Redundancy control structure, control method and control device of flow control gas circuit

Abstract

The invention provides a redundancy control structure, a control method and a control device of a flow control gas circuit, and solves the technical problem that the control precision and the control reliability of an existing gas circuit have defects. The structure comprises a first basic pipeline and a second basic pipeline which are sequentially communicated in series; the manual throttle valve forms on-off control and gas flow control of the first basic pipeline; the pressure sensor is used for collecting the gas pressure of the downstream pipeline of the control gas path on the second basic pipeline; the first redundant pipeline and the second redundant pipeline form a first redundant gas supply path and a second redundant gas supply path which are communicated with the first basic pipeline in parallel; the first master control electromagnetic valve and the second master control electromagnetic valve are controlled to control connection and disconnection of the first redundant gas supply circuit and the second redundant gas supply circuit respectively; the first throttling element and the second throttling element are controlled to adjust the flow resistance of the first redundant gas supply channel and the flow resistance of the second redundant gas supply channel respectively. Automatic pneumatic elements are adopted to form gas supply / deflation redundancy design, high reliability of a flow control gas circuit is achieved, and it is guaranteed that the target requirement for unattended operation in the filling process is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas pipeline, in particular to a redundant control structure, a control method and a control device of a flow control gas circuit. BACKGROUND

[0002] The gas cylinder of an external rocket engine and the gas cylinder for supplementing pressure generally requires a smooth and slow charging and discharging speed. In the prior art, a manual throttle valve is usually used to realize gas supply. The working principle thereof is generally that a gas source (the pressure is generally 23-45 MPa) is delivered to the inlet of the manual throttle valve, and an operator adjusts the opening degree of the manual throttle valve according to the pressure change of the gas cylinder to realize the charging process. When the charging work of the gas cylinder is to charge multiple gas cylinders at the same time, the operator needs to observe the charging rates of multiple gas cylinders and command multiple operators to adjust the opening degree of the throttle valve, which requires a high degree of concentration of the operator. Part of the charging work lasts to the low-temperature propellant filling stage, which delays the evacuation time of personnel and cannot realize the goal of unattended filling stage. The gas source for charging the gas cylinder is generally of fixed pressure, and the flow rate is generally adjusted by adjusting the flow resistance of the pipeline. In the case where the flow resistance of the pipeline is constant, the charging rate will gradually slow down. In order to ensure the stability of the charging rate, the flow resistance of the system needs to be reduced as the pressure of the gas cylinder rises. For the whole working process of the gas cylinder, different media are often used in different working stages, and the charging rate requirements are basically the same, so the flow resistance of the system needs to be adjusted according to different media. In addition to charging, the gas cylinder also has rate requirements for discharging, so the system also needs to adjust the flow resistance according to the discharge flow rate requirements. The charging flow rate of the gas cylinder is generally very small (0.04-18 g / s of 35 MPa helium), and a general regulating valve cannot effectively adjust the flow resistance of the system under such a small flow rate requirement. Therefore, a flow control gas circuit needs to be developed for the charging of the gas cylinder and similar working conditions to realize the flow control with high reliability for the above working conditions, improve the automation degree of the system and reduce the personnel operation. SUMMARY

[0003] In view of the above problems, the embodiments of the present application provide a redundant control structure, a control method and a control device of a flow control gas circuit, which solve the technical problem that the control precision and control reliability of the existing gas circuit are defective.

[0004] The redundant control structure of the flow control gas circuit of the embodiments of the present application comprises:

[0005] A first basic pipeline and a second basic pipeline connected in sequence and in series, used to form a gas supply circuit between a gas source interface on the first basic pipeline side and a gas supply interface on the second basic pipeline side;

[0006] A manual throttle valve, used to manually adjust the opening degree of the throttle valve to form the on-off control and the gas flow control of the first basic pipeline;

[0007] a pressure sensor for collecting pressure state of the control gas path downstream pipeline on the second base pipeline, forming field pressure feedback data available for correcting the control process;

[0008] Further comprising:

[0009] a first redundant pipeline for forming a first redundant gas supply path in parallel communication with the first base pipeline;

[0010] a first main control solenoid valve for controlled control of the connection and cut-off of the first redundant gas supply path;

[0011] a first throttling element for controlled regulation of the flow resistance of the first redundant gas supply path;

[0012] a second redundant pipeline for forming a second redundant gas supply path in parallel communication with the first base pipeline;

[0013] a second main control solenoid valve for controlled control of the connection and cut-off of the second redundant gas supply path;

[0014] a second throttling element for controlled regulation of the flow resistance of the second redundant gas supply path.

[0015] In an embodiment of the present application, further comprising:

[0016] a third throttling element for controlled regulation of the flow resistance of the second base pipeline.

[0017] In an embodiment of the present application, further comprising:

[0018] a third base pipeline for communication with the second base pipeline, forming a gas exhaust path between the first base pipeline side gas source interface P and the third base pipeline side gas exhaust interface R through the second base pipeline;

[0019] a manual cut-off valve for manually controlling the on-off of the third base pipeline;

[0020] a redundant exhaust pipeline for forming a redundant gas exhaust path in parallel communication with the third base pipeline on the second base pipeline;

[0021] an exhaust solenoid valve for controlled control of the on-off of the redundant gas exhaust path;

[0022] an exhaust throttling element for controlled regulation of the flow resistance of the redundant gas exhaust path.

[0023] In an embodiment of the present application, further comprising:

[0024] a cut-off solenoid valve for controlled control of the on-off of the second base pipeline 2.

[0025] The flow control method of the embodiment of the present application utilizes the redundant control structure as described above, comprising:

[0026] The automatic gas supply process is initialized, the first main control electromagnetic valve and the second main control electromagnetic valve are controlled according to the flow demand to open the first redundant gas supply gas path and the second redundant gas supply gas path to supply gas, and in the gas supply process, the first throttling element, the second throttling element and the third throttling element are controlled according to the pressure data fed back by the pressure sensor to adjust the pressure of the corresponding gas path.

[0027] The first main control electromagnetic valve and the second main control electromagnetic valve are controlled according to the flow demand to close the first redundant gas supply gas path and the second redundant gas supply gas path to stop gas supply, and in the stopping process, the gas supply stopping state is judged according to the pressure data fed back by the pressure sensor.

[0028] In an embodiment of the present application, the automatic gas supply process is initialized, the first main control electromagnetic valve and the second main control electromagnetic valve are controlled according to the flow demand to open the first redundant gas supply gas path and the second redundant gas supply gas path to supply gas, and in the gas supply process, the first throttling element, the second throttling element and the third throttling element are controlled according to the pressure data fed back by the pressure sensor to adjust the pressure of the corresponding gas path.

[0029] In the gas supply process of the single-path redundant gas supply gas path, when the pressure state fed back by the pressure sensor continuously decreases or is less than a threshold value, the other redundant gas supply gas path is controlled to be opened to perform redundant gas supply.

[0030] The first throttling element, the second throttling element and the third throttling element are controlled to adjust the pressure of each pipeline.

[0031] In an embodiment of the present application, the automatic gas supply process is initialized, the first main control electromagnetic valve and the second main control electromagnetic valve are controlled according to the flow demand to open the first redundant gas supply gas path and the second redundant gas supply gas path to supply gas, and in the gas supply process, the first throttling element, the second throttling element and the third throttling element are controlled according to the pressure data fed back by the pressure sensor to adjust the pressure of the corresponding gas path.

[0032] In the gas supply stopping process, when the pressure state fed back by the pressure sensor continuously rises or is higher than a threshold value, the discharge electromagnetic valve and the discharge throttling element are cooperatively controlled, the redundant discharge pipeline is connected, and the gas pressure of the redundant discharge pipeline is adjusted.

[0033] The flow control device of the embodiment of the present application comprises:

[0034] The memory is used for storing program codes in the control process of the flow control method.

[0035] The processor is used for executing the program codes.

[0036] The flow control device of the embodiment of the present application comprises:

[0037] The inflation starting control module is used for initializing the automatic gas supply process, controlling the first main control electromagnetic valve and the second main control electromagnetic valve according to the flow demand to open the first redundant gas supply gas path and the second redundant gas supply gas path to supply gas, and controlling the first throttling element, the second throttling element and the third throttling element according to the pressure data fed back by the pressure sensor to adjust the pressure of the corresponding gas path in the gas supply process.

[0038] The inflation stopping control module is used for controlling the first main control electromagnetic valve and the second main control electromagnetic valve to stop supplying gas according to the flow demand, and stopping the first redundant gas supply path and the second redundant gas supply path, and in the stopping process, the pressure data fed back by the pressure sensor is used to judge the gas supply stopping state.

[0039] In an embodiment of the present application, the inflation starting control module comprises:

[0040] The gas path redundancy control unit is used for controlling the other redundant gas supply path to start and supply gas when the pressure state fed back by the pressure sensor continuously decreases or is less than the threshold value in the single-path redundant gas supply process.

[0041] The gas path parameter adjustment unit is used for adjusting the pressure of each pipeline by controlling the first throttling element, the second throttling element and the third throttling element step by step.

[0042] The inflation stopping control module comprises:

[0043] The gas discharge redundancy control unit is used for controlling the discharge electromagnetic valve and the discharge throttling element to cooperate and control when the pressure state fed back by the pressure sensor continuously increases or is higher than the threshold value in the gas supply stopping process, connecting the redundant discharge pipeline and adjusting the gas pressure of the redundant discharge pipeline.

[0044] The beneficial effects of the redundancy control structure, the control method and the control device of the flow control gas path of the embodiment of the present application compared with the prior art mainly lie in that:

[0045] 1) Reliability: for the important working processes of cylinder inflation and deflation and similar working conditions, a plurality of automatic pneumatic elements are used, the redundancy design of the main control electromagnetic valve gas supply / deflation is adopted, the high reliability of the flow control gas path is realized, and the realization of the unattended target requirement of the filling process is ensured.

[0046] 2) Automation: for the characteristics of the flow control gas path, the pressure state of the downstream of the flow control gas path is detected through the pressure sensor (BP_X), the control strategy is set to act on the main control electromagnetic valve QA_X and QB_X according to the working stage, if the main control electromagnetic valve fails to close in time, the redundant electromagnetic valve is started in time to ensure that the gas path is cut off, and the subsequent flow control gas path is remotely controlled through the control strategy.

[0047] 3) The functions of manual gas supply and deflation are reserved, and the work can be ensured when the system cannot be powered on. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 The figure shows the architecture schematic diagram of the redundancy control structure of the flow control gas path of an embodiment of the present application.

[0049] Figure 2The diagram shown is a flow control method of a flow control method using a redundant control structure of a flow control gas path according to an embodiment of the present invention.

[0050] Figure 3 The diagram shown is a schematic diagram of a flow control device utilizing a redundant control structure of a flow control gas path according to an embodiment of the present invention. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this invention clearer and more understandable, the invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0052] An embodiment of the present invention provides a redundant control structure for the flow control gas path, as shown below. Figure 1 As shown. In Figure 1 In this embodiment, the basic structure of the flow control gas path includes:

[0053] The first basic pipeline 1 and the second basic pipeline 2, connected in series, form a gas supply path between the gas source interface P on the first basic pipeline side and the gas supply interface A on the second basic pipeline side. The gas source interface P is usually connected to a constant pressure gas source, and the gas supply interface A is connected to a specific gas-using project, such as a gas cylinder filling project or similar operating conditions.

[0054] The third basic pipeline 3 is used to connect with the second basic pipeline, forming a venting gas path between the gas source interface P on the first basic pipeline side and the venting gas interface R on the second and third basic pipeline sides. The gas supply path forms the gas supply route from the gas source to the gas-using project, and the venting gas path forms the gas emission route from the gas source to the atmospheric environment.

[0055] The manual throttle valve JL_Y is used to manually adjust the throttle valve opening, forming the basic control of the first basic pipeline for on / off control and gas flow control. The control of the manual throttle valve JL_Y forms the basic control part of the flow control gas circuit.

[0056] The manual shut-off valve JF_Z is used for manual control of the on / off state of the third basic pipeline 3. The manual shut-off valve JF_Z is used to switch between and maintain the gas supply and venting states.

[0057] The pressure sensor BP_X is used to acquire the pressure status of the downstream pipeline of the control gas circuit on the second base pipeline. It obtains the gas pressure of the downstream gas supply pipeline of the flow control gas circuit in real time, forming field pressure feedback data that can be used to correct the control process.

[0058] Specifically, the manual throttle valve JL_Y is connected in series in the first basic pipeline, the inlet of the manual throttle valve JL_Y is connected to the gas source interface P through the first basic pipeline, and the outlet of the manual throttle valve JL_Y is connected to the gas supply interface A through the first basic pipeline and the second basic pipeline. The manual stop valve JF_Z is connected in series in the third basic pipeline 3, the inlet of the manual stop valve JF_Z faces the gas source interface P, and the outlet of the manual stop valve JF_Z faces the gas discharge interface R. The pressure sensor BP_X is arranged on the second basic pipeline.

[0059] The flow control gas circuit of the embodiment of the present application forms a gas circuit topology that inputs gas at a certain pressure through the gas source interface P, connects specific gas use items (gas cylinder charging and similar working conditions) through the gas supply interface A, and communicates with the atmosphere through the gas discharge interface R. The basic structure of the flow control gas circuit ensures the basic manual control and adjustment function of the flow control gas circuit.

[0060] As shown in the embodiment of the present application, the flow control gas circuit further comprises: Figure 1

[0061] The first redundant pipeline 4 is used to form a first redundant gas supply circuit in parallel communication with the first basic pipeline 1.

[0062] The first main control solenoid valve QA_X is used to control the connection and cutoff of the first redundant gas supply circuit.

[0063] The first throttling element XA_X is used to control the flow resistance of the first redundant gas supply circuit.

[0064] The second redundant pipeline 5 is used to form a second redundant gas supply circuit in parallel communication with the first basic pipeline 1.

[0065] The second main control solenoid valve QB_X is used to control the connection and cutoff of the second redundant gas supply circuit.

[0066] The second throttling element XB_X is used to control the flow resistance of the second redundant gas supply circuit.

[0067] Those skilled in the art can understand that the throttling element for adjusting the flow resistance includes but is not limited to a throttle valve, a regulating valve, a pressure reducing valve, a check valve, a butterfly valve, a ball valve, or a balance valve, etc. The on-off, flow and flow resistance of each redundant gas supply circuit are controlled by the electrically or magnetically controlled throttling element in cooperation with the corresponding main control solenoid valve.

[0068] ​Specifically, the first master electromagnetic valve QA_X and the first throttling element XA_X are connected in series in the first redundant pipeline 4, the first throttling element XA_X is arranged downstream of the first master electromagnetic valve QA_X, the second master electromagnetic valve QB_X and the second throttling element XB_X are connected in series in the second redundant pipeline 5, and the second throttling element XB_X is arranged downstream of the second master electromagnetic valve QB_X. The first master electromagnetic valve QA_X and the second master electromagnetic valve QB_X are powered on.

[0069] The redundant control structure of the flow control gas path of the embodiment of the application forms a dual-redundancy flow control gas path relative to the manually controlled flow control base gas path. On the basis of ensuring the safety of the gas path redundancy, the manually controlled throttle valve and the throttling elements are combined to form a three-way adjustment structure of the flow control gas path. Different pipeline flow resistance states of the dual-redundancy parallel flow control gas path are suitable for the flow regulation requirements of different stages and different media of the gas project, and the adjustment flexibility and gas supply safety of the flow control gas path are improved.

[0070] As shown in the figure, Figure 1 As shown in the figure,

[0071] The third throttling element X_X is used for controlled adjustment of the flow resistance of the second base pipeline 2.

[0072] Specifically, the third throttling element X_X is connected in series in the second base pipeline 2 and is located upstream of the third base pipeline 3.

[0073] The redundant control structure of the flow control gas path of the embodiment of the application forms a downstream adjustment structure of the flow control gas path by cooperating the throttling element in the second base pipeline 2 with the throttling elements in the three-way redundant adjustment structure, forms fine adjustment of the flow resistance state of the downstream pipeline of the parallel flow control gas path, is suitable for the flow and flow resistance adjustment requirements of different stages and different media of the gas project, and further improves the adjustment flexibility and gas supply safety of the flow gas path.

[0074] As shown in the figure, Figure 1 As shown in the figure,

[0075] The redundant discharge pipeline 6 is used for parallel communication of the third base pipeline 3 on the second base pipeline 2 to form a redundant discharge gas path.

[0076] The discharge electromagnetic valve F_X is used for controlled control of the on-off of the redundant discharge gas path.

[0077] The discharge throttling element XF_X is used for controlled adjustment of the flow resistance of the redundant discharge gas path.

[0078] The cutoff electromagnetic valve D_X is used for controlled control of the on-off of the second base pipeline 2.

[0079] Specifically, the redundant discharge pipeline 6 is located upstream of the third base pipeline 3, the discharge electromagnetic valve F_X is a high-pressure two-position two-usual closed electromagnetic valve and is connected in series in the redundant discharge pipeline 6. The discharge throttle element XF_X is connected in series downstream of the discharge electromagnetic valve F_X in the redundant discharge pipeline 6, and is controlled to adjust the flow area of the redundant discharge pipeline 6, and cooperates with the action of the discharge electromagnetic valve F_X to realize the flow regulation requirement of the redundant discharge gas path at a certain rate. The cutoff electromagnetic valve D_X is a high-pressure two-position three-usual open electromagnetic valve, and the third outlet is closed. The redundant cutoff electromagnetic valve D_X keeps the inlet and outlet open and is connected in series in the second base pipeline 2 to realize the redundant cutoff function of the flow control gas path and complete the closing action of the gas flow path.

[0080] The redundant control structure of the flow control gas path forms a controlled redundant discharge gas path, so that the gas supply gas path can ensure the reliable triggering of the on-off time of the downstream pipeline and the discharge pipeline when a control fault occurs, ensure the effective regulation of the gas pressure and flow resistance in the discharge pipeline, and ensure the safety of the gas use project and the gas pipeline.

[0081] The flow control method formed by the redundant control structure of the flow control gas path of the above embodiment is as shown in Figure 2 Figure 2 The embodiment includes the following steps.

[0082] Step 100: Initialize the automatic gas supply process, control the first main control electromagnetic valve QA_X and the second main control electromagnetic valve QB_X to open the first redundant gas supply gas path and the second redundant gas supply gas path according to the flow demand, and supply gas. During the gas supply process, the first throttle element XA_X, the second throttle element XB_X, and the third throttle element X_X are controlled according to the pressure data fed back by the pressure sensor BP_X to adjust the pressure of the corresponding gas path.

[0083] The on-off control of the redundant gas supply gas path is formed by using the main control electromagnetic valve, the flow resistance control of each section of the gas path is formed by using the throttle element, and the pressure-flow resistance feedback control process is established by using the feedback pressure data of the pressure sensor.

[0084] Step 200: Control the first main control electromagnetic valve QA_X and the second main control electromagnetic valve QB_X to close the first redundant gas supply gas path and the second redundant gas supply gas path according to the flow demand, and stop the gas supply. During the stopping process, the pressure data fed back by the pressure sensor BP_X is used to judge the gas supply stopping state.

[0085] The complete process of starting gas supply and stopping gas supply is monitored according to the pressure-flow resistance feedback control process, the pressure state monitoring of the entire flow control gas path is formed, and the automatic control basis of the program-controlled one-key type gas cylinder charging and discharging working process is formed.

[0086] ​The flow control method of this invention utilizes a redundant control structure to form an automated inflation feedback control mechanism for inflation projects. This effectively improves the control accuracy of pressure and flow during inflation, reduces manual intervention, and enhances air supply efficiency and adaptability.

[0087] like Figure 2 As shown, in one embodiment of the present invention, step 100 further includes:

[0088] Step 110: During the gas supply process using a single redundant gas supply circuit, when the pressure status fed back by the pressure sensor BP_X continues to drop or falls below the threshold, control the other redundant gas supply circuit to open and perform redundant gas supply.

[0089] Step 120: Adjust the pressure of each pipeline by controlling the first throttling element XA_X, the second throttling element XB_X, and the third throttling element X_X in stages.

[0090] The flow control method of this invention utilizes a redundant control structure to form an automated redundant air path control mechanism for inflation projects. It can also address the issue of main control solenoid valves QA_X and QB_X failing to open when energized. This effectively ensures stable control of pressure and flow during inflation, improving air supply stability and safety.

[0091] like Figure 2 As shown, in one embodiment of the present invention, step 200 further includes:

[0092] Step 210: During the gas supply shutdown process, when the pressure status fed back by the pressure sensor BP_X continues to rise or exceeds the threshold, the exhaust solenoid valve F_X and the exhaust throttling element XF_X are controlled in a coordinated manner to connect the redundant exhaust pipeline and adjust the gas pressure of the redundant exhaust pipeline.

[0093] The control solenoid valve F_X connects to the redundant discharge pipeline, and the discharge throttling element XF_X is adjusted according to the air pressure and flow rate of the upstream pipeline to control the stability of the air pressure and flow rate in the redundant discharge pipeline. This embodiment of the flow control method utilizes a redundant control structure to form an automated venting control mechanism for the inflation project, and can also address the failure of the main control solenoid valves QA_X and QB_X to close properly when de-energized. It effectively ensures redundant closure during the inflation process and stable control of pressure and flow rate during the venting process, improving the stability and safety of the air supply.

[0094] An embodiment of the present invention provides a flow control device, comprising:

[0095] A memory is used to store program code during the control process of the flow control method in the above embodiments;

[0096] The processor is used to execute program code during the flow control process of the above-described embodiments.

[0097] The processor can be a DSP (Digital Signal Processor), a FPGA (Field-Programmable Gate Array), a MCU (Microcontroller Unit), a SoC (system on a chip), or a PLC (Programmable Logic Controller) including I / O.

[0098] An embodiment of the flow control device is shown in Figure 3 In Figure 3 this embodiment, the embodiment includes:

[0099] The inflation start control module 10 is used for automatic gas supply process initialization, and controls the first main control electromagnetic valve QA_X and the second main control electromagnetic valve QB_X to open the first redundant gas supply gas path and the second redundant gas supply gas path for gas supply according to the flow demand. In the gas supply process, the first throttle element XA_X, the second throttle element XB_X, and the third throttle element X_X are controlled to adjust the corresponding gas path pressure according to the pressure data fed back by the pressure sensor BP_X.

[0100] The inflation stop control module 20 is used for controlling the first main control electromagnetic valve QA_X and the second main control electromagnetic valve QB_X to stop gas supply by closing the first redundant gas supply gas path and the second redundant gas supply gas path according to the flow demand. In the stop process, the pressure data fed back by the pressure sensor BP_X is used to determine the gas supply stop state.

[0101] As shown in Figure 3 In an embodiment of the present application, the inflation start control module 10 includes:

[0102] The gas path redundancy control unit 11 is used for controlling the other redundant gas supply gas path to be opened for redundant gas supply when the pressure state fed back by the pressure sensor BP_X continuously decreases or is less than a threshold value during the single-path redundant gas supply gas path gas supply process.

[0103] The gas path parameter adjustment unit 12 is used for controlling the first throttle element XA_X, the second throttle element XB_X, and the third throttle element X_X to adjust the pipeline pressure in stages.

[0104] As shown in Figure 3 In an embodiment of the present application, the inflation stop control module 20 includes:

[0105] The deflation redundancy control unit 21, during the air supply stop process, when the pressure state fed back by the pressure sensor BP_X continuously rises or is higher than a threshold value, performs cooperative control of the exhaust solenoid valve F_X and the exhaust throttle element XF_X, turns on the redundancy exhaust pipeline, and adjusts the air pressure of the redundancy exhaust pipeline.

[0106] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A redundant control structure for a flow control gas path, comprising: The first and second basic pipelines, connected in series, are used to form a gas supply path between the gas source interface on the first basic pipeline side and the gas supply interface on the second basic pipeline side. Manual throttle valve is used to manually adjust the opening of the throttle valve to form the on / off control of the first basic pipeline and the control of gas flow. A pressure sensor is used to collect the pressure status of the downstream pipeline of the control gas circuit on the second base pipeline; Its characteristic is that it further includes: The first redundant pipeline is used to form a first redundant gas supply pipeline connected in parallel with the first basic pipeline. The first main control solenoid valve is used to control the connection and disconnection of the first redundant gas supply circuit. The first throttling element is used to controllably adjust the flow resistance of the first redundant gas supply path; The second redundant pipeline is used to form a second redundant gas supply pipeline connected in parallel with the first basic pipeline. The second main control solenoid valve is used to control the connection and disconnection of the second redundant gas supply circuit. The second throttling element is used to control the flow resistance of the second redundant gas supply path.

2. The redundant control structure as described in claim 1, characterized in that, Also includes: The third throttling element is used to control the flow resistance of the second base pipe.

3. The redundant control structure as described in claim 1, characterized in that, Also includes: The third basic pipeline is used to connect with the second basic pipeline to form a venting gas path between the gas source interface P on the first basic pipeline side and the venting interface R on the third basic pipeline side via the second basic pipeline. Manual shut-off valve, used for manual control of the opening and closing of the third basic pipeline; A redundant discharge pipeline is used to connect the third base pipeline in parallel on the second base pipeline to form a redundant venting gas path. The solenoid valve is used to control the opening and closing of the redundant venting gas path. Emission throttling element, used to control the flow resistance of redundant venting gas paths.

4. The redundant control structure as described in claim 1, characterized in that, Also includes: The shut-off solenoid valve is used to control the on / off state of the second basic pipeline 2.

5. A flow control method, utilizing the redundant control structure as described in any one of claims 1 to 5, characterized in that, include: The automatic gas supply process is initialized. According to the flow demand, the first main control solenoid valve and the second main control solenoid valve are controlled to open the first redundant gas supply path and the second redundant gas supply path as needed to supply gas. During the gas supply process, the first throttling element, the second throttling element, and the third throttling element are controlled to adjust the pressure of the corresponding gas path according to the pressure data fed back by the pressure sensor. Based on flow demand, the first main control solenoid valve and the second main control solenoid valve are controlled to close the first redundant air supply circuit and stop the second redundant air supply circuit from supplying air as needed. During the shutdown process, the air supply stop status is determined based on the pressure data fed back by the pressure sensor.

6. The flow control method as described in claim 5, characterized in that, The step of controlling the first main control solenoid valve and the second main control solenoid valve to open the first redundant gas supply circuit and the second redundant gas supply circuit as needed to supply gas according to flow demand includes: During the gas supply process using a single redundant gas supply circuit, when the pressure status fed back by the pressure sensor continues to drop or falls below the threshold, the other redundant gas supply circuit is controlled to open for redundant gas supply. The pressure in each pipeline is adjusted by controlling the first, second, and third throttling elements in stages.

7. The flow control method as described in claim 5, characterized in that, The process of determining the gas supply stoppage status based on pressure data fed back by the pressure sensor during the shutdown includes: During the gas supply shutdown process, when the pressure status reported by the pressure sensor continues to rise or exceeds the threshold, the exhaust solenoid valve and exhaust throttling element are coordinated to connect the redundant exhaust pipeline and adjust the gas pressure of the redundant exhaust pipeline.

8. A flow control device, characterized in that, include: A memory for storing program code during the control process of the flow control method as described in any one of claims 5 to 7; A processor for executing the program code.

9. A flow control device, characterized in that, include: The inflation start control module is used to initialize the automatic air supply process. According to the flow demand, it controls the first main control solenoid valve and the second main control solenoid valve to open the first redundant air supply path and the second redundant air supply path as needed to supply air. During the air supply process, it controls the first throttling element, the second throttling element and the third throttling element to adjust the pressure of the corresponding air path according to the pressure data fed back by the pressure sensor. The inflation stop control module is used to control the first main control solenoid valve and the second main control solenoid valve to close the first redundant air supply circuit and stop the second redundant air supply circuit as needed according to the flow demand. During the stop process, the air supply stop status is determined based on the pressure data fed back by the pressure sensor.

10. The flow control device as described in claim 9, characterized in that, The inflation start control module includes: The gas path redundancy control unit adopts a single redundant gas supply gas path. During the gas supply process, when the pressure status fed by the pressure sensor continues to drop or is lower than the threshold, it controls the other redundant gas supply gas path to open to perform redundant gas supply. The gas path parameter adjustment unit adjusts the pressure of each pipeline by controlling the first throttling element, the second throttling element, and the third throttling element in stages. The inflation stop control module includes: During the gas supply shutdown process, when the pressure status fed back by the pressure sensor continues to rise or exceeds the threshold, the gas discharge redundant control unit performs coordinated control of the discharge solenoid valve and the discharge throttling element to connect the redundant discharge pipeline and adjust the gas pressure of the redundant discharge pipeline.

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