A liquid rocket propellant filling system

Abstract

The present application discloses a liquid rocket propellant filling system, which relates to the field of aerospace technology and includes: a mobile filling device, a tank truck / standard container for providing propellant, and a PLC system; wherein the mobile filling device is connected to the tank truck / standard container and the liquid oxygen tank or kerosene tank of the liquid rocket; the PLC system communicates with the mobile filling device, and controls the mobile filling device through the PLC system to adopt a corresponding filling mode to perform the filling process, wherein the filling mode includes at least: a pump filling mode and an extrusion filling mode; when the head is greater than a preset first height, the PLC system controls the mobile filling device to adopt the pump filling mode to perform the filling process; when the head is less than a preset second height or when the flow rate is less than a preset flow rate, the PLC system controls the mobile filling device to adopt the extrusion filling mode to perform the filling process. The present application has multiple filling modes and can be applied to different filling occasions.

Description

Technical Field

[0001] The present application relates to the field of aerospace technology, and in particular to a propellant filling system for a liquid rocket. Background Art

[0002] At present, the main methods of conventional rocket propellant filling are: pump pressure method, extrusion method and gravity method.

[0003] When the filling volume of the launch vehicle is large, closed filling with pump pressure is usually adopted. When using the pump pressure method, the tank needs to be pressurized to prevent cavitation of the pump and to obtain a large filling flow rate.

[0004] The extrusion method can only use an open filling method, and a large amount of propellant vapor needs to be discharged during filling, so it is usually only suitable for occasions with a small filling volume.

[0005] Gravity is only suitable for applications where the propellant tank is located at a higher elevation than the rocket tank. Gravity is also slow to fill, and a pump is still required to drain back the propellant. Therefore, it is generally not used for systems with large filling volumes.

[0006] Existing liquid rocket propellant filling systems can usually only perform a single conventional rocket propellant filling method, cannot be applied to different filling occasions, and have a small filling range. Summary of the Invention

[0007] The purpose of this application is to provide a liquid rocket propellant filling system with multiple filling modes, which can be applied to different filling occasions.

[0008] To achieve the above-mentioned objectives, the present application provides a propellant filling system for a liquid rocket, comprising: a mobile filling device, a tank truck / standard container for providing propellant, and a PLC system; wherein the mobile filling device is connected to the tank truck / standard container and the liquid oxygen tank or kerosene tank of the liquid rocket; the PLC system communicates with the mobile filling device, and controls the mobile filling device through the PLC system to adopt a corresponding filling mode to perform a filling process, wherein the filling mode includes at least: a pump filling mode and an extrusion filling mode; when the head is greater than a preset first height, the PLC system controls the mobile filling device to adopt the pump filling mode to perform the filling process; when the head is less than a preset second height or when the flow rate is less than a preset flow rate, the PLC system controls the mobile filling device to adopt the extrusion filling mode to perform the filling process.

[0009] As above, the mobile filling equipment includes: a liquid inlet, a pipeline gas inspection and purge gas inlet, a diversion port and a remote control valve air supply port; one end of the liquid inlet is connected to the tank truck / standard container; the other end of the liquid inlet is connected to one end of the air-controlled stop valve YGV401; the other end of the air-controlled stop valve YGV401 is connected to one end of the pump, and the other end of the pump is connected to one end of the check valve ZH6-1; the other end of the check valve ZH6-1 is connected to one end of the filter FL6-1; the other end of the filter FL6-1 is connected to one end of the pneumatic regulating valve YPV401; one end of the air-controlled stop valve YGV402 is connected to the other end of the liquid inlet and one end of the air-controlled stop valve YGV401; the other end of the air-controlled stop valve YGV402 is connected to The other end of the check valve ZH6-1 is connected to one end of the filter FL6-1; the other end of the pneumatic control valve YPV401 is connected to one end of the filling port; the other end of the filling port is connected to the liquid oxygen tank or kerosene tank of the liquid rocket; one end of the pneumatic control valve YPV402 is connected to the other end of the filter FL6-1 and one end of the pneumatic control valve YPV401; the other end of the pneumatic control valve YPV402 is connected to the other end of the pneumatic control valve YPV401 and the filling port; one end of the pipeline gas inspection and purge gas inlet is connected to the external gas source, and the other end of the pipeline gas inspection and purge gas inlet is connected to one end of the manual valve MJV6-1; the other end of the manual valve MJV6-1 is connected to the other end of the liquid inlet and the air-controlled stop valve YGV 401; one end of the diversion port is connected with one end of the manual valve MJV6-3 and one end of the pneumatic control valve YPV403; the other end of the manual valve MJV6-3 is connected with one end of the discharge port; one end of the manual valve MJV6-2 is connected with the other end of the manual valve MJV6-3 and one end of the discharge port; the other end of the manual valve MJV6-2 is connected with the other end of the liquid inlet, one end of the pneumatic stop valve YGV401 and one end of the pneumatic stop valve YGV402; the other end of the pneumatic control valve YPV403 is connected with the other end of the filter FL6-1, one end of the pneumatic stop valve YGV403, one end of the pneumatic control valve YPV401 and one end of the pneumatic control valve YPV402; the pneumatic control valve The other end of the stop valve YGV403 is connected to the other end of the manual valve MJV6-3 and one end of the discharge port; one end of the manual valve MJV6-4 is connected to the other end of the check valve ZH6-1, one end of the filter FL6-1 and one end of the manual valve MJV6-5; the other end of the manual valve MJV6-5 is connected to one end of the safety valve AV6-1; the other end of the manual valve MJV6-4 is connected to the other end of the safety valve AV6-1, one end of the manual valve MJV6-2, the other end of the manual valve MJV6-3 and one end of the discharge port; one end of the manual valve MJV6-6 is connected to the other end of the pneumatic control valve YPV401, the other end of the pneumatic control valve YPV402 and one end of the filling port;The other end of manual valve MJV6-6 is connected to one end of the discharge port, the other end of pneumatic stop valve YGV403, the other end of manual valve MJV6-4, the other end of safety valve AV6-1, the other end of manual valve MJV6-2, and the other end of manual valve MJV6-3. One end of the remote control valve air supply port is connected to the external control air source, and the other end of the remote control valve air supply port is connected to pneumatic stop valve YGV401, pneumatic stop valve YGV402, pneumatic stop valve YGV403, pneumatic control valve YPV401, pneumatic control valve YPV402, and pneumatic control valve YPV403.

[0010] As above, it also includes: pressure sensor YPT601, pressure sensor YPT602, temperature sensor YTT601, temperature sensor YTT602 and flow meter YFT601; pressure sensor YPT601, pressure sensor YPT602, temperature sensor YTT601, temperature sensor YTT602 and flow meter YFT601 all communicate with the PLC system; wherein, pressure sensor YPT601 is connected to one end of the air-controlled stop valve YGV401, one end of the air-controlled stop valve YGV402, the other end of the manual valve MJV6-2 and the other end of the liquid inlet; pressure sensor YPT602 is connected to one end of the flow meter YFT601, one end of the air-controlled stop valve YGV403, the filter F The other end of L6-1 is connected to the other end of the pneumatic control valve YPV403; the temperature sensor YTT601 is connected to the other end of the pneumatic stop valve YGV401 and one end of the pump; the temperature sensor YTT602 is connected to the other end of the pneumatic stop valve YGV402, one end of the filter FL6-1, the other end of the check valve ZH6-1, one end of the manual valve MJV6-4 and one end of the manual valve MJV6-5; one end of the flow meter YFT601 is also connected to one end of the pneumatic stop valve YGV403, the other end of the filter FL6-1 and the other end of the pneumatic control valve YPV403; the other end of the flow meter YFT601 is connected to one end of the pneumatic control valve YPV401 and one end of the pneumatic control valve YPV402.

[0011] As above, the flowmeter YFT601 is a vortex flowmeter or a mass flowmeter.

[0012] As above, the PLC system includes: a back-end host computer management subsystem and a front-end PLC control subsystem; wherein, the back-end host computer management subsystem: is used to generate automatic detection instructions according to the system parameters of the mobile filling equipment, and send the automatic detection instructions to the mobile filling equipment to complete automatic detection, wherein the system parameters include at least: equipment status, filling temperature, filling pressure, filling flow and liquid level; is used to display display data, wherein the display data includes at least: dynamic flow charts, real-time trend charts and dynamic parameters; is used to record and / or print automatic detection data; the front-end PLC control subsystem: is used to control the filling mode of the mobile filling equipment of the mobile filling equipment; receives the automatic detection data collected by the mobile filling equipment to execute the automatic detection instruction, wherein the automatic detection data includes at least: temperature sensor signals, pressure sensor signals, flow sensor signals and liquid level sensor signals.

[0013] As mentioned above, the temperature sensor signals are collected by the temperature sensor YTT601 and the temperature sensor YTT602, and the temperature sensor signals are sent to the PLC system as automatic detection data. The PLC system analyzes the automatic detection data to obtain analysis results, and determines whether the preparatory work before the mobile filling equipment is sufficient to carry out the formal filling work based on the analysis results. If so, the filling process is executed through the corresponding filling mode.

[0014] As mentioned above, the flow sensor signal is collected by a vortex flowmeter and sent to the PLC system as automatic detection data. The PLC system analyzes the automatic detection data to obtain analysis results, and adjusts the opening of the pneumatic control valve YPV401 and / or the pneumatic control valve YPV402 according to the analysis results, thereby realizing flow rate adjustment.

[0015] As mentioned above, pressure sensor signals are collected through pressure sensor YPT601 and pressure sensor YPT602, and the pressure sensor signals are sent to the PLC system as automatic detection data. The PLC system analyzes the automatic detection data to obtain analysis results. During the filling suspension phase, the PLC system is reminded to control the mobile filling equipment to complete the pipeline pressure relief work based on the analysis results.

[0016] As mentioned above, the extrusion gas source of the extrusion filling mode adopts the gasification and pressurization of its own medium or adopts an external gas source.

[0017] As mentioned above, in the pump filling mode, the pump is a centrifugal pump, a liquid oxygen pump or a shielded pump.

[0018] The beneficial effects achieved by this application are as follows:

[0019] (1) The liquid rocket propellant filling system of the present application has dual functions of squeeze filling mode and pump filling mode, which can achieve a larger filling range.

[0020] (2) The liquid rocket propellant filling system of the present application has both proximal and remote control functions, and is easy to operate.

[0021] (3) The liquid rocket propellant filling system of the present application can complete the reservation, filling and discharge of low-temperature liquid tanks, as well as the filling and discharge of normal-temperature liquid tanks.

[0022] (4) The liquid rocket propellant filling system of the present application has a flow rate regulation function and can adapt to different flow rate requirements in pre-cooling, large-flow filling, deceleration filling, and replenishment.

[0023] (5) The liquid rocket propellant filling system of the present application has the functions of monitoring filling temperature, filling pressure and filling flow. By monitoring the filling temperature, it is ensured that the preparatory work before filling of the mobile filling equipment meets the requirements for carrying out the formal filling work; by monitoring the filling pressure, it is possible to timely control the mobile filling equipment to complete the pipeline pressure relief work during the filling stop phase; by monitoring the filling flow, it is possible to adjust the flow rate, thereby improving the safety of the filling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0025] Figure 1 A schematic structural diagram of an embodiment of a liquid rocket propellant filling system;

[0026] Figure 2 This is the liquid oxygen filling principle diagram of the mobile filling equipment. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0028] like Figure 1-2As shown, the present application provides a liquid rocket propellant filling system, including: a mobile filling device 1, a tank truck / standard container 2 for providing propellant, and a PLC (Programmable Logic Controller) system.

[0029] The mobile filling equipment 1 is connected to the tank truck / standard container 2 and the liquid oxygen tank or kerosene tank of the liquid rocket 3.

[0030] The PLC system communicates with the mobile filling device 1 , and controls the mobile filling device 1 to perform a filling process using a corresponding filling mode through the PLC system, wherein the filling mode includes at least a pump filling mode and an extrusion filling mode.

[0031] Specifically, the PLC system controls the opening and closing of various valves in the mobile refueling equipment 1, thereby enabling control of different refueling modes. These modes are selected based on the different refueling requirements of the liquid rocket 3. These valves include pneumatic control valves, pneumatic shut-off valves, and solenoid valves. The refueling process of the rocket refueling system primarily includes pipeline precooling, low-flow refueling, high-flow refueling, refueling, stopping refueling, and completely draining the pipeline.

[0032] The liquid rocket propellant filling system of the present application can meet the filling requirements of different media such as cryogenic liquid and normal temperature liquid. For example, for liquid oxygen and kerosene pump filling, it is only necessary to select the pump of the corresponding medium. That is, after selecting the pump of the corresponding medium, the mobile filling device 1 can be used as liquid oxygen filling device or kerosene filling device. Figure 1 As shown, when the mobile filling device 1 is used as a liquid oxygen filling device, the mobile filling device 1 is connected to the liquid oxygen tank and the liquid oxygen tank truck of the liquid rocket 3. When the mobile filling device 1 is used as a kerosene filling device, the mobile filling device 1 is connected to the kerosene tank and the kerosene tank truck of the liquid rocket 3.

[0033] When the lift is greater than the preset first height (ie, the lift is relatively high), the PLC system controls the mobile filling device 1 to perform the filling process in a pump filling mode, wherein the specific value of the first height is set according to actual conditions.

[0034] Specifically, the pump-type filling mode (pump pressure method) uses a pump to ensure the required filling pressure and flow rate. The pump pressure method is easy to control the filling pressure and flow rate, and the filling speed is fast. It can be used for filling large propellant volumes.

[0035] Furthermore, the filling pump in the pump filling mode is preferably a centrifugal pump, but is not limited to a centrifugal pump, and can also be other pumps such as a shielded pump and a liquid oxygen pump.

[0036] When the lift is less than a preset second height (i.e., the lift is relatively low) or when the flow rate is less than a preset flow rate (i.e., the flow rate is relatively low), the PLC system controls the mobile filling equipment 1 to perform the filling process in a squeeze filling mode. The specific value of the second height is set based on actual conditions. The specific value of the preset flow rate is set based on actual conditions.

[0037] Specifically, the squeeze filling mode (i.e., the squeeze method) uses the boost pressure of the storage tank to ensure the required filling pressure and flow. The squeeze method is limited by the pressure capacity of the storage tank and has a slow filling speed. It is usually used for filling small propellant volumes.

[0038] Furthermore, the extrusion gas source of the extrusion filling mode adopts the gasification and pressurization of its own medium or adopts an external gas source.

[0039] Further, such as Figure 2 As shown, the mobile filling equipment 1 includes: a liquid inlet, a pipeline gas inspection and purge gas inlet, a diversion port and a remote control valve gas supply port.

[0040] One end of the liquid inlet is connected to the tank truck / standard container; the other end of the liquid inlet is connected to one end of the air-controlled stop valve YGV401.

[0041] The other end of the air-controlled stop valve YGV401 is connected to one end of the pump, and the other end of the pump is connected to one end of the check valve ZH6-1.

[0042] The other end of the check valve ZH6-1 is connected to one end of the filter FL6-1; the other end of the filter FL6-1 is connected to one end of the pneumatic control valve YPV401.

[0043] One end of the air-controlled stop valve YGV402 is connected to the other end of the liquid inlet and one end of the air-controlled stop valve YGV401; the other end of the air-controlled stop valve YGV402 is connected to the other end of the check valve ZH6-1 and one end of the filter FL6-1.

[0044] The other end of the pneumatic regulating valve YPV401 is connected to one end of the filling port; the other end of the filling port is connected to the liquid oxygen tank or kerosene tank of the liquid rocket.

[0045] One end of the pneumatic control valve YPV402 is connected to the other end of the filter FL6-1 and one end of the pneumatic control valve YPV401; the other end of the pneumatic control valve YPV402 is connected to the other end of the pneumatic control valve YPV401 and the filling port.

[0046] One end of the pipeline gas inspection and purge gas inlet is connected to the external gas source, and the other end of the pipeline gas inspection and purge gas inlet is connected to one end of the manual valve MJV6-1; the other end of the manual valve MJV6-1 is connected to the other end of the liquid inlet and one end of the air-controlled stop valve YGV401.

[0047] One end of the diversion port is connected to one end of the manual valve MJV6-3 and one end of the pneumatic control valve YPV403.

[0048] The other end of the manual valve MJV6-3 is connected to one end of the discharge port.

[0049] One end of the manual valve MJV6-2 is connected to the other end of the manual valve MJV6-3 and one end of the discharge port; the other end of the manual valve MJV6-2 is connected to the other end of the liquid inlet, one end of the air-controlled stop valve YGV401 and one end of the air-controlled stop valve YGV402.

[0050] The other end of the pneumatic control valve YPV403 is connected to the other end of the filter FL6-1, one end of the pneumatic stop valve YGV403, one end of the pneumatic control valve YPV401 and one end of the pneumatic control valve YPV402.

[0051] The other end of the air-controlled stop valve YGV403 is connected to the other end of the manual valve MJV6-3 and one end of the discharge port.

[0052] One end of the manual valve MJV6-4 is connected to the other end of the check valve ZH6-1, one end of the filter FL6-1 and one end of the manual valve MJV6-5; the other end of the manual valve MJV6-5 is connected to one end of the safety valve AV6-1.

[0053] The other end of the manual valve MJV6-4 is connected to the other end of the safety valve AV6-1, one end of the manual valve MJV6-2, the other end of the manual valve MJV6-3 and one end of the discharge port.

[0054] One end of the manual valve MJV6-6 is connected to the other end of the pneumatic control valve YPV401, the other end of the pneumatic control valve YPV402 and one end of the filling port.

[0055] The other end of the manual valve MJV6-6 is connected to one end of the discharge port, the other end of the air-controlled stop valve YGV403, the other end of the manual valve MJV6-4, the other end of the safety valve AV6-1, the other end of the manual valve MJV6-2 and the other end of the manual valve MJV6-3.

[0056] One end of the remote control valve air supply port is connected to the external control air source, and the other end of the remote control valve air supply port is connected to the air control stop valve YGV401, air control stop valve YGV402, air control stop valve YGV403, pneumatic control valve YPV401, pneumatic control valve YPV402 and pneumatic control valve YPV403.

[0057] Specifically, the connection relationship between the liquid inlet, pipeline gas inspection and purge gas inlet, diversion port, remote control valve air supply port, various valves (for example: air-controlled stop valve YGV401, check valve ZH6-1, pneumatic control valve YPV402 and pneumatic control valve YPV401 and other valves), and filter FL6-1 of the mobile filling equipment 1 is: connected through pipelines.

[0058] Among them, the specific size and specific material of each pipe are set according to the actual situation. The present application preferably adopts: the pipe at the liquid inlet is a DN65 pipe; the pipe at the diversion port is a DN40 pipe; the pipe at the pneumatic control valve YPV403 is a DN40 pipe; the pipe at the pneumatic control valve YPV401 is a DN50 pipe; the pipe at the pneumatic control valve YPV402 is a DN25 pipe; DN represents the nominal diameter, the unit is millimeter (mm).

[0059] Furthermore, the propellant filling system of the liquid rocket also includes: pressure sensor YPT601, pressure sensor YPT602, temperature sensor YTT601, temperature sensor YTT602 and flow meter YFT601; pressure sensor YPT601, pressure sensor YPT602, temperature sensor YTT601, temperature sensor YTT602 and flow meter YFT601 all communicate with the PLC system.

[0060] Among them, the pressure sensor YPT601 is connected to one end of the air-controlled stop valve YGV401, one end of the air-controlled stop valve YGV402, the other end of the manual valve MJV6-2 and the other end of the liquid inlet.

[0061] The pressure sensor YPT602 is connected to one end of the flow meter YFT601, one end of the pneumatic stop valve YGV403, the other end of the filter FL6-1 and the other end of the pneumatic control valve YPV403.

[0062] The temperature sensor YTT601 is connected to the other end of the gas-controlled stop valve YGV401 and one end of the pump.

[0063] The temperature sensor YTT602 is connected to the other end of the air-controlled stop valve YGV402, one end of the filter FL6-1, the other end of the check valve ZH6-1, one end of the manual valve MJV6-4 and one end of the manual valve MJV6-5.

[0064] One end of the flowmeter YFT601 is also connected to one end of the air-controlled stop valve YGV403, the other end of the filter FL6-1 and the other end of the pneumatic control valve YPV403; the other end of the flowmeter YFT601 is connected to one end of the pneumatic control valve YPV401 and one end of the pneumatic control valve YPV402.

[0065] Specifically, the pressure sensor YPT601, the pressure sensor YPT602, the temperature sensor YTT601, the temperature sensor YTT602 and the flow meter YFT601 are all arranged on the pipeline.

[0066] Furthermore, the flowmeter YFT601 is a vortex flowmeter or a mass flowmeter, but is not limited to a vortex flowmeter or a mass flowmeter.

[0067] Specifically, when the mobile filling equipment 1 uses the pump filling mode, the external control air source is input through the remote control valve air supply port to control the air control stop valve YGV401 and the pneumatic control valve YPV401 to open, and the propellant flows into the mobile filling equipment 1 through the liquid inlet, and then flows through the air control stop valve YGV401, temperature sensor YTT601, pump, check valve ZH6-1, filter FL6-1, flow meter YFT601 and pneumatic control valve YPV401 in sequence, and then the filling process is completed through the filling port. The external control air source is input through the remote control valve air supply port to control the pneumatic control valve YPV403 and the air control stop valve YGV403 to open, and the filling diversion enters the mobile filling equipment 1 through the diversion port, and then flows through the pneumatic control valve YPV403 and the air control stop valve YGV403 in sequence, and then is discharged through the discharge port.

[0068] When the mobile filling equipment 1 uses the extrusion filling mode, an external control air source is input through the remote control valve air supply port to control the opening of the air control stop valve YGV402 and the pneumatic control valve YPV401. The propellant flows into the mobile filling equipment 1 through the liquid inlet, and then flows through the air control stop valve YGV402, temperature sensor YTT602, filter FL6-1, flow meter YFT601, and pneumatic control valve YPV401 in sequence, completing the filling process through the filling port. An external control air source is input through the remote control valve air supply port to control the opening of the pneumatic control valve YPV403 and the air control stop valve YGV403. The filling diversion enters the mobile filling equipment 1 through the diversion port, flows through the pneumatic control valve YPV403 and the air control stop valve YGV403 in sequence, and is discharged through the discharge port.

[0069] Furthermore, the PLC system includes: a back-end host computer management subsystem and a front-end PLC control subsystem.

[0070] Among them, the back-end host computer management subsystem is used to generate automatic detection instructions based on the system parameters of the mobile filling equipment 1, and send the automatic detection instructions to the mobile filling equipment 1 to complete automatic detection, wherein the system parameters include at least: equipment status, filling temperature, filling pressure, filling flow and liquid level; used to display display data, wherein the display data includes at least: dynamic flow charts, real-time trend charts and dynamic parameters; used to record and / or print automatic detection data.

[0071] Front-end PLC control subsystem: used to control the filling mode of the mobile filling device 1; receive automatic detection data collected by the mobile filling device 1 when executing the automatic detection instruction, wherein the automatic detection data at least includes: temperature sensor signal, pressure sensor signal, flow sensor signal and liquid level sensor signal.

[0072] Specifically, the back-end host computer management subsystem can display the filling process of various filling modes of the entire liquid rocket propellant filling system, as well as the equipment status to the operator.

[0073] Furthermore, the temperature sensor signal (i.e., the filling temperature) is collected through the temperature sensor YTT601 and the temperature sensor YTT602, and the temperature sensor signal is sent to the PLC system as automatic detection data. The PLC system analyzes the automatic detection data to obtain the analysis results, and determines whether the preparatory work before filling of the mobile filling equipment 1 meets the requirements for carrying out formal filling work based on the analysis results. If so, the filling process is executed through the corresponding filling mode.

[0074] Specifically, the specific method of determining whether the preparatory work before filling of the mobile filling equipment 1 satisfies the requirements for carrying out the formal filling work based on the analysis result is an existing technology, so it will not be described in detail.

[0075] Furthermore, in the filling process of the rocket filling system, there are different requirements for small flow and large flow. The flow sensor signal is collected by a vortex flowmeter, and the flow sensor signal (i.e., filling flow) is sent to the PLC system as automatic detection data. The PLC system analyzes the automatic detection data to obtain the analysis results, and adjusts the opening of the pneumatic control valve YPV401 and / or the pneumatic control valve YPV402 according to the analysis results, thereby realizing the size adjustment of the flow.

[0076] Furthermore, the pressure sensor signal (i.e., filling pressure) is collected through the pressure sensor YPT601 and the pressure sensor YPT602, and the pressure sensor signal is sent to the PLC system as automatic detection data. The PLC system analyzes the automatic detection data to obtain analysis results. During the filling suspension phase (such as when the pressure rises to a value that ensures the safety of the pipeline system through pressure relief), the PLC system is reminded to control the mobile filling equipment 1 to complete the pipeline pressure relief work based on the analysis results.

[0077] The beneficial effects achieved by this application are as follows:

[0078] (1) The liquid rocket propellant filling system of the present application has dual functions of squeeze filling mode and pump filling mode, which can achieve a larger filling range.

[0079] (2) The liquid rocket propellant filling system of the present application has both proximal and remote control functions, and is easy to operate.

[0080] (3) The liquid rocket propellant filling system of the present application can complete the reservation, filling and discharge of low-temperature liquid tanks, as well as the filling and discharge of normal-temperature liquid tanks.

[0081] (4) The liquid rocket propellant filling system of the present application has a flow rate regulation function and can adapt to different flow rate requirements in pre-cooling, large-flow filling, deceleration filling, and replenishment.

[0082] (5) The liquid rocket propellant filling system of the present application has the functions of monitoring filling temperature, filling pressure and filling flow. By monitoring the filling temperature, it is ensured that the preparatory work before filling of the mobile filling equipment meets the requirements for carrying out the formal filling work; by monitoring the filling pressure, it is possible to timely control the mobile filling equipment to complete the pipeline pressure relief work during the filling stop phase; by monitoring the filling flow, it is possible to adjust the flow rate, thereby improving the safety of the filling process.

[0083] Although preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the underlying inventive concepts. Therefore, the scope of protection of this application is intended to include the preferred embodiments and all changes and modifications that fall within the scope of this application. Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if such changes and modifications of this application fall within the scope of protection of this application and its equivalents, then this application is intended to include such changes and modifications.

Claims

1. A liquid rocket propellant filling system, characterized in that: include: Mobile filling equipment, tankers / standard containers for providing propellant, and PLC systems; The mobile filling equipment is connected to the tank truck / standard container and the liquid oxygen tank or kerosene tank of the liquid rocket; The PLC system communicates with the mobile filling device, and controls the mobile filling device to perform the filling process using a corresponding filling mode through the PLC system, wherein the filling mode includes at least: a pump filling mode and an extrusion filling mode; When the lift is greater than the preset first height, the PLC system controls the mobile filling equipment to perform the filling process in a pump filling mode; When the lift is less than the preset second height or when the flow rate is less than the preset flow rate, the PLC system controls the mobile filling equipment to perform the filling process in the squeeze filling mode.

2. The liquid rocket propellant filling system according to claim 1, characterized in that: The mobile filling equipment includes: liquid inlet, pipeline gas inspection and purge gas inlet, diversion port and remote control valve gas supply port; One end of the liquid inlet is connected to the tank truck / standard container; the other end of the liquid inlet is connected to one end of the air-controlled stop valve YGV401; The other end of the air-controlled stop valve YGV401 is connected to one end of the pump, and the other end of the pump is connected to one end of the check valve ZH6-1; The other end of the check valve ZH6-1 is connected to one end of the filter FL6-1; the other end of the filter FL6-1 is connected to one end of the pneumatic control valve YPV401; One end of the air-controlled stop valve YGV402 is connected to the other end of the liquid inlet and one end of the air-controlled stop valve YGV401; the other end of the air-controlled stop valve YGV402 is connected to the other end of the check valve ZH6-1 and one end of the filter FL6-1; The other end of the pneumatic regulating valve YPV401 is connected to one end of the filling port; the other end of the filling port is connected to the liquid oxygen tank or kerosene tank of the liquid rocket; One end of the pneumatic control valve YPV402 is connected to the other end of the filter FL6-1 and one end of the pneumatic control valve YPV401; the other end of the pneumatic control valve YPV402 is connected to the other end of the pneumatic control valve YPV401 and the filling port; One end of the pipeline gas inspection and purge gas inlet is connected to the external gas source, and the other end of the pipeline gas inspection and purge gas inlet is connected to one end of the manual valve MJV6-1; the other end of the manual valve MJV6-1 is connected to the other end of the liquid inlet and one end of the air-controlled stop valve YGV401; One end of the diversion port is connected to one end of the manual valve MJV6-3 and one end of the pneumatic control valve YPV403; The other end of the manual valve MJV6-3 is connected to one end of the discharge port; One end of the manual valve MJV6-2 is connected to the other end of the manual valve MJV6-3 and one end of the discharge port; the other end of the manual valve MJV6-2 is connected to the other end of the liquid inlet, one end of the air-controlled stop valve YGV401 and one end of the air-controlled stop valve YGV402; The other end of the pneumatic control valve YPV403 is connected to the other end of the filter FL6-1, one end of the pneumatic stop valve YGV403, one end of the pneumatic control valve YPV401 and one end of the pneumatic control valve YPV402; The other end of the air-controlled stop valve YGV403 is connected to the other end of the manual valve MJV6-3 and one end of the discharge port; One end of the manual valve MJV6-4 is connected to the other end of the check valve ZH6-1, one end of the filter FL6-1 and one end of the manual valve MJV6-5; the other end of the manual valve MJV6-5 is connected to one end of the safety valve AV6-1; The other end of the manual valve MJV6-4 is connected to the other end of the safety valve AV6-1, one end of the manual valve MJV6-2, the other end of the manual valve MJV6-3 and one end of the discharge port; One end of the manual valve MJV6-6 is connected to the other end of the pneumatic control valve YPV401, the other end of the pneumatic control valve YPV402 and one end of the filling port; The other end of the manual valve MJV6-6 is connected to one end of the discharge port, the other end of the air-controlled stop valve YGV403, the other end of the manual valve MJV6-4, the other end of the safety valve AV6-1, the other end of the manual valve MJV6-2, and the other end of the manual valve MJV6-3; One end of the remote control valve air supply port is connected to the external control air source, and the other end of the remote control valve air supply port is connected to the air control stop valve YGV401, air control stop valve YGV402, air control stop valve YGV403, pneumatic control valve YPV401, pneumatic control valve YPV402 and pneumatic control valve YPV403.

3. The liquid rocket propellant filling system according to claim 2, characterized in that: Also includes: Pressure sensor YPT601, pressure sensor YPT602, temperature sensor YTT601, temperature sensor YTT602 and flow meter YFT601; pressure sensor YPT601, pressure sensor YPT602, temperature sensor YTT601, temperature sensor YTT602 and flow meter YFT601 all communicate with the PLC system; Among them, the pressure sensor YPT601 is connected to one end of the air-controlled stop valve YGV401, one end of the air-controlled stop valve YGV402, the other end of the manual valve MJV6-2 and the other end of the liquid inlet; The pressure sensor YPT602 is connected to one end of the flow meter YFT601, one end of the pneumatic stop valve YGV403, the other end of the filter FL6-1 and the other end of the pneumatic control valve YPV403; Connect the temperature sensor YTT601 to the other end of the gas-controlled stop valve YGV401 and one end of the pump; Connect the temperature sensor YTT602 to the other end of the air-controlled stop valve YGV402, one end of the filter FL6-1, the other end of the check valve ZH6-1, one end of the manual valve MJV6-4, and one end of the manual valve MJV6-5; One end of the flowmeter YFT601 is also connected to one end of the air-controlled stop valve YGV403, the other end of the filter FL6-1 and the other end of the pneumatic control valve YPV403; the other end of the flowmeter YFT601 is connected to one end of the pneumatic control valve YPV401 and one end of the pneumatic control valve YPV402.

4. The liquid rocket propellant filling system according to claim 3, characterized in that: Flowmeter YFT601 is a vortex flowmeter or mass flowmeter.

5. The liquid rocket propellant filling system according to claim 3, characterized in that: The PLC system includes: back-end host computer management subsystem and front-end PLC control subsystem; The back-end host computer management subsystem is used to generate automatic detection instructions based on the system parameters of the mobile filling equipment and send the automatic detection instructions to the mobile filling equipment to complete automatic detection, wherein the system parameters include at least: equipment status, filling temperature, filling pressure, filling flow rate and liquid level; is used to display display data, wherein the display data includes at least: dynamic flow charts, real-time trend charts and dynamic parameters; and is used to record and / or print automatic detection data; Front-end PLC control subsystem: used to control the filling mode of the mobile filling equipment; receive automatic detection data collected by the mobile filling equipment when executing automatic detection instructions, wherein the automatic detection data at least includes: temperature sensor signals, pressure sensor signals, flow sensor signals and liquid level sensor signals.

6. The liquid rocket propellant filling system according to claim 5, characterized in that: Temperature sensor signals are collected through temperature sensor YTT601 and temperature sensor YTT602, and sent to the PLC system as automatic detection data. The PLC system analyzes the automatic detection data to obtain analysis results, and determines whether the preparatory work before filling of the mobile filling equipment meets the requirements for carrying out formal filling work based on the analysis results. If so, the filling process is executed through the corresponding filling mode.

7. The liquid rocket propellant filling system according to claim 5, characterized in that: The flow sensor signal is collected by the vortex flowmeter and sent to the PLC system as automatic detection data. The PLC system analyzes the automatic detection data to obtain analysis results and adjusts the opening of the pneumatic control valve YPV401 and / or the pneumatic control valve YPV402 according to the analysis results, thereby realizing flow rate adjustment.

8. The liquid rocket propellant filling system according to claim 5, characterized in that: The pressure sensor signals are collected through pressure sensor YPT601 and pressure sensor YPT602, and sent to the PLC system as automatic detection data. The PLC system analyzes the automatic detection data to obtain analysis results. During the filling suspension phase, the PLC system is reminded to control the mobile filling equipment to complete the pipeline pressure relief work based on the analysis results.

9. The liquid rocket propellant filling system according to claim 5, characterized in that: The extrusion gas source of the extrusion filling mode adopts the gasification and pressurization of its own medium or an external gas source.

10. The liquid rocket propellant filling system according to claim 5, characterized in that: In the pump filling mode, the pump is a centrifugal pump, liquid oxygen pump or shielded pump.

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