Designable infinite-rigidity arc-shaped composite material gas cylinder

Abstract

The invention discloses a designable infinite rigidity arc-shaped composite material gas cylinder which comprises a cylinder body, a protective sleeve and a valve sleeve, the cylinder body comprises a composite material inner container, an outer layer is arranged outside the composite material inner container, the cylinder body is installed in the protective sleeve, and a damping strip connected with the protective sleeve is arranged on the outer wall of the cylinder body; a plurality of buffer seats are arranged on the outer wall of the bottle body, first buffer blocks are slidably connected into the buffer seats, and first guide rods are arranged on the inner walls of the buffer seats. The arc-shaped gas cylinder has the beneficial effects that the composite material inner container is made of composite plastic, the flame-retardant fiber layer is wound on the outer layer of the composite material inner container, the composite material inner container can be made into different arc-shaped composite material inner containers according to the use space, then different arc-shaped gas cylinders can be made, the arc-shaped gas cylinders can break through the effect that a straight gas cylinder tends to be straight and round in the process of being subjected to internal pressure, and the service life of the arc-shaped gas cylinders is prolonged. When the gas cylinder is bumped in a vehicle, bumping force is transmitted to the damping strips, and the damping strips can weaken the bumping force of the vehicle to the cylinder body.

Description

Technical Field

[0001] The invention relates to the technical field of composite material gas cylinders, and in particular to a designable infinite rigidity arc-shaped composite material gas cylinder. Background Art

[0002] A gas cylinder is a gas storage device placed in a vehicle to provide the vehicle with liquefied natural gas energy. A composite material gas cylinder adopts a fiber full winding molding process. Generally, it is composed of a gas cylinder liner and a winding layer, wherein the liner is made of plastic, and the winding layer is made of fiber and impregnating resin. The fiber material can be glass fiber, aramid fiber, carbon fiber and other reinforcing materials, and the impregnating resin can be epoxy resin, modified epoxy resin, or unsaturated resin system with added curing agent and accelerator. After being impregnated with the resin, the fiber is wound and cured on the surface of the liner according to a certain winding line.

[0003] For example, a carbon fiber resin composite gas cylinder with application number CN215061245U and announcement date 2021.12.07 includes an outer shell, an inner shell contained in the inner shell, and a bottle mouth is fixedly installed on the top of the inner shell, an exhaust cavity is opened in the bottle mouth, and a fixed plate is connected and installed in the exhaust cavity, a first spring is fixedly installed on the top of the fixed plate, and a sealing plate is fixedly installed on the top of the first spring, a groove is opened at the bottom of the outer shell, and a plurality of second springs are fixedly installed in the groove, and a bottom plate is fixedly installed at the bottom of the second spring.

[0004] As mentioned above and in the prior art, since the composite gas cylinder is used in a vehicle, the vehicle will experience bumps and vibrations during driving, and these vibrations will be directly transmitted to the gas cylinder, which will reduce the service life of the gas cylinder, and if the gas cylinder is squeezed, it is easy to deform. Therefore, it is urgent to design a designable infinite stiffness arc composite gas cylinder to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a designable infinite rigidity arc-shaped composite material gas cylinder to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A designable infinite rigidity arc-shaped composite gas cylinder comprises a bottle body, a protective sleeve and a valve sleeve, wherein the bottle body comprises a composite material liner, and an outer layer is arranged on the outside of the composite material liner, the bottle body is installed inside the protective sleeve, and a shock-absorbing strip connected to the protective sleeve is arranged on the outer wall of the bottle body, a plurality of buffer seats are arranged on the outer wall of the bottle body, and a buffer block is slidably connected to the inside of the buffer seat, a guide rod is arranged on the inner wall of the buffer seat, and the buffer block is slidably sleeved on the outside of the guide rod, a buffer spring connected to the buffer block is arranged on the inner wall of the buffer seat, and the buffer spring is sleeved on the outside of the guide rod, and the outer wall of one side of the buffer block is rotated by a rotating shaft. A rotating rod is movably connected, a plurality of rotating seats are arranged on the inner wall of the protective sleeve, and the other end of the rotating rod away from the buffer block one is rotatably connected to the inside of the rotating seat through a rotating shaft, a buffer cavity is opened inside the buffer seat, and a plurality of extrusion blocks are arranged on the inner wall of the protective sleeve, the extrusion block is inserted into the inside of the buffer cavity, a buffer block 2 is slidably connected to the inside of the buffer cavity, and a guide rod 2 is arranged on the inner wall of the buffer cavity, the buffer block 2 is slidably sleeved on the outside of the guide rod 2, and a buffer spring 2 connected to the buffer block 2 is arranged on the inner wall of the buffer cavity, and a buffer spring 3 is arranged on the outer wall of the two buffer blocks 2, and the buffer spring 2 and the buffer spring 3 are both sleeved on the outside of the guide rod 2.

[0008] Furthermore, an inner auxiliary seat is arranged on the outside of the bottle body, and an outer auxiliary seat is arranged on the inner wall of the protective sleeve.

[0009] Furthermore, a guide sleeve is provided on the outer wall of the inner auxiliary seat, and the guide sleeve is inserted into the inner part of the outer auxiliary seat.

[0010] Furthermore, spring grooves are provided on the inner walls of the inner auxiliary seat and the outer auxiliary seat, and auxiliary springs are provided on the inner walls of the two spring grooves facing each other.

[0011] Furthermore, the outer layer includes a reinforcement layer, a flame retardant fiber layer and a fire resistant resin layer in sequence from the inside to the outside, and the reinforcement layer is arranged on the outer wall of the composite material inner liner.

[0012] Furthermore, the flame retardant fiber layer is wound on the outer wall of the reinforcement layer, and the fire-resistant resin layer is arranged on the outer wall of the flame retardant fiber layer.

[0013] Furthermore, the flame retardant fiber layer includes fiber winding layer one, fiber winding layer two and fiber winding layer three, and fiber winding layer one is wound on the outer wall of the reinforcing layer, the fiber winding layer two is wound on the outside of fiber winding layer one, and fiber winding layer three is wound on the outside of fiber winding layer two.

[0014] Furthermore, the winding angle of the fiber winding layer one is 2-10°, the winding angle of the fiber winding layer two is 25-35°, and the winding angle of the fiber winding layer three is 90°.

[0015] Furthermore, an extension tube is provided at one end of the composite material inner liner, a connecting groove is provided inside the valve sleeve, and the extension tube is inserted into the connecting groove, and a sealing gasket and a sealing ring connected to the extension tube are respectively provided on the inner wall of the connecting groove.

[0016] Furthermore, one end of the valve sleeve is located between the composite material inner liner and the outer layer, and a valve body is arranged inside the valve sleeve.

[0017] In the above technical scheme, the present invention provides a designable infinite stiffness arc-shaped composite gas cylinder, (1) by arranging a composite material inner liner, a flame-retardant fiber layer, a protective sleeve, a buffer seat, a buffer block 1, a guide rod 1, a buffer spring 1, a rotating rod, a rotating seat, a buffer cavity, an extrusion block, a guide rod 2, a buffer block 2, a buffer spring 2 and a buffer spring 3, the composite material inner liner is made of composite plastic, and the outer layer is wrapped with a flame-retardant fiber layer. The composite material inner liner can be made into composite material inner liners of different arcs according to the use space, and then can be made into different arc-shaped gas cylinders, and the arc-shaped gas cylinder can break through the effect of the straight cylinder gas cylinder tending to be straight and round during the internal pressure process. When the gas cylinder is bumped in the vehicle, the bumping force is transmitted to the shock-absorbing strip. The shock-absorbing strip can reduce the bumping force of the vehicle on the bottle body, and can play a role in shock absorption and protection of the bottle body. It can prevent the bottle body from being bumped for a long time, which will shorten the service life. When the gas cylinder is squeezed, most of the squeezing force will be transmitted to the rotating seat, the squeezing block and the external auxiliary seat through the protective cover. The rotating seat will push the rotating rod to rotate, and the rotating rod will drive the buffer block to squeeze the buffer spring one, the squeezing block will squeeze the buffer block two, the buffer block two will squeeze the buffer spring two and stretch the buffer spring three, and the buffer spring one, the buffer spring two and the buffer spring three can squeeze the protective cover. The force can be buffered to prevent the bottle body from being squeezed and deformed; (2) by providing the inner auxiliary seat, the outer auxiliary seat, the guide sleeve, the spring groove and the auxiliary spring, after the protective sleeve is subjected to the extrusion force, a small part of the extrusion force is transmitted to the outer auxiliary seat and the auxiliary spring, and the elastic force of the auxiliary spring can absorb and buffer the extrusion force, and cooperate with the buffer seat to better protect the composite material liner; (3) by providing the outer layer, the reinforcement layer, the flame retardant fiber layer, the fire-resistant resin layer, the fiber winding layer one, the fiber winding layer two and the fiber winding layer three, the reinforcement layer can increase the strength of the composite material liner, the flame retardant fiber layer is divided into the fiber winding layer one, the fiber winding layer two The three windings of the fiber winding layer one and the fiber winding layer three on the outside of the composite material inner liner not only improve the fire resistance of the bottle body, but also improve the pressure resistance and wear resistance of the bottle body. The fiber winding layer one, the fiber winding layer two and the fiber winding layer three are all made of basalt fiber, which can effectively enhance the fire resistance of the composite material gas cylinder and ensure that the composite material gas cylinder will not fail in the event of a fire, thereby improving safety. (4) Through the valve sleeve, extension pipe, connecting groove, sealing gasket, sealing ring and valve body, the extension pipe is inserted into the inside of the valve sleeve, and the sealing gasket and sealing ring are arranged inside the valve sleeve, which can increase the sealing between the valve sleeve and the extension pipe to avoid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a designable infinite stiffness arc-shaped composite material gas cylinder according to the present invention.

[0020] Figure 2 A schematic diagram of the internal cross-sectional structure of an embodiment of a designable infinite stiffness arc-shaped composite material gas cylinder of the present invention is provided.

[0021] Figure 3 A schematic diagram of the internal front view structure of an embodiment of a designable infinite stiffness arc-shaped composite material gas cylinder of the present invention.

[0022] Figure 4 A schematic diagram of the structure of a buffer seat provided for an embodiment of a designable infinite rigidity arc-shaped composite material gas cylinder of the present invention.

[0023] Figure 5 A schematic diagram of the auxiliary seat structure provided for an embodiment of a designable infinite rigidity arc-shaped composite material gas cylinder of the present invention.

[0024] Figure 6 A schematic diagram of the outer layer structure of an embodiment of a designable infinite stiffness arc-shaped composite gas cylinder of the present invention.

[0025] Figure 7 A schematic diagram of the flame retardant fiber layer structure provided for an embodiment of a designable infinite stiffness arc-shaped composite gas cylinder of the present invention.

[0026] Figure 8 A schematic diagram of a valve sleeve structure provided for an embodiment of a designable infinite stiffness arc-shaped composite material gas cylinder of the present invention.

[0027] Description of reference numerals:

[0028] 1. Bottle body; 2. Protective cover; 3. Buffer seat; 4. Buffer block 1; 5. Guide rod 1; 6. Buffer spring 1; 7. Rotating rod; 8. Rotating seat; 9. Buffer cavity; 10. Extrusion block; 11. Guide rod 2; 12. Buffer block 2; 13. Buffer spring 2; 14. Buffer spring 3; 15. Inner auxiliary seat; 16. Outer auxiliary seat; 17. Guide sleeve; 18. Spring groove; 19. Auxiliary spring; 20. Composite material liner; 21. Outer layer; 22. Reinforcement layer; 23. Flame retardant fiber layer; 24. Refractory resin layer; 25. Valve sleeve; 26. Extension tube; 27. Connecting groove; 28. Sealing pad; 29. ​​Sealing ring; 30. Valve body; 31. Fiber winding layer 1; 32. Fiber winding layer 2; 33. Fiber winding layer 3; 34. Shock-absorbing strip. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 1-8 As shown, an embodiment of the present invention provides a designable infinite rigidity arc-shaped composite gas cylinder, comprising a bottle body 1, a protective sleeve 2 and a valve sleeve 25, the bottle body 1 comprising a composite material liner 20, and the outer layer 21 is arranged on the outside of the composite material liner 20, the bottle body 1 is installed inside the protective sleeve 2, and the outer wall of the bottle body 1 is provided with a shock-absorbing strip 34 connected to the protective sleeve 2, a plurality of buffer seats 3 are arranged on the outer wall of the bottle body 1, and the inside of the buffer seat 3 is slidably connected with a buffer block 4, a guide rod 5 is arranged on the inner wall of the buffer seat 3, and the buffer block 4 is slidably sleeved on the outside of the guide rod 5, a buffer spring 6 connected to the buffer block 4 is arranged on the inner wall of the buffer seat 3, and the buffer spring 6 is sleeved on the outside of the guide rod 5, and the outer wall on one side of the buffer block 4 is provided with a buffer spring 6 connected to the buffer block 4. A rotating rod 7 is rotatably connected to the rotating shaft, a plurality of rotating seats 8 are arranged on the inner wall of the protective sleeve 2, and the other end of the rotating rod 7 away from the buffer block 4 is rotatably connected to the inside of the rotating seat 8 through the rotating shaft, a buffer cavity 9 is opened inside the buffer seat 3, and a plurality of extrusion blocks 10 are arranged on the inner wall of the protective sleeve 2, the extrusion block 10 is inserted into the inside of the buffer cavity 9, a buffer block 2 12 is slidably connected to the inside of the buffer cavity 9, and a guide rod 2 11 is arranged on the inner wall of the buffer cavity 9, the buffer block 2 12 is slidably sleeved on the outside of the guide rod 2 11, and a buffer spring 2 13 connected to the buffer block 2 12 is arranged on the inner wall of the buffer cavity 9, a buffer spring 3 14 is arranged on the outer wall of the two buffer blocks 2 12, and the buffer spring 2 13 and the buffer spring 3 14 are both sleeved on the outside of the guide rod 2 11.

[0031] The present invention provides a designable infinite rigidity arc-shaped composite gas cylinder, comprising a bottle body 1, a protective sleeve 2 and a valve sleeve 25, wherein the bottle body 1 comprises a composite material liner 20, and an outer layer 21 is arranged on the outside of the composite material liner 20, the bottle body 1 is installed inside the protective sleeve 2, and a shock absorbing strip 34 connected to the protective sleeve 2 is arranged on the outer wall of the bottle body 1, a plurality of buffer seats 3 are arranged on the outer wall of the bottle body 1, and a buffer block 4 is slidably connected to the inside of the buffer seat 3, a guide rod 5 is arranged on the inner wall of the buffer seat 3, and the buffer block 4 is slidably sleeved on the outside of the guide rod 5, and a damping strip 34 connected to the buffer block 4 is arranged on the inner wall of the buffer seat 3 A buffer spring 6 is connected to the guide rod 5, and the buffer spring 6 is sleeved on the outside of the guide rod 5. A rotating rod 7 is rotatably connected to the outer wall of the buffer block 4 through a rotating shaft. A plurality of rotating seats 8 are arranged on the inner wall of the protective sleeve 2, and the other end of the rotating rod 7 away from the buffer block 4 is rotatably connected to the inside of the rotating seat 8 through a rotating shaft. A buffer cavity 9 is opened inside the buffer seat 3, and a plurality of extrusion blocks 10 are arranged on the inner wall of the protective sleeve 2. The extrusion block 10 is inserted into the inside of the buffer cavity 9. A buffer block 2 12 is slidably connected to the inside of the buffer cavity 9, and a guide rod 2 11 is arranged on the inner wall of the buffer cavity 9. The buffer block 2 12 is slidably sleeved on the guide rod 2 1 1, and the inner wall of the buffer cavity 9 is provided with a buffer spring 2 13 connected to the buffer block 2 12, and the outer wall of the two buffer blocks 2 12 is provided with a buffer spring 3 14, and the buffer spring 2 13 and the buffer spring 3 14 are both sleeved on the outside of the guide rod 2 11. When processing the gas cylinder, the composite material liner 20 with different arcs can be made according to the use space, and then different arc-shaped gas cylinders can be made, and the arc-shaped gas cylinder can break through the effect of the straight cylinder gas cylinder tending to be straight and round in the process of being subjected to internal pressure. When the gas cylinder is bumped in the vehicle, the shock-absorbing strip 34 can reduce the bumping force of the vehicle on the bottle body 1, and can play a role in shock absorption and protection for the bottle body 1. The protective cover 2 has the function of protecting the bottle body 1 from long-term bumps, which will shorten its service life. When the gas cylinder is squeezed, the squeezing force will be transmitted to the squeezing block 10 and the rotating seat 8 through the protective cover 2. The squeezing block 10 will squeeze the buffer block 2 12, and the buffer block 2 12 will squeeze the buffer spring 2 13 and open the buffer spring 3 14; the rotating seat 8 will push the rotating rod 7 to rotate, and the rotating rod 7 will drive the buffer block 1 4 to squeeze the buffer spring 1 6. Therefore, the elastic force of the buffer spring 1 6, the buffer spring 2 13 and the buffer spring 3 14 can buffer the squeezing force exerted on the protective cover 2, and can protect the bottle body 1 and prevent the bottle body 1 from being squeezed and deformed.

[0032] In an embodiment provided by the present invention, an inner auxiliary seat 15 is provided on the outside of the bottle body 1 , and an outer auxiliary seat 16 is provided on the inner wall of the protective sleeve 2 . The inner auxiliary seat 15 and the outer auxiliary seat 16 are used to fix the auxiliary spring 19 .

[0033] In another embodiment provided by the present invention, a guide sleeve 17 is provided on the outer wall of the inner auxiliary seat 15 , and the guide sleeve 17 is inserted into the inner part of the outer auxiliary seat 16 , and the guide sleeve 17 can guide the auxiliary spring 19 .

[0034] In another embodiment provided by the present invention, spring grooves 18 are provided on the inner walls of the inner auxiliary seat 15 and the outer auxiliary seat 16, and auxiliary springs 19 are provided on the inner walls of the two spring grooves 18 facing each other. The elastic force of the auxiliary springs 19 can absorb and buffer the extrusion force. The elastic force of the auxiliary springs 19 can buffer the extrusion force exerted on the protective cover 2, thereby protecting the bottle body 1.

[0035] In one embodiment provided by the present invention, the outer layer 21 includes a reinforcement layer 22, a flame retardant fiber layer 23 and a fire-resistant resin layer 24 from the inside to the outside, and the reinforcement layer 22 is arranged on the outer wall of the composite material inner liner 20, and the reinforcement layer 22 can increase the strength of the bottle body 1.

[0036] In another embodiment provided by the present invention, the flame retardant fiber layer 23 is wound on the outer wall of the reinforcement layer 22, and the fire-resistant resin layer 24 is arranged on the outer wall of the flame retardant fiber layer 23. The fire-resistant resin layer 24 can make the fire resistance of the bottle body 1 better.

[0037] In another embodiment provided by the present invention, the flame retardant fiber layer 23 includes a fiber winding layer 1 31, a fiber winding layer 2 32 and a fiber winding layer 33, and the fiber winding layer 1 31 is wound on the outer wall of the reinforcing layer 22, the fiber winding layer 2 32 is wound on the outside of the fiber winding layer 1 31, and the fiber winding layer 33 is wound on the outside of the fiber winding layer 2 32, and the fiber winding layer 1 31, the fiber winding layer 2 32 and the fiber winding layer 33 are all made of basalt fibers, which can effectively enhance the fire resistance of the composite gas cylinder, can ensure that the composite gas cylinder will not fail in the event of a fire, and improve safety.

[0038] In an embodiment provided by the present invention, the winding angle of the fiber winding layer 1 31 is 5-10°, the winding angle of the fiber winding layer 2 32 is 25-35°, and the winding angle of the fiber winding layer 33 is 90°. This winding method not only improves the fire resistance of the bottle body 1, but also improves the pressure resistance and wear resistance of the bottle body 1.

[0039] In another embodiment provided by the present invention, an extension tube 26 is provided at one end of the composite material inner liner 20, a connecting groove 27 is opened inside the valve sleeve 25, and the extension tube 26 is inserted into the connecting groove 27, and a sealing gasket 28 and a sealing ring 29 connected to the extension tube 26 are respectively provided on the inner wall of the connecting groove 27, and the sealing gasket 28 and the sealing ring 29 can ensure the sealing between the valve sleeve 25 and the composite material inner liner 20 and the outer layer 21.

[0040] In another embodiment provided by the present invention, one end of the valve sleeve 25 is located between the composite material inner liner 20 and the outer layer 21, and a valve body 30 is provided inside the valve sleeve 25, which can make the connection between the valve sleeve 25 and the composite material inner liner 20 and the outer layer 21 more firmly.

[0041] Working principle: When processing gas cylinders, composite material liners 20 with different arc shapes can be made according to the use space, and then different arc-shaped gas cylinders can be made, and the arc-shaped gas cylinders can break the effect of straight cylinders tending to be straight and rounded during the internal pressure process. Then, a reinforcement layer 22 is set on the outside of the composite material liners 20, and then the fiber winding layer 1 31 is wound on the outside of the reinforcement layer 22 at a winding angle of 5-10°, and then the fiber winding layer 2 32 is wound on the fiber winding layer 1 at a winding angle of 25-35°. The outer part of the fiber winding layer 31 is wound around the outer part of the fiber winding layer 2 32, and then the fiber winding layer 33 is wound around the outer part of the fiber winding layer 2 at a winding angle of 90°. Finally, the refractory resin layer 24 is applied to the outer part of the fiber winding layer 33. This winding method not only improves the fire resistance of the bottle body 1, but also improves the pressure resistance and wear resistance of the bottle body 1. The extension tube 26 at the end of the bottle body 1 is plugged into the inside of the valve sleeve 25, and a sealing pad 28 and a sealing ring 29 are arranged inside the valve sleeve 25, which can increase the sealing between the valve sleeve 25 and the extension tube 26. To prevent leakage, when the gas cylinder is bumped in the vehicle, the shock-absorbing strip 34 can reduce the bumping force of the vehicle on the bottle body 1, and can play a role of shock absorption and protection for the bottle body 1, and can prevent the bottle body 1 from being bumped for a long time, which will shorten the service life. When the gas cylinder is squeezed, most of the squeezing force will be transmitted to the squeezing block 10 and the rotating seat 8 through the protective sleeve 2, and the squeezing block 10 will squeeze the buffer block 2 12, and the buffer block 2 12 will squeeze the buffer spring 2 13 and open the buffer spring 3 14; the rotating seat 8 will Push the rotating rod 7 to rotate, and the rotating rod 7 will drive the buffer block 4 to squeeze the buffer spring 6. At the same time, after the protective sleeve 2 is subjected to the extrusion force, a small part of the extrusion force is transmitted to the outer auxiliary seat 16 and the auxiliary spring 19. The elastic force of the auxiliary spring 19 can absorb and buffer the extrusion force. Therefore, the elastic force of the buffer spring 1 6, the buffer spring 2 13, the buffer spring 3 14 and the auxiliary spring 19 can buffer the extrusion force exerted on the protective sleeve 2, prevent the bottle body 1 from being squeezed and deformed, and protect the bottle body 1.

[0042] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A designable infinite stiffness arc-shaped composite gas cylinder, comprising a cylinder body (1), a protective sleeve (2) and a valve sleeve (25), characterized in that: The bottle body (1) comprises a composite material inner liner (20), and an outer layer (21) is arranged on the outside of the composite material inner liner (20); the bottle body (1) is installed inside the protective sleeve (2), and a shock absorbing strip (34) connected to the protective sleeve (2) is arranged on the outer wall of the bottle body (1); a plurality of buffer seats (3) are arranged on the outer wall of the bottle body (1), and a buffer block (4) is slidably connected inside the buffer seat (3); a guide rod (5) is arranged on the inner wall of the buffer seat (3), and the buffer block (4) is slidably sleeved on the outside of the guide rod (5); a buffer spring (6) connected to the buffer block (4) is arranged on the inner wall of the buffer seat (3), and the buffer spring (6) is sleeved on the outside of the guide rod (5); a rotating rod (7) is rotatably connected to the outer wall of one side of the buffer block (4) via a rotating shaft; and a A plurality of rotating seats (8), and the other end of the rotating rod (7) away from the buffer block (4) is rotatably connected to the inside of the rotating seat (8) through a rotating shaft, a buffer cavity (9) is opened inside the buffer seat (3), and a plurality of extrusion blocks (10) are arranged on the inner wall of the protective sleeve (2), and the extrusion blocks (10) are inserted into the inside of the buffer cavity (9), and the inside of the buffer cavity (9) is slidably connected with a buffer block (12), and a guide rod (11) is arranged on the inner wall of the buffer cavity (9), and the buffer block (12) is slidably sleeved on the outside of the guide rod (11), and a buffer spring (13) connected to the buffer block (12) is arranged on the inner wall of the buffer cavity (9), and a buffer spring (14) connected to the buffer block (12) is arranged on the outer wall of the two buffer blocks (12), and the buffer spring (13) and the buffer spring (14) are both sleeved on the outside of the guide rod (11).

2. A designable infinite stiffness arc-shaped composite gas cylinder according to claim 1, characterized in that: An inner auxiliary seat (15) is arranged on the outside of the bottle body (1), and an outer auxiliary seat (16) is arranged on the inner wall of the protective sleeve (2).

3. A designable infinite stiffness arc-shaped composite gas cylinder according to claim 2, characterized in that: A guide sleeve (17) is provided on the outer wall of the inner auxiliary seat (15), and the guide sleeve (17) is inserted into the interior of the outer auxiliary seat (16).

4. A designable infinite stiffness arc-shaped composite gas cylinder according to claim 3, characterized in that: The inner walls of the inner auxiliary seat (15) and the outer auxiliary seat (16) are both provided with spring grooves (18), and the inner walls of the two spring grooves (18) facing each other are provided with auxiliary springs (19).

5. A designable infinite stiffness arc-shaped composite gas cylinder according to claim 4, characterized in that: The outer layer (21) comprises, from the inside to the outside, a reinforcement layer (22), a flame retardant fiber layer (23) and a fire resistant resin layer (24), and the reinforcement layer (22) is arranged on the outer wall of the composite material inner liner (20).

6. A designable infinite stiffness arc-shaped composite gas cylinder according to claim 5, characterized in that: The flame retardant fiber layer (23) is wound on the outer wall of the reinforcement layer (22), and the fire-resistant resin layer (24) is arranged on the outer wall of the flame retardant fiber layer (23).

7. A designable infinite stiffness arc-shaped composite gas cylinder according to claim 6, characterized in that: The flame retardant fiber layer (23) includes a fiber winding layer one (31), a fiber winding layer two (32) and a fiber winding layer three (33), and the fiber winding layer one (31) is wound on the outer wall of the reinforcing layer (22), the fiber winding layer two (32) is wound on the outside of the fiber winding layer one (31), and the fiber winding layer three (33) is wound on the outside of the fiber winding layer two (32).

8. The designable infinite stiffness arc-shaped composite gas cylinder according to claim 7, characterized in that: The winding angle of the fiber winding layer one (31) is 5-10°, the winding angle of the fiber winding layer two (32) is 25-35°, and the winding angle of the fiber winding layer three (33) is 90°.

9. A designable infinite stiffness arc-shaped composite gas cylinder according to claim 8, characterized in that: An extension tube (26) is provided at one end of the composite material inner liner (20), a connection groove (27) is provided inside the valve sleeve (25), and the extension tube (26) is inserted into the interior of the connection groove (27), and a sealing gasket (28) and a sealing ring (29) connected to the extension tube (26) are respectively provided on the inner wall of the connection groove (27).

10. A designable infinite stiffness arc-shaped composite gas cylinder according to claim 9, characterized in that: One end of the valve sleeve (25) is located between the composite material inner liner (20) and the outer layer (21), and a valve body (30) is arranged inside the valve sleeve (25).

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