A rocket conventional propellant loading training system and method

Abstract

The application discloses a rocket conventional propellant filling training system and method, and relates to the related field of spaceflight equipment; the system comprises a simulation tank; liquid outlets of a plurality of storage tanks are respectively communicated with filling and discharging connectors on the simulation tank through filling pipelines; liquid inlets and liquid outlets of the plurality of storage tanks are respectively communicated with each other through reflux pipelines; a regulating and controlling device is arranged on the filling pipelines, can detect the temperature, pressure, flow, and flow rate in the filling pipelines, and regulate and control the flow and flow rate in the filling process; a gas distribution platform is connected with the simulation tank and the storage tanks, and can respectively introduce inert gas into the simulation tank and the storage tanks; and a filling control console is used for receiving detection data of the regulating and controlling device, and controlling the working processes of the regulating and controlling device and the gas distribution platform. The rocket conventional propellant filling training system and method can provide simulation filling training for post personnel and school students engaged in propellant filling in each launch site, fill the blank of teaching and training equipment, and improve the training effect and post ability.

Description

Technical Field

[0001] This invention relates to the field of aerospace equipment technology, and in particular to a rocket conventional propellant refueling training system and method. Background Technology

[0002] The rocket propellant loading system is a crucial component of a space launch site. Its primary function is to safely, accurately, and rapidly load fuel into the rocket's propellant tanks before launch. This system is complex, comprised of numerous devices, and is a multi-functional integrated system. The conventional propellants used in launch vehicles primarily consist of nitrogen tetroxide as the oxidizer and unsymmetrical dimethylhydrazine as the fuel. These propellants are highly corrosive, have low boiling points, are flammable and explosive, and are toxic and harmful. Therefore, the operational requirements for rocket propellant loading are extremely stringent, demanding highly skilled and experienced operators to ensure safety and accuracy. Consequently, extensive training and instruction for operators is necessary.

[0003] Currently, traditional training and hands-on practice for propellant loading systems have many problems. For example, the training methods are relatively outdated, mostly consisting of on-site operation demonstrations and simple simulations, which are insufficient to meet the high requirements of modern space launch personnel. Hands-on practice is also limited by factors such as venue, weather, and equipment availability, making it impossible to conduct at any time, and the lack of training equipment makes it difficult to meet the needs of a large number of trainees.

[0004] Therefore, there is an urgent need to design a technical solution that can provide simulated refueling training for on-the-job personnel and students, fill the gap in teaching and training equipment, and greatly improve training effectiveness and job skills. Summary of the Invention

[0005] The purpose of this invention is to provide a rocket conventional propellant refueling training system and method to solve the problems existing in the prior art. It can provide simulated refueling training for on-the-job personnel and students, fill the gap in teaching and training equipment, and greatly improve training effectiveness and job skills.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides a rocket conventional propellant refueling training system, comprising:

[0008] The simulated storage tank has its filling port connected to the filling / removing connector, which in turn is connected to the liquid pipeline.

[0009] The storage tanks, with their inlets and outlets connected to the filling and emptying connectors on the simulated storage tank via liquid pipelines; and the inlets and outlets of the multiple storage tanks interconnected via liquid pipelines.

[0010] The control equipment and metering instruments are installed on the liquid pipeline. The control equipment can realize the opening and closing of valves and the adjustment of the opening degree, as well as the start and stop control of pumps, thereby controlling the flow and pressure during the filling process; the metering instruments can measure and display the temperature, pressure and flow rate of the propellant in the liquid pipeline.

[0011] The gas distribution platform, connected to the pressurization ports of the simulated storage tank and the storage vessel via pressurization pipelines, allows inert gas to be introduced into the simulated storage tank and the storage vessel to regulate the pressure within them. The gas distribution platform, connected to the return gas ports of the simulated storage tank and the storage vessel via return gas pipelines, allows inert gas to circulate between the two vessels, achieving pressure balance. The gas distribution platform, connected to the liquid pipeline via a gas detection pipeline, allows inert gas to be introduced into the liquid pipeline to check its airtightness. The gas distribution platform, connected to the liquid pipeline via a venting pipeline, allows any remaining liquid propellant in the liquid pipeline to be vented into the storage vessel.

[0012] The filling console is used to send control commands of the control equipment to the PLC control cabinet, receive signals from the PLC control cabinet, and control the filling process and the working process of the gas distribution station.

[0013] The PLC control cabinet is used to receive control commands from the filling console, drive the control equipment to perform switching, start / stop, and opening adjustment actions, and receive status data from the control equipment and detection data from the metering instruments.

[0014] Preferably, the storage tank includes a first storage tank, a second storage tank, and a venting tank. The inlets of the first storage tank, the second storage tank, and the venting tank are connected by liquid pipelines. The outlets of the first storage tank, the second storage tank, and the venting tank are also connected by liquid pipelines. A pneumatic ball valve is provided on the liquid pipeline.

[0015] Preferably, the control device includes a pneumatic ball valve, a shielded pump, and an electric regulating valve installed on the gas pipeline and the liquid pipeline; the metering instruments include a flow meter, a pressure sensor, and a temperature sensor on the liquid pipeline and the gas pipeline; the flow meter is located on the liquid pipeline between the electric regulating valve and the simulated storage tank, and is used to measure the instantaneous flow rate and cumulative flow rate of the liquid flowing through the liquid pipeline; the sensors and temperature sensors are used to transmit the pressure or temperature of the liquid pipeline to the filling control console; the gas pipeline includes the pressurization pipeline, the return gas pipeline, and the venting pipeline; the liquid pipeline includes the filling pipeline and the return pipeline.

[0016] Preferably, the canned pump includes a first canned pump and a second canned pump arranged in parallel, and the electric regulating valve includes a first electrically controlled regulating valve and a second electrically controlled regulating valve arranged in parallel; the first canned pump and the first electric regulating valve are connected in series on a first filling branch pipeline, and the second canned pump and the second electric regulating valve are connected in series on a second filling branch pipeline; one end of the first filling branch pipeline and one end of the second filling branch pipeline are respectively connected to the end of the filling pipeline away from the storage tank, and the other end of the first filling branch pipeline and the other end of the second filling branch pipeline are respectively connected to the end of the filling pipeline near the storage tank; a pneumatic ball valve is provided on the first filling branch pipeline near the storage tank end of the first canned pump, and a pneumatic ball valve is provided on the first filling branch pipeline between the first canned pump and the first electric regulating valve; a pneumatic ball valve is provided on the second filling branch pipeline near the storage tank end of the second canned pump, and a pneumatic ball valve is provided on the second filling branch pipeline between the second canned pump and the second electric regulating valve.

[0017] Preferably, the storage tank is equipped with a sampler, which is used to extract liquid from the storage tank as a sample for testing.

[0018] Preferably, the sampler includes a high-level sampling valve, a mid-level sampling valve, and a low-level sampling valve, all of which are connected to the interior of the storage tank. The high-level, mid-level, and low-level sampling valves are externally connected to sampling pipelines. These sampling pipelines are connected to the storage tank via pipelines equipped with return valves. Above the sampling pipelines is a sampling chamber, which is connected to the atmosphere via a pipeline equipped with an outlet valve. Above the sampling chambers is an exhaust pipeline, which is connected to the storage tank via a pipeline equipped with a return pressure valve and is also connected to the atmosphere via a pipeline equipped with an exhaust valve.

[0019] Preferably, the filling console is equipped with control software and is connected to the PLC control cabinet via a signal line.

[0020] Preferably, the PLC control cabinet is used to install electrical components, integrating PLC, circuit breaker, contactor, and relay components into one cabinet.

[0021] Preferably, the filling control console is equipped with a display screen and an industrial computer, and the filling control console integrates automatic and manual switching buttons, control on and off switching buttons, cycle start, stop, alarm reset and emergency stop buttons.

[0022] The present invention also provides a method for rocket conventional propellant refueling training based on the above-mentioned rocket conventional propellant refueling training system, comprising the following steps:

[0023] The filling console starts the filling control software, sets the filling parameters, sets the filling volume and filling level, adjusts the opening of the regulating valve, and selects the canned pump and flow meter to be started;

[0024] The filling control console is controlled by a PLC, which issues operating commands to the pneumatic ball valve, electric regulating valve, and canned pump, and at the same time receives the operating parameters of the above equipment, such as pressure, flow rate, liquid level, and temperature.

[0025] The refueling control console dynamically adjusts the refueling process;

[0026] The filling console enables single-point control, process control, and one-click filling control.

[0027] The present invention achieves the following technical effects compared to the prior art:

[0028] This invention can realize parameter setting for propellant loading of different rockets under different operating conditions and of different models, laying the foundation for simulating different rocket loading processes; it can realize full-process practical training of rocket propellant loading for multiple people and multiple positions, improving job skills; it can realize operating condition training under various control modes, and carry out matching training for personnel with different backgrounds. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of a rocket conventional propellant loading training system in one or more embodiments of the present invention;

[0031] Figure 2 This is a schematic diagram of a sampler in a rocket conventional propellant refueling training system according to one or more embodiments of the present invention.

[0032] Explanation of reference numerals in the attached drawings: 1-Simulated storage tank, 2-First storage tank, 3-Second storage tank, 4-Vent tank, 5-Pneumatic ball valve, 6-Pressure sensor, 7-Temperature sensor, 8-Pressure booster line, 9-Return gas line, 10-Vent line, 11-Refill line, 12-Return line, 13-First shielded pump, 14-Second shielded pump, 15-First electric regulating valve, 16-Second electric regulating valve, 17-Sampler, 18-High-position sampling valve, 19-Middle-position sampling valve, 20-Low-position sampling valve, 21-Return liquid pressurization valve, 22-Exhaust valve, 23-Return liquid valve, 24-Discharge valve, 25-Gas distribution platform, 26-Heat exchanger, 27-Addition / Release connector, 28-Gas detection line. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0034] The purpose of this invention is to provide a rocket conventional propellant refueling training system and method to solve the problems existing in the prior art. It can provide simulated refueling training for on-the-job personnel and students, fill the gap in teaching and training equipment, and greatly improve training effectiveness and job skills.

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] refer to Figure 1 and Figure 2 As shown, the present invention provides a rocket conventional propellant refueling training system, including a storage pipeline for liquid fuel flowing in, with a volume of 1m³. 3 The simulated storage tank 1 has a filling port connected to a filling / return connector 27, which is connected to a liquid pipeline, including a filling pipeline 11 and a return pipeline 12. The outlets of multiple storage tanks are connected to the filling / return connector 27 on the simulated storage tank 1 via liquid pipelines. During filling, liquid fuel enters the simulated storage tank 1 through the filling / return connector 27. The filling / return connector 27 has functions such as opening the filling port and transmitting valve opening signals. The inlets and outlets of multiple storage tanks are interconnected via liquid pipelines, allowing for the connection of any two storage tanks. The system facilitates the mutual flow and transfer of liquid propellants, allowing for centralized storage of liquid propellants after refueling. Control devices and metering instruments are installed on the pipelines, enabling separate control and monitoring of the propellant temperature, pressure, and flow rate within the pipelines. The gas distribution platform 25 is connected to multiple nitrogen cylinders via gas pipelines, depressurizing the inert gas in the nitrogen cylinders and supplying it to the storage tank, pipelines, simulated storage tank 1, and refueling / venting connector 27. The gas distribution platform 25 is connected to gas pipelines, including a pressurization pipeline 8, a return gas pipeline 9, and a venting pipeline 10. For easy differentiation... Figure 1The thicker lines represent gas pipelines, and the thinner lines represent liquid pipelines. The gas distribution platform 25 is connected to the pressurization ports of the simulated storage tank 1 and the storage tank via the pressurization pipeline 8, pressurizing both. The gas distribution platform 25 is also connected to the return gas ports of the simulated storage tank 1 and the storage tank via the return gas pipeline 9, achieving pressure balance between the two. The gas distribution platform 25 can also pressurize the liquid pipeline via the gas detection pipeline 28 equipped with a one-way valve to check the airtightness of the liquid pipeline. The gas distribution platform 25 can also connect to the liquid pipeline via the venting pipeline 10 equipped with a one-way valve to discharge any remaining propellant in the liquid pipeline into the venting tank 4. The gas distribution platform 25 is connected to the venting connector 27 via the venting supply pipeline, allowing the venting connector 27 to be pushed forward to open the filling valve. Each pipeline involved in this invention is equipped with an independently controlled valve, enabling the opening or closing of each pipeline.

[0037] In one embodiment, the liquid pipeline includes a filling pipeline 11 and a return pipeline 12. The storage tanks include a first storage tank 2, a second storage tank 3, and a venting tank 4. The outlets of the first storage tank 2 and the second storage tank 3 are respectively connected to the filling pipeline 11 via filling branch pipes, and the inlets of the first storage tank 2 and the second storage tank 3 are respectively connected to the return pipeline 12 via return branch pipes. Both the return pipeline 12 and the filling pipeline 11 are equipped with pneumatic ball valves 5, which are straight-through pneumatic solenoid ball valves used to control the flow of liquid in the filling pipeline 11. The outlet of the venting tank 4 is connected to the return pipeline 12, and the inlet of the venting tank 4 is connected to both the filling pipeline 11 and the return pipeline 12. The venting tank 4 is used to collect excess or residual propellant, buffer and stabilize pressure, and perform auxiliary system venting and replacement. The storage tanks are mainly used to store the filling medium; in this embodiment, the filling medium is clean water. The storage tank is a horizontal tank with a volume of 1m³. 3 .

[0038] In one embodiment, the control equipment includes a pneumatic ball valve, a canned pump, and an electric regulating valve installed on the pipeline. The metering instruments include a flow meter, a pressure sensor 6, and a temperature sensor 7 installed on the pipeline. A heat exchange branch pipe connects the return pipeline 12 and the filling pipeline 11. A heat exchanger 26 is installed on the heat exchange branch pipe to heat the liquid in the pipeline. The temperature sensor 7 is installed on the heat exchange branch pipe to monitor the liquid temperature. The canned pump is used to deliver the filling fuel and is a horizontal single-stage single-suction centrifugal pump. The electric regulating valve is installed on the pipeline after the canned pump and can adjust the fuel flow rate during filling. The flow meter is located on the pipeline after the electric regulating valve and is a turbine flow meter, a velocity-type instrument used to measure the instantaneous flow rate and cumulative flow rate of the liquid flowing through the pipeline. The pressure sensor 6 and the temperature sensor 7 are used to transmit the pressure or temperature of the filling pipeline 11 to the filling control console. The pressure range of the pressure sensor 6 is 0-2.5 MPa, and the temperature range of the temperature sensor 7 is 0℃-100℃.

[0039] The canned motor pumps include a first canned motor pump 13 and a second canned motor pump 14 arranged in parallel. The electric regulating valves include a first electrically controlled regulating valve and a second electrically controlled regulating valve arranged in parallel. The first canned motor pump 13 and the first electrically controlled regulating valve are connected in series on a first filling branch pipeline, and the second canned motor pump 14 and the second electrically controlled regulating valve are connected in series on a second filling branch pipeline. One end of the first filling branch pipeline and one end of the second filling branch pipeline are respectively connected to the end of the filling pipeline 11 away from the storage tank, and the other ends of the first filling branch pipeline and the other ends of the second filling branch pipeline are respectively connected to the end of the filling pipeline 11 near the storage tank. A pneumatic ball valve 5 is provided on the first filling branch pipeline near the storage tank of the first canned motor pump 13, and a pneumatic ball valve 5 is provided on the first filling branch pipeline between the first canned motor pump 13 and the first electric regulating valve 15. A pneumatic ball valve 5 is provided on the second filling branch pipeline near the storage tank of the second canned motor pump 14, and a pneumatic ball valve 5 is provided on the second filling branch pipeline between the second canned motor pump 14 and the second electric regulating valve 16.

[0040] The storage tank is equipped with a sampler 17, which is used to extract liquid from the tank for testing. (See attached document) Figure 2 The sampler 17 includes a high-level sampling valve 18, a middle-level sampling valve 19, and a low-level sampling valve 20, all connected to the interior of the storage tank. The high-level sampling valve 18, the middle-level sampling valve 19, and the low-level sampling valve 20 are connected to sampling pipelines. The high-level sampling valve 18, the middle-level sampling valve 19, and the low-level sampling valve 20 are respectively connected to the upper, middle, and bottom parts of the storage tank via pipelines. The liquid is squeezed out by pressurizing the storage tank through the pressurization pipeline 8. The sampling pipeline is connected to the storage tank via a pipeline equipped with a return valve 23. Above the sampling pipeline is a sampling chamber, which is connected to the atmosphere via a pipeline equipped with an outlet valve 24. Above the sampling chamber is an exhaust pipeline, which is connected to the storage tank via a pipeline equipped with a return pressurization valve 21 and is connected to the atmosphere via a pipeline equipped with an exhaust valve 22. The function of return valve 23 is to return the liquid in the sampling chamber back to the storage tank after sampling; the function of return pressure valve 21 is to pressurize the liquid in the sampling chamber as it flows back to the storage tank, accelerating its return; the function of discharge valve 24 is to release the liquid in the sampling chamber, which can be collected in a bottle for testing; the function of vent valve 22 is to connect to the atmosphere, creating a pressure difference between the storage tank and the atmosphere, preventing the liquid from being unable to be extracted due to insufficient pressure difference, i.e., the liquid in the storage tank cannot enter the sampling chamber due to insufficient pressure difference. The sampling chamber is used to store the sampled liquid.

[0041] The refueling control console houses a PLC control cabinet for installing electrical components. The PLC, circuit breakers, contactors, relays, and other components are integrated into a single cabinet to prevent dust from entering and causing short circuits, thus extending their lifespan. This cabinet integration also protects against high-voltage electricity and facilitates convenient use. The refueling control console includes a display screen and an industrial computer, and integrates automatic / manual switching buttons, on / off control buttons, cycle start, stop, and emergency stop buttons.

[0042] This invention also provides a training method for conventional rocket propellant loading, used to simulate the entire process of loading fuel into rocket tanks before launch, including gas detection, pump filling, reflux, tank transfer, loading, venting, backflow, and temperature rise and fall training. The process includes the following steps: The refueling control console starts the refueling control software, sets the refueling parameters (by inputting relevant parameters into the existing control software, selecting relevant equipment, and clicking "OK"), and sets the refueling volume, refueling level, adjusting the regulating valve opening, and selecting the canned motor pump and flow meter to be started. The refueling control console, controlled by a PLC, issues operating commands to the pneumatic ball valve, electric regulating valve, canned motor pump, and other equipment, while simultaneously receiving operating parameters such as pressure, flow rate, liquid level, and temperature from these devices. The refueling control console can dynamically adjust the refueling speed and flow rate to achieve the entire refueling process. During the entire refueling process, all valves on the liquid pipeline are open, liquid flows from the storage tank into the liquid pipeline, the pump starts, pressurizes the liquid pipeline after the pump, and increases the flow rate. The gas distribution platform 25 supplies gas to the refueling connector 27 to open the refueling valve, allowing propellant to flow into the simulated storage tank 1. Then, the opening of the electric regulating valve is increased to increase the propellant flow rate into the simulated storage tank 1. When the flow rate is close to the refueling volume, the opening of the electric regulating valve is decreased to reduce the flow rate, gradually approaching the refueling volume. Once the refueling volume is reached, the gas distribution platform 25 stops supplying gas to the refueling / venting connector 27, the valve closes, the shielded pump stops, and the tank outlet valve closes. The gas distribution platform 25 supplies gas through the venting pipeline 10, which pushes the remaining propellant in the pipeline into the venting tank 4.

[0043] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A rocket conventional propellant refueling training system, characterized in that: include: The simulated storage tank has its filling port connected to the filling / removing connector. The storage tanks have their outlets and inlets connected to the filler / release connectors on the simulated storage tank via liquid pipelines; and the inlets and outlets of the multiple storage tanks are interconnected via liquid pipelines. The gas distribution platform, connected to the pressurization ports of the simulated storage tank and the storage vessel via pressurization pipelines, allows inert gas to be introduced into the simulated storage tank and the storage vessel to regulate the pressure within them. The gas distribution platform, connected to the return gas ports of the simulated storage tank and the storage vessel via return gas pipelines, allows inert gas to circulate between the two vessels, achieving pressure balance. The gas distribution platform, connected to the liquid pipeline via a gas detection pipeline, allows inert gas to be introduced into the liquid pipeline to check its airtightness. The gas distribution platform, connected to the liquid pipeline via a venting pipeline, allows any remaining liquid propellant in the liquid pipeline to be vented into the storage vessel. The control equipment and metering instruments are installed on the liquid pipeline. The control equipment can realize the opening and closing of various valves on the liquid pipeline and the adjustment of the opening degree, as well as the start and stop control of the pump, thereby controlling the flow rate and pressure during the filling process. Measuring instruments can measure and display the temperature, pressure, and flow rate of propellant in liquid pipelines; The filling console is used to send control commands of the control equipment to the PLC control cabinet, receive signals from the PLC control cabinet, and control the filling process and the working process of the gas distribution station. The PLC control cabinet is used to receive control commands from the filling console, drive the control equipment to perform switching, start / stop, and opening adjustment actions, and receive status data from the control equipment and detection data from the metering instruments.

2. The rocket conventional propellant refueling training system according to claim 1, characterized in that: The storage tank includes a first storage tank, a second storage tank, and a venting tank. The inlets of the first storage tank, the second storage tank, and the venting tank are connected by liquid pipelines. The outlets of the first storage tank, the second storage tank, and the venting tank are also connected by liquid pipelines. A pneumatic ball valve is provided on the liquid pipeline.

3. The rocket conventional propellant refueling training system according to claim 1, characterized in that: The control equipment includes a pneumatic ball valve, a shielded pump, and an electric regulating valve installed on the gas pipeline and the liquid pipeline. The metering instruments include a flow meter, a pressure sensor, and a temperature sensor on the liquid pipeline and the gas pipeline. The flow meter is located on the liquid pipeline between the electric regulating valve and the simulated storage tank and is used to measure the instantaneous flow rate and cumulative flow rate of the liquid flowing through the liquid pipeline. The pressure sensor and temperature sensor are used to transmit the pressure or temperature of the liquid pipeline to the filling control console. The gas pipeline includes the pressurization pipeline, the return gas pipeline, and the venting pipeline. The liquid pipeline includes the filling pipeline and the return pipeline.

4. The rocket conventional propellant refueling training system according to claim 3, characterized in that: The shielded pump includes a first shielded pump and a second shielded pump arranged in parallel. The electric regulating valve includes a first electrically controlled regulating valve and a second electrically controlled regulating valve arranged in parallel. The first shielded pump and the first electric regulating valve are connected in series on a first filling branch pipeline, and the second shielded pump and the second electric regulating valve are connected in series on a second filling branch pipeline. One end of the first filling branch pipeline and one end of the second filling branch pipeline are respectively connected to the end of the filling pipeline away from the storage tank, and the other ends of the first filling branch pipeline and the other ends of the second filling branch pipeline are respectively connected to the end of the filling pipeline near the storage tank. A pneumatic ball valve is provided on the first filling branch pipeline near the storage tank end of the first shielded pump, and a pneumatic ball valve is provided on the first filling branch pipeline between the first shielded pump and the first electric regulating valve. A pneumatic ball valve is provided on the second filling branch pipeline near the storage tank end of the second shielded pump, and a pneumatic ball valve is provided on the second filling branch pipeline between the second shielded pump and the second electric regulating valve.

5. The rocket conventional propellant refueling training system according to claim 1, characterized in that: The storage tank is equipped with a sampler, which is used to extract the liquid in the storage tank as a sample for testing.

6. The rocket conventional propellant refueling training system according to claim 5, characterized in that: The sampler includes a high-level sampling valve, a mid-level sampling valve, and a low-level sampling valve, all of which are connected to the interior of the storage tank. The high-level, mid-level, and low-level sampling valves are externally connected to sampling pipelines. These sampling pipelines are connected to the storage tank via pipelines equipped with return valves. Above the sampling pipelines is a sampling chamber, which is connected to the atmosphere via a pipeline equipped with an outlet valve. Above the sampling chamber is an exhaust pipeline, which is connected to the storage tank via a pipeline equipped with a return pressure valve. The exhaust pipeline is also connected to the atmosphere via a pipeline equipped with an exhaust valve.

7. The rocket conventional propellant refueling training system according to claim 1, characterized in that: The filling console is equipped with control software and is connected to the PLC control cabinet via signal lines.

8. The rocket conventional propellant refueling training system according to claim 7, characterized in that: The PLC control cabinet is used to install electrical components, integrating PLC, circuit breaker, contactor, and relay components into one cabinet.

9. The rocket conventional propellant refueling training system according to claim 1, characterized in that: The filling control console is equipped with a display screen and an industrial computer. It also integrates automatic and manual switching buttons, on / off control buttons, cycle start, stop, alarm reset, and emergency stop buttons.

10. A rocket conventional propellant refueling training method based on the rocket conventional propellant refueling training system according to any one of claims 1 to 9, characterized in that: Includes the following steps: The filling console starts the filling control software, sets the filling parameters, sets the filling volume and filling level, adjusts the opening of the regulating valve, and selects the canned pump and flow meter to be started; The filling control console is controlled by a PLC, which issues operating commands to the pneumatic ball valve, electric regulating valve, and canned pump, and at the same time receives the operating parameters of the above equipment, such as pressure, flow rate, liquid level, and temperature. The refueling control console dynamically adjusts the refueling process; The filling console enables single-point control, process control, and one-click filling control.

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