CN117489969A

CN117489969A - Hydrogen storage cylinder

Info

Publication number: CN117489969A
Application number: CN202311539401.XA
Authority: CN
Inventors: 魏纪宝; 赵亮; 公歆汝; 吕振才; 袁国红; 刘万金
Original assignee: Beijing Chinatank Industry Co ltd
Current assignee: Beijing Chinatank Industry Co ltd
Priority date: 2023-11-17
Filing date: 2023-11-17
Publication date: 2024-02-02

Abstract

The application provides a hydrogen storage cylinder, which comprises a cylinder liner and a cylinder valve seat; the gas cylinder liner comprises a liner body, the liner body is provided with a first end and a second end along the axis direction, the first end and/or the second end are provided with openings, both ends of the liner body along the axis direction are provided with a cylinder valve seat, and the cylinder valve seat covers the openings and/or the liner body; the gas cylinder liner also comprises a reinforcing piece, and the reinforcing piece is buried in the liner body; wherein, the liner body adopts rotational molding mode and reinforcement piece integrated into one piece. The reinforcing piece is embedded in the gas cylinder liner in the application, so that the overall strength of the liner is effectively increased, and the problems of collapse, warping and separation with a fiber layer of the liner due to the effect of the fiber layer are solved.

Description

Hydrogen storage cylinder

Technical Field

The application relates to the technical field of hydrogen storage, in particular to a hydrogen storage cylinder.

Background

The hydrogen can be applied in a variety of fields due to the nature of the present application. For example, hydrogen can be used as a reducing agent instead of carbon for metal smelting, hydrogen can also be used for optical fiber production, metal cutting and welding, hydrogen fuel cell automobiles, distributed power generation and the like.

The hydrogen fuel cell automobile is a novel power mode automobile which is rapidly developed in recent years, and only water vapor is generated by hydrogen combustion to be discharged, so that zero emission and no pollution in the true sense can be realized. The hydrogen storage is mainly realized by adopting a gas cylinder, so that the hydrogen storage is convenient to store, transport and use, but the part of the liner of the hydrogen storage cylinder is made of plastic, the fiber layer is wound on the outer side of the liner, the liner has lower strength, and under the action of the fiber layer, the liner is easy to collapse, warp and separate from the fiber layer, so-called external pressure instability occurs, and potential safety hazards or hydrogen loss occurs.

In the related art, in order to solve the problem of instability of external pressure of the inner container of the hydrogen storage cylinder, when the winding fiber layer is solidified, gas with certain pressure is filled in the hydrogen storage cylinder. However, this approach adds to the complexity of the process and requires specialized equipment and tooling. And the pressure forming of the hydrogen storage cylinder also increases the risk of the forming process.

When the hydrogen storage bottle is used, the internal gas can not be completely discharged, and a certain amount of gas needs to be reserved to balance the internal pressure and the external pressure. If the operation is improper, the gas is completely discharged, and when the gas is inflated again, a gap is formed between the liner and the fiber layer, so that potential safety hazards exist.

Disclosure of Invention

To overcome the problems in the related art, the present application provides a hydrogen storage cylinder.

According to a first aspect of embodiments of the present application, there is provided a hydrogen storage cylinder, including a cylinder liner and a cylinder valve seat; the gas cylinder liner comprises a liner body, wherein the liner body is provided with a first end and a second end along the axial direction of the liner body, the first end and/or the second end is/are provided with an opening, two ends of the liner body along the axial direction of the liner body are provided with a cylinder valve seat, and the cylinder valve seat covers the opening and/or the liner body;

the gas cylinder liner further comprises a reinforcing piece, and the reinforcing piece is buried in the liner body; wherein, the courage body with reinforcement piece integrated into one piece.

Optionally, the reinforcement member includes a plurality of mesh frames woven from reinforcement filaments.

In one embodiment, the mesh in the net rack includes, but is not limited to, triangular, hexagonal, diamond, rectangular, for example.

Optionally, the mesh frame at the middle region has a weave density less than or equal to a weave density of the mesh frame at the two side regions.

Optionally, the reinforcement further comprises an annular wire mesh connected with the grid; wherein, both sides of rack all are provided with one annular silk screen, just annular silk screen's weaving density is greater than the weaving density of rack.

Optionally, the net frame located in the two side areas is provided with a spike structure, and the spike structure is connected with the bottle valve seat and/or the liner body.

Optionally, the braiding density of the net rack is matched with the diameter of the hydrogen storage cylinder.

Optionally, the two sides of the reinforcement piece along the axial direction of the liner body are respectively provided with a first connecting support leg, and the first connecting support legs are connected with the corresponding bottle valve seats; the first connecting support leg protrudes out of the surface of the liner body.

Optionally, the first connection leg has a preset included angle with the tangential direction of the liner body.

Optionally, the size of the preset included angle is matched with the knitting density of the net rack.

Optionally, the bottle valve seat is provided with a groove, and the first connecting leg is mounted in the groove.

Optionally, the first end and the second end are both provided with the opening, the opening is provided with a bending section relative to the liner body, the connection part between the bending section and the liner body is arc-shaped, the curvature radius is 1/3-1/4 of the radius of the liner body, and the arc length is 1/6-1/4 of the circumference of the liner body.

Optionally, the hydrogen storage cylinder further comprises a fiber layer, and the fiber layer is sleeved on the circumferential outer side wall of the cylinder liner.

Optionally, the hydrogen storage cylinder is provided with two ligature areas, the ligature area is followed the circumference ring of hydrogen storage cylinder is established.

In one embodiment, the temperature of the container body and the reinforcing piece is 180-230 ℃ and the molding time is 15-30 minutes _。

The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: the reinforcing piece is embedded in the gas cylinder liner, so that the overall strength of the liner is effectively increased, and the problems of collapse, warping and separation of the liner and the fiber layer caused by the action of the fiber layer are solved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a partial cross-sectional view of a hydrogen storage cylinder disclosed in an embodiment of the present application;

FIG. 2 is a schematic view of the reinforcement structure of the hydrogen storage cylinder disclosed in the embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of a hydrogen storage cylinder as disclosed in an embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of a hydrogen storage cylinder disclosed in an embodiment of the present application;

FIG. 5 is a schematic view of a hydrogen cartridge as disclosed in an embodiment of the present application;

FIG. 6 shows a net rack effect graph when net holes of the net rack are diamond-shaped in the application;

FIG. 7 is a schematic view showing a binding area of the hydrogen cylinders of the present application;

fig. 8 shows a schematic view of a recess provided in the cylinder valve seat of the hydrogen storage cylinder of the present application.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application and not to limit the scope of the application, which may be embodied in many different forms and not limited to the specific embodiments disclosed herein, but rather to include all technical solutions falling within the scope of the claims.

These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.

In the description of the present application, unless otherwise indicated, the meaning of "plurality" is greater than or equal to two; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. When the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.

Furthermore, the terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements.

It should also be noted that, in the description of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art. When a particular device is described as being located between a first device and a second device, there may or may not be an intervening device between the particular device and either the first device or the second device.

All terms used herein have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.

The application provides a hydrogen storage cylinder, which comprises a cylinder liner and a cylinder valve seat; the gas cylinder liner comprises a liner body, the liner body is provided with a first end and a second end along the axis direction, the first end and/or the second end is provided with an opening, both ends of the liner body along the axis direction are provided with cylinder valve seats, and the cylinder valve seats cover the opening and/or the liner body; the gas cylinder liner also comprises a reinforcing piece, and the reinforcing piece is buried in the liner body; wherein, the courage body and reinforcement piece integrated into one piece. The reinforcing piece is embedded in the gas cylinder liner in the application, so that the overall strength of the liner is effectively increased, and the problems of collapse, warping and separation with a fiber layer of the liner due to the effect of the fiber layer are solved.

In one exemplary embodiment, as shown in fig. 1-3, a hydrogen storage cylinder includes a cylinder liner 1 and a cylinder valve seat 2. In one embodiment, the hydrogen storage cylinder has a plastic liner suitable for 70 MPa.

The gas cylinder liner 1 is cylindrical, the gas cylinder liner 1 comprises a liner body 11, and the liner body 11 is made of stainless steel materials or aluminum alloy materials, and can also be made of plastics; wherein, the nickel content in the stainless steel material is more than or equal to 12 percent so as to improve the strength of the liner 11.

The bladder 11 has a first end 111 and a second end 112 along its axis. Wherein the first end 111 may be provided with an opening 13 and the second end 112 may be provided with an opening 13. The opening 13 may be provided as a single-ended opening or as a double-ended opening, and may be specifically determined based on the actual situation such as the volume of the hydrogen storage cylinder.

The two ends of the liner body 1 along the axis direction are provided with the bottle valve seats 2 (in the specific embodiment, the two ends of the liner body 1 along the axis direction are provided with one bottle valve seat 2), when the opening 13 is single-ended, for example, the first end 111 is provided with the opening 13, the second end 112 is a closed plane, one bottle valve seat 2 is connected with the opening 13 of the first end 111, and the other bottle valve seat 2 covers the closed plane of the liner body 11. When both ends are opened 13, the bottle valve seat 2 may be connected with the openings 13, respectively.

The gas cylinder liner 1 further comprises a reinforcing piece 12, and the reinforcing piece 12 is buried in the liner body 11 to increase the strength of the gas cylinder liner 1. In a specific embodiment, the liner 11 is integrally formed with the reinforcing member 12 by rotational molding.

Illustratively, the plastic powder is filled into a mold to form an inner liner, the reinforcing member 12 is laid on the inner liner, and the outer liner is molded by rotational molding, thereby realizing the embedding of the reinforcing member 12.

The reinforcing member 12 includes, for example, a net frame woven from a plurality of reinforcing filaments, and is embedded in the entire liner 11. The reinforcing piece 12 can be made of aluminum alloy or stainless steel materials, wherein the nickel content in the stainless steel materials is more than or equal to 12%, so that the integral strength of the gas cylinder liner 1 is effectively improved, and the problems of collapse, warping and separation from a fiber layer of the gas cylinder liner due to the effect of the fiber layer are solved.

The woven net rack is fixed in a cavity mold of the gas cylinder liner 1, the woven net rack is coated by plastic melting by adopting a rotational molding process, and the woven net rack is embedded in a plastic layer of the gas cylinder liner 1, so that the effect of enhancing the strength of the gas cylinder liner 1 is realized.

In one embodiment, the liner body of the gas cylinder liner in the present application has more than one liner structure, such as including a multi-layer liner structure (e.g., liner body 11 has the liner and the outer liner in the above embodiments); the stiffening member may also be a multi-layered structure, such as the stiffening member 12 comprising a multi-layered net frame.

In one embodiment, the mesh openings in the net rack may be, for example, any of triangular, hexagonal, diamond, rectangular, and square. For example, when the mesh is triangular, the mesh can be equilateral triangle, so that the stress of the net rack is relatively uniform. FIG. 2 is a schematic view showing the structure of a reinforcement member of a hydrogen storage cylinder according to an embodiment of the present application, wherein the mesh of the net rack in FIG. 2 is square; fig. 6 shows a net rack effect diagram when the net holes are diamond.

Illustratively, the weave density of the mesh frame at the middle region is less than or equal to the weave density of the mesh frame at the two side regions; or, the reinforcement still includes the annular wire netting (not shown in the figure) of being connected with the rack, and the both sides of rack all are provided with an annular wire netting, and the weaving density of annular wire netting is greater than the weaving density of rack for the mesh clearance that is located both ends diminishes, has effectively strengthened the local intensity of gas cylinder inner bag 1. Here, the rack located in the middle area means a middle area portion of the rack.

In one embodiment, the weave density of the net rack is adapted to the diameter of the hydrogen storage cylinder. For example, if the diameter of the hydrogen storage cylinder is smaller than a predetermined value or satisfies a first predetermined value range, the braid density of the net rack is small; if the diameter of the hydrogen storage cylinder is greater than a predetermined value or a second predetermined range of values is satisfied, the braid density of the net rack is large.

In one embodiment, the racks in the two side areas are provided with spike structures (not shown) which are connected to the bottle valve seat 2 and/or the liner 11, so that the connection becomes more reliable. And the net rack can be provided with local napping, the napping degree can be changed, and the actual situation is taken as a reference, so that the bottle body management of the whole gas bottle liner 1 tends to be balanced, and is not easy to split. Here, the grid at the two side regions means the two side region portions of the grid.

In this embodiment, as shown in fig. 1-5, the reinforcement member 12 further includes two first connection legs 122, and along the axial direction of the container body (refer to the X-axis shown in fig. 1), the two first connection legs 122 are disposed on two sides of the reinforcement member 12, the first connection legs 122 are connected to the corresponding bottle valve seat 2, and the first connection legs 122 protrude from the surface of the container body 11.

The first connection leg 122 may also be made of a steel material to improve the strength of the first connection leg 122 thereof. The first connecting leg 122 provides a connection location for connection to other components.

In one embodiment, the mesh angles of the mesh frame are sized to match the weave density of the mesh frame. For example, fig. 2 shows grid angle a of the grid, which is greater than a predetermined threshold (e.g., greater than 90 degrees) if the circumferential density of the grid is large, and less than a predetermined threshold (e.g., less than 90 degrees) if the axial density of the grid is large. For another example, the mesh included angle A of the net rack is generally controlled to be 10-170 degrees, and when the mesh included angle A of the net rack is 10-90 degrees, the axial braiding density of the net rack is greater than the circumferential braiding density of the net rack, namely, the net rack is suitable for an elongated gas cylinder liner at the moment; when the grid included angle A of the grid frame is 90-170 degrees, the axial weaving density of the grid frame is larger than the circumferential weaving density of the grid frame, namely, the grid frame is suitable for the short and thick metal gas cylinder liner.

In this embodiment, as shown in fig. 1 to 5, the cylinder valve seat 2 is provided with a groove 21, and the first connecting leg 122 is installed in the groove 21 to increase the roughness of the connecting surface of the cylinder valve seat 2, thereby enhancing the connection strength of the cylinder valve seat 2 and the cylinder liner 1. Through setting up the recess for the right angle card of reinforcement is wherein, has avoided the silk screen of rack to take place to rock. Figure 8 shows in particular the grooves 21 provided.

In this embodiment, as shown in fig. 1-5, the first end 111 and the second end 112 are both provided with an opening 13, a bending section 114 is arranged at the position of the opening 13 relative to the liner 11, the connection between the bending section 114 and the liner 11 is arc-shaped, the curvature radius is 1/3-1/4 of the radius of the liner 11, the arc length is 1/6-1/4 of the circumference of the liner 11, and the liner is not easy to burst, thereby realizing the maximum bearing.

The opening 13 is cylindrical, for example, the cylinder valve seat 2 is cylindrical, is hollow along the axial direction, can be sleeved on the bending section 114, and is communicated with the opening 13 of the cylinder liner 1. The hollow structure facilitates the sensor to extend into the gas cylinder liner 1, and corresponding functions are realized.

In this embodiment, as shown in fig. 1 to 5, the hydrogen storage cylinder further includes a fiber layer 3, where the fiber layer 3 is sleeved on the circumferential outer side wall of the cylinder liner 1, so as to wind the outer surface of the cylinder liner 1. The fiber layer is for example a carbon fiber winding layer, cooperates with the reinforcement piece 12 for the gas cylinder inner bag 1 can be suitable for 70Mpa working strength, avoids gas cylinder inner bag 1 to warp, can store more hydrogen, reduces the hydrogen storage cost. Wherein the fibre layer 3 is provided with through holes for passing through the bottle valve seat 2.

In one embodiment, the hydrogen storage cylinder is provided with two binding areas 4, and the binding areas 4 are arranged in a surrounding manner along the circumference of the hydrogen storage cylinder so as to be fixed by the binding belt. The lashing region 4 may belong to a reinforcement 12 for reinforcement, further improving the overall strength. For the hydrogen storage cylinder shown in fig. 7, the braiding density of the net rack is increased in the corresponding binding area.

The utility model provides a hydrogen storage bottle, the gas cylinder inner bag increases its intensity by the rack of weaving, avoids its phenomenon such as subsidence that appears, promotes the life of gas cylinder inner bag, removes the potential safety hazard, reduces the hydrogen storage cost.

The bottle valve seat is made of metal materials, and strength of the bottle valve seat is improved. And the first connecting support leg is connected with the bottle valve seat, so that the reliability in connection is improved, and loosening is avoided.

The reinforcing piece is arranged in the air bottle liner, so that the strength of the air bottle liner is enhanced, and the problem of instability of external pressure of the plastic liner is effectively solved. And adopt joint and grafting mode, be connected with the bottle disk seat, can light smooth assembly, promote assembly efficiency. If the valve seat of the bottle is damaged, the bottle is easy to replace.

In the process of winding and using the gas cylinder liner by the fiber layer, the gas cylinder liner can be inflated without pressure or with a small amount of gas, so that the process of forming and using is reduced, and the safety and reliability of the hydrogen storage gas cylinder in use are improved.

In one embodiment, the temperature of the bladder 11 and the reinforcing member 12 is 180-230 ℃ and the molding time is 15-30 minutes, which achieves the beneficial effect that the plastic bladder cannot be completely adhered to the reinforcing member when the bladder is made of plastic and the reinforcing member is made of stainless steel material _。

Thus, various embodiments of the present application have been described in detail. In order to avoid obscuring the concepts of the present application, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.

Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. The hydrogen storage bottle is characterized by comprising a bottle liner and a bottle valve seat; the gas cylinder liner comprises a liner body, wherein the liner body is provided with a first end and a second end along the axial direction of the liner body, the first end and/or the second end is/are provided with an opening, both ends of the liner body along the axial direction of the liner body are provided with cylinder valve seats, and the cylinder valve seats cover the opening and/or the liner body;

2. The hydrogen storage cylinder as claimed in claim 1, wherein said reinforcement member includes a net frame woven from a plurality of reinforcement filaments.

3. The hydrogen storage cylinder of claim 2, wherein the mesh frame in the middle region has a weave density less than or equal to the weave density of the mesh frame in the two side regions.

4. A hydrogen storage cylinder as claimed in claim 2 or 3, wherein the reinforcement further comprises an annular wire mesh connected to the mesh frame; wherein, both sides of rack all are provided with one annular silk screen, just annular silk screen's weaving density is greater than the weaving density of rack.

5. A hydrogen storage cylinder as claimed in claim 2 or 3, wherein the net frame is provided with spike formations in regions of both sides, the spike formations being connected to the cylinder valve seat and/or the bladder.

6. A hydrogen storage cylinder according to claim 2 or 3, wherein the weave density of the mesh frame is adapted to the diameter of the hydrogen storage cylinder.

7. A hydrogen storage cylinder as claimed in any one of claims 1 to 3, wherein first connecting legs are provided on both sides of the reinforcement member in the axial direction of the container body, respectively, the first connecting legs being connected to the corresponding cylinder valve seats; the first connecting support leg protrudes out of the surface of the liner body.

8. A hydrogen storage cylinder as claimed in claim 2 or 3, wherein the mesh angle of the mesh frame is adapted to the weave density of the mesh frame.

9. A hydrogen storage cylinder as claimed in claim 2 or 3, wherein the weave density of the mesh frame includes an axial weave density of the mesh frame and a circumferential weave density of the mesh frame.

10. The hydrogen storage cylinder of claim 7, wherein said cylinder valve seat is provided with a recess, said first connecting leg being mounted in said recess.

11. A hydrogen storage cylinder according to any one of claims 1-3, characterized in that the hydrogen storage cylinder is provided with two lashing areas, which lashing areas are looped around the circumference of the hydrogen storage cylinder.

12. A hydrogen storage cylinder as claimed in any one of claims 1 to 3, wherein the temperature at which said bladder and said reinforcement member are integrally formed is 180-230 ℃ and the forming time is 15-30 minutes _。