Air tightness detection jig and detection system
By designing an adjustable airtightness testing fixture for the interface, the problem of difficult cable testing was solved, enabling stable and reliable testing of cables of different sizes and improving the applicability and accuracy of the testing.
Patent Information
- Application Number
- CN202423049867.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Traditional cables are difficult to test for air tightness, which can easily cause corrosion or damage to the cables and affect the normal use of the endoscope.
An airtightness testing fixture was designed, including a fixture body, a first guide structure, and a second guide structure. It is connected to an air supply device and a sample to be tested through an adjustable interface, and uses airflow to observe bubbles to detect leak points.
It achieves stable and reliable detection of cables, is suitable for cables of different sizes, has a wider detection range and more reliable results.
Smart Images
Figure CN223485407U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of mechanical fixtures, specifically to an airtightness testing fixture and testing system. Background Technology
[0002] Medical endoscopes require sterilization of all components before and after use. Therefore, the airtightness of each component is crucial to prevent disinfectant liquids or gases from entering and damaging the endoscope. However, for cable components, which contain optical fibers or conductors, leaks are difficult to detect during airtightness testing. If a leak does occur, disinfectant liquids can easily enter, causing corrosion or damage, and in severe cases, affecting the normal operation of the entire endoscope. Utility Model Content
[0003] In order to solve the above-mentioned technical problems, the main purpose of this utility model is to provide an airtightness testing fixture and testing system, which aims to solve the problem that the traditional airtightness testing of cables is difficult, which can easily cause corrosion or damage to the cables, and in severe cases, affect the normal use of the entire endoscope.
[0004] To achieve the above objectives, this utility model proposes an airtightness testing fixture, comprising:
[0005] The main body of the fixture has a guide channel formed inside it;
[0006] A first conductive structure is adapted to connect the conductive channel and the gas supply device, wherein the first conductive structure has a first pair of interfaces that are connected to the gas supply device.
[0007] The second conductive structure is adapted to connect the conductive channel and the sample to be tested, and the second conductive structure has a second pair of interfaces that are connected to the sample to be tested;
[0008] The size of at least one of the first pair of interfaces and the second pair of interfaces is adjustable.
[0009] Optionally, the first conductive structure and the second conductive structure are configured identically.
[0010] Optionally, the first conductive structure and the second conductive structure are not configured in the same way, wherein the size of the second pair of interfaces is adjustable.
[0011] Optionally, the first guide structure includes a first guide joint, one end of which is screwed to the fixture body, and the first mating interface is located at the other end of the first guide joint for insertion into an air pipe suitable for supplying an air supply device.
[0012] Optionally, the second conductive structure includes:
[0013] The second guide connector has its first end screwed to the main body of the fixture, and the second pair of interfaces is formed at the second end of the second guide connector;
[0014] A locking element is provided at the second end of the second guide connector and is used to lock the second pair of interfaces so that the second pair of interfaces clamp and fix the sample to be tested.
[0015] Optionally, the second guide has elastic deformability at the corresponding second pair of interfaces.
[0016] Optionally, the second end of the second guide joint protrudes and is provided with a plurality of elastic retaining ribs arranged in a ring shape, the plurality of elastic retaining ribs being arranged to enclose and form the second pair of interfaces.
[0017] Optionally, the outer periphery of the second guide joint is provided with external threads, and the locking member includes a locking nut. The locking nut is hollow and has internal threads. The locking nut is screwed to the second guide joint and at least partially covers the end of the second pair of interfaces.
[0018] Optionally, the second guide structure further includes a seal, which is sleeved inside the second pair of interfaces, and at least a portion of the locking nut is pressed against the end of the seal facing outward from the second pair of interfaces.
[0019] This utility model also provides an airtightness testing system, including the airtightness testing fixture described above.
[0020] The technical solution provided by this utility model has the following beneficial effects:
[0021] The airtightness testing fixture provided by this utility model includes a fixture body, a first guiding structure, and a second guiding structure. A guiding channel is formed within the fixture body. The first guiding structure connects the air supply device and the guiding channel, while the second guiding structure connects the guiding channel and the sample to be tested (such as a cable). During testing, both the airtightness testing fixture and the sample can be placed in water. The air supply device inflates the first guiding structure, allowing airflow to enter the second guiding structure through the guiding channel of the fixture body and then into the sample to be tested. Continuous inflation allows for observation of the sample under test. The test fixture checks for the presence of air bubbles in the water. The presence of air bubbles indicates a leak at that location, while the absence of air bubbles throughout the test indicates good airtightness. Furthermore, at least one of the following interfaces—the first pair connecting the first guide structure to the air supply device and the second pair connecting the second guide structure to the sample—is adjustable. This allows the first pair of interfaces to connect to air tubes of different sizes, providing more diverse air supply methods. And / or, it allows the second pair of interfaces to connect to samples of different sizes, better meeting the testing needs of samples of varying sizes and expanding the testing range. This airtightness testing fixture not only provides stable and reliable testing of cable airtightness but also tests various cables of different sizes, offering a wider testing range and more reliable results. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.
[0023] Figure 1 A schematic diagram of the structure of an embodiment of an airtightness testing fixture provided by this utility model;
[0024] Figure 2 This is a schematic diagram of another embodiment of an airtightness testing fixture provided by this utility model;
[0025] Figure 3 for Figure 2 A cross-sectional structural diagram of the airtightness testing fixture described herein;
[0026] Figure 4 for Figure 2 A schematic diagram of the exploded structure of the airtightness testing fixture described herein.
[0027] Explanation of icon numbers:
[0028] 100-Air tightness testing fixture; 1- Fixture body; 11-Conducting channel; 2-First guiding structure; 21-First guiding connector; 211-First mating interface; 3-Second guiding structure; 31-Second guiding connector; 311-Second mating interface; 32-Elastic retaining rib; 33-Locking element; 331-Locking nut; 34-Sealing element; 200-Cable; 300-Air tube.
[0029] The realization of the purpose, functional characteristics and excellent effects of this utility model will be further explained below in conjunction with specific embodiments and accompanying drawings. Detailed Implementation
[0030] 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.
[0031] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0033] This utility model provides an airtightness testing fixture 100, which can be used to test samples, especially pipe fittings, for airtightness testing. Preferably, it can be used to test the airtightness of endoscope cables 200. For ease of explanation, the following description will mainly use the testing of cables 200 as an example to illustrate the specific structure of the airtightness testing fixture 100. Other samples to be tested can be adapted accordingly.
[0034] Specifically, please refer to Figures 1 to 2 In this embodiment, the airtightness testing fixture 100 includes a fixture body 1, a first guiding structure 2, and a second guiding structure 3. A guiding channel 11 is formed within the fixture body 1. The first guiding structure 2 is adapted to connect the guiding channel 11 and an air supply device, and the first guiding structure 2 has a first pair of interfaces 211 that are connected to the air supply device. The second guiding structure 3 is adapted to connect the guiding channel 11 and the sample to be tested, and the second guiding structure 3 has a second pair of interfaces 311 that are connected to the sample to be tested. The size of at least one of the first pair of interfaces 211 and the second pair of interfaces 311 is adjustable.
[0035] In this embodiment, the first conductive structure 2 connects the air supply device and the conductive channel 11, while the second conductive structure 3 connects the conductive channel 11 and the sample to be tested (such as cable 200). During testing, the airtightness testing fixture 100 and the sample to be tested can be placed in water. The air supply device inflates the first conductive structure 2, allowing the airflow to enter the second conductive structure 3 through the conductive channel 11 of the fixture body 1 and then into the sample to be tested. By continuously inflating the air, the location of air bubbles appearing in the water can be observed. If air bubbles are present, it indicates that the airtightness test is normal. If no air bubbles are emitted from the sample throughout the entire process, it indicates that the sample is airtight. Furthermore, at least one of the following pair of interfaces—the first pair 211 connecting the first guide structure 2 to the air supply device and the second pair 311 connecting the second guide structure 3 to the sample—is adjustable. This allows the first pair of interfaces 211 to be connected to air tubes 300 of different sizes, providing more diverse air supply methods. And / or, it allows the second pair of interfaces 311 to be connected to samples of different sizes, better meeting the testing needs of samples of different sizes and expanding the testing range. The airtightness testing fixture 100 can not only reliably test the airtightness of cables 200, but also test various cables 200 of different sizes, resulting in a wider testing range and more reliable test results.
[0036] It should be noted that the gas supply device includes a gas pipe 300, which is connected to the first pair of interfaces 211 to deliver gas into the fixture body 1 and then into the cable 200. Both the gas pipe 300 and the cable 200 are approximately cylindrical, and both the first pair of interfaces 211 and the second pair of interfaces 311 are approximately circular. By making the first pair of interfaces 211 adjustable, it can better adapt to gas pipes 300 of different diameters; by making the second pair of interfaces 311 adjustable, it can better adapt to cables 200 of different diameters, thus broadening the scope of application and improving the applicability of the airtightness testing fixture 100.
[0037] In one embodiment, such as Figure 1 As shown, the first conductive structure 2 and the second conductive structure 3 are arranged in the same way, which makes them easier to manufacture and lowers the cost.
[0038] In another embodiment, combined Figure 2 and Figure 3 As shown, the first guiding structure 2 and the second guiding structure 3 are not uniformly arranged. Preferably, the size of the second pair of interfaces 311 is adjustable, while the size of the first pair of interfaces 211 is fixed. This allows the first pair of interfaces 211 to be fixed to the end of the air tube 300, eliminating the need for frequent insertion and removal of the air tube 300 during testing, making the testing operation more convenient and the connection to the air supply end more stable, thus ensuring a more stable air supply. Furthermore, the adjustable size of the second pair of interfaces 311 allows them to be connected to cables 200 of different diameters, enabling testing of cables 200 of different diameters.
[0039] Preferably, combined with Figure 3 and Figure 4 As shown, the first guiding structure 2 includes a first guiding connector 21. One end of the first guiding connector 21 is screwed to the fixture body 1, and the first mating interface 211 is located at the other end of the first guiding connector 21, into which a gas pipe 300 suitable for a gas supply device is inserted. The gas supply device can provide gas at a certain pressure to enter the gas pipe 300, and through the gas pipe 300, it enters the fixture body 1 via the first guiding connector 21, and then enters the cable 200 via the second guiding structure 3. The gas supply device can provide a continuous and stable gas pressure for a certain period of time, ensuring the stability and accuracy of the test results.
[0040] The first guide joint 21 is generally cylindrical with open ends. An external thread is provided at the first end of the first guide joint 21, and an internal thread is provided at the first end of the guide channel 11. The first end of the first guide joint 21 is screwed into the first end of the guide channel 11, allowing the first guide joint 21 to be easily disassembled from the fixture body 1, and facilitating maintenance and replacement. The first guide joint 21 has an externally threaded section, a first guide section, and a second guide section arranged sequentially. A stepped portion is formed between the first guide section and the externally threaded section, which abuts against the end of the fixture body 1 to limit the screwing depth of the first guide joint 21. The first guide section has a polygonal shape to facilitate locking and unlocking with tools such as a wrench. The second guide section has multiple concave and convex structures, and the air tube 300 is inserted into the second guide section.
[0041] For the second conductive structure 3, preferably, as follows: Figure 4 As shown, the second guiding structure 3 includes a second guiding connector 31 and a locking member 33. The first end of the second guiding connector 31 is screwed to the fixture body 1, and the second pair of interfaces 311 is formed at the second end of the second guiding connector 31. The locking member 33 is disposed at the second end of the second guiding connector 31 and is used to lock the second pair of interfaces 311, so that the second pair of interfaces 311 clamps and fixes the sample to be tested. Since the second pair of interfaces 311 is adjustable, after the cable 200 is inserted into the second pair of interfaces 311, the cable 200 can be dislodged from the second pair of interfaces 311. The locking member 33 further retracts the second pair of interfaces 311, so that the second pair of interfaces 311 can clamp the cable 200 to completely fix the cable 200.
[0042] Specifically, the second guide connector 31 is also cylindrical with openings at both ends. The first end of the second guide connector 31 is screwed to the second end of the guide channel of the fixture body 1. Preferably, the guide channel is arranged in a straight line, so that the wind resistance formed by the guide channel is smaller and the airflow can enter the cable 200 better.
[0043] It is understandable that there are multiple ways to adjust the opening diameter of the second pair of interfaces 311. In one embodiment, the second guide 31 has elastic deformability at the corresponding second pair of interfaces 311, that is, the second end of the second guide 31 can be made of elastic material. Through the elastic change of the elastic material, the diameter of the second pair of interfaces 311 can be changed to better match cables 200 of different diameters. In this case, the locking member 33 can be set as a binding member, which is wrapped around the outer periphery of the second pair of interfaces 311 to lock the cable 200. The binding member can be set as a rope, rubber band, etc.
[0044] In another embodiment, such as Figure 4 As shown, a plurality of elastic retaining ribs 32 protrude from the second end of the second connector 31 and are arranged in a ring shape. The plurality of elastic retaining ribs 32 surround and form the second pair of interfaces 311. Each of the elastic retaining ribs 32 is cantilevered. By the elastic deformation of each elastic retaining rib 32, the size of the ring-shaped area formed by the plurality of elastic retaining ribs 32 can be adjusted, thereby making the plurality of elastic retaining ribs 32 adaptable to the fixing requirements of cables 200 of different diameters.
[0045] Furthermore, an external thread is provided on the outer periphery of the second guide connector 31. The locking member 33 includes a locking nut 331, which is hollow and has an internal thread. The locking nut 331 is screwed to the second guide connector 31 and at least partially covers the end of the second pair of interfaces 311. The locking nut 331 has a connected threaded portion and a top cap portion. The threaded portion and the top cap portion are interconnected and coaxially arranged with the second guide connector 31. The threaded portion is screwed to the second guide connector 31 to fix the locking nut 331 and the second guide connector 31. The top cap portion at least partially covers the end of the second pair of interfaces 311, better sealing the end of the second pair of interfaces 311 and preventing gas leakage.
[0046] Moreover, combined Figure 3 and Figure 4 As shown, the second conductive structure 3 also includes a sealing element 34, which is sleeved on the inner side of the second pair of interfaces 311, and at least a portion of the locking nut 331 is pressed against the end of the sealing element 34 facing outward from the second pair of interfaces 311. The sealing element 34 can better form a seal between the cable 200 and the second pair of interfaces 311, and the locking nut 331 limits the sealing element 34, which can better prevent the sealing element 34 from coming out, further ensuring the reliability of the seal.
[0047] This utility model also provides an airtightness testing system, which includes the aforementioned airtightness testing fixture 100, a leak detection precision detector, and a water tank. The leak detection precision detector includes an air tube 300, which is connected to the first pair of interfaces 211 of the airtightness testing fixture 100. The airtightness testing fixture 100 is placed inside the water tank. During testing, by activating the leak detection precision detector and inputting a preset air pressure value, gas is transmitted through the air tube 300 to the airtightness testing fixture 100 and then to the cable 200 to be tested. The cable 200 to be tested is also placed inside the water tank during testing. By observing the air bubbles in the water tank, the airtightness of the cable 200 is determined. This method offers better testing stability and more reliable test results.
[0048] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structure made using the contents of the present utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present utility model.
Claims
1. An airtightness testing fixture, characterized in that, include: The main body of the fixture has a guide channel formed inside it; A first conductive structure is adapted to connect the conductive channel and the gas supply device, wherein the first conductive structure has a first pair of interfaces that are connected to the gas supply device. The second conductive structure is adapted to connect the conductive channel and the sample to be tested, and the second conductive structure has a second pair of interfaces that are connected to the sample to be tested; The size of at least one of the first pair of interfaces and the second pair of interfaces is adjustable.
2. The airtightness testing fixture as described in claim 1, characterized in that, The first conductive structure and the second conductive structure are configured identically.
3. The airtightness testing fixture as described in claim 1, characterized in that, The first conductive structure and the second conductive structure are not configured in the same way, wherein the size of the second pair of interfaces is adjustable.
4. The airtightness testing fixture as described in claim 1, characterized in that, The first guide structure includes a first guide joint, one end of which is screwed to the main body of the fixture, and the first mating interface is located at the other end of the first guide joint for insertion into an air pipe suitable for supplying air.
5. The airtightness testing fixture as described in claim 1, characterized in that, The second conductive structure includes: The second guide connector has its first end screwed to the main body of the fixture, and the second pair of interfaces is formed at the second end of the second guide connector; A locking element is provided at the second end of the second guide connector and is used to lock the second pair of interfaces so that the second pair of interfaces clamp and fix the sample to be tested.
6. The airtightness testing fixture as described in claim 5, characterized in that, The second conductor has elastic deformation at the corresponding second pair of interfaces.
7. The airtightness testing fixture as described in claim 5, characterized in that, The second end of the second guide joint has a protrusion with a plurality of elastic retaining ribs arranged in a ring shape, and the plurality of elastic retaining ribs surround to form the second pair of interfaces.
8. The airtightness testing fixture as described in claim 5, characterized in that, The outer periphery of the second guide joint is provided with external threads, and the locking member includes a locking nut. The locking nut is hollow and has internal threads. The locking nut is screwed to the second guide joint and at least partially covers the end of the second pair of interfaces.
9. The airtightness testing fixture as described in claim 8, characterized in that, The second guide structure further includes a seal, which is sleeved inside the second pair of interfaces, and at least a portion of the locking nut is pressed against the end of the seal facing outward from the second pair of interfaces.
10. An airtightness detection system, characterized in that, Includes the airtightness testing fixture as described in any one of claims 1 to 9.