Air tightness leak detection device

Abstract

The utility model belongs to the technical field of air tightness leak detection, and particularly relates to an air tightness leak detection device, which comprises a workbench, a lower mold used for placing a medical injection molding part is arranged on the workbench, an upper mold is arranged above the lower mold, and a driving mechanism used for driving the lower mold to move on the workbench is arranged on one side of the lower mold. A lifting mechanism used for driving the upper mold to ascend and descend is arranged at the top of the upper mold, a gas inlet pipeline is connected to the lower mold, a gas detection mechanism is connected to the upper mold, when a medical injection molding part is placed on the lower mold, the upper mold is pressed downwards to fix the medical injection molding part, and at the moment, gas is blown into the lower mold; whether the medical injection-molded part leaks gas or not is detected through the gas detection mechanism on the upper mold, gas is blown into the sealed space through the sealed space formed by downward pressing of the upper mold and the gas inlet pipeline of the lower mold, whether the medical injection-molded part leaks gas or not is detected through the gas sensor of the upper mold, corresponding treatment is conducted according to the detection result, and operation is easy, convenient and fast.

Description

Technical Field

[0001] This utility model belongs to the field of airtightness leak detection technology, specifically relating to an airtightness leak detection device. Background Technology

[0002] In the medical field, many injection-molded parts, such as infusion bags, ventilator components, and medical plastic ampoules, require excellent airtightness. Due to the special nature of medical devices, their sterile and dust-free requirements necessitate maintaining a sealed state during packaging and transportation. If the packaging bag or injection-molded part leaks, it not only hinders the storage of the internal medication but also makes patients more susceptible to bacterial contamination during use, potentially leading to medical accidents.

[0003] While some leak detection devices exist on the market, they may suffer from problems such as lack of self-sterilization, low detection efficiency, and complex operation. For example, some leak detection devices for medical packaging bags may expose the bags to external bacteria while performing leak detection. Moreover, most existing leak detection devices are complex in structure, expensive, and require complicated operation, failing to meet the high-efficiency testing needs of assembly line production. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an airtightness leak detection device. A medical injection molded part is placed on a lower mold, and air is blown into the sealed space formed by the downward pressure of the upper mold through the air inlet pipe of the lower mold. A gas sensor in the upper mold detects whether the medical injection molded part is leaking, and appropriate actions are taken based on the detection results. This solves the problems that most existing airtightness detection devices are complex in structure, high in cost, and have complicated operation processes, failing to meet the high-efficiency detection needs of assembly line production.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an airtightness leak detection device, comprising a worktable, a lower mold for placing a medical injection molded part on the worktable, an upper mold above the lower mold, a drive mechanism for moving the lower mold on one side of the lower mold on the worktable, a lifting mechanism for lifting the upper mold at the top of the upper mold, an air inlet pipe connected to the lower mold, and a gas detection mechanism connected to the upper mold. When the medical injection molded part is placed on the lower mold, the upper mold presses down to fix the medical injection molded part, and air is blown into the lower mold. The gas detection mechanism on the upper mold is used to detect whether the medical injection molded part leaks air.

[0006] Preferably, the lower mold includes a fixed seat that is slidably connected to the worktable. The fixed seat is provided with a storage groove that matches the bottom outline of the medical injection molded part. The storage groove is provided with connecting posts that match all the hollow tubes inside the medical injection molded part. Each connecting post is connected to an air intake pipe.

[0007] Preferably, the driving mechanism includes a drive motor mounted on the worktable, and the output end of the drive motor is fixedly connected to one side of the fixed base of the lower mold.

[0008] Preferably, a sliding groove is provided on the worktable, and a sliding block matching the sliding groove is provided at the bottom of the fixed seat.

[0009] Preferably, the upper mold includes a base, the bottom of which is provided with a pressing and fixing groove that matches the top outline of the medical injection molded part. The interior of the pressing and fixing groove is provided with air vents that correspond sequentially to the connecting columns, and all air vents are provided with airflow sensors.

[0010] Preferably, the lifting mechanism includes a mounting frame set on the workbench, and a cylinder is provided on the mounting frame. The output end of the cylinder is fixedly connected to the top of the base of the upper mold.

[0011] Preferably, a detection panel is provided on the workbench.

[0012] Preferably, the workbench is equipped with control buttons and an alarm light.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: the medical injection molded part is placed on the lower mold, and the sealed space is formed by the pressure of the upper mold. The air inlet pipe of the lower mold blows air into the sealed space. The gas sensor of the upper mold detects whether the medical injection molded part is leaking air, and takes corresponding measures according to the detection results. The operation is simple and convenient, and it can efficiently detect the air tightness of the medical injection molded part.

[0014] Additional aspects and advantages of this utility model application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this utility model application. Attached Figure Description

[0015] Figure 1 A schematic diagram of the three-dimensional structure of an airtight leak detection device. Figure 1 .

[0016] Figure 2 A schematic diagram of the three-dimensional structure of an airtight leak detection device. Figure 2 .

[0017] Figure 3 This is a cross-sectional view of an airtight leak detection device.

[0018] Figure 43D structural breakdown of a mold for an airtight leak detection device Figure 1 .

[0019] Figure 5 3D structural breakdown of a mold for an airtight leak detection device Figure 2 .

[0020] In the diagram: 1. Workbench; 11. Sliding groove; 2. Lower mold; 21. Fixed base; 211. Sliding block; 22. Storage slot; 23. Connecting column; 3. Upper mold; 31. Base; 32. Lower pressing fixed groove; 33. Air vent; 4. Drive mechanism; 41. Drive motor; 5. Lifting mechanism; 51. Mounting bracket; 52. Cylinder; 6. Medical injection molded part; 7. Detection panel; 8. Control button; 9. Alarm light. Detailed Implementation

[0021] The embodiments of this utility model application will be described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model application, but should not be used to limit the scope of this utility model application. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model application.

[0022] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an airtightness leak detection device includes a workbench 1, on which a lower mold 2 for placing a medical injection molded part 6 is provided. An upper mold 3 is provided above the lower mold 2. A drive mechanism 4 for moving the lower mold 2 on the workbench 1 is provided on one side of the lower mold 2. A lifting mechanism 5 for lifting the upper mold 3 is provided on the top of the upper mold 3. An air inlet pipe is connected to the lower mold 2, and a gas detection mechanism is connected to the upper mold 3. When the medical injection molded part 6 is placed on the lower mold 2, the upper mold 3 presses down to fix the medical injection molded part 6. At this time, air is blown into the lower mold 2, and the gas detection mechanism on the upper mold 3 detects whether the medical injection molded part 6 leaks air.

[0023] This invention proposes an airtightness leak detection device. The workbench 1 serves as the basic support platform for the entire device, providing a location for the installation and operation of other components. The lower mold 2 is mounted on the workbench 1 and is used to place the medical injection molded part 6 to be tested. An air inlet pipe is connected to the lower mold 2, which introduces gas into the mold for airtightness testing. The upper mold 3 is located above the lower mold 2. A gas detection mechanism is connected to the upper mold 3, which detects the gas state inside the mold and around the medical injection molded part 6 to determine whether the part is leaking.

[0024] The drive mechanism 4 is installed on one side of the lower mold 2. The function of the drive mechanism 4 is to drive the lower mold 2 to move on the worktable 1, facilitating the placement and removal of the medical injection molded part 6 and adjusting the relative position of the lower mold 2 and the upper mold 3. The lifting mechanism 5 is located on top of the upper mold 3. The lifting mechanism 5 is used to drive the upper mold 3 to perform lifting movements, enabling the upper mold 3 to press down and fix the medical injection molded part 6 placed on the lower mold 2, and to rise and reset after testing. The medical injection molded part 6, the object to be tested for airtightness, is placed on the lower mold 2 for testing.

[0025] The lower mold 2 is moved to a suitable position on the worktable 1 by the drive mechanism 4, and the medical injection molded part 6 to be inspected is placed on the lower mold 2. The lifting mechanism 5 is activated, which drives the upper mold 3 to descend. The upper mold 3 presses down to cooperate with the lower mold 2, fixing the medical injection molded part 6 between the two and forming a relatively closed inspection space.

[0026] Gas is blown into the lower mold 2 through the air inlet pipe connected to the lower mold 2. After entering the lower mold 2, the gas fills the space around the medical injection molded part 6. At this time, the gas detection mechanism connected to the upper mold 3 starts to work, detecting the gas state in the space formed by the upper mold 3 and the lower mold 2. If the medical injection molded part 6 has an air leak, the gas detection mechanism will detect the relevant changes in gas leakage; if the medical injection molded part 6 has good airtightness, the gas detection mechanism will not detect any abnormal gas changes. After the detection is completed, the lifting mechanism 5 drives the upper mold 3 to rise and reset, and the driving mechanism 4 drives the lower mold 2 to move, so as to facilitate the removal of the medical injection molded part 6 after the detection is completed, and to carry out appropriate processing according to the detection results (such as qualified products proceeding to the next process, and unqualified products being reworked or scrapped, etc.).

[0027] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the lower mold 2 includes a fixed seat 21 that is slidably connected to the worktable 1. The fixed seat 21 is provided with a storage groove 22 that matches the bottom outline of the medical injection molded part 6. The storage groove 22 is provided with connecting posts 23 that match all the empty tubes inside the medical injection molded part 6. Each connecting post 23 is connected to an air intake pipe.

[0028] Specifically, the lower mold 2 includes a fixed base 21, which is slidably connected to the worktable 1. This allows the lower mold 2 to move on the worktable 1, facilitating the placement and removal of the medical injection molded part 6 and its operation in conjunction with other components.

[0029] The mounting base 21 is provided with a storage slot 22, the shape of which matches the bottom outline of the medical injection molded part 6. This ensures that the medical injection molded part 6 can be accurately placed in the storage slot 22, serving to position and initially fix it, and ensuring the stability of the medical injection molded part 6 during the testing process.

[0030] The storage slot 22 is equipped with multiple connecting posts 23, the number and position of which correspond to all the empty tubes inside the medical injection molded part 6. The size and shape of each connecting post 23 are also adapted to the empty tubes inside the medical injection molded part 6 so that it can be inserted into the empty tubes of the medical injection molded part 6 to achieve a good sealing connection.

[0031] Each connecting post 23 is internally connected to an air inlet pipe. The function of the air inlet pipe is to supply gas into the connecting post 23. When the connecting post 23 is inserted into the empty tube of the medical injection molded part 6, the gas can enter the empty tube inside the medical injection molded part 6 through the air inlet pipe, thereby providing a gas source for subsequent airtightness testing.

[0032] During the airtightness test, the lower mold 2 is first moved to a suitable position by the drive mechanism 4, and the medical injection molded part 6 is placed in the storage slot 22 of the fixed seat 21. At this time, the connecting post 23 inside the storage slot 22 will be inserted into the corresponding empty tube inside the medical injection molded part 6. Since the connecting post 23 cooperates with the empty tube, a good sealing effect can be achieved to prevent gas leakage.

[0033] Then, gas is supplied into the connecting column 23 through the air inlet pipe, and the gas enters the hollow tube inside the medical injection molded part 6 along the connecting column 23. As the gas is continuously supplied, a certain air pressure will be formed inside the medical injection molded part 6. At the same time, the upper mold 3 presses down and cooperates with the lower mold 2 to completely fix the medical injection molded part 6 and form a relatively closed testing space.

[0034] At this point, the gas detection mechanism on the upper mold 3 is used to detect the gas state within the detection space. If there is an air leak in the medical injection molded part 6, the gas detection mechanism will detect relevant changes in the gas leak (such as changes in gas pressure, gas composition, etc.); if the medical injection molded part 6 has good airtightness, the gas detection mechanism will not detect any abnormal gas changes. After the detection is completed, appropriate actions are taken based on the detection results. Simultaneously, the air supply to the air inlet pipe is stopped, the upper mold 3 rises and resets, and the lower mold 2 moves to facilitate the removal of the medical injection molded part 6.

[0035] Combination Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the drive mechanism 4 includes a drive motor 41 mounted on the worktable 1, and the output end of the drive motor 41 is fixedly connected to one side of the fixed base 21 of the lower mold 2.

[0036] Specifically, the drive motor 41 is mounted on the worktable 1. The drive motor 41 is the power source for the entire drive mechanism 4, responsible for providing the mechanical energy required to drive the lower mold 2 to move, thus meeting the movement requirements of the lower mold 2 during the inspection process.

[0037] The output end of the drive motor 41 is fixedly connected to one side of the fixed base 21 of the lower mold 2. This ensures that the power of the drive motor 41 can be effectively transmitted to the fixed base 21 of the lower mold 2, so that the fixed base 21 can move as the drive motor 41 operates.

[0038] When an airtightness test is required for the medical injection molded part 6, the drive motor 41 is started. The output end of the drive motor 41 begins to rotate. Since the output end is fixedly connected to one side of the fixed seat 21 of the lower mold 2, the rotational power will drive the fixed seat 21 to slide on the worktable 1. By controlling the rotation direction of the drive motor 41 (forward or reverse), the fixed seat 21 can be moved in different directions on the worktable 1.

[0039] When placing the medical injection molded part 6, the drive motor 41 drives the fixed base 21 to move to a position convenient for the operator. After the medical injection molded part 6 is placed, the drive motor 41 again drives the fixed base 21 to move to a position that mates with the upper mold 3, so that the upper mold 3 can press down to fix the medical injection molded part 6 and perform airtightness testing. After the test is completed, the drive motor 41 can also drive the fixed base 21 to move, making it easy to remove the tested medical injection molded part 6. By controlling parameters such as the operating speed and operating time of the drive motor 41, the moving distance and position of the lower mold 2 can be controlled to ensure the smooth progress of the entire airtightness testing process.

[0040] Combination Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a sliding groove 11 is provided on the workbench 1, and a sliding block 211 matching the sliding groove 11 is provided at the bottom of the fixed seat 21.

[0041] Specifically, a sliding groove 11 is provided on the worktable 1. The sliding groove 11 is a groove structure machined at a specific position on the surface of the worktable 1, which is adapted to the sliding component at the bottom of the fixed base 21, providing a track and guidance for the movement of the lower mold 2. The depth, width, and length of the sliding groove 11 need to be determined according to the movement range and stability requirements of the lower mold 2 to ensure that the lower mold 2 can run smoothly and stably during the movement.

[0042] The bottom of the fixed base 21 is provided with a sliding block 211 that matches the sliding groove 11. The shape and size of the sliding block 211 correspond to the sliding groove 11, and it is usually a raised strip or block structure that can be embedded in the sliding groove 11. The sliding block 211 ensures the reliability and stability of the movement of the lower mold 2.

[0043] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the upper mold 3 includes a base 31. The bottom of the base 31 is provided with a pressing and fixing groove 32 that matches the top outline of the medical injection molded part 6. The interior of the pressing and fixing groove 32 is provided with air vents 33 that correspond sequentially to the connecting column 23. All air vents 33 are provided with airflow sensors.

[0044] Specifically, the upper mold 3 includes a base 31, which is the main support structure of the upper mold 3 and provides an installation base for other components. Its shape and size are determined according to the design requirements of the overall device and the matching requirements with the lower mold 2. It usually has a certain strength and rigidity to withstand the pressure during the pressing process.

[0045] The bottom of the base 31 is provided with a pressing and fixing groove 32, the shape of which matches the top outline of the medical injection molded part 6. This allows the pressing and fixing groove 32 to fit tightly against the top outline of the medical injection molded part 6 when the upper mold 3 is pressed down, thus fixing and positioning the medical injection molded part 6 and ensuring that it remains stable during the testing process without moving or shaking.

[0046] The lower pressing and fixing groove 32 has multiple air vents 33 inside, and the positions of these air vents 33 correspond sequentially to the connecting posts 23 on the lower mold 2. The function of the air vents 33 is to provide space for the connecting posts 23 on the lower mold 2 to be inserted when the upper mold 3 and the lower mold 2 are engaged, while ensuring that gas can flow normally between the connecting posts 23 and the upper mold 3.

[0047] All air outlets 33 are equipped with airflow sensors. An airflow sensor is a sensor that can detect the state of gas flow (such as gas flow rate, velocity, pressure changes, etc.) and convert the detected gas flow information into an electrical signal output for subsequent processing and analysis by the gas detection mechanism.

[0048] Combination Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the lifting mechanism 5 includes a mounting frame 51 set on the workbench 1, and a cylinder 52 is set on the mounting frame 51. The output end of the cylinder 52 is fixedly connected to the top of the base 31 of the upper mold 3.

[0049] Specifically, the lifting mechanism 5 includes a mounting bracket 51 mounted on the worktable 1. The mounting bracket 51 is a frame structure and is fixed to the worktable 1 by welding, bolting, or other methods. The function of the mounting bracket 51 is to provide mounting support for the cylinder 52, ensuring that the cylinder 52 can be stably mounted above the worktable 1, providing a reliable mounting foundation for the subsequent lifting of the upper mold 3.

[0050] A cylinder 52 is mounted on the mounting bracket 51. The cylinder 52 is a common pneumatic actuator that uses the pressure energy of compressed air to convert it into mechanical energy, thereby achieving linear reciprocating motion. The cylinder 52 is selected based on factors such as the weight of the upper mold 3, the lifting height, and the required driving force to ensure that it can reliably drive the upper mold 3 to perform lifting operations.

[0051] The output end of cylinder 52 is fixedly connected to the top of the base 31 of the upper mold 3. This connection is typically achieved by bolts, welding, or specific connectors to ensure that the output end of cylinder 52 can effectively transmit power to the base 31 of the upper mold 3, allowing the upper mold 3 to rise and fall with the movement of the piston rod of cylinder 52.

[0052] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a detection panel 7 is installed on the workbench 1.

[0053] Specifically, the testing panel 7 is mounted on the workbench 1. The testing panel 7 typically integrates various testing devices and display elements. The testing devices may include, but are not limited to, a signal processing module for receiving and processing signals from the airflow sensor. This module can amplify, filter, and perform analog-to-digital conversion on the electrical signals output by the airflow sensor for subsequent analysis and judgment. It may also include a data analysis module for analyzing the processed data to determine whether the medical injection molded part 6 is leaking according to preset judgment criteria. The display elements may include a display screen for intuitively displaying test results, such as "pass" or "fail," and may also include indicator lights that use different colors or flashing states to indicate the test status and results.

[0054] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the workbench 1 is equipped with control buttons 8 and alarm lights 9.

[0055] Specifically, control button 8 is installed on workbench 1. The installation location is generally chosen to ensure ease of operation for the operator, and is usually placed in a position that is easily accessible and will not interfere with other operations. The installation method may be bolt fixing or snap-on installation, ensuring that the button is securely installed on workbench 1 and will not loosen during operation.

[0056] When the operator presses the "Start" control button 8, the internal contacts of the button close, activating the corresponding control circuit. This circuit sends start signals to the control devices of the cylinder 52 of the lifting mechanism 5, the drive motor 41 of the drive mechanism 4, and the gas detection mechanism. Upon receiving the signal, the cylinder 52 of the lifting mechanism 5 begins to operate, driving the upper mold 3 to descend; upon receiving the signal, the drive motor 41 of the drive mechanism 4 starts to operate, moving the lower mold 2 to the appropriate position; the gas detection mechanism then prepares to receive the signal from the airflow sensor, and the entire airtightness detection process begins.

[0057] If the detection needs to be stopped during the testing process, the operator presses the "Stop" control button 8. The internal contacts of the button disconnect, cutting off the corresponding control circuit. At this time, the lifting mechanism 5, the drive mechanism 4, and the gas detection mechanism will all stop working. The upper mold 3 stops lifting, the lower mold 2 stops moving, and the gas detection process is also paused.

[0058] After the test is completed, press the "Reset" control button 8, and the system will perform a reset operation. For example, the lifting mechanism 5 will drive the upper mold 3 to rise and reset, the drive mechanism 4 may drive the lower mold 2 to move to the initial position, and the gas detection mechanism will clear the previous detection data to prepare for the next test.

[0059] Alarm light 9 is also installed on workbench 1, typically in a high and conspicuous position to ensure that operators can see the illuminated state of alarm light 9 from all positions on workbench 1. The installation method may be threaded connection or welding, ensuring that alarm light 9 is securely installed.

[0060] During the airtightness test, if the medical injection molded part 6 has good airtightness, the data analysis module on the test panel 7 will determine the result as qualified. At this time, the alarm light 9 will be off, indicating that the test process is proceeding normally and the product is qualified. When the data analysis module on the test panel 7 determines that the medical injection molded part 6 has an air leak, i.e., the test result is unqualified, the data analysis module will send a control signal to the alarm light 9. Upon receiving the signal, the alarm light 9 will illuminate, emitting a conspicuous light signal to remind the operator that the medical injection molded part 6 being tested is unqualified and needs to be dealt with promptly. The operator can remove the unqualified product and perform the corresponding follow-up operations according to the prompt of the alarm light 9.

[0061] The above embodiments only illustrate one or more implementation methods of this utility model application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model application, and these all fall within the protection scope of this utility model application. Therefore, the protection scope of this utility model application should be determined by the appended claims.

Claims

1. An airtightness leak detection device, comprising a workbench (1), a lower mold (2) for placing a medical injection molded part (6) is provided on the workbench (1), and an upper mold (3) is provided above the lower mold (2), characterized in that, A drive mechanism (4) for moving the lower mold (2) on one side is provided, and a lifting mechanism (5) for lifting the upper mold (3) is provided on the top. An air inlet pipe is connected to the lower mold (2), and a gas detection mechanism is connected to the upper mold (3). When the medical injection molded part (6) is placed on the lower mold (2), the upper mold (3) presses down to fix the medical injection molded part (6). At this time, air is blown into the lower mold (2), and the gas detection mechanism on the upper mold (3) is used to detect whether the medical injection molded part (6) is leaking air.

2. The airtightness leak detection device according to claim 1, characterized in that, The lower mold (2) includes a fixed seat (21) that is slidably connected to the worktable (1). The fixed seat (21) is provided with a storage groove (22) that matches the bottom outline of the medical injection molded part (6). The storage groove (22) is provided with connecting columns (23) that match all the empty tubes inside the medical injection molded part (6). Each connecting column (23) is connected to an air intake pipe.

3. The airtightness leak detection device according to claim 2, characterized in that, The drive mechanism (4) includes a drive motor (41) mounted on the workbench (1), and the output end of the drive motor (41) is fixedly connected to one side of the fixed seat (21) of the lower mold (2).

4. The airtightness leak detection device according to claim 3, characterized in that, A sliding groove (11) is provided on the workbench (1), and a sliding block (211) matching the sliding groove (11) is provided at the bottom of the fixed seat (21).

5. A leak detection device for airtightness according to claim 1 or 4, characterized in that, The upper mold (3) includes a base (31). The bottom of the base (31) is provided with a pressing and fixing groove (32) that matches the top outline of the medical injection molded part (6). The interior of the pressing and fixing groove (32) is provided with air vents (33) that correspond to the connecting column (23) in sequence. All air vents (33) are provided with airflow sensors.

6. The airtightness leak detection device according to claim 5, characterized in that, The lifting mechanism (5) includes a mounting frame (51) set on the workbench (1), and a cylinder (52) is set on the mounting frame (51). The output end of the cylinder (52) is fixedly connected to the top of the base (31) of the upper mold (3).

7. The airtightness leak detection device according to claim 6, characterized in that, A detection panel (7) is provided on the workbench (1).

8. The airtightness leak detection device according to claim 7, characterized in that, The workbench (1) is equipped with control buttons (8) and alarm lights (9).

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