Ultra-light micro-valve based on dual shape memory alloy wire driving structure

Abstract

The utility model discloses a kind of ultra-light micro air valves based on double shape memory alloy wire driving structure, including valve body, shape memory alloy wire structure, state switching assembly, lower air valve cover and upper air valve cover;State switching assembly includes installation base, traction piece, soft body plunger and plunger fixing piece;Installation base is fixed in the lower portion of valve body inner cavity, traction piece is located in valve body inner cavity and lower end is connected with installation base lower portion, the upper end of traction piece is connected with soft body plunger by plunger fixing piece, soft body plunger is embedded in the one end of air valve gas outlet hole adjacent valve body inner cavity and can be along air valve gas outlet hole axial reciprocating microshift;Shape memory alloy wire structure includes two shape memory alloy wires;Two shape memory alloy wires are distributed in valve body two sides, and one end is connected with traction piece middle part, and the other end is connected with installation buckle located on the side wall of valve body.Two shape memory alloy wires contract by alternate energization, give air valve high frequency response capability, have excellent pressure-bearing capacity under high pressure working condition.

Description

Technical Field

[0001] This utility model relates to the field of micro valve technology, specifically to an ultra-lightweight air valve based on a dual shape memory alloy wire drive structure. Background Technology

[0002] Miniature indoor airship robots, with their excellent compliance, adaptability, and human-robot interaction safety, have enormous application potential in fields such as confined space exploration. They feature low noise, long endurance, and stable hovering, making them an ideal platform for large-scale indoor monitoring. However, miniature indoor airship robots rely on the cooperation of multiple drive structures to achieve free movement. Traditional drive structures are relatively heavy, and the spatial structure and accumulated weight of multiple drives significantly reduce the robot's load capacity, severely impacting its mobility and power consumption, and leading to unavoidable functional limitations.

[0003] To meet the demands for miniaturization and lightweighting of micro indoor airship robots, various micro valve structures with different drive methods have emerged. For example, the micro air valves disclosed in utility model applications CN212455695U and CN214466177U, and invention application CN114983369A, all employ electromagnetic drive. While optimizing the electromagnetic coil and valve body layout has achieved a degree of structural compactness, the use of metal components such as the iron core still results in a relatively large overall weight, limiting their application in ultra-lightweight scenarios. The invention patent CN109185555B uses a micro DC motor as the drive source and leverages 3D printing technology to initially achieve miniaturization and lightweighting of the valve body, but it remains difficult to apply to situations with extremely high weight requirements, leaving room for further weight reduction.

[0004] The utility model disclosed in CN219176954U is a miniature air valve driven by the thermally induced phase change characteristics of shape memory alloy (SMA). The driving unit is simplified to a single SMA wire and combined with a lightweight valve body, achieving preliminary simplification and weight reduction of the structure. The reset mechanism of this type of shape memory alloy wire driven air valve generally relies on internally added elastic elements such as springs. The valve core needs to wait for the shape memory alloy wire to be de-energized, cooled, and contracted before it can be pulled back and the air valve closed by the elastic element. Its phase change cooling process usually takes several seconds, resulting in a slow response speed of existing air valves using shape memory alloy wire. At the same time, the overall structure is relatively complex, and there are technical challenges in assembly. These shortcomings seriously restrict the widespread application of this type of air valve in flexible driving systems with high response speed requirements.

[0005] Therefore, there is an urgent need to develop an ultra-lightweight air valve that is simple in structure, easy to assemble, resistant to high pressure, high precision, and capable of high-frequency and rapid response. Using new intelligent materials such as shape memory alloys (SMA) to replace traditional mechanical transmission mechanisms and construct lightweight drive units has become an important direction for technological development. Utility Model Content

[0006] The purpose of this invention is to address the limitations of current technologies by providing an ultra-lightweight air valve based on a dual shape memory alloy wire drive structure. This air valve employs a complementary traction drive structure with dual shape memory alloy wires (i.e., a state switching component driven by two alloy wires), supplemented by a self-locking traction component. While maintaining the air valve's lightweight and miniaturized characteristics, it reduces energy consumption. Furthermore, it replaces the passively responding elastic reset elements such as springs in existing technologies with actively responsive shape memory alloy wires, achieving high-frequency, rapid response by eliminating reset delay. Simultaneously, the air outlet guide channel effectively reduces airflow impact and driving resistance, further shortening the energizing time of the shape memory alloy wires, and further improving response speed and energy efficiency.

[0007] The technical solution adopted by this utility model to solve the aforementioned technical problem is: An ultra-lightweight air valve based on a dual shape memory alloy wire drive structure is characterized by comprising a valve body, a shape memory alloy wire structure, a state switching component, a lower air valve cover, and an upper air valve cover; the upper air valve cover and the lower air valve cover are located at the top and bottom of the valve body, and air valve outlet holes and air valve inlet holes are symmetrically arranged on both sides of the upper part of the valve body. The state switching component includes a mounting base, a traction component, a soft plunger, and a plunger connector. The mounting base is fixed to the lower part of the valve body cavity. The traction component is located in the valve body cavity and its lower end is connected to the lower part of the mounting base. The upper end of the traction component is connected to the soft plunger through the plunger connector. The soft plunger is embedded in the end of the air valve outlet near the valve body cavity and can reciprocate slightly along the axial direction of the air valve outlet. The shape memory alloy wire structure includes two shape memory alloy wires; the two shape memory alloy wires are distributed on both sides of the valve body, with one end connected to the middle of the traction component and the other end connected to the mounting buckle located on the side wall of the valve body.

[0008] Furthermore, the air valve outlet is circumferentially distributed with multiple air valve outlet guide channels, one end of which can communicate with the air valve outlet and the other end of which can communicate with the valve body cavity; the air valve inlet is circumferentially distributed with multiple air valve inlet guide channels, one end of which can communicate with the air valve inlet and the other end of which can communicate with the valve body cavity.

[0009] Furthermore, the angle between the air valve outlet guide channel and the air valve outlet is 30~60°, and the diameter of the air valve outlet guide channel is 0.35~0.65mm.

[0010] Furthermore, the angle between the air valve inlet guide channel and the air valve inlet is 30~60°, and the diameter of the air valve inlet guide channel is 0.35~0.65mm.

[0011] Furthermore, the upper part of the mounting base is provided with a traction member deformation maintenance slot. Under the action of one shape memory alloy wire, the traction member can be locked in the traction member deformation maintenance slot, and under the action of another shape memory alloy wire, the traction member disengages from the traction member deformation maintenance slot.

[0012] Furthermore, the upper end of the traction component is provided with a through hole, and the plunger connector is provided with a screw, which is clearance-fitted with the through hole at the upper end of the traction component.

[0013] Furthermore, the traction component is a rectangular thin sheet with an upper rectangular hole and a lower rectangular hole. The two rectangular holes have the same width, the height of the upper rectangular hole is greater than the height of the lower rectangular hole, and the distance between the upper rectangular hole and the upper edge of the traction component is greater than the distance between the lower rectangular hole and the lower edge of the traction component.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The air valve of this invention adopts a micro-motion structure driven by dual shape memory alloy wires. By controlling the complementary traction of the two shape memory alloy wires, the air valve can be quickly opened and closed without waiting for the shape memory alloy wires to cool down, giving the air valve a high-frequency and fast response capability. When a closing command is sent to the air valve in the open state, because the traction component is stuck in the deformation maintenance slot of the traction component, the second shape memory alloy wire and the traction component, which passively deform, have stored a certain amount of elastic potential energy. At this time, the second shape memory alloy wire only needs to be briefly energized to complete the unlocking of the traction component, realizing the rapid unhooking of the traction component and the rapid reset of the plunger. Thus, the air valve closing action does not need to wait for the additional cooling time of the shape memory alloy wire, effectively ensuring the instantaneous response capability of the air valve. In addition, the air valve can lock the deformation position of the traction component through the slot, maintaining the air valve conduction state without continuously applying an electrical signal to the first shape memory alloy wire, effectively reducing energy consumption and achieving synergistic optimization of high dynamic response and low energy consumption of the air valve. Meanwhile, the airflow path inside the valve body is optimized by the surrounding layout of the flow guide channel, avoiding direct impact of airflow on the traction component, reducing the traction force of the shape memory alloy wire pulling the traction component, further reducing the energizing time of the shape memory alloy wire, and significantly improving the response speed and flow stability of the air valve.

[0015] 2. The air valve of this invention adopts a micro-aperture precision flow channel design, which enables high-precision control and stable output of small air volumes, significantly improving the control accuracy and stability of gas flow. Through the micro-aperture precision flow channel design, the airflow is guided to change direction in an orderly manner, dispersing airflow pressure and preventing direct impact of airflow on internal components. This significantly reduces turbulence and fluctuations in gas flow. Furthermore, the precision air channel layout enables directional transmission and state control of airflow, ensuring high-stability output of small air volumes. The precisely sized air valve outlet, air valve inlet, and their guiding channels further optimize airflow characteristics, enabling the air valve to achieve high-precision gas flow control and possess excellent anti-interference capabilities. Simultaneously, combined with the high-frequency fast response characteristics brought by the dual shape memory alloy wire drive structure, the air valve can achieve high-speed and precise opening and closing control within a wide flow and pressure range, realizing high-precision metering of the total output airflow. Therefore, it exhibits excellent flow control precision and anti-interference capabilities under various operating conditions.

[0016] 3. The gas valve of this invention employs an adaptive soft plunger based on flexible materials, combined with the high output force of shape memory alloy wire, significantly improving the high pressure resistance and sealing performance of the gas valve under high-pressure conditions. Under air pressure, the soft plunger can adaptively deform, fully conforming to the inner wall of the gas valve outlet, effectively increasing the sealing contact area, ensuring the sealing and stability of the air circuit connection, and working in conjunction with the gas outlet guide channels distributed circumferentially around the gas outlet to construct an orderly airflow guiding path, effectively overcoming the defects of traditional rigid valve plugs that are prone to leakage under high pressure due to damage such as small gaps, deformation, or cracks. This design, together with the pressure resistance characteristics of the valve body structure itself, jointly constructs a stable high-pressure sealing interface. Simultaneously, the continuous high tensile force provided by the shape memory alloy wire effectively resists the thrust of gas pressure on the plunger, ensuring that the gas valve can still achieve stable and rapid opening and closing actions under high-pressure environments, significantly enhancing the pressure-bearing capacity and sealing durability of the gas valve, and further extending its overall performance and service life under high-pressure conditions.

[0017] 4. This utility model's air valve utilizes lightweight materials and a minimalist drive structure design to achieve its function with very few parts, resulting in a simpler structure and significantly reduced overall weight. The core drive structure of this air valve is extremely simplified, consisting of only two SMA wires and a rigidity-programmed traction component, replacing traditional bulky components such as electromagnets and motors, achieving substantial weight reduction. Furthermore, by employing a rigidity-programmed traction component, precise stiffness distribution is achieved in terms of structural performance, effectively controlling deformation behavior under load, ensuring the stability of the transmission process, and preventing component misalignment or functional failure due to insufficient local stiffness. This also reduces material usage while ensuring stiffness performance, further reducing overall weight and meeting the system's lightweight requirements. Finally, by combining the state switching component with functional requirements and comprehensively considering strength, stiffness, and weight constraints, the overall weight is effectively reduced while ensuring air valve performance. By adopting a minimalist drive structure design, when it is necessary to control the opening and closing of the air valve, only the shape memory alloy wires need to be alternately energized. Under the drive of the traction component, the soft plunger will be displaced. Thus, only two shape memory alloy wires and one traction component are needed to complete the drive of the air valve opening and closing action. The air valve opening and closing control is achieved with a minimalist structure, reducing weight and effectively improving assembly convenience. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a cross-sectional view of the upper part of the valve body of this utility model; Figure 4 This is an exploded view of the state switching component of this utility model; Figure 5 This is a cross-sectional view of the present invention with the air valve closed. Figure 6 This is a cross-sectional view of the present invention with the air valve open. Reference numerals: 1. Valve body; 2. Shape memory alloy wire structure; 3. State switching component; 4. Lower air valve cover; 5. Upper air valve cover; 11. Inner cavity; 12. Air valve outlet; 13. Air valve inlet; 14. Air valve outlet guide channel; 15. Air valve inlet guide channel; 16. State switching component mounting groove; 17. First shape memory alloy wire mounting through hole; 18. Second shape memory alloy wire mounting through hole; 21. First shape memory alloy wire; 22. Second shape memory alloy wire; 23. First shape memory alloy wire mounting buckle; 24. Second shape memory alloy wire mounting buckle; 31. Mounting base; 32. Traction component; 33. Soft plunger; 34. Clamping component; 35. Plunger connector; 311. Traction component mounting slot; 312. Traction component deformation maintaining slot. Detailed Implementation

[0019] Specific embodiments are given below with reference to the accompanying drawings. These specific embodiments are only used to describe the technical solution of this utility model in detail, and are not intended to limit the scope of protection of this application.

[0020] This invention provides an ultra-lightweight air valve (hereinafter referred to as a miniature air valve, see appendix) based on a dual shape memory alloy wire driving structure. Figure 1-6 The miniature valve includes a valve body 1, a shape memory alloy wire structure 2, a state switching component 3, a lower valve cover 4, and an upper valve cover 5. The valve body 1 has an upper air valve cover 5 and a lower air valve cover 4 installed at its top and bottom, respectively. The state switching component 3 is installed inside the valve body 1. The shape memory alloy wire structure 2 is connected to the state switching component 3. The shape memory alloy wire structure 2 drives the state switching component 3 to move, thereby realizing the rapid opening and closing of the micro air valve.

[0021] The valve body 1 is a rectangular cylindrical structure. The upper part of the valve body 1 has symmetrical air valve outlet holes 12 and air valve inlet holes 13 on both sides. The middle part has symmetrical first shape memory alloy wire mounting through holes 17 and second shape memory alloy wire mounting through holes 18 on both sides. The lower part has a state switching component mounting groove 16. The air valve outlet 12 is a stepped through hole located on the upper left side of the valve body 1. Multiple air valve outlet guide channels 14 are distributed circumferentially around the air valve outlet 12. The angle between each air valve outlet guide channel 14 and the air valve outlet 12 is 30-60 degrees. One end of each air valve outlet guide channel 14 can communicate with the air valve outlet, and the other end can communicate with the inner cavity 11. The air valve inlet 13 is located on the upper right side of the valve body 1. Its outer end is connected to an external air pump, and its inner end is closed. Multiple air valve inlet guide channels 15 are distributed circumferentially around the inner end. The angle between each air valve inlet guide channel 15 and the air valve inlet 13 is 30-60 degrees. One end of each air valve inlet guide channel 15 communicates with the air valve inlet hole 13, and the other end communicates with the inner cavity 11. When the air valve is opened, air enters through the air inlet 13 via an external air pump, flows smoothly into the inner cavity 11 through the air inlet guide channel 15, and then converges through the air outlet guide channels 14 distributed around the air outlet 12 before being discharged from the air outlet 12. The valve body 1 is made of photosensitive resin, and the diameter of the air outlet guide channel 14 is 0.35~0.65mm, as is the diameter of the air inlet guide channel 15.

[0022] The state switching component 3 includes a mounting base 31, a traction member 32, a flexible plunger 33, a clamping member 34, and a plunger connector 35. The mounting base 31 has a rectangular flat structure. A rectangular flat boss is located on one side of the upper and lower parts of the mounting base 31. The upper rectangular flat boss has a traction member deformation-maintaining groove 312, and the lower rectangular flat boss has a traction member mounting groove 311. A T-shaped flat boss is located on the other side of the lower part of the mounting base 31. This T-shaped flat boss is inserted into the state switching component mounting groove 16 of the valve body 1 with an interference fit, thus connecting the mounting base 31 and the valve body 1. The lower end of the traction member 32 is engaged in the traction member mounting slot 311 on the mounting base 31, and the middle part can be engaged in the traction member deformation maintaining slot 312 on the mounting base 31. The upper end of the traction member 32 is connected to one end of the plunger connector 35. The other end of the plunger connector 35 is provided with a boss, which is connected to the soft plunger 33 by an interference fit. The soft plunger 33 is installed at one end of the air valve outlet 12 near the inner cavity 11 of the valve body 1, and the soft plunger 33 can move slightly along the axial direction of the air valve outlet 12 to realize the opening and closing of the air valve outlet guide channel 14. The clamping member 34 is fixed in the middle of the traction member 32 and consists of two buckles for installing the shape memory alloy wire.

[0023] The traction component 32, as a key transmission component of the state switching assembly 3, oscillates under the pull of the shape memory alloy wire. During the oscillation, the plunger connector 35 located at its upper end will experience a parasitic displacement in the vertical direction. To compensate for this parasitic displacement and ensure that the soft plunger 33 moves smoothly along a preset trajectory within the air valve outlet 12 without jamming, the connection between the plunger connector 35 and the traction component 32 adopts a clearance fit design with radial floating capability. Specifically, the upper end of the traction plate 32 is provided with a through hole, and the plunger connector 35 is provided with a screw. The screw is clearance-fitted with the through hole at the upper end of the traction plate 32, which constrains the lateral (i.e., axial) displacement of the plunger connector 35, while retaining the vertical (i.e., radial) movement margin of the plunger connector 35. When the traction member 32 swings, the plunger connector 35 can generate a slight adaptive displacement in the vertical direction, thereby offsetting the positional deviation caused by the swing of the traction member 32 in real time, so that the soft plunger 33 always maintains axial alignment, ensuring that the soft plunger 33 can move smoothly within the air outlet 12 of the air valve. This floating connection method effectively isolates the motion interference caused by offset with a simple and reliable mechanical structure without introducing additional compensation components. It is one of the key designs for achieving high-precision micro-motion and long-life sealing of the air valve.

[0024] To further compensate for the radial offset generated during the movement of the soft plunger 33, the traction component 32 adopts a variable stiffness design with "lower stiffness at the lower end and higher stiffness at the upper end." Simulation determined that the traction component 32 is a rectangular sheet with a rectangular hole at both the upper and lower parts. The two rectangular holes have the same width, the height of the upper rectangular hole is greater than the height of the lower rectangular hole, and the distance between the upper rectangular hole and the upper edge of the rectangular sheet is greater than the distance between the lower rectangular hole and the lower edge of the rectangular sheet, thus achieving variable stiffness of the traction component 32. In this embodiment, the overall dimensions of the traction component 32 are 15.75 × 4.13 × 0.12 mm. The dimensions of the upper rectangular hole are 2.60 × 6.25 mm, and the distance between the center of the hole and the upper edge of the traction component 32 is 2.21 mm; the dimensions of the lower rectangular hole are 2.60 × 4.72 mm, and the distance between the center of the hole and the lower edge of the traction component 32 is 0.70 mm.

[0025] The shape memory alloy wire structure 2 includes a first shape memory alloy wire 21, a second shape memory alloy wire 22, a first shape memory alloy wire mounting clip 23, and a second shape memory alloy wire mounting clip 24. One end of the first shape memory alloy wire 21 is fixedly connected to one side of the clamping member 34, and the other end passes through the first shape memory alloy wire mounting through hole 17 and the first shape memory alloy wire mounting clip 23 located at the port of the first shape memory alloy wire mounting through hole 17, and is connected to the power supply circuit. One end of the second shape memory alloy wire 22 is fixedly connected to the other side of the clamping member 34, and the other end passes through the second shape memory alloy wire mounting through hole 18 and the second shape memory alloy wire mounting clip 24 located at the port of the second shape memory alloy wire mounting through hole 18, and is connected to the power supply circuit. The power supply circuit controls the on / off state of the two shape memory alloy wires. The first shape memory alloy wire 21 is used to control the opening of the air valve, and the second shape memory alloy wire 22 is used to control the closing of the air valve. When the first shape memory alloy wire 21 is energized and contracts, the traction member 32 swings in the contraction direction of the first shape memory alloy wire 21, causing the soft plunger 33 to move slightly towards the inner cavity 11 of the valve body 1, thus opening the air valve outlet guide channel 14 and opening the air valve. At this time, the traction member 32 is stuck in the deformation maintenance slot 312, and the air valve can be maintained in the open state without continuous heating of the first shape memory alloy wire 21. When the second shape memory alloy wire 22 is energized and contracts, the traction member 32 swings in the contraction direction of the second shape memory alloy wire 22, causing the traction member 32 to be immediately pulled out of the deformation maintenance slot 312 without waiting for cooling time, which can effectively improve the response rate.

[0026] The working principle and workflow of this utility model are as follows: In the initial normally closed state, the air valve tightly seals the air outlet 12 and the air outlet guide channel 14 of the air valve through the soft plunger 33 under air pressure. The soft plunger 33 is an adaptive sealing structure based on flexible material, which can generate adaptive deformation under high pressure, further enhancing the sealing interface fit. At the same time, it is combined with the valve body 1, which is made of flexible material, and has good pressure resistance, so that the air valve has excellent high pressure sealing performance.

[0027] When the air valve needs to be opened, the first shape memory alloy wire 21 is briefly energized and heated, causing its temperature to rise and its length to shorten rapidly. This pulls the traction member 32 to swing towards the air valve inlet 13, driving the soft plunger 33 to move closer to the valve body cavity. This opens the air valve outlet guide channel 14, connecting the air valve outlet 12 with the valve body cavity 11, thus opening the air valve and achieving a rapid response. After the air valve is opened, thanks to the micro-aperture precision air valve outlet guide channel 14 design, the airflow in the valve body cavity 11 converges through the air valve outlet guide channel 14 and is output to the outside from the air valve outlet 12, achieving stable gas output. At the same time, when the first shape memory alloy wire 21 undergoes a brief deformation, after the traction member 32 swings, it will be locked in the deformation maintenance slot 312 of the traction member. The first shape memory alloy wire 21 maintains its current shape without continuous energization and heating, and the traction member 32 will not reset, effectively reducing energy consumption.

[0028] When the air valve needs to be closed, the second shape memory alloy wire 22 is briefly energized and heated, causing it to deform and contract. Since the state switching component 3 adopts an energy storage design, when the traction member 32 is inserted into the traction member deformation maintenance slot 312, a certain amount of elastic potential energy has been accumulated due to the deformation of the traction member 32 and the stretching of the second shape memory alloy wire 22. Therefore, the second shape memory alloy wire 22 only needs to be briefly energized, without waiting for additional cooling time, to immediately pull the traction member 32 out of the traction member deformation maintenance slot 312, so that the state switching component 3 is reset. At the same time, the air valve outlet guide channel 14 is sealed by the soft plunger 33, so that the inner cavity 11 of the valve body 1 cannot communicate with the air valve outlet 12 through the air valve outlet guide channel 14, thereby realizing the rapid closure of the air valve.

[0029] This valve achieves rapid opening and closing with a minimalist drive structure centered on two shape memory alloy wires and a traction component. This significantly reduces overall weight and simplifies the assembly process, making it more efficient. During valve closure, the high tensile force provided by the shape memory alloy wires effectively overcomes the thrust of high-pressure gas on the soft plunger 33, ensuring stable and reliable opening and closing even under high-pressure conditions. Combined with the high pressure resistance of the valve body 1 made of flexible material, this further enhances the valve's high-pressure resistance and reliability. The valve's closing response is rapid, achieving millisecond-level closure. Combined with the flow stabilization characteristics of the micro-aperture valve outlet guide channel 14, the airflow output remains highly stable per unit time, significantly improving the overall control accuracy of gas flow. Since the micro valve does not require waiting for the alloy wires to cool during opening and closing, it can perform high-frequency, repetitive, and rapid opening and closing cycles depending on the on-site conditions, greatly expanding its application potential in precision applications requiring rapid airflow modulation.

[0030] Any aspects not covered in this utility model are applicable to the prior art.

Claims

1. An ultra-lightweight air valve based on a dual-shape memory alloy wire drive structure, characterized in that, It includes a valve body, a shape memory alloy wire structure, a state switching component, a lower air valve cover, and an upper air valve cover; the upper air valve cover and the lower air valve cover are located at the top and bottom of the valve body, and the upper part of the valve body is symmetrically provided with an air valve outlet and an air valve inlet on both sides. The state switching component includes a mounting base, a traction component, a soft plunger, and a plunger connector. The mounting base is fixed to the lower part of the valve body cavity. The traction component is located in the valve body cavity and its lower end is connected to the lower part of the mounting base. The upper end of the traction component is connected to the soft plunger through the plunger connector. The soft plunger is embedded in the end of the air valve outlet near the valve body cavity and can reciprocate slightly along the axial direction of the air valve outlet. The shape memory alloy wire structure includes two shape memory alloy wires; the two shape memory alloy wires are distributed on both sides of the valve body, with one end connected to the middle of the traction component and the other end connected to the mounting buckle located on the side wall of the valve body.

2. The ultra-lightweight air valve based on a dual shape memory alloy wire drive structure according to claim 1, characterized in that, The air valve outlet has multiple air valve outlet guide channels distributed circumferentially. One end of each air valve outlet guide channel can communicate with the air valve outlet and the other end can communicate with the valve body cavity. The air valve inlet has multiple air valve inlet guide channels distributed circumferentially at the inner end. One end of each air valve inlet guide channel can communicate with the air valve inlet and the other end can communicate with the valve body cavity.

3. The ultra-lightweight air valve based on a dual shape memory alloy wire drive structure according to claim 2, characterized in that, The angle between the air valve outlet guide channel and the air valve outlet is 30~60°, and the diameter of the air valve outlet guide channel is 0.35~0.65mm.

4. The ultra-lightweight air valve based on a dual shape memory alloy wire drive structure according to claim 2 or 3, characterized in that, The angle between the air valve inlet guide channel and the air valve inlet is 30~60°, and the diameter of the air valve inlet guide channel is 0.35~0.65mm.

5. The ultra-lightweight air valve based on a dual shape memory alloy wire drive structure according to claim 1, characterized in that, The upper part of the mounting base is provided with a traction component deformation maintenance slot. Under the action of one shape memory alloy wire, the traction component can be locked in the traction component deformation maintenance slot, and under the action of another shape memory alloy wire, the traction component disengages from the traction component deformation maintenance slot.

6. The ultra-lightweight air valve based on a dual shape memory alloy wire drive structure according to claim 1, characterized in that, The upper end of the traction component is provided with a through hole, and the plunger connector is provided with a screw, which is clearance-fitted with the through hole at the upper end of the traction component.

7. The ultra-lightweight air valve based on a dual shape memory alloy wire drive structure according to claim 1, characterized in that, The traction component is a rectangular thin sheet with an upper rectangular hole and a lower rectangular hole. The two rectangular holes have the same width, the height of the upper rectangular hole is greater than the height of the lower rectangular hole, and the distance between the upper rectangular hole and the upper edge of the traction component is greater than the distance between the lower rectangular hole and the lower edge of the traction component.

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