JP3102605U - Hydrogen station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydrogen station provided with a hydrogen flame detector for detecting generation of a flame by hydrogen by detecting ultraviolet rays emitted from a flame of hydrogen.
A container capable of transmitting ultraviolet light is provided, and the container includes an airtightly sealed inert gas, a cathode, and an anode, and a space between the cathode and the anode is provided outside the container. An arbitrary pulse voltage is applied by the control unit, and a flame detector for a hydrogen station that detects the occurrence of a flame by using a photoelectric effect of ultraviolet rays, and hydrogen that measures liquid hydrogen and compressed hydrogen and supplies the vehicle to a vehicle. A supply unit, a storage unit that stores the liquid hydrogen or the compressed hydrogen, a control unit that controls the flame detection unit, and controls operations of the hydrogen supply unit, the storage unit, the flame detection unit, and the control unit. A hydrogen station comprising a management unit.
[Selection] Figure 2

Description

  The present invention relates to a flame detector for detecting a flame of hydrogen and a hydrogen station including the same.

  In recent years, global warming due to the influence of carbon dioxide has become a major problem. In various fields, measures are being taken to reduce carbon dioxide emissions. One example is the conversion of automobile engines to hydrogen engines. A hydrogen engine is an engine that obtains driving power by burning hydrogen instead of gasoline.Since the substance emitted after combustion in the engine is almost only water, the next generation is excellent in terms of environmental protection The effect as an engine is greatly expected.

Now, the hydrogen engine obtains the driving force by burning the fuel, similarly to the gasoline engine. The fuel in the hydrogen engine is hydrogen, and the fuel decreases as the vehicle continues to run, similarly to the gasoline engine. Therefore, it is necessary to supply hydrogen to continue running.
In view of the above, in order for automobiles using a hydrogen engine to spread, maintenance of a hydrogen station for replenishing hydrogen is indispensable.

If a hydrogen station is installed here, a large amount of hydrogen is stored in the hydrogen station. And, like gas stations that are now widespread, it is necessary to take sufficient measures against fire. In recent years, ignition accidents at gas stations due to static electricity and the like have actually occurred. Is very large.
As one of measures against this problem, an infrared sensor is installed in an existing gas station (see Japanese Patent Application Laid-Open No. 10-139100). An infrared sensor is a configuration that detects a flame by sensing infrared rays radiated from a heat source of the flame. By installing an infrared sensor, it is possible to detect the ignition in the initial state, and it is possible to take a quick response, and as a result, it is very useful for preventing secondary disasters.
However, it is difficult for this infrared sensor to detect the flame of hydrogen. This is because hydrogen flames are almost colorless and do not emit infrared radiation.
JP-A-10-139100

  In order to solve such inconveniences, an object of the present invention is to provide a hydrogen flame detector that detects generation of a flame due to hydrogen by detecting ultraviolet rays emitted from a flame of hydrogen at a hydrogen station. I do.

  It is another object of the present invention to provide a hydrogen station provided with the hydrogen flame detector.

  In order to achieve the above object, the invention of claim 1 includes a container capable of transmitting ultraviolet light, wherein the container includes an airtightly sealed inert gas, a cathode, and an anode, A flame detector for a hydrogen station, wherein an arbitrary pulse voltage is applied between a cathode and an anode by a control unit provided outside the container.

  According to a second aspect of the present invention, there is provided a hydrogen supply means for measuring and supplying liquid hydrogen and compressed hydrogen to a vehicle, a storage unit for storing the liquid hydrogen or compressed hydrogen, and detecting a flame by sensing ultraviolet rays. A hydrogen station comprising: a flame detection unit, a control unit that controls the flame detection unit, and a management unit that controls operations of the hydrogen supply unit, the storage unit, the flame detection unit, and the control unit. is there.

  More preferably, the flame detecting means is a flame detector for a hydrogen station according to claim 1.

  According to the above-mentioned present invention, a hydrogen station is provided that is capable of detecting fires of hydrogen that are difficult to detect with the naked eye or infrared sensors. Can be provided.

  Hereinafter, the flame detector and the hydrogen station of the present invention will be described with reference to the drawings.

  FIG. 1 shows a flame detector 1. The outside is covered with quartz glass 2. Inside the quartz glass 2, a cathode (photocathode) 3 and an anode 4 that are sensitive only to ultraviolet rays are arranged separately, and a gas such as argon is sealed therein. Conductive wires are connected to the cathode 3 and the anode 4, respectively. These conductive wires extend from the bottom of the quartz glass 2 to the outside, and are connected to the control unit 5.

The flame detector 1 according to the present invention detects the occurrence of a flame by a photoelectric effect. The principle of operation is as follows.
In the flame detector 1, a pulse voltage is applied in advance between a cathode (photocathode) 3 and an anode 4 which are sensitive only to ultraviolet rays. In this state, when a flame due to hydrogen is generated within the effective detection range of the flame detector 1, ultraviolet rays are emitted from the flame. When the emitted ultraviolet rays enter the cathode 3 of the flame detector, photoelectrons are emitted from the cathode 3 by a photoelectric effect. Photoelectrons are attracted to the anode 4 by the electric field. Here, when the applied voltage is increased and the electric field is increased, the photoelectrons are sufficiently accelerated to collide with gas molecules in the tube to ionize them. Of the electrons and positive ions generated by ionization, the electrons repeatedly collide with and ionize other gas molecules and reach the anode 4. On the other hand, positive ions are accelerated toward the cathode 3 and collide with the cathode 3 to generate many secondary electrons. By this repetition, a large current suddenly flows between the cathode 3 and the anode 4, and a discharge state occurs.

  When the discharge current reaches a certain condition, the control unit 5 outputs a result of "flame detection", but this condition can be changed by the control unit 5. Specifically, as the “flame detection” output condition, for example, a condition that “a result of“ flame detection ”is output when a discharge current of 50 mA is detected over 10 steps” is considered. It is possible to change “10” of “10 steps” to “5” or change “50” of “50 mA” to “100”. Other parameters that can be changed include a pulse voltage waveform, a pulse width and a cycle, and the like.

By performing such a setting change, the flame detector 1 can detect only the ultraviolet rays radiated from the hydrogen flame. This is because the flame detector 1 of this embodiment outputs "flame detection" by detecting ultraviolet rays as described above, and cannot determine whether the source of the ultraviolet rays is a flame. Because. An example of this is lightning.
When lightning strikes, the ultraviolet light contained in the lightning light is emitted. Then, it is assumed that the discharge current is detected in only one step by this ultraviolet light being incident on the flame detector 1 of the present application. At this time, if the minimum number of steps is not set as a condition for outputting “flame detection”, the control unit 5 outputs “flame detection” by detecting one step at the time of lightning occurrence. .
However, if the output condition is set such that "if a discharge current is detected continuously for 5 or more steps, the result of" flame detection "is output", malfunction of "flame detection" due to lightning in this example will occur. do not do.
There are many other factors that affect the output conditions, such as sunlight and halogen lamps. Therefore, the output conditions need to be appropriately changed depending on the use environment.

FIG. 2 is a schematic configuration diagram showing an embodiment of a hydrogen station provided with the flame detector 1. FIG. 3 is a block diagram showing an embodiment of the hydrogen station according to the present invention.
The hydrogen station 6 mainly includes a hydrogen supplier 7 for supplying hydrogen, a flame detector 1 for detecting a flame, and a controller 5 for controlling the flame detector 1. In addition, a storage tank 8 for storing hydrogen and a hydrogen purifier 9 are provided in an underground portion of the hydrogen station 6. And the management part 10 which controls operation | movement of these facilities is provided. The management unit 10 is further connected to a line network such as a telephone line and the Internet.

  Hydrogen is purified by the hydrogen purifier 9 and stored in the storage tank 8. As a storage method, there are a method of storing compressed hydrogen and a method of using a hydrogen storage alloy. Then, the hydrogen is supplied to a vehicle such as a hydrogen engine automobile by the hydrogen supplier 7.

  In this embodiment, the flame detector 1 is installed at a location as shown in FIG. Further, since the effective range of the flame detector in which the flame can be detected is limited, the number of the installed flame detectors is appropriately changed according to the size of the hydrogen station.

As described above, the result of “flame detection” is output to the management unit 10 by the control unit 5, and the management unit 10 stops the hydrogen supply operation of the hydrogen supply unit 2, for example, in response to this output. Good. With such a configuration, it is possible to prevent the damage from spreading.
It is also conceivable that the management unit 10 is configured to warn the neighborhood of danger using light and sound. Specifically, it is conceivable to operate a rotating light, a siren, or the like. By adopting such a configuration, it is possible to warn nearby residents of danger and call for quick evacuation, thereby preventing the spread of damage.

It is a perspective view showing an example of an embodiment of a flame detector of the present invention. 1 is an external view showing an example of an embodiment of a hydrogen station according to the present invention. It is a block diagram showing an example of an embodiment of implementing a hydrogen station of the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Flame detector 2 Quartz glass 3 Cathode 4 Anode 5 Control part 6 Hydrogen station 7 Hydrogen supply

Claims (3)

Equipped with a container that can transmit ultraviolet light,
In the container,
An inert gas hermetically sealed,
A cathode,
With an anode,
An arbitrary pulse voltage is applied between the cathode and the anode by a control unit provided outside the container. The flame detector for a hydrogen station. Hydrogen supply means for measuring liquid hydrogen and compressed hydrogen and supplying it to the vehicle,
A storage unit for storing the liquid hydrogen or compressed hydrogen,
Flame detection means for detecting a flame by sensing ultraviolet rays,
A control unit for controlling the flame detection means,
A hydrogen station comprising: a management unit that controls operations of the hydrogen supply unit, the storage unit, the flame detection unit, and the control unit. The hydrogen station according to claim 2, wherein the flame detecting means is the flame detector for a hydrogen station according to claim 1.

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