CN218819614U - Composite forming hydrogen storage container for 99MPa grade hydrogenation station - Google Patents
Composite forming hydrogen storage container for 99MPa grade hydrogenation station Download PDFInfo
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- CN218819614U CN218819614U CN202221978087.6U CN202221978087U CN218819614U CN 218819614 U CN218819614 U CN 218819614U CN 202221978087 U CN202221978087 U CN 202221978087U CN 218819614 U CN218819614 U CN 218819614U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
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Abstract
The utility model discloses a hydrogen storage container is used at 99MPa level hydrogenation station of composite forming, pass through fibre envelope and thermosetting resin curing moulding including steel inside lining and its surface, increase structural strength's composite bed, the shaft section wall thickness of this steel inside lining is even and from shaft both ends edge to bottleneck gradual change bodiness, and the composite bed only takes shape in the shaft section and the bottle shoulder circular arc transition section surface of steel inside lining, this composite bed is established to polyester surfacing mat by interior and table in proper order, first glass fiber layer, the hoop winding is mingled with reinforcing fiber layer and the second glass fiber layer of vertical reinforcement. The hydrogen storage container optimizes the wall thickness specification and performance stability of the steel lining, and is based on partial winding of the surface of the non-whole gas cylinder, so that the exertion rate of the fiber strength is improved, the fiber strength is improved by times, and the volume of the finished product container can reach more than 500L and the pressure bearing can reach 100MPa.
Description
Technical Field
The utility model relates to a large capacity high pressure gas storage equipment especially relates to a more than 500L, 99MPa level hydrogenation station uses compound shell structure of hoop winding of hydrogen storage container.
Background
At present, the global double-carbon plan of 'carbon neutralization' and 'carbon standard reaching' is implemented, so that the development of new energy technology is promoted; the development of hydrogen energy is a global consensus, and particularly in the direction of technical breakthrough of hydrogen energy sources, hydrogen storage containers are developed towards large volume and high volume pressure.
The high-pressure hydrogen storage is a main hydrogen storage mode of a hydrogen station, the hydrogen station is divided into 35MPa and 70MPa according to the filling pressure of hydrogen, most domestic hydrogen stations for use and reconstruction are 35MPa, the general design pressure of a hydrogen storage container is 50MPa, and the structure is manufactured by a single-layer spinning seamless steel tube.
The design pressure of the domestic 99 MPa-level hydrogen storage container for the station is generally 87.5MPa, 98MPa and 103MPa, and stainless steel multi-layer wrapped containers are generally adopted, such as a steel belt staggered winding type container and a laminate wrapped type container, and a single-layer spinning seamless steel pipe manufacturing and steel lining carbon fiber full-spiral winding structure and the like are also explored.
The existing stainless steel multilayer binding, welding and forming manufacturing method has the problems of low mechanical automation degree, low product quality consistency and the like, and the batch production efficiency is low; and if a 100MPa hydrogen storage container is manufactured by spinning a single-layer spinning seamless steel pipe, the volume of the container and the bearing capacity of the container need to be increased, and the wall thickness of the designed container is very thick, thereby bringing a series of technical problems. The technical bottleneck is the homogenization problem in the rolling process of the large-volume seamless steel tube, and the heat treatment equipment and the process cannot completely ensure the full quenching in the thickness direction of the steel cylinder, so that the crack is rapidly expanded in the hydrogen environment, and the hydrogen embrittlement phenomenon is easily caused; the difficulty of the hot spinning process of the spinning equipment is increased, so that the structure provides more challenges for the processing capacity of large-scale equipment.
If the steel lining fiber spiral full winding mode is adopted for manufacturing, although the problems in the aspects of steel lining materials and processes are solved, the equipment requirement for full winding of the large-volume hydrogen storage container is high, and the efficiency is very low because the time for winding 1 container of 500L-1000L exceeds 6 hours. Due to the fact that the winding time is too long, the used resin system is prone to abnormal curing in the winding process, and the manufacturing quality of products is affected.
Disclosure of Invention
In view of the above-mentioned needs of the prior art, the present invention aims to provide a hydrogen storage container for a composite forming 99MPa grade hydrogenation station to improve the volume, volume-to-weight ratio and pressure-bearing capacity of the gas cylinder product.
The utility model discloses realize above-mentioned purpose's technical solution is, a hydrogen storage container for 99MPa level hydrogenation station of composite forming, pass through fibrous envelope and thermosetting resin solidification shaping, increase structural strength's composite bed, its characterized in that including steel inside lining and its surface: the wall thickness of the barrel body section of the steel lining is uniform, the barrel body section of the steel lining is gradually thickened from the edges of the two ends of the barrel body to the bottle mouth, the composite layer is only formed on the surfaces of the barrel body section and the circular arc transition section of the bottle shoulder of the steel lining, and the composite layer is sequentially provided with a polyester surface felt, a first glass fiber layer, a reinforcing fiber layer which is annularly wound and mingled with longitudinal reinforcement and a second glass fiber layer from the inside to the outside.
In the hydrogen storage container for the 99MPa grade hydrogenation station formed by composite forming, the polyester surfacing mat is spirally and annularly wound and fully covers the forming position of the steel lining corresponding to the composite layer, and the overlapping width of the spiral lap joint of the polyester surfacing mat is 10-20mm.
In the hydrogen storage container for the 99MPa grade hydrogenation station formed by composite molding, the first glass fiber layer is an isolation inner layer formed by circularly winding glass fibers dipped by thermosetting resin between bottle shoulders on two sides of the steel lining in a reciprocating manner.
The hydrogen storage container for the 99 MPa-level hydrogenation station is formed in a composite mode, the reinforced fiber layer comprises a circumferential fiber layer formed by fiber composites in a reciprocating and circumferential winding mode within the coverage range smaller than that of the first glass fiber layer and a longitudinal reinforcing layer which is overlapped in the circumferential fiber layer in a layered mode and wraps the barrel body section completely through fiber composite unidirectional cloth, and the thickness of the reinforced fiber layer accounts for 60% -90% of the total thickness of the composite layer.
The hydrogen storage container for the 99 MPa-grade hydrogenation station is formed by compounding, and further, the fiber composite material is one or combination of carbon fiber, glass fiber, aramid fiber or basalt fiber.
In the hydrogen storage container for the 99 MPa-level hydrogenation station formed by the composite forming, furthermore, the enveloping range of the annular fiber layer exceeds the barrel body section, and a reinforcing section thickened towards two ends in a stepped manner is formed at the position close to the bottle shoulder.
In the hydrogen storage container for the 99MPa grade hydrogenation station formed by composite molding, the second glass fiber layer is a protective layer formed by winding the glass fiber dipped by thermosetting resin in the circumferential direction in a reciprocating manner within the coverage range of the first glass fiber layer, and the protective layer completely covers the reinforced fiber layer.
According to the hydrogen storage container for the 99 MPa-grade hydrogenation station formed by composite molding, the surface of the composite layer is uniformly coated with ultraviolet-corrosion-resistant light-cured resin.
Use the utility model discloses a technical solution of this composite forming hydrogen storage container, its technological effect who brings:
1) Compared with a single-layer steel hydrogenation container, the steel lining fiber composite material hoop-wound hydrogen storage container can reduce the wall thickness by 40 percent, improve the consistency and the stability of the heat treatment performance of the steel lining and the hydrogen storage capacity under the same overall dimension, and is more favorable for greatly reducing the crack propagation speed of the steel lining in the hydrogen environment.
2) And the steel lining is wound annularly by the fiber composite material, so that the strength exertion rate of the traditional fully-wound fiber is improved, the fiber strength exertion rate is improved by times, and the quality and the stability of a finished product of the hydrogen storage container are improved.
Drawings
Fig. 1 is a schematic diagram of a central axial-sectional structure of the hydrogen storage container for the hydrogen station of the present invention.
FIG. 2 is a partially enlarged schematic view of the upper right corner of the hydrogen storage vessel shown in FIG. 1.
Detailed Description
The following detailed description is made of the specific implementation structure of the present invention with reference to the drawings, so that the technical solution of the present invention is easier to understand and grasp, thereby making a clearer definition of the protection scope of the present invention.
The utility model discloses plan and optimize composite construction to improve volume, volume-to-weight ratio and the bearing capacity of gas cylinder product, obtain more than 500L, design pressure is close 100 MPa's steel inside lining hydrogen storage container, can be used to 99MPa level hydrogenation station to carry out high pressure steady state and store hydrogen.
As shown in fig. 1 and fig. 2, it is a schematic view of the center sectional structure and a partially enlarged detail structure of the finished hydrogen storage cylinder according to the preferred embodiment of the present invention. The hydrogen storage container for the 99 MPa-level hydrogenation station formed by composite forming comprises a steel lining 1 and a composite layer 2, wherein the surface of the steel lining is formed by fiber enveloping and thermosetting resin curing, and the structural strength is increased. The key technical innovation is as follows: the wall thickness of the barrel section 11 of the steel lining 1 is uniform, and gradually changes from the edges of the two ends of the barrel to the bottle shoulder 12 and the bottle mouth 13, the composite layer 2 is only formed on the surfaces of the barrel section 11 of the steel lining and the circular arc transition section 12a of the bottle shoulder, and the composite layer 2 is sequentially provided with a polyester surface felt 21, a first glass fiber layer 22, a reinforced fiber layer 23 which is circumferentially wound and mingled with longitudinal reinforcement and a second glass fiber layer 24 from the inside to the outside.
The structural optimization is concretely understood from two aspects by combining the figure, and on one hand, the steel lining is made of the material of 4130X Cr-Mo steel with good compatibility with hydrogen, and the steel lining has the advantages of high strength, good toughness and hydrogen embrittlement resistance. The dimensions of the spun steel liner are 485mm diameter, 4000mm length and 500L volume, as shown in FIG. 1, the steel liner is formed to a uniform wall thickness d of barrel 11 by process modification 1 And gradually thicken from the arc transition sections of the edges of the two ends of the cylinder body and the bottle shoulder, and the average wall thickness at the bottle shoulder is d 2 And d is d 2 ＞d 1 . The principles that can be confirmed by such design and improvement are: firstly, because the length of the hydrogen storage container for the station is longer, the length size of the bottle mouth and the bottle shoulder is less than the length of the cylinder body section by more than a little, so that the reduction of the wall thickness of the cylinder body section is inevitably more practical than the reduction of the wall thickness of the bottle shoulder and the bottle mouthThe weight reduction ratio is larger. Secondly, in order to ensure the pressure-bearing capacity of the hydrogen storage container, the wall thickness and the pressure-bearing level are in a proportional corresponding relationship. For the barrel section of the hydrogen storage vessel, the wall thickness of the liner needs to be set uniformly to avoid the occurrence of concentrated pressure accumulation, so as to meet the design requirement on the strength of the hydrogen storage vessel.
The two aspects relate to a composite layer formed by enveloping and curing a steel lining. The composite layer is mainly used for compounding the cylinder body section and slightly covering the arc transition section of the bottle shoulder; instead, the layers basically have a spiral circumferential winding structure (hereinafter referred to as "loop winding"). The principles that can be confirmed by such design and improvement are: firstly, the surface area of the bottle body compounded by winding fibers is reduced, and the using amount of fiber materials can be obviously reduced on the premise of equal forming thickness; furthermore, the prior disclosed full winding is a longitudinal fiber layer formed by reciprocating longitudinal winding, and in order to comply with the requirement of arc cladding antiskid of the bottle shoulder transition section, the longitudinal winding needs to have a certain inclination angle, usually 48-65 degrees, and the inclination angle inevitably brings the discount of fiber strength exertion, and the strength can only be compensated by increasing the number of winding layers. Finally, because the length of the hydrogen storage container for the large-volume station is longer, in order to reduce the overlarge deflection and cause the overlarge bending moment to be borne by the composite material, a plurality of layers of fiber composite unidirectional cloth are laid in the straight line section of the whole cylinder body in the composite layer, so that the longitudinal rigidity of the composite layer is enhanced, and the composite layer is prevented from cracking in the long-term use process.
From the further refinement feature of the composite layer, the polyester surfacing mat 21 is spirally and annularly wound and fully covers the steel lining at the position corresponding to the composite layer, and the overlapping width of the spiral lap joint of the polyester surfacing mat is 10 to 20mm. The paving range of the polyester surfacing mat is larger than the preset winding range of the fiber composite material (preferably made of carbon fiber), so that the polyester surfacing mat is more favorable for transferring load from the steel lining to the composite layer, and has the function of preventing electrochemical corrosion.
In order to prevent the fiber composite material from directly contacting with the surface of the bottle body to cause electrochemical corrosion, the first glass fiber layer 22 is an isolation inner layer formed by circularly winding glass fibers dipped by thermosetting resin between bottle shoulders on two sides of the steel lining in a reciprocating manner, and the polyester surface felt is uniformly covered. The lay-up range of the first glass fibre layer defines the forming dimension of the entire composite layer and is about 5mm longer than the winding range of the carbon fibres.
The reinforced fiber layer 23 comprises a circumferential fiber layer 231 formed by fiber composite materials in a reciprocating circumferential winding mode within a range smaller than the coverage range of the first glass fiber layer and a longitudinal reinforcing layer 232 which is overlapped in the circumferential fiber layer 231 in a layering mode and wraps the barrel section completely with fiber composite material unidirectional cloth, and the thickness of the reinforced fiber layer accounts for 60% -90% of the total thickness of the composite layer. Here, the fiber composite material is one or a combination of carbon fiber, glass fiber, aramid fiber, and basalt fiber, and preferably, a carbon fiber yarn wound in a plurality of strands is used. The enveloping range of the annular fiber layer 231 exceeds the barrel body section 11, and a reinforcing section 231a which is thickened towards two ends in a stepped manner is formed near the bottle shoulder, so that the weak point of the finished container is transferred to the middle section of the barrel body from the transition section near the bottle shoulder.
The second glass fiber layer 24 is a protective layer formed by winding glass fibers impregnated with thermosetting resin in a circumferential direction in a reciprocating manner within the coverage range of the first glass fiber layer. Corresponding to the actual winding shaping appearance of above-mentioned reinforcing fiber layer under the actual conditions, the winding width self preservation protective layer of this second glass fiber layer is crescent to keeping apart the inlayer, and the protective layer covers the reinforcing fiber layer completely for prevent the probably performance of colliding with, rubbing and colliding with of handling, use in, avoid destroying the reinforcing fiber layer.
In addition to the optimization and improvement of the composite layer structure, the ultraviolet corrosion resistant light-cured resin 25 can be uniformly coated on the surface of the composite layer after the composite layer is cured, molded, tested and surface modified in consideration of the need of preventing the ultraviolet corrosion from degrading and damaging the composite layer and influencing the performance when the hydrogen storage container is actually transported and used outdoors.
In summary, the detailed description of the hydrogen storage container for the 99MPa grade hydrogen station of the present invention in combination with the illustrated embodiment can be seen, and the present solution has substantial characteristics and progressiveness, which are described as follows.
1) Compared with a single-layer steel hydrogenation container, the steel lining fiber composite material hoop-wound hydrogen storage container can reduce the wall thickness by 40 percent, improve the consistency and the stability of the heat treatment performance of the steel lining and the hydrogen storage capacity under the same overall dimension, and is more favorable for greatly reducing the crack propagation speed of the steel lining in the hydrogen environment.
2) The steel lining is wound annularly by the fiber composite material, so that the strength exertion rate of the traditional fully-wound fiber is improved, the fiber strength exertion rate is improved exponentially, and the quality and the stability of a finished product of the hydrogen storage container are improved.
In addition to the above embodiments, the present invention may have other embodiments, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of the present invention.
Claims (7)
1. The utility model provides a hydrogen storage container for 99MPa level hydrogenation station of composite forming, includes steel inside lining and its surface through the fiber envelope and thermosetting resin solidification shaping, increases the composite bed of structural strength which characterized in that: the wall thickness of the barrel body section of the steel lining is uniform, the barrel body section of the steel lining is gradually thickened from the edges of the two ends of the barrel body to the bottle mouth, the composite layer is only formed on the surfaces of the barrel body section and the circular arc transition section of the bottle shoulder of the steel lining, and the composite layer is sequentially arranged into a polyester surface felt, a first glass fiber layer, a reinforcing fiber layer which is annularly wound and mixed with longitudinal reinforcement and a second glass fiber layer from the inner surface to the outer surface.
2. The composite formed hydrogen storage container for a 99MPa grade hydrogen station according to claim 1, wherein: the polyester surface felt is spirally and annularly wound and is fully covered on the steel lining at a position corresponding to the forming position of the composite layer, and the overlapping width of the spiral lap joint of the polyester surface felt is 10-20mm.
3. The composite formed hydrogen storage container for a 99MPa grade hydrogen station according to claim 1, wherein: the first glass fiber layer is an isolation inner layer formed by winding glass fibers dipped by thermosetting resin between bottle shoulders on two sides of the steel lining in a reciprocating and circumferential mode.
4. The composite formed hydrogen storage container for a 99MPa grade hydrogen station according to claim 1, wherein: the reinforced fiber layer comprises a circumferential fiber layer formed by fiber composite materials in a reciprocating circumferential winding mode within the coverage range smaller than that of the first glass fiber layer and a longitudinal reinforcing layer which is overlapped in the circumferential fiber layer in a layering mode and is used for fully wrapping the barrel body section through fiber composite material unidirectional cloth, and the thickness of the reinforced fiber layer accounts for 60% -90% of the total thickness of the composite layer.
5. The hydrogen storage container for a composite forming 99MPa grade hydrogenation station according to claim 4, characterized in that: the enveloping range of the annular fiber layer exceeds the barrel body section, and the reinforcing section thickened towards two ends in a stepped manner is formed at the position close to the bottle shoulder.
6. The composite formed hydrogen storage container for a 99MPa grade hydrogen station according to claim 1, wherein: the second glass fiber layer is a protective layer formed by winding glass fibers dipped by thermosetting resin in a reciprocating mode in the circumferential direction within the coverage range of the first glass fiber layer, and the protective layer completely covers the reinforcing fiber layer.
7. The composite formed hydrogen storage container for a 99MPa grade hydrogen station according to claim 1, wherein: and the surface of the composite layer is uniformly coated with ultraviolet corrosion resistant light-cured resin.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221978087.6U CN218819614U (en) | 2022-07-29 | 2022-07-29 | Composite forming hydrogen storage container for 99MPa grade hydrogenation station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221978087.6U CN218819614U (en) | 2022-07-29 | 2022-07-29 | Composite forming hydrogen storage container for 99MPa grade hydrogenation station |
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| CN218819614U true CN218819614U (en) | 2023-04-07 |
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| CN202221978087.6U Active CN218819614U (en) | 2022-07-29 | 2022-07-29 | Composite forming hydrogen storage container for 99MPa grade hydrogenation station |
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- 2022-07-29 CN CN202221978087.6U patent/CN218819614U/en active Active
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