Detachable inflation and deflation valve for buffer device

Abstract

The utility model relates to the technical field of aerospace, in particular to a detachable inflation and deflation valve for a buffer device, which comprises a one-way sealing valve and a manual-electric integrated control valve. The one-way sealing valve comprises a left valve body, a spring, a valve element assembly, a first gasket, a right valve body, a second gasket, a fourth O-shaped ring, a sealing plug cover and the like. The manual-electric integrated control valve comprises a control valve body, a valve rod, a check ring, an O-shaped ring, an electric actuating mechanism, a handle and the like. According to the scheme, components are simplified by adopting a detachable structure, and the maintenance efficiency is improved; a three-stage redundant sealing system (a hot-pressing valve core, a gasket and an O-shaped ring) is innovated, and the sealing reliability of the buffer device under the high-pressure working condition is enhanced; the manufacturing cost of the valve element is reduced through a hot-press forming process; and an electric turbine and manual double-control mode is adopted, intelligent operation is achieved, the emergency manual function is reserved, and the comprehensive performance and safety of the valve are remarkably improved. The overall design gives consideration to cost effectiveness, process optimization and operation redundancy guarantee.

Description

Technical Field

[0001] This utility model relates to the field of aerospace technology, and in particular to a detachable inflation / deflation valve for a buffer device. Background Technology

[0002] In the aerospace field, many aerospace companies are investing in the development of reusable rockets to reduce development costs. Before landing, to mitigate the powerful impact of the ground, landing legs are used for cushioning. Common landing legs employ a hydraulic-gas compression design, consisting of two chambers: an oil chamber and a gas chamber. Nitrogen gas in the gas chamber is compressed, slowly forcing oil from one chamber to the other. This necessitates the use of inflation valves to inflate the gas chamber. During landing, the pressure in the gas chamber increases instantaneously. At this rapid transition from low to high pressure, many inflation valve seals can collapse, leading to severe leaks and failing to provide cushioning. This can even result in damage to the rocket engine upon impact with the ground. Utility Model Content

[0003] The purpose of this invention is to provide a detachable inflation / deflation valve for a buffer device in order to solve the above-mentioned problems.

[0004] This utility model achieves the above objectives through the following technical solutions:

[0005] A detachable inflation / deflation valve for a buffer device includes a one-way sealing valve and a manual / electric integrated control valve;

[0006] The one-way sealing valve includes a left valve body, a spring, a valve core assembly, a first gasket, a right valve body, a second gasket, a fourth O-ring, and a sealing plug. The lower end of the left valve body is connected to a buffer device via a thread. The lower end face of the left valve body and the upper end face of the buffer device are sealed with a gasket, and a fourth O-ring is installed in the threaded relief groove. The left valve body has an internal channel. The left and right valve bodies are connected via a thread. The upper end face of the left valve body and the lower end face of the right valve body are sealed with a first gasket, and a third O-ring is installed in the threaded relief groove. The right valve body contains a valve core assembly with a channel. The right valve body has a sealing edge, and the valve core assembly has a sealing surface. When the valve is closed, the sealing surface of the valve core assembly and the right valve body form a sealing pair after contacting the sealing end face and conical surface of the right valve body. The left valve body has a spring inside the flow channel, which provides initial sealing force to the valve core assembly.

[0007] The manual-electric integrated control valve includes a control valve body, a valve stem, a retaining ring, an O-ring, an electric actuator, and a handle. The upper end of the one-way sealing valve is connected to the control valve body via a thread. The lower end face of the control valve body and the upper end face of the one-way sealing valve are sealed with gaskets, and an O-ring is installed in the threaded relief groove. The valve stem and the control valve body are connected via a thread, and the control valve body has an internal channel. The control valve body is connected to the electric actuator via an internal hexagonal screw, and the valve stem and the actuator are connected via a worm gear. The top of the valve stem is fixed to the handle and the valve stem with a Phillips head countersunk screw.

[0008] The gas-buffered device's detachable gas-filling / discharging valve is operated primarily by an electric actuator, with manual operation as a secondary method.

[0009] In the above technical solution, the internal channel of the left valve body and the channel of the buffer device are connected, and the internal cavity of the left valve body is much smaller than the internal cavity volume of the buffer device.

[0010] In the above technical solution, the seal between the left valve body of the one-way sealing valve and the buffer device is a double seal, namely a gasket and an O-ring.

[0011] In the above technical solution, the seal between the left and right valve bodies of the one-way sealing valve is a double seal, namely a first gasket and a third O-ring.

[0012] In the above technical solution, the left valve body and the valve core assembly of the one-way sealing valve are connected, and the minimum cross-sectional area of ​​the left valve body is less than or equal to the total cross-sectional area of ​​the valve core assembly.

[0013] In the above technical solution, the valve core assembly of the one-way sealing valve is formed by hot pressing between non-metal and metal components, and the inflation pressure is less than the initial sealing force provided by the spring.

[0014] In the above technical solution, the sealing surface of the right valve body of the one-way sealing valve is a plane + conical surface, and the sealing surface of the valve core assembly is a plane.

[0015] In the above technical solution, the cone angle of the sealing surface of the right valve body of the one-way sealing valve is between 7° and 10°.

[0016] In the above technical solution, the seal between the right valve body of the one-way sealing valve and the control valve body of the manual-electric integrated control valve is a double seal, namely a second gasket and a second O-ring.

[0017] In the above technical solution, the internal channel of the control valve body and the one-way sealing valve core assembly of the integrated hand-eye control valve are connected, and the cross-sectional area of ​​the open annular channel is larger than the cross-sectional area of ​​the internal channel of the control valve body in the integrated hand-eye control valve.

[0018] Compared with existing technologies, the beneficial effects are as follows:

[0019] This invention changes the traditional structural design by adopting a detachable structure, thereby reducing the number of product parts and improving the convenience of maintenance. The sealing system after disassembly employs a redundant design: the primary seal uses a thermo-pressed valve core seal, the secondary seal uses a gasket seal, and the tertiary seal uses an O-ring seal. This three-stage sealing structure improves the sealing performance and safety of the buffer device under a wide range of pressure conditions. The thermo-pressed valve core is manufactured using a thermo-pressing process, which, combined with other molding methods, reduces material waste and processing costs, thus lowering overall costs. The system uses a combination of an electric turbine head and a handle for control; the electric control improves manual convenience and allows for manual operation in case of electric failure, enhancing the reliability of the valve. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the one-way sealing valve structure of a detachable inflation / deflation valve for a buffer device according to the present invention.

[0022] Figure 2 This is a schematic diagram of the hand-operated electric control valve structure of a detachable inflation / deflation valve for a buffer device according to the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of the detachable inflation / deflation valve of the buffer device described in this utility model before inflation.

[0024] Figure 4 This is a schematic diagram of the fully open state of the detachable inflation / deflation valve of the buffer device described in this utility model.

[0025] Figure 5 This is a schematic diagram of the detachable inflation / deflation valve of the buffer device described in this utility model, showing the valve in its closed state after inflation.

[0026] The annotations in the attached figures are explained as follows:

[0027] 1. Left valve body; 2. Spring; 3. Valve core assembly; 4. First gasket; 5. Right valve body; 6. Second gasket; 7. Valve stem; 8. Retaining ring; 9. Valve body; 10. Handle; 12. Cross-head countersunk screw; 13. Socket head cap screw; 15. First O-ring; 16. Second O-ring; 17. Third O-ring; 18. Fourth O-ring; 19. Sealing plug; 20. Electric actuator. Detailed Implementation

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] like Figures 1-5 As shown, a detachable inflation / deflation valve for a buffer device includes a one-way sealing valve and a manual / electric integrated control valve.

[0031] The one-way sealing valve includes a left valve body 1, a spring 2, a valve core assembly 3, a first gasket 4, a right valve body 5, a second gasket 6, a fourth O-ring 18, and a sealing plug 19. The lower end of the left valve body 1 is connected to the buffer device via a thread. To prevent seizing when the same material is threaded together, the connecting parts of the left valve body 1 and the buffer device are made of the same material but different grades of stainless steel. The lower end face of the left valve body 1 and the upper end face of the buffer device are sealed with a gasket, which can be made of aluminum or copper. The fourth O-ring 18, made of NBR rubber, is installed in the threaded relief groove. The left valve body 1 has an internal channel that communicates with the channel of the buffer device. The internal cavity of the left valve body 1 is much smaller than the internal cavity of the buffer device. The left valve body 1 and the right valve body 5 are connected via a thread. The upper end face of the left valve body 1 and the lower end face of the buffer device are sealed with the first gasket 4, which can be made of aluminum or copper. The third O-ring 17, made of rubber, is installed in the threaded relief groove. NBR; The right valve body 5 contains a valve core assembly 3, which is formed by hot pressing between non-metal and metal. The non-metal material is polyimide or other heat-pressable materials, and the metal substrate is stainless steel. The valve core assembly 3 has a channel, which is connected to the channel of the left valve body 1 of the one-way sealing valve. The minimum cross-sectional area of ​​the channel of the left valve body 1 is less than or equal to the cross-sectional area of ​​the valve core channel. The right valve body 5 has a sealing edge, and the sealing surface is a plane + conical surface with a conical angle of 7° to 10°. The valve core assembly 3 has a sealing surface, which is a plane and polished. When the valve is closed, the sealing surface of the valve core assembly 3 and the right valve body 5 are in contact with the sealing end face and conical surface of the right valve body 5 to form a sealing pair. The flow channel of the left valve body 1 contains a spring 2, which provides the initial sealing force to the valve core assembly 3.

[0032] according to Figure 1 As shown, the sealing method of the one-way valve adopts a redundant design. The first stage of sealing uses a valve core seal in the form of hot pressing, the second stage of sealing uses a gasket seal, and the third stage of sealing uses an O-ring seal. The three-stage sealing structure improves the sealing performance and safety of the buffer device under a wide range of pressure conditions. The hot pressing valve core is manufactured using a hot pressing process, which, along with other molding methods, reduces material waste and processing costs, thereby reducing costs.

[0033] The manual-electric integrated control valve includes a control valve body 9, a valve stem 7, a retaining ring 8, an O-ring, an electric actuator 20, and a handle 10. The upper end of the one-way sealing valve is connected to the control valve body 9 via a thread. To prevent seizing when the same materials are screwed together, the valve bodies 9 of both the one-way sealing valve and the manual-electric integrated control valve are made of the same material, but different grades of stainless steel. The lower end face of the control valve body 9 and the upper end face of the one-way sealing valve are sealed with gaskets, which can be made of aluminum or copper. An O-ring made of NBR rubber is installed in the threaded relief groove. The valve stem 7 and the control valve body 9 are connected via a thread. To prevent seizing when the same materials are screwed together, the control valve body 9 of the manual-electric integrated control valve... The material is stainless steel, and the valve stem 7 of the integrated manual / electric control valve is made of precipitated stainless steel. The valve body 9 has an internal channel that connects to the annular channel of the one-way sealing valve core assembly 3. The cross-sectional area of ​​the annular channel is larger than that of the internal channel of the valve body 9 in the integrated manual / electric control valve. The internal channel of the valve body 9 and the valve stem 7 are connected by a retaining ring 8 and a first O-ring 15. The valve body 9 is connected to the electric actuator 20 via a connector. The valve stem 7 and the actuator are connected by a worm gear. The top end is fixed to the handle 10 and the valve stem 7 via a connector. The seal between the right valve body 5 of the one-way sealing valve and the valve body 9 of the integrated manual / electric control valve is a double seal, consisting of a second gasket 6 and a second O-ring 16. The internal channel of the valve body 9 in the integrated manual / electric control valve connects to the annular channel of the one-way sealing valve core assembly 3. The cross-sectional area of ​​the annular channel is larger than that of the internal channel of the valve body 9 in the integrated manual / electric control valve. The electric actuator 20 actuates the valve stem 7 to open the valve core assembly 3 for inflation. After inflation is complete, the electric actuator 20 actuates the valve stem 7 to close the valve core by relying on the initial sealing force of the spring 2. Then, the control valve body 9 in the manual-electric integrated control valve is removed and the sealing plug 19 is installed.

[0034] The gas buffer device features a detachable charging / discharging valve for charging and discharging operations. It employs a combination of an electric turbine head and a handle 10 for control, primarily driven by an electric actuator 20, with manual operation as a secondary function. The electric control method improves ease of operation, allowing for manual operation in case of electric failure, thus enhancing the valve's reliability.

[0035] Working principle:

[0036] 1. Inflation process:

[0037] Electric drive mode:

[0038] The electric actuator 20 is activated, which drives the valve stem 7 downward through the worm gear transmission, thus opening the valve core assembly 3 in the one-way sealing valve.

[0039] The sealing surface of the valve core assembly 3 separates from the conical and planar sealing surfaces of the right valve body 5, forming an annular channel. At this time, the external air source enters the one-way sealing valve through the internal channel of the control valve body 9 of the manual-electric integrated control valve, flows through the channel of the valve core assembly 3 and the internal channel of the left valve body 1, and finally fills the inner cavity of the buffer device.

[0040] After inflation is complete, the electric actuator 20 reverses its action, the valve stem 7 resets under the initial sealing force of the spring 2, and the sealing pair between the valve core assembly 3 and the right valve body 5 closes again, blocking the airflow.

[0041] Manual standby mode:

[0042] If the electric actuator fails, the valve core assembly 3 can be manually opened by rotating the handle 10 to drive the valve stem 7, thus completing the inflation operation.

[0043] 2. Degassing process:

[0044] Valve disassembly and seal switching:

[0045] Remove the integrated hand-held control valve and install the sealing plug 19 onto the upper end of the one-way sealing valve. At this time, the gas in the buffer device can be released through the channel between the left valve body 1 and the valve core assembly 3.

[0046] The sealing pair of valve core assembly 3 remains closed under the continuous pressure of spring 2 to prevent accidental leakage. After deflation, reinstalling the manual / electric integrated control valve will restore the inflation function.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A detachable inflation / deflation valve for a buffer device, characterized in that: Including one-way sealing valves and manual / electric integrated control valves; The one-way sealing valve includes a left valve body (1), a spring (2), a valve core assembly (3), a first gasket (4), a right valve body (5), a second gasket (6), a fourth O-ring (18), and a sealing plug (19); the lower end of the left valve body (1) is connected to the buffer device by a thread, and the lower end face of the left valve body (1) and the upper end face of the buffer device are sealed by a gasket, and the fourth O-ring (18) is installed in the threaded relief groove; the left valve body (1) has an internal channel; the left valve body (1) and the right valve body (5) are connected by a thread, and the upper end face of the left valve body (1) and the lower end face of the right valve body (5) are sealed by a gasket. The first gasket (4) is used for sealing, and a third O-ring (17) is installed in the threaded relief groove; the right valve body (5) is equipped with a valve core assembly (3), the valve core assembly (3) is provided with a channel, the right valve body (5) is provided with a sealing edge, and the valve core assembly (3) is provided with a sealing surface. When the valve is closed, the sealing surface of the valve core assembly (3) and the right valve body (5) are connected to the sealing end face and the conical surface of the right valve body (5) to form a sealing pair; the flow channel of the left valve body (1) is equipped with a spring (2), and the spring (2) provides the initial sealing force to the valve core assembly (3); The manual-electric integrated control valve includes a control valve body (9), a valve stem (7), a retaining ring (8), an O-ring, an electric actuator (20), and a handle (10). The upper end of the one-way sealing valve is connected to the control valve body (9) by a thread. The lower end face of the control valve body (9) and the upper end face of the one-way sealing valve are sealed with a gasket, and an O-ring is installed in the threaded relief groove. The valve stem (7) and the control valve body (9) are connected by a thread. The control valve body (9) has a channel inside. The control valve body (9) is connected to the electric actuator (20) by an internal hexagonal screw (13). The valve stem (7) and the actuator are connected by a worm gear. The top of the valve stem (7) is fixed to the handle (10) and the valve stem (7) by a cross-slot countersunk screw (12). The gas-buffered device's detachable gas-filling and gas-filling valve is operated primarily by an electric actuator (20), with manual operation as a secondary method.

2. A detachable inflation / deflation valve for a buffer device according to claim 1, characterized in that: The internal channel of the left valve body (1) is connected to the channel of the buffer device, and the internal cavity of the left valve body (1) is much smaller than the internal cavity volume of the buffer device.

3. A removable inflation / deflation valve for a cushioning device according to claim 1, wherein: The seal between the left valve body (1) of the one-way sealing valve and the buffer device is a double seal, namely a gasket and an O-ring.

4. A removable inflation / deflation valve for a cushioning device according to claim 1, wherein: The seal between the left valve body (1) and the right valve body (5) of the one-way sealing valve is a double seal, namely a first gasket (4) and a third O-ring (17).

5. A removable inflation / deflation valve for a cushioning device according to claim 1, wherein: The left valve body (1) and valve core assembly (3) of the one-way sealing valve are connected, and the minimum cross-sectional area of ​​the left valve body (1) is less than or equal to the total cross-sectional area of ​​the valve core channel.

6. A detachable inflation / deflation valve for a buffer device according to claim 1, characterized in that: The valve core assembly (3) of the one-way sealing valve is formed by hot pressing between non-metal and metal, and the inflation pressure is less than the initial sealing force provided by the spring (2).

7. A detachable inflation / deflation valve for a buffer device according to claim 1, characterized in that: The sealing surface of the right valve body (5) of the one-way sealing valve is a plane + conical surface, and the sealing surface of the valve core assembly (3) is a plane.

8. A removable inflation / deflation valve for a cushioning device according to claim 1, wherein: The cone angle of the sealing surface of the right valve body (5) of the one-way sealing valve is between 7° and 10°.

9. A detachable inflation / deflation valve for a buffer device according to claim 1, characterized in that: The seal between the right valve body (5) of the one-way sealing valve and the control valve body (9) of the manual-electric integrated control valve is a double seal, namely a second gasket (6) and a second O-ring (16).

10. A removable inflation / deflation valve for a cushioning device according to claim 1, wherein: The internal channel of the control valve body (9) in the integrated hand-held and electric control valve is connected to the opening annular channel of the one-way sealing valve core assembly (3), and the cross-sectional area of ​​the opening annular channel is larger than the cross-sectional area of ​​the internal channel of the control valve body (9) in the integrated hand-held and electric control valve.

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