Hydrogen filling metering system

Abstract

The utility model discloses a hydrogen filling metering system, belongs to the technical field of hydrogen filling, and solves the problem that the existing hydrogen filling metering system is easy to leak to cause potential safety hazards. The device comprises a filter, a liquid hydrogen flow meter, a flow control valve and a controller, the filter, the liquid hydrogen flow meter and the flow control valve are sequentially connected through a pipeline, the liquid hydrogen flow meter and the flow control valve are both electrically connected with the controller, and the device further comprises a cabinet body, an inner cavity of the cabinet body is divided into a first cavity body and a second cavity body which are mutually independent through a partition plate, the filter, the liquid hydrogen flow meter and the flow control valve are all installed in the first cavity body, the controller is installed in the second cavity body, a hydrogen sensor is arranged in the first cavity body, an alarm is arranged at the top of the cabinet body, and the controller is installed in the second cavity body. And the hydrogen sensor and the alarm are electrically connected with the controller. According to the hydrogen filling and metering system, the use safety of the hydrogen filling and metering system can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen filling, and more specifically, to a hydrogen filling metering system. Background Art

[0002] The storage and transportation modes of hydrogen are mainly transported in the form of pipelines, gas cylinders, tank trucks, etc. Pipeline hydrogen transportation is suitable for scenarios with stable and continuous supply, and the supply volume is generally large. Gas cylinder hydrogen transportation is in the form of small steel gas cylinders, containers or long tube trailers. The supply volume of the former two is extremely small, while the supply volume of long tube trailers is relatively large. Generally speaking, the supply volume of the tube bundle vehicle supply mode per unit time is still less than that of the pipeline transportation mode. Tank trucks are mainly used to transport liquid hydrogen, and hydrogen needs to be liquefied at the factory end. The transportation volume is large, but it is still blank in the domestic civilian field. Therefore, the current hydrogen energy gas source supply is mainly based on the tube bundle vehicle supply mode, and its metering method follows the method of the industrial gas industry. Generally, the filling or unloading volume is calculated by formula based on parameters such as the inlet and outlet temperature and pressure, and the water volume of the tube bundle vehicle.

[0003] Existing hydrogen filling systems, such as the one with publication number CN 220205400 U, disclose a liquid hydrogen filling metering system and a liquid hydrogen filling device, which are applied to the field of liquid hydrogen filling technology to solve the problems of unstable liquid hydrogen filling process and difficulty in accurately controlling the filling amount. Specifically, the system includes a liquid hydrogen storage tank, a filter, a liquid hydrogen flowmeter, a flow control valve, and a flow controller. The liquid hydrogen outlet of the liquid hydrogen storage tank is connected to the liquid hydrogen inlet of the filter via a first liquid hydrogen pipeline, and the liquid hydrogen outlet of the filter is connected to the liquid hydrogen inlet of the liquid hydrogen tank via a second liquid hydrogen pipeline. The second liquid hydrogen pipeline is sequentially provided with a liquid hydrogen flowmeter and a flow control valve, and the flow controller is electrically connected to the liquid hydrogen flowmeter and the flow control valve, respectively. In this way, by adding the liquid hydrogen flowmeter and the flow control valve, accurate recording of hydrogenation quality can be achieved. Moreover, the feedback control loop formed by the liquid hydrogen flowmeter, the flow control valve, and the flow controller can not only achieve stable control of the hydrogenation flow rate, but also achieve precise control of the liquid hydrogen filling amount.

[0004] The above-mentioned existing hydrogen filling system, its components such as filters, liquid hydrogen flow meters and their connecting pipelines are mostly transmission equipment exposed to the air. Since hydrogen is a flammable gas, once a hydrogen leak occurs, it is easy to cause safety problems such as fire. In particular, the sealing rings at the connecting flanges between the pipelines and components are prone to failure due to aging, and the phenomenon of hydrogen leakage is more obvious.

[0005] Therefore, it is necessary to design a new type of hydrogen filling and metering system to solve the above-mentioned technical problems. Utility Model Content

[0006] The technical problem to be solved by the present invention is to provide a hydrogen filling and metering system in view of the above-mentioned deficiencies in the prior art, which can effectively improve the safety of the hydrogen filling and metering system.

[0007] The technical solution of the present utility model is as follows: a hydrogen filling and metering system, comprising a filter, a liquid hydrogen flowmeter, a flow control valve and a controller, wherein the filter, liquid hydrogen flowmeter and flow control valve are connected in sequence through pipelines, and the liquid hydrogen flowmeter and flow control valve are both electrically connected to the controller, and further comprising a cabinet, the inner cavity of the cabinet being divided into two mutually independent first and second cavities by a partition, the filter, liquid hydrogen flowmeter and flow control valve are all installed in the first cavity, the liquid hydrogen inlet of the filter is connected to the liquid hydrogen outlet of the liquid hydrogen storage tank through a pipeline running through the cabinet, the liquid hydrogen outlet of the flow control valve is connected to a liquid filling gun through a pipeline running through the cabinet, the controller is installed in the second cavity, a hydrogen sensor is provided in the first cavity, an alarm is provided on the top of the cabinet, the hydrogen sensor and alarm are both electrically connected to the controller, and a first inspection door is detachably installed on one side of the cabinet corresponding to the first cavity.

[0008] As a further improvement, the hydrogen sensor is fixed on one side of the partition, and the filter, liquid hydrogen flow meter, and flow control valve are all connected to one side of the partition via a connecting rod.

[0009] Furthermore, an exhaust fan is installed on the cabinet corresponding to the top of the first cavity, and the air inlet of the exhaust fan is connected to a connecting pipe extending into the first cavity. A first switch valve is provided on the connecting pipe. The exhaust fan and the first switch valve are both electrically connected to the controller, and the air outlet of the exhaust fan is connected to the hydrogen processing device through a pipeline.

[0010] Furthermore, a bypass pipe is connected to one side of the connecting pipe, an air inlet end of the bypass pipe passes through the partition and extends into the second cavity, a second switch valve is provided on the bypass pipe, and the second switch valve is electrically connected to the controller.

[0011] Furthermore, a vent hole is provided at the lower portion of the cabinet corresponding to the second cavity, and a filter is installed in the vent hole.

[0012] Furthermore, the controller is fixed on the other side of the partition, and a second inspection door is detachably installed on the other side of the cabinet corresponding to the second cavity.

[0013] Furthermore, the first inspection door and the second inspection door are both connected to the cabinet body via a plurality of hexagon socket screws.

[0014] Furthermore, sealing gaskets are provided between the first inspection door, the second inspection door and the cabinet body.

[0015] Furthermore, the hydrogen filling metering system also includes a display screen and an input keyboard. The display screen and the input keyboard are both embedded in the second inspection door, and the display screen and the input keyboard are both electrically connected to the controller.

[0016] Furthermore, a hook for hanging a liquid adding gun is provided on one side of the cabinet.

[0017] Beneficial effects

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The hydrogen filling and metering system of the present invention encapsulates the filter, liquid hydrogen flow meter, flow control valve and corresponding pipelines in a closed first cavity. Once hydrogen leaks, it will not be discharged into the atmosphere immediately, but will stay in the first cavity for a short time and be detected in real time by the hydrogen sensor. Once hydrogen leakage is detected, the alarm will sound, prompting the staff to shut down the machine for maintenance, which can effectively improve the safety of the hydrogen filling and metering system.

[0020] 2. The hydrogen filling and metering system of the present invention has a cabinet divided into two independent cavities by a partition, which facilitates the installation of the filter, liquid hydrogen flow meter, flow control valve and controller in different cavities. The control components and the actuators are installed separately to avoid the heat generated by the controller from being collected in the liquid hydrogen transmission equipment and affecting the transmission, further improving the safety of use and facilitating separate inspection and maintenance.

[0021] 3. The hydrogen filling and metering system of the present invention is equipped with an exhaust fan on the cabinet. When the transmission equipment is inspected and maintained, the exhaust fan can be used to extract the air in the first cavity to form an air circulation environment, thereby avoiding the impact of excessive hydrogen concentration on maintenance personnel and further improving the safety of maintenance. At the same time, during the application process, the exhaust fan can also be used to extract the air in the second cavity to form an air circulation environment, thereby avoiding the problem of excessive temperature in the second cavity and further improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0024] Figure 2 This is a side structural diagram of the present utility model;

[0025] Figure 3 It is a side cross-sectional structural schematic diagram of the utility model;

[0026] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A.

[0027] Among them: 1-filter, 2-liquid hydrogen flowmeter, 3-flow control valve, 4-controller, 5-cabinet, 6-partition, 7-first cavity, 8-second cavity, 9-filling gun, 10-hydrogen sensor, 11-alarm, 12-first inspection door, 13-connecting rod, 14-exhaust fan, 15-connecting pipe, 16-first switch valve, 17-bypass pipe, 18-second switch valve, 19-filter, 20-second inspection door, 21-hexagon socket screw, 22-sealing gasket, 23-display screen, 24-input keyboard, 25-hook. DETAILED DESCRIPTION

[0028] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0029] In the description of this disclosure, it is to be understood that the terms "upper" and "lower" indicate positions or locations based on the Figure 1 The directions of the drawings shown are defined solely for the purpose of facilitating and simplifying the description of the present disclosure. They do not indicate or imply that the devices or elements referred to must have a specific orientation, configuration, or operation in a specific orientation. Therefore, they should not be construed as limiting the present disclosure. Furthermore, the terms "inside" and "outside" refer to the inside and outside of the corresponding structural outlines. Furthermore, the terms "first," "second," etc., are used solely to distinguish one element from another and do not convey order or importance.

[0030] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "disposed," "connected," "connected," and "installed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections via an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0031] See Figure 1-4The utility model provides a hydrogen filling and metering system, including a filter 1, a liquid hydrogen flowmeter 2, a flow control valve 3 and a controller 4, wherein the filter 1, the liquid hydrogen flowmeter 2, and the flow control valve 3 are connected in sequence through pipelines, and are liquid hydrogen transmission equipment. The liquid hydrogen flowmeter 2 and the flow control valve 3 are both electrically connected to the controller 4, which facilitates the calculation of the liquid hydrogen filling amount and the control of the circulation and closing during liquid hydrogen filling. The hydrogen filling and metering system also includes a cabinet 5, the inner cavity of the cabinet 5 is divided into two independent first cavities 7 and second cavities 8 by a partition 6. The first cavity 7 and the second cavity 8 are both relatively sealed cavities. The partition 6 can be a hollow structure plate, which plays a certain heat insulation role. At the same time, the inner cavity of the partition 6 can be filled with some heat insulation cotton to further improve the heat insulation effect. The filter 1, liquid hydrogen flowmeter 2, and flow control valve 3 are all installed in the first cavity 7, and the controller 4 is installed in the second cavity 8. The cabinet 5 is divided into two independent cavities by the partition 6, which is convenient for installing the filter 1, liquid hydrogen flowmeter 2, flow control valve 3 and controller 4 in different cavities, and the control components and the actuators are installed separately to avoid the heat generated by the controller 4 from accumulating in the liquid hydrogen transmission equipment and affecting the transportation, further improving the safety of use, and convenient for separate inspection and maintenance. The liquid hydrogen inlet of the filter 1 is connected to the liquid hydrogen outlet of the liquid hydrogen storage tank via a pipe running through the cabinet 5. The liquid hydrogen outlet of the flow control valve 3 is connected to a liquid filling gun 9 via a pipe running through the cabinet 5. The liquid filling gun 9 can be connected to the liquid hydrogen inlet of the vehicle to achieve liquid hydrogen filling. A hydrogen sensor 10 is provided in the first cavity 7 to detect the hydrogen concentration. An alarm 11 is provided on the top of the cabinet 5. The alarm 11 can be an audible and visual alarm to alert personnel. The hydrogen sensor 10 and alarm 11 are both electrically connected to the controller 4 to achieve automatic detection and prompting. A first inspection door 12 is removably installed on the side of the cabinet 5 corresponding to the first cavity 7 to facilitate personnel to inspect and repair the liquid hydrogen transmission equipment.

[0032] The hydrogen filling and metering system of the present invention encapsulates the filter 1, the liquid hydrogen flowmeter 2, the flow control valve 3 and the corresponding pipelines in a closed first cavity 7. Once the hydrogen leaks, it will not be discharged into the atmosphere immediately, but will stay in the first cavity 7 for a short time and be detected in real time by the hydrogen sensor 10. Once the hydrogen leak is detected, the alarm 11 will sound an alarm to prompt the staff to shut down the machine for maintenance, which can effectively improve the safety of the hydrogen filling and metering system.

[0033] Preferably, the hydrogen sensor 10 is fixed on one side of the partition 6 to achieve the installation and fixation of the hydrogen sensor 10. The filter 1, the liquid hydrogen flowmeter 2, and the flow control valve 3 are all connected to one side of the partition 6 through a connecting rod 13, thereby improving the installation stability of the filter 1, the liquid hydrogen flowmeter 2, and the flow control valve 3.

[0034] Preferably, an exhaust fan 14 is installed on the cabinet 5 corresponding to the top of the first cavity 7. The air inlet of the exhaust fan 14 is connected to a connecting pipe 15 extending into the first cavity 7. The connecting pipe 15 is provided with a first on-off valve 16. The exhaust fan 14 and the first on-off valve 16 are both electrically connected to the controller 4. The air outlet of the exhaust fan 14 is connected to a hydrogen processing device via a pipeline. The hydrogen processing device can be a combustion chamber or a treatment tank filled with a neutralizing liquid. By installing the exhaust fan 14 on the cabinet 5, the exhaust fan 14 can be used to extract the air in the first cavity 7, forming an air circulation environment, avoiding the impact of excessive hydrogen concentration on maintenance personnel, and further improving the safety of maintenance.

[0035] Preferably, a bypass pipe 17 is further connected to one side of the connecting pipe 15. The air inlet end of the bypass pipe 17 passes through the partition 6 and extends into the second cavity 8. A second on-off valve 18 is provided on the bypass pipe 17 and is electrically connected to the controller 4. The exhaust fan 14 can be used to extract the air in the second cavity 8, forming an air circulation environment, avoiding the problem of overheating of the second cavity 8, and further improving the safety of use.

[0036] In this embodiment, through the arrangement of the exhaust fan 14 and the first switch valve 16, the second switch valve 18 and other components, during the application process, the first switch valve 16 is closed and the second switch valve 18 is opened, and the exhaust fan 14 extracts the air in the second cavity 8 to achieve the purpose of heat dissipation of the second cavity 8; when the transmission equipment is inspected and maintained, the second switch valve 18 is closed and the first switch valve 18 is opened, and the exhaust fan 14 extracts the air in the first cavity 7 to achieve the purpose of safe inspection and maintenance.

[0037] Preferably, a vent is provided at the lower portion of the cabinet 5 corresponding to the second cavity 8 to facilitate external airflow to enter the second cavity 8, thereby forming a circulating airflow. A filter 19 is installed in the vent to prevent debris from entering the second cavity 8.

[0038] Preferably, the controller 4 is fixed on the other side of the partition 6 so that the front of the controller 4 faces the second inspection door 20, and the second inspection door 20 is detachably installed on the other side of the cabinet 5 corresponding to the second cavity 8, which facilitates inspection and maintenance of the controller 4.

[0039] Preferably, the first inspection door 12 and the second inspection door 20 are both connected to the cabinet 5 via a plurality of hexagon socket screws 21 , thereby enabling quick assembly and disassembly of the first inspection door 12 and the second inspection door 20 .

[0040] Preferably, a sealing gasket 22 is provided between the first inspection door 12, the second inspection door 20 and the cabinet body 5 to improve the sealing performance of the two cavities.

[0041] Preferably, the hydrogen filling metering system also includes a display screen 23 and an input keyboard 24, wherein the display screen 23 includes a tube bundle vehicle water volume display module, a pre-filling temperature display module, a post-filling temperature display module, a pre-filling pressure display module, a post-filling pressure display module and a filling quantity display module, and the input keyboard 24 includes a water volume input button, a start temperature input button, a start pressure input button, an end temperature input button, an end pressure input button, a digital input button and a confirm input button. The display screen 23 and the input keyboard 24 are both embedded in the second inspection door 20, and the display screen 23 and the input keyboard 24 are both electrically connected to the controller 4, which is convenient for the staff to input data information and display the liquid hydrogen filling information so as to understand the filling status and make it more convenient to use.

[0042] Preferably, a hook 25 for hanging the liquid adding gun 9 is further provided on one side of the cabinet 5 to facilitate taking and placing the liquid adding gun 9.

[0043] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0044] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0045] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A hydrogen filling metering system, comprising a filter (1), a liquid hydrogen flow meter (2), a flow control valve (3) and a controller (4), wherein the filter (1), the liquid hydrogen flow meter (2) and the flow control valve (3) are sequentially connected through pipelines, and the liquid hydrogen flow meter (2) and the flow control valve (3) are electrically connected to the controller (4), characterized in that: The invention also includes a cabinet (5), the inner cavity of the cabinet (5) is divided into two independent first cavities (7) and second cavities (8) by a partition (6), the filter (1), the liquid hydrogen flow meter (2), and the flow control valve (3) are all installed in the first cavity (7), the liquid hydrogen inlet of the filter (1) is connected to the liquid hydrogen outlet of the liquid hydrogen storage tank through a pipeline running through the cabinet (5), the liquid hydrogen outlet of the flow control valve (3) is connected to a liquid adding gun (9) through a pipeline running through the cabinet (5), the controller (4) is installed in the second cavity (8), a hydrogen sensor (10) is provided in the first cavity (7), an alarm (11) is provided on the top of the cabinet (5), the hydrogen sensor (10) and the alarm (11) are both electrically connected to the controller (4), and a first inspection door (12) is detachably installed on one side of the cabinet (5) corresponding to the first cavity (7).

2. A hydrogen filling and metering system according to claim 1, characterized in that: The hydrogen sensor (10) is fixed to one side of the partition (6), and the filter (1), liquid hydrogen flow meter (2), and flow control valve (3) are all connected to one side of the partition (6) via a connecting rod (13).

3. A hydrogen filling and metering system according to claim 1, characterized in that: An exhaust fan (14) is installed on the cabinet (5) corresponding to the top of the first cavity (7), and the air inlet of the exhaust fan (14) is connected to a connecting pipe (15) extending into the first cavity (7), and a first switch valve (16) is provided on the connecting pipe (15). The exhaust fan (14) and the first switch valve (16) are both electrically connected to the controller (4), and the air outlet of the exhaust fan (14) is connected to the hydrogen processing device through a pipeline.

4. A hydrogen filling and metering system according to claim 3, characterized in that: One side of the connecting pipe (15) is also connected to a bypass pipe (17), an air inlet end of the bypass pipe (17) passes through the partition (6) and extends into the second cavity (8), and a second switch valve (18) is provided on the bypass pipe (17), and the second switch valve (18) is electrically connected to the controller (4).

5. A hydrogen filling and metering system according to claim 4, characterized in that: A vent hole is provided at the lower portion of the cabinet (5) corresponding to the second cavity (8), and a filter (19) is installed in the vent hole.

6. A hydrogen filling and metering system according to claim 1, characterized in that: The controller (4) is fixed on the other side of the partition (6), and a second inspection door (20) is detachably installed on the other side of the cabinet (5) corresponding to the second cavity (8).

7. A hydrogen filling and metering system according to claim 6, characterized in that: The first inspection door (12) and the second inspection door (20) are both connected to the cabinet (5) via a plurality of hexagon socket screws (21).

8. A hydrogen filling and metering system according to claim 6, characterized in that: Sealing gaskets (22) are provided between the first inspection door (12), the second inspection door (20) and the cabinet body (5).

9. A hydrogen filling and metering system according to claim 6, characterized in that: The hydrogen filling metering system further includes a display screen (23) and an input keyboard (24). The display screen (23) and the input keyboard (24) are both embedded in the second inspection door (20), and the display screen (23) and the input keyboard (24) are both electrically connected to the controller (4).

10. A hydrogen filling and metering system according to any one of claims 1 to 9, characterized in that: A hook (25) for hanging a liquid adding gun (9) is also provided on one side of the cabinet (5).

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