A space on-orbit gas-liquid filling valve

Abstract

A space on-orbit gas-liquid filling valve relates to the field of on-orbit propellant filling, including an active end and a passive end. The active / passive end includes an active / passive valve body, an active / passive joint connected to one end of the active / passive valve body, a floating body A / B and a spring A / B located in the main / passive valve body, and an active / passive push rod. Under the action of the spring force, a seal is formed between the floating body A / B and the main / passive joint; the active / passive push rod is used to push the floating body A / B to move and release the seal between the floating body A / B and the main / passive joint. The active joint is used for the passive joint to be inserted, and the O-ring on the inner wall of the active joint realizes the external sealing of the filling channel; as the passive end is plugged into the active end, the active / passive push rod pushes the floating body A / B, the internal seal is released, and the fluid channel is connected. After the filling is completed, the medium in the valve is emptied. The active / passive end is separated, and under the action of the spring force, the floating body A / B is reset, the internal seal is established, and the fluid channel is disconnected. Highly reliable and leak-free filling of on-orbit fluid is achieved.

Description

Technical Field

[0001] The present application relates to a gas and liquid filling valve for in-orbit filling of satellites, belonging to the technical field of in-orbit filling of satellite propellants. Background Art

[0002] The on-orbit filling valve is an important device for realizing the on-orbit propellant replenishment mission of future high-value satellites at the end of their lifespan, and is also one of the key devices for on-orbit services of manned space engineering. The main function of this device is to realize the connection and disconnection of liquid and gas circuits according to certain requirements, complete the opening and closing of the fluid sealing channel and the sealing maintenance through the cooperation of the active end joint and the end dynamic end interface, realize the transmission of propellant and pressurized gas between spacecraft, and complete the on-orbit propellant replenishment mission for the recipient spacecraft.

[0003] At present, the satellite constellation in orbit includes a large number of high-performance satellites. These satellites need to perform frequent orbital maneuvers when conducting detailed surveys of hot spots. Each orbital maneuver consumes a large amount of propellant, and the consumption of propellant becomes a key factor restricting their functions and orbital life. At the same time, since these satellites are expensive, if they are always used in a single-star one-time launch mode, it will cost a lot of financial resources. In addition, the consumption of gas and liquid in the manned space station itself requires cargo spacecraft to regularly replenish the space station propellant in orbit.

[0004] With the continuous improvement of satellite technology in the future, improving the efficiency of on-orbit resource utilization of spacecraft and reducing the cost of using on-orbit resources of spacecraft will become the key development direction of the future aerospace technology field. On-orbit refueling can effectively extend the on-orbit service life of spacecraft and reduce the on-orbit operation cost of spacecraft. It is an important development direction of my country's aerospace technology field in the future.

[0005] At present, the relevant filling valve structure usually has four to five sealing structures in different positions to complete the sealing of the filling valve. There are many sealing positions, many possible leakage points, and low reliability. Summary of the invention

[0006] The technology of the present invention solves the problem: overcomes the deficiencies of the prior art and provides a space on-orbit gas-liquid filling valve that can achieve high-reliability and leakage-free filling of space on-orbit fluids.

[0007] This application adopts the following technical solutions:

[0008] A space on-rail gas-liquid filling valve comprises an active end connected to a filling container and a passive end connected to a filled container; the active end comprises an active valve body, an active joint connected to one end of the active valve body, a floating body A located in the active valve body, a spring A and an active push rod, under the action of the spring force, a seal is formed between the floating body A and the active joint; the active push rod is used to push the floating body A to move and release the seal between the floating body A and the active joint; the active joint is used for the passive joint to be inserted, and an O-ring is provided on the inner wall of the active joint to realize the external sealing of the filling channel;

[0009] The passive end includes a passive valve body, a passive joint connected to one end of the passive valve body, a floating body B arranged in the passive valve body, a spring B and a passive push rod. Under the action of the spring force, a seal is formed between the floating body B and the passive joint; the passive push rod is used to push the floating body B to move and release the seal between it and the passive joint.

[0010] Through the above technical solution, under the action of spring force, a seal is formed between the floating body A / B and the active / passive joint; the active / passive push rod is used to push the floating body A / B to move and release the seal between the active / passive joint. The active joint is used for the passive joint to be inserted, and the O-ring on the inner wall of the active joint realizes the external seal of the filling channel; as the passive end is plugged into the active end, the active / passive push rod pushes the floating body A / B, the internal seal is released, and the fluid channel is connected. After the filling is completed, the medium in the valve is emptied. The active / passive ends are separated, and under the action of the spring force, the floating body A / B is reset, the internal seal is established, and the fluid channel is disconnected. Highly reliable and leak-free filling of on-orbit fluid is achieved.

[0011] The floating body A comprises a sealing member A, a valve core A, and a fixing member A for fixing the sealing member A in the valve core A. The valve core A slides along the axial direction in the active valve body, the middle section of the cylindrical surface of the valve core A is hollowed out, and the sealing member A is connected to the hollowed out part in the valve core A. The floating body B comprises a sealing member B, a valve core B, and a fixing member B for fixing the sealing member B in the valve core B. The valve core B slides along the axial direction in the passive valve body, the middle section of the cylindrical surface of the valve core B is hollowed out, and the sealing member B is connected to the hollowed out part in the valve core B.

[0012] The fixing member A comprises a spring seat A and a large locking nut A located in the valve core A. The inner wall of the valve core A is provided with a stop surface A for positioning the sealing member A. The spring seat A and the large locking nut A are located in sequence on the side of the sealing member A away from the stop surface A. The large locking nut A is threadedly connected to the valve core A, and the spring seat A (4) and the sealing member A (5) are pressed against the stop surface A of the valve core A (6). The cylindrical surface of the spring seat A (4) is hollowed out.

[0013] The fixing member B comprises a spring seat B and a large locking nut B located in the valve core B. The inner wall of the valve core B is provided with a stop surface B for positioning the sealing member B. The spring seat B and the large locking nut B are located in sequence on a side of the sealing member B away from the stop surface B. The large locking nut B is threadedly connected to the valve core B, pressing the spring seat B (18) and the sealing member B (16) on the stop surface B of the valve core B (17). The cylindrical surface of the spring seat B (18) is hollowed out.

[0014] The middle part of the seal A on the side away from the active joint is convex, and the middle part of the seal A on the side facing the active joint is concave, and the concave part is used to fix and support the active push rod; the middle part of the seal B on the side away from the passive joint is convex, and the middle part of the seal B on the side facing the passive joint is concave, and the concave part is used to fix and support the passive push rod.

[0015] The active joint is provided with a sealing cone A at the end close to the active valve body, and the outer diameter of the sealing cone A gradually increases in the direction away from the sealing member A, and the sealing cone A is inserted in the active valve body; the passive joint is provided with a sealing cone B at the end close to the passive valve body, and the outer diameter of the sealing cone B gradually increases in the direction away from the sealing member B, and the sealing cone B is inserted in the passive valve body.

[0016] The inner wall of the active joint is provided with threads, and the support ring A and the small locking nut A are connected therein through threads and locked with each other;

[0017] The inner wall of the passive joint is provided with threads, and the support ring B and the small locking nut B are connected therein through threads and locked with each other.

[0018] The active ejector rod is a slender rod with an umbrella-shaped disk at the head. The thin shaft at the head of the active ejector rod is inserted into the seal A, the umbrella-shaped disk contacts the end surface of the seal A, and the step shaft at the tail of the active ejector rod is inserted into the support ring A, thereby achieving support and position limiting of the active ejector rod.

[0019] The passive ejector rod is a slender rod with an umbrella-shaped disk at the head. The thin shaft at the head of the passive ejector rod is inserted into the seal B, the umbrella-shaped disk contacts the end surface of the seal B, and the stepped shaft at the tail of the passive ejector rod is inserted into the support ring B (13), thereby achieving support and position limiting of the passive ejector rod.

[0020] In summary, this application at least includes the following beneficial technical effects:

[0021] (1) The present invention has a highly reliable internal and external sealing structure. The active end and the passive end themselves adopt an axial sealing form, which reduces the complexity of the internal sealing structure. The spring preload force provides sufficient sealing pressure ratio. A certain gap is left between the valve core and the joint. After the seal produces an indentation of a certain depth, a limit is formed to prevent the sealing surface from being damaged by overload, thereby ensuring the reliable internal sealing of the filling valve; the external seal between the active and passive valve bodies adopts a double-pass O-ring structure, which can achieve reliable external sealing, reduce external leakage points compared with the existing technology, and improve the reliability of the system external sealing.

[0022] (2) The push rod of the present invention adopts a double-point support structure with a large aspect ratio, which can effectively reduce the friction resistance caused by the unbalanced torque during the movement of the push rod and improve the stability of the push rod movement; the structure of supporting the push rod with an inner concave seal can effectively suppress the generation of excess matter during the movement of the push rod, avoid contamination of the sealing surface, and improve the reliability of the internal seal.

[0023] (3) The present invention has designed a push rod positioning and locking structure in both the active and passive valves, which is composed of a small locking nut, a support ring and an internal thread of a joint. Through the axial positioning of the locking structure, the accurate axial limit of the active and passive push rods is guaranteed, the axial clearance of the push rods is prevented from being too large, and the structural stability of the valve in the free state is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the active end structure of the space on-orbit gas-liquid filling valve in a specific implementation manner of the present invention;

[0025] Figure 2 This is a schematic diagram of the passive end structure of the on-orbit gas-liquid filling valve in space;

[0026] Figure 3 This is a schematic diagram of the butt-joint connection between the active and passive end valve ports before opening and closing;

[0027] Figure 4 This is a schematic diagram of the active and passive valves after docking;

[0028] Figure 5 It is a schematic diagram of the seal A / seal B structure;

[0029] Figure 6 It is a structural diagram of valve core A / valve core B;

[0030] Figure 7 It is a schematic diagram of the structure of spring seat A / spring seat B.

[0031] Explanation of the accompanying drawings: 1. active valve body; 2. spring A; 3. large locking nut A; 4. spring seat A; 5. seal A; 6. valve core A; 7. active joint; 8. support ring A; 9. small locking nut A; 10. active push rod; 11. O-ring; 12. small locking nut B; 13. support ring B; 14. passive push rod; 15. passive joint; 16. seal B; 17. valve core B; 18. spring seat B; 19. large locking nut B; 20. spring B; 21. passive valve body. DETAILED DESCRIPTION

[0032] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0033] An embodiment of the present application discloses a space on-orbit gas-liquid filling valve.

[0034] like Figure 1-3 As shown, a space on-rail gas-liquid filling valve includes an active end connected to a filling container and a passive end connected to a filled container. When the passive end is inserted into the active end, the active end and the passive end are open, and the filling container and the filled container are connected through the active end and the passive end; when the passive end is not inserted into the active end, the active end and the passive end are closed.

[0035] like Figure 1 As shown, the active end specifically includes an active valve body 1, an active joint 7, a spring A2, a spring seat A4, a large locking nut A3, a seal A5, a valve core A6, a support ring A8, a small locking nut A9, an active push rod 10, and an O-ring 11.

[0036] like Figure 2 As shown, the passive end specifically includes a passive valve body 21, a passive joint 15, a spring B20, a spring seat B18, a large locking nut B19, a seal B16, a valve core B17, a small locking nut B12, a passive push rod 14, and a support ring B13.

[0037] like Figure 1 and Figure 3 As shown, the active joint 7 is connected to the end of the active valve body 1, and an integrated design of the joint and the valve seat is adopted;

[0038] The valve core A6 slides in the active valve body 1 along the axial direction of the active valve body 1. The valve core A6 is cylindrical. The inner wall of the valve core A6 is provided with a stop surface A for positioning the seal A5. The seal A5, the spring seat A4, and the large locking nut A3 are sequentially located on the side of the stop surface A in the valve core A6 away from the active joint 7. The large locking nut A3 is threadedly connected to the valve core A6. The large locking nut A3 presses the seal A5 and the spring seat A4 into the valve core A6. The active push rod 10 is connected to the end of the seal A5 facing the active joint 7 and extends out of the active joint 7. The large locking nut A3 is connected to the valve core A6, the spring seat A4, and the seal A5 as a whole to form a floating body A. The floating body A and the active push rod 10 can reciprocate along the axis of the active valve body 1 and the active joint 7.

[0039] The valve core A6 is a cylindrical shape with one end sealed, and the middle section of the cylindrical surface of the valve core A6 is hollow (such as Figure 6 As shown in FIG. 1 , the seal A5 and the spring seat A4 are connected to the hollow part in the valve core A6. The spring seat A4 is a cylinder with a ring connected to one end. The ring at the end of the spring seat A4 abuts against the end face of the seal A5. The cylindrical surface of the valve core A6 and the spring seat A4 is hollow (as shown in FIG. 1 ). Figure 7 As shown), the fluids on both sides of the seal A5 can be connected through the two hollow positions;

[0040] A sealing cone A is provided at the end of the active joint 7 close to the active valve body 1. The outer diameter of the sealing cone A gradually increases in the direction away from the sealing member A5. The sealing cone A is inserted into the active valve body 1. The sealing cone A and the sealing member A5 together form a sealing pair. The sealing force between the sealing cone A and the sealing member A5 is loaded by a spring A2. The spring A2 is installed between the active valve body 1 and the spring seat A4.

[0041] like Figure 2 and Figure 3 As shown, the passive joint 15 is connected to the end of the passive valve body 21, and an integrated design of the joint and the valve seat is adopted;

[0042] The valve core B17 slides along the axial direction in the passive valve body 21. The valve core B17 is cylindrical. The inner wall of the valve core B17 is provided with a limit surface B for positioning the seal B16. The seal B16, the spring seat B18, and the large locking nut B19 are sequentially located on the side of the limit surface B in the valve core B17 away from the passive joint 15. The large locking nut B19 is threadedly connected to the valve core B17. The large locking nut B19 presses the seal B16 and the spring seat B18 into the valve core B17. The passive push rod 14 is connected to the end of the seal B16 facing the passive joint 15 and extends out of the passive joint 15. The seal B16, the spring seat B18, the large locking nut B19, and the valve core B17 are connected as a whole to form a floating body B. The floating body B and the passive push rod 14 can reciprocate along the axis of the passive valve body 21 and the passive joint 15.

[0043] The valve core B17 is a cylindrical shape with one end sealed, and the middle section of the cylindrical surface of the valve core B17 is hollow (such as Figure 6 As shown in FIG. 1 , the seal B16 and the spring seat B18 are connected to the hollow part of the valve core B17. The spring seat B17 is a cylinder with a ring connected to one end. The ring at the end of the spring seat B17 abuts against the end face of the seal B16. The cylindrical surface of the valve core B17 and the spring seat B18 are hollow (as shown in FIG. 1 ). Figure 7 As shown), the fluids on both sides of the seal B16 can be connected through the two hollow positions;

[0044] A sealing cone B is provided at the end of the passive joint 15 close to the passive valve body 21. The outer diameter of the sealing cone B gradually increases in the direction away from the sealing member B16. The sealing cone B is inserted into the passive valve body 21. The sealing cone B and the sealing member B16 together form a sealing pair. The sealing force between the sealing cone B and the sealing member B16 is loaded by a spring B20. The spring B20 is installed between the passive valve body 21 and the spring seat B18.

[0045] like Figure 3 As shown, the local outer walls at both ends of the valve core A6 and the valve core B17 are clearance-matched with the inner walls of the active valve body 1 and the passive valve body 21 respectively; a certain gap is left between the outer end faces of the valve core A6 and the valve core B17 and the inner end faces of the active joint 7 and the passive joint 15, and a limit is formed after the seal A5 and the seal B16 produce an indentation of a certain depth.

[0046] Reference Figure 3 and Figure 4 The active joint 7 is used for the passive joint 15 to be inserted. The inner wall of the active joint 7 is provided with at least one O-ring 11. In this embodiment, two O-rings 11 are provided. As the passive joint 15 is inserted, the outer wall of the top of the passive joint 15 squeezes the O-ring 11. After overcoming the friction with the O-ring 11, the outer wall of the passive joint 15 is finally fitted with the two O-rings 11 at the same time to establish a double-stage redundant external seal. The seal between the active end and the passive end is completed only by the sealing of the O-ring 11, and the sealing structure is simple and has high reliability.

[0047] like Figure 5 As shown, the seal A5 and the seal B16 are convex outside and concave inside, and the concave parts provide fixation and support for the active ejector rod 10 and the passive ejector rod 14 respectively.

[0048] like Figure 1 and Figure 2 As shown, the inner wall of the active joint 7 is provided with threads, and the support ring A8 and the small locking nut A9 are connected therein through threads and locked with each other;

[0049] The inner wall of the passive joint 15 is provided with threads, and the support ring B13 and the small locking nut B12 are connected therein through threads and locked with each other.

[0050] like Figure 1 and Figure 2 As shown, the active push rod 10 is a slender rod with an umbrella-shaped disk at the head, the thin shaft at the head of the active push rod 10 is inserted into the seal A5, the umbrella-shaped disk contacts the end surface of the seal A5, and the stepped shaft at the tail of the active push rod 10 is inserted into the support ring A8, thereby achieving support and limitation of the active push rod 10; the passive push rod 14 is a slender rod with an umbrella-shaped disk at the head, the thin shaft at the head of the passive push rod 14 is inserted into the seal B16, the umbrella-shaped disk contacts the end surface of the seal B16, and the stepped shaft at the tail of the passive push rod 14 is inserted into the support ring B13, thereby achieving support and limitation of the passive push rod 14.

[0051] The specific workflow of this application is as follows:

[0052] The passive end of the on-orbit gas-liquid filling valve of the present invention is fixed to the filling bracket of the target satellite through the flange on the passive valve body 21; the active end of the on-orbit gas-liquid filling valve of the space is fixed to the feeding platform of the mechanical transmission system of the service satellite; the active end is axially aligned with the passive end and moves, and the passive joint 15 of the passive end is guided into the active end along the inner wall of the active joint 7 of the active end; the outer wall of the top of the passive joint 15 squeezes the O-ring 11 to overcome the friction with the O-ring 11, and the passive push rod 14 contacts the end face of the active push rod 10; the active end of the on-orbit gas-liquid filling valve of the space is further axially fed with the service satellite, and the active end of the active joint 15 is guided into the active end along the inner wall of the active joint 7 of the active end; the O-ring 11 is squeezed by the outer wall of the top of the passive joint 15 ... passive joint 15 is guided into the active end along the inner wall of the active joint 7 of the active end; the passive The active push rod 10 at the moving end pushes the seal A5, overcomes the spring force generated during the compression process of the spring A2, and drives the spring seat A4, the large locking nut A3 and the valve core A6 to move axially. At this time, the active end valve seat is disconnected from the seal A5, and the active end flow channel is opened; at the same time, the passive push rod 14 at the passive end of the space on-rail gas-liquid filling valve pushes the seal B16, overcomes the spring force generated during the compression process of the spring B20, and drives the spring seat B18, the large locking nut B19 and the valve core B17 to move axially. At this time, the passive end valve seat is disconnected from the seal B16, and the passive end flow channel is opened.

[0053] like Figure 4 After the right end face of the active joint 7 contacts the end face of the passive joint 15, the seals between the seal A5 and the active joint 7 and between the floating body B20 and the passive joint 15 are gradually released, the active end and the passive end are docked and plugged together, the fluid channels on both sides are connected, and the outer wall of the passive joint 15 is simultaneously fitted with the two O-rings 11 to establish a double-stage redundant external seal.

[0054] After the filling is completed, as the active end withdraws, spring A2 and spring B20 rebound, pushing seal A5 and seal B16 to reset, the fluid channels between the active end and the passive end are closed, and the active end and the passive end of the space on-orbit filling valve are separated.

[0055] The contents not described in detail in the present invention are well known to those skilled in the art.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A space on-orbit gas-liquid filling valve, characterized by: The invention comprises an active end connected to a filling container and a passive end connected to a filled container, wherein the active end comprises an active valve body (1), an active joint (7) connected to one end of the active valve body (1), a floating body A located in the active valve body (1), a spring A (2) and an active push rod (10), wherein the spring A (2) drives the floating body A to move toward the active joint (7) so that a seal is formed between the floating body A and the active joint (7); the active push rod (10) is used to push the floating body A so that the seal between the floating body A and the active joint (7) is released; the active joint (7) is used for the passive end to be inserted, and an O-ring (11) is provided on the inner wall of the active joint (7); The floating body A comprises a sealing member A (5), a valve core A (6), and a fixing member A for fixing the sealing member A (5) inside the valve core A (6); the valve core A (6) slides along the axial direction inside the active valve body (1); the middle section of the cylindrical surface of the valve core A (6) is hollowed out, and the sealing member A (5) is located at the hollowed-out portion inside the valve core A (6); The floating body B comprises a sealing member B (16), a valve core B (17), and a fixing member B for fixing the sealing member B (16) inside the valve core B (17); the valve core B (17) slides along the axial direction inside the passive valve body (21); the middle section of the cylindrical surface of the valve core B (17) is hollowed out, and the sealing member B (16) is located at the hollowed-out portion inside the valve core B (17); The fixing member A comprises a spring seat A (4) and a large locking nut A (3) located in the valve core A (6); the inner wall of the valve core A (6) is provided with a stop surface A for positioning the sealing member A (5); the spring seat A (4) and the large locking nut A (3) are located in sequence on a side of the sealing member A (5) away from the stop surface A; the large locking nut A (3) is connected to the valve core A (6) by threads; the large locking nut A (3) presses the spring seat A (4) and the sealing member A (5) on the stop surface A of the valve core A (6); and the cylindrical surface of the spring seat A (4) is hollowed out; The fixing member B comprises a spring seat B (18) and a large locking nut B (19) located in the valve core B (17). The inner wall of the valve core B (17) is provided with a stop surface B for positioning the sealing member B (16). The spring seat B (18) and the large locking nut B (19) are located in sequence on a side of the sealing member B (16) away from the stop surface B. The large locking nut B (19) is connected to the valve core B (17) by threads. The large locking nut B (19) presses the spring seat B (18) and the sealing member B (16) on the stop surface B of the valve core B (17). The cylindrical surface of the spring seat B (18) is hollowed out.

2. The space on-track gas-liquid filling valve according to claim 1 is characterized in that: The passive end comprises a passive valve body (21), a passive joint (15) connected to one end of the passive valve body (21), a floating body B arranged in the passive valve body (21), a spring B (20) and a passive push rod (14); the spring B (20) drives the floating body B to move in the direction of the passive joint (15) so that a seal is formed between the floating body B and the passive joint (15); and the passive push rod (14) is used to push the floating body B so that the seal between the floating body B and the passive joint (15) is released.

3. The space on-track gas-liquid filling valve according to claim 1 is characterized in that: The valve core A (6) is cylindrical, the middle section of the cylindrical surface of the valve core A (6) is hollowed out, and the sealing member A (5) is directly opposite to the hollowed out portion of the valve core A (6); the spring seat A (4) is cylindrical with a circular ring connected to one end, and the circular ring at the end of the spring seat A (4) abuts against the end surface of the sealing member A5; The valve core B (17) is cylindrical, the middle section of the cylindrical surface of the valve core B (17) is hollowed out, and the sealing member B (16) is directly opposite to the hollowed out portion in the valve core B (17); the spring seat B (18) is cylindrical with a circular ring connected to one end, and the circular ring at the end of the spring seat B (18) abuts against the end surface of the sealing member B (16).

4. The space on-track gas-liquid filling valve according to claim 1 is characterized in that: The middle part of the side of the seal A (5) facing away from the active joint (7) is convex, and the middle part of the side of the seal A (5) facing the active joint (7) is concave, and the concave part is used to fix and support the active push rod (10); The middle part of the side of the seal B (16) facing away from the passive joint (15) is convex, and the middle part of the side of the seal B (16) facing the passive joint (15) is concave, and the concave part is used to fix and support the passive ejector rod (14).

5. The space on-track gas-liquid filling valve according to claim 1 is characterized by: The active joint (7) is provided with a sealing cone A at the end close to the active valve body (1), and the outer diameter of the sealing cone A gradually increases in the direction away from the sealing member A (5), and the sealing cone A is inserted into the active valve body (1); A sealing cone B is provided at the end of the passive joint (15) close to the passive valve body (21). The outer diameter of the sealing cone B gradually increases in a direction away from the sealing member B (16). The sealing cone B is inserted into the passive valve body (21).

6. The space on-track gas-liquid filling valve according to claim 2 is characterized by: The inner wall of the active joint (7) is provided with threads, and the inner threads of the active joint (7) are connected with a support ring A (8) and a small locking nut A (9); The inner wall of the passive joint (15) is provided with threads, and the inner threads of the passive joint (15) are connected with a support ring B (13) and a small locking nut B (12).

7. The space on-track gas-liquid filling valve according to claim 6 is characterized by: The active push rod (10) is a slender rod with an umbrella-shaped disk at the head; the thin shaft at the head of the active push rod (10) is inserted into the sealing member A (5), the umbrella-shaped disk contacts the end surface of the sealing member A (5), and the stepped shaft at the tail of the active push rod (10) is inserted into the supporting ring A (8), thereby achieving support and position limiting of the active push rod (10).

8. The space on-track gas-liquid filling valve according to claim 6 is characterized by: The passive push rod (14) is a slender rod with an umbrella-shaped disk at the head; the thin shaft at the head of the passive push rod (14) is inserted into the sealing member B (16), the umbrella-shaped disk contacts the end surface of the sealing member B (16), and the stepped shaft at the tail of the passive push rod (14) is inserted into the supporting ring B (13), thereby achieving support and position limiting of the passive push rod (14).

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