Gas cylinder

Abstract

The utility model provides a gas cylinder which comprises an inner container, an outer container and a gas cylinder cover. The valve seat is arranged at the bottle opening, a plurality of anti-skid structures are arranged on the outer wall of the valve seat, and the multiple anti-skid structures are distributed in the axial direction of the valve seat at intervals; the winding layer is arranged on the periphery of the inner container and the periphery of the valve seat in a surrounding mode, and the winding layer is arranged on the periphery of the multiple anti-skid structures in a surrounding mode. According to the technical scheme, the problem that in the prior art, the carbon fiber winding difficulty is high can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas cylinders, in particular to a gas cylinder. Background Art

[0002] At present, the air buffer tank of the automobile mainly adopts seamless aluminum liner, but the aluminum liner is heavy. In the prior art, in order to reduce the weight of the buffer tank, a light-weight fully wrapped gas cylinder is usually used as the buffer tank, and the fully wrapped gas cylinder adopts a plastic liner.

[0003] Among them, the fully wrapped gas cylinder needs to wrap carbon fiber around the plastic liner during the processing process. After the carbon fiber is cured, it forms a wrapping layer, which can bear the load. Since the pressure of the automobile air buffer tank is low and the diameter is small, the carbon fiber is very easy to slip during the wrapping process, which increases the difficulty of carbon fiber wrapping, affects the structural strength of the wrapping layer, and further affects the impact resistance and fatigue resistance of the wrapping layer. Utility Model Content

[0004] The utility model provides a gas cylinder to solve the problem of high difficulty in winding carbon fiber in the prior art.

[0005] The utility model provides a gas cylinder, comprising: an inner liner, the inner liner having a bottle mouth; a valve seat, arranged at the bottle mouth, the outer wall of the valve seat being provided with a plurality of anti-skid structures, the plurality of anti-skid structures being distributed at intervals along the axial direction of the valve seat; a winding layer, the winding layer being arranged around the outer periphery of the inner liner and the valve seat, and the winding layer being arranged around the outer periphery of the plurality of anti-skid structures.

[0006] Furthermore, the valve seat includes a straight segment, a connecting portion is provided on the straight segment, the straight segment is arranged in the bottle mouth, the connecting portion is an annular structure, the connecting portion is annularly arranged on the outer periphery of the straight segment, the connecting portion extends radially along the valve seat, one side of the connecting portion abuts against the inner liner, and the other side of the connecting portion abuts against the winding layer, and the anti-slip structure includes an annular protrusion, the annular protrusion is annularly arranged on the outer periphery of the connecting portion, and the annular protrusion extends radially along the valve seat.

[0007] Furthermore, the anti-skid structure includes a plurality of anti-skid protrusions, and the plurality of anti-skid protrusions are arranged in an annular manner at intervals on the outer periphery of the valve seat.

[0008] Furthermore, a first limiting structure is provided between the bottle mouth and the valve seat to limit the valve seat axially and radially.

[0009] Furthermore, the first limiting structure is composed of a plurality of limiting grooves and a plurality of limiting protrusions, the plurality of limiting grooves are arranged at the bottle mouth or the valve seat, the plurality of limiting protrusions and the plurality of limiting grooves are arranged at the bottle mouth or the valve seat opposite to the plurality of limiting grooves, the limiting grooves are arranged in a ring shape, and the plurality of limiting grooves are distributed at intervals along the axial direction.

[0010] Furthermore, a second limiting structure is provided between the valve seat and the winding layer to limit the winding layer in the axial direction.

[0011] Furthermore, a protruding structure is provided on the valve seat. The protruding structure is arranged in an annular shape and extends radially along the valve seat. The end of the winding layer abuts against the protruding structure, and the protruding structure forms a second limiting structure.

[0012] Furthermore, the connection between the straight line segment and the connecting part has an arc structure, the arc structure is arranged on a side of the connecting part away from the inner tank, the center of the arc structure is arranged away from the center line of the valve seat, and the winding layer extends to the arc structure.

[0013] Furthermore, a sealing structure is provided between the valve seat and the inner container, and the sealing structure is arranged between the anti-slip structure and the bottle mouth.

[0014] Furthermore, the inner tank and the valve seat are assembled separately.

[0015] By applying the technical solution of the utility model, the valve seat is arranged at the bottle mouth of the inner liner, and a plurality of anti-skid structures are arranged on the outer wall of the valve seat. Carbon fiber is wound on the valve seat and the inner liner, and a winding layer is formed after the carbon fiber is solidified. With such arrangement, during the winding process of the carbon fiber, the anti-skid structure can increase the friction between the carbon fiber and the valve seat, and prevent the carbon fiber from slipping during the winding process, thereby reducing the difficulty of the winding process of the gas cylinder and ensuring the precision and accuracy of the winding process. At the same time, the friction between the winding layer and the valve seat can be increased to avoid the misalignment of the winding layer, thereby ensuring the structural strength of the winding layer and improving the impact resistance and fatigue resistance of the winding layer. At the same time, the anti-skid structure can transfer the force of the end of the gas cylinder to the winding layer, and prevent stress concentration when the end of the gas cylinder is hit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the structure of a gas cylinder provided according to the first embodiment of the utility model is shown;

[0018] Figure 2 Shows Figure 1 A partial enlarged view of point A in the middle.

[0019] The above drawings include the following reference numerals:

[0020] 10. Inner liner;

[0021] 11. Bottle mouth;

[0022] 20. Valve seat;

[0023] 21. Anti-slip structure; 22. Position limiting protrusion; 23. Protrusion structure; 24. Connecting part; 25. Straight line segment; 26. Arc structure;

[0024] 30. Wrapping layer;

[0025] 40. Sealing structure. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] like Figure 1 and Figure 2 As shown, the first embodiment of the present application provides a gas cylinder, which includes an inner liner 10, a valve seat 20 and a winding layer 30. The inner liner 10 has a bottle mouth 11. The valve seat 20 is arranged at the bottle mouth 11, and the outer wall of the valve seat 20 is provided with a plurality of anti-skid structures 21, and the plurality of anti-skid structures 21 are distributed at intervals along the axial direction of the valve seat 20. The winding layer 30 is arranged around the outer periphery of the inner liner 10 and the valve seat 20, and the winding layer 30 is arranged around the outer periphery of the plurality of anti-skid structures 21.

[0028] By applying the technical solution of the present application, the valve seat 20 is arranged at the bottle mouth 11 of the inner liner 10, and a plurality of anti-skid structures 21 are arranged on the outer wall of the valve seat 20. Carbon fibers are wound around the valve seat 20 and the inner liner 10, and a winding layer 30 is formed after the carbon fibers are cured. With such arrangement, during the winding process of the carbon fibers, the anti-skid structure 21 can increase the friction between the carbon fibers and the valve seat 20, and prevent the carbon fibers from slipping during the winding process, thereby reducing the difficulty of the winding process of the gas cylinder and ensuring the precision and accuracy of the winding process. At the same time, the friction between the winding layer 30 and the valve seat 20 can be increased, and the misalignment of the winding layer 30 can be avoided, thereby ensuring the structural strength of the winding layer 30 and improving the impact resistance and fatigue resistance of the winding layer 30. At the same time, the anti-skid structure 21 can transfer the force of the end of the gas cylinder to the winding layer 30, and prevent the stress concentration when the end of the gas cylinder is hit.

[0029] The inner liner 10 is made of plastic and has excellent properties such as light weight, high strength and corrosion resistance.

[0030] Furthermore, the carbon fiber should be continuous and untwisted, and mixed fibers are not suitable. The valve seat 20 is made of metal material, and the material of the valve seat 20 needs to be compatible with hydrogen, and aluminum alloy is preferred. The material of the liner 10 needs to have a certain rigidity and also should have a relatively low hydrogen permeability. Commonly used materials include nylon PA6, PA11, PA12, etc., among which PA6 can be used. For gas cylinders with lower pressures, polyethylene is also often used as the material of the liner 10, such as HDPE. In order to ensure that the material of the liner 10 has a certain rigidity and a low hydrogen permeability, the existing materials can also be modified during material selection.

[0031] The outer wall of the valve seat 20 may be provided with three anti-slip structures 21 .

[0032] Specifically, the valve seat 20 includes a straight segment 25, a connecting portion 24 is provided on the straight segment 25, the straight segment 25 is arranged in the bottle mouth 11, the connecting portion 24 is an annular structure, the connecting portion 24 is annularly arranged on the outer periphery of the straight segment, the connecting portion 24 extends radially along the valve seat 20, one side of the connecting portion 24 abuts against the inner liner 10, and the other side of the connecting portion 24 abuts against the winding layer 30.

[0033] The anti-skid structure 21 includes an annular protrusion, which is annularly arranged on the outer periphery of the connecting portion 24 and extends radially along the valve seat 20. Such an arrangement facilitates the processing of the anti-skid structure 21, and ensures the friction between the valve seat 20 and the winding layer 30, thereby preventing the carbon fiber from slipping during the production of the gas cylinder, thereby preventing the winding layer 30 from slipping.

[0034] The anti-slip structure 21 can be processed by various molding methods.

[0035] Optionally, a beam of radiation is used to irradiate the metal surface of the valve seat 20, thereby melting the irradiated area and forming a micro-molten pool; then a high-energy pulse beam of radiation is used to rapidly vaporize and explode the metal inside the micro-molten pool; the metal in the micro-molten pool rapidly cools and solidifies upon encountering air, thereby forming an oblique upward hook at the edge of the pit.

[0036] Optionally, a plurality of annular protrusions may be machined during machining.

[0037] Furthermore, the staff can select the structure of the annular protrusion according to the needs, which can be an arc structure, a square structure, or a conical structure.

[0038] Furthermore, a first limiting structure is provided between the bottle mouth 11 and the valve seat 20 to limit the valve seat 20 axially and radially. This arrangement facilitates the installation of the valve seat 20 and can prevent the valve seat 20 from being misplaced during operation, thereby ensuring the accuracy of the valve seat 20 during operation.

[0039] The first limiting structure is formed by a plurality of limiting grooves and a plurality of limiting protrusions 22, the plurality of limiting grooves are arranged at the bottle mouth 11 or the valve seat 20, the plurality of limiting protrusions 22 are arranged at the bottle mouth 11 or the valve seat 20 in correspondence with the plurality of limiting grooves, the limiting grooves are arranged in an annular shape, and the plurality of limiting grooves are spaced apart along the axial direction. Such an arrangement facilitates the processing of the inner liner 10 and the valve seat 20.

[0040] Specifically, a plurality of limiting grooves are provided at the bottle mouth 11, the limiting grooves are arranged in an annular manner, and the plurality of limiting grooves are spaced apart along the axial direction. The outer wall of the valve seat 20 is provided with a plurality of limiting protrusions 22, the limiting protrusions 22 are arranged in an annular manner, and the plurality of limiting protrusions 22 are spaced apart along the axial direction. The plurality of limiting protrusions 22 are arranged one by one with the plurality of limiting grooves, and the structures of the limiting protrusions 22 and the corresponding limiting grooves are adapted, and the limiting protrusions 22 are located in the corresponding limiting grooves, and the plurality of limiting grooves cooperate with the plurality of limiting protrusions 22 to form a first limiting structure. Among them, the limiting protrusions 22 are arranged on the straight section 25 of the valve seat 20, and the limiting protrusions 22 are arranged on the side of the connecting portion 24 close to the inner liner 10.

[0041] In this way, the limiting protrusion 22 is arranged correspondingly to the limiting groove, and the valve seat 20 can be quickly aligned during the installation process, which is convenient for positioning the valve seat 20, preventing the valve seat 20 from being greatly offset and misaligned during the installation process, improving the assembly efficiency of the valve seat 20, and at the same time improving the accuracy and stability of the assembly. Among them, the first limiting structure can axially limit the valve seat 20 to prevent the valve seat 20 from excessively moving in the axial direction. At the same time, when the limiting protrusion 22 is installed in the limiting groove, the position of the valve seat 20 can be fixed in the radial direction to ensure the coaxiality of the valve seat 20 and the inner liner 10, and avoid the valve seat 20 from being greatly offset, thereby avoiding the gap between the valve seat 20 and the inner liner 10, and then ensuring the sealing between the valve seat 20 and the inner liner 10.

[0042] Furthermore, the staff can select the structure of the limiting protrusion 22 and the limiting groove according to needs, which can be conical, square, arc or trapezoidal, and the staff can select the size and matching accuracy of the limiting protrusion 22 and the limiting groove according to needs, so that the gas cylinder can adapt to different application scenarios and requirements.

[0043] Optionally, in other embodiments, a plurality of limiting protrusions are provided at the bottle mouth 11, the limiting protrusions are arranged in an annular manner, and the plurality of limiting protrusions are spaced apart along the axial direction, and a plurality of limiting grooves are provided on the outer wall of the valve seat 20, the limiting grooves are arranged in an annular manner, and the plurality of limiting grooves are spaced apart along the axial direction, and the plurality of limiting grooves are arranged one-to-one with the plurality of limiting protrusions, and the structures of the limiting grooves and the corresponding limiting protrusions are adapted, and the limiting protrusions are located in the corresponding limiting grooves, and the plurality of limiting protrusions cooperate with the plurality of limiting grooves to form a first limiting structure. Among them, the limiting groove is provided on the straight section 25 of the valve seat 20, and the limiting groove is provided on the side of the connecting portion 24 close to the inner liner 10.

[0044] In this way, the limiting groove and the limiting protrusion are set correspondingly, and the valve seat 20 can be quickly aligned during the installation process, which is convenient for positioning the valve seat 20, preventing the valve seat 20 from being greatly offset and misaligned during the installation process, improving the assembly efficiency of the valve seat 20, and at the same time improving the accuracy and stability of the assembly. Among them, the first limiting structure can axially limit the valve seat 20 to prevent the valve seat 20 from excessively moving in the axial direction. At the same time, when the limiting groove is installed in the limiting protrusion, the position of the valve seat 20 can be fixed in the radial direction to ensure the coaxiality of the valve seat 20 and the inner liner 10, and avoid the valve seat 20 from being greatly offset, thereby avoiding the gap between the valve seat 20 and the inner liner 10, and then ensuring the sealing between the valve seat 20 and the inner liner 10.

[0045] There is a second limiting structure between the valve seat 20 and the winding layer 30 to axially limit the winding layer 30. This arrangement can prevent the winding layer 30 from being displaced during operation, thereby ensuring the protective effect of the winding layer 30 on the liner 10 and preventing the gas cylinder from being damaged during operation.

[0046] Specifically, a protruding structure 23 is provided on the valve seat 20, the protruding structure 23 is arranged in an annular shape, and the protruding structure 23 extends along the radial direction of the valve seat 20. The end of the winding layer 30 abuts against the protruding structure 23, and the protruding structure 23 forms a second limiting structure. With such a configuration, the structure is simple and convenient for processing the valve seat 20. At the same time, the protruding structure 23 can increase the contact area between the winding layer 30 and the valve seat 20, so that the supporting and stabilizing effect of the winding layer 30 on the valve seat 20 can be better exerted, and the displacement of the valve seat 20 can be effectively limited.

[0047] Among them, in the present application, the protruding structure 23 is arranged to be inclined in a direction away from the connecting portion 24. Such an arrangement further reduces the difficulty of winding the carbon fiber.

[0048] Furthermore, the connection between the straight segment 25 and the connecting portion 24 has an arc structure 26, which is arranged on the side of the connecting portion 24 away from the inner liner 10, and the center of the arc structure 26 is arranged away from the center line of the valve seat 20, and the winding layer 30 extends to the arc structure 26. Such an arrangement facilitates the winding of carbon fibers on the outer sides of the valve seat 20 and the inner liner 10. At the same time, the arc structure 26 between the straight segment 25 and the connecting portion 24 can further increase the contact area between the winding layer 30 and the valve seat 20, thereby facilitating the winding of carbon fibers and further reducing the difficulty of winding carbon fibers.

[0049] Specifically, the raised structure 23 has a first side edge and a second side edge. The first side edge is arranged away from the inner liner 10, and the second side edge is arranged close to the inner liner 10. The first side plate is arranged radially parallel to the valve seat 20, and the second side edge is arranged inclined in a direction away from the connecting portion 24, and the second side edge is smoothly connected to the arc structure 26. Such an arrangement facilitates the processing of the valve seat 20 and further facilitates the winding of carbon fiber.

[0050] There is a sealing structure 40 between the valve seat 20 and the inner liner 10, and the sealing structure 40 is arranged between the anti-slip structure 21 and the bottle mouth 11. Such an arrangement can better achieve the sealing of the gas cylinder and prevent gas leakage from the gas cylinder.

[0051] Specifically, in the present application, the sealing structure 40 is a sealing ring, and a placement groove is provided on one side of the inner liner 10 close to the valve seat 20. The placement groove is arranged in an annular shape, and the sealing ring is placed in the placement groove. Such an arrangement facilitates the assembly of the sealing ring, has a simple structure, and is easy to operate.

[0052] Specifically, the bottle mouth 11 is arranged below the shoulder of the bottle body of the inner liner 10, the placement groove is arranged on the shoulder of the inner liner 10, and the bottom surface of the placement groove is arranged parallel to the connecting part 24 of the valve seat 20. Such a setting can ensure that the sealing ring generates uniform pressure during operation and effectively fills the gap between the valve seat 20 and the inner liner 10.

[0053] The inner liner 10 and the valve seat 20 are assembled separately. This arrangement facilitates the assembly of the inner liner 10 and the valve seat 20, and can avoid the defect of inconsistent shrinkage caused by one-piece injection molding, thereby ensuring the sealing of the connection between the inner liner 10 and the valve seat 20.

[0054] Furthermore, in order to reduce the permeability of hydrogen, a coating can be sprayed on the inner wall of the liner 10. The coating material can be PVDF (polyvinylidene chloride), PVDC polyvinylidene chloride, EVOH (ethylene-vinyl alcohol copolymer), etc., preferably EVOH (ethylene-vinyl alcohol copolymer). The inner wall can also be fluorinated or sulfonated.

[0055] Embodiment 2 of the present application provides a gas cylinder, which is different from Embodiment 1 in that the anti-skid structure 21 includes a plurality of anti-skid protrusions, which are arranged in an annular manner at intervals on the periphery of the valve seat 20. The anti-skid protrusions are dot-shaped structures. Such an arrangement can increase the friction between the valve seat 20 and the winding layer 30, thereby preventing the carbon fiber from slipping during the production of the gas cylinder, thereby preventing the winding layer 30 from slipping. In addition, the above structure is adopted to facilitate the processing of the anti-skid structure 21 and the operation is convenient.

[0056] The technical process for manufacturing the gas cylinder mainly includes the steps of preparation before injection molding, injection molding of the inner liner 10, welding of the inner liner 10, fixing and pressing of the inner liner 10, carbon fiber winding and curing.

[0057] In order to ensure the quality of the injection molding of the liner 10, several more injection ports can be opened on the injection mold, and a gas-assisted process can be used to maintain the pressure.

[0058] When the inner liner 10 is injected, only half of the inner liner 10 is injected. The injection molding process of the inner liner 10 mainly includes the following steps:

[0059] 1. Material selection: Select materials that meet the requirements of injection molding and products;

[0060] 2. Raw material pretreatment: use an oven to dry the materials;

[0061] 3. Pretreatment of injection molding system and injection mold: Pretreatment mainly involves preheating to prevent the material from precooling and solidifying during the injection molding process, which may lead to defects such as material shortage.

[0062] 4. Plasticization: heating the non-metallic material to a molten state;

[0063] 5. Injection: Inject the molten non-metallic material into the preheated mold;

[0064] 6. Maintaining pressure: Maintaining pressure through uniform injection or through gas-assisted process;

[0065] 7. Cooling and forming;

[0066] 8. Demoulding.

[0067] After the injection molding of the inner liner 10 is completed, two halves of the inner liner 10 of the same size are welded, and ultrasonic welding, hot air welding, hot plate welding, etc. can be used.

[0068] After the inner liner 10 is welded, the inner liner 10 is fixed on a winding machine. In order to prevent the plastic inner liner 10 from collapsing during the winding process, the plastic inner liner 10 needs to be in a pressurized state during the winding process.

[0069] Carbon fiber winding mainly includes the following steps:

[0070] 1. Glue solution preparation: Mix epoxy resin and curing agent according to the ratio recommended by the manufacturer and stir evenly;

[0071] 2. Carbon fiber winding: The inner liner 10 is wound on a CNC winding machine according to a pre-set winding program. The winding tension is controlled by an electronic tension control device. The winding tension decreases as the number of winding layers 30 increases. The glue content of the carbon fiber is controlled by a process method.

[0072] In order to protect the carbon fiber winding layer 30 , a glass fiber winding layer 30 may be added outside the carbon fiber winding layer 30 .

[0073] During the curing process, the inner liner 10 wrapped with carbon fibers is cured in a curing furnace according to a pre-programmed curing program.

[0074] Furthermore, the gas cylinder provided in the present application is suitable for automobiles, that is, the gas cylinder provided in the present application can be used as an air buffer tank in an automobile.

[0075] The gas cylinder provided in the present application has the advantages of light weight, strong impact resistance and high fatigue resistance, so it is easy to install in the car, reducing the load of the car, and at the same time can increase the service life of the gas cylinder and avoid repeated maintenance and replacement of the gas cylinder. In addition, the wrapping layer 30 can bear the impact force to prevent the gas cylinder from being damaged due to impact.

[0076] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0077] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0078] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0079] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0080] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0081] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A gas cylinder, characterized in that: include: An inner liner (10), wherein the inner liner (10) has a bottle mouth (11); A valve seat (20) is arranged at the bottle mouth (11), and the outer wall of the valve seat (20) is provided with a plurality of anti-slip structures (21), and the plurality of anti-slip structures (21) are distributed at intervals along the axial direction of the valve seat (20); A winding layer (30), wherein the winding layer (30) is arranged around the outer periphery of the inner container (10) and the valve seat (20), and the winding layer (30) is arranged around the outer periphery of the plurality of anti-slip structures (21).

2. The gas cylinder according to claim 1, characterized in that: The valve seat (20) comprises a straight segment (25), a connecting portion (24) is arranged on the straight segment (25), the straight segment (25) is arranged in the bottle mouth (11), the connecting portion (24) is an annular structure, the connecting portion (24) is arranged in an annular shape on the outer periphery of the straight segment, the connecting portion (24) extends radially along the valve seat (20), one side of the connecting portion (24) abuts against the inner liner (10), and the other side of the connecting portion (24) abuts against the winding layer (30), and the anti-slip structure (21) comprises an annular protrusion, the annular protrusion is arranged in an annular shape on the outer periphery of the connecting portion (24), and the annular protrusion extends radially along the valve seat (20).

3. The gas cylinder according to claim 1, characterized in that: The anti-slip structure (21) comprises a plurality of anti-slip protrusions, and the plurality of anti-slip protrusions are arranged in an annular manner at intervals on the outer periphery of the valve seat (20).

4. The gas cylinder according to claim 1, characterized in that: A first limiting structure is provided between the bottle mouth (11) and the valve seat (20) to limit the valve seat (20) in an axial direction and in a radial direction.

5. The gas cylinder according to claim 4, characterized in that: The first limiting structure is composed of a plurality of limiting grooves and a plurality of limiting protrusions (22), wherein the plurality of limiting grooves are arranged at the bottle mouth (11) or the valve seat (20), and the plurality of limiting protrusions (22) are arranged at the bottle mouth (11) or the valve seat (20) opposite to the plurality of limiting grooves, and the plurality of limiting grooves are arranged in an annular shape and are spaced apart along the axial direction.

6. The gas cylinder according to claim 1, characterized in that: A second limiting structure is provided between the valve seat (20) and the winding layer (30) to limit the axial position of the winding layer (30).

7. The gas cylinder according to claim 6, characterized in that The valve seat (20) is provided with a protruding structure (23), the protruding structure (23) is arranged in an annular shape, the protruding structure (23) extends radially along the valve seat (20), the end of the winding layer (30) abuts against the protruding structure (23), and the protruding structure (23) forms the second limiting structure.

8. The gas cylinder according to claim 2, characterized in that: The connection between the straight line segment (25) and the connecting portion (24) comprises an arc structure (26), the arc structure (26) is arranged on a side of the connecting portion (24) away from the inner liner (10), the center of the arc structure (26) is arranged away from the center line of the valve seat (20), and the winding layer (30) extends to the arc structure (26).

9. The gas cylinder according to claim 1, characterized in that: A sealing structure (40) is provided between the valve seat (20) and the inner container (10), and the sealing structure (40) is arranged between the anti-slip structure (21) and the bottle mouth (11).

10. The gas cylinder according to claim 1, characterized in that The inner container (10) and the valve seat (20) are assembled in separate parts.

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