A clean plant air duct air leakage detection auxiliary system and detection method

Abstract

The present application relates to the technical field of clean engineering detection, in particular to a kind of auxiliary system and detection method for detecting air leakage of clean workshop air pipe.The auxiliary system includes a pipeline air leakage testing machine, one end of the pipeline air leakage testing machine is connected to a multi-wheel picking access assembly through a total air inlet pipe, the multi-wheel picking access assembly is distributed with several branch detection mechanisms, a quick sealing connection structure is provided between the branch detection mechanism and the air pipe to be detected, and the branch detection mechanism includes a state indicator, a switching valve group and an air inlet pipe.The setting of multiple sets of quick plug-in connectors can connect multiple positions of a single pipe, collect data of the single pipe, facilitate positioning of the leakage position, the setting of multiple sets of quick plug-in connectors can connect multiple pipes, and detect the multiple pipes, the setting of a sealing ring can guide the flow of gas, ensure the sealing property of the connecting position, and locate the leakage interval.

Description

Technical Field

[0001] This invention relates to the field of cleanroom engineering testing technology, specifically to an auxiliary system and testing method for detecting air leakage in cleanroom ductwork. Background Technology

[0002] During the construction of cleanrooms, leakage testing is required after the duct system is installed to verify whether the airtightness of the duct system meets the cleanliness level requirements. Current technology typically uses portable leakage detectors to test the ducts point by point.

[0003] However, existing technologies have the following drawbacks: limited detection interfaces and low construction efficiency. Current air leakage detectors typically only have a single detection interface. When inspecting different duct sections, the detector must be connected to each section and inspected segment by segment. This process requires repeated disassembly and reassembly of the equipment, consuming significant labor and time. Furthermore, existing air leakage detectors can only obtain overall air leakage data for the duct, failing to pinpoint the location of leaks within specific sections. This lack of targeted approach to subsequent repairs further reduces construction efficiency.

[0004] Therefore, it is necessary to provide an auxiliary system for duct leakage detection that can achieve multi-point synchronous detection and leakage zone location without modifying existing detection instruments. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an auxiliary system and method for detecting air leakage in cleanroom ducts. The system, through the setting of several branch detection mechanisms in the multi-round detection access component, can connect to multiple detection nodes of a single duct under test, realize multi-point synchronous detection and data comparison, and thus locate the leakage range.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: The invention includes a pipeline leakage testing machine, characterized in that the outlet end of the pipeline leakage testing machine is connected to a main air inlet pipe, and the end of the main air inlet pipe is connected to a multi-round inspection access component, the multi-round inspection access component including N branch inspection mechanisms, where N≥2; The branch detection mechanism includes: An air intake duct, one end of which can be selectively connected to the main air intake duct, and the other end of which is used to connect to the air duct to be tested; A solenoid valve is installed between the main air intake pipe and the air intake duct to control the air passage opening and closing of the corresponding branch. Status indicator lights are provided corresponding to the solenoid valves to indicate the working status of the corresponding branch. The branch detection mechanism is provided with a quick-sealing connection structure at the docking position with the air duct to be tested, and the quick-sealing connection structure includes: Quick-connect fittings are fixedly installed on the wall of the duct to be tested; A quick-connect fitting is located at the free distal end of the air intake duct and is detachably and sealed to the quick-connect fitting.

[0007] The technical solution of the present invention achieves the following beneficial technical effects: First, by setting up several branch detection mechanisms in the multi-round inspection access component, multiple detection nodes of a single duct under test can be simultaneously connected to the pipeline leakage tester to achieve multi-point synchronous detection; the pressure sensors of each branch will collect their respective detection data to the control system for comparison, which facilitates accurate location of the leakage range.

[0008] Secondly, by setting the sealing ring, the gas in the duct under test can be guided, and the gas pressure in the duct under test can be used to squeeze the sealing ring to apply radial pressure, thereby enhancing the sealing effect at the docking position; at the same time, the sealing cavity in the sealing ring can sensitively respond to changes in the gas flow state in the duct.

[0009] Third, by detecting the spring, the gas pressure inside the sealed cavity is converted into mechanical force that is transmitted to the pressure sensor, thus achieving reliable acquisition of the pressure signal. By utilizing the correspondence between the pressure change in the sealed cavity and the gas flow rate in the duct (the gas flow rate is fast near the leak, the sealed cavity discharges more gas and the pressure change is small; the gas flow rate is slow far from the leak, the sealed cavity discharges less gas and the pressure change is large), the leak location can be locked to the corresponding detection node area by comparing the detection values ​​of multiple pressure sensors.

[0010] Fourth, through the setting of the control system, the automated rotation control of the solenoid valves of each branch, the centralized acquisition and processing of pressure signals, the automatic determination of the leakage location, and the linkage indication of the status indicator light are realized, which significantly improves the automation level of the detection process and the intuitiveness of the detection results. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the working state of the multi-round detection access component of the present invention; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction; Figure 3 for Figure 2 Enlarged schematic diagram of a local structure in the middle; Figure 4 This is a schematic diagram of the gas flow state inside the duct to be tested according to the present invention; Figure 5 This is a schematic diagram of the detection system module of the present invention; Figure 6 This is a schematic diagram of the visual interface of the present invention.

[0012] The reference numerals in the diagram represent: 1. Duct under test; 2. Main air intake duct; 3. Multi-round inspection connection assembly; 4. Status indicator light; 5. Piston block; 6. Air intake duct; 7. Pressure sensor; 8. Solenoid valve; 9. Quick-connect connector; 10. Quick-connect mating part; 11. Sealing ring; 12. Sealing cavity; 13. Right-angle channel; 14. Connecting channel; 15. Adjusting bolt; 16. Detection spring. Detailed Implementation

[0013] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0014] Overall structure of multi-round detection access component As attached Figure 1 As shown, the multi-round inspection access component 3 is used to connect to the pipeline leakage testing machine. The pipeline leakage testing machine is existing equipment, and this invention does not modify it, but only utilizes its air supply detection function. The pipeline leakage testing machine comes with a fan and an air outlet, which is installed on the main air inlet pipe 2 of this invention. The end of the main air inlet pipe 2 is connected to the multi-round inspection access component 3.

[0015] Existing pipe leakage testing machines only have a single external pipeline and can only test one detection point at a time, limiting their application scenarios and testing efficiency. This invention, by setting up a multi-round inspection access component 3, can simultaneously connect multiple detection nodes of the same duct under test 1, realizing multi-point synchronous detection and data comparison, thereby locating the leakage range; it can also simultaneously connect multiple independent ducts under test 1, realizing simultaneous detection of multiple ducts.

[0016] The multi-round inspection access component 3 has N groups of branch inspection mechanisms (N≥2), and each group is numbered sequentially from 1 to N. (See attached diagram) Figure 1 As shown, each branch's air intake duct 6 is connected to the main air intake duct 2 via a corresponding solenoid valve 8. The solenoid valve 8 is an integrated on / off control element; its valve body is located between the main air intake duct 2 and the air intake duct 6, and is used to control the airflow of the corresponding branch. The solenoid valve 8 is controlled by electrical signals from the control system, enabling automatic switching or selective on / off of each branch. Status indicator lights 4 are positioned above each branch's solenoid valve 8 to indicate the working status of the corresponding branch. The status indicator lights 4 are preferably made of light-emitting diodes and have multiple colors; different colors represent different working states. For example, blue indicates normal airflow, green indicates the branch is open, and red indicates air leakage at the corresponding detection node.

[0017] The basic principle of air leakage detection is as follows: air is injected into a leaking container. Once the pressure inside the container stabilizes, the air supply flow rate required to maintain that pressure is equal to the leakage flow rate of the container. A flow meter is installed on the main air inlet pipe 2. Once the air pressure inside the test duct 1 stabilizes, the air leakage rate can be obtained by measuring the air supply flow rate of the test duct 1.

[0018] The above describes the basic principle of air leakage detection, and this invention does not modify this principle. It should be noted that the duct under test 1 must be sealed at both ends before testing. Specifically, this can be achieved by installing sealing plates at both ends of the duct under test 1, or by utilizing valves / valve plates pre-installed in the design phase of the duct under test 1, which are opened during normal operation and closed during testing to achieve sealing at both ends.

[0019] As attached Figure 3 As shown, a quick-connect connector 9 is connected to the end of the air intake duct 6, and a quick-connect fitting 10 is fixedly installed on the wall of the air duct 1 to be tested. Specifically, a circular hole is opened on the air duct 1 to be tested, and a quick-connect fitting 10 with a diameter adapted to the circular hole is welded on the circular hole. In order to ensure the sealing of the quick-connect fitting 10 when no gas is input, a corresponding valve needs to be installed inside the quick-connect fitting 10. The valve is equipped with a spring, which automatically closes when no gas is input, and opens under the action of airflow when gas is input. The specific principle is similar to a one-way valve in a sewer. The quick-connect connector 9 and the quick-connect fitting 10 adopt a detachable sealing connection method (such as snap-fit ​​or threaded connection) to realize the quick connection between the air intake duct 6 and the air duct 1 to be tested.

[0020] The quick-connect connector 9 has a right-angle channel 13 inside. One end of the right-angle channel 13 is connected to the inside of the air intake duct 6, and the other end is connected to the inside of the air duct 1 to be tested when the quick-connect connector 9 is connected to the quick-connect fitting 10. A sealing ring 11 is installed at the position where the right-angle channel 13 and the quick-connect fitting 10 are in contact. The sealing ring 11 is made of elastic memory material (such as memory rubber), which can be squeezed and deformed and automatically reset, and can be reused.

[0021] The outer diameter of the sealing ring 11 extending outside the port of the right-angle channel 13 is smaller than its outer diameter inside the right-angle channel 13. The outer wall of the sealing ring 11 is attached to the inner wall of the right-angle channel, and the attachment position is bonded together with glue. A closed annular cavity is formed inside the wall of the sealing ring 11, which serves as the sealing cavity 12. One end of the sealing cavity 12 is connected to a position detection mechanism. The sealing ring 11 has a dual function: on the one hand, it guides the airflow in the air duct 1 under test at an angle to prevent gas turbulence; on the other hand, the gas pressure in the air duct 1 under test can squeeze the sealing ring 11 to squeeze the relative connection position of the quick-connect connector 9 and the quick-connect mating part 10, thereby enhancing the sealing effect at the mating position.

[0022] In this invention, the position detection mechanism generates a detectable signal in response to changes in gas pressure within the sealed cavity 12. (See attached diagram.) Figure 3 As shown, a connecting channel 14 is provided on one side of the quick-connect connector 9, and the bottom of the connecting channel 14 is connected to the sealing cavity 12. A piston block 5 is slidably disposed inside the connecting channel 14, and the edge of the piston block slides and seals against the inner wall of the connecting channel 14. A detection spring 16 is provided on the side of the piston block 5 away from the sealing cavity 12, and one end of the detection spring 16 abuts against the piston block 5. A pressure sensor 7 is installed on the side of the detection spring 16 away from the piston block 5, which is used to detect the pressure on the detection spring 16 and output a corresponding electrical signal. The pressure sensor 7 is electrically connected to the control system and the status indicator 4.

[0023] The piston block 5 has its side facing away from the inside of the connecting channel 14 connected to the outside atmosphere, so that the high-pressure gas in the sealed cavity 12 can push the piston block 5 to slide within the connecting channel 14. An adjusting bolt 15 is also threadedly connected to the port of the connecting channel 14, and the pressure sensor 7 is fixed to the end of the adjusting bolt 15.

[0024] As attached Figure 4 As shown, in the initial stage of gas supply, gas is used to fill the test duct 1. After the gas filling of the test duct 1 is completed, if there is a leak point, the gas inside the test duct 1 will flow towards the leak point. The gas flow velocity is faster at the quick-connect fitting 9 near the leak point and slower at the quick-connect fitting 9 further away from the leak point.

[0025] For the sealing cavity 12, which is far from the leak point, the gas flow rate in the duct is slow and the gas discharge capacity is limited. The pressure in the duct gradually increases, and the pressure near the sealing ring 11 rises accordingly, which disrupts the pressure balance in the sealing cavity 12. This causes the sealing ring 11 to deform. The gas in the sealing cavity 12 is compressed and then pushes the piston block 5 to move through the connecting channel 14, thereby compressing the detection spring 16. The pressure sensor 7 detects a large pressure signal.

[0026] For the sealing cavity 12 near the leak point, since the gas in the duct flows out quickly to the leak point, the quick-connect fitting 9 needs to replenish the gas in the duct more quickly. The pressure in the duct is less affected, the pressure change accumulated at the sealing ring 11 is small, the gas discharged from the sealing cavity 12 is less, and the pressure sensor 7 detects a small pressure signal.

[0027] Therefore, after the tested duct 1 enters the pressure-holding state, the pressure values ​​detected by each branch pressure sensor 7 are positively correlated with the distance of the corresponding detection node from the leak point—the farther away from the leak point, the greater the degree of compression of the detection spring 16, and the higher the detected value of the pressure sensor 7; the closer to the leak point, the lower the pressure on the sealing cavity 12, the less the degree of compression of the detection spring 16, and the lower the detected value of the pressure sensor 7. Thus, by comparing the detected values ​​of each branch pressure sensor 7 on the same tested duct 1, the leak location can be pinpointed to one or more branch detection node areas with the lowest detected values.

[0028] During the initial gas supply and pressure holding phases, the changes in the detected values ​​of pressure sensors 7 differ: in the initial gas supply phase, each pressure sensor 7 shows only slight changes before stabilizing; however, once the pressure holding phase begins, the detected values ​​of each pressure sensor begin to show significant divergence. The difference in the magnitude of change between the two phases is significant and easily distinguishable.

[0029] The present invention also includes a control system housed within the multi-round inspection access component 3. The control system is electrically connected to each solenoid valve 8, each pressure sensor 7, and each status indicator light 4. The control system is configured to receive electrical signals output by each pressure sensor 7, determine the branch detection node area where the leak is located based on the relative magnitudes of the electrical signals, and drive the corresponding status indicator light 4 to issue a leak warning signal based on the determination result. For example, when a branch is determined to be a leaking area, the control system drives the status indicator light 4 of that branch to turn red to alert the operator.

[0030] With technical support, the status indicator 4 can be a light-emitting diode capable of displaying multiple colors and brightness levels. The control system can drive the status indicator 4 to display different color depths according to the detection value of the pressure sensor 7—the smaller the detection value (closer to the leak point), the darker the red; the larger the detection value (farther from the leak point), the lighter the red, thus achieving a more intuitive display of the degree of air leakage.

[0031] When the pressure sensor readings at two or more branch locations are all at their minimum values ​​and the differences between them are within the allowable error range, the control system can determine that these multiple locations are air leakage areas and drive multiple status indicator lights 4 to display a red warning.

[0032] When multiple status indicator lights 4 are all red and the pressure difference between them is small, the control system can verify the situation by closing the solenoid valves 8 of some branches: keep the solenoid valve 8 of the branch displaying red open, close the other branches, record the pressure values ​​of each branch and compare them; if the pressure value difference of each branch displaying red is still small, it is determined that there is a leak at multiple points; if the pressure value of one branch is significantly greater than that of other branches, the branch with the lowest pressure value is determined as the leak point.

[0033] In one embodiment of the present invention, as described in the appendix to the specification... Figure 5 As shown, to achieve automated and information-based management of the testing process, the control system can also integrate the following functional modules: The branch rotation control module controls the solenoid valves 8 in the multi-branch inspection access component 3 to rotate and switch according to a preset sequence or manual command, allowing the pipeline leakage tester to sequentially test different branches. Operators can interact with the control system via the display screen; for example, by selecting to open the solenoid valve 8 of a specific branch on the screen, the control system sends an electrical signal to drive the solenoid valve 8 to open.

[0034] Duct Area Identification Module: This module uniquely identifies each inspection node and establishes a correspondence between the inspection node and the duct area. Identification methods include QR code identification, electronic tags, or coded identification, enabling identifiable management of duct inspection objects.

[0035] Detection result acquisition module: Used to collect the detection output results of each branch detection agency. In one embodiment, the display screen data of the pipeline leakage tester is acquired through image acquisition and converted into structured detection data through recognition processing; in other embodiments, the detection data can also be read directly through wired or wireless communication interfaces.

[0036] The detection data linkage processing module is used to establish the linkage relationship between the detection branch status, duct area identification, and detection results. Its processing logic includes: identifying the detection branch where the current inspection is located, obtaining the corresponding duct area identity information, automatically binding the detection results with the current duct area, comparing and analyzing the detection results of each area, and generating structured detection record data.

[0037] The visualization management module is used to graphically display the results of duct leakage detection. The display includes a duct area distribution map, detection status indicators (pass / fail / not detected), and highlighted abnormal areas, enabling visualized management and intuitive display of the duct inspection process, as shown in the instruction manual. Figure 6 As shown.

[0038] Automatic report generation module: Used to automatically generate inspection reports based on the inspection data after linkage processing. The report content includes the duct area number, inspection time, inspection results and inspection personnel information.

[0039] Instruction manual attached Figure 5The logic of the middle module is as follows: the detection structure acquisition module transmits the acquired information to the detection data linkage processing module for comparison and collects the signals from the duct area identification module. The data and identification are arranged in a one-to-one correspondence. The detection data linkage processing module inputs the processed data to the detection branch rotation control module to control each branch. At the same time, the arranged data is sent to the visualization management module for real-time observation on the display screen. Finally, the image generated by the visualization management module is transmitted to the automatic report generation module to generate the detection report.

[0040] The detection data linkage processing module, visualization management module, and automatic report generation module can all transmit data bidirectionally with the communication interface module, facilitating data transmission and storage, and ultimately sending it to external terminals such as computers and mobile phones.

[0041] The specific manual operation steps are as follows: Step 1: Initial Wiring and Hardware Setup Complete the connection between the duct leakage tester and the main air intake duct 2, delineate the area of ​​the duct 1 to be tested, connect the multiple quick-connect connectors 9 of the multi-round test connection component 3 to the multiple quick-connect fittings 10 on the duct 1 to be tested, and confirm that the pressure sensor 7, solenoid valve 8 and status indicator 4 are powered normally and the communication line is connected correctly. Debug the external terminal (computer / mobile phone), establish a communication connection between the external terminal and the system communication interface module, complete pairing and networking, and ensure that subsequent data can be transmitted bidirectionally.

[0042] Step 2: Configuration of Duct Area Identity Entry and Recognition The operator activates the duct area identification module in the system and enters the unique identification number, location information, pipeline parameters and other basic identification information for each section of the air intake duct 6 and pressure sensor 7 to be tested. The identity recognition module confirms that the identity signals of all duct areas are pushed to the detection data linkage processing module in a synchronized manner, and completes the pre-storage of the identities of the duct branches.

[0043] Step 3: Confirm that the pipe connection is normal and the pipe connection area is correct. Before starting the test, staff need to confirm the test areas corresponding to the air intake duct 6 and the duct to be tested 1. Each quick-connect fitting 10 is assigned a test area to determine if the air intake duct 6 corresponds to the appropriate testing area of ​​the duct to be tested 1. Specific connection requirements are as follows: The quick-connector 9 of the first air intake duct 6 is connected to the quick-connect fitting 10 to be tested in area A of the air intake duct 1 under test; the quick-connector 9 of the second air intake duct 6 is connected to the quick-connect fitting 10 to be tested in area B; the quick-connector 9 of the third air intake duct 6 is connected to the quick-connect fitting 10 to be tested in area C... and so on. The quick-connector of the Nth air intake duct 6 is connected to the quick-connect fitting 10 to be tested in area N of the air intake duct 1 under test, as shown in the attached instruction manual. Figure 6 As shown.

[0044] Step 4: Start the air leakage data acquisition operation Turn on the duct leakage tester and begin testing for leakage indicators in each duct branch; The system detection result acquisition module collects raw detection data such as pressure generated by pressure sensor 7, pressure output by pipeline leakage tester, air volume, and leakage volume in real time, and uploads them synchronously to the detection data linkage processing module. The detection data linkage processing module automatically completes data matching: it binds the collected air leakage detection data with the air duct identification identifiers issued by the air duct area identification module one by one, sorts and archives them, and controls the corresponding solenoid valve 8 to close.

[0045] Step 5: Branch rotation detection and control operation The detection data linkage processing module sends the matched dataset to the detection branch rotation control module; According to the testing plan, the operator can manually intervene / confirm the opening and closing of the solenoid valve 8 through the system. The testing branch rotation control module issues control commands to drive the solenoid valve 8 to switch between different duct branches, so as to realize the multi-branch rotation testing operation. During branch switching, the detection result acquisition module continuously and synchronously collects the detection data of the new branch and uploads it cyclically to the detection data linkage processing module to complete a new round of data matching.

[0046] Step Six: Real-time Visual Monitoring The detection data linkage processing module pushes the matched and organized duct detection data stream to the visualization management module; Operators can view real-time visual charts such as air leakage parameters of each duct branch, duct location, real-time change curves, and abnormal exceedance alerts through the system's display screen; If an abnormal air leakage value is detected, the corresponding duct number can be located in real time on the visual interface to quickly determine the location of the air leakage.

[0047] Step 7: Data Interaction and External Terminal Retrieval The visualization management module, the detection data linkage processing module, and the automatic report generation module can all transmit data bidirectionally with the communication interface module; Operators can operate the system as needed: they can transmit raw data and visualization charts from within the system to the outside world and store them in the cloud via the communication interface module; they can also issue setting commands and retrieve historical test data from external terminals (computers, mobile phones); Log in to the corresponding management program on an external terminal to remotely view real-time inspection progress and detailed inspection data for individual ducts.

[0048] Step 8: Automatic Generation and Export of Test Reports After all duct branch line inspections are completed, the visualization management module summarizes the full-cycle inspection images and statistical data and pushes them to the automatic report generation module. In the automatic report generation module interface, the operator selects a report template, fills in basic information such as project name, inspector, and inspection date, and triggers the automatic generation of a complete duct leakage inspection report with one click. The electronic report can be transmitted to an external terminal for storage and printing via the communication interface module, completing the entire testing process.

[0049] Step Nine: Finish and Archive the Work After verifying that all test data and report content are correct, archive the data for this batch of tests in the system; The detection branch actuator, pipeline leakage tester, and duct leakage detection auxiliary system host were shut down in sequence, the power supply to the equipment was cut off, the on-site wiring was tidied up, and the detection work was completed.

[0050] In summary, this invention, through the multi-branch structure design of the multi-round inspection access component, the rapid sealing connection structure, the position detection mechanism based on the pressure change of the sealing cavity, and the synergistic effect of the control system, achieves multi-point synchronous access for cleanroom duct leakage detection, precise location of leakage intervals, and information management of the detection process, significantly improving detection efficiency and positioning accuracy.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. For those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An auxiliary system for detecting air leakage in cleanroom ductwork, comprising a duct leakage tester, characterized in that, The outlet end of the pipeline leakage tester is connected to a main air inlet pipe, and the end of the main air inlet pipe is connected to a multi-round inspection access component, which includes N branch inspection mechanisms, where N≥2. The branch detection mechanism includes: An air intake duct, one end of which can be selectively connected to the main air intake duct, and the other end of which is used to connect to the air duct to be tested; A solenoid valve is installed between the main air intake pipe and the air intake duct to control the air passage opening and closing of the corresponding branch. Status indicator lights are provided corresponding to the solenoid valves to indicate the working status of the corresponding branch. The branch detection mechanism is provided with a quick-sealing connection structure at the docking position with the air duct to be tested, and the quick-sealing connection structure includes: Quick-connect fittings are fixedly installed on the wall of the duct to be tested; A quick-connect fitting is located at the free distal end of the air intake duct and is detachably and sealed to the quick-connect fitting.

2. The auxiliary system for detecting air leakage in cleanroom ducts according to claim 1, characterized in that, The quick-connect connector has a right-angle channel inside. One end of the right-angle channel is connected to the inside of the air intake duct, and the other end is connected to the inside of the duct to be tested when the quick-connect connector is connected to the quick-connect fitting. A sealing ring is provided at the position where the right-angle channel fits with the quick-connect fitting. The sealing ring is made of elastic memory material, and its outer diameter extending outside the port of the right-angle channel is smaller than its outer diameter inside the right-angle channel. A closed annular cavity is formed in the wall of the sealing ring, which serves as the sealing cavity. The sealing cavity is connected to a position detection mechanism.

3. The auxiliary system for detecting air leakage in cleanroom ducts according to claim 2, characterized in that, The quick-connector has a connecting channel on one side, the bottom end of the connecting channel is connected to the sealing cavity, and the position detection mechanism is disposed in the connecting channel; The position detection mechanism is used to generate a detectable signal in response to changes in gas pressure within the sealed cavity. The detectable signal is used to compare with the detectable signals output by the position detection mechanisms in the other branch detection mechanisms, so as to lock the air leakage location to the detection node area where the corresponding branch detection mechanism is located based on the comparison result.

4. The auxiliary system for detecting air leakage in cleanroom ducts according to claim 3, characterized in that, The position detection mechanism includes: The piston block is slidably and sealingly disposed within the communicating channel; A detection spring is disposed at one end of the piston block. The detection spring is configured to be compressed by the piston block when the gas pressure in the sealed cavity increases, so as to provide clearance space for the piston block and convert the gas pressure in the sealed cavity into mechanical force. A pressure sensor is disposed on the side of the detection spring away from the piston block, and is used to detect the pressure on the detection spring and output a corresponding electrical signal.

5. The auxiliary system for detecting air leakage in cleanroom ducts according to claim 4, characterized in that, The detection auxiliary system also includes a control system, which is disposed inside the multi-round detection access component. The control system is electrically connected to each of the solenoid valves, each of the pressure sensors, and each of the status indicator lights. The control system is configured to: (1) Receive the electrical signals output by each of the pressure sensors; (2) Determine the branch detection node area where the air leakage location is located based on the relative magnitude relationship between the electrical signals output by each pressure sensor; (3) Drive the corresponding status indicator to emit an air leakage warning signal according to the judgment result.

6. The auxiliary system for detecting air leakage in cleanroom ducts according to claim 5, characterized in that, The control system includes: The branch switching control module is used to control the switching of each branch testing unit according to a preset sequence or manual instructions, so that the pipeline leakage tester can test different branches in sequence. The duct area identification module is used to uniquely identify each detection node and establish the correspondence between the detection node and the duct area. The test result acquisition module is used to collect the test output results of each branch testing agency and convert the collected results into structured test data; The detection data linkage processing module is used to establish the linkage relationship between the detection branch status, duct area identification and detection results, automatically bind the detection results with the corresponding duct area, and compare and analyze the detection results of each area.

7. The auxiliary system for detecting air leakage in cleanroom ducts according to claim 5, characterized in that, The control system further includes: The visualization management module is used to graphically display the results of duct leakage detection. The displayed content includes a duct area distribution map, detection status indicators, and highlighted abnormal areas. The automatic report generation module is used to automatically generate test reports based on the test data after linkage processing.

8. A method for detecting air leakage in cleanroom ductwork using the system described in any one of claims 5-7, characterized in that, Includes the following steps: Step 1: Connect the N branch detection mechanisms of the multi-round inspection access component to different detection nodes of the same air duct under test through a quick-sealing connection structure, and seal both ends of the air duct under test; Step 2: The pipeline leakage tester synchronously delivers test gas to each branch testing unit through the main air intake pipe, so that the internal pressure of the air duct under test gradually increases and enters the pressure holding state. Step 3: Under pressure holding conditions, collect the pressure detection values ​​output by the pressure sensors in each branch detection mechanism, and compare the pressure detection values ​​with each other; Step 4: Based on the comparison results, identify the detection nodes corresponding to one or more branch detection mechanisms with the lowest pressure detection values ​​as the locations of air leaks, and issue an air leak warning signal through the corresponding status indicator lights.

9. The method for detecting air leakage in cleanroom ducts according to claim 8, characterized in that, The data collection and comparison process described in step three specifically includes: The values ​​detected by each pressure sensor at the initial moment of gas transmission are used as the reference value for zeroing. After the pressure in the duct under test enters the pressure holding state, the pressure change of each pressure sensor relative to the reference value is recorded. The pressure changes of each branch are sorted, and the branch detection node corresponding to the smallest pressure change is determined to be the location of the air leak.

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