Misoperation prevention device in hydrogen long pipe filling process

Abstract

The utility model provides a device for preventing misoperation in a long hydrogen pipe filling process, which comprises a long pipe trailer, a long pipe on the long pipe trailer is detachably connected with a connector, a first manual valve is arranged on the connector, the connector is detachably connected with a second manual valve through a hose, the second manual valve is detachably connected with a first gas guide pipe, and the first gas guide pipe is detachably connected with a second gas guide pipe. One end of the first gas guide pipe is detachably connected with the safe exhaust assembly, the other end is detachably connected with the automatic valve, and one side of the first gas guide pipe is detachably connected with the nitrogen conveying assembly; when the manual valve is closed, the nitrogen conveying assembly is emptied by inputting nitrogen; and a remote pressure gauge and a field pressure gauge are arranged on the first gas guide pipe. The pipeline is emptied through nitrogen, the added hydrogen is prevented from being doped with oxygen, whether the long-tube trailer is connected with the connector or not is judged by measuring pressure through the remote pressure gauge and the field pressure gauge after the hydrogen is filled, and therefore hydrogen leakage caused by the fact that the long-tube trailer is not connected with the connector is prevented.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure gas filling technology for hydrogen production enterprises, and mainly relates to a device to prevent misoperation during the filling of hydrogen long tubes. Background Technology

[0002] In the existing long-tube filling process of hydrogen production enterprises, the entire filling process is controlled by manual valves, remote valves, and transmitters. First, the filling column is connected to the long-tube trailer using a hydrogen refueling hose. After the air is replaced multiple times with nitrogen, hydrogen is replaced with nitrogen until the hydrogen is qualified. Finally, the valve is opened remotely to fill the long-tube trailer with high-pressure hydrogen. The filling pressure changes are monitored throughout the filling process until filling is completed.

[0003] After the hose is replaced, filling may not be necessary immediately. When filling is required, improper operation may cause the control valve of the unconnected filling column to be opened, resulting in high-pressure hydrogen gas being ejected from the hose. This could lead to hose ejection, causing equipment damage and personal injury, or even a fire or explosion. Utility Model Content

[0004] This invention provides a device to prevent misoperation during the filling of a long hydrogen tube, thereby solving the technical problems mentioned in the background art.

[0005] To address the aforementioned speed issue, the technical solution adopted by this utility model is as follows: a device to prevent misoperation during hydrogen long-tube filling, comprising a long-tube trailer, a long-tube mounted on the trailer, a connector detachably connected to the long-tube, a first manual valve on the connector, a hose connected to one side of the connector, a second manual valve detachably connected to one end of the hose, a first gas guide pipe detachably connected to one side of the first gas guide pipe, a second gas guide pipe detachably connected to one side of the first gas guide pipe, a safety exhaust assembly detachably connected to one end of the second gas guide pipe, an automatic valve detachably connected to the other end of the second gas guide pipe, and a nitrogen delivery assembly detachably connected to one side of the second gas guide pipe.

[0006] When the manual valve is closed, the nitrogen delivery assembly empties the hose, the first gas guide tube, and the second gas guide tube by inputting nitrogen.

[0007] The second gas duct is equipped with a remote pressure gauge and a local pressure gauge. After the remaining hydrogen in the long tube trailer is introduced into the hose, the first gas duct, and the second gas duct, the values ​​of the remote pressure gauge and the local pressure gauge are measured. The connection status between the long tube trailer and the connector is determined based on the values. A break-through joint is provided in the middle of the hose.

[0008] Furthermore, the second vent pipe of the safety venting assembly has a vent pipe and a manual valve at one end, and a one-way valve on the second vent pipe; two fourth vent pipes are detachably connected to both ends of the second vent pipe, and each of the two fourth vent pipes has a safety valve at one end. The safety valve automatically opens when the pressure exceeds 23 MPa.

[0009] Furthermore, the nitrogen delivery assembly includes a fifth gas guide pipe, a third manual valve is provided at the connection between the fifth gas guide pipe and the second gas guide pipe, and an air inlet pipe is provided at one end of the fifth gas guide pipe.

[0010] Furthermore, when the pressure measured by the remote pressure gauge and the on-site pressure gauge is 2 MPa, it is considered that the long-tube trailer and the connector are properly connected; the nitrogen pressure introduced by the air intake pipe is 0.8 MPa.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model achieves the purging of the pipeline by introducing the first gas guide tube, the hose, and the second gas guide tube, and the added hydrogen gas does not contain oxygen, making it purer, more practical, and safer.

[0013] 2. Using remote and on-site pressure gauges, the pressure in the first gas delivery pipe after hydrogen is added is measured. When the pressure is below 2 MPa, it is considered that the long pipe and the connector are not properly connected, thus preventing hydrogen leakage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] In the diagram: 1. Long-tube trailer; 11. Long tube; 2. Connector; 3. First manual valve; 4. Hope; 41. Breakaway joint; 5. Second manual valve; 6. First vent pipe; 61. Automatic valve; 62. Remote pressure gauge; 63. Local pressure gauge; 7. Safety venting assembly; 71. Second vent pipe; 72. Vent pipe; 73. Manual valve; 8. Nitrogen delivery assembly; 81. Fifth vent pipe; 82. Third manual valve; 83. Inlet pipe. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0017] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] Please refer to the appendix carefully. Figure 1 A device for preventing misoperation during hydrogen long-tube filling includes a long-tube trailer 1, on which a long tube 11 is provided. The long tube 11 is detachably connected to a connector 2, and a first manual valve 3 is provided on the connector 2. A hose 4 is connected to one side of the connector 2. A second manual valve 5 is detachably connected to one end of the hose 4. The second manual valve 5 is detachably connected to a first gas guide pipe 6. A safety exhaust assembly 7 is detachably connected to one end of the first gas guide pipe 6, and an automatic valve 61 is detachably connected to the other end. A nitrogen delivery assembly 8 is detachably connected to one side of the first gas guide pipe 6.

[0020] When the automatic valve 61 is closed, the nitrogen delivery assembly 8 uses nitrogen to purge the hose 4 and the first gas guide pipe 6.

[0021] Furthermore, the first air guide tube 6 is equipped with a remote pressure gauge 62 and a local pressure gauge 63; the hose 4 is provided with a break joint 41 in the middle.

[0022] The safety venting assembly 7 includes a second vent pipe 71, one end of which is equipped with a vent pipe 72 and a manual valve 73, and a one-way valve 74. Two fourth vent pipes 75 are detachably connected to both ends of the second vent pipe 71, and each of the two fourth vent pipes 75 is equipped with a safety valve 76. When nitrogen is introduced, it passes through the first vent pipe to the second vent pipe. With the manual valve open, it passes through the one-way valve and finally reaches the vent pipe for discharge, thus venting the gas in the pipeline. After repeating this process five times, the remaining hydrogen in the long-tube trailer is then discharged. The hydrogen is then transported through a hose to the first vent pipe and then to the second vent pipe before finally being discharged, thereby reducing the nitrogen content in the pipeline to a predetermined range.

[0023] The nitrogen delivery assembly 8 includes a fifth gas guide pipe 81, a third manual valve 82 is provided at the connection between the fifth gas guide pipe 81 and the second gas guide pipe 61, and an air inlet pipe 83 is provided at one end of the fifth gas guide pipe 81.

[0024] When the pressure measured by the remote pressure gauge 62 and the on-site pressure gauge 63 is 2 MPa, it is considered that the long-tube trailer 1 and the connector 2 are properly connected; the nitrogen pressure introduced by the air intake pipe 83 is 0.8 MPa.

[0025] Operating principle: When the long-tube trailer is parked in the designated position, the corresponding connector is connected to the long tube;

[0026] Then the automatic valve closes, the manual valve opens, the air inlet pipe is connected to the nitrogen generator, and nitrogen is charged. The nitrogen flows through the fifth air inlet pipe into the first air inlet pipe and the safety exhaust assembly in sequence. One end of the safety exhaust assembly is the vent pipe. The nitrogen is discharged through the first air inlet pipe into the second air inlet pipe, and then through the second air inlet pipe into the vent pipe and finally discharged. This operation is repeated five times.

[0027] Then the second manual valve opens, the third manual valve closes, and the hydrogen reserve in the long-tube trailer is opened. The hydrogen enters the first and second vent pipes through the hose and is finally discharged. If the hydrogen increases the pressure in the pipes, when the pressure in the pipes exceeds 23 MPa, the two safety valves open to accelerate the venting. After a certain period of venting, the manual valves close.

[0028] The automatic valve opens to purge hydrogen. Simultaneously, the remote pressure gauge 63 and the on-site pressure gauge 64 measure the pressure inside the first gas delivery pipe. After a certain period of purging, if the pressure reaches 2 MPa, the connection between the connector and the long pipe is considered intact. If the pressure is below 2 MPa, the connection between the connector and the long pipe is considered not to be properly established, and the gas supply is stopped. Then, the manual valve is opened to vent the gas, and the connector is manually reconnected. This method avoids the possibility of the hose swinging due to improper installation, which could injure workers. It also prevents large-scale hydrogen leakage. Since hydrogen is a flammable gas, this method also prevents fire and explosion accidents.

[0029] Meanwhile, a break joint is installed in the middle of the hose, which will break when subjected to strong pulling to ensure safety.

[0030] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A device for preventing misoperation during a hydrogen long tube filling process, comprising a long tube trailer (1), characterized in that: The long tube trailer (1) is provided with a long tube (11), the long tube (11) is detachably connected with a connector (2), a first manual valve (3) is arranged on the connector (2), a pipeline is connected with a hose (4) on one side of the connector (2), one end of the hose (4) is detachably connected with a second manual valve (5), the second manual valve (5) is detachably connected with a first air guide pipe (6), one end of the first air guide pipe (6) is detachably connected with a safety exhaust assembly (7), the other end of the first air guide pipe (6) is detachably connected with an automatic valve (61), and a nitrogen delivery assembly (8) is detachably connected with one side of the first air guide pipe (6). The nitrogen delivery assembly (8) is used for emptying the hose (4) and the first air guide pipe (6) by inputting nitrogen when the automatic valve (61) is closed. A remote pressure gauge (62) and a field pressure gauge (63) are arranged on the first air guide pipe (6).

2. A device for preventing misoperation during a long tube filling process of hydrogen gas according to claim 1, characterized in that: A pull-off joint (41) is arranged in the hose (4).

3. A device for preventing misoperation during a long tube filling process of hydrogen gas according to claim 1, characterized in that: The safety exhaust assembly (7) comprises a second air guide pipe (71), the second air guide pipe (71) is provided with a vent pipe (72) and a manual valve (73) at one end, and a one-way valve (74) is arranged on the second air guide pipe (71).

4. A device for preventing misoperation during a long tube filling process of hydrogen gas according to claim 3, characterized in that: Two fourth air guide pipes (75) are detachably connected with two ends of the second air guide pipe (71), and a safety valve (76) is arranged at one end of each of the two fourth air guide pipes (75).

5. A device for preventing misoperation during a long tube filling process of hydrogen gas according to claim 1, characterized in that: The nitrogen delivery assembly (8) comprises a fifth air guide pipe (81), a third manual valve (82) is arranged at a connection position between the fifth air guide pipe (81) and the first air guide pipe (6), and an air inlet pipe (83) is arranged at one end of the fifth air guide pipe (81).

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