Pressure retaining air valve

Abstract

The utility model relates to control air valve technical field discloses a kind of pressure-maintaining air valves, the outer wall of air passage shell is provided with air inlet, gas outlet and exhaust port, first shape memory component can selectively block first flow-through port, when first shape memory component does not block first flow-through port, gas is by air inlet and is passed into first air passage, first air passage is communicated with first gas cavity, via second flow-through port and is transferred into second air passage, and from gas outlet, complete the inflation function of pressure-maintaining air valve;When first shape memory component blocks first flow-through port, complete pressure-maintaining function;Second shape memory component can selectively block third flow-through port, when second shape memory component does not block third flow-through port, gas flows out second air passage from third flow-through port, and is transferred into second gas cavity, and via exhaust hole is communicated with outside, complete the deflation function of pressure-maintaining air valve.The pressure-maintaining air valve simple structure can control inflation, deflation and pressure-maintaining three kinds of function respectively.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, and in particular to a pressure-holding valve. Background Technology

[0002] A gas valve is an automatic valve component that controls the entry and exit of gas from a cylinder. The performance of a gas valve directly affects the compressor's exhaust efficiency, energy consumption, and operational stability, and is one of the key factors limiting the compressor's speed.

[0003] Shape memory alloys (SMAs) are materials composed of two or more metallic elements that exhibit shape memory effect (SME) through thermoelastic and martensitic phase transformations and their inverse transformations. SMAs possess the best shape memory performance among shape memory materials, and their shape memory effect is widely used in various temperature sensor triggers. Another important property of SMAs is pseudoelasticity, also known as superelasticity. This manifests as a significantly greater deformation recovery capacity under external forces compared to ordinary metals, allowing them to withstand much larger deformations without failure.

[0004] To replace electric motors with shape memory alloys for controlling air valves, achieving advantages such as low power consumption, no noise, reduced space, and a 50% weight reduction, and enabling effective mass production to replace traditional motors, a pressure-holding air valve is urgently needed. This valve can independently control the inflation, deflation, and pressure-holding functions. Utility Model Content

[0005] The purpose of this utility model is to provide a pressure-holding valve with a simple structure that allows for convenient control of the three functions of inflation, deflation, and pressure holding.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Pressure holding valve, including:

[0008] The control module includes a first shape memory component and a second shape memory component;

[0009] An airway housing has an inner cavity comprising a first airway, a second airway, a first air chamber, and a second air chamber. The outer wall of the airway housing has an air inlet, an air outlet, and an exhaust outlet. The air inlet communicates with the first airway; the air outlet communicates with the second airway; and the exhaust outlet communicates with the second air chamber.

[0010] The first airway has a first flow port for connecting the first airway and the first air chamber; the second airway has a second flow port for connecting the first air chamber and the second airway; the second airway has a third flow port for connecting the second airway and the second air chamber.

[0011] The first shape memory component selectively blocks the first flow port; the second shape memory component selectively blocks the third flow port.

[0012] As an optional technical solution for the pressure-holding air valve, the pressure-holding air valve includes multiple control modules, and the air passage housing is provided with multiple air outlets, each air outlet corresponding to one of the control modules; the first air passage is provided with multiple first flow ports, and the second air passage, the first air chamber, and the second air chamber are each corresponding to one of the first flow ports.

[0013] As an optional technical solution for the pressure-holding air valve, the first air passage and the second air passage are arranged in a funnel shape that interlocks with each other.

[0014] As an optional technical solution for the pressure-holding valve, the end of the first movable member near the first flow port is made of a flexible material, and when the first movable member blocks the first flow port, the first flow port and the first movable member are in an interference fit; and / or, the end of the second movable member near the third flow port is made of a flexible material, and when the second movable member blocks the third flow port, the third flow port and the second movable member are in an interference fit.

[0015] As an optional technical solution for the pressure-holding air valve, the first shape memory component includes a first shape memory metal wire and a first movable member. The first shape memory metal wire is configured as a U-shaped metal wire, with the opening direction of the U-shaped metal wire away from the first flow port. The middle part of the U-shaped metal wire is used to hook the first movable member to move along the opening direction of the U-shaped metal wire. Both ends of the U-shaped metal wire can extend out of the air passage housing and be energized. The first movable member is used to block the first flow port. And / or, the second shape memory component includes a second shape memory metal wire and a second movable member. The second shape memory metal wire is configured as a U-shaped metal wire, with the opening direction of the U-shaped metal wire away from the third flow port. The middle part of the U-shaped metal wire is used to hook the second movable member to move along the opening direction of the U-shaped metal wire. Both ends of the U-shaped metal wire can extend out of the air passage housing and be energized. The second movable member (250) is used to block the first flow port (115).

[0016] As an optional technical solution for the pressure-holding valve, the end of the first shape memory metal wire is wrapped with a conductive sheet, which is used to connect to a power source; and / or, the end of the second shape memory metal wire is wrapped with a conductive sheet, which is used to connect to a power source.

[0017] As an optional technical solution for the pressure-holding valve, the opening area of ​​the exhaust port is larger than that of the outlet port.

[0018] As an optional technical solution for the pressure-holding air valve, the control module further includes an elastic element, one end of which is fixed inside the first air chamber, and the other end of which is connected to the first movable element; and / or, the control module further includes an elastic element, one end of which is fixed inside the second air chamber, and the other end of which is connected to the second movable element.

[0019] As an optional technical solution for the pressure-holding air valve, the air passage housing includes an air passage component and an air cavity component. The air passage component is provided with a first air passage and a second air passage. The air cavity component is engaged with the air passage component to form the first air cavity and the second air cavity.

[0020] As an optional technical solution for the pressure-holding air valve, one of the air chamber component and the air passage component is provided with an alignment protrusion, and the other is provided with an alignment hole, wherein the alignment protrusion is snapped into the alignment hole.

[0021] The beneficial effects of this utility model are:

[0022] The pressure-holding air valve provided by this utility model includes a control module and an air passage housing. The control module includes a first shape memory component and a second shape memory component. The inner cavity of the air passage housing is provided with a first air passage, a second air passage, a first air chamber, and a second air chamber. The outer wall of the air passage housing is provided with an air inlet, an air outlet, and an air exhaust port. The air inlet is connected to one end of the first air passage, and the other end of the first air passage is provided with a first flow port for connecting the first air passage and the first air chamber. The air outlet is connected to one end of the second air passage, and the other end of the second air passage is provided with a second flow port for connecting the first air chamber and the second air passage. The second air passage is also provided with a third flow port for connecting the second air passage and the second air chamber. The air exhaust port is used to connect the second air chamber to the outside. The first shape memory component can selectively block the first flow port. When the first shape memory component does not block the first flow port, the first air passage is connected to the first air chamber and then to the second air passage via the second flow port, completing the inflation function of the pressure-holding valve. When the first shape memory component blocks the first flow port, it completes the pressure-holding function. The second shape memory component can selectively block the third flow port. When the second shape memory component does not block the third flow port, the second air passage is connected to the second air chamber and then to the outside via the exhaust port, completing the deflation function of the pressure-holding valve. This pressure-holding valve has a simple structure and can control the inflation, deflation, and pressure-holding functions separately. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the pressure-holding air valve provided in a specific embodiment of this utility model;

[0024] Figure 2 This is a front view of the pressure-holding air valve provided in a specific embodiment of this utility model;

[0025] Figure 3 This is a rear view of the air passage and control module of the pressure-holding air valve in its initial state or when it is holding pressure, according to a specific embodiment of this utility model.

[0026] Figure 4 This is a rear view of the air passage and control module of the pressure-holding air valve during inflation, provided in a specific embodiment of this utility model.

[0027] Figure 5 This is a rear view of the air passage and control module of the pressure-holding air valve during exhaust according to a specific embodiment of this utility model.

[0028] Figure 6 This is a rear view of the air passage component of the pressure-holding air valve provided in a specific embodiment of this utility model;

[0029] Figure 7 yes Figure 6 Enlarged view of section A;

[0030] Figure 8yes Figure 7 A sectional view.

[0031] In the picture:

[0032] 100. Airway shell; 101. First airway; 102. Second airway; 103. First air chamber; 104. Second air chamber;

[0033] 110. Air passage component; 111. Air inlet; 112. First flow port; 113. Second flow port; 114. Air outlet; 115. Third flow port; 116. Alignment protrusion;

[0034] 120. Air chamber component; 121. Exhaust port; 122. Alignment hole;

[0035] 200, Control module; 210, First shape memory metal wire; 220, Second shape memory metal wire; 230, Conductive sheet; 240, First movable component; 250, Second movable component; 260, Elastic component. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] like Figures 1 to 8 As shown, this utility model discloses a pressure-holding air valve, including a control module 200 and an air passage housing 100. The control module 200 includes a first shape memory component and a second shape memory component. The inner cavity of the air passage housing 100 is provided with a first air passage 101, a second air passage 102, a first air chamber 103, and a second air chamber 104. The outer wall of the air passage housing 100 is provided with an air inlet 111, an air outlet 114, and an exhaust port 121. The air inlet 111 is connected to one end of the first air passage 101, and the other end of the first air passage 101 is provided with an air outlet 114. The first flow port 112 is used to connect the first air passage 101 and the first air chamber 103; the air outlet 114 is connected to one end of the second air passage 102, and the other end of the second air passage 102 is provided with a second flow port 113, which is used to connect the first air chamber 103 and the second air passage 102; the second air passage 102 is also provided with a third flow port 115, which is used to connect the second air passage 102 and the second air chamber 104; the exhaust port 121 is used to connect the second air chamber 104 to the outside.

[0041] The first shape memory component includes a first shape memory metal wire 210 and a first movable member 240, which can selectively block the first flow port 112; the second shape memory component includes a second shape memory metal wire 220 and a second movable member 250, which can selectively block the third flow port 115. The first movable member 240 is located in the first air chamber 103. The first movable member 240 selectively blocks the first flow port 112. The first shape memory metal wire 210 is connected to the first movable member 240. The first shape memory metal wire 210 can be energized and deformed to move the first movable member 240 away from the first flow port 112. At this time, the first shape memory component does not block the first flow port, the first air passage is connected to the first air chamber, and is connected to the second air passage through the second flow port. The second movable component 250 is located inside the second air chamber 104. The second movable component 250 selectively blocks the third flow port 115. The second shape memory metal wire 220 is connected to the second movable component 250. The second shape memory metal wire 220 can be energized and deformed to move the second movable component 250 away from the third flow port 115. At this time, the second shape memory component does not block the third flow port. The second air passage is connected to the second air chamber and is connected to the outside through the exhaust port.

[0042] Specifically, gas enters through the inlet 111, and the pressure-holding valve is initially closed, with the first movable element 240 blocking the first flow port 112. Then, the first shape memory metal wire 210 is energized, causing the first movable element 240 to move downwards away from the first flow port 112, exposing the first flow port 112. At this point, the first air passage 101 opens, and gas flows from the first air passage 101 through the first air chamber 103 into the second air passage 102. The gas flows sequentially through the first flow port 112 and the second flow port 113, and exits from the outlet 114, completing the inflation function. Then, the first shape memory metal wire 210 is de-energized and returns to its initial state, and the first movable element 240 re-blocks the first flow port 112, sealing the first air passage 101. Only a portion of the gas can remain between the second air passage 102 and the first air chamber 103, completing the pressure-holding function. Finally, the second shape memory metal wire 220 is energized, causing the second movable part 250 to move downward away from the third flow port 115, exposing the third flow port 115. At this time, the second air passage 102 opens, and the gas flows back into the second air passage 102 from the air outlet 114, flows out through the third flow port 115, and is transferred to the second air chamber 104. Finally, it flows to the outside through the exhaust port 121, completing the venting function. This pressure-holding valve has a simple structure, and by controlling only two metal wires, it can control the three functions of inflation, deflation, and pressure holding respectively.

[0043] In this embodiment, the control module 200 further includes an elastic element 260, which can be respectively disposed in the first air cavity 103 and the second air cavity 104. One end of one elastic element 260 is fixed inside the first air cavity 103, and the other end of the elastic element 260 is connected to the first movable element 240; one end of the other elastic element 260 is fixed inside the second air cavity 104, and the other end of the elastic element 260 is connected to the second movable element 250. The purpose of providing the elastic element 260 is to enable the first shape memory metal wire 210 and the second shape memory metal wire 220 to be reset after power failure.

[0044] Furthermore, the end of the first movable member 240 near the first flow port 112 is made of a flexible material. When the first movable member 240 blocks the first flow port 112, the first flow port 112 and the first movable member 240 are press-fitted together, and the first flow port 112 can be completely embedded in the flexible end of the first movable member 240. The flexible end of the first movable member 240 deforms to compress and seal the first flow port 112. Similarly, the end of the second movable member 250 near the third flow port 115 is made of a flexible material. When the second movable member 250 blocks the third flow port 115, the third flow port 115 and the second movable member 250 are press-fitted together. The purpose of the above arrangement is to ensure the sealing performance of the first movable member 240 and the second movable member 250 when they block the first air passage 101 and the second air passage 102, respectively.

[0045] In this embodiment, the pressure-holding valve includes multiple control modules 200. The air passage housing 100 is provided with multiple air outlets 114, and each air outlet 114 is configured to correspond one-to-one with a control module 200. The first air passage 101 is provided with multiple first flow ports 112, and the first air passage 101 corresponds to multiple second air passages 102, that is, to multiple air outlets 114. The second air passages 102, the first air chambers 103, and the second air chambers 104 are configured one-to-one with the first flow ports 112. For example, there are ten control modules 200, so the pressure-holding valve has a ten-connection structure, that is, air enters through one air inlet 111, and ten positions that need to be inflated can be controlled separately on one pressure-holding valve.

[0046] To save on the design volume of the pressure-holding valve, the first air passage 101 and the second air passage 102 are arranged in two interlocking funnel shapes, which can ensure smooth and unobstructed gas flow, shorten the gas flow path as much as possible, and improve the working efficiency and appearance of the pressure-holding valve.

[0047] Specifically, the first shape memory metal wire 210 is configured as a U-shaped metal wire, with its opening direction away from the first flow port 112. The middle part of the U-shaped metal wire is used to hook the first movable member 240 to move along the opening direction of the U-shaped metal wire. Both ends of the U-shaped metal wire can extend out of the air passage housing 100 and be energized. Similarly, the second shape memory metal wire 220 can also be configured as a U-shaped metal wire, with its opening direction away from the third flow port 115. The middle part of the U-shaped metal wire is used to hook the second movable member 250 to move along the opening direction of the U-shaped metal wire. Both ends of the U-shaped metal wire can extend out of the air passage housing 100 and be connected to the power supply. The U-shaped metal wire can stably control the first movable member 240 and the second movable member 250, and both ends of the U-shaped metal wire can be energized simultaneously, making full use of the shape memory effect of its material, further accelerating the control process of the pressure-holding air valve.

[0048] Optionally, the end of the first shape memory metal wire 210 is wrapped with a conductive sheet 230, and correspondingly, the end of the second shape memory metal wire 220 is also wrapped with a conductive sheet 230. The conductive sheet 230 is used for connection with the power supply. The connection position of the ends of the first shape memory metal wire 210 and the second shape memory metal wire 220 can be increased respectively to ensure the stability of the power connection. An insulating layer can also be added outside the conductive sheet 230.

[0049] Furthermore, the opening area of ​​the exhaust port 121 is larger than that of the outlet port 114 and the inlet port 111. Therefore, it is not necessary to deliberately control the gas flow during depressurization, which can achieve rapid depressurization and speed up the working process of the pressure holding valve.

[0050] In this embodiment, the airway housing 100 includes an airway component 110 and an air cavity component 120. The airway component 110 is provided with a first airway 101 and a second airway 102. The air cavity component 120 is engaged with the airway component 110 to form a first air cavity 103 and a second air cavity 104. The airway component 110 has a mounting groove surrounding the first air cavity 103 and the second air cavity 104. The air cavity component 120 has a mounting step, which can be sealed within the mounting groove to align and connect the airway component 110 and the air cavity component 120, ensuring that the first air cavity 103 and the second air cavity 104 remain airtight.

[0051] For example, one of the air chamber component 120 and the air passage component 110 is provided with an alignment protrusion 116, and the other is provided with an alignment hole 122. The alignment protrusion 116 is snapped into the alignment hole 122, which can further improve the assembly accuracy and stability of the air passage component 110 and the air chamber component 120. Threaded parts can also be used to connect the air passage component 110 and the air chamber component 120 for easy disassembly and installation.

[0052] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pressure-holding air valve, characterized in that, include: The control module (200) includes a first shape memory component and a second shape memory component; An airway housing (100) has an inner cavity provided with a first airway (101), a second airway (102), a first air chamber (103), and a second air chamber (104). The outer wall of the airway housing (100) is provided with an air inlet (111), an air outlet (114), and an exhaust outlet (121). The air inlet (111) is connected to the first airway (101); the air outlet (114) is connected to the second airway (102); and the exhaust outlet (121) is connected to the second air chamber (104). The first airway (101) has a first flow port (112) for connecting the first airway (101) and the first air chamber (103); the second airway (102) has a second flow port (113) for connecting the first air chamber (103) and the second airway (102); the second airway (102) has a third flow port (115) for connecting the second airway (102) and the second air chamber (104). The first shape memory component selectively blocks the first flow port (112); the second shape memory component selectively blocks the third flow port (115).

2. The pressure-holding air valve according to claim 1, characterized in that, The pressure-holding valve includes multiple control modules (200), and the air passage housing (100) is provided with multiple air outlets (114), each air outlet (114) corresponding to a control module (200); the first air passage (101) is provided with multiple first flow ports (112), and the second air passage (102), the first air chamber (103), and the second air chamber (104) are each corresponding to a first flow port (112).

3. The pressure-holding air valve according to claim 1, characterized in that, The first air passage (101) and the second air passage (102) are arranged in two interlocking bucket shapes.

4. The pressure-holding air valve according to claim 1, characterized in that, The end of the first movable part (240) near the first flow port (112) is made of flexible material. When the first movable part (240) blocks the first flow port (112), the first flow port (112) and the first movable part (240) are in an interference fit. And / or, the end of the second movable member (250) near the third flow port (115) is made of a flexible material, and when the second movable member (250) blocks the third flow port (115), the third flow port (115) and the second movable member (250) are interference fit.

5. The pressure-holding air valve according to claim 1, characterized in that, The first shape memory component includes a first shape memory metal wire (210) and a first movable member (240). The first shape memory metal wire (210) is configured as a U-shaped metal wire. The opening direction of the U-shaped metal wire is away from the first flow port (112). The middle part of the U-shaped metal wire is used to hook the first movable member (240) to move along the opening direction of the U-shaped metal wire. Both ends of the U-shaped metal wire can extend out of the airway housing (100) and be energized. The first movable member (240) is used to block the first flow port (112). And / or, the second shape memory component includes a second shape memory metal wire (220) and a second movable member (250). The second shape memory metal wire (220) is configured as a U-shaped metal wire, with the opening direction of the U-shaped metal wire away from the third flow port (115). The middle part of the U-shaped metal wire is used to hook the second movable member (250) to move along the opening direction of the U-shaped metal wire. Both ends of the U-shaped metal wire can extend out of the airway housing (100) and be energized. The second movable member (250) is used to block the third flow port (115).

6. The pressure-holding air valve according to claim 5, characterized in that, The end of the first shape memory metal wire (210) is wrapped with a conductive sheet (230), which is used to connect to a power source; And / or, the end of the second shape memory wire (220) is wrapped with a conductive sheet (230) for connection to a power source.

7. The pressure-holding air valve according to claim 1, characterized in that, The opening area of ​​the exhaust port (121) is larger than that of the air outlet (114).

8. The pressure-holding air valve according to claim 1, characterized in that, The control module (200) further includes an elastic element (260), one end of which is fixed inside the first air chamber (103), and the other end of which is connected to the first movable element (240). And / or, the control module (200) further includes an elastic element (260), one end of which is fixed inside the second air chamber (104), and the other end of which is connected to the second movable element (250).

9. The pressure-holding air valve according to any one of claims 1-8, characterized in that, The airway housing (100) includes an airway component (110) and an air cavity component (120). The airway component (110) is provided with a first airway (101) and a second airway (102). The air cavity component (120) is engaged with the airway component (110) to form a first air cavity (103) and a second air cavity (104).

10. The pressure-holding air valve according to claim 9, characterized in that, One of the air chamber component (120) and the air passage component (110) is provided with an alignment protrusion (116), and the other is provided with an alignment hole (122). The alignment protrusion (116) is snapped into the alignment hole (122).

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