Wrapped gas cylinder tube bundle container

Abstract

The present invention discloses a wrapped gas cylinder bundle container, comprising: a front end plate, a rear end plate and 9 large-volume steel liner circumferential carbon fiber wrapped gas cylinders, the two ends of the wrapped gas cylinders are respectively connected to the front connection flange and the new anti-rotation combination flange, the anti-rotation combination flange is composed of a flange, a clamping block I and a clamping block II, the clamping block II is fastened to the flange by a hexagon socket bolt, the wrapped gas cylinder is connected after fastening, and after rotation, the clamping block I is fastened to the clamping block II by a hexagon socket bolt, and the flange is fixed to the rear end plate with bolts. The present invention has the advantages of small gas cylinder weight-to-volume ratio, large volume, light weight, small number of pipeline connection points and welding points, small leakage points, and good pipeline system structural stability.

Description

Technical Field

[0001] The invention relates to the field of mobile pressure vessels, and in particular to a gas cylinder tube bundle-wrapped container. Background Art

[0002] The development of clean energy vehicles has become the best choice for countries around the world to improve the environment and achieve sustainable development. With the increasing development of clean energy vehicles, the demand for natural gas and hydrogen is also growing. Transportation is an important part of the development of natural gas and hydrogen. At present, natural gas is mainly transported by LNG tank trucks, LNG tank containers, CNG long tube trailers and CNG tube bundle containers, and hydrogen is mainly transported by long tube trailers and tube bundle containers. There are two types of existing cylinder tube bundle containers: one is a tube bundle container assembled from large-volume seamless steel cylinders (such as Figure 1 As shown in the figure, currently, a bundle container or long tube trailer is assembled with 6 to 10 large-volume seamless steel gas cylinders with a nominal working pressure of 20MPa and a thickness of 16.5mm to 21.2mm. The existing long tube trailers and bundle containers are mainly assembled with large-volume seamless steel gas cylinders with an outer diameter of 559 to 719mm, and the maximum volume is only 26m 3 , the deadweight reaches more than 34 tons, and the gas cylinder weight-to-volume ratio (ratio of weight to volume) is large. This method often leads to the tube bundle container or long tube trailer being too heavy, small in volume, small in loading capacity, and high in transportation cost, which is not conducive to energy conservation and emission reduction. At the same time, the existing large-volume steel seamless gas cylinder tube bundle container, because the cylinder is exposed to the natural environment, the outer wall of the cylinder cannot be effectively protected. Another type of tube bundle container (such as Figure 2 , 3 As shown in the figure, a small-volume wrapped gas cylinder with a volume of 30 to 450L is generally used to assemble a bundle container. The bundle container gas cylinders assembled in this way have small volume and large number, many valves, many pipeline welding points or connection points, inconvenient operation, inconvenient regular inspection, and many leakage points, which increases the risk during operation. At the same time, the existing branch pipelines of the pipeline system structure of the bundle container are hard-connected, and its shock-absorbing performance is easy to cause cracks or even breaks at the connection or weld due to thermal expansion and contraction, resulting in medium leakage and harm.

[0003] Under the premise of weight restrictions on domestic and international road transport, how to reduce the weight of gas cylinders, increase the gas loading capacity, and improve the stability of the pipeline system has become a key issue to be solved. Compared with steel gas cylinders, large-volume wrapped gas cylinders have light weight, small weight-to-volume ratio, and good pipeline system structural stability. The bundled container assembled with high-pressure wrapped gas cylinders has a large volume and large loading capacity, which effectively reduces the unit transportation cost and complies with the national policy of "energy conservation and emission reduction". Summary of the invention

[0004] In order to overcome the technical defects of the existing tube bundle containers assembled from large-volume seamless steel cylinders, such as heavy vehicle weight, small volume, small loading capacity, high transportation cost, disadvantageous for energy conservation and emission reduction, and exposed steel cylinders, and the technical defects of the existing tube bundle containers assembled from small-volume wrapped gas cylinders, such as small cylinder volume, large number, many valves, many pipeline welding points or connection points, inconvenient operation, inconvenient inspection, many leakage points, and high risk during operation, the purpose of the present invention is to provide a lightweight tube bundle container that can reliably protect wrapped gas cylinders. A 40-foot tube bundle container is provided, which is assembled with 9 20MPa steel liner annular wrapped gas cylinders with an outer diameter of 719mm. The volume of a single gas cylinder reaches 4160L, and the total volume reaches 37m 3 . The wrapped gas cylinder bundle container uses a large-volume steel liner with a high volume-to-weight ratio and a circumferential carbon fiber wrapped gas cylinder as a gas storage container. The surface of the steel liner of the wrapped gas cylinder is cured with a composite material wrapped pressure-bearing protective layer. The composite material wrapped pressure-bearing protective layer consists of a carbon fiber wrapped pressure-bearing layer and a glass fiber wrapped protective layer. The glass fiber wrapped protective layer is arranged on the outside of the carbon fiber wrapped pressure-bearing layer to protect the carbon fiber from dust, acid rain and other erosion in the environment. This type of gas cylinder is an upgraded product of steel gas cylinders, which greatly improves the volume-to-weight ratio of gas cylinders and increases the gas carrying capacity. At the same time, lightweight gas cylinders and tube bundle containers also greatly improve the transportation efficiency of gas.

[0005] The two ends of the wrapped gas cylinder are connected to the front connection flange and the new anti-rotation combination flange respectively. The anti-rotation combination flange consists of flange 1, clamping block I and clamping block II. The clamping block II is fastened to the flange by the hexagon socket bolts. After fastening, the wrapped gas cylinder is connected. After rotation, the clamping block I and the clamping block II are fastened by the hexagon socket bolts, and the flange is fixed to the rear end plate with bolts. It can effectively prevent the axial rotation of the gas cylinder. The pipeline system adopts a flexible connection structure, which can reduce vibration between the pipeline systems, is not easy to break, is more stable and is not easy to leak.

[0006] The bundled container is a closed whole with steel plates welded on the sides and bottom, which can effectively protect against UV radiation, gravel impact, chemical corrosion, and scratches from sharp objects, effectively extending the service life of the gas cylinder. The top of the bundled container is capped with a steel top plate or tarpaulin to further ensure the safe operation of the wrapped gas cylinder.

[0007] In another preferred embodiment, the method for manufacturing the steel liner hoop-wrapped gas cylinder comprises:

[0008] The two ends of the large diameter seamless steel pipe are hot-spun into spherical heads, and then subjected to tempering heat treatment, thread processing and other processes to form a seamless steel liner that can be threadedly connected to the end plug;

[0009] The seamless steel liner is subjected to a quenching and tempering heat treatment process to transform the metallographic structure of the seamless steel liner into tempered troostite;

[0010] Prepare glue, wherein the glue is epoxy resin glue;

[0011] The fiber material and the adhesive are wound and solidified on the surface of the seamless steel liner to form a pressure-bearing layer;

[0012] Glass fiber and epoxy resin are wound and cured on the surface of the pressure-bearing layer to form a protective layer;

[0013] The gas cylinder is transferred to a curing furnace for drying and curing to obtain a large-diameter seamless steel liner hoop-wrapped gas cylinder.

[0014] In another preferred embodiment, the fiber material is selected from carbon fiber, glass fiber, polyacrylonitrile pre-oxidized fiber, graphite fiber or other composite materials.

[0015] In another preferred embodiment, the initial winding spiral angle of the fibers in the pressure-bearing layer formed by winding and curing the fiber material is not less than 60 degrees; the winding spiral angle increases uniformly, and the winding method is alternating forward and reverse directions and cross winding.

[0016] In another preferred embodiment, in the quenching and tempering heat treatment process, the temperature in the quenching furnace is 860-880°C, the temperature in the tempering furnace is 600-680°C, and the stepping time of the seamless steel liner is 20-40min (the gas cylinders are manufactured in batches, and 30-50 cylinders can be selected in each batch for continuous heat treatment, and each time a single cylinder enters the furnace. The stepping time refers to the interval time between the front and rear gas cylinders entering the heat treatment furnace); after the temperature of the seamless steel liner in the quenching furnace reaches 860-880°C, it enters the quenching tank through the conveyor line, and the seamless steel liner itself rotates at a speed of 20-30r / min, and the quenching liquid is sprayed from the top to achieve the effect of rapid cooling; so that the roundness of the seamless steel liner after the quenching and tempering heat treatment (i.e., the difference between the maximum outer diameter and the minimum outer diameter on the same cross section) does not exceed 2% of the average outer diameter of the cross section, and the straightness does not exceed 0.15% of the total length; the tempered troostite grain size is ≥6 levels.

[0017] In another preferred embodiment, the adhesive solution is specifically prepared by preparing epoxy resin adhesive solution in a proportion, wherein the proportion is calculated by mass ratio, epoxy resin: curing agent: defoaming agent: toughening agent: accelerator = 100:90:1:15:1. This ratio can prevent air from being mixed into the epoxy resin and producing porous, reduce the brittleness of the pressure-bearing layer, increase toughness, improve bearing strength, and obtain good heat resistance, water resistance, and corrosion resistance. At the same time, the curing speed can be artificially controlled to ensure sufficient time to complete the winding work.

[0018] In another preferred example, the processing procedure of winding and curing to form a pressure-bearing layer at least includes: connecting the seamless steel liner to a winding device, the winding device at least includes a component that can rotate the liner, a trolley that can move the liner forward and backward, and a glue tank; pouring the glue into the glue tank, and introducing the carbon fiber into the winding head on the winding device after passing through the glue tank, the number of fiber roots is set to 24, the preload force is 10N, and ready for winding; winding according to the set procedure and the number of fiber roots; during winding, when the carbon fiber passes through the glue tank, the glue in the glue tank adheres to the carbon fiber and is wound around the bottle together, the rotation speed of the liner is 20r / min, and the forward speed of the trolley is: 9844mm / min; after the carbon fiber winding is completed, the joint is cut off to form a pressure-bearing layer.

[0019] In another preferred embodiment, the processing steps of winding and curing to form a protective layer at least include: introducing the glass fiber into the winding head on the winding equipment after passing it through the glue groove to prepare for winding; winding according to the set program and the number of fibers; during winding, when the glass fiber passes through the glue groove, the glue in the glue groove adheres to the glass fiber and is wound around the bottle body together, and the excess glue is scraped off with a scraper to form a protective layer, and then a gas cylinder label is attached to the protective layer.

[0020] In another preferred embodiment, the process of winding and curing to form a protective layer also includes a drying and curing process, and the drying and curing process includes: transferring the wrapped gas cylinder to a curing furnace for drying and curing, and paying attention to monitoring the curing temperature to prevent abnormal temperature (too high or too low).

[0021] In another preferred example, the drying and curing process also includes a water pressure test process, a drying process, and a cleaning process, wherein the water pressure test process includes: connecting the cured gas cylinder to the water jacket cover and tightly connecting it, applying self-tightening pressure, maintaining the pressure for 60 seconds, applying water pressure test pressure, and maintaining the pressure for 120 seconds; calculating the total expansion, elastic expansion, and residual expansion rate. The residual expansion rate of the gas cylinder must be less than 5%, and the qualified gas cylinder is transferred to the drying process; the drying process includes inverting the test bottle to drain the water in the gas cylinder, and purging the inside of the gas cylinder with steam; the cleaning process includes cleaning up the glue residue, dirt and damage on the inner and outer surfaces.

[0022] In another preferred embodiment, the initial winding spiral angle of the carbon fiber in the carbon fiber winding pressure-bearing layer is not less than 60 degrees, and a pre-tightening force of the high-strength fiber is applied. Combined with the uniform increase in the winding spiral angle and the alternating forward and reverse directions and cross winding, the consistency of the stress state of the fibers between the layers during the inflation process can be more reasonably distributed, so that a relatively ideal reinforcement effect can be achieved with fewer fibers.

[0023] In another preferred embodiment, a protective layer is added outside the carbon fiber composite material pressure-bearing layer. The function of the protective layer is to prevent the impact damage from cutting off the carbon fibers in the composite material reinforced pressure-bearing layer, thereby forming a local fatigue failure point, resulting in the failure of the entire composite material pressure-bearing layer's compensating effect on the inner liner.

[0024] In another preferred embodiment, carbon fiber and epoxy resin or glass fiber and epoxy resin or polyacrylonitrile pre-oxidized fiber and epoxy resin or graphite fiber and epoxy resin or other composite materials and epoxy resin are wound and cured to form a pressure-bearing layer.

[0025] In another preferred embodiment, the protective layer is formed by winding and curing glass fiber and epoxy resin.

[0026] In another preferred embodiment, the winding pressure-bearing layer is wound with strips or cloth woven from the above-mentioned fibers.

[0027] In another preferred embodiment, the steel inner container 1 has a large volume of 2000 to 4300 liters.

[0028] In another preferred embodiment, a seamless steel tube with a diameter of 671 mm to 719 mm is used to manufacture the steel liner, so that the volume of the wrapped gas cylinder reaches 2000 L to 4300 L;

[0029] A special spinning process is used to ensure that the head shape of the seamless steel pipe with a thickness of 8.8mm to 16mm and a diameter of 671mm to 719mm meets the design requirements. The outer diameter of the gas cylinder mouth is guaranteed to be ￠144 to 148mm, and the inner diameter is guaranteed to be ￠85 to 95mm;

[0030] The rotary spray heat treatment process is adopted to ensure that the roundness of the seamless steel liner with a diameter of 8.8mm to 16mm and a diameter of 671mm to 719mm (i.e. the difference between the maximum outer diameter and the minimum outer diameter on the same section) does not exceed 2% of the average outer diameter of the section; the straightness does not exceed 0.15% of the total length, the metallographic structure is tempered troostite, and the grain size is ≥6 grades;

[0031] The combined winding process of orthogonal winding and cross winding is adopted to make the carbon fiber bear both radial stress and axial stress, strengthen and reasonably distribute the force between each layer of carbon fiber in the winding, and at the same time, the gaps between the carbon fibers are filled with epoxy resin. After the resin is cured, the orthogonal wound and cross wound carbon fibers become a whole, so that the carbon fiber pressure-bearing layer can withstand a bursting pressure that exceeds 1.25 times the nominal working pressure of the wound gas cylinder.

[0032] Connect the solidified gas cylinder to the water jacket cover and connect them tightly. First, pressurize it to the self-tightening pressure to produce a plastic deformation layer on the inner wall of the gas cylinder liner. After the entire gas cylinder is unloaded, the inner surface of the gas cylinder is under external pressure, and the carbon fiber pressure-bearing layer is under internal pressure, which strengthens and reasonably distributes the force between each layer of carbon fiber. After the water pressure test, the residual expansion rate of the gas cylinder is less than 5%.

[0033] In another preferred example, the connecting pipeline adopts a flexible connecting structure. Preferably, a protective layer is provided outside the flexible connecting structure, and the protective layer is made of rubber material.

[0034] In another preferred embodiment, the flexible connection structure is a connecting pipe, and a plurality of folds are arranged on the surface of the connecting pipe along the connecting pipe. The pipe structure for connecting pipes can reduce vibration through the connection of the flexible connection structure, making the pipe system more stable.

[0035] Optionally, the connecting pipeline adopts a flexible connection structure, which adopts a continuous flexible tube, and a rope or filament is added in the longitudinal direction of the tube to enhance the resistance to high tensile force, thereby increasing the flexibility of the flexible connection structure. The flexible tube can absorb and buffer vibration during use to avoid loosening of the connection point of the pipeline system.

[0036] In another preferred embodiment, the connecting pipeline adopts a flexible connecting structure pipe, and the flexible connecting structure pipe comprises a flexible substrate, a metal unit and a protective layer. The flexible substrate can be a cycloolefin polymer substrate or a polyimide substrate. The metal unit can be a copper layer or an aluminum layer. The protective layer is made of a rubber material.

[0037] In another preferred embodiment, the flexible connection structure specifically comprises an inner tube and an outer tube, the outer tube comprises a straight tube portion and a telescopic portion, the straight tube portion is sleeved outside the inner tube, and the telescopic portion is sleeved outside the inner tube. The flexible connection structure has good elasticity, is easy to restore to its original shape after deformation, and has good shock absorption effect.

[0038] In another preferred embodiment, the connecting pipeline adopts a flexible connecting structure, and the flexible connecting structure is a spiral structure. The spiral flexible connecting structure has good deformation ability, and after being subjected to impact, the impact force can be buffered by structural deformation, thereby improving the buffering and shock absorbing function.

[0039] The present invention has the following advantages: 1) The 20MPa large-volume steel liner carbon fiber hoop-wrap gas cylinder is light in weight, large in volume, and has a small weight-to-volume ratio; 2) Nine 20MPa large-volume steel liner carbon fiber hoop-wrap gas cylinders are used as pressure vessels, and the volume of the wrapped gas cylinder bundle container is 37m 3, 20MPa steel seamless gas cylinder tube bundle container, the hydrogen loading capacity is increased by 47.1%; the number of wrapped gas cylinders and valves is reduced, the number of connection points and welding points of the pipeline is reduced, the leakage points are reduced, and the risks during operation are reduced; 3) The wrapped gas cylinder adopts a combined winding process of orthogonal winding and cross winding, so that the carbon fiber can withstand both radial stress and axial stress; 4) A new type of anti-rotation structure for high-pressure thin-walled gas storage and transportation cylinders is adopted to prevent circumferential rotation and axial movement of the wrapped gas cylinders during transportation; 5) 1.5mm steel plates are welded on the sides and bottom of the tube bundle container, which can play a role in fire and water prevention, and can also be used in transportation It can block the splashing of sand and gravel, effectively protect the gas cylinders from damage, and extend the service life of the gas cylinders. The top of the tube bundle container adopts a 1.5mm steel top or a fire-proof, waterproof and corrosion-resistant tarpaulin as the capping, which ensures that the wrapped gas cylinders are not affected by the splashing of sand and gravel from the top. The movable shutters installed on the side can accelerate the flow of internal air when the temperature inside the tube bundle container is high, thereby achieving rapid cooling; 6) The flexible connection structure of the spiral pipeline is adopted between the main line and the bottle valve, and the pipeline system is more stable, which can ensure that there is no gas leakage in the case of severe vibration; 7) The pipelines are concentrated in the rear warehouse, which is easy to operate and convenient for annual inspection and regular inspection.

[0040] The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of a large-capacity seamless steel gas cylinder tube bundle container structure involved in the prior art;

[0042] Figure 2 It is a front view schematic diagram of a small-volume wrapped gas cylinder tube bundle container structure involved in the prior art;

[0043] Figure 3 It is a top view schematic diagram of a small-volume wrapped gas cylinder tube bundle container structure involved in the prior art;

[0044] Figure 4 This is a schematic diagram of the structure of a wrapped gas cylinder tube bundle container involved in the present invention;

[0045] Figure 5 A top view of a wrapped gas cylinder tube bundle container according to the present invention;

[0046] Figure 6 It is a schematic diagram of the structure of the wrapped gas cylinder of the wrapped gas cylinder tube bundle container involved in the present invention;

[0047] Figure 7 It is a schematic diagram of the connection between the wrapped gas cylinder and the rear end plate of the wrapped gas cylinder bundle container involved in the present invention;

[0048] Figure 8 It is a schematic diagram of the connection between the wrapped gas cylinder and the front end plate of the wrapped gas cylinder bundle container involved in the present invention;

[0049] Fig. 9 This is a schematic diagram of the door structure of the wrapped gas cylinder tube bundle container involved in the present invention;

[0050] Fig.10 It is a schematic diagram of the flange structure of the wrapped gas cylinder tube bundle container involved in the present invention;

[0051] Fig.11 It is a structural schematic diagram of the compression block I of the wrapped gas cylinder tube bundle container involved in the present invention;

[0052] Fig.12 The figure is a schematic structural diagram of the compression block II of the wrapped gas cylinder tube bundle type container involved in the present invention.

[0053] In the figure: 1. rear end plate, 2. anti-rotation combined flange, 3. movable shutter, 4. box body, 5. wrapped gas cylinder, 6. front end plate, 7. front connecting flange, 8. tarpaulin, 9. rear bottle plug, 10. steel liner, 11. carbon fiber wrapped pressure bearing layer, 12. glass fiber wrapped protective layer, 13. front bottle plug, 14. flange, 15. clamping block I, 16. clamping block II, 17. box door DETAILED DESCRIPTION

[0054] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention should be understood as not being limited to the embodiments described below, and the technical concept of the present invention can be implemented in combination with other known technologies or other technologies with the same functions as those known technologies.

[0055] In the description of the following specific embodiments, in order to clearly demonstrate the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "rear", "left", "right", "outside", "inside", "outward", "inward", "axial", "radial" and the like should be understood as convenient terms and should not be understood as restrictive terms.

[0056] The following is combined with Figure 4-12 Specific embodiments of the present invention are described in detail.

[0057] Figure 4-5 The schematic diagram and top view of the tube bundle container structure involved in the present invention include 1, rear end plate, 2, anti-rotation combination flange, 3, movable shutter, 4, box body, 5, wrapped gas cylinder, 6, front end plate, 7, front connecting flange, 8, tarpaulin.

[0058] Figure 6The present invention is a schematic diagram of the wrapped gas cylinder structure of the wrapped gas cylinder bundle container, which includes 9, a rear bottle stopper, 10, a steel liner, 11, a carbon fiber wrapped pressure-bearing layer, 12, a glass fiber wrapped protective layer, and 13, a front bottle stopper.

[0059] The bundled container includes a box body and a plurality of large-volume steel liner circumferential carbon fiber wrapped gas cylinders 5 placed transversely inside the frame structure. The large-volume steel liner circumferential carbon fiber wrapped gas cylinder includes a steel liner 10, composite material wrapped protective layers 11 and 12, a front end plug 9 and a rear end plug 13. The surface of the steel liner is cured with a composite material wrapped pressure-bearing protective layer, which is composed of a carbon fiber wrapped pressure-bearing layer 11 and a glass fiber wrapped protective layer 12. The epoxy resin is in the gap between the carbon fiber wrapped pressure-bearing layer and the glass fiber wrapped protective layer. After being heated and cured, the carbon fiber wrapped pressure-bearing layer and the glass fiber wrapped protective layer are tightly combined to form a whole. The wrapped gas cylinder is roughly cylindrical and has an inner cavity. The bottle plug is provided with an inner hole, and the bottle plug is placed at the open end of the wrapped gas cylinder body. The inner cavity of the large-volume steel liner circumferential carbon fiber wrapped gas cylinder 5 is connected to the outside through the inner hole of the bottle plug. The front end plug is connected to the rear end safety device, and the rear end plug is installed with a connecting pipeline. The gas cylinder can be filled with and discharged with the medium through the bottle stopper.

[0060] The connecting pipes of the bundled container pipeline system all adopt flexible connection structures (not shown in the figure), which can make the pipeline system more stable and less prone to leakage. Specifically, the flexible connection structure adopted between the main pipeline and the bottle valve makes the pipeline system more stable and can ensure that there is no gas leakage in the case of severe vibration.

[0061] In another preferred embodiment, the connection pipeline adopts a flexible connection structure, which adopts a continuous flexible tube, and a rope or filament is added in the longitudinal direction of the flexible tube to enhance the resistance to high tensile force. Specifically, the flexible connection structure is a connecting pipe fitting, and the surface of the connecting pipe fitting is provided with a plurality of folds along the connection pipe fitting. The pipe fitting structure for connecting the pipeline reduces vibration through the connection of the flexible connection structure, making the pipeline system more stable.

[0062] In another preferred embodiment, the flexible connection structure is a connecting pipe, and a plurality of folds are arranged on the surface of the connecting pipe along the connecting pipe. The pipe structure for connecting pipes can reduce vibration through the connection of the flexible connection structure, making the pipe system more stable.

[0063] In another preferred embodiment, the connecting pipeline adopts a flexible connection structure, and the flexible connection structure adopts a continuous flexible tube. Ropes or filaments that enhance resistance to high tensile forces are added in the longitudinal direction of the tube, thereby increasing the flexibility of the flexible connection structure. The flexible tube can absorb and buffer vibrations during use to avoid loosening of the connection points of the pipeline system.

[0064] In another preferred embodiment, the connecting pipeline adopts a flexible connecting structure pipe, and the flexible connecting structure pipe comprises a flexible substrate, a metal unit and a protective layer. The flexible substrate can be a cycloolefin polymer substrate or a polyimide substrate. The metal unit can be a copper layer or an aluminum layer. The protective layer is made of a wire clamping rubber material.

[0065] In another preferred embodiment, the flexible connection structure specifically includes an inner tube and an outer tube, the two ends of the inner tube are respectively connected to the inner tube interfaces of the two joints in a quick-clamp manner, and the outer tube includes a straight tube portion and a telescopic portion, the straight tube portion is sleeved outside the inner tube, and one end of the straight tube portion is connected to the outer tube interface of one joint in a quick-clamp manner, and the other end of the straight tube portion is connected to one end of the telescopic portion in a quick-clamp manner, and the telescopic portion is sleeved outside the inner tube, and the other end of the telescopic portion is connected to the outer tube interface of another joint in a quick-clamp manner, and the telescopic portion is a telescopic structure. The flexible connection structure has good elasticity, is easy to restore to its original state after deformation, and has a good shock absorption effect.

[0066] In another preferred embodiment, the connecting pipeline adopts a flexible connection structure, and the flexible connection structure is a spiral structure, specifically, the spiral structure includes rigid spiral protrusions and flexible spiral grooves spaced apart, and the spiral protrusions fit each other when the spiral grooves are contracted and folded, so as to achieve the function of expansion and contraction. The spiral flexible connection structure has good deformation ability, and after being subjected to impact, the impact force can be buffered by the deformation of the structure, thereby improving the buffering and shock absorption function.

[0067] Figure 6 The wrapped gas cylinders of the wrapped gas cylinder bundle container involved adopt a combined winding process of orthogonal winding and cross winding, so that the carbon fiber can bear both radial stress and axial stress, and strengthen the reasonable distribution of the force between each layer of carbon fiber in the winding. At the same time, the gaps between the carbon fiber and the glass fiber are filled with epoxy resin. After the resin is cured, the orthogonal and cross-wound carbon fibers become a whole, so that the carbon fiber pressure-bearing layer can withstand a bursting pressure that exceeds 2.5 times the nominal working pressure of the wrapped gas cylinder. The cured gas cylinder is connected to the water jacket cover and tightly connected. First, pressurize it to the self-tightening pressure to produce a plastic deformation layer on the inner wall of the gas cylinder liner. After the entire gas cylinder is unloaded, the inner surface of the gas cylinder is subjected to external pressure, and the carbon fiber pressure-bearing layer is subjected to internal pressure, which strengthens the reasonable distribution of the force between each layer of carbon fiber. After the water pressure test, the residual expansion rate of the gas cylinder is less than 5%.

[0068] The large-volume steel liner annular carbon fiber wrapped gas cylinder comprises a steel liner 1, a pressure-bearing layer is arranged outside the steel liner, a protective layer is arranged outside the pressure-bearing layer, the pressure-bearing layer comprises a carbon fiber wrapped pressure-bearing layer 2, and the protective layer comprises a glass fiber wrapped protective layer 3. One section of the steel liner 1 is screwed and fixed to the front end cover 5 through an internal thread, and the other end is screwed and fixed to the rear end cover 4. The carbon fiber wrapped pressure-bearing layer 2 adopts a combined winding process of orthogonal winding and cross winding, so that the carbon fiber can bear both radial stress and axial stress, and strengthen the reasonable distribution of the force between each layer of carbon fiber in the winding. At the same time, the gaps between the carbon fibers are filled with epoxy resin. After the resin is cured, the orthogonally wound and cross-wound carbon fibers become a whole, and the structural characteristics of correlation and consistency of mutual compensation are strengthened, so that the elastic deformation generated by the liner during repeated filling and discharge of high-pressure gas is strictly controlled within the theoretical specification value. The following briefly describes the manufacturing method of the main components of the wrapped gas cylinder:

[0069] Seamless steel liner

[0070] Select seamless steel pipes of corresponding diameter and length, hot spin them into spherical heads at both ends, seal them and increase the pressure at both ends, and put them into the furnace for tempering heat treatment. Carry out hardness testing, internal and external thread processing, water pressure testing, internal polishing, endoscopy, and non-destructive testing, external polishing and other processes to make hot-spun compression seamless steel liner that can be connected to the inlet and outlet valves and end plugs. High-strength carbon fiber is wound on the seamless steel liner, generally using customized winding equipment, and the seamless steel liner is connected to the winding machine with the help of a special clamp. The steel liner has a large volume of 2000 to 4300 liters. Among them, the two ends of the seamless steel pipe are hot-spun to form the bottle shoulder and bottleneck, and then tempered heat treatment, internal and external thread processing, to make a seamless steel liner that can be connected to the end plug and valve, and then pass hardness testing, water pressure testing and non-destructive testing to verify whether it is qualified.

[0071] Pressure layer

[0072] Prepare glue in proportion. The glue is epoxy resin glue. The glue is prepared in small quantities and multiple times. No more than 5 kg of epoxy resin should be prepared each time. The glue should be fully stirred for no less than 3 minutes. Connect the seamless steel liner to the winding equipment, pour the glue into the glue tank, introduce the fiber into the winding head on the winding equipment, and prepare for winding. Wind according to the set procedure and the number of fibers. During winding, when the fiber passes through the glue tank, the glue in the glue tank adheres to the fiber and is wound around the bottle together; after the fiber winding is completed, cut off the joint.

[0073] Protective layer

[0074] Introduce the glass fiber into the winding head on the winding equipment and prepare for winding. Wind according to the set program and fiber number. During winding, when the glass fiber passes through the glue groove, the glue in the glue groove adheres to the glass fiber and is wound around the bottle body. Use a scraper to scrape off the excess glue and affix the gas cylinder label on the last layer.

[0075] The 20MPa-30MPa large diameter seamless steel liner hoop-wound gas cylinder including the above components includes a hot-spun compression port seamless steel liner, and the outer wall of the liner is wound and solidified to form a composite pressure-bearing layer, the front end plug and the rear end plug are connected by means of the internal threads of the bottlenecks at both ends, the rear end plug is provided with an inlet and outlet valve and a sewage discharge device, and the front end plug is provided with a safety discharge device. A protective layer is added outside the carbon fiber composite pressure-bearing layer in the present invention. The function of the protective layer is to prevent impact damage from cutting off the carbon fibers in the composite reinforced pressure-bearing layer, thereby forming a local fatigue failure point, resulting in the failure of the entire composite pressure-bearing layer to compensate for the pressure of the liner.

[0076] In another preferred embodiment, the pressure-bearing layer is a carbon fiber wound pressure-bearing layer 2, wherein the initial winding spiral angle of the carbon fiber is not less than 60 degrees, and a preload of high-strength fiber is applied. Combined with the uniform increase in the winding spiral angle and the alternating forward and reverse directions and cross winding, the consistency of the stress state of the fibers between the layers during the inflation process can be more reasonably distributed, so that a relatively ideal reinforcement effect can be achieved with fewer fibers.

[0077] In another preferred embodiment, a protective layer is added outside the carbon fiber composite material pressure-bearing layer. The function of the protective layer is to prevent impact damage from cutting off the carbon fibers in the composite material reinforced pressure-bearing layer, thereby forming a local fatigue failure point, resulting in the failure of the entire composite material pressure-bearing layer's compensating effect on the inner liner.

[0078] In another preferred embodiment, carbon fiber and epoxy resin are wound and cured to form a pressure-bearing layer; or other composite materials are wound and cured with epoxy resin to form a pressure-bearing layer; or glass fiber and epoxy resin are wound and cured to form a pressure-bearing layer; or polyacrylonitrile pre-oxidized fiber and epoxy resin are wound and cured to form a pressure-bearing layer; or graphite fiber and epoxy resin are wound and cured to form a pressure-bearing layer; or the protective layer is formed by winding and curing glass fiber and epoxy resin; or the wound pressure-bearing layer is wound with strips woven from the above fibers; or the wound pressure-bearing layer is wound with cloth woven from the above fibers; or the steel liner 1 has a large volume of 2000 to 4300 liters; or the steel liner 1 has a diameter of 671 to 719 mm and a thickness of 9.6 to 16 mm.

[0079] In another preferred embodiment, the steel liner 1 has a large volume of 719 mm, and the weight-to-volume ratio of the wrapped gas cylinder is 0.52-0.7 at 20 MPa, and 1.02-1.3 at 30 MPa. Under the same nominal working pressure, the weight ratio of the large-volume steel liner hoop-wrapped gas cylinder is 60% higher than that of the steel gas cylinder, which greatly reduces the dead weight of the gas cylinder and improves the loading quality and transportation efficiency of the medium.

[0080] In another preferred embodiment, the working pressure of the wrapped gas cylinder is 20-30 MPa.

[0081] In another preferred embodiment, the epoxy resin glue is prepared in a ratio of epoxy resin: curing agent: defoaming agent: toughening agent: accelerator (mass ratio) = 100:90:1:15:1. This ratio can prevent the epoxy resin from being mixed with air and producing porous, reduce the brittleness of the pressure-bearing layer, increase toughness, improve bearing strength, and obtain good heat resistance, water resistance, and corrosion resistance. At the same time, the curing speed can be artificially controlled to ensure sufficient time to complete the winding work.

[0082] In another preferred embodiment, the number of carbon fibers is set to 24 and the preload force is 10N.

[0083] In another preferred embodiment, the liner of the seamless steel liner of the gas cylinder adopts a quenching and tempering heat treatment process, the temperature in the quenching furnace is set to 860-880°C, the temperature in the tempering furnace is set to 600-680°C, and the step time is 20-40min (the gas cylinders are manufactured in batches, 30-50 can be selected for each batch, and heat treatment is continuously performed, and each time a single cylinder enters the furnace. The step time refers to the interval time between the front and rear gas cylinders entering the heat treatment furnace); after the temperature of the seamless steel liner of the gas cylinder reaches 860-880°C in the quenching furnace, it enters the quenching tank through the conveyor line, rotates itself, and the rotation speed is 20-30r / min. The quenching liquid is sprayed from the top to achieve the effect of rapid cooling. The roundness of the seamless steel liner after quenching and tempering heat treatment (i.e., the difference between the maximum outer diameter and the minimum outer diameter on the same cross section) does not exceed 2% of the average outer diameter of the cross section, and the straightness does not exceed 0.15% of the total length; the metallographic structure is tempered troostite, and the grain size is ≥6 levels.

[0084] The manufacturing process steps of the large-volume steel liner hoop carbon fiber wrapped gas cylinder are as follows:

[0085] ① Select seamless steel pipes of corresponding diameter and length, use both ends to hot spin into spherical heads, temper heat treatment, hardness test, internal and external thread processing, water pressure test, internal polishing, endoscopy, and non-destructive testing, external polishing and other processes to make a seamless steel liner that can be connected to the end plug thread.

[0086] Spinning uses special process parameters: Taking the wrapped gas cylinder with a diameter of 719mm and 20MPa as an example, the spinning process parameters are: the length of the pipe mouth entering the medium frequency is 600mm~700mm, the heating temperature of the pipe mouth is 1200℃~1350℃, the main shaft clamping pressure is 5.3MPa, and the corresponding voltage and current are adopted in the heating stages of the medium frequency furnace P1, P2, and P3. During spinning, the main shaft speed is 200r / min~300r / min. After 13~18 arc spinnings of the spinning wheel, the outer diameter of the gas cylinder mouth is guaranteed to be ￠144~148mm, and the inner diameter is guaranteed to be ￠85~95mm. The conformity of the bottle shoulder forming template, the thickness of the gas cylinder mouth section, and the inner and outer surface quality of the gas cylinder shoulder all meet the design requirements;

[0087] ② The seamless steel liner of the gas cylinder adopts the heat treatment process of quenching + tempering. The temperature in the quenching furnace is set to 860-880℃, the temperature in the tempering furnace is set to 600-680℃, and the step time is 20-40min (the gas cylinders are manufactured in batches, and 30-50 cylinders can be selected for each batch, and heat treatment is carried out continuously, and each time a single cylinder enters the furnace. The step time refers to the interval time between the front and rear gas cylinders entering the heat treatment furnace); after the temperature of the seamless steel liner of the gas cylinder reaches 860-880℃ in the quenching furnace, it enters the quenching tank through the conveyor line and rotates itself at a speed of 20-30r / min. The quenching liquid is sprayed from the top to achieve the effect of rapid cooling. The roundness of the seamless steel liner after quenching and tempering heat treatment (that is, the difference between the maximum outer diameter and the minimum outer diameter on the same section) does not exceed 2% of the average outer diameter of the section, and the straightness does not exceed 0.15% of the total length; the metallographic structure is tempered troostite, and the grain size is ≥6. The metallographic diagram is shown in Appendix 2;

[0088] ③ Prepare epoxy resin glue in the proportion of epoxy resin: curing agent: defoamer: toughening agent: accelerator (mass ratio) = 100:90:1:15:1, and use the principle of small amounts and multiple times. No more than 5kg of epoxy resin should be prepared each time, and the glue should be fully stirred for no less than 3 minutes. This ratio can prevent air from being mixed into the epoxy resin and producing porous materials, reduce the brittleness of the pressure-bearing layer, increase toughness, improve bearing strength, and obtain good heat resistance, water resistance, and corrosion resistance. At the same time, the curing speed can be artificially controlled to ensure that there is sufficient time to complete the winding work.

[0089] ④ Connect the seamless steel liner (1) to the winding equipment, pour the glue into the glue tank, and introduce the carbon fiber through the glue tank into the winding head on the winding equipment. The number of carbon fibers is set to 24, and the preload force is 10N, ready for winding. Wind according to the set procedure and the number of carbon fibers. During winding, when the carbon fiber passes through the glue tank, the glue in the glue tank adheres to the carbon fiber and is wound around the bottle body. The rotation speed of the gas cylinder is 20r / min, and the forward speed of the trolley is: 9844mm / min. After the carbon fiber winding is completed, the joint is cut off to form a pressure-bearing layer.

[0090] ⑤ After passing the glass fiber through the glue groove, introduce it into the winding head on the winding equipment. The number of glass fibers is 24 and ready for winding. Wind according to the set program and the number of fibers. When winding, when the glass fiber passes through the glue groove, the glue in the glue groove adheres to the glass fiber and is wound on the bottle body together. The rotation speed of the gas cylinder is 20r / min, and the forward speed of the trolley is: 9844mm / min. Use a scraper to scrape off the excess glue to form a protective layer, and affix the gas cylinder label on the protective layer.

[0091] ⑥ Transfer the wrapped gas cylinder to the curing furnace for drying and curing. Pay attention to monitoring the curing temperature to prevent abnormal temperature (too high or too low).

[0092] ⑦ Connect the cured gas cylinder to the water jacket cover and connect it tightly. Apply the self-tightening pressure and maintain the pressure for 60 seconds. Apply the water pressure test pressure and maintain the pressure for 120 seconds. Calculate the total expansion, elastic expansion, and residual expansion rate. The residual expansion rate of the gas cylinder must be less than 5%. Transfer the qualified gas cylinder to the drying process.

[0093] ⑧ Turn the test bottle upside down to drain all the water in the cylinder and purge the inside of the cylinder with steam.

[0094] ⑨Clean glue residue, dirt and damage on the internal and external surfaces.

[0095] The above steps include hot spinning at both ends of the seamless steel pipe to form a bottle shoulder and a bottleneck, and then tempering heat treatment, internal and external thread processing, to manufacture a seamless steel liner that can be threadedly connected to the end plug, and then verify whether it is qualified through hardness testing, water pressure testing and non-destructive testing. High-strength carbon fiber is wound on the seamless steel liner, generally using a customized winding equipment, and the seamless steel liner is connected to the winding machine with the help of a special clamp. The key to the present invention is to use a large-diameter seamless steel liner, and the carbon fiber and epoxy resin are wound and cured to form a pressure-bearing layer, and the glass fiber and epoxy resin are wound and cured to form a protective layer. The initial winding spiral angle is not less than 60 degrees and the pre-tightening force of the high-strength fiber is applied. Combined with the uniform increase in the winding spiral angle and the positive and reverse alternating and cross-winding, the consistency of the stress state of the fibers between the layers during the inflation process can be more reasonably distributed, so that fewer fibers can achieve a more ideal reinforcement effect.

[0096] The large-diameter seamless steel liner hoop-wound gas cylinder manufactured using the above manufacturing steps includes a seamless steel liner with a hot-spun compression port, and a composite pressure-bearing layer formed by winding and curing the carbon fiber on the outer wall of the liner. The front end plug and the rear end plug are connected by means of the internal threads of the bottlenecks at both ends. The rear end plug is provided with an inlet and outlet valve and a sewage discharge device, and a safety discharge device is provided on the front or rear end plug. A protective layer is added outside the carbon fiber composite pressure-bearing layer in the present invention. The function of the protective layer is to prevent impact damage from cutting off the carbon fibers in the composite material reinforced pressure-bearing layer, thereby forming a local fatigue failure point, resulting in the failure of the entire composite material pressure-bearing layer to compensate for the pressure of the liner.

[0097] The large-volume steel liner annular carbon fiber wrapped gas cylinder is made of a large-diameter seamless steel pipe through spinning, heat treatment, thread processing and other processes to make the liner, so that it can withstand a bursting pressure of 1.25 times the nominal working pressure of the wrapped gas cylinder; the outer surface of the steel liner adopts high-strength carbon fiber to enhance the pressure-bearing capacity of the seamless steel liner, and the carbon fiber pressure-bearing layer must withstand a bursting pressure of 1.25 times the nominal working pressure of the wrapped gas cylinder. The combined winding process of orthogonal winding and cross winding is adopted, so that the carbon fiber can bear both radial stress and axial stress, and the force between each layer of carbon fiber in the winding is reasonably distributed. At the same time, the gaps between the carbon fibers are filled with epoxy resin. After the resin is cured, the orthogonal winding and cross winding carbon fibers become a whole, and the structural characteristics of correlation and consistency of mutual compensation are strengthened, so that the elastic deformation generated by the liner during repeated filling and discharge of high-pressure gas is strictly controlled within the theoretical specification value.

[0098] Figure 6 The present invention is a schematic diagram of the wrapped gas cylinder structure of the wrapped gas cylinder bundle container, which includes 9, a rear bottle stopper, 10, a steel liner, 11, a carbon fiber wrapped pressure-bearing layer, 12, a glass fiber wrapped protective layer, and 13, a front bottle stopper. A pressure-bearing layer is arranged outside the steel liner 10, and a protective layer is arranged outside the pressure-bearing layer. The pressure-bearing layer includes a carbon fiber wound pressure-bearing layer 11, and the protective layer includes a glass fiber wound protective layer 12. One section of the steel liner 10 is screwed and fixed to the front bottle stopper 13 through an internal thread, and the other end is screwed and fixed to the rear bottle stopper 9. The carbon fiber wound pressure-bearing layer 11 adopts a combined winding process of orthogonal winding and cross winding, so that the carbon fiber can bear both radial stress and axial stress, and strengthens the reasonable distribution of force between each layer of carbon fiber in the winding. At the same time, the gaps between the carbon fibers are filled with epoxy resin. After the resin is cured, the orthogonally wound and cross-wound carbon fibers become a whole, strengthening the structural characteristics of correlation and consistency of mutual compensation, so that the elastic deformation generated by the liner during repeated filling and discharge of high-pressure gas is strictly controlled within the theoretical specification value.

[0099] Figure 7-8The diagram is a schematic diagram of the connection between the wrapped gas cylinder and the rear end plate of the wrapped gas cylinder bundle container involved in the present invention and the schematic diagram of the connection between the wrapped gas cylinder and the front end plate of the wrapped gas cylinder bundle container. The diagram includes a rear end plate 1, a wrapped gas cylinder 5, a front end plate 6, a front connecting flange 7, a flange 14, a clamping block I 15, a clamping block II 16, and a container door 17. Fig.10 It is a schematic diagram of the flange structure of the wrapped gas cylinder tube bundle container involved in the present invention; Figure 11-12 The structure diagram of the clamping block I and the clamping block II of the wrapped gas cylinder tube bundle container involved in the present invention. The figure adopts a new type of anti-rotation structure of the high-pressure thin-walled gas storage cylinder to prevent the circumferential rotation and axial movement of the wrapped gas cylinder during transportation. Specifically, the two ends of the wrapped gas cylinder are respectively connected to the front connecting flange 7 and the anti-rotation combination flange 2, and the front connecting flange is connected to the front plate by bolts. The anti-rotation combination flange is composed of a flange 14, a clamping block I15, and a clamping block II16. The clamping block II16 is fastened to the flange 14 by hexagon socket bolts, and then the wrapped gas cylinder 5 is connected after fastening. After rotation, the clamping block I15 is fastened to the clamping block II16 by hexagon socket bolts, and then the flange 14 is fixed to the rear end plate 1 with bolts. The front end plate 6 is connected to the container-type box body by bolt connection; the rear end plate 1 is connected to the container-type box body by welding.

[0100] Fig. 9 The schematic diagram of the door structure of the bundle container of wrapped gas cylinders involved in the present invention. Side panels and movable shutters 3 are installed on the left and right sides and the bottom of the container-type frame, and a tarpaulin or a top plate 8 is installed on the upper end. The side panels and the tarpaulin form a closed box. The sides and the bottom of the bundle container are welded with 1.5mm steel plates, which can play a role of fireproof and waterproof. At the same time, it can also block the splashing of sand and gravel during transportation, which can effectively protect the gas cylinders from damage and extend the service life of the gas cylinders. The top of the bundle container adopts a 1.5mm steel top or a fireproof, waterproof and corrosion-resistant tarpaulin as a capping, which ensures that the wrapped gas cylinders are not affected by the splashing of sand and gravel from the top. The movable shutters installed on the side can accelerate the flow of internal air when the temperature inside the bundle container is high, so as to achieve rapid cooling.

[0101] The bundled container of the present invention adopts a large-volume steel liner with a lightweight and high volume-to-weight ratio, a carbon fiber-wrapped gas cylinder and a frame, which reduces the weight-to-volume ratio by 60% compared with a seamless steel gas cylinder. Under the premise of the same road load limit, the bundled container can be filled with more media. Taking the filling of hydrogen as an example, its total volume, filling mass and dead weight are shown in the table below.

[0102]

[0103] Total volume increased by 45.7%;

[0104] The mass of hydrogen loaded increased by 47.1%;

[0105] The weight has been reduced by 17%.

[0106] The tube bundle container of the present invention is a closed structure, with 1.5mm steel plates welded on the sides and bottom, which can play a role in fireproofing and waterproofing. At the same time, it can also block the splashing of sand and gravel during transportation, effectively protect the gas cylinders from damage, and extend the service life of the gas cylinders. The tube bundle container also uses a fireproof, waterproof and corrosion-resistant tarpaulin as the top, which can further reduce the overall weight. The movable shutters installed on the side can accelerate the flow of internal air when the temperature inside the tube bundle container is high, achieving rapid cooling. The flexible connection structure of the spiral pipeline is adopted between the pipeline and the bottle valve, and the pipeline system is more stable, and it can be guaranteed that no gas leakage occurs in the case of severe vibration.

[0107] Unless otherwise specified, the qualifiers similar to "first" and "second" appearing in this article do not refer to the limitation of time sequence, quantity, or importance, but are only used to distinguish one technical feature from another technical feature in the technical solution. Similarly, the qualifiers similar to "one" appearing in this article do not refer to the limitation of quantity, but describe the technical features that have not appeared in the previous text. Similarly, modifiers similar to "approximately" and "approximately" appearing before the numerals in this article usually include the number itself, and their specific meanings should be understood in conjunction with the context. Similarly, unless it is a noun modified by a specific quantitative quantifier, it should be regarded as including both singular and plural forms in this article, and the technical solution can include both the singular and plural technical features.

[0108] The preferred specific embodiments of the present invention are described in this specification. The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Any technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments according to the concept of the present invention should be within the scope of the present invention.

Claims

1. A wrapped gas cylinder tube bundle container, characterized in that: include: The front plate, the rear plate and 9 large-volume steel liner circumferential carbon fiber wrapped gas cylinders, the two ends of the wrapped gas cylinders are respectively connected to the front connection flange and the anti-rotation combination flange, the anti-rotation combination flange is composed of a flange, a clamping block I and a clamping block II, the clamping block II is fastened to the flange by a hexagon socket bolt, the wrapped gas cylinders are connected after fastening, and after rotation, the clamping block I is fastened to the clamping block II by a hexagon socket bolt, and then the flange is fixed to the rear plate with bolts; The large-volume steel liner hoop-shaped carbon fiber wrapped gas cylinder comprises a steel liner, a pressure-bearing layer and a protective layer, a front end plug and a rear end plug; The front end plug is connected to the rear end safety device, and the rear end plug is installed with a connecting pipeline; the gas cylinder can be filled with and discharged into the gas cylinder through the bottle plug, and the outer diameter of the inner liner of the large-volume steel liner hoop carbon fiber wrapped gas cylinder is 719mm; The total rated volume of the gas cylinders in the wrapped gas cylinder bundle container reaches 37m 3 .

2. The wrapped gas cylinder tube bundle container according to claim 1, characterized in that: The connecting pipeline adopts a flexible connecting structure.

3. The wrapped gas cylinder tube bundle container according to claim 2, characterized in that: The flexible connection structure is a spiral structure.

4. The wrapped gas cylinder tube bundle container according to claim 2, characterized in that: A protective layer is also arranged outside the flexible connection structure, and the protective layer is made of rubber material.

5. The wrapped gas cylinder tube bundle container according to claim 2, characterized in that: The flexible connection structure is a connection pipe with a plurality of folds on its surface.

6. The wrapped gas cylinder tube bundle container according to claim 3, characterized in that: The spiral structure comprises spaced spiral protrusions and spiral grooves, and the spiral protrusions fit together when the spiral grooves are contracted and folded.

7. A wrapped gas cylinder tube bundle container according to any one of claims 1 to 6, characterized in that: The large-volume steel liner annular carbon fiber wrapped gas cylinder comprises: a steel liner, a pressure-bearing layer is arranged outside the steel liner, a protective layer is arranged outside the pressure-bearing layer, the pressure-bearing layer comprises a carbon fiber wrapped pressure-bearing layer, the protective layer comprises a glass fiber wrapped protective layer, one end of the steel liner is screwed and fixed to the front end cover through an internal thread, and the other end is screwed and fixed to the rear end cover, wherein the carbon fiber wrapped pressure-bearing layer adopts a combined winding process of orthogonal winding and cross winding, so that the carbon fiber can bear both radial stress and axial stress; the roundness of the steel liner is the difference between the maximum outer diameter and the minimum outer diameter on the same cross section, and the roundness of the steel liner does not exceed 2% of the average outer diameter of the cross section; the straightness of the steel liner does not exceed 0.15% of the total length of the steel liner.

8. The wrapped gas cylinder tube bundle container according to claim 7, characterized in that: The carbon fiber wrapped gas cylinder has a winding spiral angle that is uniformly enlarged, and the winding method is forward and reverse alternating and cross winding.

9. A wrapped gas cylinder tube bundle container according to any one of claims 1 to 6, characterized in that: The sides and bottom of the tube bundle container are welded with 1.5mm steel plates, the top of the tube bundle container adopts a 1.5mm steel top or a fireproof, waterproof and corrosion-resistant tarpaulin as a capping, and movable shutters are installed on the sides of the tube bundle container.

10. The wrapped gas cylinder tube bundle container according to claim 8, characterized in that: The steel liner is heat treated by a rotary spraying process, and the metallographic structure after the heat treatment is tempered troostite, and the grain size is ≥6 levels.

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