A total immersion ultra-low temperature disc valve

Abstract

The utility model discloses a kind of full-immersion ultra-low temperature disc valves, belong to fluid control equipment technical field, for the technical problem of weight of full-immersion butterfly valve in prior art is relatively heavy, flow resistance is big, and the actuator of full-immersion butterfly valve is not soaked in low-temperature medium, there is the technical problem of difficult to use, the utility model discloses a valve body, valve shaft, butterfly plate, pedestal, actuator and sealing cavity, the valve shaft is through the valve body, the butterfly plate is installed in the middle part of the valve shaft, the pedestal is installed in the corresponding position of the butterfly plate, and is sealed with the cooperation of the butterfly plate, the sealing cavity is located at the top of the valve body, all actuators are fixedly arranged in the sealing cavity, and the output end of the actuator is connected with the valve shaft.

Description

Technical Field

[0001] This utility model belongs to the field of fluid control equipment technology, specifically relating to a fully immersed cryogenic disc valve. Background Technology

[0002] Valves are an indispensable part of rocket recovery systems, used to control propellant flow, regulate pressure, and manage the operation of various fluid systems.

[0003] In the existing technology, fully immersed butterfly valves are commonly used as valves in rocket recovery systems.

[0004] The existing technology has the following technical problems: 1. Fully immersed butterfly valves are relatively heavy. Since rocket launch requires a large amount of energy, the overall weight of fully immersed butterfly valves must be light.

[0005] 2. Fully immersed butterfly valves have high flow resistance. Since the distribution ratio of liquid oxygen and liquid methane after rocket ignition is crucial for the complete combustion of methane, the flow resistance of the valve affects the flow rate of liquid oxygen or liquid methane.

[0006] 3. The actuator of a fully immersed butterfly valve is not immersed in a low-temperature medium, which may make it difficult to use. Utility Model Content

[0007] In view of the technical problems of the above-mentioned existing technologies, such as the heavy weight and high flow resistance of fully immersed butterfly valves, and the technical problems of the actuator of fully immersed butterfly valves not being immersed in the low temperature medium, which makes them difficult to use, this utility model provides a fully immersed cryogenic butterfly valve.

[0008] The technical solution adopted in this utility model is as follows: A fully immersed cryogenic butterfly valve includes: a valve body, a valve shaft, a butterfly plate, a base, an actuator, and a sealing cavity. The valve shaft passes through the valve body, the butterfly plate is installed in the middle of the valve shaft, and the base is installed at the corresponding position of the butterfly plate to form a seal with the butterfly plate. The sealing cavity is located at the top of the valve body, and all actuators are fixedly installed in the sealing cavity. The output end of the actuator is connected to the valve shaft.

[0009] The beneficial effects of this utility model by adopting the above technical solution are as follows: By placing the actuator in a sealed cavity, this utility model avoids direct exposure to low-temperature environments, preventing icing and freezing blockage, and improving the reliability and service life of the actuator. Furthermore, the separate design of the actuator and the main valve body facilitates replacement and maintenance while maintaining the structural integrity of the main valve body.

[0010] Furthermore, the sealing contact surface structure between the butterfly plate and the base described above is a two-way sealing structure.

[0011] The beneficial effects of this utility model by adopting the above technical solution are as follows: This utility model can achieve sealing under both forward and reverse pressure, adapting to the complex working conditions of frequent flow switching in rocket fuel systems.

[0012] Furthermore, the actuator described above is a cylinder assembly.

[0013] The beneficial effects of this utility model by adopting the above technical solution are as follows: the pneumatic actuator of this utility model operates rapidly, making it suitable for aerospace fuel control scenarios that require rapid opening and closing. Furthermore, it can be remotely operated via air source control.

[0014] Furthermore, the aforementioned cylinder assembly includes: a cylinder housing, a first piston, a second piston, a piston rod, a pressure adjusting spring, and a drive handle; the piston rod is located inside the cylinder housing, the first piston and the second piston both pass through the piston rod and are located at opposite ends of the piston rod, one end of the pressure adjusting spring is connected to the first piston, the other end of the pressure adjusting spring is fixedly connected to the cylinder housing, one end of the drive handle is connected to the middle of the piston rod, and the other end of the drive handle is connected to the valve shaft.

[0015] The beneficial effects of this utility model by adopting the above technical solution are as follows: This utility model can automatically adjust the piston pressure through the pressure regulating spring, compensate for air source fluctuations, and improve the stability of the actuator.

[0016] Furthermore, the cylinder shell described above is made of aluminum alloy.

[0017] The beneficial effects of adopting the above technical solution are as follows: the aluminum alloy of this utility model has low density, which reduces the overall weight and meets the requirements of aerospace systems for lightweighting.

[0018] Furthermore, a double static sealing structure is provided between the valve shaft and the valve body as described above.

[0019] The beneficial effects of this utility model by adopting the above technical solution are as follows: the double sealing structure of this utility model can effectively prevent the leakage of cryogenic media such as liquid oxygen and liquid hydrogen from the valve shaft, thereby improving safety.

[0020] Furthermore, the sidewall of the aforementioned sealed cavity is provided with a medium balance hole.

[0021] The beneficial effects of this utility model by adopting the above technical solution are as follows: This utility model reduces the pressure fluctuation inside the sealing cavity by using the medium balance hole, removes air or bubbles from the sealing cavity, and ensures the normal operation of the actuator.

[0022] Furthermore, the aforementioned butterfly plate is a low-flow-resistance curved surface.

[0023] The beneficial effects of this invention, achieved by adopting the above technical solution, are as follows: the curved surface design reduces fluid disturbance, lowers flow resistance, and improves fuel delivery efficiency. Furthermore, the butterfly plate shape is optimized through CFD simulation, resulting in smoother fluid control.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. This utility model places the actuator in a sealed cavity, avoiding direct exposure to low-temperature environments, preventing icing and blockage, and improving the reliability and service life of the actuator. Furthermore, the separate design of the actuator and the main valve body facilitates replacement and maintenance while maintaining the structural integrity of the main valve body.

[0025] 2. This utility model's pneumatic actuator operates rapidly, making it suitable for aerospace fuel control scenarios requiring quick opening and closing. Furthermore, it can be remotely operated via a gas source.

[0026] 3. The double sealing structure of this utility model can effectively prevent the leakage of cryogenic media such as liquid oxygen and liquid hydrogen from the valve shaft, thus improving safety.

[0027] 4. The curved surface design of this invention reduces fluid disturbance, lowers flow resistance, and improves fuel delivery efficiency. Furthermore, the butterfly plate shape is optimized through CFD simulation to achieve smoother fluid control. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of the structure of a fully immersed cryogenic disc valve according to Embodiment 1 of this utility model; Figure 2 This is a structural schematic diagram of the cylinder assembly provided according to Embodiment 1 of this utility model.

[0029] Reference numerals: 1. Valve body; 2. Valve shaft; 3. Butterfly plate; 4. Base; 5. Actuator; 501. Drive handle; 6. Sealing cavity; 601. Medium balance hole; 7. Cylinder housing; 8. First piston; 9. Second piston; 10. Piston rod; 11. Pressure adjusting spring. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0033] like Figure 1 As shown, this embodiment provides a fully immersed cryogenic butterfly valve, including: a valve body 1, a valve shaft 2, a butterfly plate 3, a base 4, an actuator 5, and a sealing cavity 6. The valve shaft 2 passes through the valve body 1, the butterfly plate 3 is installed in the middle of the valve shaft 2, and the base 4 is installed at the corresponding position of the butterfly plate 3 to form a seal with the butterfly plate 3. The sealing cavity 6 is located at the top of the valve body 1, and all actuators 5 are fixedly installed in the sealing cavity 6. The output end of the actuator 5 is connected to the valve shaft 2.

[0034] In this embodiment, the surface of the butterfly plate 3 is coated with an ultra-low temperature anti-embrittlement coating to enhance its durability and impact resistance in environments below -196°C.

[0035] In summary, this invention places the actuator 5 within the sealed cavity 6, avoiding direct exposure to low-temperature environments, preventing icing and blockage, and improving the reliability and service life of the actuator 5. Furthermore, the separate design of the actuator 5 from the main valve body 1 facilitates replacement and maintenance while maintaining the structural integrity of the main valve body 1.

[0036] Optionally, the sealing contact surface structure between the butterfly plate 3 and the base 4 is a bidirectional sealing structure.

[0037] In this embodiment, the first sealing surface is a hard metal seal; the second sealing surface is a low-temperature corrosion-resistant elastic sealing layer; the bidirectional sealing structure can achieve stable sealing under both positive and negative pressure conditions, adapting to the complex environment of frequent opening and closing and pressure fluctuations in the rocket fuel system.

[0038] In summary, this invention can achieve sealing under both forward and reverse pressure, adapting to the complex operating conditions of frequent flow direction switching in rocket fuel systems.

[0039] Optionally, the actuator 5 is a cylinder assembly.

[0040] In this embodiment, the actuator 5 is also equipped with a remote control interface, which can be integrated with the rocket control system to realize automatic control and status feedback.

[0041] In summary, the pneumatic actuator 5 of this invention operates rapidly, making it suitable for aerospace fuel control scenarios requiring quick opening and closing. Furthermore, it can be remotely operated via air source control.

[0042] Optionally, the cylinder assembly includes: a cylinder housing 7, a first piston 8, a second piston 9, a piston rod 10, a pressure regulating spring 11, and a drive handle 501; the piston rod 10 is located inside the cylinder housing 7, the first piston 8 and the second piston 9 both pass through the piston rod 10 and are located at both ends of the piston rod 10 respectively, one end of the pressure regulating spring 11 is connected to the first piston 8, the other end of the pressure regulating spring 11 is fixedly connected to the cylinder housing 7, one end of the drive handle 501 is connected to the middle of the piston rod 10, and the other end of the drive handle 501 is connected to the valve shaft 2.

[0043] In this embodiment, a pressure feedback sensor is also included to monitor the working pressure of actuator 5 in real time.

[0044] In summary, this utility model can automatically adjust the piston pressure through the pressure regulating spring 11, compensate for air source fluctuations, and improve the stability of the actuator 5.

[0045] Optionally, the cylinder housing 7 is made of aluminum alloy.

[0046] In this embodiment, the cylinder housing 7 is made of high-strength, lightweight aluminum alloy and has undergone surface anodizing treatment.

[0047] In summary, the aluminum alloy of this invention has a low density, which reduces the overall weight and meets the lightweight requirements of aerospace systems.

[0048] Optionally, a double static sealing structure is provided between the valve shaft 2 and the valve body 1.

[0049] In this embodiment, the outer layer is a metal bellows seal; the inner layer is a low-temperature elastic sealing ring; the double sealing structure effectively prevents the leakage of low-temperature medium, while ensuring the flexible rotation of valve shaft 2.

[0050] In summary, the double sealing structure of this utility model can effectively prevent the leakage of cryogenic media such as liquid oxygen and liquid hydrogen from the valve shaft 2, thereby improving safety.

[0051] Optionally, the sidewall of the sealing cavity 6 is provided with a medium balancing hole 601.

[0052] In summary, this utility model reduces pressure fluctuations inside the sealing cavity 6 by using the medium balance hole 601, eliminates air or bubbles inside the sealing cavity 6, and ensures the normal operation of the actuator 5.

[0053] Optionally, the butterfly plate 3 is a low-flow-resistance curved surface.

[0054] In summary, the curved surface design of this invention reduces fluid disturbance, lowers flow resistance, and improves fuel delivery efficiency. Furthermore, the shape of the butterfly plate 3 is optimized through CFD simulation, achieving smoother fluid control.

[0055] Working principle

[0056] This invention provides a fully immersed butterfly valve suitable for cryogenic media (such as liquid oxygen and liquid hydrogen) environments. It primarily uses an actuator 5 to drive the valve shaft 2 to rotate, which in turn causes the butterfly plate 3 to rotate within the valve body 1, thereby controlling the flow of the medium or regulating its flow rate. Its core working principle is as follows: 1. Actuator 5 driving principle: The actuator 5 is a cylinder assembly with a double piston structure and a pressure regulating spring 11 inside. It drives the piston rod 10 to move by compressing gas.

[0057] The piston rod 10 drives the drive handle 501, which is connected to the valve shaft 2 to achieve mechanical transmission.

[0058] The pressure regulating spring 11 can automatically adjust the piston pressure, compensate for air source fluctuations, and improve the stability and response accuracy of the actuator 5.

[0059] 2. Opening and closing principle of butterfly plate 3: The butterfly plate 3 is installed in the middle of the valve shaft 2, and opens or closes the valve as the valve shaft 2 rotates.

[0060] The butterfly plate 3 adopts a low flow resistance curved surface design, which is basically parallel to the flow channel when it is open, reducing fluid resistance and improving flow efficiency.

[0061] A two-way sealing structure is provided between the butterfly plate 3 and the base 4, which can achieve sealing under both positive and negative pressure to prevent leakage.

[0062] 3. Sealing protection principle: A double static sealing structure (metal bellows + low-temperature elastic sealing ring) is provided between valve shaft 2 and valve body 1 to prevent low-temperature medium leakage.

[0063] The actuator 5 is installed inside the sealed cavity 6 to avoid direct exposure to the ultra-low temperature medium and prevent freezing and blockage.

[0064] The side wall of the sealing cavity 6 is provided with a medium balance hole 601, which is used to balance the pressure inside and outside the sealing cavity 6 and prevent the seal from failing due to pressure difference.

[0065] Workflow

[0066] The working process of this butterfly valve in the rocket fuel system is as follows: 1. Initial state (off state): The butterfly plate 3 is tightly fitted to the base 4 and is in the closed position.

[0067] The two-way sealing structure ensures zero leakage even under high pressure differential.

[0068] Actuator 5 cylinder is in the reset state, and piston rod 10 remains stationary.

[0069] 2. Actuator 5 starts (opens the valve): The control system sends an activation signal to supply air to the cylinder.

[0070] Gas pushes the first piston 8 and the second piston 9, which in turn drives the piston rod 10 to move.

[0071] The piston rod 10 drives the valve shaft 2 to rotate via the drive handle 501, and the butterfly plate 3 rotates accordingly.

[0072] The pressure regulating spring 11 automatically adjusts the pressure to compensate for fluctuations in the air supply and ensure smooth start-up.

[0073] The pressure feedback sensor monitors the cylinder pressure in real time and feeds the data back to the control system.

[0074] 3. Butterfly plate 3 is open (medium flow): The butterfly plate 3 is rotated to the open position, parallel to the flow channel, forming a low flow resistance channel.

[0075] Cryogenic media (such as liquid oxygen or liquid hydrogen) flow to the engine or other systems through valves.

[0076] The CFD-optimized disc shape ensures smooth fluid flow, reducing disturbances and energy consumption.

[0077] 4. Actuator 5 resets (closes the valve): The control system sends a shutdown signal, cutting off the gas supply and venting the gas.

[0078] The pressure regulating spring 11 resets, pushes the piston back to its original position, and drives the butterfly plate 3 to rotate to the closed position.

[0079] The butterfly plate 3 and the base 4 are then reattached, and the two-way sealing structure ensures a tight seal when closed.

[0080] 5. Status monitoring and feedback: The pressure feedback sensor continuously monitors the working status of actuator 5.

[0081] The remote control interface feeds back the valve status (open / closed, pressure, temperature) to the rocket control system to achieve closed-loop control.

[0082] If an anomaly is detected (such as a leak or pressure imbalance), the control system can promptly issue an alarm or trigger an emergency shutdown mechanism.

[0083] The above description is only a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions and improvements made by those skilled in the art within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A fully immersed cryogenic disc valve, characterized in that, include: The valve body comprises a valve shaft, a butterfly plate, a base, actuators, and a sealing cavity. The valve shaft passes through the valve body, the butterfly plate is installed in the middle of the valve shaft, and the base is installed at the corresponding position of the butterfly plate to form a seal with the butterfly plate. The sealing cavity is located at the top of the valve body, and all actuators are fixedly installed in the sealing cavity. The output end of the actuator is connected to the valve shaft.

2. The fully immersed cryogenic disc valve according to claim 1, characterized in that, The sealing contact surface structure between the butterfly plate and the base is a two-way sealing structure.

3. The fully immersed cryogenic disc valve according to claim 1, characterized in that, The actuator is a cylinder assembly.

4. The fully immersed cryogenic disc valve according to claim 3, characterized in that, The cylinder assembly includes: a cylinder housing, a first piston, a second piston, a piston rod, a pressure adjusting spring, and a drive handle; the piston rod is located inside the cylinder housing, the first piston and the second piston both pass through the piston rod and are located at opposite ends of the piston rod, one end of the pressure adjusting spring is connected to the first piston, the other end of the pressure adjusting spring is fixedly connected to the cylinder housing, one end of the drive handle is connected to the middle of the piston rod, and the other end of the drive handle is connected to the valve shaft.

5. The fully immersed cryogenic disc valve according to claim 4, characterized in that, The cylinder shell is made of aluminum alloy.

6. The fully immersed cryogenic disc valve according to claim 1, characterized in that, The valve shaft and valve body are provided with a double static sealing structure.

7. The fully immersed cryogenic disc valve according to claim 1, characterized in that, The sidewall of the sealed cavity is provided with a medium balance hole.

8. The fully immersed cryogenic disc valve according to claim 1, characterized in that, The butterfly plate is a low-resistance curved surface.

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