A ground gas supply and distribution system capable of automated self-checking

Abstract

The application is suitable for the field of space launch technology, and provides a ground gas supply and distribution system capable of realizing automatic self-checking, comprising a control system and valve action test gas path modules, pressure reducing valve steady pressure performance test gas path modules, air tightness test gas path modules and pressure transmitter calibration gas path modules electrically connected with the control system; the valve action test gas path modules and the air tightness test gas path modules have the same gas path structure, and share the same set of hardware gas paths; the control system realizes valve action test and air tightness test functions on the hardware gas paths by executing different automatic test processes; the application simplifies the system gas path structure, realizes automatic self-checking of the whole process, greatly reduces the operation intensity of personnel, shortens the test process, reduces human error operation, and improves the system test efficiency and reliability.

Description

Technical Field

[0001] This invention relates to the field of aerospace launch technology, specifically a ground-based gas supply and distribution system capable of automated self-testing. Background Technology

[0002] A ground-based gas supply system is a comprehensive system consisting of equipment and accessories designed to supply different types and parameters of compressed gas to missiles, rockets, and other ground equipment from the ground. It is an important component of missile or rocket ground equipment. Before the rocket arrives at the launch site, the ground-based gas supply and distribution equipment must undergo self-inspection to ensure that the system's functions and performance meet the required specifications.

[0003] Ground-based gas supply and distribution systems, based on their system characteristics, typically require self-inspection items including: valve operation testing, pressure reducing valve performance testing, system airtightness testing, and local calibration of pressure transmitters. Traditional manual gas distribution stations perform equipment self-inspections manually, recording and interpreting parameters. This existing technology has the following drawbacks: high personnel workload, lengthy testing processes for ground equipment, and the risk of human error. Therefore, there is an urgent need to provide a ground-based gas supply and distribution system capable of automated self-inspection to overcome the shortcomings in current practical applications. Summary of the Invention

[0004] The purpose of this invention is to provide a ground gas supply and distribution system that can achieve automated self-testing, in order to solve the problems mentioned in the background art.

[0005] The present invention is implemented as follows: a ground gas supply and distribution system capable of automated self-testing includes a control system and a valve action test gas circuit module, a pressure reducing valve pressure stabilization performance test gas circuit module, an air tightness test gas circuit module, and a pressure transmitter calibration gas circuit module electrically connected to the control system.

[0006] The valve action test air circuit module and the air tightness test air circuit module have the same air circuit structure and share the same set of hardware air circuits. The control system implements valve action test and air tightness test functions on the hardware air circuits by executing different automated test processes.

[0007] As a further aspect of the present invention: the hardware air circuit includes an air source interface, a filter, at least one set of fully electrically controlled pneumatic ball valves, a remote-controlled pressure reducing valve, and a venting branch connected in sequence to a high-pressure metal pipe and a high-pressure air circuit connector.

[0008] The high-pressure metal pipeline is equipped with multiple pressure transmitters, and each pressure transmitter is electrically connected to the control system.

[0009] The venting branch includes a venting solenoid valve and a silencer, and the venting solenoid valve is electrically connected to the control system.

[0010] The high-pressure metal pipeline is also connected in series with a manual ball valve and a silencer.

[0011] As a further aspect of the present invention: the pressure transmitter calibration air path module includes a first air path and a second air path;

[0012] The first gas path includes a gas source interface, a filter, at least one set of fully electrically controlled pneumatic ball valves and pressure reducing valves connected in series via a high-pressure metal pipeline and a high-pressure gas path connector. The high-pressure metal pipeline is equipped with multiple pressure transmitters, each of which is electrically connected to the control system. Two branches are connected in series on the high-pressure metal pipeline. One branch is equipped with a manual ball valve and a silencer, and the other branch is equipped with a venting solenoid valve and a silencer.

[0013] The second gas path includes a gas source interface, a filter, at least one set of fully electrically controlled pneumatic ball valves and pressure reducing valves connected in series via a high-pressure metal pipeline and a high-pressure gas path connector. The high-pressure metal pipeline is equipped with multiple pressure transmitters, each of which is electrically connected to the control system. Three branches are connected in series on the high-pressure metal pipeline. The first branch is equipped with a manual ball valve and a silencer, the second branch is equipped with an electro-proportional valve, and the third branch is equipped with a two-position five-way solenoid valve and a pressure transmitter.

[0014] The pressure transmitter calibration air circuit module also includes a calibration pipeline, a calibration manual valve, and a pressure transmitter installed at the end of the calibration pipeline. There are three calibration pipelines, two of which are connected to the first air circuit and the second air circuit respectively, and the other calibration pipeline is connected to both the first air circuit and the second air circuit.

[0015] As a further aspect of the present invention: the pressure-reducing valve pressure-stabilizing performance test air circuit module includes an air source interface, a filter, a pneumatic ball valve and a remote-controlled pressure-reducing valve connected in sequence through a high-pressure metal pipe and a high-pressure air circuit connector; a pressure transmitter is provided before and after the remote-controlled pressure-reducing valve.

[0016] Both the pneumatic ball valve and the remote-controlled pressure reducing valve are electrically connected to the control system.

[0017] As a further aspect of the present invention: the valve action test process built into the control system includes:

[0018] The system sets the valve opening sequence, pressure build-up time, and pressure rise criterion value, and opens each pneumatic ball valve in the hardware air circuit sequentially from upstream to downstream according to the preset sequence.

[0019] After the opening signal of the corresponding pneumatic ball valve is issued, if the pressure value of the pressure transmitter corresponding to the pneumatic ball valve rises to the target pressure value within the preset pressure build-up time, the valve is determined to be open normally.

[0020] After completing the tests on all valves in the hardware pneumatic circuit, the program automatically performs a pass / fail assessment and outputs the test results.

[0021] If a pneumatic ball valve fails during testing, the program will automatically report an error, and subsequent tests will continue after manual troubleshooting.

[0022] As a further aspect of the present invention: the airtightness testing process built into the control system includes internal leakage testing and external leakage testing, specifically as follows:

[0023] The control system presets the stabilization time, holding time, and allowable pressure drop value, and performs segmented tests on the hardware gas circuit in order from upstream to downstream.

[0024] First, test the internal leakage of the current pneumatic ball valve and the external leakage of the upstream pipeline of the valve. After the current pipeline section passes the test, open the current pneumatic ball valve and test the external leakage of its downstream pipeline and the internal leakage of the next pneumatic ball valve.

[0025] The test proceeds sequentially to the end of the hardware gas circuit, automatically recording the pressure difference of each section and automatically determining the pass / fail status and outputting the test results.

[0026] As a further aspect of the present invention: the pressure-regulating performance test procedure of the pressure-reducing valve built into the control system includes:

[0027] The system controls the remote pressure reducing valve to adjust the pressure to the preset target pressure under static non-supply conditions by pre-setting the pressure stabilization time, pressure holding time, and pressure rise allowable value.

[0028] After the pre-pressure stabilization is completed, the pressure holding test is entered. After the pressure holding time reaches the preset value, the pressure rise value of the pressure transmitter downstream of the remote control pressure reducing valve is detected.

[0029] If the pressure rise is within the preset allowable range, the remote-controlled pressure reducing valve is deemed to have qualified pressure stabilization performance; otherwise, it is deemed to be faulty and the program will automatically report an error.

[0030] As a further aspect of the present invention: the calibration process for the pressure transmitter built into the control system includes:

[0031] Preset the reading stabilization time and the acceptable range of indication difference, and uniformly select at least a few pressure calibration points within the full scale of the pressure transmitter to be calibrated.

[0032] Open the manual valve between the pressure transmitter to be calibrated and the calibration pipeline, adjust the calibration pressure to the pressure value corresponding to the current calibration point, and after stabilizing the pressure for a preset time, the control system automatically reads the readings of the high-precision pressure transmitter and the pressure transmitter to be calibrated, and calculates the difference in readings.

[0033] After completing the tests at all pressure calibration points in sequence, the system automatically performs a pass / fail assessment and generates a calibration result table.

[0034] If the pressure transmitter to be calibrated is determined to be unqualified, the program will prompt for replacement or adjustment.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] This invention is based on a fully electronic control mode. With over 80% of the gas supply system valves capable of remote control, it incorporates a well-designed auxiliary self-inspection process pipeline. Through automated program control, it achieves automated self-inspection, data interpretation, and automatic generation of test record forms. The aim is to improve the system's level of automation, shorten the testing process for ground equipment, reduce the number of operators and their workload, and, by using an electronic control mode for self-inspection, reduce the probability of human error. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the valve action test air circuit module in this invention.

[0039] Figure 2 This is a logical diagram of the valve action test in this invention.

[0040] Figure 3 This is a schematic diagram of the air circuit module for testing the pressure-regulating performance of the pressure-reducing valve in this invention.

[0041] Figure 4 This is a logic diagram for testing the pressure-regulating performance of the pressure-reducing valve in this invention.

[0042] Figure 5 This is a schematic diagram of the air tightness test gas path module in this invention.

[0043] Figure 6 This is a schematic diagram of the control logic for the airtightness test in this invention.

[0044] Figure 7This is a schematic diagram of the pressure transmitter calibration air circuit module in this invention.

[0045] In the attached diagram: 1-Filter, 2-Pneumatic ball valve, 3-Pressure transmitter, 4-Vent solenoid valve, 5-Silencer, 6-Remote pressure reducing valve, 7-Manual ball valve, 8-Pressure reducing valve, 9-Electrical proportional valve, 10-Two-position five-way solenoid valve, 11-Verification manual valve. Detailed Implementation

[0046] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] The present invention will be further explained below with reference to specific embodiments.

[0048] Please see Figures 1-7 The present invention provides a ground gas supply and distribution system capable of automated self-testing, including a control system and a valve action test gas circuit module, a pressure reducing valve pressure stabilization performance test gas circuit module, an air tightness test gas circuit module and a pressure transmitter calibration gas circuit module electrically connected to the control system.

[0049] The valve action test air circuit module and the air tightness test air circuit module have the same air circuit structure and share the same set of hardware air circuits. The control system implements valve action test and air tightness test functions on the hardware air circuits by executing different automated test processes.

[0050] In a more specific example, the hardware pneumatic circuit includes a gas source interface, a filter 1, at least one set of fully electrically controlled pneumatic ball valves 2 connected in series, a remote-controlled pressure reducing valve 6, and a venting branch, all connected in sequence via a high-pressure metal pipe and a high-pressure pneumatic circuit connector.

[0051] The high-pressure metal pipeline is equipped with multiple pressure transmitters 3, and each pressure transmitter 3 is electrically connected to the control system.

[0052] The venting branch includes a venting solenoid valve 4 and a silencer 5, and the venting solenoid valve 4 is electrically connected to the control system.

[0053] The high-pressure metal pipeline is also connected in series with a manual ball valve 7 and a silencer 5.

[0054] In a more specific example, the pressure transmitter calibration air path module includes a first air path and a second air path;

[0055] The first gas path includes a gas source interface, a filter 1, at least one set of fully electrically controlled pneumatic ball valves 2 and pressure reducing valves 8 connected in sequence to a high-pressure metal pipeline and a high-pressure gas path connector. The high-pressure metal pipeline is equipped with multiple pressure transmitters 3, each of which is electrically connected to the control system. Two branches are connected in series on the high-pressure metal pipeline. One branch is equipped with a manual ball valve 7 and a silencer 5, and the other branch is equipped with a venting solenoid valve 4 and a silencer 5.

[0056] The second gas path includes a gas source interface, a filter 1, at least one set of fully electrically controlled pneumatic ball valves 2 and pressure reducing valves 8 connected in series to a high-pressure metal pipeline and a high-pressure gas path connector. The high-pressure metal pipeline is equipped with multiple pressure transmitters 3, each of which is electrically connected to the control system. Three branches are connected in series on the high-pressure metal pipeline. The first branch is equipped with a manual ball valve 7 and a silencer 5. The second branch is equipped with an electro-proportional valve 9. The third branch is equipped with a two-position five-way solenoid valve 10 and a pressure transmitter 3.

[0057] The pressure transmitter calibration air circuit module also includes a calibration pipeline, a calibration manual valve 11, and a pressure transmitter 3 installed at the end of the calibration pipeline. There are three calibration pipelines, two of which are connected to the first air circuit and the second air circuit respectively, and the other calibration pipeline is connected to both the first air circuit and the second air circuit.

[0058] In a more specific example, the pressure-reducing valve pressure-stabilizing performance test air circuit module includes an air source interface, a filter 1, a pneumatic ball valve 2 and a remote-controlled pressure-reducing valve 6 connected in sequence to a high-pressure metal pipe and a high-pressure air circuit connector. The remote-controlled pressure-reducing valve 6 is equipped with a pressure transmitter 3 both before and after the valve.

[0059] Both the pneumatic ball valve 2 and the remote-controlled pressure reducing valve 6 are electrically connected to the control system.

[0060] In a more specific example, the valve action test procedure built into the control system includes:

[0061] The system sets the valve opening sequence, pressure build-up time, and pressure rise criterion value, and opens each pneumatic ball valve 2 in the hardware air circuit sequentially from upstream to downstream according to the preset sequence.

[0062] After the opening signal of the corresponding pneumatic ball valve 2 is issued, if the pressure value of the pressure transmitter 3 corresponding to the pneumatic ball valve 2 rises to the target pressure value within the preset pressure build-up time, the valve is determined to be open normally.

[0063] After completing the tests on all valves in the hardware pneumatic circuit, the program automatically performs a pass / fail assessment and outputs the test results.

[0064] If a certain pneumatic ball valve 2 fails during testing, the program will automatically report an error, and subsequent tests will continue after manual troubleshooting.

[0065] In a more specific example, the airtightness testing process built into the control system includes internal leakage testing and external leakage testing, specifically as follows:

[0066] The control system presets the stabilization time, holding time, and allowable pressure drop value, and performs segmented tests on the hardware gas circuit in order from upstream to downstream.

[0067] First, test the internal leakage of the current pneumatic ball valve 2 and the external leakage of the upstream pipeline of the valve. After the current pipeline section passes the test, open the current pneumatic ball valve 2 and test the external leakage of its downstream pipeline and the internal leakage of the next pneumatic ball valve 2.

[0068] The test proceeds sequentially to the end of the hardware gas circuit, automatically recording the pressure difference of each section and automatically determining the pass / fail status and outputting the test results.

[0069] In a more specific example, the pressure-regulating performance test procedure for the pressure-reducing valve built into the control system includes:

[0070] The system controls the remote pressure reducing valve 6 to adjust the pressure to the preset target pressure under static non-supply conditions by pre-setting the pressure stabilization time, pressure holding time and pressure rise allowable value;

[0071] After the pre-pressure stabilization is completed, the pressure holding test is entered. After the pressure holding time reaches the preset value, the pressure rise value of the pressure transmitter 3 downstream of the remote control pressure reducing valve 6 is detected.

[0072] If the pressure rise is within the preset allowable range, the pressure stabilizing performance of the remote-controlled pressure reducing valve 6 is deemed qualified; otherwise, it is deemed a fault, and the program will automatically report an error.

[0073] In a more specific example, the pressure transmitter verification process built into the control system includes:

[0074] Set the preset reading stabilization time and the acceptable range of indication difference, and evenly select at least 5 pressure calibration points within the full scale of the pressure transmitter 3 to be calibrated.

[0075] Open the calibration manual valve 11 between the corresponding pressure transmitter 3 to be calibrated and the calibration pipeline, adjust the calibration pressure to the pressure value corresponding to the current calibration point, stabilize the pressure for a preset time, and the control system automatically reads the readings of the high-precision pressure transmitter and the pressure transmitter 3 to be calibrated, and calculates the difference in readings.

[0076] After completing the tests at all pressure calibration points in sequence, the system automatically performs a pass / fail assessment and generates a calibration result table.

[0077] If the pressure transmitter 3 to be calibrated is determined to be unqualified, the program will prompt for replacement or adjustment.

[0078] In this embodiment, the self-inspection items of the gas supply system include four items: valve operation test, pressure reducing valve pressure stabilization performance test, airtightness test, and pressure transmitter 3 inspection. 1. The gas supply system supplies and shuts off gas through the opening and closing of valves. The purpose of the valve operation test is to ensure that the valves meet the usage requirements in the early stages of system operation. 2. The pressure reducing valve pressure stabilization performance test is also a type of valve operation test. Because the pressure reducing valve needs to supply a certain flow rate of gas downstream at a stable pressure during the gas supply process, in addition to the basic operation test, its pressure stabilization performance should also be tested separately to ensure that the gas supply process does not exceed the pressure limit. 3. The purpose of the airtightness test is to ensure the sealing performance of the entire system under working pressure. Only a system with good airtightness can be put into use. 4. Due to the special properties of its measuring instruments, the pressure transmitter 3 needs to be periodically calibrated to ensure that its output pressure parameters are without deviation and to ensure the reliable operation of the system. These four tests are indispensable for the normal and reliable operation of the gas supply system.

[0079] The different self-test items describe the technical solutions, as follows:

[0080] Valve actuation testing is mainly divided into two methods: energized but not gas-operated, and energized and gas-operated. Generally, energized testing is performed first. After passing the energized test, gas is supplied for testing. Assuming the main gas supply valves are fully electrically controlled, a pressure transmitter 3 with a matching range is installed after each pressure reducing valve and the main gas supply valve. The valve is considered to be open normally if the pressure value of the downstream pressure transmitter 3 rises to the target pressure value within 2 seconds after the valve opening signal is issued. Valve actuation testing follows a fixed sequence, using a sequential opening and judgment mode along a gas supply chain. After setting the preconditions, click "Start Test." The test program will then proceed from upstream to downstream. If there are no faults, the test will continue until the last valve in the current gas supply module is tested. The program will automatically determine the pass / fail status and provide a conclusion. If a valve test fails, the program will report an error. After manual troubleshooting, subsequent tests can continue. This example uses the compartment purging gas supply module; the gas path design is described below. Figure 1 The test logic interface can be found here. Figure 2 For ground-based gas supply systems, each independent gas supply module should be tested independently.

[0081] The pressure-regulating performance test of the pressure-reducing valve involves adjusting the pressure under static, non-supply conditions and observing whether there is a significant increase in downstream pressure. If the pressure increase is within the allowable range, the pressure-reducing valve is considered to meet the usage requirements and can be used for launch missions. If it exceeds the allowable range, the sealing surface is considered to be damaged or other faults have occurred, and the valve can only be put into use after the faults have been resolved.

[0082] The pressure-regulating performance test of the pressure-regulating valve uses the following pneumatic circuit principle: Figure 3 See the test logic. Figure 4 .

[0083] The airtightness test is divided into internal leakage test and external leakage test. The internal leakage test is carried out in the order from upstream to downstream. First, the internal leakage of the valve and the external leakage of the pipeline upstream of the valve are tested. After the current pipeline section passes the test, the valve under test is opened and the external leakage of the downstream pipeline and the internal leakage of the next valve are tested. The test is carried out in sequence until the end of the pipeline. This completes the test of the internal leakage of all valves and the external leakage of pipelines under the gas supply module under test. The segment pressure difference is recorded and the test conclusion is given by the automatic program.

[0084] The airtightness test will still be explained using the compartment purging pipeline as an example. The air circuit diagram is shown below. Figure 5 See control logic Figure 6 ,exist Figure 6 In the middle, valve No. 2 is the first pneumatic ball valve 2 from left to right, and pressure regulation is achieved by the third pressure transmitter 3 from left to right. In the unloading of the pressure reducing valve, the pressure reducing valve is the remote control pressure reducing valve 6, and the pneumatic ball valve is the second pneumatic ball valve 2 from left to right.

[0085] The ground-based gas supply and distribution system is equipped with numerous pressure transmitters 3 for measuring pressure at different locations and interpreting data. Due to the special nature of these measuring instruments, the pressure transmitters 3 require periodic (conventional products require inspection every six months) removal and calibration by a professional institution before they can be put into system use with a certificate of conformity. This invention adopts a standardized design for the pressure transmitters 3 during system design, minimizing the number of ranges (ideally no more than three). Pressure transmitters 3 with the same range have a test pipeline connected to a single calibration port. A high-precision pressure transmitter 3 is installed at the end of this calibration port, and it performs online calibration of the lower-precision pressure transmitters used for actual measurements. An automated program interprets the data and provides the calibration conclusion. This reduces the workload of manually removing a large number of pressure transmitters 3. During non-mission periods, the high-precision pressure transmitters 3 can be manually removed and sent to a professional institution for calibration, ensuring the accuracy of the calibration during the initial equipment self-inspection before missions. This solution uses the compartment purging and control gas supply modules as examples to illustrate the setup and usage process of the calibration pipeline. The gas circuit diagram can be found here. Figure 7 The control logic is shown in Table 1. Under the premise that the preconditions of the valve to be tested are ready, adjust the test pressure, click "Start Test", and the program will automatically perform operations such as pressure stabilization, reading, data interpretation, and qualification judgment. The gas supply module with automatic pressure adjustment will automatically adjust the test pressure by the pressure reducing valve before performing the test operation.

[0086] Table 1. Schematic diagram of test logic for pressure transmitter 3

[0087]

[0088] With the coordination of the above four pipeline system designs and control system processes, operators only need to confirm the preconditions and perform test operations on the human-machine interface to complete the above four equipment self-tests. Since the actual gas supply system pipeline setup is more complex than the schematic diagram, the actual test logic is more complex than the schematic diagram. It is necessary to comprehensively consider the actual pipeline setup, and at the same time, it is necessary to combine the post-testing pipeline venting and pressure reducing valve unloading operations.

[0089] In summary, the valve action test principle is illustrated. Figure 1 , Figure 2 First, the operator confirms the prerequisites: the system has a gas supply, the control gas circuit is pressure-regulated, and the remote pressure reducing valve 6 is used for pressure regulation. The operator sets the valve opening sequence time interval, the pressure transmitter 3 pressure build-up time, and the pressure rise criterion value on the operation interface. After setting, click "Start Valve Test," and the system will open the valves in the preset parameter sequence and read the data. If a valve failure occurs during the test, the program will stop automatically. After troubleshooting, the test can be restarted until the test is completed and the program will provide a conclusion.

[0090] Demonstration of the pressure-regulating valve stability test principle Figure 3 , Figure 4 Before the test begins, the operator confirms the prerequisites. The status of each manual valve to be operated is confirmed. The system gas supply is activated, and the control gas circuit is pressure regulated and supplied. The operator sets the stabilization time, holding time, and pass / fail criteria values ​​in advance on the test interface. The pressure adjustment values ​​are set according to the actual pressure adjustment values ​​required by each pressure reducing valve in the launch process. The operator clicks "Start Test" on the interface, and the program and equipment automatically execute the test process and complete the pass / fail judgment. Pressure reducing valves that are judged to be unqualified in the test need to be manually troubleshooted or replaced with spare parts to ensure that the valves used in the system meet the performance requirements of the launch process.

[0091] Principle of airtightness test Figure 5 , Figure 6 Operators must first confirm the prerequisites, set the pressure stabilization time, pressure holding time, and pass / fail criteria, and adjust the pressure reducing valve according to the pressure level required for the air tightness test of different gas supply modules. After the preparation is completed, air tightness tests are carried out sequentially for each gas supply module. Click "Start Test" on the operation interface, and the program will automatically execute the test process and complete the pass / fail judgment. If it fails, the operator needs to troubleshoot and re-perform the test until it passes.

[0092] Pressure gauge calibration test principle demonstration Figure 7Table 1 illustrates the verification method, which is the same as that used by third-party verification agencies. A high-precision meter (hereinafter referred to as the standard meter) is used to verify a low-precision meter (hereinafter referred to as the test meter). Five to six different pressure values ​​are evenly selected within the full scale of the test pressure transmitter 3 for comparison between the standard meter and the test meter. The operator sets the reading stabilization time and the acceptable range of the difference based on the actual accuracy of the test meter. After setting these parameters, the pre-operation conditions are confirmed (mainly confirming the opening of the verification hand valve 11 and the sealing status of the pipeline end). After completing the pre-operation conditions, click "Start Test" on the test interface. For gas circuits with automatic pressure regulation, verification can be performed automatically. For gas circuits without automatic pressure regulation, each pressure verification value must be manually adjusted. The process of reading values ​​and interpreting data is completed by an automated program. The final completed test interface is the test result table. Pressure transmitters 3 that fail the test should be promptly sent to a professional agency or manufacturer for calibration or replacement.

[0093] It is worth noting that the above test principle is only illustrated for a specific gas circuit module. In actual use, there are many gas circuit modules, and some gas circuit modules share a gas source. When compiling the control logic, the actual control logic should be compiled according to the design principles described in this invention. The configurable values ​​mentioned in the control logic, such as pressure stabilization time, pressure holding time, and pressure drop allowable value, need to be comprehensively considered based on the actual operating pressure range and system pipeline design.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ground-based gas supply and distribution system capable of automated self-testing, characterized in that, It includes a control system and a valve action test air circuit module, a pressure reducing valve pressure stabilization performance test air circuit module, an air tightness test air circuit module, and a pressure transmitter calibration air circuit module that are electrically connected to the control system. The valve action test air circuit module and the air tightness test air circuit module have the same air circuit structure and share the same set of hardware air circuits. The control system implements valve action test and air tightness test functions on the hardware air circuits by executing different automated test processes.

2. The ground gas supply and distribution system capable of automated self-testing according to claim 1, characterized in that, The hardware gas circuit includes a gas source interface, a filter (1), at least one set of fully electrically controlled pneumatic ball valves (2), a remote control pressure reducing valve (6), and a venting branch connected in sequence through a high-pressure metal pipe and a high-pressure gas circuit connector. The high-pressure metal pipeline is equipped with multiple pressure transmitters (3), and each pressure transmitter (3) is electrically connected to the control system. The venting branch includes a venting solenoid valve (4) and a silencer (5), and the venting solenoid valve (4) is electrically connected to the control system. The high-pressure metal pipeline is also connected in series with a manual ball valve (7) and a silencer (5).

3. The ground gas supply and distribution system capable of automated self-testing according to claim 1, characterized in that, The pressure transmitter calibration air path module includes a first air path and a second air path. The first gas path includes a gas source interface, a filter (1), at least one set of fully electrically controlled pneumatic ball valves (2) and pressure reducing valves (8) connected in sequence through a high-pressure metal pipeline and a high-pressure gas path connector. The high-pressure metal pipeline is equipped with multiple pressure transmitters (3), each of which is electrically connected to the control system. The high-pressure metal pipeline is connected in series with two branches, one of which is equipped with a manual ball valve (7) and a silencer (5), and the other branch is equipped with a venting solenoid valve (4) and a silencer (5). The second gas path includes a gas source interface, a filter (1), at least one set of fully electrically controlled pneumatic ball valves (2) and pressure reducing valves (8) connected in series through a high-pressure metal pipeline and a high-pressure gas path connector. The high-pressure metal pipeline is equipped with multiple pressure transmitters (3), each of which is electrically connected to the control system. Three branches are connected in series on the high-pressure metal pipeline. The first branch is equipped with a manual ball valve (7) and a silencer (5), the second branch is equipped with an electric proportional valve (9), and the third branch is equipped with a two-position five-way solenoid valve (10) and a pressure transmitter (3). The pressure transmitter calibration air circuit module also includes a calibration pipeline, a calibration manual valve (11), and a pressure transmitter (3) installed at the end of the calibration pipeline. There are three calibration pipelines, two of which are connected to the first air circuit and the second air circuit respectively, and the other calibration pipeline is connected to both the first air circuit and the second air circuit.

4. The ground gas supply and distribution system capable of automated self-testing according to claim 1, characterized in that, The pressure-reducing valve pressure-stabilizing performance test air circuit module includes an air source interface, a filter (1), a pneumatic ball valve (2) and a remote control pressure-reducing valve (6) connected in sequence through a high-pressure metal pipe and a high-pressure air circuit connector. The remote control pressure-reducing valve (6) is equipped with a pressure transmitter (3) before and after the valve. Both the pneumatic ball valve (2) and the remote pressure reducing valve (6) are electrically connected to the control system.

5. The ground gas supply and distribution system capable of automated self-inspection according to claim 2, characterized in that, The valve action test procedure built into the control system includes: The system controls the pneumatic ball valves in the hardware air circuit to open sequentially from upstream to downstream according to the preset valve opening sequence, pressure build-up time and pressure rise criterion value (2). After the opening signal of the corresponding pneumatic ball valve (2) is issued, if the pressure value of the pressure transmitter (3) corresponding to the pneumatic ball valve (2) rises to the target pressure value within the preset pressure building time, the valve is determined to be open normally. After completing the tests on all valves in the hardware pneumatic circuit, the program automatically performs a pass / fail assessment and outputs the test results. If a certain pneumatic ball valve (2) fails during testing, the program will automatically report an error, and subsequent tests will continue after manual troubleshooting.

6. The ground gas supply and distribution system capable of automated self-testing according to claim 2, characterized in that, The built-in airtightness testing process of the control system includes internal leakage testing and external leakage testing, specifically as follows: The control system presets the stabilization time, holding time, and allowable pressure drop value, and performs segmented tests on the hardware gas circuit in order from upstream to downstream. First, test the internal leakage of the current pneumatic ball valve (2) and the external leakage of the upstream pipeline of the valve. After the current pipeline section passes the test, open the current pneumatic ball valve (2) and test the external leakage of its downstream pipeline and the internal leakage of the next pneumatic ball valve (2). The test proceeds sequentially to the end of the hardware gas circuit, automatically recording the pressure difference of each section and automatically determining the pass / fail status and outputting the test results.

7. The ground gas supply and distribution system capable of automated self-testing according to claim 4, characterized in that, The pressure-regulating performance test procedure for the pressure-reducing valve built into the control system includes: The system controls the remote pressure reducing valve (6) to adjust the pressure to the preset target pressure under static non-supply conditions by setting the preset pressure stabilization time, pressure holding time and pressure rise allowable value; After the pre-pressure stabilization is completed, the pressure holding test is entered. After the pressure holding time reaches the preset value, the pressure rise value of the pressure transmitter (3) downstream of the remote control pressure reducing valve (6) is detected. If the pressure rise is within the preset allowable range, the pressure stabilization performance of the remote control pressure reducing valve (6) is deemed qualified; otherwise, it is deemed a fault and the program will automatically report an error.

8. The ground gas supply and distribution system capable of automated self-testing according to claim 3, characterized in that, The pressure transmitter calibration process built into the control system includes: Preset the reading stabilization time and the acceptable range of the indication difference, and uniformly select at least 5 pressure calibration points within the full scale of the pressure transmitter (3) to be calibrated; Open the calibration manual valve (11) between the corresponding pressure transmitter (3) to be calibrated and the calibration pipeline, adjust the calibration pressure to the pressure value corresponding to the current calibration point, stabilize the pressure for a preset time, and the control system automatically reads the readings of the high-precision pressure transmitter and the pressure transmitter (3) to be calibrated and calculates the difference in readings. After completing the tests at all pressure calibration points in sequence, the system automatically performs a pass / fail assessment and generates a calibration result table. If the pressure transmitter (3) to be calibrated is determined to be unqualified, the program will prompt for replacement or adjustment.

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