Sealing detection system
By setting up a sealing detection cavity on the outside of the aviation connector and using a sensor to detect the fluid content in the air, the problems of low efficiency and insufficient accuracy in sealing performance detection in the existing technology are solved, and efficient and accurate sealing detection is achieved.
Patent Information
- Application Number
- CN202511178647.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-22
- Publication Date
- 2025-10-17
AI Technical Summary
In the existing technology, the sealing performance testing of aviation connectors is inefficient, costly, and easily affected by human factors. It is difficult to ensure the accuracy and consistency of the testing and cannot meet the high-quality testing requirements.
A sealing detection system was designed. By setting a sealed detection cavity outside the device under test and using a sensor to detect the fluid substance content in the air in the cavity, a negative pressure device and multiple sensors were combined for parallel detection to achieve simultaneous detection of multiple devices under test.
It achieves accurate judgment of the sealing of aviation connectors, improves detection efficiency and accuracy, reduces human errors, and meets high-quality detection needs.
Smart Images
Figure CN120800673A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of fluid sealing, and more particularly to a sealing detection system for detecting the sealing performance of a device to be tested. BACKGROUND
[0002] The aviation connector is the core component of the aviation fuel system, and its sealing performance is directly related to the flight safety and the stable operation of the fuel system. Therefore, the detection of the aviation kerosene sealing performance of the aviation connector is particularly important during the production and manufacturing process. Currently, the traditional manual detection method is widely used in the industry, that is, aviation kerosene is injected into the oil injection cavity of the connector through the oil injection hole, and the periphery of the sealing ring of the connector is manually wiped, and whether there is kerosene leakage is judged according to the oil stain immersion of the wiping paper towel. However, this manual detection method has obvious defects. Not only is the detection efficiency low and the labor cost high, but the detection result is also easily affected by subjective factors, and there is a large error, which makes it difficult to ensure the accuracy and consistency of the detection, and cannot meet the increasing demand for high-quality detection of aviation connectors. SUMMARY
[0003] Therefore, the present application provides a sealing detection system to accurately detect the sealing performance of a device to be tested.
[0004] The sealing detection system according to the present application is used to detect the sealing performance of a device to be tested which encapsulates a fluid inside. The sealing detection system comprises a detection cavity, wherein the inside space of the detection cavity is arranged with the device to be tested; and a sensor, which is used to detect whether there is the fluid substance encapsulated in the device to be tested in the air of the inside space of the detection cavity.
[0005] Preferably, the sensor also detects the amount of the fluid substance encapsulated in the device to be tested in the air of the inside space of the detection cavity.
[0006] Preferably, the inside space of the detection cavity is a sealed space, and the sensor is directly arranged in the inside space of the detection cavity.
[0007] Preferably, the inside space of the detection cavity is communicated with a negative pressure device and is provided with an air inlet hole, and the sensor is arranged on a main air path between the inside space of the detection cavity and the negative pressure device.
[0008] Preferably, the sensor is connected in series on the main air path.
[0009] Preferably, the sensor is arranged on a detection air path parallel to the main air path, and a reduced diameter portion is arranged on the main air path in parallel with the sensor.
[0010] Preferably, the device to be detected is an aviation device, preferably an aviation connector; and the fluid enclosed in the device to be detected is a gas or a liquid, preferably kerosene.
[0011] Preferably, the detection system further comprises a detection cover, which is detachably arranged on the device to be detected, so that the leakage point of the device to be detected is located in the detection cavity.
[0012] Preferably, the detection cover comprises a cover body, which is annular and has an inner diameter larger than the outer diameter of the device to be detected; a first sealing member arranged at one end of the annular cover body and used for sealingly sleeving on the outer circumferential surface of the device to be detected; and a second sealing member arranged at the other end of the annular cover body and used for sealingly sleeving on the outer circumferential surface of the device to be detected; the cover body, the first sealing member and the second sealing member form the detection cavity with the device to be detected.
[0013] Preferably, the first sealing member and / or the second sealing member are made of elastic or flexible material, such as rubber.
[0014] Preferably, the sealing detection system comprises a fluid supply device for supplying fluid substances into a plurality of devices to be detected, which are arranged in parallel; and the sensor is a plurality of or a plurality of groups, each or each group of sensors is arranged corresponding to a respective device to be detected, for detecting the fluid substances enclosed in the respective device to be detected in parallel.
[0015] According to the technical solution of the present application, the beneficial effects are that a sealed detection cavity is arranged outside the device to be detected, and the sealing property of the device to be detected is judged by detecting the content of the fluid substances in the air in the sealed cavity through the sensor, which can accurately judge whether there is leakage.
[0016] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0017] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and the illustrative embodiments of the present application and their descriptions are used to explain the present application. In the drawings:
[0018] Figure 1 It is a schematic diagram of the overall system of the sealing detection system according to the present application.
[0019] Figure 2 It is a schematic diagram of the structure at the detection cavity of the sealing detection system according to the present application.
[0020] Figure 3 It is a schematic diagram of the connection structure of the detection gas circuit and the main gas circuit in the sealing detection system according to the present application.
[0021] Figure 4 Structure diagram of detection gas path in sealing detection system according to the present application.
[0022] Figure 5 Structure diagram of sealing detection system in good air tightness state according to the present application.
[0023] Figure 6 Structure diagram of sealing detection system in leakage state according to the present application.
[0024] Reference signs: A, device to be detected; 10, detection cavity; 11, sensor; 13, main gas path; 14, detection gas path; 15, necked part; 16, detection cover; 160, cover body; 161, first sealing member; 162, second sealing member; 163, air inlet hole; 165, fluid supply device; 166, backflow device; 167, storage tank; 168, control valve; 20, negative pressure device. DETAILED DESCRIPTION
[0025] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0026] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0027] As shown in Figure 1 and Figure 2 , it is a whole structure diagram of sealing detection system, which is used for detecting the sealing property of device A to be detected with fluid encapsulated inside; the sealing detection system comprises detection cavity 10, the inside space of which is arranged with the device A to be detected; and sensor 11, which is used for detecting whether there is fluid substance encapsulated inside the device A to be detected in the air of the inside space of the detection cavity 10.
[0028] The detection cavity 10 is arranged outside the device A to be detected, and the encapsulated fluid substance is detected by the sensor 11 arranged inside the detection cavity 10, so as to complete the air tightness detection of the device A to be detected.
[0029] The sensor 11 is also used for detecting the amount of fluid substance encapsulated in the inside space of the detection cavity 10. The sensor 11 can quantitatively analyze the fluid substance in the detection cavity, so as to judge the content of the fluid substance in the air, and further detect the air tightness of the device A to be detected and judge the leakage degree of the device A to be detected.
[0030] According to one embodiment, the internal space of the detection cavity 10 is a sealed space, and the sensor 11 is directly arranged in the internal space of the detection cavity; the internal space of the detection cavity 10 is closed in a manner selected by the sensor 11, so that the air or fluid in the internal space of the detection cavity 10 is detected by the sensor 11, the accuracy of detection is improved, and the device A to be detected is arranged in the internal space of the detection cavity 10, so that the leakage of the encapsulated fluid into the air is prevented, and the air is prevented from being polluted.
[0031] According to another embodiment, the internal space of the detection cavity 10 is communicated with a negative pressure device 20, and an air inlet hole 163 is arranged on the negative pressure device 20; the sensor 11 is arranged on the main gas path 13 between the internal space of the detection cavity 10 and the negative pressure device 20; as shown in the figure, a check valve is arranged at the air inlet hole 163, and the air inlet hole 163 is in an open state only when the negative pressure device 20 is started; by starting the negative pressure device, air is introduced into the air inlet hole 163 through the pressure difference, and the air in the detection cavity 10 is circulated, so that when the fluid to be detected in the detection cavity 10 flows through the main gas path, the fluid is detected by the sensor 11 arranged on the main gas path 13; when the gas in the detection cavity 10 is detected, not only the current air tightness detection result can be obtained, but also the air in the detection cavity 10 can be replaced, which lays a foundation for the air tightness detection in the future. Figure 1
[0032] Figure 3 Figure 4 Further, as shown in the figures, the sensor 11 is arranged on the detection gas path 14 in parallel with the main gas path 13, and an annular area is formed at the detection point of the sensor 11; when the negative pressure device 20 is started, the air in the detection cavity 10 is extracted, and the encapsulated fluid substance in the extracted air of the detection cavity 10 is detected by the sensor 11.
[0033] The main gas path 13 is provided with a reduced diameter portion 15 arranged in parallel with the sensor 11, and the neck portion 15 is arranged at the air inlet of the detection gas path 14; according to Bernoulli equation, the instantaneous flow at any interface in the same pipeline is the same; the smaller the pipe diameter, the smaller the fluid cross section, the faster the flow rate, and the smaller the pressure; the pressure at the air inlet of the detection gas path 14 is smaller than the pressure at the air outlet of the detection gas path 14, so that a self-circulation cycle is formed in the sensor detection gas path 14, and the accuracy of sensor detection is ensured.
[0034] The device A to be detected can be an aviation device, preferably an aviation connector; the fluid encapsulated in the device A to be detected is gas or liquid, preferably kerosene, which has volatility, and the kerosene sealing performance detection of the device to be detected is arranged in the accumulator.
[0035] As shown in Figure 2 The sealing detection system further comprises a detection cover 16 which is detachably arranged on the device A to be detected so that the leakage point of the device A to be detected is located in the detection cavity 10. The detection cover 16 covers the leakage point of the device A to be detected, so that even if the device A to be detected leaks, the leakage is into the detection cavity 10, and the detection cavity 10 is isolated from the outside air.
[0036] The detection cover 16 comprises a cover body 160 which is annular and has an inner diameter larger than the outer diameter of the device A to be detected, and covers the outside of the leakage point of the device A to be detected; a first sealing member 161 arranged at one end of the annular cover body 160 and used for sealingly sleeving the outer peripheral surface of the device A to be detected; and a second sealing member 162 arranged at the other end of the annular cover body 160 and used for sealingly sleeving the outer peripheral surface of the device A to be detected; the cover body 160, the first sealing member 161 and the second sealing member 162 form the detection cavity 10 with the device A to be detected.
[0037] An annular sealing member is arranged in the detection cover and at the leakage point of the device A to be detected, further sealing the device A to be detected, improving the sealing performance of the device A to be detected, and further preventing the leakage of the encapsulated fluid. The sealed detection cavity 10 is formed outside the sealing member, improving the accuracy of the detection of the fluid in the detection cavity 10. As shown in Figure 2 In this embodiment, the detection cover 16 only covers the possible leakage point of the device to be detected, and the remaining part is exposed, and the detection cover does not affect other functions of the device A to be detected.
[0038] The first sealing member 161 and / or the second sealing member 162 are made of elastic or flexible materials, such as rubber.
[0039] The device A to be detected in the sealing detection system can be multiple, and the sealing detection system comprises a fluid supply device 165 for supplying fluid substances to multiple devices A to be detected, and the multiple devices A to be detected are arranged in parallel; and the sensor 11 is multiple or multiple groups, each or each group of sensor 11 is arranged corresponding to the respective device A to be detected, for detecting the fluid substances encapsulated in the respective device A to be detected in parallel, and the sealing detection system can simultaneously detect the sealing performance of multiple devices A to be detected, improving the efficiency of the air tightness detection.
[0040] The fluid supply device 165 includes a tank containing the fluid to be detected, and an overflow valve, a check valve, a pressure regulating valve, a control switch and an accumulator are sequentially arranged on the main path connecting the tank and the device A to be detected. The overflow valve is used to prevent the system pressure from being too high, and automatically releases the excess pressure when the pressure exceeds the set value. The pressure regulating valve can accurately adjust the injection pressure according to the test requirements of different specifications of products. The accumulator plays a role in stabilizing the pressure fluctuation and maintaining the stable pressure for a period of time, providing a stable test environment for the seal detection. The control switch is preferably a hydraulic motor. The overflow valve, the pressure regulating valve and the control switch cooperate with each other to ensure the stability of the pressure inside the device A to be detected.
[0041] The tank containing the fluid to be detected is connected to a plurality of branches corresponding to a plurality of devices A to be detected. A control valve is arranged on the branch connecting the tank and the device A to be detected. The control valve is provided with three passages. The communication state of the corresponding passage can be controlled through the control valve. The passage between the tank and the device A to be detected is started to control the fluid flowing into the device A to be detected. The fluid is sealed in the device A to be detected by the sealing ring of the device A to be detected. The system further comprises a backflow device connected to the control valve of the plurality of branches for recycling the encapsulated fluid in the device A to be detected. When the fluid enters the device A to be detected, the control valve is closed. At this time, the fluid in the device A to be detected is in a closed state. At this time, the sealing detection of the device A to be detected is carried out. After the sealing detection is completed, the control valve is started to open the passage between the device A to be detected and the backflow device to recycle the encapsulated fluid. After the installation of the fluid supply device 165, the operator carefully checks the sealing of each connection part to ensure that the oil circuit and the gas circuit of the connector to be detected are correctly and firmly connected.
[0042] The tank is connected to the fluid supply device 165 and the backflow device 166. An exhaust valve is further arranged on the tank. The exhaust valve is arranged on the main gas path 13 and connected to the negative pressure device 20. Other overflow in the tank is discharged through the exhaust hole.
[0043] A filter is arranged on the main gas path 13 on the inlet side of the negative pressure device 20, and a check valve is arranged on the outlet side of the negative pressure device 20.
[0044] The air tightness detection system further comprises an oil injection and pressure adjusting module, a gas detection module, a data processing and analysis module, a display and alarm module and a control system.
[0045] The oil injection and pressure adjusting module can accurately adjust the oil injection pressure according to the test requirements of different specifications of products, control the pressure inside the device A to be detected within 0-2.5MPa, and ensure that the pressure fluctuation is ≤1%. The pressure sensor monitors the pressure change in the oil injection cavity in real time, feeds back the data to the control system, and maintains a stable test pressure for about 8min to provide a stable test environment for the seal detection.
[0046] Gas detection module: A plurality of high-sensitivity detection sensors are arranged on the periphery of the sealing ring of the device to be detected in the detection cavity 10, which detect the concentration of the encapsulated fluid.
[0047] In this application, environmental monitoring sensors can be arranged on the periphery of the detection cavity outside, which are also used to detect the concentration of the encapsulated fluid, and the data is recorded as C1; the data detected by the sensors arranged in the detection cavity is recorded as C2; all detection data is transmitted to the data processing and analysis module in real time.
[0048] Data processing and analysis module: receiving detection data C2 from the inside of the detection cavity, and comparing and analyzing it with detection data C1 of the periphery of the detection cavity outside in real time. Threshold judgment algorithm is adopted, when the value of C2-C1 is greater than the set concentration threshold, it is determined that there is leakage at the detection point; otherwise, it is determined that the detection point is well sealed. At the same time, the detection data is processed by using the data analysis model to remove abnormal data interference and improve the accuracy of the detection result.
[0049] Display and alarm module: the detection result of the data processing and analysis module is displayed on the display screen in the form of intuitive charts and texts, which is convenient for the operator to check. When the aviation connector is detected to have leakage, the audible and light alarm device is triggered immediately, and the display screen is marked to show which device under test has leakage, so that the operator can handle it in time.
[0050] Control system: as the core of the whole detection system, it is responsible for coordinating the work between modules. According to the detection requirements of different products, the parameters of the oil injection and pressurization module, aviation kerosene gas detection module, etc. are set; the data feedback from each module is received, and the system running state is monitored and adjusted in real time to ensure the stable and efficient operation of the detection system.
[0051] The method for detecting the air tightness of the device under test comprises the following steps: step one, starting the fluid supply device to control the detection fluid into the device under test; starting the negative pressure device to extract the gas in the detection cavity and make it enter the detection gas path for detection, and the detection data is C2; at the same time, the data C1 is recorded; step two, transmitting the data C1 and C2 to the data processing and analysis module, and comparing and analyzing C1 and C2; step three: setting the concentration threshold in the data processing and analysis module, comparing the comparison result of C1 and C2 with the threshold to obtain the detection result; step four; the display and alarm module receives the detection result of the data processing and analysis module in real time and responds in time.
[0052] Embodiment one:
[0053] As Figure 5As shown, when DUT A is properly sealed, the amount of encapsulation fluid in the air within the test cavity is minimal. During testing, the gas concentration C2 detected by the corresponding sensor remains essentially stable and is similar to the gas concentration C1 outside the test cavity, as detected by the environmental monitoring sensor. A time curve of concentration C2-C1, plotted with time on the horizontal axis and concentration on the vertical axis, shows a nearly horizontal line. For example, assuming an ambient concentration C1 of 5 ppm, C2 fluctuates slightly within the range of 4.8 to 5.2 ppm over an 8-minute test period, maintaining a stable overall curve. This indicates that no encapsulation fluid leaked from the DUT seal into the test cavity during testing, meeting the criteria for a good seal. This stable curve provides clear judgment for the data processing and analysis module: when the value of C2-C1 is less than a set threshold (e.g., 1 ppm), the connector can be determined to be properly sealed.
[0054] Implementation method 2:
[0055] like Figure 6 As shown, if DUT A has a sealing problem, over time, the encapsulating fluid will continue to evaporate from the leak point into the test cavity surrounding the seal ring, causing the concentration of the encapsulating fluid in the test cavity to gradually increase. In this case, the C2-C1 concentration curve plotted over time shows that the C2 value continues to rise over time, exhibiting a clear upward trend. For example, in the initial testing phase, C2 and C1 are close, both around 5 ppm. However, as time progresses, the C2 concentration may increase by 1 to 2 ppm every minute. Within an 8-minute test period, C2 rises from 5 ppm to 15 ppm or even higher. When the C2-C1 value exceeds a set concentration threshold (e.g., 1 ppm), the data processing and analysis module determines that the DUT has a leak. The slope and amplitude of the curve reflect the severity of the leak; a larger slope indicates a faster and more severe leak.
[0056] The preferred embodiments of the present application are described in detail above. However, the present application is not limited to the specific details of the above embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the scope of protection of the present application.
[0057] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner unless there is any contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.
[0058] Moreover, the various embodiments disclosed herein can be combined in any combination, provided such combinations do not violate the spirit of the application, which is to provide a method and system for providing a user with a personalized experience.
Claims
1. A sealing detection system for detecting the sealing of a device under test (A) encapsulating a fluid therein, the sealing detection system comprising: A detection cavity (10), wherein the device to be tested (A) is arranged in an internal space of the detection cavity (10); A sensor (11) is used to detect whether the fluid substance encapsulated in the device to be tested (A) exists in the air in the internal space of the detection cavity (10).
2. The seal detection system according to claim 1, wherein: The sensor (11) also detects the amount of the fluid substance encapsulated in the device to be tested (A) in the air in the internal space of the detection cavity (10).
3. The seal detection system according to claim 1, wherein: The internal space of the detection cavity (10) is a sealed space, and the sensor (11) is directly arranged in the internal space of the detection cavity (10).
4. The seal detection system according to claim 1, wherein: The internal space of the detection cavity (10) is connected to a negative pressure device (20) and is provided with an air inlet (163); the sensor (11) is provided on a main air path (13) between the internal space of the detection cavity (10) and the negative pressure device (20).
5. The seal detection system according to claim 4, wherein: The sensor (11) is connected in series to the main gas path (13).
6. The seal detection system according to claim 4, wherein: The sensor (11) is arranged on a detection gas path (14) connected in parallel with the main gas path (13), and a reduced diameter portion (15) arranged in parallel with the sensor (11) is provided on the main gas path (13).
7. The seal detection system according to claim 1, wherein: The device under test (A) is an aviation device, preferably an aviation connector; the fluid encapsulated in the device under test (A) is gas or liquid, preferably kerosene.
8. The seal detection system according to claim 1, wherein: Also includes: A detection cover (16) is detachably arranged on the device to be tested (A) so that the leakage point of the device to be tested (A) is located within the detection cavity (10).
9. The seal detection system according to claim 8, wherein: The detection cover (16) comprises: a cover (160) which is annular and has an inner diameter larger than the outer diameter of the device under test (A); a first sealing member (161), the first sealing member (161) being arranged at one end of the annular cover (160) and being used for sealingly sleeved on the outer peripheral surface of the device under test (A); and A second sealing member (162) is provided at the other end of the annular cover (160) and is used for sealingly sleeved on the outer peripheral surface of the device under test (A). The detection cavity (10) is formed between the cover (160), the first sealing member (161), the second sealing member (162) and the device to be tested (A). Preferably, the first sealing member (161) and / or the second sealing member (162) are made of an elastic or flexible material, such as rubber.
10. The sealing detection system according to any one of claims 1 to 9, wherein: The sealing detection system comprises a fluid supply device (165), the fluid supply device (165) is used to supply fluid material into a plurality of devices to be tested (A), the plurality of devices to be tested (A) are arranged in parallel; and The sensors (11) are multiple or in groups, and each sensor (11) or each group of sensors (11) is arranged corresponding to a respective device to be tested (A) and is used to detect fluid substances encapsulated in the respective device to be tested (A) in parallel.