CN220506502U - Rocket supercooling liquid oxygen high-flow filling system - Google Patents

Abstract

The utility model provides a rocket supercooled liquid oxygen high-flow filling system, which comprises a liquid oxygen tank, a filling and blowing structure and a ground liquid oxygen pipeline structure, wherein the liquid oxygen tank, the filling and blowing structure and the ground liquid oxygen pipeline structure are arranged on an rocket body; the filling and blowing-off structure comprises an input pipe, a connecting pipe, a blowing-off pipe, a first tee joint, an on-arrow filling valve and a ground liquid oxygen precooling discharge valve; the connecting pipe and the blowing pipe are connected to the output end of the input pipe through a first tee joint; the connecting pipe is connected with the liquid oxygen box of the rocket body, and the rocket upper filling valve is positioned between the connecting pipe and the liquid oxygen box of the rocket body; the ground liquid oxygen precooling discharge valve is fixed on the blowing pipe; the input end of the input pipe is connected with the ground liquid oxygen pipeline structure. The device has reasonable structure, can realize quick and large-flow filling of the supercooled liquid oxygen through the parallel combination of the ground liquid oxygen pipeline structures with the same structure, improves the total filling flow of the supercooled liquid oxygen under the condition of ensuring that the supercooled temperature of the liquid oxygen is unchanged, improves the filling efficiency, reduces the development and production cost, and has strong applicability and good practicability.

Description

Rocket supercooling liquid oxygen high-flow filling system

Technical Field

The utility model relates to the technical field of low-temperature refrigeration equipment, in particular to a rocket supercooling liquid oxygen high-flow filling system.

Background

Compared with normal-temperature propellant, the low-temperature propellant has been widely applied to new generation carrier rockets due to the advantages of high specific impact, no toxicity, no pollution and the like, wherein the liquid oxygen/liquid hydrogen combination has significant advantages in specific impact, and becomes the first choice of future long-distance deep space exploration tasks, and the liquid oxygen/kerosene combination has high attention in the field of commercial aerospace due to the significant advantages in cost;

if the low-temperature propellant in a supercooled state is adopted, the problem of evaporation of the low-temperature propellant can be effectively solved, the system quality is reduced, the engine performance is improved, and the on-orbit storage time is prolonged, so that the low-temperature propellant supercooling technology has important application value;

the Chinese patent publication number is: CN115371298B, patent name: a skid-mounted system and method for synchronous deep supercooling of liquid hydrogen and liquid oxygen. The skid-mounted system performs deep supercooling on liquid hydrogen in a vacuum and pressure-reducing mode to improve the density of the liquid hydrogen, and simultaneously performs cold energy utilization on the evacuated and discharged hydrogen, so that the evacuated and discharged hydrogen is converted by Zhong Zhengqing to release cold energy which is greater than the latent heat of gas-liquid phase, and then the cold energy is safely transferred to liquid oxygen in an indirect heat exchange mode of a heat pipe, so that the synchronous deep supercooling of the liquid oxygen is realized, and the density of the liquid oxygen is improved.

In the process of implementing the present utility model, the inventor finds that at least the following problems exist in the prior art: the liquid oxygen filling system has the advantages that the structure is very complex, a heat exchanger, a low-temperature heat pipe cooler, an evacuating device, a Zhong Zhengqing converter, a liquid oxygen pumping device, a liquid oxygen supercooling pipeline and a liquid hydrogen supercooling pipeline are needed, the cost is greatly increased, the liquid oxygen cooling time is longer, the supercooling liquid oxygen filling flow is lower, the temperature rise of liquid oxygen is increased due to long-time heat leakage, the development and production cost of the full supercooling high-flow liquid oxygen filling system are greatly increased, and therefore the applicability and the practicability are limited.

Disclosure of Invention

In view of the above, an object of the embodiments of the present utility model is to provide a rocket supercooled liquid oxygen high-flow filling system which is reasonable in structural arrangement and beneficial to cost reduction.

In a first aspect, an embodiment of the present utility model provides a rocket supercooled liquid oxygen high-flow filling system, which includes a liquid oxygen tank disposed on an rocket body, a filling and blowing structure communicated with the liquid oxygen tank, and a plurality of ground liquid oxygen pipeline structures with the same structure connected with an input end of the filling and blowing structure;

the filling and blowing-off structure comprises an input pipe, a connecting pipe, a blowing-off pipe, a first tee joint, an on-arrow filling valve and a ground liquid oxygen precooling discharge valve;

the connecting pipe and the blowing pipe are connected to the output end of the input pipe through a first tee joint;

the connecting pipe is connected with the liquid oxygen box of the rocket body, and the on-rocket filling valve is positioned between the connecting pipe and the liquid oxygen box of the rocket body;

the ground liquid oxygen precooling discharge valve is fixed on the blowing pipe;

the input end of the input pipe is connected with the ground liquid oxygen pipeline structure.

Further preferred are: the ground liquid oxygen pipeline structure comprises a plurality of liquid oxygen tank cars, a plurality of filling ball valves, a connecting conduit, a second tee joint, a third tee joint, a plurality of liquid oxygen flow regulating electromagnetic valves, a plurality of connecting tee joints, a cooling conduit and a plurality of liquid nitrogen cooling structures;

the filling ball valves are in one-to-one correspondence with the liquid oxygen tank vehicles and are connected to the output ends of the liquid oxygen tank vehicles;

the output end of the filling ball valve is connected with the input end of the connecting conduit through a second tee joint;

the output end of the connecting conduit is connected with the input end of the input pipe through a third tee joint;

two ends of the cooling conduit are respectively communicated with the connecting conduit through a connecting tee joint;

the liquid nitrogen cooling structure is matched with the cooling guide pipe to realize cooling;

the liquid oxygen flow regulating electromagnetic valve is connected to the input end of the cooling conduit and the connecting conduit, and the liquid oxygen flow regulating electromagnetic valve on the connecting conduit is positioned between the connecting tee joints at two ends of the cooling conduit.

Further preferred are: the liquid nitrogen cooling structure comprises a liquid nitrogen tank car, a liquid nitrogen guide pipe, a peroxy cooler, a liquid nitrogen flow regulating electromagnetic valve, a liquid nitrogen flow controller and a liquid nitrogen flowmeter;

the liquid nitrogen tank car is connected with the input end of the peroxy cooler through a liquid nitrogen guide pipe;

the liquid nitrogen flow regulating electromagnetic valve and the liquid nitrogen flowmeter are connected in series between the liquid nitrogen tank car and the peroxy cooler, the liquid nitrogen flowmeter is connected with the liquid nitrogen flow regulating electromagnetic valve through a liquid nitrogen flow controller, and the liquid nitrogen flowmeter realizes the regulation of the liquid nitrogen flow regulating electromagnetic valve through the liquid nitrogen flow controller;

the cooling conduit passes through the peroxygen cooler in a wave-like manner.

Further preferred are: the liquid oxygen filling flow meter and the filling controller are arranged between the output end of the connecting conduit and the third tee joint, the liquid oxygen filling flow meter is respectively connected with the liquid oxygen flow regulating electromagnetic valve through the filling controller, and the liquid oxygen filling flow meter realizes the regulation of the liquid oxygen flow regulating electromagnetic valve through the filling controller.

Further preferred are: the ground liquid oxygen pipeline structure also comprises a ground liquid nitrogen blowing air source, a blowing input conduit, a gas manual switch and a plurality of pipeline nitrogen blowing adapter;

the output end of the ground liquid nitrogen blowing air source is connected with the blowing input conduit, the gas manual switch is arranged on the blowing input conduit, and the output end of the blowing input conduit is connected to a pipeline between the liquid oxygen tank car and the filling ball valve through a pipeline nitrogen blowing adapter.

Further preferred are: the connecting conduit is provided with a liquid oxygen temperature sensor and a liquid oxygen pressure sensor.

Further preferred are: and a liquid nitrogen temperature sensor and a liquid nitrogen pressure sensor are arranged on the liquid nitrogen guide pipe.

Further preferred are: a ground liquid oxygen filling valve is arranged between the input pipe and the first tee joint.

Further preferred are: the middle part of the input pipe and the output end of the filling ball valve are both provided with liquid oxygen filters.

Further preferred are: the number of the ground liquid oxygen pipeline structures is three; the number of the liquid nitrogen cooling structures is three.

The technical scheme has the following beneficial effects: the device has reasonable structural arrangement, can realize quick and large-flow filling of supercooled liquid oxygen through the parallel combination of a plurality of ground liquid oxygen pipeline structures with the same structure, improves the total filling flow of supercooled liquid oxygen under the condition of ensuring that the supercooling temperature of liquid oxygen is unchanged, is beneficial to improving the filling efficiency, has fewer integral structural parts, does not need large-scale filling equipment, has stronger part universality, is beneficial to reducing the cost, can reduce the development and production cost, and has strong applicability and good practicability.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a rocket supercooled liquid oxygen high flow charging system of the present utility model;

FIG. 2 is a schematic view of a specific enlarged structure of the filling and blowing structure of FIG. 1;

FIG. 3 is a schematic view of a specific enlarged structure of the liquid nitrogen cooling structure in FIG. 1;

fig. 4 is an enlarged schematic view of the structure at a in fig. 1.

Reference numerals:

1. a liquid oxygen tank;

2. filling and blowing off structures; 21. an input tube; 22. a connecting pipe; 23. a blow-off tube; 24. a first tee; 25. filling valves on the arrows; 26. a ground liquid oxygen precooling discharge valve;

3. a ground liquid oxygen pipeline structure; 31. an liquid oxygen tank car; 32. filling a ball valve; 33. a connecting conduit; 34. a second tee; 35. a third tee; 36. a liquid oxygen flow regulating solenoid valve; 37. connecting a tee joint; 38. a cooling conduit; 39. the nitrogen of the ground liquid blows off the air source; 310. blowing off the input conduit; 311. a gas manual switch; 312. the nitrogen in the pipeline blows off the adapter;

4. a liquid nitrogen cooling structure; 41. a liquid nitrogen tank car; 42. a liquid nitrogen flow guide pipe; 43. a peroxy cooler; 44. a liquid nitrogen flow regulating electromagnetic valve; 45. a liquid nitrogen flow controller; 46. a liquid nitrogen flowmeter;

5. a liquid oxygen filling flow meter;

6. a fill controller;

7. a liquid oxygen temperature sensor;

8. a liquid oxygen pressure sensor;

9. a liquid nitrogen temperature sensor;

10. a liquid nitrogen pressure sensor;

11. a ground liquid oxygen filling valve;

12. a liquid oxygen filter;

13. an oxygen box exhaust valve;

14. an oxygen box safety valve;

15. and a liquid level sensor in the oxygen box.

Detailed Description

Features and exemplary embodiments of various aspects of the utility model are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the utility model by showing examples of the utility model. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order not to unnecessarily obscure the present utility model; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As shown in fig. 1 to 4, a rocket supercooled liquid oxygen high-flow filling system comprises a liquid oxygen tank 1 arranged on an rocket body, a filling and blowing-off structure 2 communicated with the liquid oxygen tank 1, and a plurality of ground liquid oxygen pipeline structures 3 with the same structure, wherein the ground liquid oxygen pipeline structures 3 are connected with the input ends of the filling and blowing-off structure 2; in this embodiment, the liquid oxygen tank 1 is provided with an oxygen tank exhaust valve 13 and an oxygen tank safety valve 14, and an oxygen tank internal liquid level sensor 15 is provided in the liquid oxygen tank 1, which are conventional structures in the prior art, and therefore are not described in detail, but simply applied. In the practical application process, the number of the ground liquid oxygen pipeline structures 3 can be three, and the cold liquid oxygen filling is performed through the three paths of the same ground liquid oxygen pipeline structures 3 which are connected in parallel, so that the total filling flow of the supercooled liquid oxygen is improved and the filling efficiency is improved under the condition that the supercooled temperature of the liquid oxygen is unchanged.

As shown in fig. 2, in the practical application process, the filling and blowing-off structure 2 includes an input pipe 21, a connecting pipe 22, a blowing-off pipe 23, a first tee 24, an on-arrow filling valve 25, and a ground liquid oxygen precooling discharge valve 26; in the connection process, the connecting pipe 22 and the blowing pipe 23 are connected to the output end of the input pipe 21 through a first tee 24; the connecting pipe 22 is connected with the liquid oxygen tank 1 of the rocket body, and the rocket-mounted filling valve 25 is positioned between the connecting pipe 22 and the liquid oxygen tank 1 of the rocket body; a ground liquid oxygen precooling discharge valve 26 is fixed on the blow-off pipe 23; the input end of the input pipe 21 is connected with the ground liquid oxygen pipeline structure 3. As shown in fig. 1, a ground liquid oxygen filling valve 11 is provided between the input pipe 21 and the first tee 24. Filling control regulation can be performed by the surface liquid oxygen filling valve 11.

In the practical application process, nitrogen blowing operation is required to be performed on the ground filling system for 30 minutes before liquid oxygen filling, when the blowing operation is performed, the on-arrow filling valve 25 is closed, the ground liquid oxygen precooling discharge valve 26 is opened, meanwhile, the ground liquid nitrogen gas blowing air source 39 is opened, liquid nitrogen gas of the ground liquid nitrogen gas blowing air source 39 passes through the ground liquid oxygen pipeline structure 3 and is discharged from the ground liquid oxygen precooling discharge valve 26, so that the blowing operation is realized, and after the blowing operation is finished, the ground liquid oxygen precooling discharge valve 26 is closed.

As shown in fig. 1, in this embodiment, the ground liquid oxygen pipeline structure 3 includes a plurality of liquid oxygen tank cars 31, a plurality of filling ball valves 32, a connecting conduit 33, a second tee 34, a third tee 35, a plurality of liquid oxygen flow regulating solenoid valves 36, a plurality of connecting tee 37, a cooling conduit 38 and a plurality of liquid nitrogen cooling structures 4; in this embodiment, the number of the liquid oxygen tank cars 31 is two, and meanwhile, the number of the filling ball valves 32 is matched with and in one-to-one correspondence with the number of the liquid oxygen tank cars 31, the number of the liquid oxygen flow regulating electromagnetic valves 36 can be set according to the needs, mainly used for controlling the flow regulation of the liquid oxygen, and the cooling conduit 38 is in a wavy arrangement. In this embodiment, the number of the liquid nitrogen cooling structures 4 is three, so that three liquid oxygen supercooling operations can be realized, and the cold temperature of the liquid oxygen can be kept unchanged.

When in installation, the filling ball valves 32 are in one-to-one correspondence with the liquid oxygen tank vehicles 31, and the filling ball valves 32 are connected to the output ends of the liquid oxygen tank vehicles 31; the output end of the filling ball valve 32 is connected with the input end of the connecting conduit 33 through a second tee 34; the output end of the connecting conduit 33 is connected with the input end of the input pipe 21 through a third tee 35; both ends of the cooling conduit 38 are respectively communicated with the connecting conduit 33 through a connecting tee 37; the liquid nitrogen cooling structure 4 is matched with the cooling conduit 38 to realize cooling; the liquid oxygen flow regulating solenoid valve 36 is connected to the input end of the cooling conduit 38 and the connecting conduit 33, and the liquid oxygen flow regulating solenoid valve 36 on the connecting conduit 33 is located between the connecting tees 37 on both ends of the cooling conduit 38. In the practical application process, in order to improve the quality of liquid oxygen filling, the middle part of the input pipe 21 and the output end of the filling ball valve 32 are both provided with a liquid oxygen filter 12. Action of liquid oxygen filter 12: the impurities in the liquid oxygen are removed, and the problems of clamping stagnation, non-closing and the like of the valve caused by excessive residues in the liquid oxygen are prevented.

As shown in fig. 1 and 3, in the practical application process, the liquid nitrogen cooling structure 4 includes a liquid nitrogen tank car 41, a liquid nitrogen guide pipe 42, a peroxy cooler 43, a liquid nitrogen flow regulating electromagnetic valve 44, a liquid nitrogen flow controller 45 and a liquid nitrogen flow meter 46; the peroxy cooler 43 is mainly used for cooling the liquid oxygen passing through the cooling conduit 38.

When in connection, the liquid nitrogen tank wagon 41 is connected with the input end of the peroxy cooler 43 through a liquid nitrogen guide pipe 42; the liquid nitrogen flow regulating electromagnetic valve 44 and the liquid nitrogen flow meter 46 are connected in series between the liquid nitrogen tank car 41 and the peroxy cooler 43, the liquid nitrogen flow meter 46 is connected with the liquid nitrogen flow regulating electromagnetic valve 44 through a liquid nitrogen flow controller 45, and the liquid nitrogen flow meter 46 realizes the regulation of the liquid nitrogen flow regulating electromagnetic valve 44 through the liquid nitrogen flow controller 45; the cooling conduit 38 passes in waves through the peroxygen cooler 43. The cooling conduit 38 is wavy, which is favorable for increasing the cooling contact area and improving the cooling effect, the liquid nitrogen flowmeter 46 is used for detecting the flow of liquid nitrogen, transmitting the detected flow data of the liquid nitrogen to the liquid nitrogen flow controller 45, and realizing the regulation and control of the liquid nitrogen flow regulating electromagnetic valve 44 through the liquid nitrogen flow controller 45 so as to realize the flow control and regulation of the liquid nitrogen.

As shown in fig. 1, in the practical application process, a liquid oxygen filling flow meter 5 and a filling controller 6 are disposed between the output end of the connecting conduit 33 and the third tee 35, the liquid oxygen filling flow meter 5 is respectively connected with a liquid oxygen flow regulating electromagnetic valve 36 through the filling controller 6, and the liquid oxygen filling flow meter 5 realizes the regulation of the liquid oxygen flow regulating electromagnetic valve 36 through the filling controller 6. The liquid oxygen flow is detected by the liquid oxygen filling flowmeter 5, and meanwhile, the adjustment control operation of the liquid oxygen flow adjusting electromagnetic valve 36 is realized by the filling controller 6, so that the accuracy of flow control is improved.

As shown in fig. 1 and 4, the ground liquid oxygen pipeline structure 3 further comprises a ground liquid nitrogen gas blowing-off gas source 39, a blowing-off input conduit 310, a gas manual switch 311 and a plurality of pipeline nitrogen gas blowing-off adapter joints 312; the structure is mainly used for blowing off and supplying air before filling liquid oxygen so as to realize blowing off operation, and is mainly matched with the ground liquid oxygen precooling discharge valve 26 to finish the blowing off operation.

During installation, the output end of the ground liquid nitrogen blowing air source 39 is connected with a blowing input conduit 310, and an air manual switch 311 is arranged on the blowing input conduit 310, and the output end of the blowing input conduit 310 is connected to a pipeline between the liquid oxygen tank car 31 and the filling ball valve 32 through a pipeline nitrogen blowing adapter 312. Switching between the pipeline nitrogen purging adapter 312 and the liquid oxygen tank car 31 can be achieved, thereby achieving purging and liquid oxygen filling control operations.

As shown in fig. 1, in the practical application process, the liquid oxygen temperature sensor 7 and the liquid oxygen pressure sensor 8 are disposed on the connecting conduit 33, so as to detect the temperature and pressure of the liquid oxygen in real time.

As shown in fig. 1 and 3, the liquid nitrogen temperature sensor 9 and the liquid nitrogen pressure sensor 10 are arranged on the liquid nitrogen guide pipe 42, so that the temperature and pressure conditions of liquid nitrogen in the pipeline can be detected in real time.

The liquid nitrogen temperature sensor 9 and the liquid nitrogen pressure sensor 10 are used for measuring the temperature and the pressure of liquid nitrogen, a filling person can make a next decision on the temperature, if the temperature is low, the design requirement is met, if the temperature is high, the liquid oxygen is not cooled sufficiently, the liquid nitrogen source is unqualified, and the liquid nitrogen tank car 41 may need to be directly replaced.

The liquid oxygen pressure sensor 8 and the liquid nitrogen pressure sensor 10 are used for preventing the pipeline from being exploded, the conveying pipe is basically a large-caliber pipeline, and the bearing pressure of the large-caliber pipeline is lower, so that the installation of the liquid oxygen pressure sensor 8 and the liquid nitrogen pressure sensor 10 is beneficial to the observation of whether the specific value of the pressure of the liquid oxygen in the pipeline is within the design pressure of the pipeline or not, and the pipeline is broken due to the fact that the continuous filling is carried out when the pressure exceeds the standard is avoided, so that the liquid oxygen pressure sensor 8 and the liquid nitrogen pressure sensor 10 are used for judging whether the design values of the liquid oxygen and the liquid nitrogen are within the design value of the pipeline or not. This is a safety issue, and if the filling is continued below the design value, it may be that a valve is throttled above the design value, and the filling process is terminated immediately, or the liquid oxygen filling flow is reduced.

In some embodiments, the liquid oxygen temperature sensor 7, the liquid oxygen pressure sensor 8 send the collected data to the liquid oxygen flow regulating solenoid valve 36; the liquid nitrogen temperature sensor 9 and the liquid nitrogen pressure sensor 10 send collected data to the liquid nitrogen flow regulating electromagnetic valve 44, when the temperature is higher than the preset temperature, the opening of the liquid nitrogen flow regulating electromagnetic valve 44 is increased, the liquid nitrogen flow is improved, more liquid nitrogen exchanges heat with liquid oxygen, and the temperature of the liquid oxygen can be reduced to a rated value. If the liquid oxygen temperature is less than the preset temperature, the opening of the liquid nitrogen flow regulating electromagnetic valve 44 is reduced, the liquid nitrogen flow is reduced, less liquid nitrogen exchanges heat with the liquid oxygen, and the temperature of the liquid oxygen can be increased to the rated value.

The working principle is briefly described as follows:

the blowing-off process before liquid oxygen filling:

a) Nitrogen purging of the surface filling system is required for 30min before liquid oxygen filling.

b) In the blowing-off process of the ground filling system, the filling ball valve 32 is opened, then the liquid oxygen flow regulating electromagnetic valve 36 on the connecting conduit 33 is opened, the ground liquid oxygen filling valve 11 is opened, and the ground liquid oxygen precooling discharge valve 26 is opened. The on-arrow fill valve 25 is closed and the liquid oxygen flow regulating solenoid valve 36 on the cooling conduit 38 is closed. And finally, opening a gas manual switch 311 to blow out nitrogen of the ground filling system, and finishing the blowing-out for 30 minutes. Closing all valves on the ground.

c) During the blowing-off process of the ground filling system, the filling ball valve 32 is opened, then the liquid oxygen flow regulating electromagnetic valve 36 on the cooling conduit 38 is opened, the ground liquid oxygen filling valve 11 is opened, and the ground liquid oxygen precooling discharge valve 26 is opened. The liquid oxygen flow regulating solenoid valve 36 on the connecting conduit 33 is closed. And finally, opening a gas manual switch 311 to blow out nitrogen of the ground filling system, and finishing the blowing-out for 30 minutes. Closing all valves on the ground.

The precooling process of the ground liquid oxygen pipeline comprises the following steps:

d) And (5) precooling the ground pipeline after nitrogen in the liquid oxygen ground filling system is blown off.

e) The gas manual switch 311 is closed, the filling ball valve 32 is opened firstly, then all the liquid oxygen flow regulating electromagnetic valves 36 are opened, the ground liquid oxygen filling valve 11 is opened, the ground liquid oxygen precooling discharge valve 26 is opened, the on-arrow filling valve 25 is closed, and the liquid oxygen in the liquid oxygen tank car 31 is utilized for carrying out pipeline precooling on the ground liquid oxygen pipeline. The precooling of the ground liquid oxygen pipeline is finished for 60 minutes,

closing all valves on the ground.

The precooling flow of the ground liquid nitrogen pipeline comprises the following steps:

f) The precooling process of the ground liquid oxygen pipeline and the precooling of the ground liquid nitrogen pipeline are performed simultaneously.

g) The liquid nitrogen flow regulating solenoid valve 44 is opened, and the ground liquid nitrogen pipeline is pre-cooled by liquid nitrogen in the liquid nitrogen tank car 41. And (5) after the ground liquid nitrogen pipeline precooling is finished for 60min, closing all the valves on the ground.

Liquid oxygen small flow precooling filling flow:

h) And after the precooling of the ground liquid oxygen and liquid nitrogen pipelines is finished, the liquid oxygen low-flow precooling filling is immediately carried out.

i) Closing a gas manual switch 311, firstly opening a filling ball valve 32, then opening a liquid oxygen flow regulating electromagnetic valve 36 on a connecting conduit 33, closing the liquid oxygen flow regulating electromagnetic valve 36 on a cooling conduit 38, opening a ground liquid oxygen filling valve 11, closing a ground liquid oxygen precooling discharge valve 26, opening an on-arrow filling valve 25, opening an oxygen tank exhaust valve 13 during liquid oxygen filling, and carrying out low-flow precooling filling on an on-arrow oxygen tank by utilizing liquid oxygen in a liquid oxygen tank truck 31, wherein the precooling filling flow is controlled to be about 200L/min-300L/min, and the residual liquid oxygen required to be precooled to be filled into the oxygen tank is 3-3.5 m ³ And (3) left and right, the low-flow precooling filling lasts about 45 minutes, and after the low-flow precooling filling is finished, all valves on the ground are closed.

Liquid oxygen high-flow supercooling filling flow:

j) And (5) pre-cooling and filling the liquid oxygen with small flow, and immediately filling the liquid oxygen with large flow with supercooled liquid oxygen.

k) The gas manual switch 311 is closed, the filling ball valve 32 is opened firstly, then the liquid oxygen flow regulating electromagnetic valve 36 on the cooling conduit 38 is opened, the liquid oxygen flow regulating electromagnetic valve 36 on the connecting conduit 33 is closed, the ground liquid oxygen filling valve 11 is opened, the ground liquid oxygen precooling discharge valve 26 is closed, the on-arrow filling valve 25 is opened, the liquid nitrogen flow regulating electromagnetic valve 44 is opened, and liquid nitrogen serving as a cooling source is provided for the peroxy cooler 43 by the liquid nitrogen tank truck 41.

l) the flow rate of liquid nitrogen is regulated by regulating the liquid nitrogen flow rate regulating solenoid valve 44 so that the liquid oxygen is cooled to 82K through the peroxygen cooler 43.

m) the liquid oxygen tank car 31 sequentially carries out liquid oxygen first supercooling, second supercooling and third supercooling through a peroxy cooler 43 in three liquid nitrogen cooling structures after being filled with a ball valve 32, a liquid oxygen filter 12 and a liquid oxygen flow regulating electromagnetic valve 36; liquid oxygen is filled into the liquid oxygen tank 1 through the liquid oxygen filter 12, the ground liquid oxygen filling valve 11 and the arrow filling valve 25.

n) to reduce the temperature of the subcooled liquid oxygen, three identical peroxy coolers 43 are connected in series to subcool the liquid oxygen three times. The liquid oxygen temperature was reduced to 82K.

o) to increase the flow of supercooled liquid oxygen, three identical peroxygen coolers 43 are connected in series and then connected in parallel. The filling flow of the supercooled liquid oxygen is controlled to be about 5000L/min-6000L/min, so that the large-flow filling of the supercooled liquid oxygen is realized.

p) for a conventional oxygen tank (100.+ -.20 m) ³ ) All the supercooled liquid oxygen can be filled within 30min, the liquid oxygen filling time is reduced by a high-flow supercooled liquid oxygen filling mode, the temperature rise of the supercooled liquid oxygen in the filling period is also reduced, and the quality of the liquid oxygen propellant is improved by shortening the supercooled liquid oxygen filling time.

q) high-flow supercooled liquid oxygen filling starts at-35 min, the high-flow filling time lasts about 27 min-30 min, the pre-injection supplement of supercooled liquid oxygen is completed in-5 min to-3 min, the closing of all valves on the ground is completed in-3 min, and the falling off of the liquid oxygen filling connector is completed in-2 min.

And (3) a liquid oxygen filling system post-treatment flow:

r) after the rocket flies and the trial run is finished, carrying out a post-treatment flow on the liquid oxygen filling system under the condition of ensuring the safe discharge of the liquid oxygen.

s) firstly opening the filling ball valve 32, then opening the liquid oxygen flow regulating electromagnetic valve 36, opening the ground liquid oxygen filling valve 11, opening the ground liquid oxygen precooling discharge valve 26, opening the gas manual switch 311, and performing nitrogen blowing on the ground liquid oxygen filling pipeline by using the ground nitrogen source 39. Firstly, small-flow nitrogen is blown out for 10min, then the liquid oxygen tank car 31 is disconnected from a ground liquid oxygen filling pipeline, high-flow nitrogen is blown out for 30min, and after the blowing work is finished, a preservative film is used for plugging a ground filling pipeline interface, so that the ground filling pipeline interface is dustproof and waterproof and steam-proof.

t) when the ground liquid oxygen filling pipeline is processed, the liquid nitrogen tank car 41 is synchronously disconnected, the peroxy cooler 43 is subjected to liquid nitrogen discharge, and after the liquid nitrogen discharge is finished, a preservative film is used for plugging a ground liquid oxygen filling pipeline interface, so that the ground liquid oxygen filling pipeline is dustproof, waterproof and steam-proof.

Closing all valves, and finishing the post-treatment of the ground liquid oxygen filling system.

In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by "upper, lower, inner and outer", etc. in terms are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The terms "mounted, connected, and coupled" should be construed broadly in this disclosure unless otherwise specifically indicated and defined, such as: can be fixed connection, detachable connection or integral connection; it may also be a mechanical connection, an electrical connection, or a direct connection, or may be indirectly connected through an intermediate medium, or may be a communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

While the utility model has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. A rocket supercooled liquid oxygen high-flow filling system is characterized in that: the device comprises a liquid oxygen box (1) arranged on an arrow body, a filling and blowing-off structure (2) communicated with the liquid oxygen box (1), and a plurality of ground liquid oxygen pipeline structures (3) with the same structure, wherein the ground liquid oxygen pipeline structures are connected with the input ends of the filling and blowing-off structure (2);

the filling and blowing-off structure (2) comprises an input pipe (21), a connecting pipe (22), a blowing-off pipe (23), a first tee joint (24), an on-arrow filling valve (25) and a ground liquid oxygen precooling discharge valve (26);

the connecting pipe (22) and the blowing pipe (23) are connected to the output end of the input pipe (21) through the first tee joint (24);

the connecting pipe (22) is connected with the liquid oxygen tank (1), and the on-arrow filling valve (25) is positioned between the connecting pipe (22) and the liquid oxygen tank (1);

the ground liquid oxygen precooling discharge valve (26) is fixed on the blowing pipe (23);

the input end of the input pipe (21) is connected with the ground liquid oxygen pipeline structure (3).

2. A rocket supercooled liquid oxygen high flow charging system as claimed in claim 1, wherein: the ground liquid oxygen pipeline structure (3) comprises a plurality of liquid oxygen tank cars (31), a plurality of filling ball valves (32), a connecting conduit (33), a second tee joint (34), a third tee joint (35), a plurality of liquid oxygen flow regulating electromagnetic valves (36), a plurality of connecting tee joints (37), a cooling conduit (38) and a plurality of liquid nitrogen cooling structures (4);

the filling ball valves (32) are in one-to-one correspondence with the liquid oxygen tank vehicles (31), and the filling ball valves (32) are connected to the output ends of the liquid oxygen tank vehicles (31);

the output end of the filling ball valve (32) is connected with the input end of the connecting conduit (33) through a second tee joint (34);

the output end of the connecting conduit (33) is connected with the input end of the input pipe (21) through a third tee joint (35);

both ends of the cooling conduit (38) are respectively communicated with the connecting conduit (33) through a connecting tee joint (37);

the liquid nitrogen cooling structure (4) is matched with the cooling conduit (38) to realize cooling;

the liquid oxygen flow regulating electromagnetic valve (36) is connected to the input end of the cooling duct (38) and the connecting duct (33), and the liquid oxygen flow regulating electromagnetic valve (36) positioned on the connecting duct (33) is positioned between the connecting tee joints (37) at two ends of the cooling duct (38).

3. A rocket supercooled liquid oxygen high flow charging system as claimed in claim 2, wherein: the liquid nitrogen cooling structure (4) comprises a liquid nitrogen tank car (41), a liquid nitrogen guide pipe (42), a peroxy cooler (43), a liquid nitrogen flow regulating electromagnetic valve (44), a liquid nitrogen flow controller (45) and a liquid nitrogen flowmeter (46);

the liquid nitrogen tank wagon (41) is connected with the input end of the peroxy cooler (43) through a liquid nitrogen guide pipe (42);

the liquid nitrogen flow regulating electromagnetic valve (44) and the liquid nitrogen flow meter (46) are connected in series between the liquid nitrogen tank car (41) and the peroxy cooler (43), the liquid nitrogen flow meter (46) is connected with the liquid nitrogen flow regulating electromagnetic valve (44) through a liquid nitrogen flow controller (45), and the liquid nitrogen flow meter (46) realizes the regulation of the liquid nitrogen flow regulating electromagnetic valve (44) through the liquid nitrogen flow controller (45);

the cooling conduit (38) passes in a wave-like manner through the peroxygen cooler (43).

4. A rocket supercooled liquid oxygen high flow charging system as claimed in claim 2 or claim 3, wherein: a liquid oxygen filling flow meter (5) and a filling controller (6) are arranged between the output end of the connecting conduit (33) and the third tee joint (35), the liquid oxygen filling flow meter (5) is respectively connected with a plurality of liquid oxygen flow regulating electromagnetic valves (36) through the filling controller (6), and the liquid oxygen filling flow meter (5) realizes the regulation of the liquid oxygen flow regulating electromagnetic valves (36) through the filling controller (6).

5. A rocket supercooled liquid oxygen high flow charging system as claimed in claim 4, wherein: the ground liquid oxygen pipeline structure (3) further comprises a ground liquid nitrogen blowing air source (39), a blowing input conduit (310), a gas manual switch (311) and a plurality of pipeline nitrogen blowing adapter (312);

the output end of the ground liquid nitrogen blowing air source (39) is connected with the blowing input conduit (310), the gas manual switch (311) is arranged on the blowing input conduit (310), and the output end of the blowing input conduit (310) is connected to a pipeline between the liquid oxygen tank car (31) and the filling ball valve (32) through a pipeline nitrogen blowing adapter (312).

6. A rocket supercooled liquid oxygen high-flow charging system as claimed in claim 5, wherein: the connecting conduit (33) is provided with a liquid oxygen temperature sensor (7) and a liquid oxygen pressure sensor (8).

7. A rocket supercooled liquid oxygen high flow charging system as claimed in claim 3, wherein: the liquid nitrogen flow guide pipe (42) is provided with a liquid nitrogen temperature sensor (9) and a liquid nitrogen pressure sensor (10).

8. A rocket supercooled liquid oxygen high flow charging system according to any one of claims 1 to 3, wherein: a ground liquid oxygen filling valve (11) is arranged between the input pipe (21) and the first tee joint (24).

9. A rocket supercooled liquid oxygen high flow charging system as claimed in claim 3, wherein: the middle part of the input pipe (21) and the output end of the filling ball valve (32) are both provided with a liquid oxygen filter (12).

10. A rocket supercooled liquid oxygen high flow charging system as claimed in claim 3, wherein: the number of the ground liquid oxygen pipeline structures (3) is three; the number of the liquid nitrogen cooling structures (4) is three.