Leakage detection test system for cabin door sealing element

Abstract

The invention discloses a leak detection test system for a cabin door sealing element. The leak detection test system comprises a visual sealing box, a gas supply mechanism, a temperature control system, a helium mass spectrometer and a DIC test system, an adjustable clamp used for fixing a sealing piece is installed in the visual sealing box, a loading head is installed in the visual sealing box and abuts against the sealing piece, and an inner cavity of the visual sealing box is divided into a high-pressure cabin and a low-pressure cabin by the loading head and the sealing piece; the air supply mechanism communicates with the hyperbaric cabin through a pipeline and is used for adjusting the air pressure of the hyperbaric cabin; the temperature control system is used for adjusting the temperature of the hyperbaric cabin; the helium mass spectrometer is communicated with the low-pressure cabin; and the D IC test system is used for capturing and analyzing the deformation condition of the sealing element. According to the invention, the deformation condition of the sealing element under different temperature and pressure conditions can be captured and analyzed, the sealing performance of the sealing element can be accurately evaluated, and the leak detection efficiency and accuracy of the sealing element are improved by comprehensively applying multiple technical means, so that the detection is more comprehensive and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of hatch door sealing, and in particular to a leak detection test system for a hatch door sealing member. Background Art

[0002] Hatch door seals are widely used in aerospace, marine engineering and other fields, and their sealing performance directly affects the safety and reliability of the cabin. As a key sealing component, hatch door seals not only play the role of isolating the environment inside and outside the cabin, but also have to cope with harsh conditions such as high pressure difference, extreme temperature changes, and corrosive media. Therefore, the sealing performance of hatch door seals needs to undergo rigorous testing and evaluation to ensure that they can meet the sealing requirements.

[0003] Traditional methods for detecting leaks in hatch seals mainly include water immersion detection, vacuum detection, and acoustic wave detection. The water immersion detection method determines leakage by observing bubbles. It is simple to operate, but it is difficult to quantitatively evaluate the leakage rate and cannot simulate a high-pressure difference environment. The vacuum method places the seal in a vacuum environment and determines whether there is a leak by detecting the pressure change outside the seal. This method has high accuracy, but the operation is complex and the cost is high. The acoustic wave detection method is suitable for long-distance detection but is easily interfered by environmental noise.

[0004] Although the above methods can detect the sealing performance of the hatch door seals to a certain extent, they all have certain limitations, especially in the simulation of high and low pressure environments, temperature control and dynamic sealing detection, making it difficult to comprehensively and accurately evaluate the performance of the hatch door seals.

[0005] Therefore, there is an urgent need for a hatch seal leak detection system that can simulate the actual working environment and perform comprehensive testing to improve the detection efficiency and accuracy of the seals. Summary of the invention

[0006] The object of the present invention is to provide a leak detection test system for a hatch door seal, aiming to solve or improve at least one of the above-mentioned technical problems.

[0007] To achieve the above object, the present invention provides the following solution: The present invention provides a leak detection test system for a hatch door seal, comprising:

[0008] A visible sealed box, wherein an adjustable clamp for fixing a seal is installed in the visible sealed box, wherein a loading head is installed in the visible sealed box, wherein the loading head abuts against the seal, and wherein the loading head and the seal separate the inner cavity of the visible sealed box into a high-pressure compartment and a low-pressure compartment;

[0009] an air supply mechanism, the air supply mechanism being in communication with the hyperbaric chamber via a pipeline and being used for adjusting the air pressure of the hyperbaric chamber;

[0010] A temperature control system, the temperature control system is used to adjust the temperature of the hyperbaric chamber;

[0011] a helium mass spectrometer, the helium mass spectrometer being in communication with the low-pressure cabin;

[0012] A DIC testing system, wherein the shooting end of the DIC testing system faces the visual sealing box, and is used to capture and analyze the deformation of the sealing component.

[0013] According to a leak detection test system for a hatch door seal provided by the present invention, the temperature control system comprises:

[0014] An electric heater installed on the pipeline;

[0015] A temperature sensor, the temperature sensor being mounted on the inner wall of the visible sealed box and located in the high pressure chamber;

[0016] A temperature controller, wherein the temperature sensor and the electric heater are both electrically connected to the temperature controller.

[0017] According to a leak detection test system for a hatch door seal provided by the present invention, the DIC test system comprises:

[0018] A light source assembly, the light source assembly facing the visible sealed box;

[0019] A CCD camera, wherein the shooting end of the CCD camera faces the visible sealed box;

[0020] The DIC acquisition device, the CCD camera is electrically connected to the DIC acquisition device.

[0021] According to a leak detection test system for a cabin door seal provided by the present invention, the air supply mechanism includes an external air source device and a pressure reducing valve, the air source device is connected to the high-pressure cabin through the pipeline, and the pressure reducing valve is installed on the pipeline and is located between the external air source device and the electric heater.

[0022] According to a leak detection test system for a hatch seal provided by the present invention, the visual sealing box comprises a U-shaped visual base and a sealing cover, the sealing cover is detachably connected to the top of the U-shaped visual base through a sealing plate; a sliding groove is provided on the inner bottom wall of the U-shaped visual base;

[0023] The loading head is fixedly mounted at the center of the bottom surface of the sealing cover, and the loading head and the sealing member separate the inner cavity of the U-shaped visual base into the high-pressure chamber and the low-pressure chamber; the light source assembly and the CCD camera face the U-shaped visual base; the temperature sensor is mounted on the inner wall of the U-shaped visual base and is located in the high-pressure chamber;

[0024] The adjustable clamp includes two guide blocks, both of which are slidably connected in the slide groove, a movable card slot is installed on the top of the guide block, the movable card slot is slidably connected to the inner bottom wall of the U-shaped visual base, a baffle is installed on the top of the movable card slot, and the seal is installed between the two baffles.

[0025] According to a leak detection test system for a cabin door seal provided by the present invention, a gas inlet and a sealed leak detection port are respectively provided on the two opposite side walls of the U-shaped visual base, the pipeline is connected to the high-pressure cabin through the gas inlet, and the helium mass spectrometer is connected to the low-pressure cabin through the sealed leak detection port.

[0026] According to a leak detection test system for a hatch seal provided by the present invention, the light source assembly includes at least two light source brackets, LED floodlights are installed on the light source brackets, both of the two LED floodlights are facing the visible sealing box, and the CCD camera is located between the two LED floodlights.

[0027] According to a leak detection test system for a hatch seal provided by the present invention, a plurality of mounting holes are provided on the sealing plate, the sealing cover and the U-shaped visible base, the mounting holes are used to install fastening bolts, and the sealing plate, the sealing cover and the U-shaped visible base are detachably connected by the plurality of fastening bolts.

[0028] According to a leak detection test system for a hatch seal provided by the present invention, the sealing plate, the U-shaped visible base and the inner wall surfaces of the sealing cover are all coated with liquid silicone rubber.

[0029] According to a leak detection test system for a hatch seal provided by the present invention, the U-shaped visual base comprises a box plate, an insulation plate is provided on the outer side of the box plate, and a side wall of the box plate is provided with visible tempered glass.

[0030] The present invention discloses the following technical effects:

[0031] The present invention can adjust the temperature and pressure of the high-pressure chamber in the visual sealing box through the air supply mechanism and the temperature control system to achieve the set test environment conditions, can simulate the actual sealing environment, improve the reliability and practicality of leak detection, and then quickly and effectively perform high-precision leak detection, and combine the test technology of the DIC test system to capture and analyze the deformation of the seal under different temperature and pressure conditions, and make an accurate assessment of the sealing performance of the seal, which can make up for the shortcomings of the existing technology in simulating the actual working environment, detection efficiency and accuracy, and improve the comprehensiveness and reliability of detection through the comprehensive application of multiple technical means;

[0032] The present invention can detect and record the air pressure in the low-pressure cabin in real time through a helium mass spectrometer, and can directly obtain the leakage of the seal, without having to calculate the leakage of the seal by recording the air pressure change of the sealing environment, thereby avoiding the tediousness and high error of testing the sealing performance of the sample, and improving the leakage detection efficiency and accuracy of the seal;

[0033] The present invention can adapt to seals of different types and sizes through the adjustable fixture, meeting a wide range of testing needs, which not only improves the applicability and versatility of the test, but also enhances the convenience and accuracy of tooling operation, ensuring stability under diverse testing conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a structural schematic diagram of the present invention;

[0036] Figure 2 The structure of the visible sealing box in the present invention is shown in FIG. Figure I ;

[0037] Figure 3 The structure of the visible sealing box in the present invention is shown in FIG. Figure II ;

[0038] Figure 4 It is a structural schematic diagram of the adjustable clamp in the present invention;

[0039] Figure 5 It is a schematic diagram of the installation of the box plate and the insulation plate in the present invention.

[0040] Among them, 1. external gas source device; 2. pressure reducing valve; 3. temperature control system; 31. electric heater; 32. temperature controller; 33. temperature sensor; 4. visual sealing box; 41. sealing plate; 42. sealing cover; 421. loading head; 43. U-shaped visual base; 431. sealed leak detection port; 432. gas inlet; 433. mounting hole; 434. slide groove; 435. movable card slot; 436. guide block; 437. baffle; 438. box plate; 439. insulation board; 44. seal; 45. high-pressure chamber; 46. low-pressure chamber; 5. helium mass spectrometer; 6. DIC test system; 61. DIC acquisition equipment; 62. LED floodlight; 63. CCD camera. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Reference Figure 1-Figure 5 The present invention provides a leak detection test system for a hatch door seal, comprising:

[0044] A visible sealed box 4 is installed with an adjustable clamp for fixing a seal 44, a loading head 421 is installed in the visible sealed box 4, the loading head 421 abuts against the seal 44, and the loading head 421 and the seal 44 separate the inner cavity of the visible sealed box 4 into a high-pressure chamber 45 and a low-pressure chamber 46; the visible sealed box 4 is used to carry and install the seal 44 to be tested and provide a test space;

[0045] An air supply mechanism, the air supply mechanism is connected to the high-pressure chamber 45 through a pipeline, and is used to adjust the air pressure of the high-pressure chamber 45;

[0046] A temperature control system 3, the temperature control system 3 is used to adjust the temperature of the high pressure chamber 45;

[0047] A helium mass spectrometer 5, which is connected to the low-pressure chamber 46; the helium mass spectrometer 5 realizes high-precision detection of gas leakage;

[0048] A DIC testing system 6, wherein the shooting end of the DIC testing system 6 faces the visual sealing box 4, and is used to capture and analyze the deformation of the sealing member 44;

[0049] With such arrangement, the present invention can adjust the temperature and pressure of the high-pressure chamber 45 in the visual sealing box 4 through the air supply mechanism and the temperature control system 3, so that it reaches the set test environment conditions, can simulate the actual sealing environment, improve the reliability and practicality of leak detection, and then quickly and effectively perform high-precision leak detection, and combine the test technology of the DIC test system 6 to capture and analyze the deformation of the seal 44 under different temperature and pressure conditions, and make an accurate assessment of the sealing performance of the seal 44, which can make up for the shortcomings of the existing technology in simulating the actual working environment, detection efficiency and accuracy, and improve the comprehensiveness and reliability of detection through the comprehensive application of multiple technical means;

[0050] The present invention can detect and record the air pressure in the low-pressure cabin 46 in real time through the helium mass spectrometer 5, and can directly obtain the leakage of the seal 44, without having to calculate the leakage of the seal 44 by recording the air pressure change of the sealing environment, thereby avoiding the cumbersome and high error of detecting the sealing performance of the sample, and improving the leak detection efficiency and accuracy of the seal 44;

[0051] The present invention can adapt to seals 44 of different types and sizes through an adjustable fixture to meet a wide range of testing needs, which not only improves the applicability and versatility of the test, but also enhances the convenience and accuracy of tooling operation, ensuring stability under diverse testing conditions.

[0052] Further optimizing the scheme, the temperature control system 3 includes:

[0053] An electric heater 31 is installed on the pipeline; the electric heater 31 is used to heat the test gas to meet the temperature requirements of the test;

[0054] A temperature sensor 33, the temperature sensor 33 is mounted on the inner wall of the visible sealing box 4 and is located in the high pressure chamber 45;

[0055] The temperature controller 32, the temperature sensor 33 and the electric heater 31 are all electrically connected to the temperature controller 32;

[0056] With this arrangement, the temperature controller 32 monitors and adjusts the temperature in the visible sealed box 4 in real time through the feedback of the temperature sensor 33 to ensure that the system operates stably within the set range. The temperature sensor 33 is attached to the inner wall of the high-pressure chamber 45 of the visible sealed box 4 by high-temperature resistant glue.

[0057] To further optimize the solution, the DIC test system 6 includes:

[0058] A light source assembly, the light source assembly faces the visible sealing box 4;

[0059] A CCD camera 63, wherein the shooting end of the CCD camera 63 faces the visible sealing box 4;

[0060] The DIC acquisition device 61 and the CCD camera 63 are electrically connected to the DIC acquisition device 61 .

[0061] According to a further optimized solution, the gas supply mechanism includes an external gas source device 1 and a pressure reducing valve 2. The gas source device is connected to the high-pressure chamber 45 through a pipeline. The pressure reducing valve 2 is installed on the pipeline and is located between the external gas source device 1 and the electric heater 31.

[0062] According to a further optimized solution, the visible sealed box 4 includes a U-shaped visible base 43 and a sealing cover 42. The sealing cover 42 is detachably connected to the top of the U-shaped visible base 43 through a sealing plate 41. A sliding groove 434 is provided on the inner bottom wall of the U-shaped visible base 43.

[0063] The loading head 421 is fixedly mounted at the center of the bottom surface of the sealing cover 42. The loading head 421 and the sealing member 44 separate the inner cavity of the U-shaped visual base 43 into a high-pressure chamber 45 and a low-pressure chamber 46. The light source assembly and the CCD camera 63 face the U-shaped visual base 43. The temperature sensor 33 is mounted on the inner wall of the U-shaped visual base 43 and is located in the high-pressure chamber 45.

[0064] The adjustable clamp includes two guide blocks 436, both of which are slidably connected in the slide groove 434, and a movable card slot 435 is fixedly installed on the top of the guide block 436 by bolts, and the movable card slot 435 is slidably connected to the inner bottom wall of the U-shaped visual base 43, and a baffle 437 is installed on the top of the movable card slot 435, and the sealing member 44 is installed between the two baffles 437; the positions of the two baffles 437 are fixed by pouring liquid silicone rubber and waiting for it to solidify;

[0065] By adjusting the spacing of the movable card slots 435 to adapt to different types and sizes of seal 44 bases, the baffle 437 is used to prevent the seal 44 from being deformed too much due to excessive air pressure, thereby causing seal failure, which is in line with the situation in the cabin during the actual application of the seal 44.

[0066] To further optimize the solution, a gas inlet 432 and a sealed leak detection port 431 are respectively provided on the two opposite side walls of the U-shaped visual base 43, the pipeline is connected to the high-pressure chamber 45 through the gas inlet 432, and the helium mass spectrometer 5 is connected to the low-pressure chamber 46 through the sealed leak detection port 431.

[0067] According to a further optimization scheme, the light source assembly includes at least two light source brackets, on which LED floodlights 62 are installed. Both LED floodlights 62 face the visible sealed box 4 , and the CCD camera 63 is located between the two LED floodlights 62 .

[0068] According to a further optimization scheme, a plurality of mounting holes 433 are provided on the sealing plate 41, the sealing cover 42 and the U-shaped visible base 43. The mounting holes 433 are used to install fastening bolts. The sealing plate 41, the sealing cover 42 and the U-shaped visible base 43 are detachably connected by the plurality of fastening bolts.

[0069] According to a further optimized solution, the inner wall surfaces of the sealing plate 41 , the U-shaped visible base 43 and the sealing cover 42 are all coated with liquid silicone rubber.

[0070] Further optimized solution, the U-shaped visual base 43 includes a box plate 438, an insulation plate 439 is provided on the outside of the box plate 438, and a side wall of the box plate 438 of the U-shaped visual base 43 is provided with visible tempered glass;

[0071] The sealing cover 42 includes a box plate 438, and a heat preservation plate 439 is provided on the outer side of the box plate 438; the heat preservation plate 439 is used to keep the internal temperature stable and reduce the loss of heat;

[0072] The DIC testing system 6 directly observes and captures the surface deformation of the seal 44 through the visible tempered glass.

[0073] To further optimize the solution, the gas in the external gas source device 1 is helium, which is used to provide the fluid required for the test. The output controllable parameter is the fluid pressure. The pressure reducing valve 2 controls the pressure upstream of the pipeline to match the actual test pressure downstream.

[0074] As a further optimization scheme, several groups of loading heads 421 are provided, and the lengths of the several groups of loading heads 421 are different, so as to compare the influence of different compression amounts on the sealing performance of the sealing element 44 and determine the optimal compression amount.

[0075] To further optimize the solution, the helium mass spectrometer 5 is installed on a cart for easy mobility. The helium mass spectrometer 5 has a suction gun and vacuum leak detection mode, which can meet the leakage rate detection required in the air tightness test.

[0076] According to a further optimized solution, the gas inlet 432 and the sealed leak detection port 431 are connected to the pipeline by quick connectors.

[0077] The present invention also provides a method for using the leak detection test system for a hatch seal, comprising the following steps:

[0078] Step 1: Spray a number of black paint identification points on the front end of the seal 44. After the paint is dry, adjust the movable card slot 435 at the lower end of the U-shaped visual base 43, put the seal 44 between the two movable card slots 435, and the side of the seal 44 with the black paint identification point faces the CCD camera 63. The seal cover 42 with the loading head 421 presses the seal 44 and the U-shaped visual base 43 to be threadedly connected. The rear sealing plate 41 is threadedly connected to the U-shaped visual base 43 and the sealing cover 42, and the front sealing plate 41 is not connected. Then, the rear sealing plate 41 is placed parallel to the desktop, and the high pressure of the visual sealing box 4 is pressed. Pour 25g of liquid silicone rubber into the chamber 45 and the low-pressure chamber 46 respectively, wait for it to solidify, then pour 25g of liquid silicone rubber into the high-pressure chamber 45 and the low-pressure chamber 46 respectively, thread the front sealing plate 41 with the U-shaped visual base 43 and the sealing cover 42, rotate the visual sealing box 4 270° counterclockwise, and the liquid silicone rubber flows through the sealing cover 42 to the inside of the front sealing plate 41, so that the connection gap of the visual sealing box 4 is completely sealed, ensuring that the sealing leakage channel only exists between the loading head 421 and the sealing member 44, wait for the liquid silicone rubber in the visual sealing box 4 to be completely solidified, and then proceed to the next step;

[0079] Step 2, connect the external gas source device 1 to the air inlet end of the electric heater 31 through the pressure reducing valve 2, connect the air outlet end of the electric heater 31 to the high-pressure chamber 45, connect the helium mass spectrometer 5 to the low-pressure chamber 46 through the sealed leak detection port 431, install the temperature sensor 33 in the high-pressure chamber 45 of the visible sealed box 4, connect one end of the temperature controller 32 to the electric heater 31, and connect the other end to the temperature sensor 33, place the CCD camera 63 right in front of the visible sealed box 4 and connect it to the DIC acquisition device 61, and place the LED floodlights 62 on the left and right sides between the visible sealed box 4 and the CCD camera 63;

[0080] Step 3: Open the valve of the external gas source device 1, adjust the pressure through the pressure reducing valve 2, and let the gas pass into the electric heater 31 to reach the set temperature. The gas that reaches the set test environment condition is passed into the high pressure chamber 45. The temperature controller 32 keeps the gas temperature constant through the feedback of the temperature sensor 33 in the high pressure chamber 45. Start the helium mass spectrometer 5. After the test state is stable, keep the pressure for 5 minutes; at the same time, turn on the LED floodlight 62, CCD camera 63 and DIC acquisition device 61, adjust the focal length of the CCD camera 63 to make the image clear, and connect the CCD camera 63 to the DIC acquisition device 61 for image acquisition;

[0081] Step 4: If there is a gap between the loading head 421 and the seal 44, the test gas can flow from the high-pressure chamber 45 into the low-pressure chamber 46 through the gap. The helium mass spectrometer 5 can detect the leakage rate of the seal 44 under different temperature and pressure environments. The DIC test system 6 can capture and analyze the deformation of the seal. Through the comprehensive application of technology, the sealing performance of the seal 44 to be tested can be accurately evaluated after analyzing the data.

[0082] Step 5: After the test is completed, turn off the external gas source device 1, the temperature control system 3, the helium mass spectrometer 5, the DIC test system 6 and cut off all power supplies, and record and save the test data.

[0083] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0084] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technical users in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A leak detection test system for a hatch seal, characterized in that: include: A visible sealed box (4), wherein an adjustable clamp for fixing a sealing member (44) is installed in the visible sealed box (4), wherein a loading head (421) is installed in the visible sealed box (4), wherein the loading head (421) abuts against the sealing member (44), and wherein the loading head (421) and the sealing member (44) separate the inner cavity of the visible sealed box (4) into a high-pressure chamber (45) and a low-pressure chamber (46); an air supply mechanism, the air supply mechanism being in communication with the high-pressure chamber (45) through a pipeline and being used for adjusting the air pressure of the high-pressure chamber (45); a temperature control system (3), the temperature control system (3) being used to adjust the temperature of the hyperbaric chamber (45); a helium mass spectrometer (5), the helium mass spectrometer (5) being in communication with the low-pressure chamber (46); A DIC testing system (6), wherein the photographing end of the DIC testing system (6) faces the visual sealing box (4) and is used to capture and analyze the deformation of the sealing member (44).

2. The leak detection test system for a hatch door seal according to claim 1, characterized in that: The temperature control system (3) comprises: An electric heater (31), the electric heater (31) being installed on the pipeline; a temperature sensor (33), the temperature sensor (33) being mounted on the inner wall of the visible sealed box (4) and located in the high-pressure chamber (45); The temperature controller (32), the temperature sensor (33) and the electric heater (31) are all electrically connected to the temperature controller (32).

3. The leak detection test system for a hatch door seal according to claim 2, characterized in that: The DIC testing system (6) comprises: A light source assembly, the light source assembly facing the visible sealed box (4); A CCD camera (63), wherein the photographing end of the CCD camera (63) faces the visible sealed box (4); The DIC acquisition device (61), the CCD camera (63) is electrically connected to the DIC acquisition device (61).

4. The leak detection test system for a hatch door seal according to claim 3, characterized in that: The gas supply mechanism comprises an external gas source device (1) and a pressure reducing valve (2); the gas source device is connected to the high-pressure chamber (45) via the pipeline; the pressure reducing valve (2) is installed on the pipeline and is located between the external gas source device (1) and the electric heater (31).

5. The leak detection test system for a hatch door seal according to claim 4, characterized in that: The visual sealed box (4) comprises a U-shaped visual base (43) and a sealing cover (42), wherein the sealing cover (42) is detachably connected to the top of the U-shaped visual base (43) via a sealing plate (41); a sliding groove (434) is provided on the inner bottom wall of the U-shaped visual base (43); The loading head (421) is fixedly mounted at the center of the bottom surface of the sealing cover (42); the loading head (421) and the sealing member (44) separate the inner cavity of the U-shaped visual base (43) into the high-pressure chamber (45) and the low-pressure chamber (46); the light source assembly and the CCD camera (63) face the U-shaped visual base (43); the temperature sensor (33) is mounted on the inner wall of the U-shaped visual base (43) and is located in the high-pressure chamber (45); The adjustable clamp comprises two guide blocks (436), both of which are slidably connected in the slide groove (434), a movable card slot (435) is installed on the top of the guide block (436), and the movable card slot (435) is slidably connected to the inner bottom wall of the U-shaped visual base (43), a baffle (437) is installed on the top of the movable card slot (435), and the sealing member (44) is installed between the two baffles (437).

6. The leak detection test system for a hatch door seal according to claim 5, characterized in that: The U-shaped visual base (43) is provided with a gas inlet (432) and a sealed leak detection port (431) on two opposite side walls, respectively; the pipeline is connected to the high-pressure chamber (45) through the gas inlet (432); and the helium mass spectrometer (5) is connected to the low-pressure chamber (46) through the sealed leak detection port (431).

7. The leak detection test system for a hatch door seal according to claim 3, characterized in that: The light source assembly comprises at least two light source brackets, on which LED floodlights (62) are mounted, the two LED floodlights (62) both facing the visible sealed box (4), and the CCD camera (63) is located between the two LED floodlights (62).

8. The leak detection test system for a hatch door seal according to claim 5, characterized in that: The sealing plate (41), the sealing cover (42) and the U-shaped visual base (43) are all provided with a plurality of mounting holes (433), and the mounting holes (433) are used to install fastening bolts, and the sealing plate (41), the sealing cover (42) and the U-shaped visual base (43) are detachably connected via the plurality of fastening bolts.

9. The leak detection test system for a hatch door seal according to claim 5, characterized in that: The inner wall surfaces of the sealing plate (41), the U-shaped visible base (43) and the sealing cover (42) are all coated with liquid silicone rubber.

10. The leak detection test system for a hatch door seal according to claim 5, characterized in that: The U-shaped visual base (43) comprises a box plate (438), a heat preservation plate (439) is arranged on the outer side of the box plate (438), and a side wall of the box plate (438) is provided with visual tempered glass.

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