Inflatable valve, accumulator and hydro-pneumatic suspension cylinder

Abstract

The utility model provides a kind of inflating valve, energy accumulator and oil gas suspension cylinder, it is related to high-pressure gas sealing technical field, inflating valve includes: valve body, with installation cavity;Locking part, rotatably be located in installation cavity, can be moved along first direction;Valve stem, be located in installation cavity, with locking part screw connection;When locking part rotates, valve stem can be moved along first direction;Reset elastic member, be located in installation cavity, cover set in valve stem, two ends are respectively with locking part and the cavity wall of installation cavity abut;Installation cavity has conical sealing surface, valve stem has arc sealing surface, annular sealing element is equipped on arc sealing surface;In the process that locking part rotates relative to valve body, arc sealing surface is away from or close to conical sealing surface, to realize the opening and sealing of inflating valve.The utility model's technical scheme, under sealing condition, annular sealing element is extruded and deformed and fills gap, to realize surface contact, it is favorable to promote sealing effect, and higher reliability.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure gas sealing technology, specifically to an air charging valve, an accumulator, and an oil-gas suspension cylinder. Background Technology

[0002] An inflation valve is a high-pressure gas sealing and on / off control device used in sealed containers. Its core function is to realize the injection, sealing and release of gas, and to ensure airtightness under high-pressure environments.

[0003] In the related technology of air-filling valves, the valve body and valve stem are sealed by line contact, which results in poor sealing performance and low reliability. Utility Model Content

[0004] In order to solve or improve the technical problems of poor sealing performance and low reliability of the sealing method using line contact, one objective of this utility model is to provide an inflation valve.

[0005] Another objective of this invention is to provide an energy storage device.

[0006] Another objective of this invention is to provide an oil-gas suspension cylinder.

[0007] To achieve the above objectives, the first aspect of this utility model provides an inflation valve, comprising: a valve body having an installation cavity; a locking member rotatably disposed within the installation cavity and capable of moving relative to the valve body in a first direction; a valve stem disposed within the installation cavity and threadedly connected to the locking member; during the rotation of the locking member relative to the valve body, the valve stem is capable of moving relative to the valve body in the first direction; a reset elastic member disposed within the installation cavity, sleeved on the valve stem, one end of the reset elastic member abutting against the locking member, and the other end of the reset elastic member abutting against the cavity wall of the installation cavity; wherein, the installation cavity has a conical sealing surface, the valve stem has an arc-shaped sealing surface, and an annular sealing member is provided on the arc-shaped sealing surface; during the rotation of the locking member relative to the valve body, the arc-shaped sealing surface moves away from or closer to the conical sealing surface, thereby realizing the opening and sealing of the inflation valve.

[0008] This invention aims to provide an inflation valve. When the locking member is rotated in a first rotation direction, the arc-shaped sealing surface gradually approaches the conical sealing surface. The annular seal between the two sealing surfaces is compressed and deformed, filling the gap between the sealing surfaces to achieve surface contact between the valve body and the valve stem. When the locking member is rotated in a second rotation direction, the arc-shaped sealing surface gradually moves away from the conical sealing surface to release the seal, allowing the valve to enter either an intake or exhaust state according to actual requirements. In the sealed state, the valve body and valve stem achieve surface contact through the annular seal. This design significantly improves the sealing effect and increases reliability.

[0009] It is important to emphasize that the two sealing surfaces adopt a conical sealing surface and an arc-shaped sealing surface respectively. When the two seals approach each other, the two sealing surfaces do not directly contact each other, but rather achieve surface contact through the seals. This design method results in better sealing effect and higher reliability.

[0010] In some technical solutions, optionally, the mounting cavity includes a first cavity segment, a second cavity segment, and a third cavity segment that are connected; the connecting wall between the first cavity segment and the second cavity segment is a first stepped surface; the connecting wall between the third cavity segment and the second cavity segment is a conical sealing surface; at least a portion of the locking member is disposed in the first cavity segment, and the first stepped surface is used to limit the range of movement of the locking member in a first direction; the second cavity segment is provided with a supporting stepped surface, and the end of the reset elastic member away from the locking member is used to abut against the supporting stepped surface.

[0011] In this technical solution, when the inflation valve needs to enter the locked state (i.e., the sealed state), the locking member is rotated in the first rotation direction. When the locking member touches the first step surface, continuing to rotate the locking member will cause the valve stem to move continuously along the axial direction until the main sealing structure of the valve body is tightly fitted with the conical sealing surface to ensure the reliability of the sealing state.

[0012] By setting a support step surface, the support stability of the reset elastic element is improved. The reset elastic element provides elastic force to the locking element and valve stem in the connected state (threaded connection), so that the arc-shaped sealing surface always tends to move closer to the conical sealing surface, thereby ensuring the sealing state of the inflation valve under low pressure.

[0013] In some technical solutions, optionally, at least a portion of the locking element is located within the second cavity; the valve stem is located within both the second and third cavities; and the locking element is sleeved on the valve stem to achieve a threaded connection.

[0014] In this technical solution, by precisely setting the positions of the locking element and the valve stem within the mounting cavity, it is ensured that when the locking element rotates relative to the valve body, the valve stem can move relative to the valve body in the first direction, so that the arc-shaped sealing surface moves away from or closer to the conical sealing surface, thereby realizing the opening and sealing of the inflation valve.

[0015] In some technical solutions, the inflation valve may optionally include: a first limiting member, which is engaged in the first cavity, the first limiting member being used to limit the range of movement of the locking member in the first direction; at least a portion of the locking member is disposed between the first limiting member and the first step surface.

[0016] In this technical solution, the movement range of the locking member within the first cavity is limited by the cooperation between the first limiting member and the first stepped surface. By rotating the locking member, the valve stem is moved along the first direction, so that the arc-shaped sealing surface moves away from or closer to the conical sealing surface, thereby realizing the opening and sealing of the inflation valve.

[0017] In some technical solutions, optionally, the cavity wall of the first cavity segment is provided with a first slot, and at least a portion of the first limiting member is provided in the first slot.

[0018] In this technical solution, the first slot is used to provide installation space for the first limiting member, which helps to improve the installation accuracy of the first limiting member and can also largely prevent the first limiting member from coming out of the first cavity.

[0019] In some technical solutions, the inflation valve may optionally include: a second limiting member, which is engaged in the third cavity section, and the second limiting member is located on the side of the valve stem away from the locking member; the second limiting member is used to limit the range of movement of the valve stem in the first direction.

[0020] In this technical solution, by setting a second limiting member, the range of movement of the valve stem in the first direction can be limited to prevent the valve stem from coming out of the third chamber during movement, and also to prevent the valve stem from disengaging from the locking member through the threaded connection.

[0021] In some technical solutions, optionally, a second slot is provided on the cavity wall of the third cavity, and at least a portion of the second limiting member is provided in the second slot.

[0022] In this technical solution, the second slot is used to provide installation space for the second limiting member, which helps to improve the installation accuracy of the second limiting member and can also largely prevent the second limiting member from coming out of the third cavity.

[0023] In some technical solutions, optionally, the outer wall of the valve body is provided with a mounting groove, and a sealing ring is provided in the mounting groove.

[0024] In this technical solution, a sealing connection between the valve body and the container body can be achieved by setting a sealing ring.

[0025] The second aspect of this utility model provides an energy storage device, comprising: an energy storage body; and an air filling valve as described in any of the above technical solutions, connected to the energy storage body.

[0026] Since the accumulator includes the air filling valve of any of the above technical solutions, it has the beneficial effects of any of the above technical solutions, which will not be elaborated here.

[0027] The third aspect of this utility model provides an oil-gas suspension cylinder, comprising: a cylinder body; and an air filling valve as described in any of the above technical solutions, connected to the cylinder body.

[0028] Since the oil-gas suspension cylinder includes the air charging valve in any of the above technical solutions, it has the beneficial effects of any of the above technical solutions, which will not be elaborated here.

[0029] Additional aspects and advantages of the present invention will become apparent in the following description or may be learned by practice of the present invention. Attached Figure Description

[0030] Figure 1 A schematic diagram of an inflation valve in a locked state according to an embodiment of the present invention is shown;

[0031] Figure 2 A schematic diagram of an inflation valve in an inflation state according to an embodiment of the present invention is shown;

[0032] Figure 3 A schematic diagram of an inflation valve in a deflation state according to an embodiment of the present invention is shown;

[0033] Figure 4 A schematic diagram of an energy storage device according to an embodiment of the present invention is shown;

[0034] Figure 5 A schematic diagram of an energy storage device according to another embodiment of the present invention is shown;

[0035] Figure 6 A schematic diagram of an energy storage device according to another embodiment of the present invention is shown;

[0036] Figure 7 A schematic diagram of an oil-gas suspension cylinder according to an embodiment of the present invention is shown.

[0037] in, Figures 1 to 7 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0038] 1: Inflation valve; 10: Valve body; 101: First part; 102: Second part; 103: Second stepped surface; 104: Mounting cavity; 105: Mounting groove; 106: Sealing ring; 111: First cavity section; 112: Second cavity section; 113: Third cavity section; 114: First stepped surface; 115: Supporting stepped surface; 116: Conical sealing surface; 12: Locking element; 14: Valve stem; 142: Arc-shaped sealing surface; 16: Reset elastic element; 18: Annular sealing element; 191: First limiting element; 192: First slot; 193: Second limiting element; 194: Second slot; 2: Accumulator; 20: Accumulator body; 3: Oil-gas suspension cylinder; 30: Cylinder body; a: First direction; b: Second direction. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of the embodiments of this utility model, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, embodiments of the present invention may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0041] Gas filling valves are typically used in enclosed containers such as accumulators or oil-gas suspension cylinders to seal high-pressure gases.

[0042] In related technologies, the accumulator's charging valve employs a line seal and a valve core structure. This design, using the line seal as a buffer seal and the valve core as the main seal, has the following limitations: First, the valve core is prone to bending during high-pressure venting of the accumulator; second, after the line seal is opened (after the sealing state is released), the air path typically splits into two, resulting in numerous leakage points. If foreign objects are present at the line seal, the airtightness is severely compromised; third, it requires high precision in the machining of the valve core and valve sleeve.

[0043] It should be noted that "line seal" here refers to the sealing between the valve sleeve and the valve core through line contact.

[0044] This invention aims to provide a charging valve, accumulator, and oil-gas suspension cylinder. In the sealed state, the valve body and valve stem achieve surface contact through an annular seal, eliminating the need for a valve core structure and preventing valve core bending. Because the valve body and valve stem are sealed via surface contact, the sealing effect is better and more reliable than line contact, resulting in fewer leakage points after the seal is broken. Furthermore, since the valve body and valve stem achieve surface contact through the annular seal, the machining precision of the valve body and valve stem does not need to be very high, making it suitable for rapid production.

[0045] In related technologies, the inflation valve uses a structure of a sealing gasket and a return spring. This design has the following limitations: First, when the accumulator is under high pressure, the operator needs to press the valve core vertically to provide a large force to overcome the pressure of the high-pressure gas and the spring, making inflation extremely inconvenient and posing a safety hazard; Second, when the accumulator is under low pressure, it mainly relies on the spring for reset, resulting in poor airtightness, and there is a safety hazard if the spring fails.

[0046] In this invention, the valve stem and locking element are threaded together. During the rotation of the locking element relative to the valve body, the valve stem can move relative to the valve body in a first direction, causing the arc-shaped sealing surface to move away from or towards the conical sealing surface, thus achieving the opening and sealing of the inflation valve. As the locking element rotates in the first rotation direction, the arc-shaped sealing surface gradually approaches the conical sealing surface, and the annular seal between the two sealing surfaces is compressed and deformed, filling the gap between the sealing surfaces to achieve surface contact between the valve body and the valve stem. As the locking element rotates in a second rotation direction, the arc-shaped sealing surface gradually moves away from the conical sealing surface, releasing the seal and allowing the valve to enter either an intake or exhaust state according to actual requirements.

[0047] This utility model's inflation valve offers two high-pressure venting methods. The first method involves the operator pressing the locking nut to move the arc-shaped sealing surface of the valve body away from the conical sealing surface, thus releasing the valve's seal. The second method involves rotating the locking element in a second rotation direction, causing the arc-shaped sealing surface to gradually move away from the conical sealing surface, thereby releasing the seal. When the inflation valve needs to be in a venting state for an extended period, the second high-pressure venting method can be used, which is convenient, quick, and helps reduce safety hazards. Furthermore, by rotating the locking element to seal the valve body and valve stem, rather than relying solely on the pressure of the return spring, this design helps ensure the airtightness between the valve body and valve stem when sealed, reducing the safety hazard in case of return spring failure.

[0048] It should be noted that an inflation valve is a high-pressure gas sealing and on / off control device used in sealed containers. Its core function is to realize the injection, sealing and release of gas, and to ensure airtightness under high-pressure environments.

[0049] An accumulator is a closed container that stores high-pressure gas energy and can release it as needed. It is widely used in hydraulic and pneumatic systems to buffer, regulate, or supply energy in emergencies by utilizing the compressibility of gas.

[0050] A hydropneumatic suspension cylinder is a buffer support device used in vehicle suspension systems. It achieves shock absorption, load bearing, and attitude adjustment through the synergistic action of high-pressure gas and hydraulic oil, and is widely used in heavy vehicles (such as engineering vehicles and off-road vehicles).

[0051] The following reference Figures 1 to 7 The present invention describes an air valve, an accumulator, and a hydropneumatic suspension cylinder according to some embodiments thereof.

[0052] In one embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 3 As shown, the inflation valve 1 includes a valve body 10, a locking element 12, a valve stem 14, and a reset elastic element 16.

[0053] The valve body 10 has a mounting cavity 104. A locking member 12 is rotatably disposed within the mounting cavity 104 and is movable relative to the valve body 10 along a first direction a. A valve stem 14 is disposed within the mounting cavity 104 and is threadedly connected to the locking member 12. During the rotation of the locking member 12 relative to the valve body 10, the valve stem 14 is movable relative to the valve body 10 along the first direction a. A reset elastic member 16 is disposed within the mounting cavity 104 and sleeved on the valve stem 14. One end of the reset elastic member 16 abuts against the locking member 12, and the other end abuts against the cavity wall of the mounting cavity 104.

[0054] The mounting cavity 104 has a conical sealing surface 116, and the valve stem 14 has an arc-shaped sealing surface 142. An annular sealing element 18 is provided on the arc-shaped sealing surface 142. During the rotation of the locking element 12 relative to the valve body 10, the arc-shaped sealing surface 142 moves away from or closer to the conical sealing surface 116 to realize the opening and sealing of the inflation valve 1.

[0055] The valve body 10 is also called the valve sleeve, the valve stem 14 is also called the valve core, and the mounting cavity 104 is also called the valve chamber. The mounting cavity 104 is used to house or install components such as the locking element 12, the valve stem 14, and the reset elastic element 16. The valve body 10 is used to form a sealing connection with the container body of a closed container. The container body of the closed container is used to store gas.

[0056] It should be noted that the sealed container is either the accumulator 2 or the oil-gas suspension cylinder 3. The container body of the sealed container refers to the accumulator body 20 of the accumulator 2 or the cylinder body 30 of the oil-gas suspension cylinder 3.

[0057] The locking member 12, located within the mounting cavity 104, has at least two degrees of freedom relative to the valve body 10. The first degree of freedom is that the locking member 12 can rotate relative to the valve body 10. The second degree of freedom is that the locking member 12 can move relative to the valve body 10 along a first direction a.

[0058] The valve stem 14, located within the mounting cavity 104, has only one degree of freedom relative to the valve body 10: the freedom to move along the first direction a. The valve body 10 restricts the circumferential rotation of the valve stem 14. During the rotation of the locking member 12 relative to the valve body 10, the valve stem 14 cannot rotate with the locking member 12; it can only move relative to the valve body 10 along the first direction a.

[0059] It should be noted that the first direction 'a' can be the length direction of the inflation valve 1, the axial direction of the locking member 12, or the axial direction of the valve stem 14.

[0060] The reset elastic element 16 ensures that the arc-shaped sealing surface 142 always tends to move toward the conical sealing surface 116 before the inflation tool is removed and the valve is locked, thus ensuring that the inflation valve 1 is in a sealed state.

[0061] This invention aims to provide an inflation valve 1. During the rotation of the locking member 12 in a first rotation direction, the arc-shaped sealing surface 142 gradually approaches the conical sealing surface 116. The annular sealing member 18 between the two sealing surfaces is compressed and deformed, filling the gap between the sealing surfaces to achieve surface contact between the valve body 10 and the valve stem 14. During the rotation of the locking member 12 in a second rotation direction, the arc-shaped sealing surface 142 gradually moves away from the conical sealing surface 116 to release the seal, allowing the valve to enter either an intake or exhaust state according to actual requirements. In the sealed state, the valve body 10 and valve stem 14 achieve surface contact through the annular sealing member 18. This design significantly improves the sealing effect and increases reliability.

[0062] It should be emphasized that the two sealing surfaces adopt a conical sealing surface 116 and an arc-shaped sealing surface 142 respectively. When the two seals are close to each other, the two sealing surfaces do not directly contact each other, but rather achieve surface contact through the seals. This design method has better sealing effect and higher reliability.

[0063] In the sealed state, the valve body 10 and valve stem 14 achieve surface contact through an annular seal 18, eliminating the need for a valve core structure and preventing valve core bending. Because the valve body 10 and valve stem 14 are sealed through surface contact, the sealing effect is better and more reliable than line contact, resulting in fewer leakage points after the seal is broken. Furthermore, since the valve body 10 and valve stem 14 achieve surface contact through the annular seal 18, the machining precision of the valve body 10 and valve stem 14 does not need to be very high, making it suitable for rapid production.

[0064] In one specific embodiment, the first rotation direction is clockwise, and the second rotation direction is counterclockwise.

[0065] Rotating the locking member 12 clockwise causes the arc-shaped sealing surface 142 to gradually approach the conical sealing surface 116. The annular seal 18 between the two sealing surfaces is compressed and deformed, filling the gap between the sealing surfaces to achieve surface contact between the valve body 10 and the valve stem 14. Rotating the locking member 12 counterclockwise causes the arc-shaped sealing surface 142 to gradually move away from the conical sealing surface 116, thus releasing the seal and allowing the valve to enter either the intake or exhaust state as required.

[0066] In some embodiments, the container body of the sealed container is optionally used to store a gas, such as nitrogen, and the type and pressure of the gas can be flexibly set according to actual needs.

[0067] In some embodiments, the locking element 12 may be a locking nut or other types of rotatable components.

[0068] In one specific embodiment, the mounting cavity 104 includes at least two sections. One of the sections has a circular cross-sectional shape, and the locking member 12 is disposed within this section. The locking member 12 has a circular cross-sectional shape. The locking member 12 is rotatable relative to the valve body 10, and the locking member 12 is movable relative to the valve body 10 along a first direction a.

[0069] The other cavity has a cross-sectional shape that is elliptical, triangular, quadrilateral, pentagonal, or hexagonal. The valve stem 14 is located within this cavity, and its cross-sectional shape is adapted to the cross-sectional shape of this cavity. With this design, the valve stem 14 cannot rotate with the locking member 12, but can only move relative to the valve body 10 along the first direction a.

[0070] In one specific embodiment, the reset elastic element 16 is a reset spring.

[0071] In one specific embodiment, the reset elastic element 16 is a reset spring.

[0072] In one specific embodiment, the annular seal 18 is a rubber seal.

[0073] In some embodiments, optionally, the portion of the valve stem 14 having the arcuate sealing surface 142 serves as the main sealing structure. The main sealing structure and the conical sealing surface 116 of the valve body 10 achieve surface contact through a rubber seal.

[0074] The inflation valve 1 is automatically closed by a reset elastic element 16 (such as a return spring). The reset elastic element 16 ensures that the arc-shaped sealing surface 142 always tends to move closer to the conical sealing surface 116, thus ensuring that the inflation valve 1 is in a sealed state. The operator can drive the valve stem 14 by tightening the lock nut (a specific form of the locking element 12) and the thread on the valve stem 14, making the main sealing structure tightly adhere to the mating conical surface (conical sealing surface 116) of the valve body 10, ensuring reliable sealing. During venting, the valve stem 14 is opened outward by tightening the lock nut (by rotating the lock nut counterclockwise to move the arc-shaped sealing surface 142 away from the conical sealing surface 116), overcoming the problem of difficulty in opening the inflation valve 1 under high pressure.

[0075] In some embodiments, optionally, the valve stem 14 is provided with a main sealing structure, which is used to fit against the conical sealing surface 116 of the valve body 10 to achieve a seal. A return spring (a specific form of the return elastic element 16) can ensure that the seal is tightly fitted at all times. A thread is provided on the valve stem 14 for threaded connection with a lock nut. When the lock nut rotates counterclockwise upwards and touches the upper limit retaining ring (a specific form of the first limiting element 191), the lock nut stops axial movement (stops moving along the first direction a). Continuing to rotate the lock nut at this time drives the valve stem 14 to move axially downwards (downwards along the first direction a), opening the valve core. Conversely, when the lock nut rotates clockwise and contacts the lower limit step (first step surface 114) of the valve body 10, continuing to rotate the lock nut will cause the valve stem 14 to move upwards, making the two sealing surfaces fit more tightly. The lower limit retaining ring (a specific form of the second limiting element 193) prevents the valve stem 14 from dislodging from the lock nut.

[0076] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the mounting cavity 104 includes a first cavity segment 111, a second cavity segment 112, and a third cavity segment 113 that are connected. The connecting wall between the first cavity segment 111 and the second cavity segment 112 is a first stepped surface 114. The connecting wall between the third cavity segment 113 and the second cavity segment 112 is a conical sealing surface 116.

[0077] Optionally, the dimension of the first cavity segment 111 is larger than the dimension of the second cavity segment 112. When both the first cavity segment 111 and the second cavity segment 112 have circular cross-sectional shapes, the radial dimension of the first cavity segment 111 is larger than the radial dimension of the second cavity segment 112. When the first cavity segment 111 has a circular cross-sectional shape, and the second cavity segment 112 has an elliptical, triangular, quadrilateral, pentagonal, or hexagonal cross-sectional shape, the radial dimension of the first cavity segment 111 is larger than the maximum dimension of the second cavity segment 112 in the second direction b. The second direction b is perpendicular to the first direction a.

[0078] Therefore, the first cavity segment 111 and the second cavity segment 112 form a stepped structure, and the connecting wall between the first cavity segment 111 and the second cavity segment 112 is the first stepped surface 114.

[0079] At least a portion of the locking member 12 is disposed within the first cavity 111. The locking member 12, located within the first cavity 111, is rotatable relative to the valve body 10 and is movable relative to the valve body 10 along a first direction a. The first stepped surface 114 is used to limit the range of movement of the locking member 12 in the first direction a.

[0080] like Figure 1As shown, when the inflation valve 1 needs to enter the locked state (i.e. the sealed state), the locking member 12 is rotated in the first rotation direction. When the locking member 12 touches the first step surface 114, the continued rotation of the locking member 12 will cause the valve stem 14 to move continuously in the axial direction until the main sealing structure of the valve body 10 is tightly fitted with the conical sealing surface 116 to ensure the reliability of the sealing state.

[0081] Optionally, the size of the second cavity segment 112 is smaller than the size of the third cavity segment 113. When the cross-sectional shape of the second cavity segment 112 is circular and the cross-sectional shape of the third cavity segment 113 is elliptical, triangular, quadrilateral, pentagonal, or hexagonal, the radial dimension of the second cavity segment 112 is greater than the maximum dimension of the third cavity segment 113 in the second direction b. When the cross-sectional shape of the second cavity segment 112 is elliptical, triangular, quadrilateral, pentagonal, or hexagonal, and the cross-sectional shape of the third cavity segment 113 is circular, the maximum dimension of the second cavity segment 112 in the second direction b is smaller than the radial dimension of the third cavity segment 113. When the cross-sectional shape of the second cavity segment 112 is elliptical, triangular, quadrilateral, pentagonal, or hexagonal, and the cross-sectional shape of the third cavity segment 113 is elliptical, triangular, quadrilateral, pentagonal, or hexagonal, the maximum dimension of the second cavity segment 112 in the second direction b is smaller than the maximum dimension of the third cavity segment 113 in the second direction b.

[0082] The conical sealing surface 116 is the transition surface between the second cavity section 112 and the third cavity section 113.

[0083] The second cavity 112 is provided with a support step surface 115, and the end of the reset elastic member 16 away from the locking member 12 is used to abut against the support step surface 115.

[0084] By providing the support step surface 115, the support stability of the reset elastic element 16 is improved. The reset elastic element 16 is used to provide elastic force to the locking element 12 and the valve stem 14 in the connected state (threaded connection), so that the arc-shaped sealing surface 142 always tends to move closer to the conical sealing surface 116, thereby ensuring that the inflation valve 1 is in a sealed state under low pressure.

[0085] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, at least a portion of the locking member 12 is disposed within the second cavity 112.

[0086] In the locking member 12, one part is located in the first cavity 111, and the other part is located in the cavity. The locking member 12 located in the mounting cavity 104 can rotate relative to the valve body 10 and can move relative to the valve body 10 along the first direction a.

[0087] The valve stem 14 is located within the second chamber 112 and the third chamber 113. The cross-sectional shape of the valve body 10 is adapted to the cross-sectional shape of the mounting cavity 104. During the rotation of the locking member 12 relative to the valve body 10, the valve stem 14 cannot rotate with the locking member 12, but can only move relative to the valve body 10 along the first direction a.

[0088] The locking element 12 is fitted onto the valve stem 14 to achieve a threaded connection.

[0089] It should be noted that the locking member 12 located in the second cavity 112 is sleeved on the valve stem 14 located in the second cavity 112, and the locking member 12 is threadedly connected to the valve stem 14.

[0090] By precisely setting the positions of the locking member 12 and the valve stem 14 within the mounting cavity 104, it is ensured that when the locking member 12 rotates relative to the valve body 10, the valve stem 14 can move relative to the valve body 10 along the first direction a, so that the arc-shaped sealing surface 142 moves away from or closer to the conical sealing surface 116, thereby realizing the opening and sealing of the inflation valve 1.

[0091] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the inflation valve 1 also includes a first limiting member 191. The first limiting member 191 is engaged within the first cavity 111. The first limiting member 191 is used to limit the range of movement of the locking member 12 in the first direction a. At least a portion of the locking member 12 is disposed between the first limiting member 191 and the first stepped surface 114.

[0092] The first stepped surface 114 is the connecting wall between the first cavity segment 111 and the second cavity segment 112. A portion of the locking member 12 is disposed in the first cavity segment 111, and the locking member 12 disposed in the first cavity segment 111 is located between the first limiting member 191 and the first stepped surface 114.

[0093] Therefore, the interaction between the first limiting member 191 and the first stepped surface 114 restricts the movement range of the locking member 12 within the first cavity 111. By rotating the locking member 12, the valve stem 14 is moved along the first direction a, so that the arc-shaped sealing surface 142 moves away from or closer to the conical sealing surface 116, thereby realizing the opening and sealing of the inflation valve 1.

[0094] like Figure 1 As shown, when the inflation valve 1 needs to enter the locked state (i.e. the sealed state), the locking member 12 is rotated in the first rotation direction. When the locking member 12 touches the first step surface 114, the continued rotation of the locking member 12 will cause the valve stem 14 to move continuously in the axial direction until the main sealing structure of the valve body 10 is tightly fitted with the conical sealing surface 116 to ensure the reliability of the sealing state.

[0095] like Figure 2 As shown, when the inflation valve 1 needs to enter the inflation state, the locking member 12 is rotated in the second rotation direction, so that the locking member 12 is separated from the first step surface 114 by a certain distance (at this time, the locking member 12 is not in contact with the first limiting member 191). Under the elastic force of the reset elastic member 16 and the action of the high-pressure gas in the container body, the main sealing structure of the valve stem 14 is pressed against the conical sealing surface 116 of the valve body 10, and is always in a sealed state. The external high-pressure gas source enters the inflation valve 1, pushing the locking member 12 and the valve stem 14 to move axially together (in this process, the elastic force of the reset elastic member 16 and the action of the high-pressure gas in the container body are overcome), opening the valve core (the inflation valve 1 is in the open state), and the external high-pressure gas source enters the container body.

[0096] When the inflation valve 1 needs to be released, the locking member 12 is rotated in the second rotation direction to separate the locking member 12 from the first step surface 114 by a certain distance (at this time, the locking member 12 is not in contact with the first limit member 191). The operator presses the locking nut to move the arc-shaped sealing surface 142 of the valve body 10 away from the conical sealing surface 116, thereby releasing the sealing state of the inflation valve 1.

[0097] Or, such as Figure 3 As shown, when the inflation valve 1 needs to enter the deflation state, the locking member 12 is rotated in the second rotation direction. When the locking member 12 touches the first limit member 191, continuing to rotate the locking member 12 will cause the valve stem 14 to move continuously along the axial direction until the main sealing structure of the valve body 10 separates from the conical sealing surface 116, opening the valve core (the inflation valve 1 is in the open state). The high-pressure gas in the container body flows out from the inflation valve 1, realizing deflation.

[0098] The inflation valve 1 of this utility model has two high-pressure venting methods. The first method involves the operator pressing the locking nut to move the arc-shaped sealing surface 142 of the valve body 10 away from the conical sealing surface 116, thereby releasing the seal of the inflation valve 1. The second method involves rotating the locking member 12 in the second rotation direction, causing the arc-shaped sealing surface 142 to gradually move away from the conical sealing surface 116, thus releasing the seal. When the inflation valve 1 needs to be in a venting state for an extended period, the second high-pressure venting method can be used, which is convenient, quick, and helps reduce safety hazards. Furthermore, by rotating the locking member 12 to seal the valve body 10 and valve stem 14, rather than relying solely on the pressure of the return spring, this design helps ensure the airtightness between the valve body 10 and valve stem 14 in the sealed state, reducing the safety hazard in case of return spring failure.

[0099] It should be noted that, in Figure 2 and Figure 3In the diagram, the arrow near the bottom of valve stem 14 indicates the direction of gas flow.

[0100] In one specific embodiment, the inflation valve 1 has at least three states: a locked state (sealed state), an inflation state, and a deflation state.

[0101] When the inflation valve 1 needs to enter the locked state, turn the locking nut (a specific form of locking element 12) clockwise. When the locking nut touches the lower limit step (first step surface 114), continue to turn the locking nut to make the valve stem 14 move upward until the main sealing structure of the valve body 10 is tightly fitted with the conical sealing surface 116 to ensure the reliability of the sealing state.

[0102] When inflation valve 1 needs to be inflated, the locking nut is rotated counterclockwise, separating it from the lower limit step by a certain distance (at this time, the locking nut is not in contact with the upper limit retaining spring). Under the elastic force of the return spring (a specific form of the return elastic element 16) and the pressure of the high-pressure gas inside the container, the main sealing structure of the valve stem 14 is pressed against the conical sealing surface 116 of the valve body 10, maintaining a sealed state at all times. When the external high-pressure gas source enters inflation valve 1, it pushes the locking element 12 and the valve stem 14 to move axially together, opening the valve core (inflation valve 1 is in the open state), allowing the external high-pressure gas source to enter the container body.

[0103] When the inflation valve 1 needs to be in the deflation state, turn the locking nut counterclockwise. When the locking nut touches the upper limit snap ring (a specific form of the first limit member 191), continue to turn the locking nut to make the valve stem 14 move downward, open the valve core (the inflation valve 1 is in the open state), and the high-pressure gas in the container body flows out from the inflation valve 1 to achieve deflation.

[0104] In one specific embodiment, the first limiting member 191 is an upper limit snap ring, that is, the first limiting member 191 is a snap ring structure. With this design, the first limiting member 191 can not only limit the movement range of the locking member 12, but also play a buffering role to avoid rigid collision between the first limiting member 191 and the locking member 12.

[0105] In one specific embodiment, the first limiting member 191 is a limiting plate.

[0106] It should be noted that when the inflation valve 1 needs to enter the locked state, by rotating the locking member 12, the main sealing structure of the valve stem 14 is tightly fitted with the conical sealing surface 116 of the valve body 10, ensuring airtightness under low pressure and improving the reliability of the sealing state.

[0107] When the inflation valve 1 needs to be in the deflation state, the valve core is opened by rotating the locking part 12 (the inflation valve 1 is in the open state). Under the action of high pressure gas, the valve core opening force is very small, making it easier to operate manually.

[0108] In some embodiments, the locking nut may optionally have a first airflow channel. The valve stem 14 may have a second airflow channel. The first airflow channel communicates with the second airflow channel. The space between the arc-shaped sealing surface 142 and the conical sealing surface 116 communicates with the second airflow channel.

[0109] It should be noted that both the first and second airflow channels are single-channel, resulting in fewer gas leakage points and a simpler and more reliable structure.

[0110] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the cavity wall of the first cavity 111 is provided with a first slot 192, and at least a portion of the first limiting member 191 is provided in the first slot 192.

[0111] The first slot 192 is used to provide installation space for the first limiting member 191, which helps to improve the installation accuracy of the first limiting member 191 and can also largely prevent the first limiting member 191 from coming out of the first cavity 111.

[0112] In some embodiments, the first slot 192 may optionally be provided with a buffer layer, which can play a buffering role and reduce the wear on the slot wall.

[0113] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the inflation valve 1 also includes a second limiting member 193. The second limiting member 193 is engaged within the third cavity section 113 and is located on the side of the valve stem 14 away from the locking member 12. The second limiting member 193 is used to limit the range of movement of the valve stem 14 in the first direction a.

[0114] By setting the second limiting member 193, the movement range of the valve stem 14 in the first direction a can be limited, so as to prevent the valve stem 14 from coming out of the third cavity section 113 during movement, and also to prevent the valve stem 14 from being disconnected from the locking member 12 from the threaded connection.

[0115] In one specific embodiment, the second limiting member 193 is a lower limiting spring, that is, the second limiting member 193 is a snap ring structure. With this design, the second limiting member 193 can not only limit the movement range of the valve stem 14, but also play a buffering role to avoid rigid collision between the second limiting member 193 and the valve stem 14.

[0116] In one specific embodiment, the second limiting member 193 is a limiting plate.

[0117] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the third cavity 113 has a second slot 194 on its cavity wall, and at least a portion of the second limiting member 193 is located in the second slot 194.

[0118] The second slot 194 provides installation space for the second limiting member 193, which helps to improve the installation accuracy of the second limiting member 193 and can also largely prevent the second limiting member 193 from coming out of the third cavity 113.

[0119] In some embodiments, the second slot 194 may optionally be provided with a buffer layer, which can play a buffering role and reduce the wear on the slot wall.

[0120] In some embodiments, optionally, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the outer wall of the valve body 10 is provided with a mounting groove 105, and a sealing ring 106 is provided in the mounting groove 105.

[0121] The valve body 10 is connected to the container body of a closed container (such as the accumulator 2 or the oil-gas suspension cylinder 3). The outer wall of the valve body 10 is provided with a mounting groove 105, and a sealing ring 106 is provided in the mounting groove 105. By providing the sealing ring 106, a sealed connection between the valve body 10 and the container body can be achieved.

[0122] In one specific embodiment, the sealing ring 106 is an O-ring.

[0123] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the valve body 10 includes a first part 101 and a second part 102. The size of the first part 101 is larger than the size of the second part 102. The first part 101 and the second part 102 form a stepped structure.

[0124] When both the first part 101 and the second part 102 are cylinders, the radial dimension (e.g., diameter) of the first part 101 is greater than the radial dimension of the second part 102.

[0125] Since the first part 101 and the second part 102 form a stepped structure, the connecting wall between the first part 101 and the second part 102 is the second stepped surface 103. The second stepped surface 103 is used to abut against and connect with the container body.

[0126] A sealing groove is provided on the second step surface 103, and a sealing ring 106 is provided in the sealing groove to achieve a sealed connection between the second step surface 103 and the container body.

[0127] In some embodiments, the valve body 10 may be an integral structure or a split structure.

[0128] In one specific embodiment, the first part 101 and the second part 102 are integral structures, which have better mechanical properties and higher connection strength compared to post-processing methods, which helps to reduce the number of parts and improve assembly efficiency.

[0129] In one specific embodiment, the first part 101 and the second part 102 are separate structures. The first part 101 and the second part 102 are detachably connected, which facilitates disassembly and assembly by workers and is beneficial for maintenance or replacement.

[0130] In one embodiment of this utility model, such as Figure 4 , Figure 5 and Figure 6 As shown, the accumulator 2 includes an accumulator body 20 and an inflation valve 1 as described in any of the above embodiments. The inflation valve 1 is connected to the accumulator body 20.

[0131] Since the accumulator 2 includes the air valve 1 in any of the above embodiments, it has the beneficial effects of any of the above embodiments, which will not be repeated here.

[0132] Optionally, the second stepped surface 103 is used to abut and connect with the accumulator body 20. A sealing groove is provided on the second stepped surface 103, and a sealing ring 106 is provided in the sealing groove to achieve a sealed connection between the second stepped surface 103 and the accumulator body 20.

[0133] It should be noted that, in Figure 5 and Figure 6 In the diagram, the arrow near the bottom of valve stem 14 indicates the direction of gas flow.

[0134] In one embodiment of this utility model, such as Figure 7 As shown, the hydropneumatic suspension cylinder 3 includes a cylinder body 30 and an inflation valve 1 as described in any of the above embodiments. The inflation valve 1 is connected to the cylinder body 30.

[0135] Since the oil-gas suspension cylinder 3 includes the air charging valve 1 in any of the above embodiments, it has the beneficial effects of any of the above embodiments, which will not be repeated here.

[0136] Optionally, the second stepped surface 103 is used to abut and connect with the cylinder body 30. A sealing groove is provided on the second stepped surface 103, and a sealing ring 106 is provided in the sealing groove to achieve a sealed connection between the second stepped surface 103 and the cylinder body 30.

[0137] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0138] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit 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.

[0139] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0140] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An inflation valve, characterized in that, include: The valve body (10) has a mounting cavity (104); A locking member (12) is rotatably disposed in the mounting cavity (104), and the locking member (12) is movable relative to the valve body (10) in a first direction; A valve stem (14) is disposed in the mounting cavity (104), and the valve stem (14) is threadedly connected to the locking member (12); during the rotation of the locking member (12) relative to the valve body (10), the valve stem (14) can move relative to the valve body (10) along the first direction; A reset elastic element (16) is disposed in the mounting cavity (104). The reset elastic element (16) is sleeved on the valve stem (14). One end of the reset elastic element (16) is used to abut against the locking element (12), and the other end of the reset elastic element (16) is used to abut against the cavity wall of the mounting cavity (104). The mounting cavity (104) has a conical sealing surface (116), the valve stem (14) has an arc-shaped sealing surface (142), and an annular sealing element (18) is provided on the arc-shaped sealing surface (142). During the rotation of the locking element (12) relative to the valve body (10), the arc-shaped sealing surface (142) moves away from or closer to the conical sealing surface (116) to realize the opening and sealing of the inflation valve.

2. The inflation valve according to claim 1, characterized in that, The mounting cavity (104) includes a first cavity segment (111), a second cavity segment (112), and a third cavity segment (113) that are connected. The connecting wall between the first cavity segment (111) and the second cavity segment (112) is a first stepped surface (114); The connecting wall between the third cavity section (113) and the second cavity section (112) is the conical sealing surface (116); At least a portion of the locking member (12) is disposed within the first cavity (111), and the first stepped surface (114) is used to limit the range of movement of the locking member (12) in the first direction; The second cavity (112) is provided with a support step surface (115), and the end of the reset elastic member (16) away from the locking member (12) is used to abut against the support step surface (115).

3. The inflation valve according to claim 2, characterized in that, At least a portion of the locking member (12) is disposed within the second cavity (112); The valve stem (14) is disposed in the second cavity section (112) and the third cavity section (113); The locking element (12) is sleeved on the valve stem (14) to achieve a threaded connection.

4. The inflation valve according to claim 2, characterized in that, Also includes: The first limiting member (191) is engaged in the first cavity (111), and the first limiting member (191) is used to limit the range of movement of the locking member (12) in the first direction; At least a portion of the locking member (12) is disposed between the first limiting member (191) and the first stepped surface (114).

5. The inflation valve according to claim 4, characterized in that, The cavity wall of the first cavity segment (111) is provided with a first slot (192), and at least a portion of the first limiting member (191) is provided in the first slot (192).

6. The inflation valve according to any one of claims 2 to 5, characterized in that, Also includes: The second limiting member (193) is engaged in the third cavity (113), and the second limiting member (193) is located on the side of the valve stem (14) away from the locking member (12); The second limiting member (193) is used to limit the range of movement of the valve stem (14) in the first direction.

7. The inflation valve according to claim 6, characterized in that, The third cavity (113) has a second slot (194) on its cavity wall, and at least a portion of the second limiting member (193) is located in the second slot (194).

8. The inflation valve according to any one of claims 1 to 5, characterized in that, The outer wall of the valve body (10) is provided with a mounting groove (105), and a sealing ring (106) is provided in the mounting groove (105).

9. An energy storage device, characterized in that, include: Accumulator body (20); The inflation valve as described in any one of claims 1 to 8 is connected to the accumulator body (20).

10. A hydropneumatic suspension cylinder, characterized in that, include: Cylinder block (30); The inflation valve as described in any one of claims 1 to 8 is connected to the cylinder (30).

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