Hydrogen storage cylinder inflation structure and inflation method

By introducing storage balls and barriers into the hydrogen tank inflation structure and utilizing negative pressure to collect residual hydrogen, the problems of leakage and waste during the hydrogen tank inflation process are solved, achieving an efficient inflation process.

CN120609020APending Publication Date: 2025-09-09HANGYUAN HYDROSINE (SICHUAN) TRAVEL TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202510769347.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-10
Publication Date
2025-09-09

AI Technical Summary

Technical Problem

In the prior art, residual hydrogen in the connecting pipe is easily leaked during the hydrogen tank filling process, resulting in resource waste and unsaturated filling.

Method used

A hydrogen storage bottle inflation structure is designed, including an inflation tube, a storage ball and a barrier. By utilizing the negative pressure of the storage ball to collect residual hydrogen at the end of inflation, the small hydrogen tank is ensured to be saturated and gas leakage is avoided.

Benefits of technology

It realizes the automatic collection of residual hydrogen under the premise that the small hydrogen tank is saturated, avoids gas leakage and waste, and improves the charging efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a hydrogen storage bottle inflation structure in the technical field of hydrogen bottle inflation, which comprises a gas tank main body, the gas tank main body comprises a large hydrogen tank and a small hydrogen tank, the large hydrogen tank and the small hydrogen tank are both provided with inlet valves, an inflation mechanism is arranged between the large hydrogen tank and the small hydrogen tank, and the inflation mechanism comprises an inflation pipe, a gas inlet valve and a gas outlet valve, plug connectors are arranged at the two ends of the gas filling pipe, can be communicated with the large hydrogen tank and the small hydrogen tank, and can be inserted into the inlet valve; the storage ball is installed in the middle of the gas filling pipe through a connecting assembly, the storage ball has elasticity and can expand, the positions, corresponding to the two sides of the storage ball, of the gas filling pipe are each provided with a blocking piece, and the blocking pieces can limit gas in the gas filling pipe from passing through. And gas leakage and waste are avoided on the premise of ensuring the filling saturation in the small hydrogen tank.
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Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen cylinder inflation, and in particular to a hydrogen storage cylinder inflation structure and inflation method. Background Art

[0002] The smaller hydrogen tanks are typically inflated by connecting them to a larger one, with the gas in the larger tank being divided and filled into the smaller tanks. The larger and smaller hydrogen tanks are typically connected via a connecting pipe. By opening the outlet and inlet valves of the larger and smaller tanks, the connecting pipe is connected between the inlet valves, allowing gas to flow into the connecting pipe through the outlet valve. Once the smaller hydrogen tank is saturated, the outlet and inlet valves are closed, completing the inflation of the smaller hydrogen tank.

[0003] In order to ensure that the small hydrogen tank is filled saturated, some hydrogen will remain in the connecting pipe after the filling is completed, which may easily cause hydrogen leakage and thus waste resources. If the filling process is terminated prematurely, the small hydrogen tank may easily become under-filled.

[0004] Based on this, the present invention designs a hydrogen storage bottle inflation structure and inflation method to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a hydrogen storage bottle inflation structure that can automatically collect the residual hydrogen in the connecting pipe, thereby avoiding gas leakage and waste while ensuring that the small hydrogen tank is filled saturated.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A hydrogen storage bottle inflation structure includes a gas tank body, wherein the gas tank body includes a large hydrogen tank and a small hydrogen tank, wherein both the large hydrogen tank and the small hydrogen tank are provided with an inlet valve, and an inflation mechanism is provided between the large hydrogen tank and the small hydrogen tank, wherein the inflation mechanism includes:

[0008] An inflation pipe, wherein both ends of the inflation pipe are provided with connectors, the connectors can be connected to the large hydrogen tank and the small hydrogen tank, and the connectors can be plugged into the inlet valve;

[0009] A storage ball is installed in the middle position of the inflation tube through a connecting assembly. The storage ball is elastic and can expand. Barriers are provided on the inflation tube at positions corresponding to both sides of the storage ball. The barrier can limit the passage of gas in the inflation tube.

[0010] Preferably, the barrier component includes a three-way valve, a connecting tube and a control valve. The straight tube of the three-way valve is fixedly connected to the inflation tube, the vertical tube of the three-way valve is fixedly connected to the connecting tube, and a control valve is fixedly installed on one end of the connecting tube away from the three-way valve. A sealing plug is movably provided in the vertical tube of the three-way valve. When the control valve is open, gas can enter the vertical tube of the three-way valve through the connecting tube, and the sealing plug can be squeezed to block the straight tube of the three-way valve and block the straight tube.

[0011] Preferably, the connecting assembly includes a branch pipe and a sealing valve, the branch pipe is fixedly installed in the middle position of the inflation tube, the lower end of the branch pipe is fixedly connected to the storage ball, and the sealing valve is installed in the middle position of the branch pipe.

[0012] Preferably, built-in elastic plates are symmetrically installed inside the sealing valve, and two groups of built-in elastic plates are provided and symmetrically installed inside the sealing valve. The middle position of the built-in elastic plate is set vertically and the surface of the vertical section is provided with an adhesive layer.

[0013] Preferably, a barrier is also provided near the connector at one end of the inflation tube, the connector at the end near the barrier is connected to the inlet valve of the large hydrogen tank, and the connector at the end away from the barrier is connected to the inlet valve of the small hydrogen bottle.

[0014] Preferably, a hydrogen outlet is fixedly installed on the upper end of the gas tank body, an outlet valve is fixedly installed on the upper end of the hydrogen outlet, the inlet valve is fixedly installed on one side of the hydrogen outlet, a pressure sensor is fixedly installed at the position of the hydrogen outlet corresponding to the outlet valve, and a high-temperature automatic relief device is fixedly installed on one side of the hydrogen outlet.

[0015] Preferably, the main body of the gas tank is made of wrapped carbon fiber material, the inner wall of the gas tank body is a high-density plastic liner, the sealing valve is made of elastic silicone, the connection between the built-in elastic plate and the sealing valve is set to be sealed, and the large hydrogen tank and the small hydrogen tank are both provided with a pressure reducing valve.

[0016] Another object of the present invention is to provide a technical solution:

[0017] A method for filling a hydrogen storage bottle comprises the following steps:

[0018] Step 1: Connect the connectors at both ends of the inflation tube to the inlet valves on the large hydrogen tank and the small hydrogen tank respectively;

[0019] Step 2: Open the pressure reducing valve on the small hydrogen tank, and slowly open the pressure reducing valve on the large hydrogen tank;

[0020] Step 3: Open the two sets of barrier pieces near the large hydrogen tank and pull the sealing valves from both sides to separate the built-in elastic plates from each other, allowing the retained gas in the storage ball to enter the end of the inflation tube near the large hydrogen tank;

[0021] Step 4: When the pressures at the front and rear ends of the pressure reducing valve of the large hydrogen tank reach equilibrium, open all barriers to allow gas to enter the small hydrogen tank through the inflation pipe:

[0022] Step 5: When the small hydrogen tank is fully inflated, close the outlet valves on the large hydrogen tank and the small hydrogen tank, then press the storage ball and release it, so that the residual gas in the inflation tube enters the storage ball under the action of negative pressure.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. When the small hydrogen tank is saturated with gas, the present invention closes the two groups of large and small gas tank bodies, and squeezes the storage ball so that the gas remaining in the inflation tube enters the storage ball for storage under the action of negative pressure. The gas is then sealed in the storage ball through the connecting component. After storage, the connector is removed from the inlet valve, thereby automatically collecting the residual gas while ensuring that the small hydrogen tank is saturated with gas, thereby avoiding gas leakage.

[0025] 2. In the present invention, before the gas is discharged, the two sets of barriers close to the large hydrogen tank are opened and the connecting components are adjusted so that the retained gas in the storage ball enters the end of the inflation tube close to the large hydrogen tank, so that the gas retained from the last inflation is gathered at the end of the inflation tube close to the large hydrogen tank. The residual gas increases the air pressure at this end of the inflation tube, thereby reducing the air pressure difference between the inflation tube and the inlet valve, thereby shortening the time for the inflation tube and the inlet valve of the large hydrogen tank to reach air pressure equilibrium, thereby improving the efficiency of inflation of the small hydrogen tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention from a front side perspective;

[0028] Figure 2 For the present invention Figure 1 A partial schematic diagram of the structure at point A;

[0029] Figure 3 For the present invention Figure 1 A partial schematic diagram of the structure at B in the middle;

[0030] Figure 4 Schematic diagram of the structure of the inflation tube in the present invention;

[0031] Figure 5 This is a cross-sectional view of the structure of the sealing valve of the present invention;

[0032] Figure 6 This is an operational flow chart of the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0034] 1. Gas tank body; 2. Hydrogen outlet; 3. Outlet valve; 4. Inlet valve; 5. Pressure sensor; 6. High-temperature automatic release device; 7. Inflating tube; 8. Sealing valve; 9. Storage ball; 10. Three-way valve; 11. Connector; 12. Built-in elastic plate; 13. Connecting tube; 14. Control valve; 15. Branch pipe. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] See also Figures 1-6 , the present invention provides a technical solution:

[0037] A hydrogen storage bottle inflation structure includes a gas tank body 1, the gas tank body 1 includes a large hydrogen tank and a small hydrogen tank, the large hydrogen tank and the small hydrogen tank are both provided with an inlet valve 4, and an inflation mechanism is provided between the large hydrogen tank and the small hydrogen tank, the inflation mechanism includes:

[0038] The charging pipe 7 is provided with connectors 11 at both ends of the charging pipe 7. The connectors 11 can be connected to the large hydrogen tank and the small hydrogen tank, and the connectors 11 can be plugged into the inlet valve 4;

[0039] The storage ball 9 is installed in the middle position of the inflation tube 7 through a connecting assembly. The storage ball 9 is elastic and can expand. Barriers are provided on the inflation tube 7 at positions corresponding to both sides of the storage ball 9. The barrier can limit the passage of gas in the inflation tube 7.

[0040] In the present invention, the connectors 11 at both ends of the inflation tube 7 are connected to the inlet valves 4 on the large hydrogen tank and the small hydrogen tank respectively, the two sets of barriers near the large hydrogen tank are opened, and the connecting components are adjusted so that the retained gas in the storage ball 9 enters the end of the inflation tube 7 near the large hydrogen tank, so that the gas retained from the last inflation is gathered at the end of the inflation tube 7 near the large hydrogen tank, and the air pressure at this end of the inflation tube 7 is increased by the residual gas, thereby reducing the air pressure difference between the inflation tube 7 and the inlet valve 4, thereby shortening the time for the inflation tube 7 and the inlet valve 4 of the large hydrogen tank to reach air pressure equilibrium, thereby improving the efficiency of inflation of the small hydrogen tank. After balancing, open all three groups of barriers to allow the gas to flow steadily into the small hydrogen tank. When the small hydrogen tank is saturated with gas, close the large and small groups of gas tank bodies 1. By squeezing the storage ball 9, the gas retained in the inflation tube 7 enters the storage ball 9 for storage under the action of negative pressure. The gas is then sealed in the storage ball 9 through the connecting assembly. After storage, the connector 11 is removed from the inlet valve 4, thereby automatically collecting the residual gas while ensuring that the small hydrogen tank is saturated with gas to avoid gas leakage.

[0041] The barrier comprises a three-way valve 10, a connecting capillary 13 and a control valve 14. The straight tube of the three-way valve 10 is fixedly connected to the inflation tube 7, and the vertical tube of the three-way valve 10 is fixedly connected to the connecting capillary 13. The control valve 14 is fixedly installed at one end of the connecting capillary 13 away from the three-way valve 10. A sealing plug is movably provided in the vertical tube of the three-way valve 10. When the control valve 14 is open, gas can enter the vertical tube of the three-way valve 10 through the connecting capillary 13. The sealing plug can be squeezed and blocked in the straight tube of the three-way valve 10 and block the straight tube. In the present invention, the control valve 14 is filled with inert gas. When the control valve 14 is opened, the inert gas enters the vertical tube of the three-way valve 10 through the connecting capillary 13. The straight tube is blocked by the sealing plug squeezed in the vertical tube by the gas. When the control valve 14 is closed, the inert gas flows back into the control valve 14.

[0042] The connection assembly includes a branch pipe 15 and a sealing valve 8. The branch pipe 15 is fixedly installed in the middle of the inflation tube 7. The lower end of the branch pipe 15 is fixedly connected to the storage ball 9. The sealing valve 8 is installed in the middle of the branch pipe 15. In the present invention, the gas is connected to the inflation tube 7 through the branch pipe 5, and the sealing valve 8 can control the flow of gas in the branch pipe 5.

[0043] The sealing valve 8 is symmetrically mounted with internal elastic plates 12. Two sets of internal elastic plates 12 are symmetrically mounted within the sealing valve 8. The middle portion of the internal elastic plates 12 is vertically positioned, and the surface of the vertical portion is provided with an adhesive layer. In the present invention, pressing the sealing valve 8 causes the internal elastic plates 12 to approach each other, causing the middle portions of the internal elastic plates 12 to adhere, thereby sealing the middle portion of the sealing valve 8 and restricting the flow of gas within the branch pipe 15.

[0044] A barrier is also provided near connector 11 at one end of the inflation tube 7. Connector 11 on the end near the barrier connects to the inlet valve 4 of the large hydrogen tank, while connector 11 on the end away from the barrier connects to the inlet valve 4 of the small hydrogen bottle. Three sets of barriers are provided in the present invention, all installed within the inflation tube 7: one set is connected to the end of the tube 7, and the other two sets are symmetrically located on either side of the storage ball 9.

[0045] Among them, the upper end of the gas tank body 1 is fixedly mounted with a hydrogen outlet 2, the upper end of the hydrogen outlet 2 is fixedly mounted with an outlet valve 3, the inlet valve 4 is fixedly mounted on one side of the hydrogen outlet 2, the position of the hydrogen outlet 2 corresponding to the outlet valve 3 is fixedly mounted with a pressure sensor 5, and one side of the hydrogen outlet 2 is fixedly mounted with a high-temperature automatic relief device 6. When inflating in the present invention, the outlet valve 3 needs to be opened, and the pressure sensor 5 can detect the pressure inside the gas tank body 1.

[0046] Among them, the gas tank body 1 is made of wrapped carbon fiber material, the inner wall of the gas tank body 1 is a high-density plastic liner, the sealing valve 8 is made of elastic silicone, and the connection between the built-in elastic plate 12 and the sealing valve 8 is set to be sealed. Both the large hydrogen tank and the small hydrogen tank are provided with a pressure reducing valve.

[0047] Another object of the present invention is to provide a technical solution:

[0048] A method for filling a hydrogen storage bottle comprises the following steps:

[0049] Step 1: Connect the connectors 11 at both ends of the charging tube 7 to the inlet valves 4 on the large hydrogen tank and the small hydrogen tank respectively;

[0050] Step 2: Open the pressure reducing valve on the small hydrogen tank, and slowly open the pressure reducing valve on the large hydrogen tank;

[0051] Step 3: Open the two sets of barriers near the large hydrogen tank and pull the sealing valve 8 from both sides to separate the built-in elastic plates 12 from each other, allowing the retained gas in the storage ball 9 to enter the end of the inflation tube 7 near the large hydrogen tank;

[0052] Step 4: When the pressures at the front and rear ends of the pressure reducing valve of the large hydrogen tank reach equilibrium, open all barriers to allow the gas to enter the small hydrogen tank through the inflation pipe 7:

[0053] Step 5: When the small hydrogen tank is fully inflated, close the outlet valves 3 on the large and small hydrogen tanks, then press and release the storage ball 9, so that the residual gas in the inflation tube 7 enters the storage ball 9 under the action of negative pressure.

[0054] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A hydrogen storage bottle inflation structure, comprising a gas tank body (1), characterized in that: The gas tank body (1) includes a large hydrogen tank and a small hydrogen tank, each of which is provided with an inlet valve (4), and an inflation mechanism is provided between the large hydrogen tank and the small hydrogen tank, the inflation mechanism including: An air filling pipe (7), wherein both ends of the air filling pipe (7) are provided with connectors (11), the connectors (11) can be connected to the large hydrogen tank and the small hydrogen tank, and the connectors (11) can be plugged into the inlet valve (4); A storage ball (9) is installed in the middle of the inflation tube (7) through a connecting assembly. The storage ball (9) is elastic and can expand. Blocking pieces are provided on the inflation tube (7) at positions corresponding to both sides of the storage ball (9). The blocking pieces can limit the passage of gas in the inflation tube (7).

2. A hydrogen storage bottle inflation structure according to claim 1, characterized in that: The barrier comprises a three-way valve (10), a connecting capillary (13) and a control valve (14); the straight tube of the three-way valve (10) is fixedly connected to the inflation tube (7); the vertical tube of the three-way valve (10) is fixedly connected to the connecting capillary (13); the control valve (14) is fixedly installed at one end of the connecting capillary (13) away from the three-way valve (10); a sealing plug is movably provided in the vertical tube of the three-way valve (10); when the control valve (14) is open, gas can enter the vertical tube of the three-way valve (10) through the connecting capillary (13); and the sealing plug can be squeezed to block the straight tube of the three-way valve (10) and block the straight tube.

3. The hydrogen storage bottle inflation structure according to claim 1, characterized in that: The connecting assembly comprises a branch pipe (15) and a sealing valve (8), wherein the branch pipe (15) is fixedly installed in the middle position of the inflation pipe (7), the lower end of the branch pipe (15) is fixedly connected to the storage ball (9), and the sealing valve (8) is installed in the middle position of the branch pipe (15).

4. A hydrogen storage bottle inflation structure according to claim 3, characterized in that: A built-in elastic plate (12) is symmetrically installed inside the sealing valve (8), and two groups of the built-in elastic plates (12) are provided and symmetrically installed inside the sealing valve (8). The middle position of the built-in elastic plate (12) is set to be vertical, and the surface of the vertical section is provided with an adhesive layer.

5. The hydrogen storage bottle inflation structure according to claim 1, characterized in that: A barrier is also provided at a position near the plug connector (11) at one end of the inflation tube (7); the plug connector (11) at the end near the barrier is plugged into the inlet valve (4) of the large hydrogen tank, and the plug connector (11) at the end away from the barrier is plugged into the inlet valve (4) of the small hydrogen bottle.

6. The hydrogen storage bottle inflation structure according to claim 1, characterized in that: A hydrogen outlet (2) is fixedly mounted on the upper end of the gas tank body (1), an outlet valve (3) is fixedly mounted on the upper end of the hydrogen outlet (2), the inlet valve (4) is fixedly mounted on one side of the hydrogen outlet (2), a pressure sensor (5) is fixedly mounted at a position of the hydrogen outlet (2) corresponding to the outlet valve (3), and a high-temperature automatic relief device (6) is fixedly mounted on one side of the hydrogen outlet (2).

7. The hydrogen storage bottle inflation structure according to claim 4, characterized in that: The gas tank body (1) is formed by winding a carbon fiber material, the inner wall of the gas tank body (1) is a high-density plastic liner, the sealing valve (8) is formed by elastic silicone, the connection between the built-in elastic plate (12) and the sealing valve (8) is configured to be sealed, and both the large hydrogen tank and the small hydrogen tank are provided with a pressure reducing valve.

8. A method for inflating a hydrogen storage bottle, applicable to a hydrogen storage bottle inflation structure according to any one of claims 1 to 7, characterized in that: Including steps: Step 1: Connect the connectors (11) at both ends of the inflation tube (7) to the inlet valves (4) on the large hydrogen tank and the small hydrogen tank respectively; Step 2: Open the pressure reducing valve on the small hydrogen tank, and slowly open the pressure reducing valve on the large hydrogen tank; Step 3: Open the two sets of barrier members near the large hydrogen tank and pull the sealing valve (8) from both sides to separate the built-in elastic plates (12) from each other, so that the retained gas in the storage ball (9) enters the end of the inflation tube (7) near the large hydrogen tank; Step 4: When the pressures at the front and rear ends of the pressure reducing valve of the large hydrogen tank reach equilibrium, all barriers are opened to allow the gas to enter the small hydrogen tank through the inflation pipe (7): Step 5: When the small hydrogen tank is fully inflated, close the outlet valves (3) on the large hydrogen tank and the small hydrogen tank, then press the storage ball (9) and release it, so that the residual gas in the inflation tube (7) enters the storage ball (9) under the action of negative pressure.