High-temperature and high-pressure fuel gas reversing valve and fuel gas supply system and method

Abstract

The invention discloses a high-temperature and high-pressure fuel gas reversing valve, which belongs to the technical field of energy power and comprises a shell component, a piston component and an ignition powder box. One end of the shell part is provided with a pressure guiding opening used for being connected with a high-temperature gas supply system, the other end of the shell part is provided with a medium-temperature gas inlet and a medium-temperature gas outlet, the medium-temperature gas inlet is used for being connected with a medium-temperature gas supply system, and an annular baffle is arranged in the middle of the shell part; the piston part penetrates through the annular baffle and is arranged in the shell part in the axial direction, and the two ends of the piston part are the sealing end and the piston end respectively. The ignition powder box is arranged on the side edge of the shell part, an inflation cavity is formed between the piston end and the annular baffle, and the inflation cavity is communicated with an air outlet of the ignition powder box. The invention further discloses a fuel gas supply system and method adopting the reversing valve. On the premise that an external air pressure control loop is not introduced, time-sharing and sequence-sharing independent work of the medium-temperature fuel gas supply system and the high-temperature fuel gas supply system can be achieved.

Description

Technical Field

[0001] The present invention belongs to the field of energy and power technology, and in particular relates to a high-temperature and high-pressure fuel gas reversing valve, a fuel gas supply system and a method. Background Art

[0002] In the field of engine thrust vector control and terminal attitude control, in order to meet the complex requirements of the aircraft system's attitude control functions, long action time span, complex control force output mode, no obvious regularity in action time, and high total impulse energy requirements, it is preferred to use a hybrid power medium of the medium-temperature gas supply system and the high-temperature gas supply system as the power medium of the actuator. When the work load demand is large, power is provided by the high-temperature gas supply system, and when the work load demand is small, power is provided by the medium-temperature gas supply system. The two power medium systems work independently in time and sequence and cannot affect each other during the working process.

[0003] Therefore, designing a high-temperature and high-pressure gas reversing valve that can meet the requirements that the two power medium systems work independently in time and sequence and cannot affect each other during the working process is an urgent problem to be solved by technical personnel in this field.

[0004] There are many types of reversing valves with different structures and control methods. The traditional pneumatic control reversing valve relies on an external pneumatic signal to switch the main valve and control the circuit to switch or open and close. There are the following problems when using it: (1) Unable to work for a long time under high temperature and high pressure conditions, such as working temperature 1100°C, working pressure 5MPa, and working time 100s; (2) It cannot meet the requirements of controllable and independent output of medium and high temperature gas for a long time (e.g. 15 minutes); (3) An external air pressure control circuit is required, which has a relatively complex structure, large size, high cost and low reliability. Summary of the invention

[0005] In response to one or more of the above defects or improvement needs in the prior art, the present invention provides a high-temperature and high-pressure gas reversing valve, a gas supply system and a method, which can realize independent time-sharing and sequence-based operation of a medium-temperature gas supply system and a high-temperature gas supply system without introducing an external gas pressure control circuit.

[0006] To achieve the above-mentioned object, 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; The shell component is provided with a pressure inlet at one end for connecting to a high-temperature gas supply system, and a medium-temperature gas inlet and a medium-temperature gas outlet at the other end, wherein the medium-temperature gas inlet is used to connect to the medium-temperature gas supply system, and an annular baffle is provided in the middle of the shell component; The piston component passes through the annular baffle and is axially arranged in the shell component. The two ends of the piston component are respectively a sealing end and a piston end. 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 close to the pressure inlet. A spring is provided between the piston end and the end of the shell component where the pressure inlet is provided, and a limiting ring is provided inside the spring. The ignition cartridge is arranged on the side of the shell component, and an air-filled cavity is formed between the piston end and the annular baffle, and the air-filled cavity is communicated with the air outlet of the ignition cartridge.

[0007] As a further improvement of the present invention, the housing component comprises a first housing, a second housing and a third housing which are sequentially threadedly connected along the axial direction; The piston component comprises a piston rod and a sealing member. The sealing member is arranged at one end of the piston rod close to the third housing, and a plurality of sealing grooves are arranged on the contact surface between the third housing and the sealing member.

[0008] As a further improvement of the present invention, the pressure-bearing area of ​​the piston end of the piston component is larger than the pressure-bearing area of ​​the sealing end.

[0009] As a further improvement of the present invention, the ignition powder box includes a powder box body, an aluminum foil, an ignition powder sheet and an electric detonator; the ignition powder sheet is arranged in the powder box body, the aluminum foil sheet is arranged on a side of the ignition powder sheet close to the shell component, and the electric detonator is arranged on a side of the ignition powder sheet away from the shell component.

[0010] According to a second aspect of the present invention, there is provided a gas supply system, which adopts the high-temperature and high-pressure gas reversing valve, and comprises a high-temperature gas supply system and a medium-temperature gas supply system, a gas collecting ring, an injection unit and the reversing valve; The pressure inlet of the reversing valve is connected to the high-temperature gas supply system through a pressure inlet pipe, and the high-temperature gas supply system is connected to the gas collecting ring through 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 through a pipeline; a plurality of injection units are arranged in an annular direction on the gas collecting ring, which are used to inject the high-temperature gas introduced from the high-temperature gas supply system or the medium-temperature gas introduced from the medium-temperature gas supply system.

[0011] As a further improvement of the present invention, the working gas supply 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; Wherein, F1 is the compression spring force, and F2 is the pressure exerted on the sealing end of the piston component by the medium-temperature gas supply system pressure; or, F1 is the sum of the pressure exerted on the piston end by the compression spring force and the pressure in the cavity of the high-temperature gas supply system, and F2 is the sum of the pressure exerted on the sealing end of the piston component by the medium-temperature gas supply system pressure and the pressure exerted on the sealing end of the piston component by the inflation cavity pressure of the ignition cartridge.

[0012] As a further improvement of the present invention, the working gas supply 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; Wherein, F1 is the sum of the pressure on the piston end of the piston component caused by the elastic force of the compression spring and the internal pressure of the high-temperature gas supply system cavity, and F2 is the pressure on the sealing end of the piston component caused by the pressure of the medium-temperature gas supply system; or, F1 is the sum of the pressure on the piston end of the piston component caused by the elastic force of the compression spring and the internal pressure of the high-temperature gas supply system cavity, and F2 is 0.

[0013] 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 pipeline, and the other end is connected to the high-temperature nozzle. The high-temperature combustion gas or medium-temperature combustion gas entering the gas collecting ring passes through the high-temperature thruster and is ejected from the high-temperature nozzle to generate thrust.

[0014] 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.

[0015] According to a third aspect of the present invention, a gas supply method of a gas supply system is provided, wherein the gas supply system is used, the total working time is set to T3s, and the high-temperature gas supply is set in the initial time period, the middle time period or the final time period; the initial position of the piston component is in a state where the passage between the medium-temperature gas inlet and the medium-temperature gas outlet is blocked under the action of the spring; When the high-temperature gas supply is set in the middle time period, the gas supply method is: 1) 0s~T1s time period: gas is supplied by the medium-temperature gas supply system; The medium-temperature gas supply system ignites to produce medium-temperature high-pressure gas, the high-temperature gas supply system does not work, the piston component piston end pressure F1 is less than the sealing end pressure F2, the piston component moves toward 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 medium-temperature gas supply system is working to supply gas; 2) T1s~T2s period: gas is supplied by the high-temperature gas supply system; At T1s, the high-temperature gas supply system ignites to produce 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 the passage between the medium-temperature gas inlet and the medium-temperature gas outlet is blocked. 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 period T2s~T3s, the medium-temperature gas supply system is used to supply gas; At T2s, the ignition cartridge 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 toward 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 medium-temperature gas supply system works to supply gas. When the high-temperature gas supply is set in the initial time period, the gas supply method is: 1) 0s~T1 ＇ s time period: gas is supplied by the high-temperature gas supply system; The high-temperature gas supply system is ignited to generate high-temperature and high-pressure gas, 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, and the piston component is always in a state of blocking the channel 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 ＇ s~T3s time period: gas is supplied by the medium-temperature gas supply system; T1 ＇ At time s, the high-temperature gas supply system stops working, the ignition cartridge 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 toward the pressure inlet until it contacts the limit ring, and the medium-temperature gas supply system is connected to the gas collecting ring, and the medium-temperature gas supply system is working to supply gas; When the high-temperature gas supply is set at the end of the time period, the gas supply method is: 1) 0s~T2 ＇ s time period: gas is supplied by the medium-temperature gas supply system; The medium-temperature gas supply system ignites to produce medium-temperature high-pressure gas, the high-temperature gas supply system does not work, the piston component piston end pressure F1 is less than the sealing end pressure F2, the piston component moves toward 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 medium-temperature gas supply system is working to supply gas; 2) T2 ＇ s~T3s time period: gas is supplied by the high-temperature gas supply system; T2 ＇At time s, the high-temperature gas supply system ignites to produce high-temperature and high-pressure gas. The pressure F1 at the piston end of the piston component is greater than the pressure F2 at the sealing end. The piston component moves away from the pressure inlet until the channel between the medium-temperature gas inlet and the medium-temperature gas outlet is blocked. At this time, the high-temperature gas supply system is connected to the gas collecting ring, and the high-temperature gas supply system is used to supply gas.

[0016] In general, the above technical solution conceived by the present invention has the following beneficial effects compared with the prior art: (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 in a time-sharing and sequenced manner without introducing an external gas pressure control circuit, and does not affect each other during the operation. It can reliably switch directions under long-term high-temperature and high-pressure working conditions, solving the difficulty of complex gas supply requirements of the system, and has the characteristics of simple structure, fast response speed, high integration, and flexible expansion and application.

[0017] (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 and high-pressure gas, which flows through the reversing valve and is guided by the gas collecting ring into the high-temperature thruster and the high-temperature nozzle, and then outputs the gas to generate thrust; the high-temperature gas supply system generates high-temperature and high-pressure gas, which closes the reversing valve and is guided by the gas collecting ring into the high-temperature thruster and the high-temperature nozzle, and then outputs the 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, thereby greatly reducing the system cost; the other two sets of gas supply systems can share components such as gas collecting rings, high-temperature thrusters and high-temperature nozzles, with high integration and significant lightweight effects.

[0018] (3) The gas supply method of the present invention has two sets of gas supply systems that can output gas and generate thrust in a time-sharing, orderly and controllable manner. Through parameter matching, it can be applied to gas reversing conditions with a variety of working times, working temperatures and working pressures, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a gas supply system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a high-temperature and high-pressure gas reversing valve according to an embodiment of the present invention; Figure 3 It is a gas supply schematic diagram of a medium-temperature gas supply system of a high-temperature and high-pressure gas reversing valve according to an embodiment of the present invention.

[0020] In all the drawings, the same reference numerals represent the same technical features, specifically: 1. reversing valve; 2. bottom cover plate; 3. high-temperature gas supply system; 4. pressure lead pipe; 5. composite pipeline; 6. gas collecting ring; 7. high-temperature thruster; 8. high-temperature nozzle; 9. fasteners; 11. first housing; 12. second housing; 13. third housing; 14. piston rod; 15. sealing element; 16. spring; 17. first sealing ring; 18. ignition cartridge; 19. sealing groove; 181. Medicine box body; 182. Aluminum foil; 183. Ignition powder tablet; 184. Copper pad; 185. Electric detonator; 186. Second sealing ring. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] As a preferred embodiment of the present invention, Figures 1 to 3 As shown, the gas supply system of the embodiment of the present invention comprises a reversing valve 1, a high-temperature gas supply system 3, a medium-temperature gas supply system, a gas collecting ring 6 and an injection unit. The reversing valve 1 is provided with a pressure inlet at one end and a medium-temperature gas inlet and a medium-temperature gas outlet at the other end, wherein the pressure inlet is connected to the high-temperature gas supply system 3 through a pressure inlet pipe 4, and the high-temperature gas supply system 3 is connected to the gas collecting ring 6 through 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 through a pipeline, so that the high-temperature gas supply system and the medium-temperature gas supply system are physically isolated; a plurality of injection units are provided along the annular direction of the gas collecting ring 6, and each injection unit opens outward, and is used to inject the high-temperature gas introduced from the high-temperature gas supply system 3 or the medium-temperature gas introduced from the medium-temperature gas supply system.

[0027] Preferably, the high-temperature gas supply system 3 is connected via a one-way valve and a composite pipeline 5, which can prevent the medium-temperature gas from entering the high-temperature gas supply system 3 before the high-temperature gas supply system 3 is operated and during the operation of the medium-temperature gas system.

[0028] 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 pipeline, and the other end is connected to the high-temperature nozzle 8, and the high-temperature nozzle 8 opens outward; the high-temperature combustion gas or medium-temperature combustion 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.

[0029] 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 .

[0030] Preferably, the composite pipeline 5 includes a metal pipeline shell, the inner wall of which is provided with a heat insulating layer. Since high-temperature gas flows in the composite pipeline, the provision of the heat insulating layer can mitigate the effect of high temperature on the metal shell of the composite pipeline.

[0031] Preferably, the gas collecting ring 6 is formed by 3D printing of high-temperature alloy.

[0032] like Figure 2 As shown, the reversing valve 1 of the embodiment of the present invention comprises a shell component, a piston component and an ignition cartridge. The shell component has a pressure inlet at one end and a medium-temperature gas inlet and a medium-temperature gas outlet at the other end. An annular baffle is provided in the middle of the shell component; the piston component passes through the annular baffle and is axially arranged in the shell component. The two ends of the piston component are respectively a sealing end and a piston end. The sealing end is located on the side of the annular baffle away from the pressure inlet, which is used to seal or communicate between the medium-temperature gas inlet and the medium-temperature gas outlet; the piston end is located on the side of the annular baffle close to the pressure inlet. Further, a spring 16 is provided between the piston end and one end of the shell component where the pressure inlet is provided, and a limiting ring is provided inside the spring 16. The limiting ring can play a radial limiting role on the spring 16 on the one hand, and play an axial limiting role when the piston component moves toward the pressure inlet on the other hand. Further, an ignition cartridge 18 is provided on the side of the shell component, and an inflatable cavity is formed between the piston end of the piston component and the annular baffle, and the inflatable cavity is communicated with the gas outlet of the ignition cartridge 18.

[0033] Preferably, the housing component includes a first housing 11, a second housing 12 and a third housing 13 connected in sequence 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, and the operating temperature is not less than 300°C.

[0034] 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.

[0035] In more detail, one end of the first shell 11 is connected to the outside of the second shell 12, and the other end is a pressure inlet; one end of the third shell 13 is connected to the outside of the second shell 12, and the other end has a medium-temperature gas inlet and a medium-temperature gas outlet. The piston component includes a piston rod 14 and a seal 15. The seal 15 is arranged at one end of the piston rod 14 close to the third shell 13, and a plurality of sealing grooves 19, such as annular triangular grooves, are arranged on the contact surface between the third shell and the seal 15, so that the seal 15 and the shell component form a multi-pass seal, and the seal is more reliable; the material of the seal 15 is preferably 9621D or 824 flexible ablation-resistant material. An annular baffle is arranged in the middle of the second shell 12, and the inflatable cavity formed by the piston rod 14 and the annular baffle is connected to the outlet of the ignition cartridge 18 arranged on the side of the second shell 12.

[0036] In the preferred embodiment, refer again to Figure 2 The ignition cartridge includes a cartridge body 181, an aluminum foil sheet 182, an ignition tablet 183, and an electric detonator 185. The ignition tablet 183 is arranged in the cartridge body 181, the aluminum foil sheet 182 is arranged on the side of the ignition tablet 183 close to the shell component, and the electric detonator 185 is arranged on the side of the ignition tablet 183 away from the shell component. The electric detonator 185 and the cartridge body 181 are sealed by a copper gasket 184, and the cartridge body 181 and the shell component are sealed by a second sealing ring 186 (such as an O-ring). More preferably, the second sealing ring 186 is made of fluorosilicone rubber, and the operating temperature is 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.

[0037] The present invention also provides a gas supply method based on the above-mentioned gas supply system, setting the total working time to T3s. According to the actual situation, the high-temperature gas supply can be set in the initial time period, the middle time period or the final time period. In this embodiment, the medium-temperature gas supply system can generate medium-temperature and high-pressure gas of 300°C and P1=7MPa, and the gas supply time is not less than 15min; the high-temperature gas supply system can generate high-temperature and high-pressure gas of 1100°C and P2=5MPa, and the gas supply time is not less than 100s.

[0038] It should be noted that when not in operation, the spring is always in a compressed state to limit the displacement of the piston component, which is beneficial to ensure stability during transportation. Therefore, when the high-temperature gas supply is set in the initial time period, the middle time period or the final time period, under the action of the spring force, the initial position of the piston component is Figure 2 As shown, the initial position of the piston component 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.

[0039] When the high-temperature gas supply is set in the middle time period, the gas supply method is: 1) 0s~T1s time period: gas is supplied by the medium-temperature gas supply system; At 0s, the medium-temperature gas supply system starts to ignite and produce medium-temperature high-pressure gas. The medium-temperature gas inlet pressure of 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 inlet 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 elastic force of the compression spring, and F2 is the pressure of the medium-temperature gas supply system pressure acting on the lower end of the piston component). The piston component moves toward the pressure inlet to the limit position (contacting the limit ring). The structural diagram after moving to the position is as shown in the figure. Figure 3 As shown, at this time, the medium-temperature gas supply system is connected to the gas collecting ring 6, and 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 the gas is output to generate thrust; 2) T1s~T2s period: gas is supplied by the high-temperature gas supply system; At T1s, the high-temperature gas supply system 3 ignites to produce high-temperature and high-pressure gas. The pressure at the pressure inlet of the reversing valve 1 is the internal pressure of the cavity 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 elastic force of the compression spring and the internal pressure of the cavity of the high-temperature gas supply system acting on the upper end of the piston component, and F2 is the pressure of the medium-temperature gas supply system acting on the lower end of the piston component). The piston component moves downward until the piston component blocks the channel between the medium-temperature gas inlet and the medium-temperature gas outlet. The structural diagram after movement into place is as shown in FIG. Figure 2 As shown, at this time, the piston component isolates the medium-temperature gas supply system from the high-temperature gas supply system 3, and 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 the gas is output to generate thrust; 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.

[0040] 3) During the period T2s~T3s, the medium-temperature gas supply system is used to supply gas; At T2s, the high-temperature gas supply system stops working, and the electric detonator 185 in the ignition cartridge 18 ignites the ignition tablet 183 to generate high-pressure gas. The pressure of the gas-filled cavity connected to the ignition cartridge 18 is P3 (10MPa), the pressure of the pressure inlet of the reversing valve 1 and the pressure on the upper end of the piston component are P2 (5MPa), and the pressure on the lower end of the piston component is P1 (7MPa). The pressure F1 on the upper end of the piston component is less than the pressure F2 on the lower end (F1 is the sum of the pressure on the upper end of the piston component caused by the elastic force of the compression spring and the internal pressure of the high-temperature gas supply system cavity, and F2 is the sum of the pressure on the lower end of the piston component caused by the pressure of the medium-temperature gas supply system and the pressure on the lower end of the piston component caused by the gas-filled cavity pressure of the ignition cartridge). Under the action of the pressure difference, the piston component moves to the pressure inlet to the limit position (contacting the limit ring). The structure after moving to the position is shown in the figure below. Figure 3 As shown, at this time, the medium-temperature gas supply system is connected to the gas collecting ring 6, and the medium-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 the gas is output to generate thrust.

[0041] After the high-temperature gas supply system finishes working at time T2s, without setting the ignition cartridge 18, each high-temperature thruster 7 is closed and does not work, the pressure in the entire chamber is the medium-temperature gas supply system pressure P1, and the piston component moves downward under the action of the pressure difference (the pressures at the upper and lower ends of the piston are the same, but the pressure-bearing area at the upper end of the piston is larger than the pressure-bearing area at the lower end of the piston, so the pressure at the upper end of the piston is larger than the pressure at the lower end of the piston), and after the high-temperature thruster 7 starts exhausting, the pressure of the gas collecting ring 6 and the pressure inlet port decreases, and the piston component moves upward under the action of the pressure difference, which causes the piston component to reciprocate upward and downward, and there are problems such as untimely gas replenishment affecting the output of the high-temperature thruster 7. The embodiment of the present invention can ensure the pressure of the piston component moving toward the pressure inlet port by setting the ignition cartridge 18, thereby ensuring the output of the medium-temperature gas, and will not affect the output of the high-temperature thruster.

[0042] When the high-temperature gas supply is set in the initial time period, the gas supply method is: 1) 0s~T1 ＇ s time period: gas is supplied by the high-temperature gas supply system; At 0s, the high-temperature gas supply system starts to ignite and produce high-temperature and high-pressure gas. The medium-temperature gas supply system is not working. The pressure at the pressure inlet is the internal pressure of the high-temperature gas supply system cavity. The pressure F1 on the upper end of the piston component is greater than the pressure F2 on the lower end (F1 is the sum of the elastic force of the compression spring and the internal pressure of the high-temperature gas supply system cavity acting on the upper end of the piston component, and F2 is 0). The piston component is always in Figure 2 In the state shown, the piston component isolates the medium-temperature gas supply system from the high-temperature gas supply system 3, and 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 the gas is output to generate thrust; 2) T1 ＇ s~T3s time period: gas is supplied by the medium-temperature gas supply system; T1 ＇ At time s, the high-temperature gas supply system ends its operation, and the electric detonator 185 in the ignition cartridge 18 ignites the ignition tablet 183 to generate high-pressure gas; the reversing valve inlet pressure and the piston component lower end pressure are the medium-temperature gas supply system pressure P1, the reversing valve pressure inlet pressure and the piston component upper end pressure are P2, and the inflation chamber pressure connected to the ignition cartridge 18 is P3; the piston component upper end pressure F1 is less than the lower end pressure F2 (F1 is the sum of the compression spring force and the high-temperature gas supply system cavity internal pressure acting on the piston component upper end pressure, F2 is the sum of the medium-temperature gas supply system pressure acting on the piston component lower end pressure and the ignition cartridge inflation chamber pressure acting on the piston component lower end pressure), the piston component moves upward under the pressure difference until it contacts the limit ring, and the structural diagram after movement into place is as shown in the figure. Figure 3 As shown, at this time, the medium-temperature gas supply system is connected to the gas collecting ring 6, and the medium-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 the gas is output to generate thrust.

[0043] When the high-temperature gas supply is set at the end of the time period, the gas supply method is: 1) 0s~T2 ＇ s period: gas is supplied by the medium-temperature gas supply system; At 0s, the medium-temperature gas supply system starts to ignite and produce medium-temperature high-pressure gas. The high-temperature gas supply system is not working. The inlet pressure of the reversing valve is the medium-temperature gas supply system pressure P1, the pressure of the reversing valve pressure inlet is P2, and the pressure F1 on the upper end of the piston component is less than the pressure F2 on the lower end (F1 is the elastic force of the compression spring, and F2 is the pressure of the medium-temperature gas supply system acting on the lower end of the piston component). The piston component moves upward to the limit position (contacting the limit ring). The structural diagram after movement is as follows Figure 3 As shown, at this time, the medium-temperature gas supply system is connected to the gas collecting ring 6, and 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 the gas is output to generate thrust; 2) T2 ＇ s~T3s time period: gas is supplied by the high-temperature gas supply system; T2 ＇At time s, the high-temperature gas supply system ignites to produce high-temperature and high-pressure gas. The pressure at the pressure inlet is 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 pressure of the compression spring force and the internal pressure of the high-temperature gas supply system cavity acting on the upper end of the piston component, and F2 is the pressure of the medium-temperature gas supply system pressure acting on the lower end of the piston component). The piston component moves downward until the piston component blocks the medium-temperature gas inlet and the medium-temperature gas outlet. The structural diagram after movement into place is as shown in Figure 2 As shown, at this time, the piston component isolates the medium-temperature gas supply system from the high-temperature gas supply system, and 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 the gas is output to generate thrust.

[0044] It is understandable that the present invention does not specifically limit the elastic force of the spring, the piston end of the piston component and the pressure-bearing area of ​​the sealing ring, and 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 gas-filled cavity connected to the ignition cartridge are not limited to the values ​​in the above-mentioned specific embodiments, as long as the piston end pressure F1 of the piston component is less than the sealing end pressure F2 (the working gas supply condition of the medium-temperature gas supply system), or the piston end pressure F1 of the piston component is greater than the sealing end pressure F2 (the working gas supply condition of the high-temperature gas supply system). In addition, the high-temperature gas supply system and the medium-temperature gas supply system can adopt the existing technology, and their specific gas temperature and supply time can be adjusted according to actual needs. Therefore, the present invention can be applied to gas reversing conditions with various working times, working temperatures, and working pressures through parameter matching.

[0045] It will be easily understood by those skilled in the art that the above description is only 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 in the protection scope of the present invention.

Claims

1. A high-temperature and high-pressure gas reversing valve, characterized in that: It includes a shell component, a piston component and an ignition cartridge; The shell component is provided with a pressure inlet at one end for connecting to a high-temperature gas supply system, and a medium-temperature gas inlet and a medium-temperature gas outlet at the other end, wherein the medium-temperature gas inlet is used to connect to the medium-temperature gas supply system, and an annular baffle is provided in the middle of the shell component; The piston component passes through the annular baffle and is axially arranged in the shell component. The two ends of the piston component are respectively a sealing end and a piston end. 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 close to the pressure inlet. A spring is provided between the piston end and the end of the shell component where the pressure inlet is provided, and a limiting ring is provided inside the spring. The ignition cartridge is arranged on the side of the shell component, and an air-filled cavity is formed between the piston end and the annular baffle, and the air-filled cavity is communicated with 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 comprises a first housing, a second housing and a third housing which are sequentially threadedly connected along the axial direction; The piston component comprises a piston rod and a sealing member. The sealing member is arranged at one end of the piston rod close to the third housing, and a plurality of sealing grooves are arranged on the contact surface between the third housing and the sealing member.

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

4. The high-temperature and high-pressure gas reversing valve according to any one of claims 1 to 3, characterized in that: The ignition powder box comprises a box body, an aluminum foil, an ignition powder and an electric detonator; the ignition powder is arranged in the box body, the aluminum foil is arranged on a side of the ignition powder close to the shell component, and the electric detonator is arranged on a side of the ignition powder away from the shell component.

5. A gas supply system, using the high-temperature and high-pressure gas reversing valve according to any one of claims 1 to 4, characterized in that: It includes a high-temperature gas supply system and a medium-temperature gas supply system, a gas collecting ring, an injection unit and the reversing valve; The pressure inlet of the reversing valve is connected to the high-temperature gas supply system through a pressure inlet pipe, and the high-temperature gas supply system is connected to the gas collecting ring through 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 through a pipeline; a plurality of injection units are arranged in an annular direction on the gas collecting ring, which are used to inject the high-temperature gas introduced from the high-temperature gas supply system or the medium-temperature gas introduced 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 gas supply 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; Wherein, F1 is the compression spring force, and F2 is the pressure exerted on the sealing end of the piston component by the medium-temperature gas supply system pressure; or, F1 is the sum of the pressure exerted on the piston end by the compression spring force and the pressure in the cavity of the high-temperature gas supply system, and F2 is the sum of the pressure exerted on the sealing end of the piston component by the medium-temperature gas supply system pressure and the pressure exerted on the sealing end of the piston component by the inflation cavity pressure of the ignition cartridge.

7. The high-temperature and high-pressure gas reversing valve according to claim 5 or 6, characterized in that: The working gas supply 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; Wherein, F1 is the sum of the pressure on the piston end of the piston component caused by the elastic force of the compression spring and the internal pressure of the high-temperature gas supply system cavity, and F2 is the pressure on the sealing end of the piston component caused by the pressure of the medium-temperature gas supply system; or, F1 is the sum of the pressure on the piston end of the piston component caused by the elastic force of the compression spring and 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 pipeline, and the other end is connected to the high-temperature nozzle. The high-temperature combustion gas or medium-temperature combustion 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, the medium-temperature fuel gas supply system, the high-temperature fuel gas supply system, the gas collecting ring and the high-temperature thruster are all fixed to the bottom cover plate by corresponding fasteners.

10. A gas supply method of a gas supply system, using the gas supply system according to any one of claims 5 to 9, characterized in that: The total working time is set to T3s, and the high-temperature gas supply is set in the initial time period, the middle time period or the final time period; the initial position of the piston component 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 set in the middle time period, the gas supply method is: 1) 0s~T1s time period: gas is supplied by the medium-temperature gas supply system; The medium-temperature gas supply system ignites to produce medium-temperature high-pressure gas, the high-temperature gas supply system does not work, the piston component piston end pressure F1 is less than the sealing end pressure F2, the piston component moves toward 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 medium-temperature gas supply system is working to supply gas; 2) T1s~T2s period: gas is supplied by the high-temperature gas supply system; At T1s, the high-temperature gas supply system ignites to produce 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 the passage between the medium-temperature gas inlet and the medium-temperature gas outlet is blocked. 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 period T2s~T3s, the medium-temperature gas supply system is used to supply gas; At T2s, the ignition cartridge 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 toward 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 medium-temperature gas supply system works to supply gas. When the high-temperature gas supply is set in the initial time period, the gas supply method is: 1) 0s~T1 ＇ s time period: gas is supplied by the high-temperature gas supply system; The high-temperature gas supply system is ignited to generate high-temperature and high-pressure gas, 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, and the piston component is always in a state of blocking the channel 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 ＇ s~T3s time period: gas is supplied by the medium-temperature gas supply system; T1 ＇ At time s, the high-temperature gas supply system stops working, the ignition cartridge 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 toward the pressure inlet until it contacts the limit ring, and the medium-temperature gas supply system is connected to the gas collecting ring, and the medium-temperature gas supply system is working to supply gas; When the high-temperature gas supply is set at the end of the time period, the gas supply method is: 1) 0s~T2 ＇ s time period: gas is supplied by the medium-temperature gas supply system; The medium-temperature gas supply system ignites to produce medium-temperature high-pressure gas, the high-temperature gas supply system does not work, the piston component piston end pressure F1 is less than the sealing end pressure F2, the piston component moves toward 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 medium-temperature gas supply system is working to supply gas; 2) T2 ＇ s~T3s time period: gas is supplied by the high-temperature gas supply system; T2 ＇ At time s, the high-temperature gas supply system ignites to produce high-temperature and high-pressure gas. The pressure F1 at the piston end of the piston component is greater than the pressure F2 at the sealing end. The piston component moves away from the pressure inlet until the channel between the medium-temperature gas inlet and the medium-temperature gas outlet is blocked. At this time, the high-temperature gas supply system is connected to the gas collecting ring, and the high-temperature gas supply system is used to supply gas.

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