A segmented pipeline gas-oil leakage point detection method

Abstract

The application discloses a segmented pipeline gas-oil tightness leak point detection method, and belongs to the technical field of aviation pipeline assembly, and is characterized by comprising the following steps: S1, dividing a pipeline system to be subjected to tightness test into a plurality of parallel or serial pipe systems; S2, collecting pressure data of the pipe systems; S3, conveying test medium from a tightness tester to the pipeline system; S4, monitoring inlet pressure and outlet pressure of each pipe system and calculating pressure deviation of each pipe system; S5, if the values of the inlet pressure and the pressure deviation of each pipe system are within a set condition range, the pipeline system is determined to be qualified in tightness; S6, determining a pipe system with a leak point and eliminating the leak point; and S7, monitoring pressure maintaining conditions of each same-pressure pipe system through a pressure maintaining pressure collecting device, and after a time, the test is completed. The application can realize rapid detection and positioning of gas-oil tightness leak points, and has the characteristics of high detection precision and fast detection speed.

Description

Technical Field

[0001] This invention relates to the field of aviation pipeline assembly technology, and in particular to a method for detecting gas and oil leaks in segmented pipelines. Background Technology

[0002] After the piping systems of an aircraft are assembled, they need to undergo airtightness or oiltightness tests to verify their sealing performance. The verification method involves filling the piping system with a test medium at a certain pressure and holding the pressure. If the pressure is insufficient, leaks need to be located. Traditionally, leaks are detected and eliminated visually or by applying soapy water. In addition to traditional methods, some new non-contact leak detection methods have emerged recently, such as helium mass spectrometry, ultrasonic testing, and airflow or optical signal acquisition. These methods all have some drawbacks. Traditional methods are inefficient, and newer methods lack accuracy in detecting complex aircraft piping systems, often making it difficult to pinpoint leaks. Furthermore, currently, none of the leak detection methods can monitor the test pressure of each pipe in the piping system in real time, and cannot issue alarms when pressure exceeds the limit.

[0003] Chinese patent document CN206420619U, published on August 18, 2017, discloses an airtightness testing system for aircraft pneumatic piping components. The system includes multiple sets of independent piping components pre-assembled on an aircraft, a pressure source, and an airtightness testing device. It also includes a flow divider converter with one airflow input port and multiple airflow output ports. The one airflow input port is simultaneously connected to the multiple airflow output ports. The one airflow input port is connected to the airtightness testing device via piping, and the multiple airflow output ports are respectively connected to multiple sets of piping components through piping to form multiple test air paths.

[0004] The aircraft pneumatic piping assembly airtightness testing system disclosed in this patent document can simultaneously test multiple independent piping assemblies on an aircraft, improving airtightness efficiency by diverting the air source. However, it cannot achieve rapid detection and location of air / oil leaks. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, this invention provides a segmented pipeline gas and oil leak detection method. This invention targets inlet and outlet pressure detection, and compared with traditional pipeline sealing detection, it can quickly detect and locate gas and oil leaks, and has the characteristics of high detection accuracy and fast detection speed.

[0006] This invention is achieved through the following technical solution: A method for detecting gas and oil leaks in segmented pipelines, characterized by comprising the following steps: S1. Divide the piping system to be tested for sealing into several parallel or series piping systems; S2. Install an inlet pressure acquisition device at the inlet of the test medium in each pipeline system and an outlet pressure acquisition device at the outlet to collect the pressure data of the pipeline system. S3. Transfer the test medium from the sealing tester to the piping system; S4. Monitor the inlet and outlet pressures of each piping system, issue overpressure alarms, and calculate the pressure deviation of each piping system. S5. If the inlet pressure and pressure deviation of each pipe system are within the set conditions, the pipeline system is judged to be qualified for sealing, and step S6 is skipped directly to step S7; if the inlet pressure and pressure deviation of each pipe system are not within the set conditions, the entire pipeline system has a leak. S6. Analyze the magnitude and sequence of pressure deviations in each piping system, identify and eliminate the piping systems with leaks, and repeat steps S3-S6 until there are no new leaks. S7. Monitor the pressure holding status of each pipeline system with the same pressure using the pressure holding acquisition device. The test is completed after the time limit is reached.

[0007] Step S1 specifically refers to splitting the piping system according to function, compartment, process separation surface or previous leak data patterns, with the same piping pressure within the same piping system.

[0008] In step S2, both the inlet pressure acquisition device and the outlet pressure acquisition device are connected to the main pipeline system via a tee connector. The tee connector at the inlet is located at the rear end of the pressure regulating device of the pipeline system. The tee connector is the real-time pressure acquisition point. After the pressure acquisition is completed at the acquisition point, the data is transmitted to the sealing tester for display, analysis and processing.

[0009] In step S3, the test medium supplied from the sealing tester is compressed air, nitrogen, fuel oil, or hydraulic oil. An input pressure acquisition device and a smart switch are installed at the test medium inlet of the sealing tester. The input pressure acquisition device is used to maintain the preset pressure of the test medium. An alarm is triggered when the input test medium pressure is higher than the preset pressure or when any pipeline is overpressurized.

[0010] In step S4, the pressure deviation of each piping system is calculated using Equation 1; ΔP=|P 进 -P 出 Equation 1 Where ΔP is the pressure deviation, P 进 Due to import pressure, P 出 This is due to export pressure.

[0011] Step S5 specifically includes: S51, if P 进If the value of ΔP meets the requirements, then the piping system is considered to be in good condition. S52, if P 进 If the numerical value meets the requirements, but the ΔP value does not meet the requirements, then the sealing performance of the piping system or the parallel piping system under the same pressure is unqualified and there is a leak. S53, if P 进 If the value does not meet the requirements, but the ΔP value does, then the sealing performance of the piping system is qualified, but there are leaks in other piping systems of the piping system. S54, if P 进 If both the ΔP and ΔP values ​​do not meet the requirements, then there are leaks in this piping system and other piping systems within the piping system.

[0012] Step S6 specifically includes: S61. In parallel piping systems with the same pressure, if the pressure deviation of the potentially leaking piping system increases first and changes the fastest, then the piping system is determined to be a leaking piping system. S62. In a series piping system with the same pressure, if there is a potential leak, the pressure deviation of the system will increase first and change the fastest, while P... 进 If the requirements are met, the piping system is determined to have a leak.

[0013] In step S7, the pressure holding and acquisition device is connected to the pipeline system of the inlet pressure acquisition device and the outlet pressure acquisition device of each pipeline system with the same pressure through a three-way connector, and a one-way valve is set at each junction.

[0014] The beneficial effects of this invention are mainly reflected in the following aspects: 1. In this invention, S1, the pipeline system to be tested for sealing is divided into several parallel or series pipe systems; S2, an inlet pressure acquisition device is installed at the inlet of the test medium in each pipe system, and an outlet pressure acquisition device is installed at the outlet to collect the pressure data of the pipe system; S3, the test medium is supplied from the sealing tester to the pipeline system; S4, the inlet and outlet pressures of each pipe system are monitored, an overpressure alarm is triggered, and the pressure deviation of each pipe system is calculated; S5, if the inlet pressure and pressure deviation of each pipe system are within the set range, the pipeline system is judged to be qualified for sealing, and step S6 is skipped directly to step S7. 7. If the inlet pressure and pressure deviation of each pipeline system are not within the set range, then there is a leak in the entire pipeline system. S6. Analyze the magnitude and sequence of pressure deviation of each pipeline system, identify the pipeline system with a leak and eliminate it. Repeat steps S3-S6 until there are no new leaks. S7. Monitor the pressure holding status of each pipeline system with the same pressure through the pressure holding acquisition device. After the time is reached, the test is completed. Compared with the existing technology, for inlet and outlet pressure detection, compared with traditional pipeline sealing detection, it can realize rapid detection and location of gas and oil leaks, and has the characteristics of high detection accuracy and fast detection speed.

[0015] 2. This invention can perform real-time monitoring of pipeline pressure and overpressure alarm. The test data can also be converted into digital signals, which facilitates the analysis of pipeline sealing test failures and has strong practical application value.

[0016] 3. This invention can quickly detect and locate gas and oil leaks in large and complex pipeline systems, and can also issue an alarm when the pipeline experiences overpressure to ensure safety.

[0017] 4. This invention achieves real-time digital monitoring of the pressure of each pipe system in the complex piping system of an aircraft through sealing tests, thereby improving the safety of the sealing test and the reliability of fault analysis.

[0018] 5. The present invention makes the entire detection process simple and easy to implement, and improves the accuracy and efficiency of detecting gas and oil leaks. Attached Figure Description

[0019] The present invention will now be further described in detail with reference to the accompanying drawings and specific embodiments: Figure 1 This is a schematic diagram of the detection process of the present invention; The markings in the diagram are: 1. Input pressure acquisition device; 2. Smart switch; 3. Inlet pressure acquisition device for pipe system B; 4. Inlet pressure acquisition device for pipe system A; 5. Outlet pressure acquisition device for pipe system A; 6. Outlet pressure acquisition device for pipe system B; 7. Pressure holding device for pipe systems A and B; 8. Inlet pressure acquisition device for pipe system C; 9. Outlet pressure acquisition device for pipe system C; 10. Pressure holding device for pipe system C; 11. Sealing tester; 12. Pressure regulating device; 13. One-way valve; A. Pipe system A; B. Pipe system B; C. Pipe system C. Detailed Implementation

[0020] Example 1 See Figure 1 A method for detecting gas and oil leaks in segmented pipelines, comprising the following steps: S1. Divide the piping system to be tested for sealing into several parallel or series piping systems; S2. Install an inlet pressure acquisition device at the inlet of the test medium in each pipeline system and an outlet pressure acquisition device at the outlet to collect the pressure data of the pipeline system. S3. Supply the test medium from the sealing tester 11 to the pipeline system; S4. Monitor the inlet and outlet pressures of each piping system, issue overpressure alarms, and calculate the pressure deviation of each piping system. S5. If the inlet pressure and pressure deviation of each pipe system are within the set conditions, the pipeline system is judged to be qualified for sealing, and step S6 is skipped directly to step S7; if the inlet pressure and pressure deviation of each pipe system are not within the set conditions, the entire pipeline system has a leak. S6. Analyze the magnitude and sequence of pressure deviations in each piping system, identify and eliminate the piping systems with leaks, and repeat steps S3-S6 until there are no new leaks. S7. Monitor the pressure holding status of each pipeline system with the same pressure using the pressure holding acquisition device. The test is completed after the time limit is reached.

[0021] This embodiment is the most basic implementation method. It is for inlet and outlet pressure detection. Compared with traditional pipeline sealing detection, it can quickly detect and locate gas and oil leaks, and has the characteristics of high detection accuracy and fast detection speed.

[0022] Example 2 See Figure 1 A method for detecting gas and oil leaks in segmented pipelines, comprising the following steps: S1. Divide the piping system to be tested for sealing into several parallel or series piping systems; S2. Install an inlet pressure acquisition device at the inlet of the test medium in each pipeline system and an outlet pressure acquisition device at the outlet to collect the pressure data of the pipeline system. S3. Supply the test medium from the sealing tester 11 to the pipeline system; S4. Monitor the inlet and outlet pressures of each piping system, issue overpressure alarms, and calculate the pressure deviation of each piping system. S5. If the inlet pressure and pressure deviation of each pipe system are within the set conditions, the pipeline system is judged to be qualified for sealing, and step S6 is skipped directly to step S7; if the inlet pressure and pressure deviation of each pipe system are not within the set conditions, the entire pipeline system has a leak. S6. Analyze the magnitude and sequence of pressure deviations in each piping system, identify and eliminate the piping systems with leaks, and repeat steps S3-S6 until there are no new leaks. S7. Monitor the pressure holding status of each pipeline system with the same pressure using the pressure holding acquisition device. The test is completed after the time limit is reached.

[0023] Furthermore, step S1 specifically refers to splitting the piping system according to function, with the same pipeline pressure within the same piping system.

[0024] In step S2, both the inlet pressure acquisition device and the outlet pressure acquisition device are connected to the main pipeline system through a tee connector. The tee connector at the inlet is located at the rear end of the pressure regulating device 12 of the pipeline system. The tee connector is the real-time pressure acquisition point. After the pressure acquisition is completed at the acquisition point, the data is transmitted to the sealing tester 11 for display, analysis and processing.

[0025] This embodiment is a preferred implementation method, which can perform real-time monitoring of pipeline pressure and overpressure alarm. The test data can also be converted into digital signals, which provides convenience for pipeline sealing test fault analysis and has strong practical application value.

[0026] Example 3 See Figure 1 A method for detecting gas and oil leaks in segmented pipelines, comprising the following steps: S1. Divide the piping system to be tested for sealing into several parallel or series piping systems; S2. Install an inlet pressure acquisition device at the inlet of the test medium in each pipeline system and an outlet pressure acquisition device at the outlet to collect the pressure data of the pipeline system. S3. Supply the test medium from the sealing tester 11 to the pipeline system; S4. Monitor the inlet and outlet pressures of each piping system, issue overpressure alarms, and calculate the pressure deviation of each piping system. S5. If the inlet pressure and pressure deviation of each pipe system are within the set conditions, the pipeline system is judged to be qualified for sealing, and step S6 is skipped directly to step S7; if the inlet pressure and pressure deviation of each pipe system are not within the set conditions, the entire pipeline system has a leak. S6. Analyze the magnitude and sequence of pressure deviations in each piping system, identify and eliminate the piping systems with leaks, and repeat steps S3-S6 until there are no new leaks. S7. Monitor the pressure holding status of each pipeline system with the same pressure using the pressure holding acquisition device. The test is completed after the time limit is reached.

[0027] Step S1 specifically refers to splitting the piping system according to the cabin, with the same pipeline pressure within the same piping system.

[0028] In step S2, both the inlet pressure acquisition device and the outlet pressure acquisition device are connected to the main pipeline system through a tee connector. The tee connector at the inlet is located at the rear end of the pressure regulating device 12 of the pipeline system. The tee connector is the real-time pressure acquisition point. After the pressure acquisition is completed at the acquisition point, the data is transmitted to the sealing tester 11 for display, analysis and processing.

[0029] Furthermore, in step S3, the test medium supplied from the sealing tester 11 is compressed air, nitrogen, fuel oil, or hydraulic oil. An input pressure acquisition device 1 and a smart switch 2 are installed at the test medium inlet of the sealing tester 11. The input pressure acquisition device 1 is used to maintain the preset pressure of the test medium. An alarm is triggered when the input test medium pressure is higher than the preset pressure or when any pipeline is overpressurized.

[0030] Furthermore, in step S4, the pressure deviation of each piping system is calculated using Equation 1; ΔP = |P_in - P_out| Equation 1 Where ΔP is the pressure deviation, Pin is the inlet pressure, and Pout is the outlet pressure.

[0031] This embodiment is another preferred implementation method, which can realize the rapid detection and location of gas and oil leaks in large and complex pipeline systems. At the same time, it can issue an alarm when the pipeline is overpressured to ensure safety.

[0032] Example 4 See Figure 1 A method for detecting gas and oil leaks in segmented pipelines, comprising the following steps: S1. Divide the piping system to be tested for sealing into several parallel or series piping systems; S2. Install an inlet pressure acquisition device at the inlet of the test medium in each pipeline system and an outlet pressure acquisition device at the outlet to collect the pressure data of the pipeline system. S3. Supply the test medium from the sealing tester 11 to the pipeline system; S4. Monitor the inlet and outlet pressures of each piping system, issue overpressure alarms, and calculate the pressure deviation of each piping system. S5. If the inlet pressure and pressure deviation of each pipe system are within the set conditions, the pipeline system is judged to be qualified for sealing, and step S6 is skipped directly to step S7; if the inlet pressure and pressure deviation of each pipe system are not within the set conditions, the entire pipeline system has a leak. S6. Analyze the magnitude and sequence of pressure deviations in each piping system, identify and eliminate the piping systems with leaks, and repeat steps S3-S6 until there are no new leaks. S7. Monitor the pressure holding status of each pipeline system with the same pressure using the pressure holding acquisition device. The test is completed after the time limit is reached.

[0033] Step S1 specifically refers to splitting the piping system according to the process separation surface, with the pipeline pressure of the same piping system being the same.

[0034] In step S2, both the inlet pressure acquisition device and the outlet pressure acquisition device are connected to the main pipeline system through a tee connector. The tee connector at the inlet is located at the rear end of the pressure regulating device 12 of the pipeline system. The tee connector is the real-time pressure acquisition point. After the pressure acquisition is completed at the acquisition point, the data is transmitted to the sealing tester 11 for display, analysis and processing.

[0035] In step S3, the test medium supplied from the sealing tester 11 is compressed air, nitrogen, fuel oil or hydraulic oil. An input pressure acquisition device 1 and a smart switch 2 are installed at the test medium inlet of the sealing tester 11. The input pressure acquisition device 1 is used to maintain the preset pressure of the test medium. An alarm is triggered when the input test medium pressure is higher than the preset pressure or when any pipeline is over-pressurized.

[0036] In step S4, the pressure deviation of each piping system is calculated using Equation 1; ΔP = |P_in - P_out| Equation 1 Where ΔP is the pressure deviation, Pin is the inlet pressure, and Pout is the outlet pressure.

[0037] Furthermore, step S5 specifically includes: S51. If the values ​​of P_in and ΔP meet the requirements, then the piping system is qualified for sealing. S52. If the value of P in meets the requirements, but the value of ΔP does not meet the requirements, then the sealing performance of the piping system or the parallel piping system with the same pressure is unqualified and there is a leak. S53. If the value of P does not meet the requirements, but the value of ΔP meets the requirements, then the sealing performance of the piping system is qualified, but there are leaks in other piping systems of the piping system. S54. If the values ​​of P_in and ΔP do not meet the requirements, then there are leaks in the piping system and other piping systems in the piping system.

[0038] This embodiment is another preferred implementation method. By conducting a sealing test on the complex piping system of an aircraft, it achieves real-time digital monitoring of the pressure of each pipe system in the piping system, thereby improving the safety of the piping system sealing test and the reliability of fault analysis.

[0039] Example 5 See Figure 1 A method for detecting gas and oil leaks in segmented pipelines, comprising the following steps: S1. Divide the piping system to be tested for sealing into several parallel or series piping systems; S2. Install an inlet pressure acquisition device at the inlet of the test medium in each pipeline system and an outlet pressure acquisition device at the outlet to collect the pressure data of the pipeline system. S3. Supply the test medium from the sealing tester 11 to the pipeline system; S4. Monitor the inlet and outlet pressures of each piping system, issue overpressure alarms, and calculate the pressure deviation of each piping system. S5. If the inlet pressure and pressure deviation of each pipe system are within the set conditions, the pipeline system is judged to be qualified for sealing, and step S6 is skipped directly to step S7; if the inlet pressure and pressure deviation of each pipe system are not within the set conditions, the entire pipeline system has a leak. S6. Analyze the magnitude and sequence of pressure deviations in each piping system, identify and eliminate the piping systems with leaks, and repeat steps S3-S6 until there are no new leaks. S7. Monitor the pressure holding status of each pipeline system with the same pressure using the pressure holding acquisition device. The test is completed after the time limit is reached.

[0040] Step S1 specifically refers to dividing the piping system according to the pattern of previous leak data, with the same pipe pressure in the same piping system.

[0041] In step S2, both the inlet pressure acquisition device and the outlet pressure acquisition device are connected to the main pipeline system through a tee connector. The tee connector at the inlet is located at the rear end of the pressure regulating device 12 of the pipeline system. The tee connector is the real-time pressure acquisition point. After the pressure acquisition is completed at the acquisition point, the data is transmitted to the sealing tester 11 for display, analysis and processing.

[0042] In step S3, the test medium supplied from the sealing tester 11 is compressed air, nitrogen, fuel oil or hydraulic oil. An input pressure acquisition device 1 and a smart switch 2 are installed at the test medium inlet of the sealing tester 11. The input pressure acquisition device 1 is used to maintain the preset pressure of the test medium. An alarm is triggered when the input test medium pressure is higher than the preset pressure or when any pipeline is over-pressurized.

[0043] In step S4, the pressure deviation of each piping system is calculated using Equation 1; ΔP = |P_in - P_out| Equation 1 Where ΔP is the pressure deviation, Pin is the inlet pressure, and Pout is the outlet pressure.

[0044] Step S5 specifically includes: S51. If the values ​​of P_in and ΔP meet the requirements, then the piping system is qualified for sealing. S52. If the value of P in meets the requirements, but the value of ΔP does not meet the requirements, then the sealing performance of the piping system or the parallel piping system with the same pressure is unqualified and there is a leak. S53. If the value of P does not meet the requirements, but the value of ΔP meets the requirements, then the sealing performance of the piping system is qualified, but there are leaks in other piping systems of the piping system. S54. If the values ​​of P_in and ΔP do not meet the requirements, then there are leaks in the piping system and other piping systems in the piping system.

[0045] Step S6 specifically includes: S61. In parallel piping systems with the same pressure, if the pressure deviation of the potentially leaking piping system increases first and changes the fastest, then the piping system is determined to be a leaking piping system. S62. In a series of pipe systems with the same pressure, if the pressure deviation of the pipe system with potential leakage increases first and changes the fastest, and P meets the requirements, then the pipe system is determined to be a pipe system with leakage.

[0046] In step S7, the pressure holding and acquisition device is connected to the pipeline system of the inlet pressure acquisition device and outlet pressure acquisition device of each pressure pipeline system through a three-way connector, and a one-way valve 13 is set at each junction.

[0047] This embodiment is the best implementation method. The entire detection process is simple and easy to perform, and it improves the accuracy and efficiency of detecting gas and oil leaks.

[0048] The principle of this invention is as follows: The design employs segmented pressure acquisition and pressure maintenance for pipelines with the same pressure. First, the pipeline is divided into several parallel or series pipelines. Second, pressure acquisition devices are installed at the inlet and outlet of the test medium in each pipeline to collect pressure data. Stable pressure test medium is supplied from the sealing tester 11. The intelligent switch 2 and the pressure acquisition devices ensure the supply and pressure of the input test medium and perform overpressure emergency handling. The pressure deviation at the inlet and outlet of each pipeline is monitored and calculated. Finally, it is determined whether the inlet pressure and pressure deviation of each pipeline are within the set conditions. The magnitude and sequence of pressure deviations of each pipeline are analyzed to identify and eliminate pipelines with leaks.

Claims

1. A method for detecting gas and oil leaks in segmented pipelines, characterized in that, Includes the following steps: S1. Divide the piping system to be tested for sealing into several parallel or series piping systems; S2. Install an inlet pressure acquisition device at the inlet of the test medium in each pipeline system and an outlet pressure acquisition device at the outlet to collect the pressure data of the pipeline system. S3. The test medium is supplied from the sealing tester (11) to the pipeline system; S4. Monitor the inlet and outlet pressures of each piping system, issue overpressure alarms, and calculate the pressure deviation of each piping system. S5. If the inlet pressure and pressure deviation of each pipe system are within the set conditions, the pipeline system is judged to be qualified for sealing, and step S6 is skipped directly to step S7; if the inlet pressure and pressure deviation of each pipe system are not within the set conditions, the entire pipeline system has a leak. S6. Analyze the magnitude and sequence of pressure deviations in each piping system, identify and eliminate the piping systems with leaks, and repeat steps S3-S6 until there are no new leaks. S7. Monitor the pressure holding status of each pipeline system with the same pressure through the pressure holding acquisition device. The test is completed after the time is reached. In step S4, the pressure deviation of each piping system is calculated using Equation 1; ΔP = |P_in - P_out| Equation 1 Where ΔP is the pressure deviation, Pin is the inlet pressure, and Pout is the outlet pressure; Step S5 specifically includes: S51. If the values ​​of P_in and ΔP meet the requirements, then the piping system is qualified for sealing. S52. If the value of P in meets the requirements, but the value of ΔP does not meet the requirements, then the sealing performance of the piping system or the parallel piping system with the same pressure is unqualified and there is a leak. S53. If the value of P does not meet the requirements, but the value of ΔP meets the requirements, then the sealing performance of the piping system is qualified, but there are leaks in other piping systems of the piping system. S54. If the values ​​of P_in and ΔP do not meet the requirements, then there are leaks in the piping system and other piping systems in the piping system.

2. The method for detecting gas and oil leaks in a segmented pipeline according to claim 1, characterized in that: In step S2, both the inlet pressure acquisition device and the outlet pressure acquisition device are connected to the main pipeline system through a tee connector. The tee connector at the inlet is located at the rear end of the pressure regulating device (12) of the pipeline system. The tee connector is the real-time pressure acquisition point. After the pressure acquisition is completed at the acquisition point, the data is transmitted to the sealing tester (11) for display, analysis and processing.

3. The method for detecting gas and oil leaks in a segmented pipeline according to claim 1, characterized in that: In step S3, the test medium supplied from the sealing tester (11) is compressed air, nitrogen, fuel oil or hydraulic oil. An input pressure acquisition device (1) and a smart switch (2) are set at the test medium inlet of the sealing tester (11). The input pressure acquisition device (1) is used to maintain the preset pressure of the test medium. When the input test medium pressure is higher than the preset pressure or the pipeline system is over-pressured, an alarm is triggered.

4. The method for detecting gas and oil leaks in a segmented pipeline according to claim 1, characterized in that: In step S7, the pressure holding and acquisition device is connected to the pipeline system of the inlet pressure acquisition device and outlet pressure acquisition device of each pressure pipeline system through a three-way connector, and a one-way valve (13) is set at each junction.

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