Rocket propellant vehicle-mounted storage and transportation system and its filling method

Abstract

The present application relates to rocket propellant storage and transportation system, specifically relates to a kind of rocket propellant vehicle-mounted storage and transportation system and its filling method, for solving the insufficient airtightness of existing rocket propellant vehicle-mounted storage and transportation system in the process of transportation, temperature control is unreliable, the temperature, pressure, liquid level and other conditions of rocket propellant cannot be monitored in real time, and the residual rocket propellant in the pipeline of vehicle-mounted storage and transportation system cannot be handled.The rocket propellant vehicle-mounted storage and transportation system includes automobile chassis, tank body, filling pipeline system and control system;The tank body of the present application has good heat preservation effect and sealing, can fully ensure the temperature and pressure of rocket propellant in tank body constant during transportation, and temperature, pressure and liquid level in tank body can be monitored in real time through first pressure gauge, liquid level meter, thermometer control system, fully ensure the stability of the physicochemical properties of rocket propellant in tank body.

Description

Technical Field

[0001] This invention relates to rocket propellant storage and transportation systems, specifically to a vehicle-mounted rocket propellant storage and transportation system and its refueling method. Background Technology

[0002] The frequency of rocket engine tests has increased dramatically, leading to a greater use of rocket propellants and higher requirements for their physicochemical properties. Rocket propellants are oxidizing, flammable, and toxic; they can spontaneously combust upon contact with amines, hydrazine, and furfuryl alcohol; they are easily ignited upon contact with carbon, sulfur, and phosphorus; and they can explode when mixed with the vapors of many organic compounds. Therefore, specialized storage and transportation systems are required for their transport.

[0003] Existing vehicle-mounted rocket propellant storage and transportation systems have the following problems during transportation:

[0004] (1) Insufficient air tightness will cause the rocket propellant to absorb moisture from the air, which will not only increase the water content in the rocket propellant, but also accelerate the corrosion of the on-board storage and transportation system, thereby affecting the performance of the rocket propellant.

[0005] (2) Unreliable temperature control can lead to changes in the properties of rocket propellants due to temperature variations;

[0006] (3) It is impossible to monitor the temperature, pressure, liquid level and other conditions of rocket propellant in real time;

[0007] (4) Unable to handle residual rocket propellant in the pipeline of the vehicle-mounted storage and transportation system. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of existing vehicle-mounted rocket propellant storage and transportation systems, such as insufficient airtightness during transportation, unreliable temperature control, inability to monitor the temperature, pressure, and liquid level of rocket propellants in real time, and inability to handle residual rocket propellant in the pipelines of the vehicle-mounted storage and transportation system. The invention provides a vehicle-mounted rocket propellant storage and transportation system and its refueling method.

[0009] To address the shortcomings of the existing technology, the present invention provides the following technical solution:

[0010] A rocket propellant vehicle-mounted storage and transportation system, characterized in that it includes a vehicle chassis, and a tank, a refueling pipeline system, a gas distribution system and a control system mounted on the vehicle chassis;

[0011] The tank is mounted on a vehicle chassis via a saddle-type support. A manhole module, a sampling module, and an interface module are located on the top of the tank. An insulation layer is provided on the outer surface of the tank, and a liquid accumulation tank is located on the bottom of the tank's interior. The manhole module includes a manhole cover, a safety valve interface on the manhole cover, and a venting device. The sampling module includes an upper sampling port, a middle sampling port, and a lower sampling port, used for sampling from the upper, middle, and bottom of the tank, respectively.

[0012] The interface module includes a first interface, a second interface, a third interface, a liquid inlet / outlet, a gas inlet / outlet, and a sewage outlet; the first interface and the second interface are respectively equipped with a first pressure gauge and a level gauge, and the control system is connected to the first pressure gauge and the level gauge respectively, and the control system is used to display the readings of the first pressure gauge and the level gauge; the third interface is connected to a thermometer;

[0013] The refueling pipeline system includes a liquid phase pipeline, a gas phase pipeline, and a drain pipeline. One end of the gas phase pipeline is connected to the inlet and outlet gas ports via a gas emergency shut-off valve, and the other end is connected to a gas phase connector and a gas nitrogen connector. The gas phase connector is used to discharge gas from the tank, and the gas nitrogen connector is used to fill the tank with nitrogen. A gas shut-off valve is installed on the gas phase pipeline. One end of the liquid phase pipeline is connected to the inlet and outlet liquid ports via a liquid emergency shut-off valve, and the other end is connected to a liquid phase connector and a liquid nitrogen connector. The liquid phase connector is used to inject rocket propellant into the tank or discharge rocket propellant from the tank, and the liquid nitrogen connector is used to purge and clean the liquid phase pipeline with nitrogen. A liquid shut-off valve is installed on the liquid phase pipeline.

[0014] Both the gas circuit emergency shut-off valve and the liquid circuit emergency shut-off valve are equipped with fusible plugs, and both the gas circuit emergency shut-off valve and the liquid circuit emergency shut-off valve are connected to the control system.

[0015] The inlet of the sewage pipe is connected to the sewage outlet through the first sewage valve. The sewage outlet is connected to the sewage pipe inside the tank. The inlet of the sewage pipe is located in the liquid accumulation tank. The outlet of the sewage pipe is connected to the sewage outlet. The sewage pipe is equipped with a second sewage valve.

[0016] The gas distribution system includes a compressed air tank, an air filter, a pressure gauge interface, and multiple gas distribution interfaces connected in sequence; the pressure gauge interface is equipped with a second pressure gauge; the multiple gas distribution interfaces are respectively connected to a gas emergency shut-off valve, a gas shut-off valve, a liquid emergency shut-off valve, and a liquid shut-off valve.

[0017] Furthermore, the gas phase pipeline includes a main gas phase pipeline and at least one gas phase branch pipeline. Each gas phase branch pipeline includes a first gas line and a second gas line. One end of the main gas phase pipeline is connected to the inlet and outlet gas ports through a gas line emergency shut-off valve, and the other end is connected to one end of each first gas line. The other end of the first gas line is provided with the gas phase connector. A gas line shut-off valve and a first gas line connection port are sequentially arranged on the first gas line along the direction close to the gas phase connector. The first gas line connection port is connected to one end of the second gas line. The other end of the second gas line is provided with the gas line nitrogen connector. A gas line nitrogen shut-off valve and a second gas line connection port are sequentially arranged on the second gas line along the direction close to the gas line nitrogen connector.

[0018] Furthermore, the gas phase pipeline includes multiple gas phase branches, and the second gas path connection ports of two adjacent gas phase branches are interconnected through pipelines.

[0019] Furthermore, the liquid phase pipeline includes a main liquid phase pipeline and at least one liquid phase branch pipeline. Each liquid phase branch pipeline includes a first liquid line and a second liquid line. One end of the main liquid phase pipeline is connected to the inlet and outlet via a liquid line emergency shut-off valve. The other end of the main liquid phase pipeline is connected to one end of each first liquid line. The other end of the first liquid line is provided with the liquid phase connector. A liquid line shut-off valve and a first liquid line connection port are sequentially arranged along the direction close to the liquid phase connector on the first liquid line. The first liquid line connection port is connected to one end of the second liquid line. The other end of the second liquid line is provided with the liquid line nitrogen connector. A liquid line nitrogen shut-off valve and a second liquid line connection port are sequentially arranged along the direction close to the liquid phase connector on the second liquid line.

[0020] Furthermore, the liquid phase pipeline includes multiple liquid phase branches, and the second liquid path connection ports of two adjacent liquid phase branches are interconnected through pipelines.

[0021] Furthermore, the sewage pipeline includes a main sewage pipeline and at least one branch sewage pipeline. The input end of the main sewage pipeline is connected to the sewage outlet through a first sewage valve, and the output end of the main sewage pipeline is connected to the input end of the branch sewage pipeline. The branch sewage pipeline is provided with a second sewage valve and a sewage outlet in sequence along the output direction.

[0022] Furthermore, a first sensor and a first solenoid valve are sequentially arranged between the gas emergency shut-off valve and the corresponding gas distribution interface, and a second sensor and a second solenoid valve are sequentially arranged between the liquid emergency shut-off valve and the corresponding gas distribution interface.

[0023] Furthermore, the vehicle chassis has a driver's cab at the front, a tank body in the middle via a saddle-type support, and a refueling pipeline system, gas distribution system, and control system at the rear. Dry powder fire extinguishers are installed on both sides of the tank body, and a grounding strip is installed at the rear of the vehicle chassis to prevent safety accidents caused by static sparks.

[0024] Furthermore, the first pressure gauge, the level gauge, and the second pressure gauge are controlled by the first pressure gauge valve, the level gauge valve, and the second pressure gauge valve, respectively.

[0025] Meanwhile, the present invention also provides a method for refueling the above-mentioned rocket propellant vehicle-mounted storage and transportation system, comprising the following steps:

[0026] Step 1: Before the first filling, replace the air in the tank with nitrogen;

[0027] Step 1.1: Confirm that all valves are closed and that the airtightness test is passed before proceeding to Step 1.2;

[0028] Step 1.2: Turn on the control system, then open the compressed air tank;

[0029] Step 1.3: Open the gas shut-off valve and nitrogen connector of the gas phase pipeline, and connect the nitrogen connector to the nitrogen source;

[0030] Step 1.4: Open the emergency shut-off valve for the gas line, turn on the nitrogen source, and fill the tank with nitrogen;

[0031] Step 1.5: When the reading of the first pressure gauge reaches the preset value, stop the nitrogen filling and close the gas circuit shut-off valve;

[0032] Step 1.6: Determine if the number of nitrogen filling cycles has reached the preset value. If yes, proceed to step 1.7. Otherwise, open the gas circuit shut-off valve and the gas phase connector to allow the nitrogen in the tank to be discharged through the gas phase connector. Observe the reading of the first pressure gauge. When the reading of the first pressure gauge reaches 0, close the gas phase connector, then open the gas circuit nitrogen connector to fill the tank with nitrogen, and return to step 1.5.

[0033] Step 1.7: Open the gas circuit shut-off valve and the gas phase connector to allow the nitrogen in the tank to be discharged through the gas phase connector, and observe the reading of the first pressure gauge. When the reading of the first pressure gauge reaches the preset value, close the gas phase connector and then close all the valves.

[0034] Step 2: Preparations before rocket propellant loading;

[0035] Step 2.1: Open the liquid phase connector and the gas phase connector, and connect the liquid phase connector to the rocket propellant storage tank and the gas phase connector to the exhaust gas treatment device respectively. The exhaust gas treatment device should be in the closed state.

[0036] Step 2.2: Open the gas circuit shut-off valve and the liquid circuit shut-off valve to reduce the pressure in the liquid phase pipeline and the gas phase pipeline;

[0037] Step 3: Rocket propellant loading;

[0038] Step 3.1: Open the compressed air tank and make the reading of the second pressure gauge greater than or equal to 0.4 MPa;

[0039] Step 3.2: Open the gas emergency shut-off valve, then open the liquid emergency shut-off valve and the gas nitrogen connector, connect the gas nitrogen connector to the nitrogen source, turn on the nitrogen source, and pressurize the tank with nitrogen so that the reading of the first pressure gauge is not less than 0.2MPa.

[0040] Step 3.3: Begin adding rocket propellant into the rocket propellant storage tank;

[0041] Step 4: Shut down rocket propellant loading;

[0042] Step 4.1: When the rocket propellant loading reaches the preset loading amount, stop the rocket propellant loading;

[0043] Step 4.2: Close the emergency shut-off valve of the liquid circuit and the nitrogen source, then open the exhaust gas treatment device to depressurize the tank;

[0044] Step 4.3: When the reading of the first pressure gauge is between 0.02MPa and 0.05MPa, close the gas circuit shut-off valve 35.

[0045] Step 4.4: Close all valves and control systems to complete the refueling of the rocket propellant vehicle-mounted storage and transportation system.

[0046] Compared with the prior art, the beneficial effects of the present invention are:

[0047] (1) The present invention provides a vehicle-mounted storage and transportation system for rocket propellants, including a vehicle chassis, a tank, a refueling pipeline system and a control system; the tank of the present invention has good heat preservation effect and sealing performance, which can fully ensure the constant temperature and pressure of the rocket propellant in the tank during transportation, and the temperature, pressure and liquid level in the tank can be monitored in real time through a first pressure gauge, a liquid level gauge and a thermometer control system, which fully ensures the stability of the physical and chemical properties of the rocket propellant in the tank.

[0048] (2) In the rocket propellant vehicle-mounted storage and transportation system of the present invention, the gas distribution system can provide the pressure during rocket propellant refueling and control the refueling speed by adjusting the air pressure. In addition, it can prevent impurities in the air from entering the rocket propellant and avoid engine blockage due to contamination of the rocket propellant.

[0049] (3) In the rocket propellant vehicle-mounted storage and transportation system of the present invention, a liquid phase pipeline, a gas phase pipeline and a sewage discharge pipeline are provided; wherein the liquid phase connector in the liquid phase pipeline is used to inject rocket propellant into the tank and discharge rocket propellant from the tank, and the liquid nitrogen connector is used to purge and clean the liquid phase pipeline with nitrogen; the gas phase connector in the gas phase pipeline is used to discharge gas from the tank, and the gas nitrogen connector is used to fill the tank with nitrogen; the sewage discharge pipeline is used to discharge residual rocket propellant in the liquid accumulation tank in the tank.

[0050] (4) The present invention provides a rocket propellant vehicle-mounted storage and transportation system. In the event of an accidental fire or excessively high temperature in the refueling pipeline, the gas circuit emergency shut-off valve and the liquid circuit emergency shut-off valve can be automatically closed by an easy-to-melt plug. Secondly, the gas circuit emergency shut-off valve 4 and the liquid circuit emergency shut-off valve can be closed by the control system, thereby effectively ensuring the safety of propellant transportation.

[0051] (5) The present invention provides a method for refueling a rocket propellant vehicle-mounted storage and transportation system. Before the first refueling, the air in the tank is replaced with nitrogen, which can prevent the rocket propellant from coming into contact with air during storage and transportation, ensuring the stability and safety of the propellant. It also effectively improves the sealing performance of gas and liquid pipelines and connectors. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the structure of a vehicle chassis in an embodiment of a rocket propellant vehicle-mounted storage and transportation system according to the present invention;

[0053] Figure 2 This is a schematic diagram of the structure of the tank, filling pipeline system, and gas distribution system in an embodiment of the present invention;

[0054] Figure 3 This is a schematic diagram of the gas phase pipeline in an embodiment of the present invention;

[0055] Figure 4 This is a schematic diagram of the liquid phase pipeline in an embodiment of the present invention.

[0056] The annotations in the attached figures are explained as follows:

[0057] 1-Car chassis, 11-Cab, 12-Ground contact strip;

[0058] 2-Tank body, 21-Manhole module, 22-Sampling module, 231-First interface, 232-Second interface, 233-Third interface, 234-Air inlet / outlet, 235-Liquid inlet / outlet, 236-Drainage interface, 237-Liquid collection tank;

[0059] 3-Gas phase pipeline, 31-Gas phase main pipeline, 32-First gas line, 33-Second gas line, 34-Gas line emergency shut-off valve, 35-Gas line shut-off valve, 36-Gas phase connector, 37-Gas line nitrogen shut-off valve, 38-Second gas line connection port, 39-Gas line nitrogen connector.

[0060] 4-Liquid phase pipeline, 41-Liquid phase main pipeline, 42-First liquid line, 43-Second liquid line, 44-Liquid line emergency shut-off valve, 45-Liquid line shut-off valve, 46-Liquid phase connector, 47-Liquid line nitrogen shut-off valve, 48-Second liquid line connection port, 49-Liquid line nitrogen connector;

[0061] 5-Sewage discharge pipeline, 51-First sewage discharge valve, 52-Second sewage discharge valve, 53-Sewage discharge outlet;

[0062] 61-First pressure gauge valve, 62-Second pressure gauge valve, 63-Level gauge valve, 64-First solenoid valve, 65-Second solenoid valve;

[0063] 71-First pressure gauge, 72-Level gauge, 73-Thermometer, 74-Second pressure gauge, 75-First sensor, 76-Second sensor;

[0064] 8-Air distribution system, 81-Compressed air tank, 82-Air filter;

[0065] 9-Control system. Detailed Implementation

[0066] The present invention will be further described below with reference to the accompanying drawings and exemplary embodiments.

[0067] A rocket propellant vehicle-mounted storage and transportation system includes a vehicle chassis 1, a tank 2, a saddle-type support, a refueling pipeline system, a gas distribution system 8, and a control system 9.

[0068] Reference Figure 1 The vehicle chassis 1 has a driver's cab 11 at the front, a tank body 2 in the middle via a saddle-type support, and a refueling pipeline system, a gas distribution system 8, and a control system 9 at the rear. Dry powder fire extinguishers are installed on both sides of the tank body 2, and a grounding strip 12 is installed at the rear of the vehicle chassis 1 to prevent safety accidents caused by static sparks.

[0069] Reference Figure 2 The top of the tank 2 is provided with a manhole module 21, a sampling module 22 and an interface module. The tank 2 is provided with an insulation layer made of foamed glass fiber. The bottom of the tank 2 is provided with a liquid accumulation tank 237.

[0070] The manhole module 21 includes a manhole cover, a safety valve interface mounted on the manhole cover, and a relief device. The relief device includes a built-in spring safety valve and a rupture disc relief device connected in series to prevent safety accidents that may be caused by overpressure. The built-in spring safety valve has a set pressure of 0.77 MPa and a reseating pressure of 0.7 MPa, and the rupture disc has a burst pressure of 0.84 MPa.

[0071] The sampling module 22 includes an upper sampling port, a middle sampling port, and a lower sampling port, which are used to take samples from the upper, middle, and bottom parts of the tank 2, respectively. The upper sampling port is connected to an upper sampling tube through a sampling valve, the middle sampling port is connected to a middle sampling tube through a sampling valve, and the lower sampling port is connected to a lower sampling tube through a sampling valve. The sampling ends of the upper, middle, and lower sampling tubes are located in the upper, middle, and lower parts of the tank 2, respectively.

[0072] The interface module includes a first interface 231, a second interface 232, a third interface 233, a liquid inlet / outlet 235, an air inlet / outlet 234, and a sewage outlet 236.

[0073] The first interface 231 and the second interface 232 are respectively equipped with a first pressure gauge 71 and a level gauge 72. The control system 9 is connected to the first pressure gauge 71 and the level gauge 72, respectively. The control system 9 is used to display the readings of the first pressure gauge 71 and the level gauge 72, thereby observing the liquid level and pressure in the tank 2 in real time. The first pressure gauge 71 and the level gauge 72 are controlled by the first pressure gauge valve 61 and the level gauge valve 63, respectively. The first pressure gauge 71 has a measuring range of 0 to 1.0 MPa and an accuracy of 1.6 class.

[0074] The third interface 233 is connected to a thermometer 73, which has a measurement range of -40 to 60℃.

[0075] The filling pipeline system includes liquid phase pipeline 4, gas phase pipeline 3 and sewage discharge pipeline 5.

[0076] Reference Figure 3 The gas phase pipeline 3 includes a main gas phase pipeline 31 and two gas phase branch pipelines symmetrically arranged on both sides of the vehicle chassis 1. Each gas phase branch pipeline includes a first gas line 32 and a second gas line 33. One end of the main gas phase pipeline 31 is connected to the inlet / outlet gas port 234 through a gas line emergency shut-off valve 34. The other end of the main gas phase pipeline 31 is connected to one end of each first gas line 32. A gas line shut-off valve 35, a first gas line connection port, and a gas phase connector 36 are sequentially arranged on the first gas line 32. One end of the second gas line 33 is connected to the first gas line connection port. A gas line nitrogen shut-off valve 37, a second gas line connection port 38, and a gas line nitrogen connector 39 are sequentially arranged on the second gas line 33. The two second gas line connection ports 38 are connected to each other through pipelines.

[0077] Reference Figure 4 The liquid phase pipeline 4 includes a main liquid phase pipeline 41 and two liquid phase branch pipelines symmetrically arranged on both sides of the vehicle chassis 1. Each liquid phase branch pipeline includes a first liquid line 42 and a second liquid line 43. One end of the main liquid phase pipeline 41 is connected to the inlet / outlet port 235 through a liquid line emergency shut-off valve 44. The other end of the main liquid phase pipeline 41 is connected to one end of each first liquid line 42. A liquid line shut-off valve 45, a first liquid line connection port, and a liquid phase connector 46 are sequentially arranged on the first liquid line 42. One end of the second liquid line 43 is connected to the first liquid line connection port. A liquid line nitrogen shut-off valve 47, a second liquid line connection port 48, and a liquid line nitrogen connector 49 are sequentially arranged on the second liquid line 43. The two second liquid line connection ports 48 are interconnected through pipelines.

[0078] Reference Figure 2The sewage pipeline 5 includes a main sewage pipeline and two symmetrically arranged sewage branch pipelines on both sides of the vehicle chassis 1. The input end of the main sewage pipeline is connected to the sewage interface 236 through the first sewage valve 51. The sewage interface 236 is connected to the sewage pipe inside the tank 2. The input end of the sewage pipe is located in the liquid accumulation tank 237. The output end of the main sewage pipeline is connected to the input end of the sewage branch pipeline. The sewage branch pipeline is provided with a second sewage valve 52 and a sewage outlet 53 in sequence.

[0079] Reference Figure 2 The air distribution system 8 includes a compressed air tank 81, an air filter 82, a pressure gauge interface, and six air distribution interfaces connected in sequence to the input and output. The pressure gauge interface is connected in sequence to a second pressure gauge valve 62 and a second pressure gauge 74.

[0080] The six gas distribution ports are respectively connected to the gas emergency shut-off valve 34, two gas shut-off valves 35, the liquid emergency shut-off valve 44, and two liquid shut-off valves 45.

[0081] A first sensor 75 and a first solenoid valve 64 are sequentially installed between the gas emergency shut-off valve 34 and its corresponding gas distribution port; a second sensor 76 and a second solenoid valve 65 are sequentially installed between the liquid emergency shut-off valve 44 and its corresponding gas distribution port. Both the gas emergency shut-off valve 34 and the liquid emergency shut-off valve 44 are connected to the control system 9. Figure 2 (Not shown in the image).

[0082] The function of the gas circuit emergency shut-off valve 34 and the liquid circuit emergency shut-off valve 44 is to quickly cut off the gas and liquid flow in emergency situations to prevent leakage. Both valves are equipped with fusible plugs that melt at 70±5℃, automatically closing them. Normally, these valves are closed, providing a seal and preventing leakage of the medium inside tank 2. In case of malfunction and inability of the operator to access the control system 9 to close the corresponding valves, the emergency stop button on the control system 9 can be used to close the gas circuit emergency shut-off valve 34 and the liquid circuit emergency shut-off valve 44.

[0083] A method for refueling the above-mentioned rocket propellant vehicle-mounted storage and transportation system includes the following steps:

[0084] Step 1: Before the first filling, replace the air in tank 2 with nitrogen;

[0085] Step 1.1: Confirm that all valves are closed and that the airtightness test is passed before proceeding to Step 1.2;

[0086] Step 1.2: Turn on the control system 9, and then open the first pressure gauge valve 61, the compressed air tank 81, and the second pressure gauge valve 62;

[0087] Step 1.3: For the gas phase branch on one side of the vehicle chassis 1, open the gas circuit shut-off valve 35 and the gas circuit nitrogen connector 39, connect the gas circuit nitrogen connector 39 to the nitrogen gas source, and then open the gas circuit nitrogen shut-off valve 37.

[0088] Step 1.4: Open the emergency shut-off valve 34 of the gas circuit, turn on the nitrogen source, and fill the tank 2 with nitrogen;

[0089] Step 1.5: When the reading of the first pressure gauge 71 reaches the preset value (≤0.63MPa), stop the nitrogen filling and close the gas circuit shut-off valve 35;

[0090] Step 1.6: Determine if the nitrogen filling count has reached the preset value of four times. If yes, proceed to step 1.7. Otherwise, open the gas circuit shut-off valve 35 and gas phase connector 36 in step 1.3 to allow the nitrogen in tank 2 to be discharged through the gas phase connector 36. Observe the reading of the first pressure gauge 71. When the reading of the first pressure gauge 71 reaches 0, close the gas phase connector 36, open the gas circuit nitrogen connector 39, fill the tank 2 with nitrogen, and return to step 1.5.

[0091] Step 1.7: Open the gas shut-off valve 35 and gas phase connector 36 in Step 1.3 to allow the nitrogen in tank 2 to be discharged through the gas phase connector 36. Observe the reading of the first pressure gauge 71. When the reading of the first pressure gauge 71 reaches the preset value of 0.05MPa, close the gas phase connector 36 to complete the nitrogen replacement and close all valves.

[0092] Step 2: Preparations before rocket propellant loading;

[0093] Step 2.1: Open the liquid phase connector 46 and gas phase connector 36 on the same side, and connect the liquid phase connector 46 to the rocket propellant storage tank and the gas phase connector 36 to the exhaust gas treatment device respectively. The exhaust gas treatment device is in the closed state.

[0094] Step 2.2: Open the gas shut-off valve 35 and liquid shut-off valve 45 on the same side as in Step 2.1 to reduce the pressure in the liquid phase pipeline and the gas phase pipeline.

[0095] Step 3: Rocket propellant loading;

[0096] Step 3.1: Open the compressed air tank 81 and the second pressure gauge valve 62, so that the reading of the second pressure gauge 74 is ≥0.4MPa, and then open the first pressure gauge valve 61.

[0097] Step 3.2: Open the gas emergency shut-off valve 34, then open the liquid emergency shut-off valve 44. Connect the gas nitrogen connector 39 on the same side as in Step 2.1 to the nitrogen source, turn on the nitrogen source, and pressurize the tank 2 with nitrogen so that the pressure value of the first pressure gauge 71 is not less than 0.2MPa.

[0098] Step 3.3: Begin adding rocket propellant into the rocket propellant storage tank;

[0099] Step 4: Shut down rocket propellant loading;

[0100] Step 4.1: When the rocket propellant loading reaches the preset loading amount, stop the rocket propellant loading;

[0101] Step 4.2: Close the emergency shut-off valve 44 of the liquid circuit, shut off the nitrogen source, close the nitrogen shut-off valve 37 of the gas circuit, open the waste gas treatment device, and depressurize the tank.

[0102] Step 4.3: When the reading of the first pressure gauge 71 is between 0.02MPa and 0.05MPa, close the gas circuit shut-off valve 35;

[0103] Step 4.4: Close all valves and control system 9 to complete the refueling of the rocket propellant vehicle-mounted storage and transportation system.

Claims

1. A vehicle-mounted storage and transportation system for rocket propellants, characterized in that: It includes a car chassis (1), and a tank (2), a filling pipeline system, a gas distribution system (8), and a control system (9) mounted on the car chassis (1); The tank (2) is mounted on the vehicle chassis (1) via a saddle-type support. The top of the tank (2) is provided with a manhole module (21), a sampling module (22) and an interface module. The outer surface of the tank (2) is provided with a heat insulation layer, and the bottom surface of the tank (2) is provided with a liquid accumulation tank (237). The manhole module (21) includes a manhole cover, a safety valve interface and a discharge device provided on the manhole cover. The sampling module (22) includes an upper sampling port, a middle sampling port and a lower sampling port, which are used to take samples from the upper, middle and bottom parts of the tank (2) respectively. The interface module includes a first interface (231), a second interface (232), a third interface (233), a liquid inlet / outlet (235), a gas inlet / outlet (234), and a sewage outlet (236); the first interface (231) and the second interface (232) are respectively equipped with a first pressure gauge (71) and a level gauge (72), and the control system (9) is connected to the first pressure gauge (71) and the level gauge (72) respectively, and the control system (9) is used to display the readings of the first pressure gauge (71) and the level gauge (72); the third interface (233) is connected to a thermometer (73); The filling pipeline system includes a liquid phase pipeline (4), a gas phase pipeline (3) and a sewage discharge pipeline (5); one end of the gas phase pipeline (3) is connected to the inlet and outlet gas ports (234) through a gas emergency shut-off valve (34), and the other end is connected to a gas phase connector (36) and a gas line nitrogen connector (39). The gas phase connector (36) is used to discharge the gas in the tank (2), and the gas line nitrogen connector (39) is used to fill the tank (2) with nitrogen. A gas line shut-off valve (35) is installed on the gas phase pipeline (3); One end of the liquid phase pipeline (4) is connected to the inlet and outlet (235) through the liquid emergency shut-off valve (44). The other end of the liquid phase pipeline (4) is connected to the liquid phase connector (46) and the liquid nitrogen connector (49). The liquid phase connector (46) is used to inject rocket propellant into the tank (2) or to discharge rocket propellant from the tank (2). The liquid nitrogen connector (49) is used to purge and clean the liquid phase pipeline (4) with nitrogen. The liquid phase pipeline (4) is equipped with a liquid shut-off valve (45). Both the gas circuit emergency shut-off valve (34) and the liquid circuit emergency shut-off valve (44) are equipped with fusible plugs, and both the gas circuit emergency shut-off valve (34) and the liquid circuit emergency shut-off valve (44) are connected to the control system (9). The input end of the sewage pipe (5) is connected to the sewage port (236) through the first sewage valve (51). The sewage port (236) is connected to the sewage pipe inside the tank (2). The input end of the sewage pipe is located in the liquid accumulation tank (237). The output end of the sewage pipe (5) is connected to the sewage outlet (53). The sewage pipe (5) is equipped with a second sewage valve (52). The gas distribution system (8) includes a compressed air tank (81), an air filter (82), a pressure gauge interface and multiple gas distribution interfaces connected in sequence; the pressure gauge interface is equipped with a second pressure gauge (74); the multiple gas distribution interfaces are respectively connected to an emergency shut-off valve (34), an emergency shut-off valve (35), a liquid shut-off valve (44), and a liquid shut-off valve (45).

2. The rocket propellant vehicle-mounted storage and transportation system according to claim 1, characterized in that: The gas phase pipeline (3) includes a gas phase main pipeline (31) and at least one gas phase branch pipeline. Each gas phase branch pipeline includes a first gas line (32) and a second gas line (33). One end of the gas phase main pipeline (31) is connected to the inlet / outlet gas port (234) through a gas line emergency shut-off valve (34), and the other end is connected to one end of each first gas line (32). The other end of the first gas line (32) is provided with the gas phase connector (36). The gas line shut-off valve (35) and the first gas line connection port are arranged sequentially on the first gas line (32) along the direction close to the gas phase connector (36). The first gas line connection port is connected to one end of the second gas line (33). The other end of the second gas line (33) is provided with the gas line nitrogen connector (39). The second gas line (33) is arranged sequentially with a gas line nitrogen shut-off valve (37) and the second gas line connection port (38) along the direction close to the gas line nitrogen connector (39).

3. The rocket propellant vehicle-mounted storage and transportation system according to claim 2, characterized in that: The gas phase pipeline (3) includes multiple gas phase branches, and the second gas connection ports (38) of two adjacent gas phase branches are connected to each other through pipelines.

4. The rocket propellant vehicle-mounted storage and transportation system according to claim 1, characterized in that: The liquid phase pipeline (4) includes a liquid phase main pipeline (41) and at least one liquid phase branch. Each liquid phase branch includes a first liquid path (42) and a second liquid path (43). One end of the liquid phase main pipeline (41) is connected to the inlet / outlet (235) through a liquid path emergency shut-off valve (44). The other end of the liquid phase main pipeline (41) is connected to one end of each first liquid path (42). The other end of the first liquid path (42) is provided with the liquid phase connector (46). The liquid path shut-off valve (45) and the first liquid path connection port are arranged sequentially along the direction close to the liquid phase connector (46) on the first liquid path (42). The first liquid path connection port is connected to one end of the second liquid path (43). The other end of the second liquid path (43) is provided with the liquid path nitrogen connector (49). The liquid path nitrogen shut-off valve (47) and the second liquid path connection port (48) are arranged sequentially along the direction close to the liquid phase connector (46) on the second liquid path (43).

5. A rocket propellant vehicle-mounted storage and transportation system according to claim 4, characterized in that: The liquid phase pipeline (4) includes multiple liquid phase branches, and the second liquid line connection ports (48) of two adjacent liquid phase branches are connected to each other through pipelines.

6. A rocket propellant vehicle-mounted storage and transportation system according to any one of claims 1 to 5, characterized in that: The sewage pipeline (5) includes a main sewage pipeline and at least one branch sewage pipeline. The input end of the main sewage pipeline is connected to the sewage interface (236) through the first sewage valve (51). The output end of the main sewage pipeline is connected to the input end of the branch sewage pipeline. The second sewage valve (52) and the sewage outlet (53) are sequentially arranged along the output direction on the branch sewage pipeline.

7. A rocket propellant vehicle-mounted storage and transportation system according to claim 6, characterized in that: The gas circuit emergency shut-off valve (34) and the corresponding gas distribution interface are sequentially provided with a first sensor (75) and a first solenoid valve (64), and the liquid circuit emergency shut-off valve (44) and the corresponding gas distribution interface are sequentially provided with a second sensor (76) and a second solenoid valve (65).

8. A rocket propellant vehicle-mounted storage and transportation system according to claim 7, characterized in that: The vehicle chassis (1) has a driver's cab (11) at the front, a tank body (2) in the middle via a saddle support, and a filling pipeline system, a gas distribution system (8) and a control system (9) at the rear. Dry powder fire extinguishers are installed on both sides of the tank body (2), and a grounding strip (12) is installed at the rear of the vehicle chassis (1) to prevent safety accidents caused by static sparks.

9. A rocket propellant vehicle-mounted storage and transportation system according to claim 8, characterized in that: The first pressure gauge (71), the level gauge (72), and the second pressure gauge (74) are controlled by the first pressure gauge valve (61), the level gauge valve (63), and the second pressure gauge valve (62), respectively.

10. A method for refueling a rocket propellant vehicle-mounted storage and transportation system as described in claim 1, comprising the following steps: Step 1: Before the first filling, replace the air in the tank (2) with nitrogen; Step 1.1: Confirm that all valves are closed and that the airtightness test is passed before proceeding to Step 1.2; Step 1.2: Turn on the control system (9), and then open the compressed air tank (81); Step 1.3: Open the gas shut-off valve (35) and the nitrogen connector (39) of the gas phase pipeline (3), and connect the nitrogen connector (39) to the nitrogen source; Step 1.4: Open the emergency shut-off valve (34) of the gas circuit, turn on the nitrogen source, and fill the tank (2) with nitrogen; Step 1.5: When the reading of the first pressure gauge (71) reaches the preset value, stop the nitrogen filling and close the gas circuit shut-off valve (35); Step 1.6: Determine whether the number of nitrogen filling cycles has reached the preset value. If yes, proceed to step 1.

7. Otherwise, open the gas circuit shut-off valve (35) and the gas phase connector (36) to allow the nitrogen in the tank (2) to be discharged through the gas phase connector (36). Observe the reading of the first pressure gauge (71). When the reading of the first pressure gauge (71) reaches 0, close the gas phase connector (36), then open the gas circuit nitrogen connector (39) to fill the tank (2) with nitrogen, and return to step 1.

5. Step 1.7: Open the gas circuit shut-off valve (35) and the gas phase connector (36) to allow the nitrogen in the tank (2) to be discharged through the gas phase connector (36), and observe the reading of the first pressure gauge (71). When the reading of the first pressure gauge (71) reaches the preset value, close the gas phase connector (36) and then close all the valves. Step 2: Preparations before rocket propellant loading; Step 2.1: Open the liquid phase connector (46) and the gas phase connector (36), and connect the liquid phase connector (46) to the rocket propellant storage tank and the gas phase connector (36) to the exhaust gas treatment device respectively. The exhaust gas treatment device is in the closed state. Step 2.2: Open the gas circuit shut-off valve (35) and the liquid circuit shut-off valve (45) to reduce the pressure in the liquid phase pipeline (4) and the gas phase pipeline (3); Step 3: Rocket propellant loading; Step 3.1: Open the compressed air tank (81) and make the reading of the second pressure gauge (74) greater than or equal to 0.4 MPa; Step 3.2: Open the gas circuit emergency shut-off valve (34), then open the liquid circuit emergency shut-off valve (44) and the gas circuit nitrogen connector (39), connect the gas circuit nitrogen connector (39) to the nitrogen source, turn on the nitrogen source, and pressurize the tank (2) with nitrogen so that the reading of the first pressure gauge (71) is not less than 0.2MPa; Step 3.3: Begin by adding rocket propellant into tank (2) from the medium storage tank; Step 4: Shut down rocket propellant loading; Step 4.1: When the rocket propellant loading reaches the preset loading amount, stop the rocket propellant loading; Step 4.2: Close the emergency shut-off valve (44) of the liquid circuit and the nitrogen source, and then open the waste gas treatment device to depressurize the tank (2); Step 4.3: When the reading of the first pressure gauge (71) is between 0.02MPa and 0.05MPa, close the gas circuit shut-off valve (35); Step 4.4: Close all valves and control systems (9) to complete the refueling of the rocket propellant vehicle-mounted storage and transportation system.

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