A high-temperature and high-pressure gas reversing valve, a gas supply system and method

Abstract

This invention discloses a high-temperature, high-pressure gas reversing valve, belonging to the field of energy and power technology. It includes a housing component, a piston component, and an ignition cartridge. One end of the housing component has a pressure inlet for connection to a high-temperature gas supply system, and the other end has a medium-temperature gas inlet and a medium-temperature gas outlet. The medium-temperature gas inlet is used for connection to a medium-temperature gas supply system. An annular baffle is located in the middle of the housing component. The piston component passes through the annular baffle and is axially disposed within the housing component, with a sealing end and a piston end at its two ends. The ignition cartridge is located on the side of the housing component, forming an inflation chamber between the piston end and the annular baffle, and this inflation chamber communicates with the gas outlet of the ignition cartridge. This invention also discloses a gas supply system and method using this reversing valve. This invention enables the independent, time-sharing, and sequential operation of the medium-temperature and high-temperature gas supply systems without introducing an external gas pressure control circuit.

Description

Technical Field

[0001] This invention belongs to the field of energy and power technology, specifically relating to a high-temperature and high-pressure gas reversing valve, a gas supply system, and a method. Background Technology

[0002] In the fields of engine thrust vector control and final stage attitude control, in order to meet the complex attitude control function requirements of the aircraft system, the long action time span, the complex control force output mode, the no obvious pattern of action time, and the high total impulse energy requirements, a hybrid medium of medium-temperature gas supply system and high-temperature gas supply system is preferred as the power medium of the actuator. When the functional demand is large, the high-temperature gas supply system provides power, and when the functional demand is small, the medium-temperature gas supply system provides power. The two power medium systems work independently in time and sequence and do not affect each other during operation.

[0003] Therefore, designing a high-temperature and high-pressure gas reversing valve that can meet the requirements of two power medium systems working independently in different times and sequences without affecting each other during operation is a problem that urgently needs to be solved by technicians in this field.

[0004] Directional control valves come in a wide variety of types, structures, and control methods. Traditional pneumatic control directional control valves rely on external pneumatic signals to power the switching of the main valve, controlling the circuit to switch or open / close. This approach presents the following problems in use:

[0005] (1) It cannot work for a long time under high temperature and high pressure conditions, such as working temperature of 1100℃, working pressure of 5MPa, and working time of 100s;

[0006] (2) It cannot meet the requirement of controllable and independent output of high-temperature gas for a long time (such as 15 minutes);

[0007] (3) An external air pressure control circuit is required, which is relatively complex in structure, large in size, high in cost and low in reliability. Summary of the Invention

[0008] In response to one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides a high-temperature and high-pressure gas reversing valve, a gas supply system and method, which can realize the time-sharing and sequential independent operation of the medium-temperature gas supply system and the high-temperature gas supply system without introducing an external gas pressure control circuit.

[0009] To achieve the above objectives, according to a first aspect of the present invention, a high-temperature and high-pressure gas reversing valve is provided, comprising a housing component, a piston component, and an ignition cartridge;

[0010] One end of the housing component is provided with a pressure inlet for connection to a high-temperature gas supply system, and the other end is provided with a medium-temperature gas inlet and a medium-temperature gas outlet. The medium-temperature gas inlet is used for connection to a medium-temperature gas supply system, and an annular baffle is provided in the middle of the housing component.

[0011] The piston component passes through the annular baffle and is axially disposed within the housing component. The piston component has a sealing end and a piston end at its two ends, respectively. The sealing end is located on the side of the annular baffle away from the pressure inlet, and is used to seal or connect the medium-temperature gas inlet and the medium-temperature gas outlet. The piston end is located on the side of the annular baffle closer to the pressure inlet. A spring is provided between the piston end and the end of the housing component where the pressure inlet is located, and a limiting ring is provided on the inner side of the spring.

[0012] The ignition cartridge is located on the side of the housing component, and an inflation chamber is formed between the piston end and the annular baffle, and the inflation chamber is connected to the air outlet of the ignition cartridge.

[0013] As a further improvement of the present invention, the housing component includes a first housing, a second housing, and a third housing that are sequentially threaded together along the axial direction;

[0014] The piston assembly includes a piston rod and a seal. The seal is located at one end of the piston rod near the third housing, and the contact surface between the third housing and the seal is provided with several sealing grooves.

[0015] As a further improvement of the present invention, the pressure-bearing area of ​​the piston end of the piston component is greater than the pressure-bearing area of ​​the sealing end.

[0016] As a further improvement of the present invention, the ignition box includes a box body, an aluminum foil sheet, an ignition pellet, and an electric detonator; the ignition pellet is disposed in the box body, the aluminum foil sheet is disposed on the side of the ignition pellet closer to the housing component, and the electric detonator is disposed on the side of the ignition pellet away from the housing component.

[0017] According to a second aspect of the present invention, a gas supply system is provided, employing the aforementioned high-temperature and high-pressure gas reversing valve, comprising a high-temperature gas supply system and a medium-temperature gas supply system, a gas collecting ring, a jetting unit, and the reversing valve;

[0018] The pressure inlet of the reversing valve is connected to the high-temperature gas supply system via a pressure inlet pipe, and the high-temperature gas supply system is connected to the gas collecting ring via a composite pipeline; the medium-temperature gas inlet of the reversing valve is connected to the medium-temperature gas supply system, and the medium-temperature gas outlet of the reversing valve is connected to the gas collecting ring via a pipeline; the gas collecting ring is provided with a plurality of jetting units along its circumferential direction for injecting high-temperature gas from the high-temperature gas supply system or medium-temperature gas from the medium-temperature gas supply system.

[0019] As a further improvement of the present invention, the working condition of the medium-temperature gas supply system is: the piston end pressure F1 of the piston component is less than the sealing end pressure F2;

[0020] Where F1 is the spring force of the compression spring, and F2 is the pressure exerted by the medium-temperature gas supply system on the sealed end of the piston component; or, F1 is the sum of the spring force of the compression spring and the pressure exerted by the internal pressure of the high-temperature gas supply system on the piston end of the piston component, and F2 is the sum of the pressure exerted by the medium-temperature gas supply system on the sealed end of the piston component and the pressure exerted by the inflation chamber pressure of the ignition cartridge on the sealed end of the piston component.

[0021] As a further improvement of the present invention, the working condition of the high-temperature gas supply system is: the piston end pressure F1 of the piston component is greater than the sealing end pressure F2;

[0022] Where F1 is the sum of the spring force of the compression spring and the pressure exerted on the piston end of the piston component by the internal pressure of the high-temperature gas supply system cavity, and F2 is the pressure exerted on the sealing end of the piston component by the pressure of the medium-temperature gas supply system cavity; or, F1 is the sum of the spring force of the compression spring and the pressure exerted on the piston end of the piston component by the internal pressure of the high-temperature gas supply system cavity, and F2 is 0.

[0023] As a further improvement of the present invention, the jet unit includes a high-temperature thruster and a high-temperature nozzle. One end of the high-temperature thruster is connected to the gas collecting ring through a pipe, and the other end is connected to the high-temperature nozzle. The high-temperature gas or medium-temperature gas entering the gas collecting ring passes through the high-temperature thruster and is ejected from the high-temperature nozzle to generate thrust.

[0024] As a further improvement of the present invention, the reversing valve, the medium-temperature gas supply system, the high-temperature gas supply system, the gas collecting ring, and the high-temperature thruster are all fixed to the bottom cover plate by corresponding fasteners.

[0025] According to a third aspect of the present invention, a gas supply method for a gas supply system is provided. The gas supply system is used, and the total working time is set to T3s. The high-temperature gas supply is set at the initial time period, the middle time period, or the end time period. The initial position of the piston component is that it is in a state of blocking the passage between the medium-temperature gas inlet and the medium-temperature gas outlet under the action of the spring.

[0026] When the high-temperature gas supply is scheduled for the middle time period, the gas supply method is as follows:

[0027] 1) During the time period from 0s to T1s: gas is supplied by the medium-temperature gas supply system.

[0028] When the medium-temperature gas supply system is ignited, it generates medium-temperature high-pressure gas. When the high-temperature gas supply system is not working, the piston end pressure F1 of the piston component is less than the sealing end pressure F2. The piston component moves towards the pressure inlet until it contacts the limit ring. At this time, the medium-temperature gas supply system is connected to the gas collecting ring, and the gas is supplied by the medium-temperature gas supply system.

[0029] 2) During the T1s~T2s time period: gas is supplied by the high-temperature gas supply system.

[0030] At time T1s, the high-temperature gas supply system ignites and generates high-temperature and high-pressure gas. The piston end pressure F1 of the piston component is greater than the sealing end pressure F2. The piston component moves away from the pressure inlet until it blocks the passage between the medium-temperature gas inlet and the medium-temperature gas outlet. The high-temperature gas supply system is connected to the gas collecting ring and is supplied with gas by the high-temperature gas supply system.

[0031] 3) During the time period T2s~T3s, gas is supplied by the medium-temperature gas supply system;

[0032] At time T2s, the ignition box generates high-pressure gas. The piston end pressure F1 is less than the sealing end pressure F2. The piston moves towards the pressure inlet until it contacts the limiting ring. At this time, the medium-temperature gas supply system is connected to the gas collecting ring, and the medium-temperature gas supply system supplies gas.

[0033] When the high-temperature gas supply is set during the initial time period, the gas supply method is as follows:

[0034] 1) 0s~T1 ＇ s time period: Gas is supplied by the high-temperature gas supply system;

[0035] When the high-temperature gas supply system is ignited, it generates high-temperature and high-pressure gas. When the medium-temperature gas supply system is not working, the piston end pressure F1 of the piston component is greater than the sealing end pressure F2. The piston component is always in a state of blocking the passage between the medium-temperature gas inlet and the medium-temperature gas outlet. At this time, the high-temperature gas supply system is connected to the gas collecting ring and the high-temperature gas supply system is working to supply gas.

[0036] 2) T1 ＇ During the time period from s to T3s, gas is supplied by the medium-temperature gas supply system.

[0037] T1 ＇ At time s, the high-temperature gas supply system finishes working, the ignition box generates high-pressure gas, the piston end pressure F1 of the piston component is less than the sealing end pressure F2, the piston component moves towards the pressure inlet to contact the limit ring, at this time the medium-temperature gas supply system is connected to the gas collecting ring, and gas is supplied by the medium-temperature gas supply system.

[0038] When the high-temperature gas supply is scheduled for the end of the time period, the gas supply method is as follows:

[0039] 1) 0s~T2 ＇ s time period: Gas is supplied by the medium-temperature gas supply system;

[0040] When the medium-temperature gas supply system is ignited, it generates medium-temperature high-pressure gas. When the high-temperature gas supply system is not working, the piston end pressure F1 of the piston component is less than the sealing end pressure F2. The piston component moves towards the pressure inlet until it contacts the limit ring. At this time, the medium-temperature gas supply system is connected to the gas collecting ring, and the gas is supplied by the medium-temperature gas supply system.

[0041] 2) T2 ＇ During the time period from s to T3s, gas is supplied by the high-temperature gas supply system.

[0042] T2 ＇ At time s, the high-temperature gas supply system ignites and generates high-temperature and high-pressure gas. The piston end pressure F1 of the piston component is greater than the sealing end pressure F2. The piston component moves away from the pressure inlet until it blocks the passage between the medium-temperature gas inlet and the medium-temperature gas outlet. At this time, the high-temperature gas supply system is connected to the gas collecting ring and the high-temperature gas supply system works to supply gas.

[0043] In summary, the technical solutions conceived by this invention have the following beneficial effects compared with the prior art:

[0044] (1) The high temperature and high pressure gas reversing valve of the present invention can realize the independent operation of the medium temperature gas supply system and the high temperature gas supply system without introducing an external gas pressure control circuit. They do not affect each other during operation and can reliably switch under long-term high temperature and high pressure conditions. It solves the difficulty of complex gas supply demand of the system and has the characteristics of simple structure, fast response speed, high integration and flexible application expansion.

[0045] (2) The gas supply system of the present invention isolates the high-temperature gas supply system from the medium-temperature gas supply system through a reversing valve, thereby eliminating the influence of the high-temperature gas supply system on the medium-temperature gas supply system. The medium-temperature gas supply system generates medium-temperature high-pressure gas, which flows through the reversing valve and is guided by the gas collecting ring into the high-temperature thruster and high-temperature nozzle, and then outputs gas to generate thrust. The high-temperature gas supply system generates high-temperature high-pressure gas, which closes the reversing valve and is guided by the gas collecting ring into the high-temperature thruster and high-temperature nozzle, and then outputs gas to generate thrust. The present invention can reliably switch under long-term, high-temperature and high-pressure conditions, and can avoid the use of high-temperature valves and high-temperature resistant materials in the medium-temperature gas supply system, greatly reducing the system cost. In addition, the two gas supply systems can share components such as the gas collecting ring, high-temperature thruster and high-temperature nozzle, with high integration and significant weight reduction effect.

[0046] (3) The gas supply method of the present invention can output gas and generate thrust in a time-sharing, orderly and controllable manner through two gas supply systems. Through parameter matching, it can be applied to various working times, working temperatures and working pressures of gas reversal conditions, and has a wide range of applications. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the gas supply system structure according to an embodiment of the present invention;

[0048] Figure 2 This is a schematic diagram of the high-temperature and high-pressure gas reversing valve structure according to an embodiment of the present invention;

[0049] Figure 3 This is a schematic diagram of the gas supply system of the high-temperature and high-pressure gas reversing valve in an embodiment of the present invention.

[0050] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. reversing valve; 2. bottom cover plate; 3. high-temperature gas supply system; 4. pressure tapping pipe; 5. composite pipeline; 6. gas collecting ring; 7. high-temperature thruster; 8. high-temperature nozzle; 9. fastener;

[0051] 11. First housing; 12. Second housing; 13. Third housing; 14. Piston rod; 15. Seal; 16. Spring; 17. First sealing ring; 18. Ignition powder box; 19. Sealing groove;

[0052] 181. Container body; 182. Aluminum foil sheet; 183. Ignition tablet; 184. Copper gasket; 185. Electric detonator; 186. Second sealing ring. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] As a preferred embodiment of the present invention, such as Figures 1 to 3As shown, the gas supply system of this embodiment includes a reversing valve 1, a high-temperature gas supply system 3, a medium-temperature gas supply system, a gas collecting ring 6, and jet units. The reversing valve 1 has a pressure inlet at one end and a medium-temperature gas inlet and outlet at the other end. The pressure inlet is connected to the high-temperature gas supply system 3 via a pressure pipe 4, while the high-temperature gas supply system 3 is connected to the gas collecting ring 6 via a composite pipeline 5. The medium-temperature gas inlet is connected to the medium-temperature gas supply system (not shown in the figure), and the medium-temperature gas outlet is connected to the gas collecting ring 6 via a pipeline, thus physically isolating the high-temperature gas supply system and the medium-temperature gas supply system. The gas collecting ring 6 has several jet units arranged circumferentially, each jet unit opening outwards, for injecting high-temperature gas from the high-temperature gas supply system 3 or medium-temperature gas from the medium-temperature gas supply system.

[0059] Preferably, the high-temperature gas supply system 3 is connected to the composite pipeline 5 through a one-way valve, which can prevent medium-temperature gas from entering the high-temperature gas supply system 3 before the high-temperature gas supply system 3 starts working and during the operation of the medium-temperature gas system.

[0060] Preferably, the jet unit includes a high-temperature thruster 7 and a high-temperature nozzle 8. One end of the high-temperature thruster 7 is connected to the gas collecting ring 6 through a pipe, and the other end is connected to the high-temperature nozzle 8, with the high-temperature nozzle 8 opening outward. The high-temperature gas or medium-temperature gas entering the gas collecting ring 6 passes through the high-temperature thruster 7 and is ejected from the high-temperature nozzle 8 to generate thrust.

[0061] Preferably, the reversing valve 1, the medium-temperature gas supply system, the high-temperature gas supply system 3, the gas collecting ring 6, and the high-temperature thruster 7 are all fixed to the bottom cover plate 2 by corresponding fasteners 9.

[0062] Preferably, the composite pipeline 5 includes a metal pipeline shell with an insulation layer on its inner wall. Since high-temperature gas flows in the composite pipeline, the insulation layer can mitigate the impact of high temperature on the metal shell of the composite pipeline.

[0063] Preferably, the gas collecting ring 6 is formed by 3D printing of high-temperature alloy.

[0064] like Figure 2As shown, the reversing valve 1 of this embodiment includes a housing component, a piston component, and an ignition cartridge. One end of the housing component has a pressure inlet, and the other end has a medium-temperature gas inlet and a medium-temperature gas outlet. An annular baffle is provided in the middle of the housing component. The piston component passes through the annular baffle and is axially disposed within the housing component. The piston component has a sealing end and a piston end at its two ends, respectively. The sealing end is located on the side of the annular baffle away from the pressure inlet, used to seal or connect the medium-temperature gas inlet and the medium-temperature gas outlet. The piston end is located on the side of the annular baffle closer to the pressure inlet. Further, a spring 16 is provided between the piston end and the end of the housing component with the pressure inlet, and a limiting ring is provided inside the spring 16. The limiting ring provides radial limiting for the spring 16 and axial limiting for the piston component when it moves towards the pressure inlet. Further, an ignition cartridge 18 is disposed on the side of the housing component, and an inflation chamber is formed between the piston end of the piston component and the annular baffle, and this inflation chamber is connected to the gas outlet of the ignition cartridge 18.

[0065] Preferably, the housing component includes a first housing 11, a second housing 12, and a third housing 13 connected sequentially along the axial direction. The housings are preferably connected by threads and sealed by a first sealing ring 17 (such as an O-ring). The housing material is preferably stainless steel, and the material of the first sealing ring 17 is preferably perfluororubber, with an operating temperature not lower than 300°C.

[0066] Preferably, a first sealing ring 17 is provided between the piston end of the piston component and the housing component, and a first sealing ring 17 is also provided between the piston component and the annular baffle.

[0067] More specifically, one end of the first housing 11 is connected to the outside of the second housing 12, and the other end is a pressure inlet; one end of the third housing 13 is connected to the outside of the second housing 12, and the other end has a medium-temperature gas inlet and a medium-temperature gas outlet. The piston assembly includes a piston rod 14 and a seal 15. The seal 15 is located at the end of the piston rod 14 near the third housing 13, and the contact surface between the third housing and the seal 15 is provided with several sealing grooves 19, such as annular triangular grooves, so that the seal 15 and the housing assembly form multiple seals, making the seal more reliable; the material of the seal 15 is preferably 9621D or 824 flexible ablation-resistant material. An annular baffle is provided in the middle of the second housing 12, and the gas filling cavity formed by the piston rod 14 and the annular baffle is connected to the gas outlet of the ignition box 18 provided on the side of the second housing 12.

[0068] In the preferred embodiment, see again Figure 2The ignition cartridge includes a cartridge body 181, an aluminum foil sheet 182, an ignition pellet 183, and an electric detonator 185. The ignition pellet 183 is disposed within the cartridge body 181, the aluminum foil sheet 182 is disposed on the side of the ignition pellet 183 closest to the housing component, and the electric detonator 185 is disposed on the side of the ignition pellet 183 furthest from the housing component. The electric detonator 185 and the cartridge body 181 are sealed by a copper gasket 184, and the cartridge body 181 is sealed to the housing component by a second sealing ring 186 (such as an O-ring). More preferably, the second sealing ring 186 is made of fluorosilicone rubber and has an operating temperature not lower than 177°C. The operating temperature of the second sealing ring 186 can be lower than the operating temperature of the first sealing ring 17.

[0069] This invention also provides a gas supply method based on the above-mentioned gas supply system. The total working time is set to T3s. Depending on the actual situation, the high-temperature gas supply can be set at the beginning, middle, or end of the time period. In this embodiment, the medium-temperature gas supply system can generate medium-temperature high-pressure gas at 300℃ and P1=7MPa, with a gas supply time of not less than 15 minutes; the high-temperature gas supply system can generate high-temperature high-pressure gas at 1100℃ and P2=5MPa, with a gas supply time of not less than 100 seconds.

[0070] It should be noted that when not in operation, the spring is always in a compressed state, used to limit the displacement of the piston components, which helps ensure stability during transportation. Therefore, whether the high-temperature gas supply is set at the initial, middle, or end of the time period, the initial position of the piston components is as follows under the action of the spring force: Figure 2 As shown, the initial position of the piston component is that, under the action of the spring, it is in a state of blocking the passage between the medium-temperature gas inlet and the medium-temperature gas outlet.

[0071] When the high-temperature gas supply is scheduled for the middle time period, the gas supply method is as follows:

[0072] 1) During the time period from 0s to T1s: gas is supplied by the medium-temperature gas supply system.

[0073] At time 0s, the medium-temperature gas supply system ignites and generates medium-temperature high-pressure gas. The inlet pressure of the medium-temperature gas at the reversing valve 1 is the medium-temperature gas supply system pressure P1 (7MPa). The high-temperature gas supply system 3 is not working, and the pressure at the pressure port of the reversing valve 1 is P2 (0MPa). The pressure F1 at the upper end (piston end) of the piston component is less than the pressure F2 at the lower end (sealing end) (where F1 is the spring force of the compression spring, and F2 is the pressure exerted by the medium-temperature gas supply system pressure on the lower end of the piston component). The piston component moves to the limit position (contact with the limit ring) towards the pressure port. The structural diagram after the movement is in place is shown below. Figure 3As shown, at this time, the medium-temperature gas supply system is connected to the gas collecting ring 6. The medium-temperature high-pressure gas is guided by the gas collecting ring 6 into the high-temperature thruster 7 and the high-temperature nozzle 8, and then outputs gas to generate thrust.

[0074] 2) During the T1s~T2s time period: gas is supplied by the high-temperature gas supply system.

[0075] At time T1s, the high-temperature gas supply system 3 ignites and generates high-temperature, high-pressure gas. The pressure at the pressure inlet of the reversing valve 1 is equal to the internal pressure of the high-temperature gas supply system. The pressure F1 at the upper end of the piston component is greater than the pressure F2 at the lower end (F1 is the sum of the compression spring force and the pressure exerted on the upper end of the piston component by the internal pressure of the high-temperature gas supply system, and F2 is the pressure exerted on the lower end of the piston component by the pressure of the medium-temperature gas supply system). The piston component moves downward until it blocks the passage between the medium-temperature gas inlet and outlet. The structural diagram after the movement is complete is shown below. Figure 2 As shown, at this time, the piston assembly isolates the medium-temperature gas supply system from the high-temperature gas supply system 3. The high-temperature gas supply system 3 is connected to the gas collecting ring 6. The high-temperature and high-pressure gas is guided by the gas collecting ring 6 into the high-temperature thruster 7 and the high-temperature nozzle 8, and then outputs the gas to generate thrust.

[0076] It should be noted that when the high-temperature gas supply system 3 is working, since the gas collecting ring 6 and the medium-temperature gas outlet of the reversing valve 1 are connected, the medium-temperature gas outlet will be filled with high-temperature and high-pressure gas. However, the high-temperature and high-pressure gas in this area is in a static state, and the heat conduction effect is weak. Therefore, the reversing valve 1 is less affected by the heat of the gas.

[0077] 3) During the time period T2s~T3s, gas is supplied by the medium-temperature gas supply system;

[0078] At time T2s, the high-temperature gas supply system finishes operation. The electric initiator 185 inside the ignition box 18 ignites the ignition pellet 183, generating high-pressure gas. The pressure in the filling chamber connected to the ignition box 18 is P3 (10MPa), the pressure at the pressure inlet of the reversing valve 1 and the pressure at the upper end of the piston component are P2 (5MPa), and the pressure at the lower end of the piston component is P1 (7MPa). The pressure F1 at the upper end of the piston component is less than the pressure F2 at the lower end (F1 is the sum of the spring force of the compression spring and the pressure exerted on the upper end of the piston component by the high-temperature gas supply system chamber pressure; F2 is the sum of the pressure exerted on the lower end of the piston component by the medium-temperature gas supply system pressure and the pressure exerted on the lower end of the piston component by the filling chamber pressure of the ignition box). Under the pressure difference, the piston component moves towards the pressure inlet to its limit position (contacting the limit ring). The structural diagram after the movement is complete is shown below. Figure 3 As shown, at this time, the medium-temperature gas supply system is connected to the gas collecting ring 6. The medium-temperature high-pressure gas is guided by the gas collecting ring 6 into the high-temperature thruster 7 and the high-temperature nozzle 8, and then outputs gas to generate thrust.

[0079] After the high-temperature gas supply system finishes operating at time T2s, without the ignition box 18, all high-temperature thrusters 7 are shut down and do not operate. The pressure inside the entire cavity is the same as the medium-temperature gas supply system pressure P1. The piston component moves downward under the action of the pressure difference (the pressure at the upper and lower ends of the piston is the same, but the pressure-bearing area at the upper end of the piston is greater than that at the lower end, so the pressure at the upper end of the piston is greater than that at the lower end). After the high-temperature thruster 7 starts to exhaust, the pressure of the gas collecting ring 6 and the pressure inlet decreases, and the piston component moves upward under the action of the pressure difference. This causes the piston component to move up and down reciprocally, which can lead to problems such as untimely gas replenishment affecting the output of the high-temperature thruster 7. In this embodiment of the invention, by setting the ignition box 18, the pressure of the piston component moving towards the pressure inlet can be guaranteed, thereby ensuring the output of medium-temperature gas and not affecting the output of the high-temperature thruster.

[0080] When the high-temperature gas supply is set during the initial time period, the gas supply method is as follows:

[0081] 1) 0s~T1 ＇ s time period: Gas is supplied by the high-temperature gas supply system;

[0082] At time 0s, the high-temperature gas supply system ignites and generates high-temperature, high-pressure gas. The medium-temperature gas supply system is not operating. The pressure at the pressure inlet is equal to the internal pressure of the high-temperature gas supply system. The pressure F1 at the upper end of the piston assembly is greater than the pressure F2 at the lower end (F1 is the sum of the compression spring force and the pressure exerted on the upper end of the piston assembly by the internal pressure of the high-temperature gas supply system; F2 is 0). The piston assembly remains in a constant state. Figure 2 As shown in the diagram, the piston assembly isolates the medium-temperature gas supply system from the high-temperature gas supply system 3. The high-temperature gas supply system 3 is connected to the gas collecting ring 6. The high-temperature and high-pressure gas is guided by the gas collecting ring 6 into the high-temperature thruster 7 and the high-temperature nozzle 8, and then outputs the gas to generate thrust.

[0083] 2) T1 ＇ During the time period from s to T3s, gas is supplied by the medium-temperature gas supply system.

[0084] T1 ＇At time s, the high-temperature gas supply system finishes operation. The electric initiator 185 inside the ignition box 18 ignites the ignition pellet 183, generating high-pressure gas. The pressure at the inlet of the reversing valve and the pressure at the lower end of the piston assembly are equal to the pressure P1 of the medium-temperature gas supply system. The pressure at the pressure inlet of the reversing valve and the pressure at the upper end of the piston assembly are equal to P2. The pressure in the filling chamber connected to the ignition box 18 is P3. The pressure F1 at the upper end of the piston assembly is less than the pressure F2 at the lower end (F1 is the sum of the spring force of the compression spring and the pressure in the high-temperature gas supply system chamber acting on the upper end of the piston assembly; F2 is the sum of the pressure at the lower end of the piston assembly acting on the medium-temperature gas supply system and the pressure in the filling chamber of the ignition box acting on the lower end of the piston assembly). Under the pressure difference, the piston assembly moves upward until it contacts the limit ring. The structural diagram after the movement is complete is shown below. Figure 3 As shown, at this time, the medium-temperature gas supply system is connected to the gas collecting ring 6. The medium-temperature high-pressure gas is guided by the gas collecting ring 6 into the high-temperature thruster 7 and the high-temperature nozzle 8, and then outputs gas to generate thrust.

[0085] When the high-temperature gas supply is scheduled for the end of the time period, the gas supply method is as follows:

[0086] 1) 0s~T2 ＇ s time period: Gas is supplied by the medium-temperature gas supply system;

[0087] At time 0s, the medium-temperature gas supply system ignites and generates medium-temperature, high-pressure gas. The high-temperature gas supply system is not operating. The inlet pressure of the reversing valve is equal to the medium-temperature gas supply system pressure P1, and the pressure at the reversing valve's pressure port is P2. The upper pressure F1 of the piston assembly is less than the lower pressure F2 (F1 is the spring force, and F2 is the pressure exerted by the medium-temperature gas supply system pressure on the lower end of the piston assembly). The piston assembly moves upward to its limit position (contacting the limit ring). The structural diagram after the movement is complete is shown below. Figure 3 As shown, at this time, the medium-temperature gas supply system is connected to the gas collecting ring 6. The medium-temperature high-pressure gas is guided by the gas collecting ring 6 into the high-temperature thruster 7 and the high-temperature nozzle 8, and then outputs gas to generate thrust.

[0088] 2) T2 ＇ During the time period from s to T3s, gas is supplied by the high-temperature gas supply system.

[0089] T2 ＇ At time s, the high-temperature gas supply system ignites and generates high-temperature, high-pressure gas. The pressure at the pressure inlet is equal to the internal pressure of the high-temperature gas supply system cavity. The pressure F1 at the upper end of the piston component is greater than the pressure F2 at the lower end (F1 is the sum of the compression spring force and the pressure exerted on the upper end of the piston component by the internal pressure of the high-temperature gas supply system cavity, and F2 is the pressure exerted on the lower end of the piston component by the pressure of the medium-temperature gas supply system). The piston component moves downward until it blocks the medium-temperature gas inlet and outlet. The structural diagram after the movement is complete is shown below. Figure 2As shown, at this time, the piston assembly isolates the medium-temperature gas supply system from the high-temperature gas supply system. The high-temperature gas supply system 3 is connected to the gas collecting ring 6. The high-temperature and high-pressure gas is guided by the gas collecting ring 6 into the high-temperature thruster 7 and the high-temperature nozzle 8, and then outputs the gas to generate thrust.

[0090] It is understood that this invention does not specifically limit the spring force, the piston end of the piston component, and the pressure-bearing area of ​​the sealing ring, etc. The pressure P1 of the medium-temperature gas supply system, the pressure P2 of the high-temperature gas supply system, and the pressure P3 of the filling chamber connected to the ignition box are not limited to the values ​​in the specific embodiments described above. It is sufficient that the piston end pressure F1 of the piston component is less than the sealing end pressure F2 (the condition for the medium-temperature gas supply system to operate), or the piston end pressure F1 of the piston component is greater than the sealing end pressure F2 (the condition for the high-temperature gas supply system to operate). Furthermore, the high-temperature gas supply system and the medium-temperature gas supply system can utilize existing technologies, and their specific gas temperature and supply time can be adjusted according to actual needs. Therefore, this invention, through parameter matching, can be applied to various gas reversing conditions with different operating times, operating temperatures, and operating pressures.

[0091] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-temperature, high-pressure gas reversing valve, characterized in that, Includes housing components, piston components, and ignition cartridge; One end of the housing component is provided with a pressure inlet for connection to a high-temperature gas supply system, and the other end is provided with a medium-temperature gas inlet and a medium-temperature gas outlet. The medium-temperature gas inlet is used for connection to a medium-temperature gas supply system, and an annular baffle is provided in the middle of the housing component. The piston component passes through the annular baffle and is axially disposed within the housing component. The piston component has a sealing end and a piston end at its two ends, respectively. The sealing end is located on the side of the annular baffle away from the pressure inlet, and is used to seal or connect the medium-temperature gas inlet and the medium-temperature gas outlet. The piston end is located on the side of the annular baffle closer to the pressure inlet. A spring is provided between the piston end and the end of the housing component where the pressure inlet is located, and a limiting ring is provided on the inner side of the spring. The ignition cartridge is located on the side of the housing component, and an inflation chamber is formed between the piston end and the annular baffle, and the inflation chamber is connected to the air outlet of the ignition cartridge.

2. The high-temperature and high-pressure gas reversing valve according to claim 1, characterized in that, The housing component includes a first housing, a second housing, and a third housing that are sequentially threaded together along the axial direction; The piston assembly includes a piston rod and a seal. The seal is located at one end of the piston rod near the third housing, and the contact surface between the third housing and the seal is provided with several sealing grooves.

3. The high-temperature and high-pressure gas reversing valve according to claim 1, characterized in that, The pressure-bearing area at the piston end of the piston component is greater than the pressure-bearing area at the sealing end.

4. The high-temperature and high-pressure gas reversing valve according to any one of claims 1-3, characterized in that, The ignition cartridge includes a cartridge body, an aluminum foil sheet, an ignition pellet, and an electric detonator; the ignition pellet is disposed inside the cartridge body, the aluminum foil sheet is disposed on the side of the ignition pellet closer to the housing component, and the electric detonator is disposed on the side of the ignition pellet away from the housing component.

5. A gas supply system, employing the high-temperature, high-pressure gas reversing valve according to any one of claims 1-4, characterized in that, Includes a high-temperature gas supply system and a medium-temperature gas supply system, a gas collecting ring, a jetting unit, and the reversing valve; The pressure inlet of the reversing valve is connected to the high-temperature gas supply system via a pressure inlet pipe, and the high-temperature gas supply system is connected to the gas collecting ring via a composite pipeline; the medium-temperature gas inlet of the reversing valve is connected to the medium-temperature gas supply system, and the medium-temperature gas outlet of the reversing valve is connected to the gas collecting ring via a pipeline; the gas collecting ring is provided with a plurality of jetting units along its circumferential direction for injecting high-temperature gas from the high-temperature gas supply system or medium-temperature gas from the medium-temperature gas supply system.

6. The high-temperature and high-pressure gas reversing valve according to claim 5, characterized in that, The working condition of the medium-temperature gas supply system is: the piston end pressure F1 of the piston component is less than the sealing end pressure F2; Where F1 is the spring force of the compression spring, and F2 is the pressure exerted by the medium-temperature gas supply system on the sealed end of the piston component; or, F1 is the sum of the spring force of the compression spring and the pressure exerted by the internal pressure of the high-temperature gas supply system on the piston end of the piston component, and F2 is the sum of the pressure exerted by the medium-temperature gas supply system on the sealed end of the piston component and the pressure exerted by the inflation chamber pressure of the ignition cartridge on the sealed end of the piston component.

7. The high-temperature and high-pressure gas reversing valve according to claim 5 or 6, characterized in that, The working condition of the high-temperature gas supply system is that the piston end pressure F1 of the piston component is greater than the sealing end pressure F2. Where F1 is the sum of the spring force of the compression spring and the pressure exerted on the piston end of the piston component by the internal pressure of the high-temperature gas supply system cavity, and F2 is the pressure exerted on the sealing end of the piston component by the pressure of the medium-temperature gas supply system cavity; or, F1 is the sum of the spring force of the compression spring and the pressure exerted on the piston end of the piston component by the internal pressure of the high-temperature gas supply system cavity, and F2 is 0.

8. The gas supply system according to claim 5, characterized in that, The jet unit includes a high-temperature thruster and a high-temperature nozzle. One end of the high-temperature thruster is connected to the gas collecting ring through a pipe, and the other end is connected to the high-temperature nozzle. The high-temperature or medium-temperature gas entering the gas collecting ring passes through the high-temperature thruster and is ejected from the high-temperature nozzle to generate thrust.

9. The gas supply system according to claim 5, characterized in that, The reversing valve, medium-temperature gas supply system, high-temperature gas supply system, gas collecting ring, and high-temperature thruster are all fixed to the bottom cover plate with corresponding fasteners.

10. A gas supply method for a gas supply system, employing the gas supply system according to any one of claims 5-9, characterized in that, The total working time is set to T3s, and the high-temperature gas supply is set at the beginning, middle, or end of the time period; the initial position of the piston component is that it is in a state of blocking the passage between the medium-temperature gas inlet and the medium-temperature gas outlet under the action of the spring. When the high-temperature gas supply is scheduled for the middle time period, the gas supply method is as follows: 1) During the time period from 0s to T1s: gas is supplied by the medium-temperature gas supply system. When the medium-temperature gas supply system is ignited, it generates medium-temperature high-pressure gas. When the high-temperature gas supply system is not working, the piston end pressure F1 of the piston component is less than the sealing end pressure F2. The piston component moves towards the pressure inlet until it contacts the limit ring. At this time, the medium-temperature gas supply system is connected to the gas collecting ring, and the gas is supplied by the medium-temperature gas supply system. 2) During the T1s~T2s time period: gas is supplied by the high-temperature gas supply system. At time T1s, the high-temperature gas supply system ignites and generates high-temperature and high-pressure gas. The piston end pressure F1 of the piston component is greater than the sealing end pressure F2. The piston component moves away from the pressure inlet until it blocks the passage between the medium-temperature gas inlet and the medium-temperature gas outlet. The high-temperature gas supply system is connected to the gas collecting ring and is supplied with gas by the high-temperature gas supply system. 3) During the time period T2s~T3s, gas is supplied by the medium-temperature gas supply system; At time T2s, the ignition box generates high-pressure gas. The piston end pressure F1 is less than the sealing end pressure F2. The piston moves towards the pressure inlet until it contacts the limiting ring. At this time, the medium-temperature gas supply system is connected to the gas collecting ring, and the medium-temperature gas supply system supplies gas. When the high-temperature gas supply is set during the initial time period, the gas supply method is as follows: 1) 0s~T1 ＇ s time period: Gas is supplied by the high-temperature gas supply system; When the high-temperature gas supply system is ignited, it generates high-temperature and high-pressure gas. When the medium-temperature gas supply system is not working, the piston end pressure F1 of the piston component is greater than the sealing end pressure F2. The piston component is always in a state of blocking the passage between the medium-temperature gas inlet and the medium-temperature gas outlet. At this time, the high-temperature gas supply system is connected to the gas collecting ring and the high-temperature gas supply system is working to supply gas. 2) T1 ＇ During the time period from s to T3s, gas is supplied by the medium-temperature gas supply system. T1 ＇ At time s, the high-temperature gas supply system finishes working, the ignition box generates high-pressure gas, the piston end pressure F1 of the piston component is less than the sealing end pressure F2, the piston component moves towards the pressure inlet to contact the limit ring, at this time the medium-temperature gas supply system is connected to the gas collecting ring, and gas is supplied by the medium-temperature gas supply system. When the high-temperature gas supply is scheduled for the end of the time period, the gas supply method is as follows: 1) 0s~T2 ＇ s time period: Gas is supplied by the medium-temperature gas supply system; When the medium-temperature gas supply system is ignited, it generates medium-temperature high-pressure gas. When the high-temperature gas supply system is not working, the piston end pressure F1 of the piston component is less than the sealing end pressure F2. The piston component moves towards the pressure inlet until it contacts the limit ring. At this time, the medium-temperature gas supply system is connected to the gas collecting ring, and the gas is supplied by the medium-temperature gas supply system. 2) T2 ＇ During the time period from s to T3s, gas is supplied by the high-temperature gas supply system. T2 ＇ At time s, the high-temperature gas supply system ignites and generates high-temperature and high-pressure gas. The piston end pressure F1 of the piston component is greater than the sealing end pressure F2. The piston component moves away from the pressure inlet until it blocks the passage between the medium-temperature gas inlet and the medium-temperature gas outlet. At this time, the high-temperature gas supply system is connected to the gas collecting ring and the high-temperature gas supply system works to supply gas.

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