Luer taper testing tool
By designing a testing fixture for Luer joints, and using a tensile testing machine and rotating parts to perform axial pressure and rotation tests on Luer joints, the problem of high cost of existing Luer testing instruments is solved, achieving effective cost reduction and flexible testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-04-03
AI Technical Summary
Existing Luer analyzers are expensive, increasing production costs for biopharmaceutical companies.
Design a Luer joint testing fixture, including an upper mounting assembly and a lower mounting assembly, to perform axial pressure and rotation tests on the Luer joint using a tensile testing machine and rotating components, replacing the expensive Luer testing instrument.
It significantly reduces production costs, minimizes capital investment and equipment maintenance costs, and provides a flexible testing solution.
Smart Images
Figure CN224081141U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of Luer joint testing technology, and in particular to a Luer joint testing fixture. Background Technology
[0002] In the biopharmaceutical field, Luer connectors play a crucial role as key components connecting infusion tubing, syringes, and other medical devices. Ensuring the airtightness of Luer connectors during use and preventing leakage is of great significance for guaranteeing the safety, stability, and effectiveness of biopharmaceutical manufacturing processes.
[0003] However, given the current state of technology, leak testing of Luer joints primarily relies on Luer testers to complete the relevant testing work.
[0004] Although some Luer connector leak testers exist on the market that meet national standards, these devices are generally expensive. Typically, such testers cost around 40,000 yuan, which significantly increases the cost burden for biopharmaceutical companies when conducting Luer connector leakage tests, hindering their ability to reduce production costs. Utility Model Content
[0005] Therefore, the purpose of this utility model is to provide a Luer joint testing fixture to solve the problems mentioned above in the background art.
[0006] A Luer joint testing fixture includes an upper mounting assembly and a lower mounting assembly detachably mounted on the test top surface and test bottom surface of a tensile testing machine, respectively. The upper mounting assembly includes an upper mounting base, a connector mounted on the upper mounting base, and an upper fixing clamp detachably connected to the connector. The lower mounting assembly includes a lower mounting base, a rotating component mounted on the mounting base, and a lower fixing clamp mounted on the rotating component. The tensile testing machine is used to apply axial pressure to the sample to be tested between the upper fixing clamp and the lower fixing clamp. The rotating component is used to drive the lower fixing clamp to rotate the sample to be tested around its axis.
[0007] Compared to existing technologies, the advantages of this application are as follows: To test a Luer joint sample, firstly, both ends are connected to the upper and lower fixing clamps respectively, ensuring a secure installation on the test fixture. Then, the test fixture with the Luer joint sample is placed on a tensile testing machine, and a fixed downward pressure is precisely set on the machine, applying this pressure to the Luer joint sample. After the downward pressure reaches a preset position, the rotating component is adjusted to the specified preset value. After completing this series of operations, the test fixture needs to be removed from the tensile testing machine, and then the entire test fixture is connected to the test pipeline for subsequent testing. As can be seen from the above process, this simple test fixture can effectively replace existing expensive equipment, significantly reducing production costs. Since there is no need to purchase expensive large equipment, not only is capital investment reduced, but considerable space is also freed up, effectively reducing testing costs and equipment maintenance expenses.
[0008] Furthermore, the upper mounting base has a first mounting groove on the side near the connector, and the connector has a first mounting portion extending from the side near the upper mounting base, the first mounting portion being adapted to the first mounting groove.
[0009] Furthermore, the cross-sections of the first mounting part and the first mounting groove are polygonal.
[0010] Furthermore, the connector has a second mounting groove on the side near the lower fixing clamp, and the upper fixing clamp has a second mounting portion extending from the end near the connector, the second mounting portion being threadedly connected to the second mounting groove.
[0011] Furthermore, the lower mounting base includes a base plate, a limiting part rotatably connected to the base plate, and a receiving groove formed on the side of the limiting part opposite to the base plate, the shape of the receiving groove being adapted to the bottom contour of the rotating member.
[0012] Furthermore, a protrusion extends from the side of the base plate near the mounting portion, and a bearing is fitted onto the protrusion. An adapter groove is provided on the side of the limiting portion near the base plate, and the adapter groove is used to install the bearing.
[0013] Furthermore, a third mounting groove is provided at the end of the rotating component away from the lower mounting base, and a third mounting portion extends from the end of the lower fixing clamp near the rotating component, the third mounting portion being adapted to the third mounting groove.
[0014] Furthermore, the rotating component is a torque wrench, the output end of which is connected to the lower fixed clamp, and the torque wrench is equipped with an angle sensor and a torque value display module. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of the Luer joint testing fixture of this utility model;
[0016] Figure 2 This is a three-dimensional structural schematic diagram of the Luer joint testing fixture of this utility model;
[0017] Figure 3 This is an exploded view of the testing fixture for the Luer joint of this utility model.
[0018] Key component symbols: 10. Upper mounting assembly; 11. Upper mounting base; 111. First mounting slot; 12. Connector; 121. First mounting part; 122. Second mounting slot; 13. Upper fixing clamp; 131. Second mounting part; 20. Lower mounting assembly; 21. Lower mounting base; 211. Base plate; 212. Limiting part; 213. Receiving slot; 214. Protrusion; 215. Bearing; 216. Adaptor slot; 22. Rotating component; 221. Third mounting slot; 23. Lower fixing clamp; 231. Third mounting part; 30. Sample; 41. Test top surface; 42. Test bottom surface. Detailed Implementation
[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.
[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0022] Please see Figures 1 to 2The image shows a Luer joint testing fixture according to an embodiment of the present invention, comprising: an upper mounting assembly 10 and a lower mounting assembly 20 detachably mounted on the test top surface 41 and test bottom surface 42 of a tensile testing machine, respectively. The upper mounting assembly 10 includes an upper mounting base 11, a connector 12 mounted on the upper mounting base 11, and an upper fixing clamp 13 detachably connected to the connector 12. The lower mounting assembly 20 includes a lower mounting base 21, a rotating component 22 mounted on the mounting base, and a lower fixing clamp 23 mounted on the rotating component 22. The tensile testing machine is used to apply axial pressure to the sample 30 to be tested between the upper fixing clamp 13 and the lower fixing clamp 23. The rotating component 22 is used to drive the lower fixing clamp 23 to rotate the sample 30 to be tested around its axis.
[0023] In practical implementation, the Luer joint sample 30 is tested. First, its two ends are connected to the upper fixing clamp 13 and the lower fixing clamp 23 respectively, ensuring that it is securely installed on the test fixture. Then, the test fixture with the Luer joint sample 30 is placed on a tensile testing machine, and a fixed downward pressure is precisely set on the tensile testing machine, applying this downward pressure to the Luer joint sample 30. After the downward pressure reaches the preset position, the setting of the rotating component 22 is adjusted to the specified preset value. After completing this series of operations, the test fixture needs to be removed from the tensile testing machine, and then the entire test fixture is connected to the test pipeline for subsequent testing. As can be seen from the above process, using this simple test fixture can effectively replace existing expensive equipment, significantly reducing production costs. Since there is no need to purchase expensive large equipment, not only is capital investment reduced, but considerable space is also freed up, effectively reducing testing costs and equipment maintenance expenses.
[0024] In this embodiment, the two ends of the Luer joint sample 30 to be tested are first connected to the upper fixing clamp 13 and the lower fixing clamp 23 respectively, ensuring that the sample 30 is correctly installed on the test fixture. Next, the test fixture containing the Luer joint sample 30 is installed on a tensile testing machine, and a fixed downward pressure of 27.5N is set on the tensile testing machine. After the downward pressure is applied, a torque wrench is used to rotate to the specified setting, with the torque set to 0.12N. After completing the above operations, remove the fixture and connect the entire fixture to the test pipeline. Then, immerse the connected test pipeline in water. Next, connect the air source and adjust the pressure regulating valve to 0.3 MPa, maintaining this pressure for 30 seconds. Finally, carefully observe the male and female Luer connectors for any air bubbles or leakage, thus obtaining the test results shown in Table 1.
[0025]
[0026] Table 1
[0027] The "holes" #1, #2, #3, and #4 refer to a marking position on the Luer product during manufacturing. These are injection molded, and a single mold can produce several holes at a time, resulting in four hole numbers. Specifically, each hole number represents a marking position on the product during manufacturing. Since the Luer is injection molded, a mold can produce four holes at a time, hence the four hole numbers. In this test, neither the male nor female Luer adapters showed significant bubble leakage in holes #1-#4 after the specified pressure and time testing, indicating good sealing performance in these areas.
[0028] Please see Figure 3 Specifically, the upper mounting base 11 has a first mounting groove 111 on the side near the connector 12, and the connector 12 has a first mounting portion 121 extending from the side near the upper mounting base 11. The first mounting portion 121 is adapted to the first mounting groove 111. More specifically, the cross-section of the first mounting portion 121 and the first mounting groove 111 is polygonal. The polygon is a regular hexagon. By using a regular hexagon, the first mounting portion 121 can be more stably installed in the first mounting groove 111. In this embodiment, the first mounting portion 121 and the first mounting groove 111 are connected by an interference fit or a plug-in connection.
[0029] Specifically, the connector 12 has a second mounting groove 122 on the side near the lower fixing clip 23, and the upper fixing clip 13 has a second mounting part 131 extending from the end near the connector 12, and the second mounting part 131 is threadedly connected to the second mounting groove 122.
[0030] Specifically, the lower mounting base 21 includes a base plate 211, a limiting part 212 rotatably connected to the base plate 211, and a receiving groove 213 formed on the side of the limiting part 212 away from the base plate 211. The shape of the receiving groove 213 is adapted to the bottom contour of the rotating member 22.
[0031] More specifically, the base plate 211 has a protrusion 214 extending from the side near the mounting part, and a bearing 215 is fitted on the protrusion 214. The limiting part 212 has an adapter groove 216 on the side near the base plate 211, and the adapter groove 216 is used to install the bearing 215.
[0032] Specifically, the rotating component 22 has a third mounting groove 221 at the end opposite to the lower mounting base 21, and the lower fixing clip 23 extends a third mounting portion 231 at the end near the rotating component 22, the third mounting portion 231 being adapted to the third mounting groove 221. Similarly, the cross-section of the third mounting portion 231 and the third mounting groove 221 are both hexagonal, and they are connected by interference fit or plug-in connection.
[0033] Specifically, the rotating component 22 is a torque wrench, the output end of which is connected to the lower fixed clamp 23. The torque wrench is equipped with an angle sensor and a torque value display module. The torque wrench can be a manual or electric torque wrench. The angle sensor measures the angle rotated by the torque wrench during rotation, providing accurate angle data. The torque value display module displays the applied torque value in real time, facilitating monitoring and adjustment of the torque by the operator.
[0034] In summary, the Luer joint testing fixture in the above embodiments of this utility model has the following beneficial effects:
[0035] To test the Luer joint sample 30, first connect both ends to the upper fixing clamp 13 and the lower fixing clamp 23 respectively, ensuring it is securely mounted on the test fixture. Then, place the test fixture with the Luer joint sample 30 on a tensile testing machine, precisely setting a fixed downward pressure on the machine, and apply this pressure to the Luer joint sample 30. After the downward pressure reaches the preset position, adjust the setting of the rotating component 22 to the specified preset value. After completing this series of operations, remove the test fixture from the tensile testing machine, and then connect the entire test fixture to the test pipeline for subsequent testing. As can be seen from the above process, using this simple test fixture can effectively replace existing expensive equipment, significantly reducing production costs. Since there is no need to purchase expensive large equipment, not only is capital investment reduced, but considerable space is also freed up, effectively reducing testing costs and equipment maintenance expenses.
[0036] This testing fixture offers numerous advantages. First, it is relatively inexpensive, eliminating the need for companies to invest heavily in its procurement. Second, its compact size and small footprint prevent it from taking up excessive space like some large pieces of equipment. Furthermore, it requires virtually no maintenance, further reducing operating expenses. Finally, its flexible operation allows it to easily handle various testing needs, providing significant convenience for businesses.
[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A testing fixture for Luer joints, characterized in that, include: An upper mounting assembly and a lower mounting assembly are detachably mounted on the test top and test bottom surfaces of a tensile testing machine, respectively. The upper mounting assembly includes an upper mounting base, a connector mounted on the upper mounting base, and an upper fixing clamp detachably connected to the connector. The lower mounting assembly includes a lower mounting base, a rotating component mounted on the mounting base, and a lower fixing clamp mounted on the rotating component. The tensile testing machine is used to apply axial pressure to the sample to be tested between the upper and lower fixing clamps. The rotating component is used to drive the lower fixing clamp to rotate the sample to be tested around its axis.
2. The Luer joint testing fixture according to claim 1, characterized in that, The upper mounting base has a first mounting groove on the side near the connector, and the connector has a first mounting portion extending from the side near the upper mounting base, the first mounting portion being adapted to the first mounting groove.
3. The Luer joint testing fixture according to claim 2, characterized in that, The first mounting part and the first mounting groove have polygonal cross-sections.
4. The Luer joint testing fixture according to claim 1, characterized in that, The connector has a second mounting groove on the side near the lower fixing clamp, and the upper fixing clamp has a second mounting part extending from the end near the connector, the second mounting part being threadedly connected to the second mounting groove.
5. The Luer joint testing fixture according to claim 4, characterized in that, The lower mounting base includes a base plate, a limiting part rotatably connected to the base plate, and a receiving groove formed on the side of the limiting part away from the base plate. The shape of the receiving groove is adapted to the bottom contour of the rotating component.
6. The Luer joint testing fixture according to claim 5, characterized in that, The base plate has a protrusion extending from the side near the second mounting part, and a bearing is fitted on the protrusion. The limiting part has an adapter groove on the side near the base plate, and the adapter groove is used to install the bearing.
7. The Luer joint testing fixture according to claim 1, characterized in that, The rotating component has a third mounting groove at one end away from the lower mounting base, and the lower fixing clamp has a third mounting portion extending from one end near the rotating component, the third mounting portion being adapted to the third mounting groove.
8. The Luer joint testing fixture according to claim 1, characterized in that, The rotating component is a torque wrench, the output end of which is connected to the lower fixed clamp, and the torque wrench is equipped with an angle sensor and a torque value display module.