groove; 22. Slide block; 23. Forward and reverse motor; 24. Lead screw; 25. Connecting frame. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0030] like Figure 1-4 The image shows an embodiment of a liquid bag airtightness testing device provided by this utility model. In this embodiment, a workbench 10 is provided, and support arms 11 are provided on both sides of the workbench 10. A rotating base 13 is mounted on the support arms 11 via a servo motor 12. Four sets of air nozzles 14 are provided on the rotating base 13. Each set of air nozzles 14 is connected to a gas supply system. Two sets of sealing rings 15 are provided on the outside of the air nozzles 14. A pressure sensor 19 is installed on the air nozzles 14. A squeezing chamber 18 is also provided on the workbench 10. An opening is provided at the top of the squeezing chamber 18 for the liquid bag to be tested to enter the squeezing chamber 18 for squeezing test. The two sides inside the squeezing chamber 18 are connected to an electric roller 20 via a set of drive displacement mechanisms. The bottom end of the electric roller 20 is connected to the drive displacement mechanism. The top end of the electric roller 20 is movably connected to the guide groove inside the squeezing chamber 18 via a guide slider. The drive displacement mechanism includes a groove 21, a slide block 22, a forward and reverse motor 23, and a lead screw 24.

[0031] The servo motor 12, the gas control system, and the forward and reverse motor 23 and electric roller 20 in the drive displacement mechanism are respectively connected to the control system. The control system includes a controller, a timer, and an alarm. The controller is used to output control signals according to the set values, such as the stop position of the servo motor 12 driving the rotating base 13 to rotate, the time for the gas nozzle 14 to inject gas into the liquid bag, and the control start and stop commands of the forward and reverse motor 23 and electric roller 20.

[0032] In the above technical solution, each set of gas nozzles 14 is connected to the gas supply system through a separate gas channel. The gas supply system includes a gas source, a gas filter, a pressure reducing valve, and a flow controller. The gas channel is equipped with a separate control valve and a flow controller. The gas filter and pressure reducing valve are located at the output end of the gas source.

[0033] The gas source can be an air compressor. When the gas supply system outputs gas to the nozzle 14, the pressure reducing valve first adjusts the high-pressure gas generated by the air compressor to the set pressure range, and then outputs it to the corresponding gas channel through the connecting pipeline. The flow controller, together with the control valve, accurately distributes the gas through the nozzle 14 according to the set flow value. Both the gas supply system and the gas channel are located inside the rotating base 13.

[0034] Furthermore, in the above technical solution, a sealing cavity 16 is formed between the two sets of sealing rubber rings 15 and the inner wall of the liquid bag opening, and an air hole 17 is opened at the position of the air nozzle 14 corresponding to the sealing cavity 16.

[0035] Furthermore, in the above technical solution, the inner wall of the nozzle 14 is provided with a boss, the pressure sensor 19 is fixedly installed on the boss, and multiple sets of air holes 17 are arranged around the bottom outer periphery of the boss. The air holes 17 are used to output gas from the gas channel.

[0036] Furthermore, in the above technical solution, the fixed end of the servo motor 12 is fixedly connected to one side support arm 11, the output shaft of the servo motor 12 is fixedly connected to one side of the rotating base 13, and a rotating shaft is fixedly connected to the other side of the rotating base 13. The rotating shaft is rotatably connected to the coupling seat on the other side support arm 11.

[0037] Furthermore, in the above technical solution, the slide grooves 21 are respectively opened on both sides of the bottom wall inside the extrusion chamber 18, the slide block 22 is slidably disposed inside the slide groove 21, the left and right sides of the slide block 22 are provided with limit sliders, the inside sides of the slide groove 21 are provided with limit slide grooves adapted to the limit sliders, and the limit sliders and the slide block 22 are an integral structure.

[0038] Furthermore, in the above technical solution, the forward and reverse motor 23 is disposed at one end of the inner side of the slide groove 21, the output end of the forward and reverse motor 23 is fixedly connected to one end of the lead screw 24, the other end of the lead screw 24 is rotatably connected to the coupling seat at the other end of the inner side of the slide groove 21, a through hole is provided in the middle of the slide seat 22, and a threaded structure adapted to the lead screw 24 is provided on the inner wall of the through hole, and the slide seat 22 is movably connected to the lead screw 24.

[0039] Furthermore, in the above technical solution, the electric roller 20 is driven by a motor, which is installed on the inner side of the bottom of the connecting frame 25, and the output end of the motor is fixedly connected to the electric roller 20.

[0040] Furthermore, in the above technical solution, a rotating shaft is fixedly connected above the electric roller 20, and the rotating shaft is rotatably connected to the coupling seat on the inner side of the top of the connecting frame 25.

[0041] Furthermore, in the above technical solution, the bottom of the connecting frame 25 is fixedly connected to the top of the slide block 22, and the top of the connecting frame 25 is fixedly connected to the guide slider.

[0042] Specifically, the principle of this utility model is as follows: First, the liquid bag to be tested is aligned and placed above the air nozzle 14, ensuring a tight connection between the air nozzle 14 and the opening of the liquid bag. Two sets of sealing rings 15 form a good sealing cavity with the inner wall of the liquid bag opening. The gas supply system is then turned on. The gas output from the gas source first passes through a gas filter to remove impurities, then is adjusted to a suitable pressure by a pressure reducing valve. Then, under the coordinated action of the flow controller and control valve, a fixed amount of gas is injected into the liquid bag through the air nozzle 14 at a stable flow rate. At this time, the pressure sensor 19 records the initial pressure value. Next, the servo motor 12 is started, driving the rotating base 13 to rotate, causing the liquid bag fixed on the air nozzle 14 to rotate accordingly. During the rotation, the pressure sensor 19 continuously monitors the pressure changes inside the liquid bag, simulating the tumbling state of the liquid bag during transportation and storage, comprehensively testing the airtightness at different angles. Afterwards, the rotated liquid bag undergoes further processing... The opening of the extrusion chamber 18 above the worktable 10 enters the extrusion chamber 18. At this time, the drive displacement mechanism on both sides inside the extrusion chamber 18 starts to work. The forward and reverse motor 23 drives the lead screw 24 to rotate. The slide block 22 moves linearly along the slide groove 21 on the lead screw 24, so that the connecting frame 25 connected to the slide block 22 drives the electric roller 20 to approach the liquid bag and squeeze the liquid bag. The electric roller 20 rotates under the drive of the motor. Its upper rotating shaft is rotated and connected to the coupling seat at the top of the connecting frame to ensure stability. During the extrusion process, the pressure sensor 19 monitors the pressure change inside the liquid bag in real time and judges the airtightness of the liquid bag when it is subjected to external extrusion by the pressure change.

Claims

1. A liquid bag airtightness testing device, characterized in that, The system includes a workbench (10), with support arms (11) on both sides. A rotating base (13) is mounted on each support arm (11) via a servo motor (12). Four sets of air nozzles (14) are mounted on the rotating base (13), each nozzle (14) being connected to a gas supply system. Two sets of sealing rings (15) are mounted on the outer side of each nozzle (14). A pressure sensor (19) is mounted on each nozzle (14). The workbench (10) also includes a compression chamber (18). 18) An opening is provided at the top, which is used to allow the liquid bag to be tested to enter the squeezing chamber (18) for squeezing test. The two sides inside the squeezing chamber (18) are respectively connected to the electric roller (20) through a set of driving displacement mechanisms. The bottom end of the electric roller (20) is connected to the driving displacement mechanism. The top end of the electric roller (20) is movably connected to the guide slide inside the squeezing chamber (18) through the guide slider. The driving displacement mechanism includes a slide (21), a slide block (22), a forward and reverse motor (23), and a lead screw (24).

2. The liquid bag airtightness testing device according to claim 1, characterized in that, Each of the gas nozzles (14) is connected to the gas supply system through a separate gas channel. The gas supply system includes a gas source, a gas filter, a pressure reducing valve, and a flow controller. The gas channel is equipped with a separate control valve and the flow controller. The gas filter and the pressure reducing valve are located at the output end of the gas source.

3. The liquid bag airtightness testing device according to claim 2, characterized in that, The two sets of sealing rings (15) form a sealing cavity (16) with the inner wall of the liquid bag opening, and the air nozzle (14) has an air hole (17) corresponding to the sealing cavity (16).

4. The liquid bag airtightness testing device according to claim 3, characterized in that, The inner wall of the nozzle (14) is provided with a boss, and the pressure sensor (19) is fixedly installed above the boss. Multiple sets of air holes (17) are arranged around the bottom outer periphery of the boss. The air holes (17) are used to output gas from the gas channel.

5. The liquid bag airtightness testing device according to claim 4, characterized in that, The fixed end of the servo motor (12) is fixedly connected to the support arm (11) on one side. The output shaft of the servo motor (12) is fixedly connected to one side of the rotating base (13). A rotating shaft is fixedly connected to the other side of the rotating base (13). The rotating shaft is rotatably connected to the coupling seat on the support arm (11) on the other side.

6. The liquid bag airtightness testing device according to claim 5, characterized in that, The slid grooves (21) are respectively opened on both sides of the bottom wall inside the extrusion chamber (18). The slide block (22) is slidably disposed inside the slid groove (21). Limiting sliders are provided on the left and right sides of the slide block (22). Limiting slid grooves adapted to the limiting sliders are provided on both sides inside the slid groove (21). The limiting sliders and the slide block (22) are an integral structure.

7. The liquid bag airtightness testing device according to claim 6, characterized in that, The reversible motor (23) is located at one end of the inner side of the slide groove (21). The output end of the reversible motor (23) is fixedly connected to one end of the lead screw (24). The other end of the lead screw (24) is rotatably connected to the coupling seat at the other end of the inner side of the slide groove (21). A through hole is provided in the middle of the slide seat (22). The inner wall of the through hole is provided with a thread structure adapted to the lead screw (24). The slide seat (22) is movably connected to the lead screw (24).

8. The liquid bag airtightness testing device according to claim 7, characterized in that, The electric roller (20) is driven by a motor, which is installed on the inner side of the bottom of the connecting frame (25), and the output end of the motor is fixedly connected to the electric roller (20).

9. The liquid bag airtightness testing device according to claim 8, characterized in that, A rotating shaft is fixedly connected above the electric roller (20), and the rotating shaft is rotatably connected to the coupling seat on the inner side of the top of the connecting frame (25).

10. The liquid bag airtightness testing device according to claim 9, characterized in that, The bottom of the connecting frame (25) is fixedly connected to the top of the slide (22), and the top of the connecting frame (25) is fixedly connected to the guide slider.

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