Tubular hydrogen storage structure

Abstract

The utility model provides a tubular hydrogen storage structure, which belongs to the technical field of hydrogen energy storage and comprises a central tube and a plurality of gas storage tubes. The central pipe serves as a main body supporting foundation, and the gas storage pipes are wound on the outer side of the central pipe; one end of each gas storage pipe extends out of the central pipe and is communicated with the gas inlet gas collecting ball head, and the other end of each gas storage pipe extends out of the central pipe and is communicated with the gas outlet gas collecting ball head, so that hydrogen flows into or out of the gas storage pipes through the gas inlet gas collecting ball head and the gas outlet gas collecting ball head. According to the hydrogen storage structure, the multiple gas storage pipes are wound on the outer side of the central pipe, the hydrogen storage capacity can be improved, the multiple gas storage pipes with small pipe diameters can bear larger pressure more easily, then the hydrogen storage structure can be made of common materials, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen energy storage, and specifically relates to a tubular hydrogen storage structure. Background Art

[0002] At present, high-pressure hydrogen storage bottles are the main way to store hydrogen, and there are mainly two types of structures: thick-walled high-strength steel metal structure and carbon fiber winding structure. Due to the thick-wall design of thick-walled high-strength steel metal structure, the weight and volume of the hydrogen storage bottle are large, making it bulky during transportation and use, which is not conducive to the lightweight design of the hydrogen energy system. The carbon fiber winding structure has a high manufacturing cost due to the high price of the carbon fiber material itself and the complex winding process. In addition, the manufacturing cycle of the carbon fiber hydrogen storage bottle is long. The development of new hydrogen storage structures is of great significance to hydrogen storage. Utility Model Content

[0003] In order to reduce the manufacturing cost of the hydrogen storage structure and improve the storage capacity, the utility model provides a tubular hydrogen storage structure, in which multiple gas storage pipes are wound around the outside of a central pipe, which can increase the hydrogen storage capacity. Multiple gas storage pipes with thin tube diameters can more easily withstand greater pressure, thereby enabling the hydrogen storage structure to be made of ordinary materials, reducing costs.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A tubular hydrogen storage structure includes a central tube and multiple gas storage tubes; the central tube serves as a main support base, and the multiple gas storage tubes are wound around the outside of the central tube; one end of each gas storage tube extends outward from the central tube and is connected to an air inlet collecting ball head, and the other end of each gas storage tube extends outward from the central tube and is connected to an air outlet collecting ball head, so that hydrogen flows into or out of the gas storage tubes through the air inlet collecting ball head and the air outlet collecting ball head.

[0006] Furthermore, the diameter of the gas storage pipe gradually decreases in the section extending outside the central pipe.

[0007] Furthermore, a plurality of gas storage pipes are wound around the outer side of the central pipe in a multi-layer manner, the gas storage pipes of each layer are wound in circles, and the gas storage pipes of two adjacent layers are staggered with each other.

[0008] Furthermore, the outer wall of the outermost gas storage pipe is provided with a layer of prestressed tensioned winding pipe bundle.

[0009] Furthermore, the air inlet and outlet collecting ball heads are both hollow annular structures, with multiple air holes opened on the hollow annular structure, each air hole correspondingly connected to a port of an air storage pipe; the hollow annular structure also has a main air port and a valve at the main air port.

[0010] Furthermore, stoppers are provided on both axial sides of the area where the central tube is wound around the gas storage tube.

[0011] Furthermore, the gas storage pipe is made of carbon steel or stainless steel.

[0012] Furthermore, the diameter of the wound portion of the gas storage tube is 5-20 mm.

[0013] The beneficial effects of the utility model include:

[0014] Through the design of multiple gas storage pipes, the overall capacity of the hydrogen storage structure can be increased, thereby efficiently storing hydrogen. At the same time, through the setting of the air inlet and outlet collecting ball heads, the rapid inflow and outflow of hydrogen can be easily achieved, meeting the rapid response requirements of hydrogen storage and use. Wrapping multiple gas storage pipes around the outside of the central pipe not only increases the hydrogen storage capacity, but also makes the entire hydrogen storage structure more compact, reduces the occupied space, and improves space utilization. Since the gas storage pipes are wrapped around the central pipe, when hydrogen is filled or released, the pressure can be evenly distributed on each gas storage pipe, avoiding the risk of structural damage or hydrogen leakage caused by uneven pressure. The overall structure is relatively simple, and multiple gas storage pipes with thin tube diameters can more easily withstand greater pressure, so that the hydrogen storage structure can be made of ordinary materials, reducing manufacturing and processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the staggered positions of the gas storage pipes on each layer of the utility model.

[0017] In the figure: 1. Central tube; 2. Gas storage tube; 3. Air inlet collecting ball head; 4. Air outlet collecting ball head; 5. Tighten the winding tube bundle. DETAILED DESCRIPTION

[0018] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] Example 1

[0021] A tubular hydrogen storage structure, reference Figure 1 , including a central tube 1 and a plurality of gas storage tubes 2; the gas storage tubes 2 preferably in this embodiment are all thin tubes with a diameter ranging from 5 to 20 mm;

[0022] A plurality of gas storage pipes 2 are wound around the outside of the central tube 1 in a multi-layer manner, and the gas storage pipes 2 of each layer are wound in circles, and the gas storage pipes 2 of two adjacent layers are staggered with each other. When winding, one end of the plurality of gas storage pipes 2 is first connected to the air inlet collecting ball head 3 or the air outlet collecting ball head 4, and the other end extends to the central tube 1 to be wound in circles. After the winding of one layer of gas storage pipes 2 is completed, the next layer of gas storage pipes 2 is staggered with the previous layer of gas storage pipes 2. After winding to a set number of circles, it extends to the other direction and connects to the air inlet collecting ball head 3 or the air outlet collecting ball head 4 in the other direction. Since the diameter of the selected gas storage pipe 2 is relatively thin, multiple tubes with thinner diameters can more easily withstand greater pressure. By storing pressure through multiple layers of thinner tube bundles, the purpose of using ordinary materials to make hydrogen storage structures is achieved, and the cost is reduced. The multiple layers of gas storage pipes 2 are staggered and wound, and interact with each other, so that the tube bundle can withstand greater pressure.

[0023] The diameter of the gas storage pipe 2 gradually decreases as it extends outward from the central pipe 1. Figure 1 That is, the gas storage pipe 2 transitions from the winding part through a section of reduced diameter pipe 2-1 to a thin diameter pipe 2-2, so that the pipe diameter at the connection with the collecting ball head is smaller than the pipe diameter of the winding part. This arrangement allows the volume of the collecting ball head connected to multiple gas storage pipes 2 to be relatively small and easy to withstand greater pressure; the collecting ball head with a relatively small radius can be made of ordinary materials, and the wall thickness is relatively thin, saving materials and costs.

[0024] refer to Figure 1 The left and right collecting ball heads, one for air inlet and the other for air outlet, are hollow annular structures with multiple air holes, each of which is connected to a corresponding port of an air storage pipe; a total air port is also provided on the hollow annular structure and a valve is provided at the total air port.

[0025] The gas storage pipe 2 is made of ordinary carbon steel or stainless steel thin-walled steel pipe, and adopts a layer-by-layer winding structure. A prestressed tension winding pipe bundle 5 is added to the outer side of the winding part of the outermost gas storage pipe 2 to generate a pre-tightening force on the inner gas storage pipe 2. The thin steel pipe (referring to the gas storage pipe 2) can withstand a pressure of 25-30Mpa or even higher. Stop structures are set on both sides of the axial direction of the area where the central pipe 1 is wound around the gas storage pipe 2 to prevent the axial deformation of the winding structure of the gas storage pipe 2; the steel pipe is reduced in diameter at the gathering point of the collecting ball head to ensure that the hydrogen is transferred to the collecting ball head. After the reduction in diameter, the welding groove of the steel pipe becomes smaller, which is convenient for installation and welding to the collecting ball head. The collecting ball head structure with a relatively small radius can withstand higher pressure.

[0026] Based on the above structural setting, the tubular hydrogen storage structure can use the most common materials. Through structural design, the storage capacity is improved, the use of high-strength materials is avoided, the manufacturing cost and processing cost are reduced, and materials are saved; the outwardly extending part of the gas storage pipe 2 is set to be narrowed, so that the joint with the collecting ball head becomes thinner, which is convenient for welding more gas storage pipe 2 joints to the collecting ball head; the use of a prestressed tensioning winding tube bundle 5 structure is equivalent to a reinforcement, and its compressive preload force and the overall pressure expansion force of the gas storage pipe 2 offset each other, ensuring overall uniform force; the overall structure is simple; multiple gas storage pipes 2 are connected to the collecting ball head, and the hydrogen charging and discharging rate is fast; the gas storage pipe 2 uses ordinary carbon steel or stainless steel thin-walled steel pipes, which are not sensitive to temperature difference stress, and the stainless steel material can be used up to -196°C.

[0027] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A tubular hydrogen storage structure, characterized in that: The invention comprises a central tube (1) and a plurality of gas storage tubes (2) of thin diameter; the central tube (1) serves as a main body support base, and the plurality of gas storage tubes (2) are wound around the outside of the central tube (1); one end of each gas storage tube (2) extends outward from the central tube (1) and is connected to an air inlet collecting ball head (3), and the other end of each gas storage tube (2) extends outward from the central tube (1) and is connected to an air outlet collecting ball head (4), so as to allow hydrogen to flow into or out of the gas storage tube (2) through the air inlet collecting ball head (3) and the air outlet collecting ball head (4).

2. A tubular hydrogen storage structure according to claim 1, characterized in that: The diameter of the gas storage pipe (2) gradually decreases as it extends outward from the central pipe (1).

3. A tubular hydrogen storage structure according to claim 2, characterized in that: A plurality of gas storage pipes (2) are wound around the outside of the central pipe (1) in a multi-layer manner, the gas storage pipes (2) of each layer are wound in turns, and the gas storage pipes (2) of two adjacent layers are staggered with each other.

4. A tubular hydrogen storage structure according to claim 3, characterized in that: The outer wall of the outermost gas storage pipe (2) is provided with a layer of prestressed tensioned winding pipe bundle (5).

5. A tubular hydrogen storage structure according to claim 2, characterized in that: The air inlet collecting ball head (3) and the air outlet collecting ball head (4) are both hollow annular structures, with a plurality of air holes provided on the hollow annular structure, each air hole correspondingly connected to a port of an air storage pipe (2); a total air port is also provided on the hollow annular structure and a valve is provided at the total air port.

6. A tubular hydrogen storage structure according to any one of claims 1 to 5, characterized in that: Stoppers are provided on both axial sides of the area where the central tube (1) is wound around the gas storage tube (2).

7. A tubular hydrogen storage structure according to claim 6, characterized in that: The gas storage pipe (2) is made of carbon steel or stainless steel.

8. A tubular hydrogen storage structure according to claim 7, characterized in that: The diameter of the winding part of the gas storage pipe (2) is 5-20 mm.

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