Inflation valve, energy accumulator and hydro-pneumatic suspension cylinder

Abstract

The invention provides an inflation valve, an energy accumulator and a hydro-pneumatic suspension cylinder, and relates to the technical field of high-pressure gas sealing. The locking piece is rotatably arranged in the mounting cavity and can move in the first direction; the valve rod is arranged in the mounting cavity and is in threaded connection with the locking piece; when the locking piece rotates, the valve rod can move in the first direction. The reset elastic piece is arranged in the mounting cavity and sleeves the valve rod, and the two ends of the reset elastic piece abut against the locking piece and the cavity wall of the mounting cavity respectively; the installation cavity is provided with a conical sealing face, the valve rod is provided with an arc-shaped sealing face, and an annular sealing piece is arranged on the arc-shaped sealing face. In the process that the locking piece rotates relative to the valve body, the arc-shaped sealing face is far away from or close to the conical sealing face, so that opening and sealing of the inflation valve are achieved. According to the technical scheme, in the process of achieving the sealing state, the annular sealing piece is extruded to deform and fills the gap so as to achieve surface contact, the sealing effect can be improved, and reliability is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure gas sealing, and in particular to an inflation valve, an accumulator and an oil-gas suspension cylinder. Background Art

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

[0003] In the inflation valve of the related art, the valve body and the valve stem are sealed by line contact, which has poor sealing performance and low reliability. Summary of the Invention

[0004] In order to solve or improve the technical problem of poor sealing performance and low reliability in a sealing method using line contact, an object of the present invention is to provide an inflation valve.

[0005] Another object of the present invention is to provide an accumulator.

[0006] Another object of the present invention is to provide an oil-gas suspension cylinder.

[0007] To achieve the above-mentioned objectives, the first aspect of the present invention provides an inflation valve, comprising: a valve body, having an installation cavity; a locking member, rotatably arranged in the installation cavity, and the locking member can move relative to the valve body in a first direction; a valve stem, arranged in the installation cavity, and the valve stem is threadedly connected to the locking member; during the rotation of the locking member relative to the valve body, the valve stem can move relative to the valve body in a first direction; a reset elastic member, arranged in the installation cavity, the reset elastic member is sleeved on the valve stem, one end of the reset elastic member is used to abut against the locking member, and the other end of the reset elastic member is used to abut 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 approaches the conical sealing surface to achieve opening and sealing of the inflation valve.

[0008] The present invention aims to provide an inflation valve, in which, during the process of rotating the locking member along a first rotation direction, the arcuate sealing surface gradually approaches the conical sealing surface, and the annular seal between the two sealing surfaces is squeezed and deformed, filling the gap between the sealing surfaces to achieve surface contact between the valve body and the valve stem. During the process of rotating the locking member along a second rotation direction, the arcuate sealing surface gradually moves away from the conical sealing surface to release the sealing state and enter the intake state or exhaust state according to actual requirements. Surface contact is achieved between the valve body and the valve stem in the sealed state through the annular seal. This design method is conducive to significantly improving the sealing effect and is more reliable.

[0009] It should be emphasized that the two sealing surfaces are respectively a conical sealing surface and an arc-shaped sealing surface, and when the two sealing surfaces are close to each other, the two sealing surfaces are not in direct contact, but are in surface contact through the sealing member. In this design, the sealing effect is better and the reliability is higher.

[0010] In some embodiments, the mounting cavity comprises a first cavity section, a second cavity section and a third cavity section which are communicated; a connecting wall surface between the first cavity section and the second cavity section is a first step surface; a connecting wall surface between the third cavity section and the second cavity section is a conical sealing surface; at least a part of the locking member is arranged in the first cavity section, and the first step surface is used to limit the movement range of the locking member in the first direction; a supporting step surface is arranged in the second cavity section, and the end of the reset elastic member away from the locking member is used to abut against the supporting step surface.

[0011] In this embodiment, 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, and when the locking member touches the first step surface, continuous rotation of the locking member will cause the valve stem to continuously move in the axial direction until the main sealing structure of the valve body closely abuts against the conical sealing surface, so as to ensure the reliability of the sealed state.

[0012] By arranging the supporting step surface, the supporting stability of the reset elastic member is improved. The reset elastic member is used to provide an elastic force to the locking member and the valve stem in the connected state (screwed connection), so that the arc-shaped sealing surface always has a tendency to approach the conical sealing surface, so as to ensure the sealed state of the inflation valve under low pressure.

[0013] In some embodiments, at least a part of the locking member is arranged in the second cavity section; the valve stem is arranged in the second cavity section and the third cavity section; and the locking member is sleeved on the valve stem to realize the threaded connection.

[0014] In this embodiment, by accurately arranging the positions of the locking member and the valve stem in the mounting cavity, when the locking member rotates relative to the valve body, the valve stem can move relative to the valve body in the first direction, so as to move the arc-shaped sealing surface away from or close to the conical sealing surface, thereby realizing the opening and sealing of the inflation valve.

[0015] In some embodiments, the inflation valve further comprises a first limiting member arranged in the first cavity section, and the first limiting member is used to limit the movement range of the locking member in the first direction; and at least a part of the locking member is arranged between the first limiting member and the first step surface.

[0016] In this embodiment, by the cooperation of the first limiting member and the first step surface, the movement range of the locking member in the first cavity section is limited. By rotating the locking member, the valve stem is driven to move in the first direction, so as to move the arc-shaped sealing surface away from or close to the conical sealing surface, thereby realizing the opening and sealing of the inflation valve. In some embodiments, the inflation valve further comprises a first limiting member arranged in the first cavity section, and the first limiting member is used to limit the movement range of the locking member in the first direction; and at least a part of the locking member is arranged between the first limiting member and the first step surface.

[0017] In some technical solutions, the cavity wall of the first cavity section is provided with a first clamping groove, and at least a part of the first limiting piece is arranged in the first clamping groove.

[0018] In the technical solution, the first clamping groove is used to provide mounting space for the first limiting piece, which is beneficial to improve the mounting precision of the first limiting piece, and can also greatly avoid the first limiting piece from being taken out of the first cavity section.

[0019] In some technical solutions, the inflation valve further comprises: a second limiting piece arranged in the third cavity section, and the second limiting piece is arranged on the side of the valve rod away from the locking piece; the second limiting piece is used to limit the movement range of the valve rod in the first direction.

[0020] In the technical solution, by arranging the second limiting piece, the movement range of the valve rod in the first direction can be limited, so as to avoid the valve rod from being taken out of the third cavity section during movement, and also to avoid the valve rod and the locking piece from being in a state of thread disconnection.

[0021] In some technical solutions, the cavity wall of the third cavity section is provided with a second clamping groove, and at least a part of the second limiting piece is arranged in the second clamping groove.

[0022] In the technical solution, the second clamping groove is used to provide mounting space for the second limiting piece, which is beneficial to improve the mounting precision of the second limiting piece, and can also greatly avoid the second limiting piece from being taken out of the third cavity section.

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

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

[0025] The second aspect of the present application provides an energy accumulator, comprising: an energy accumulator body; and the inflation valve in any of the above technical solutions, which is connected with the energy accumulator body.

[0026] Since the energy accumulator comprises the inflation valve in any of the above technical solutions, it has the beneficial effects of any of the above technical solutions, which will not be repeated here.

[0027] The third aspect of the present application provides an oil-gas suspension cylinder, comprising: a cylinder body; and the inflation valve in any of the above technical solutions, which is connected with the cylinder body.

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

[0029] The additional aspects and advantages of the technical solutions of the present application will become apparent from the following description part or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[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 FIG2 shows a schematic diagram of an inflation valve in an inflation state according to an embodiment of the present invention;

[0032] Figure 3 FIG2 shows a schematic diagram of an inflation valve in a deflated state according to an embodiment of the present invention;

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

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

[0035] Figure 6 A schematic diagram of an accumulator 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 corresponding relationship between the reference numerals and component names is as follows:

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

[0039] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the embodiments of the present invention may also 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] Charging valves are usually used in closed containers such as accumulators or oil and gas suspension cylinders to seal high-pressure gas.

[0042] In the prior art, accumulator charging valves utilize a wire seal and valve core structure. This design, which uses the wire seal as a buffer seal and the valve core as the primary seal, has the following limitations: First, the valve core is prone to bending during high-pressure accumulator deflation; second, after the wire seal is opened (released from the sealed state), the air path typically splits into two, creating numerous leak points. If foreign matter is present in the wire seal, airtightness is severely compromised; and third, high machining precision is required for the valve core and valve sleeve.

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

[0044] The present invention aims to provide an inflation valve, an accumulator, and an oil-gas suspension cylinder, wherein the valve body and valve stem in a sealed state achieve surface contact via an annular seal, eliminating the need for a valve core structure and preventing the valve core from being bent. Because the valve body and valve stem are sealed by surface contact, the sealing effect is better and the reliability is higher than that of a line contact method, and there are fewer leakage points after the sealing state is released. In addition, because the valve body and valve stem achieve surface contact via an annular seal, the machining accuracy 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 sealing gasket and a return spring. This design has the following limitations: First, when the accumulator is deflated at high pressure, the operator needs to press the valve core vertically, exerting a large force to overcome the pressure of the high-pressure gas and the spring, making deflation extremely inconvenient and posing a safety hazard. Second, when the accumulator is at low pressure, it relies primarily on the spring for reset, resulting in poor airtightness and a safety hazard if the spring fails.

[0046] In the technical solution of the present invention, the valve stem is threadedly connected to the locking member. During the process of rotating the locking member relative to the valve body, the valve stem can move relative to the valve body in a first direction, and the arcuate sealing surface moves away from or closer to the conical sealing surface to achieve opening and sealing of the inflation valve. During the process of rotating the locking member in the first rotational direction, the arcuate sealing surface gradually approaches the conical sealing surface, and the annular seal between the two sealing surfaces is squeezed and deformed, filling the gap between the sealing surfaces to achieve surface contact between the valve body and the valve stem. During the process of rotating the locking member in the second rotational direction, the arcuate sealing surface gradually moves away from the conical sealing surface to release the sealing state, and enter the intake state or exhaust state according to actual requirements.

[0047] The inflation valve of the present invention has two high-pressure deflation methods. The first method is that the staff presses the locking nut to drive the arcuate sealing surface of the valve body away from the conical sealing surface, thereby releasing the sealing state of the inflation valve. The second method is that in the process of rotating the locking member along the second rotation direction, the arcuate sealing surface gradually moves away from the conical sealing surface to release the sealing state. In the case that the inflation valve needs to be in the deflated state for a long time, the second high-pressure deflation method can be used, which is convenient and fast and helps to reduce safety hazards. In addition, the valve body and the valve stem are in a sealed state by rotating the locking member, rather than using only the pressure of the reset spring. This design method helps to ensure the airtightness between the valve body and the valve stem in the sealed state, and reduces the safety hazard when the reset spring fails.

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

[0049] An accumulator is a closed container that stores high-pressure gas energy and can release it on demand. It is widely used in hydraulic and pneumatic systems to achieve energy buffering, regulation or emergency supply through the compressibility of gas.

[0050] The oil-gas suspension cylinder is a buffer support device used in the vehicle suspension system. It achieves shock absorption, load bearing and posture adjustment through the synergistic effect of high-pressure gas and hydraulic oil. It is widely used in heavy-duty vehicles (such as engineering vehicles, off-road vehicles, etc.).

[0051] Refer to the following Figures 1 to 7 An air charging valve, an accumulator, and an oil-gas suspension cylinder according to some embodiments of the present invention are described.

[0052] In one embodiment of the present invention, Figure 1 、 Figure 2 and Figure 3 As shown, the inflation valve 1 includes a valve body 10 , a locking member 12 , a valve stem 14 and a reset elastic member 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 in 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 rotation of the locking member 12 relative to the valve body 10, the valve stem 14 is movable relative to the valve body 10 in the first direction a. A resilient member 16 is disposed within the mounting cavity 104 and is sleeved on the valve stem 14. One end of the resilient member 16 is configured to abut against the locking member 12, while the other end of the resilient member 16 abuts against the wall of the mounting cavity 104.

[0054] The mounting cavity 104 has a conical sealing surface 116, the valve stem 14 has an arcuate sealing surface 142, and an annular sealing member 18 is provided on the arcuate sealing surface 142; when the locking member 12 rotates relative to the valve body 10, the arcuate sealing surface 142 moves away from or close to the conical sealing surface 116 to achieve 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. Mounting cavity 104 is used to house or install components such as the locking member 12, the valve stem 14, and the return spring 16. The valve body 10 is used to sealably connect to the container body of a sealed container. The container body of the sealed container is used to store gas.

[0056] It should be noted that the closed container is the accumulator 2 or the oil-gas suspension cylinder 3. The container body of the closed 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 in 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 within the mounting cavity 104 has only one degree of freedom relative to the valve body 10: freedom of movement in the first direction a. The valve body 10 restricts circumferential rotation of the valve stem 14. During rotation of the locking member 12 relative to the valve body 10, the valve stem 14 cannot rotate with the locking member 12 and can only move relative to the valve body 10 in the first direction a.

[0059] It should be noted that the first direction a may 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 resetting elastic member 16 can ensure that the arcuate sealing surface 142 always has a tendency to approach the conical sealing surface 116 before the inflation tool is removed and locked, so as to ensure that the inflation valve 1 is in a sealed state.

[0061] The present invention aims to provide an inflation valve 1, in which, during the process of rotating the locking member 12 along the first rotation direction, the arcuate sealing surface 142 gradually approaches the conical sealing surface 116, and the annular seal 18 between the two sealing surfaces is squeezed 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 process of rotating the locking member 12 along the second rotation direction, the arcuate sealing surface 142 gradually moves away from the conical sealing surface 116 to release the sealing state and enter the intake state or exhaust state according to actual requirements. Surface contact is achieved between the valve body 10 and the valve stem 14 in the sealed state through the annular seal 18. This design method is conducive to greatly improving the sealing effect and has higher reliability.

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

[0063] When sealed, the valve body 10 and valve stem 14 achieve surface contact via the annular seal 18, eliminating the need for a valve core structure and preventing the valve core from bending. Because the valve body 10 and valve stem 14 are sealed via surface contact, the sealing effect is better and more reliable than with line contact, and there are fewer leakage points after the seal is released. Furthermore, because the valve body 10 and valve stem 14 achieve surface contact via the annular seal 18, high machining precision is not required for the valve body 10 and valve stem 14, making them suitable for rapid production.

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

[0065] By rotating the locking member 12 clockwise, the arcuate sealing surface 142 gradually approaches the conical sealing surface 116. The annular seal 18 between the two sealing surfaces is squeezed and deformed, filling the gap between the sealing surfaces to achieve surface contact between the valve body 10 and the valve stem 14. By rotating the locking member 12 counterclockwise, the arcuate sealing surface 142 gradually moves away from the conical sealing surface 116, releasing the sealing state and entering the intake state or exhaust state according to actual requirements.

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

[0067] In some embodiments, the locking member 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 cavity segments. One cavity segment has a circular cross-section, and the locking member 12 is disposed within this cavity segment. The locking member 12 has a circular cross-section. The locking member 12 is rotatable relative to the valve body 10 and movable relative to the valve body 10 along a first direction a.

[0069] The cross-sectional shape of the other cavity segment is any one of an ellipse, triangle, quadrilateral, pentagon, and hexagon. The valve stem 14 is disposed within this cavity segment, and its cross-sectional shape matches that of the cavity segment. With this design, the valve stem 14 cannot rotate with the locking member 12 and can only move relative to the valve body 10 in the first direction a.

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

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

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

[0073] In some embodiments, the portion of the valve stem 14 having the arcuate sealing surface 142 can optionally serve as a primary sealing structure, and the primary sealing structure and the conical sealing surface 116 of the valve body 10 can be in surface contact via a rubber seal.

[0074] The inflation valve 1 is automatically closed by a reset elastic member 16 (such as a reset spring). The reset elastic member 16 makes the arcuate sealing surface 142 always have a tendency to approach the conical sealing surface 116 to ensure that the inflation valve 1 is in a sealed state. The staff can drive the valve stem 14 through the locking nut (a specific form of the locking member 12) and the thread on the valve stem 14, so that the main sealing structure is tightly attached to the matching conical surface (conical sealing surface 116) of the valve body 10 to ensure the reliability of the seal. When deflated, the valve stem 14 is driven to open outward by the locking nut (rotate the locking nut counterclockwise to move the arcuate sealing surface 142 away from the conical sealing surface 116), which overcomes the problem of difficulty in opening the inflation valve 1 under high pressure.

[0075] In some embodiments, the valve stem 14 is optionally provided with a primary sealing structure that is configured to seal against the conical sealing surface 116 of the valve body 10. A return spring (a specific form of the return spring 16) ensures a tight seal at all times. The valve stem 14 is provided with threads that can be threadedly connected to a locking nut. When the locking nut rotates upward counterclockwise and contacts the upper limit retaining spring (a specific form of the first limit member 191), the locking nut stops axial movement (stops moving in the first direction a). Continued rotation of the locking nut then begins to drive the valve stem 14 axially downward (downward in the first direction a), opening the valve core. Conversely, when the locking nut rotates clockwise and contacts the lower limit step (first step surface 114) of the valve body 10, continued rotation of the locking nut causes the valve stem 14 to move upward, tightening the seal between the two sealing surfaces. The lower limit retaining spring (a specific form of the second limit member 193) prevents the valve stem 14 from dislodging from the locking nut.

[0076] In some embodiments, optionally, as Figure 1 、 Figure 2 and Figure 3 As shown, the installation cavity 104 includes a first cavity section 111, a second cavity section 112, and a third cavity section 113. The connecting wall between the first cavity section 111 and the second cavity section 112 is a first step surface 114. The connecting wall between the third cavity section 113 and the second cavity section 112 is a conical sealing surface 116.

[0077] Optionally, the size of the first cavity segment 111 is larger than the size of the second cavity segment 112. When the cross-sectional shape of the first cavity segment 111 is circular and the cross-sectional shape of the second cavity segment 112 is circular, the radial dimension of the first cavity segment 111 is larger than the radial dimension of the second cavity segment 112. When the cross-sectional shape of the first cavity segment 111 is circular and the cross-sectional shape of the second cavity segment 112 is elliptical, triangular, quadrilateral, pentagonal, or hexagonal, 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 section 111 and the second cavity section 112 form a step structure, and the connecting wall surface between the first cavity section 111 and the second cavity section 112 is the first step surface 114 .

[0079] At least a portion of the locking member 12 is disposed within the first cavity 111. The locking member 12 within the first cavity 111 is capable of rotating relative to the valve body 10 and moving relative to the valve body 10 along a first direction a. The first step 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 a locked state (i.e., a sealed state), the locking member 12 is rotated along the first rotation direction. When the locking member 12 touches the first step surface 114, continuing to rotate the locking member 12 will cause the valve stem 14 to continue to move axially until the main sealing structure of the valve body 10 is tightly fitted with the conical sealing surface 116, thereby ensuring 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 a transition surface between the second cavity section 112 and the third cavity section 113 .

[0083] A supporting step surface 115 is defined in the second cavity section 112 , and an end of the resetting elastic member 16 away from the locking member 12 is adapted to abut against the supporting step surface 115 .

[0084] The provision of the support step surface 115 helps to improve the support stability of the reset elastic member 16. The reset elastic member 16 is used to provide elastic force to the locking member 12 and the valve stem 14 in the connected state (threaded connection), so that the arcuate sealing surface 142 always has a tendency to move toward the conical sealing surface 116, thereby ensuring that the inflation valve 1 is in a sealed state under low pressure conditions.

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

[0086] The locking member 12 is partially located in the first cavity section 111 and partially located in the cavity section 112. The locking member 12 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 arranged in the second cavity section 112 and the third cavity section 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 in the first direction a.

[0088] The locking member 12 is sleeved on the valve stem 14 to realize threaded connection.

[0089] It should be noted that the locking member 12 in the second cavity section 112 is sleeved on the valve stem 14 in the second cavity section 112, and the locking member 12 is threaded with the valve stem 14.

[0090] By accurately setting the positions of the locking member 12 and the valve stem 14 in 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 in the first direction a, so that the arc-shaped sealing surface 142 is away from or close to the conical sealing surface 116, thereby realizing the opening and sealing of the inflation valve 1.

[0091] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 3 , the inflation valve 1 further comprises a first limiting member 191. The first limiting member 191 is clamped in the first cavity section 111. The first limiting member 191 is used to limit the movement range of the locking member 12 in the first direction a. At least a part of the locking member 12 is arranged between the first limiting member 191 and the first step surface 114.

[0092] The first step surface 114 is a connecting wall surface between the first cavity section 111 and the second cavity section 112. A part of the locking member 12 is arranged in the first cavity section 111, and the locking member 12 arranged in the first cavity section 111 is between the first limiting member 191 and the first step surface 114.

[0093] Therefore, by the cooperation of the first limiting member 191 and the first step surface 114, the movement range of the locking member 12 in the first cavity section 111 can be limited. By rotating the locking member 12, the valve stem 14 is driven to move in the first direction a, so that the arc-shaped sealing surface 142 is away from or close to the conical sealing surface 116, thereby realizing the opening and sealing of the inflation valve 1.

[0094] As shown in Figure 1 , 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, continuing to rotate the locking member 12 will cause the valve stem 14 to continuously move 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 sealed state.

[0095] like Figure 2 As shown, when the inflation valve 1 is required to enter the inflation state, the locking member 12 is rotated along the second rotation direction, so that the locking member 12 is separated from the first step surface 114 by a certain distance (the locking member 12 is not in contact with the first limit member 191 at this time). Under the elastic force of the reset elastic member 16 and 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. An external high-pressure gas source enters the inflation valve 1, pushing the locking member 12 and the valve stem 14 to move axially together (this process overcomes the elastic force of the reset elastic member 16 and the high-pressure gas in the container body), 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 enter the deflated state, the locking member 12 is rotated along the second rotation direction to separate the locking member 12 from the first step surface 114 by a certain distance (the locking member 12 is not in contact with the first limit member 191 at this time), and the staff presses the locking nut to drive 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, as Figure 3 As shown, when the inflation valve 1 needs to enter the deflation state, the locking member 12 is rotated along 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 continue to move axially until the main sealing structure of the valve body 10 is separated from the conical sealing surface 116, opening the valve core (the inflation valve 1 is in the open state), and the high-pressure gas in the container body flows out of the inflation valve 1 to achieve deflation.

[0098] The inflation valve 1 of the present invention has two high-pressure deflation methods. The first method is that the staff presses the locking nut to drive the arcuate 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. The second method is that in the process of rotating the locking member 12 along the second rotation direction, the arcuate sealing surface 142 gradually moves away from the conical sealing surface 116 to release the sealing state. In the case that the inflation valve 1 needs to be in the deflated state for a long time, the second high-pressure deflation method can be used, which is convenient and fast and helps to reduce safety hazards. In addition, the valve body 10 and the valve stem 14 are in a sealed state by rotating the locking member 12, rather than using only the pressure of the reset spring. This design method helps to ensure the airtightness between the valve body 10 and the valve stem 14 in the sealed state, and reduces the safety hazard when the reset spring fails.

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

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

[0101] When the inflation valve 1 needs to enter a locked state, the locking nut (a specific form of the locking member 12) is rotated clockwise. When the locking nut touches the lower limit step (the first step surface 114), continuing to rotate the locking nut will cause the valve stem 14 to 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 the inflation valve 1 is inflated, the locking nut is rotated counterclockwise to separate the locking nut from the lower limit step by a certain distance (the locking nut is now free from contact with the upper limit retaining spring). Under the elastic force of the return spring (a specific form of the return elastic member 16) and the high-pressure gas within the container body, the main sealing structure of the valve stem 14 is pressed against the tapered sealing surface 116 of the valve body 10, maintaining a constant seal. An external high-pressure gas source enters the inflation valve 1, pushing the locking member 12 and the valve stem 14 to move axially together, opening the valve core (the inflation valve 1 is in the open state), and the external high-pressure gas source enters the container body.

[0103] When the inflation valve 1 needs to be in the deflated state, rotate the locking nut counterclockwise. When the locking nut touches the upper limit retaining spring (a specific form of the first limit member 191), continuing to rotate the locking nut will cause the valve stem 14 to move downward, opening the valve core (the inflation valve 1 is in the open state), and the high-pressure gas in the container body flows out of the inflation valve 1 to achieve deflation.

[0104] In a specific embodiment, the first limiter 191 is an upper limit spring, that is, the first limiter 191 is a spring structure. With this design, the first limiter 191 not only limits the movement range of the locking member 12, but also acts as a buffer to prevent the first limiter 191 from rigidly colliding with the locking member 12.

[0105] In a 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 a locked state, by rotating the locking piece 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 air tightness under low pressure conditions, which is conducive to improving the reliability of the sealing state.

[0107] When the inflation valve 1 is required to be in the deflated state, the valve core is opened by rotating the locking member 12 (the inflation valve 1 is in the open state). Under the action of the high-pressure gas, the valve core opening force is very small, which is easier to operate manually.

[0108] In some embodiments, optionally, a first airflow channel is provided on the locking nut. A second airflow channel is provided on the valve stem 14. The first airflow channel is connected to the second airflow channel. The space between the arcuate sealing surface 142 and the conical sealing surface 116 is connected to the second airflow channel.

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

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

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

[0112] In some embodiments, optionally, a buffer layer is provided in the first slot 192 . The buffer layer can play a buffering role and reduce the degree of wear on the slot wall.

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

[0114] By setting the second limiter 193, the movement range of the valve stem 14 in the first direction a can be limited to prevent the valve stem 14 from falling out of the third cavity section 113 during movement, and to prevent the valve stem 14 from being disengaged from the threaded connection with the locking member 12.

[0115] In a specific embodiment, the second limiter 193 is a lower limiter spring, that is, the second limiter 193 is a retaining spring structure. With this design, the second limiter 193 not only limits the range of movement of the valve stem 14, but also acts as a buffer to prevent the second limiter 193 from rigidly colliding with the valve stem 14.

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

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

[0118] The second slot 194 is used to provide an installation space for the second limiting member 193 , which is beneficial to improving the installation accuracy of the second limiting member 193 and can also largely prevent the second limiting member 193 from falling out of the third cavity section 113 .

[0119] In some embodiments, optionally, a buffer layer is provided in the second slot 194 . The buffer layer can play a buffering role and reduce the degree of wear on the slot wall.

[0120] In some embodiments, optionally, 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 located within the mounting groove 105. The provision of the sealing ring 106 ensures a sealed connection between the valve body 10 and the container body.

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

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

[0124] In the case that both the first portion 101 and the second portion 102 are cylindrical, the radial dimension (such as the diameter) of the first portion 101 is greater than the radial dimension of the second portion 102 .

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

[0126] A sealing groove is arranged on the second stepped surface 103, and a sealing ring 106 is arranged in the sealing groove to realize the sealing connection of the second stepped surface 103 and the container body.

[0127] In some embodiments, the valve body 10 is of a monolithic structure or a split structure.

[0128] In a specific embodiment, the first part 101 and the second part 102 are of a monolithic structure, which has good mechanical properties and high connection strength relative to a post-processing manner, is beneficial to reducing the number of parts, and improves assembly efficiency.

[0129] In a specific embodiment, the first part 101 and the second part 102 are of a split structure. The first part 101 and the second part 102 are detachably connected, which is convenient for workers to disassemble and assemble, and is beneficial to maintenance or replacement.

[0130] In an embodiment of the present application, as shown in Figure 4 , Figure 5 and Figure 6 , the accumulator 2 comprises an accumulator body 20 and the inflation valve 1 in any of the above embodiments. The inflation valve 1 is connected with the accumulator body 20.

[0131] Since the accumulator 2 comprises the inflation 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 arranged on the second stepped surface 103, and a sealing ring 106 is arranged in the sealing groove to realize the sealing connection of the second stepped surface 103 and the accumulator body 20.

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

[0134] In an embodiment of the present application, as shown in Figure 7 , the oil-gas suspension cylinder 3 comprises a cylinder body 30 and the inflation valve 1 in any of the above embodiments. The inflation valve 1 is connected with the cylinder body 30.

[0135] Since the oil-gas suspension cylinder 3 comprises the inflation 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 step surface 103 is used to abut and connect with the cylinder body 30. 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 cylinder body 30.

[0137] In the present invention, 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 "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0138] In the description of the present invention, it should be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0139] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0140] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An inflation valve, characterized in that: include: A valve body (10) having a mounting cavity (104); A locking member (12) is rotatably disposed in the mounting cavity (104), and the locking member (12) is capable of moving relative to the valve body (10) along a first direction; A valve stem (14) is disposed in the mounting cavity (104), the valve stem (14) being threadedly connected to the locking member (12); when the locking member (12) rotates relative to the valve body (10), the valve stem (14) is capable of moving relative to the valve body (10) along the first direction; A reset elastic member (16) is provided in the installation cavity (104), the reset elastic member (16) is sleeved on the valve stem (14), one end of the reset elastic member (16) is used to abut against the locking member (12), and the other end of the reset elastic member (16) is used to abut against the cavity wall of the installation cavity (104); The mounting cavity (104) has a conical sealing surface (116), the valve stem (14) has an arcuate sealing surface (142), and an annular sealing member (18) is provided on the arcuate sealing surface (142); when the locking member (12) rotates relative to the valve body (10), the arcuate sealing surface (142) moves away from or approaches the conical sealing surface (116) to achieve opening and sealing of the inflation valve.

2. The inflation valve according to claim 1, characterized in that The installation cavity (104) comprises a first cavity section (111), a second cavity section (112) and a third cavity section (113) that are connected; The connecting wall surface between the first cavity section (111) and the second cavity section (112) is a first step surface (114); The connecting wall surface 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 in the first cavity section (111), and the first step surface (114) is used to limit the movement range of the locking member (12) in the first direction; A supporting step surface (115) is provided in the second cavity section (112), and an end of the reset elastic member (16) away from the locking member (12) is used to abut against the supporting 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 in the second cavity section (112); The valve stem (14) is disposed in the second cavity section (112) and the third cavity section (113); The locking member (12) is sleeved on the valve stem (14) to achieve threaded connection.

4. The inflation valve according to claim 2, characterized in that Also includes: a first limiting member (191) disposed in the first cavity section (111), the first limiting member (191) being used to limit the movement range 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 step surface (114).

5. The inflation valve according to claim 4, characterized in that A first clamping groove (192) is provided on the cavity wall of the first cavity section (111), and at least a portion of the first position-limiting member (191) is disposed in the first clamping groove (192).

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

7. The inflation valve according to claim 6, characterized in that A second clamping groove (194) is provided on the cavity wall of the third cavity section (113), and at least a portion of the second position-limiting member (193) is disposed in the second clamping groove (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 accumulator, characterized in that: include: accumulator body (20); The charging valve according to any one of claims 1 to 8, connected to the accumulator body (20).

10. A hydro-pneumatic suspension cylinder, characterized in that: include: Cylinder (30); The inflation valve according to any one of claims 1 to 8, connected to the cylinder (30).

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