A gantry pneumatic pressure measurement system line seal inspection apparatus and method

Abstract

The application belongs to the field of aero-engine test, and particularly relates to a rig aerodynamic pressure measurement system pipeline sealing inspection equipment and method. The equipment comprises a digital pressure instrument, a measurement channel input port of the digital pressure instrument is connected with a measured equipment through an aerodynamic pressure measurement pipeline, and the aerodynamic pressure measurement pipeline is sealed at a pipeline plug end connected with the measured equipment during pipeline sealing inspection; a working mode conversion control pipeline comprises a main control pipeline and five control branches; a first end of an inspection gas source pipeline is connected with an inspection gas source, and a second end is connected with a PRG port of the digital pressure instrument; a second pressure sensor and a sixth aerodynamic valve are arranged on the inspection gas source pipeline; and an upper computer is used for controlling the digital pressure instrument to perform mode conversion and controlling each aerodynamic valve. The application can simultaneously and on-line seal and inspect 16 aerodynamic pressure measurement pipelines, and has the function of accurately positioning a gas leakage pipeline.

Description

Technical Field

[0001] This application belongs to the field of aero-engine testing, and specifically relates to a device and method for inspecting the sealing of pipelines in a bench pneumatic pressure measurement system. Background Technology

[0002] In aero-engine testing, aerodynamic pressure parameters typically account for more than 50% of the total test parameters, and the validity of parameter measurements directly affects the success or failure of the test. Engine testing environments are harsh, and the aerodynamic pressure measurement system is installed in a control room far from the test site. The system's measurement pipelines are long and contain adapters. These pipelines operate under constant vibration and noise, making the connections prone to loosening and leaks, leading to distorted and invalid test data. Test bench aerodynamic pressure measurement systems generally use digital pressure gauges. Each measurement module includes 16 measurement channel input ports, as well as function control input ports for zero-point calibration, system calibration, and pipeline purging. During critical tests, a pressurized and sealed check of the aerodynamic pressure measurement pipelines is usually performed to confirm their proper functioning.

[0003] Currently, there are two main methods for checking the sealing of pneumatic pressure measurement pipelines. The first method involves two workers at the test site using a portable pressure signal generator to connect to each pressure measurement channel, apply check pressure, and observe the pressure display on the signal meter to confirm that there are no leaks in the pneumatic pressure input pipelines. This method is not only time-consuming and labor-intensive but also carries the risk of missing leaks. The second method involves creating a sealing check sensing unit, connecting the measurement channels of several digital pressure gauges under test to the sensing unit, inputting check pressure into the pressure input port of the sensing unit, and observing the pressure display on the signal meter to confirm that all checked pneumatic pressure input pipelines are leak-free. At test sites, there are hundreds of pneumatic pressure parameters, with measurement pipelines distributed around the test bench. The ambient temperature in the test chamber varies significantly with the seasons. This method of pressurizing the pneumatic pressure measurement channels prolongs preparation time, increases personnel costs, and reduces test efficiency.

[0004] Therefore, it is desirable to have a technical solution to overcome or at least mitigate one of the aforementioned defects of the prior art. Summary of the Invention

[0005] The purpose of this application is to provide a device and method for inspecting the pipeline seals of a bench pneumatic pressure measurement system, in order to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is:

[0007] The first aspect of this application provides a bench-mounted pneumatic pressure measurement system pipeline sealing inspection device, comprising:

[0008] A digital pressure gauge, wherein the input port of the measurement channel of the digital pressure gauge is connected to the device under test through a pneumatic pressure measurement pipeline, and the connection end between the pneumatic pressure measurement pipeline and the device under test is sealed by a pipeline plug during pipeline sealing inspection;

[0009] The operating mode switching control pipeline includes a main control pipeline and a first control branch, a second control branch, a third control branch, a fourth control branch, and a fifth control branch, wherein...

[0010] The first end of the main control pipeline is connected to the control air source, and a first pressure sensor is installed on the main control pipeline;

[0011] The first end of each of the five control branches is connected to the second end of the main control pipeline;

[0012] The second end of the first control branch is connected to the CT1 port of the digital pressure instrument, and a first pneumatic valve is provided on the first control branch;

[0013] The second end of the second control branch is connected to the CT2 port of the digital pressure instrument, and a second pneumatic valve is provided on the second control branch;

[0014] The second end of the third control branch is connected to the CTL port of the digital pressure instrument, and a third pneumatic valve is provided on the third control branch;

[0015] The second end of the fourth control branch is connected to the RTN port of the digital pressure instrument, and a fourth pneumatic valve is provided on the fourth control branch.

[0016] The second end of the fifth control branch is connected to the PRGCTL port of the digital pressure instrument, and a fifth pneumatic valve is provided on the fifth control branch;

[0017] The inspection air supply line is connected to an inspection air source at its first end and to the PRG port of the digital pressure gauge at its second end. The inspection air supply line is equipped with a second pressure sensor and a sixth pneumatic valve.

[0018] The host computer is used to control the digital pressure instrument to switch modes and control each pneumatic valve.

[0019] In at least one embodiment of this application, the control gas source is equipped with a first pressure reducing valve.

[0020] In at least one embodiment of this application, the control gas source is used to provide control gas of 90 to 120 psi.

[0021] In at least one embodiment of this application, the inspection gas source is equipped with a second pressure reducing valve.

[0022] The second aspect of this application provides a method for inspecting the sealing of a pipeline in a bench pneumatic pressure measurement system, based on the bench pneumatic pressure measurement system pipeline sealing inspection equipment described above, comprising:

[0023] Step 1: Seal the connection between the pneumatic pressure measurement pipeline and the equipment under test in the test chamber using a pipe plug;

[0024] Step 2: Open the first pressure reducing valve, connect the control air source to the working mode conversion control line, and monitor the pressure sensor reading on the main control line to confirm that the pressure reading is within the range of 90 to 120 psi.

[0025] Step 3: Through the host computer control, open the first pneumatic valve, the second pneumatic valve and the fifth pneumatic valve, input the control pressure to the CT1 control terminal, CT2 control terminal and PRGCTL control terminal of the digital pressure instrument, switch the working mode of the digital pressure instrument to the reverse purging mode of the measuring pipeline, and monitor the pipeline air pressure through the reading of the first pressure sensor during the switching process. If the pressure is not in the range of 90-120psi, an alarm will be triggered.

[0026] Step 4: Open the second pressure reducing valve and adjust the test gas supply to bring the test gas in the test gas supply line to the required pressure.

[0027] Step 5: Open the sixth pneumatic valve on the inspection air supply line via the host computer to input inspection air into the pneumatic pressure measurement line, filling all pneumatic pressure measurement lines. After the air supply continues for a preset time and the pressure stabilizes, close the sixth pneumatic valve and check the sealing of all pneumatic pressure measurement lines connected to the digital pressure gauge by the reading of the second pressure sensor. If the reading of the second pressure sensor is stable, it indicates that the sealing of the measurement line is normal, and proceed to step 6. If the reading of the second pressure sensor gradually decreases, it indicates that at least one line has an air leak, and proceed to step 7.

[0028] Step 6: Close the first, second, and fifth pneumatic valves via the host computer to disconnect the control air source; release the sixth pneumatic valve via the host computer to purge the gas from the inspection air source pipeline; purge the control branches of the CT1, CT2, and PRGCTL control terminals of the digital pressure instrument via the first, second, and fifth pneumatic valves via the host computer.

[0029] Step 7: Control the first, second, and fifth pneumatic valves via the host computer to purge the gas from the control branches of the CT1, CT2, and PRGCTL control terminals of the digital pressure instrument. Switch the digital pressure instrument to measurement mode and determine the leakage path by observing the measurement values ​​of each channel of the digital pressure instrument.

[0030] In at least one embodiment of this application, in step four, while opening the second pressure reducing valve and adjusting the test gas source to bring the test gas in the test gas source pipeline to the required pressure, it is confirmed that the pressure of the test gas in the test gas source pipeline does not exceed the range of the digital pressure gauge under test.

[0031] In at least one embodiment of this application, in steps six and seven, while controlling the first pneumatic valve, the second pneumatic valve and the fifth pneumatic valve through the host computer to purge the gas in the control branches of the CT1 control terminal, CT2 control terminal and PRGCTL control terminal of the digital pressure instrument, it is confirmed that the pressure of the test gas in the test gas source pipeline does not exceed the range of the digital pressure instrument under test.

[0032] The invention has at least the following beneficial technical effects:

[0033] The bench pneumatic pressure measurement system pipeline sealing inspection equipment of this application utilizes the reverse purging function of the pneumatic pressure measurement equipment to input sealing inspection gas into the bench pneumatic pressure measurement pipeline with the measurement input port closed in the test chamber using a purging gas source. This enables simultaneous online sealing inspection of 16 pneumatic pressure test pipelines and has the function of accurately locating leaking pipelines. It solves the problems of existing pneumatic pressure measurement pipeline sealing pressurization inspection being greatly affected by the environment, time-consuming, requiring a large number of personnel, labor intensity, and low inspection efficiency. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of a bench pneumatic pressure measurement system pipeline sealing inspection device according to one embodiment of this application. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0036] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.

[0037] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0038] The first aspect of this application provides a bench pneumatic pressure measurement system pipeline sealing inspection device, including: a digital pressure gauge, a working mode conversion control pipeline, an inspection air source pipeline, and a host computer.

[0039] Specifically, such as Figure 1 As shown, the digital pressure gauge has 16 measurement channel input ports. Each measurement channel input port is connected to the device under test through a corresponding pneumatic pressure measurement pipeline. During pipeline sealing inspection, the connection end between the pneumatic pressure measurement pipeline and the device under test is sealed with a pipeline plug. The operating mode switching control pipeline includes a main control pipeline and five control branches: a first control branch, a second control branch, a third control branch, a fourth control branch, and a fifth control branch. The first end of the main control pipeline is connected to a control air source, and a first pressure sensor is installed on the main control pipeline. The control air source is equipped with a first pressure reducing valve. The first ends of each of the five control branches are connected to the second end of the main control pipeline. The second end of the first control branch is connected to the CT1 port of the digital pressure instrument, and a first pneumatic valve is installed on the first control branch. The second end of the second control branch is connected to the CT2 port of the digital pressure instrument, and a second pneumatic valve is installed on the second control branch. The second end of the third control branch is connected to the CTL port of the digital pressure instrument, and a third pneumatic valve is installed on the third control branch. The second end of the fourth control branch is connected to the RTN port of the digital pressure instrument, and a fourth pneumatic valve is installed on the fourth control branch. The second end of the fifth control branch is connected to the PRGCTL port of the digital pressure instrument, and a fifth pneumatic valve is installed on the fifth control branch. The first end of the inspection air supply line is connected to the inspection air source, and the second end is connected to the PRG port of the digital pressure instrument. The inspection air supply line is equipped with a second pressure sensor and a sixth pneumatic valve, and the inspection air source is equipped with a second pressure reducing valve. The host computer is used to control the digital pressure instrument to perform mode switching and to control each pneumatic valve.

[0040] The bench pneumatic pressure measurement system pipeline sealing inspection device of this application adds a device operating mode conversion control pipeline around the digital pressure gauge of the bench pneumatic pressure measurement system, and connects an inspection air source pipeline to the PRG port of the digital pressure gauge. Pneumatic valves and pressure sensors are connected to both the operating mode conversion control pipeline and the inspection air source pipeline. During pipeline sealing inspection, the device end of the pneumatic pressure measurement pipeline is sealed with a quick-connect pipeline plug. The host computer controls the digital pressure gauge to switch to purge mode, inputs purge air into the PRG port, and after the air pressure stabilizes, closes the input pneumatic valve. The pipeline sealing status is determined by observing the pressure reading of the pressure sensor.

[0041] The benchtop pneumatic pressure measurement system pipeline sealing inspection device of this application includes a working mode switching control pipeline, which is an assembly that determines the operating mode of the digital pressure instrument. The control air source can provide 90-120 psi of control air for switching the working modes of the digital pressure instrument. The first pressure sensor 1 is a control pipeline pressure measuring sensor, which can monitor the control air source pressure on the host computer. Pneumatic valves 1-5 are used to control the switching of the digital pressure instrument between working modes such as measurement, purging, zeroing, and calibration. The inspection air source pipeline provides inspection air to the PRG port of the digital pressure instrument as a sealing inspection air source. The second pressure sensor 2 is a pipeline pressure measuring sensor, which can monitor the inspection air source pressure on the host computer. The sixth pneumatic valve 6 is used to close the pneumatic valve after the inspection air pressure stabilizes to check the sealing status of the air circuit. The pipeline plug can seal the measurement pipeline.

[0042] Based on the aforementioned test bench pneumatic pressure measurement system pipeline sealing inspection equipment, a second aspect of this application provides a method for inspecting the pipeline sealing of a test bench pneumatic pressure measurement system, comprising the following steps:

[0043] Step 1: Seal the connection between the pneumatic pressure measurement pipeline and the equipment under test in the test chamber using a pipe plug;

[0044] Step 2: Open the first pressure reducing valve, connect the control air source to the working mode conversion control line, and monitor the pressure sensor reading on the main control line to confirm that the pressure reading is within the range of 90 to 120 psi.

[0045] Step 3: Through the host computer control, open the first pneumatic valve, the second pneumatic valve and the fifth pneumatic valve, input the control pressure to the CT1 control terminal, CT2 control terminal and PRGCTL control terminal of the digital pressure instrument, switch the working mode of the digital pressure instrument to the reverse purging mode of the measuring pipeline, and monitor the pipeline air pressure through the reading of the first pressure sensor during the switching process. If the pressure is not in the range of 90-120psi, an alarm will be triggered.

[0046] Step 4: Open the second pressure reducing valve and adjust the test gas supply to bring the test gas in the test gas supply line to the required pressure.

[0047] Step 5: Open the sixth pneumatic valve on the inspection air supply line via the host computer to input inspection air into the pneumatic pressure measurement line, filling all pneumatic pressure measurement lines. After the air supply continues for a preset time and the pressure stabilizes, close the sixth pneumatic valve and check the sealing of all pneumatic pressure measurement lines connected to the digital pressure gauge by the reading of the second pressure sensor. If the reading of the second pressure sensor is stable, it indicates that the sealing of the measurement line is normal, and proceed to step 6. If the reading of the second pressure sensor gradually decreases, it indicates that at least one line has an air leak, and proceed to step 7.

[0048] Step Six: Close the first, second, and fifth pneumatic valves via the host computer to disconnect the control air source; control the sixth pneumatic valve via the host computer to release air and purge the gas from the inspection air source pipeline (maintain control pressure at this time to prevent inspection air from entering the measuring sensor, which is especially important for small-range digital pressure instruments); control the first, second, and fifth pneumatic valves via the host computer to purge the gas from the control branches of the CT1, CT2, and PRGCTL control terminals of the digital pressure instrument.

[0049] Step 7: Using the host computer, control the first, second, and fifth pneumatic valves to purge the gas from the control branches of the CT1, CT2, and PRGCTL control terminals of the digital pressure instrument. Switch the digital pressure instrument to measurement mode and observe the measurement values ​​of each channel to determine the leakage path. After troubleshooting, the sealing inspection steps can be restarted.

[0050] In a preferred embodiment of this application, to ensure equipment safety, in step four, while opening the second pressure reducing valve and adjusting the test gas source to bring the test gas in the test gas source pipeline to the required pressure, it is confirmed that the pressure of the test gas in the test gas source pipeline does not exceed the range of the digital pressure instrument under test. In steps six and seven, while controlling the first pneumatic valve, the second pneumatic valve, and the fifth pneumatic valve through the host computer to purge the gas from the control branches of the CT1 control terminal, CT2 control terminal, and PRGCTL control terminal of the digital pressure instrument, it is confirmed that the pressure of the test gas in the test gas source pipeline does not exceed the range of the digital pressure instrument under test.

[0051] This application discloses a benchtop pneumatic pressure measurement system pipeline sealing inspection device and method. It adds control elements, monitoring equipment, and auxiliary pipelines to the external digital pressure gauge. Controlled by a host computer, it completes the sealing inspection of 16 channels of pneumatic pressure measurement pipelines of the digital pressure gauge. The host computer can monitor the working status and opening / closing status of all pneumatic valves in real time, allowing for immediate detection of pneumatic valve failures. This application can perform the main tasks of pneumatic pressure measurement pipeline sealing inspection, completing functions such as automatic air supply and simultaneous multi-channel inspection indoors. It can accurately locate leaking measurement pipelines, making the pipeline sealing inspection unaffected by environmental conditions, shortening inspection time, reducing operator costs, and improving testing efficiency.

[0052] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A test bench pneumatic pressure measurement system pipeline sealing inspection device, characterized in that, include: A digital pressure gauge, wherein the input port of the measurement channel of the digital pressure gauge is connected to the device under test through a pneumatic pressure measurement pipeline, and the connection end between the pneumatic pressure measurement pipeline and the device under test is sealed by a pipeline plug during pipeline sealing inspection; The operating mode switching control pipeline includes a main control pipeline and a first control branch, a second control branch, a third control branch, a fourth control branch, and a fifth control branch, wherein... The first end of the main control pipeline is connected to the control air source, and a first pressure sensor is installed on the main control pipeline; The first end of each of the five control branches is connected to the second end of the main control pipeline; The second end of the first control branch is connected to the CT1 port of the digital pressure instrument, and a first pneumatic valve is provided on the first control branch; The second end of the second control branch is connected to the CT2 port of the digital pressure instrument, and a second pneumatic valve is provided on the second control branch; The second end of the third control branch is connected to the CTL port of the digital pressure instrument, and a third pneumatic valve is provided on the third control branch; The second end of the fourth control branch is connected to the RTN port of the digital pressure instrument, and a fourth pneumatic valve is provided on the fourth control branch. The second end of the fifth control branch is connected to the PRGCTL port of the digital pressure instrument, and a fifth pneumatic valve is provided on the fifth control branch; The inspection air supply line is connected to an inspection air source at its first end and to the PRG port of the digital pressure gauge at its second end. The inspection air supply line is equipped with a second pressure sensor and a sixth pneumatic valve. The host computer is used to control the digital pressure instrument to switch modes and control each pneumatic valve; Methods for checking the sealing of pipelines in a bench pneumatic pressure measurement system include: Step 1: Seal the connection between the pneumatic pressure measurement pipeline and the equipment under test in the test chamber using a pipe plug; Step 2: Open the first pressure reducing valve, connect the control air source to the working mode conversion control line, and monitor the pressure sensor reading on the main control line to confirm that the pressure sensor reading is within the range of 90 to 120 psi. Step 3: Through the host computer control, open the first pneumatic valve, the second pneumatic valve and the fifth pneumatic valve, input the control pressure to the CT1 control terminal, CT2 control terminal and PRGCTL control terminal of the digital pressure instrument, switch the working mode of the digital pressure instrument to the reverse purging mode of the measuring pipeline, and monitor the pipeline air pressure through the reading of the first pressure sensor during the switching process. If the pressure is not in the range of 90-120psi, an alarm will be triggered. Step 4: Open the second pressure reducing valve and adjust the test gas supply to bring the test gas in the test gas supply line to the required pressure. Step 5: Open the sixth pneumatic valve on the inspection air supply line via the host computer to input inspection air into the pneumatic pressure measurement line, filling all pneumatic pressure measurement lines. After the air supply continues for a preset time and the pressure stabilizes, close the sixth pneumatic valve and check the sealing of all pneumatic pressure measurement lines connected to the digital pressure gauge by the reading of the second pressure sensor. If the reading of the second pressure sensor is stable, it indicates that the sealing of the measurement line is normal, and proceed to step 6. If the reading of the second pressure sensor gradually decreases, it indicates that at least one line has an air leak, and proceed to step 7. Step 6: Close the first, second, and fifth pneumatic valves via the host computer to disconnect the control air source; release the sixth pneumatic valve via the host computer to purge the gas from the inspection air source pipeline; purge the control branches of the CT1, CT2, and PRGCTL control terminals of the digital pressure instrument via the first, second, and fifth pneumatic valves via the host computer. Step 7: Control the first, second, and fifth pneumatic valves via the host computer to purge the gas from the control branches of the CT1, CT2, and PRGCTL control terminals of the digital pressure instrument. Switch the digital pressure instrument to measurement mode and determine the leakage path by observing the measurement values ​​of each channel of the digital pressure instrument.

2. The bench pneumatic pressure measurement system pipeline sealing inspection equipment according to claim 1, characterized in that, The control gas source is equipped with a first pressure reducing valve.

3. The bench pneumatic pressure measurement system pipeline sealing inspection equipment according to claim 2, characterized in that, The control gas source is used to provide control gas of 90–120 psi.

4. The test bench pneumatic pressure measurement system pipeline sealing inspection device according to claim 1, characterized in that, The inspection gas source is equipped with a second pressure reducing valve.

5. The bench pneumatic pressure measurement system pipeline sealing inspection equipment according to claim 4, characterized in that, In step four, while opening the second pressure reducing valve and adjusting the test gas source to bring the test gas in the test gas source pipeline to the required pressure, confirm that the pressure of the test gas in the test gas source pipeline does not exceed the range of the digital pressure gauge under test.

6. The bench pneumatic pressure measurement system pipeline sealing inspection device according to claim 5, characterized in that, In steps six and seven, while controlling the first, second, and fifth pneumatic valves via the host computer to purge the gas from the control branches of the CT1, CT2, and PRGCTL control terminals of the digital pressure instrument, it is confirmed that the pressure of the test gas in the test gas source pipeline does not exceed the range of the digital pressure instrument under test.

Images