Hydrogen stations and disaster prevention methods for hydrogen stations

Abstract

To improve safety properties of a hydrogen station, shorten a required safety distance from a road and a boundary for relaxing constraint of a construction site and an area, and surely protect from fire or the like in a neighborhood so as to prevent significant cost increase.SOLUTION: A hydrogen station comprises: a dispenser 14 for supplying hydrogen; and a disaster prevention facility for protecting a prescribed protection object section including an installation area of the dispenser 14, where the disaster prevention facility comprises: a partition sheet 56 for surrounding and partitioning the protection object section; and a plurality of dispersing means which includes first fire fighting means for dispersing a fire retardant into the protection object section partitioned by the partition sheet 56 and disperses a prescribed substance to a prescribed area to cope with an abnormal event which has occurred. The hydrogen station comprises a plurality of operation patterns which selectively operates the plurality of dispersing means according to an occurrence position of the abnormal event or a kind of the abnormal event, and, in the occurrence of the abnormal event, the plurality of dispersing means including the first fire fighting means is operated in an operation pattern coping with the occurrence position of the abnormal event occurred, or the kind of the abnormal event.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a hydrogen station equipped with a dispenser that supplies hydrogen and disaster prevention equipment that protects a predetermined protected area including the area in which the dispenser is installed, and a disaster prevention method for the hydrogen station. [Background technology]

[0002] As a technology to reduce the burden on the environment, the government has indicated its policy to develop and popularize electric vehicles and fuel cell vehicles in place of gasoline-powered vehicles that use fossil fuels, and it is expected that eco-cars will rapidly spread throughout society in the future. While the spread of charging facilities is essential as infrastructure for the popularization of electric vehicles, the installation of hydrogen stations is essential for fuel cell vehicles.

[0003] There are two types of hydrogen stations: those equipped with hydrogen production equipment (on-site hydrogen stations) and those that do not have hydrogen production equipment but receive hydrogen from hydrogen production facilities or on-site hydrogen stations, etc., and store it under pressure (off-site hydrogen stations).

[0004] Furthermore, in order to promote the widespread use of hydrogen stations, the use of spaces adjacent to public roads, especially the establishment of stations adjacent to gas stations, is seen as a particularly concrete path forward.

[0005] On the other hand, considering the dangers of hydrogen, ensuring the safety of nearby schools, hospitals, homes, etc. in the unlikely event of an accident is an important requirement. For this reason, hydrogen stations that have facilities for producing, storing, and handling hydrogen are generally required to install disaster prevention equipment such as gas detectors, fire (flame) detectors, and water spray equipment. Furthermore, they are required to install disaster prevention devices such as emergency shutoff valves in case of a leakage accident and temperature rise prevention devices, and safety distances from public roads and property boundaries are specified in the unlikely event of a fire.

[0006] When hydrogen cylinder filling pressure was initially 40 MPa (automobile filling pressure 35 MPa), the distance from the public road of the hydrogen equipment (e.g., dispenser) was 6 m, and the distance from the site boundary was also 6 m. However, in order to extend the distance that can be traveled on a single fill-up of hydrogen, the hydrogen cylinder filling pressure has now been increased to 82 MPa (automobile filling pressure 70 MPa). As a result, larger amounts of hydrogen are now stored and handled than originally, and taking into consideration the increased risk in the event of an accident, the distance from the public road and the distance from the site boundary have been increased to 8 m. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2017-038789 A [Patent Document 2] JP 2017-032126 A [Patent Document 3] JP 2012-066086 A [Patent Document 4] JP 2018-079704 A [Patent Document 5] Japanese Patent Application Publication No. 06-070991 Summary of the Invention [Problem to be solved by the invention]

[0008] However, in order to ensure a safe distance for a hydrogen station, a considerable amount of land is required, which is particularly difficult to secure in urban areas such as the Tokyo, Chubu, and Kinki regions. Furthermore, for hydrogen stations that are attached to gasoline or other fueling stations (service stations: SS), ensuring a safe distance is a strict constraint on construction.

[0009] Furthermore, while the current disaster prevention equipment is mainly for fires and leaks within hydrogen stations, it is necessary to protect hydrogen stations from fires at gasoline and other refueling stations in combined hydrogen stations, fires in the neighborhood, and car accidents and vehicle fires on public roads, and from this perspective, the current disaster prevention equipment is not sufficient.However, the construction of a hydrogen station requires several times the cost of a gasoline and other refueling station, and the installation of excessive disaster prevention equipment on top of that will be a hindrance in terms of cost, so cost reduction is also a major factor in promoting the spread of hydrogen stations.

[0010] The present invention aims to provide a hydrogen station that is equipped with disaster prevention equipment that improves safety, shortens the required safety distance from roads and site boundaries, alleviates construction site and area constraints, and provides reliable protection from nearby fires, etc., without significantly increasing costs, and a disaster prevention method for such a hydrogen station. [Means for solving the problem]

[0011] (Hydrogen Station 1) The present invention relates to a hydrogen station, A dispenser for supplying hydrogen; Disaster prevention equipment for protecting a predetermined protected area including an installation area of ​​the dispenser; Equipped with Disaster prevention equipment: A partitioning means for surrounding and partitioning the area to be protected when a predetermined abnormal event occurs; A plurality of spraying means for spraying a predetermined substance to a predetermined area in order to deal with an abnormal event that has occurred, the spraying means including a first extinguishing means for spraying a fire extinguishing agent in a protected compartment separated by a partitioning means; Equipped with A plurality of operation patterns are provided for selectively operating the plurality of scattering means in response to the location where the abnormal event has occurred; When an abnormal event occurs, a plurality of dispersing means including the first fire extinguishing means operate in an operation pattern corresponding to the location where the abnormal event has occurred.

[0012] (Hydrogen Station 2) The present invention relates to a hydrogen station, A dispenser for supplying hydrogen; Disaster prevention equipment for protecting a predetermined protected area including an installation area of ​​the dispenser; Equipped with Disaster prevention equipment: A partitioning means for surrounding and partitioning the area to be protected when a predetermined abnormal event occurs; A plurality of spraying means for spraying a predetermined substance to a predetermined area in order to deal with an abnormal event that has occurred, the spraying means including a first extinguishing means for spraying a fire extinguishing agent in a protected compartment separated by a partitioning means; Equipped with A plurality of operation patterns are provided for selectively operating the plurality of scattering means in response to the type of abnormal event; When an abnormal event occurs, the plurality of dispersing means including the first fire extinguishing means operate in an operation pattern corresponding to the abnormal event that has occurred.

[0013] (Cooling means, second extinguishing means and upward spraying means) The multiple spraying means of the disaster prevention equipment include, in addition to the first fire extinguishing means, at least one of a cooling means for spraying a coolant onto the partitioning means that separates the protected compartment, a second fire extinguishing means for spraying a fire extinguishing agent onto the outside of the protected compartment separated by the partitioning means, and an upward spraying means for spraying a specified leaked hydrogen exhaust promoter from the bottom to the top of the space within the protected compartment.

[0014] (Hydrogen Station 3) The present invention relates to a hydrogen station, A dispenser for supplying hydrogen; Disaster prevention equipment for protecting a predetermined protected area including an installation area of ​​the dispenser; Equipped with Disaster prevention equipment: A partitioning means for surrounding and partitioning the area to be protected when a predetermined abnormal event occurs; A first extinguishing means for spraying a fire extinguishing agent into a protected compartment separated by the partition means; Equipped with The partition means is characterized in that it holds the partition sheet in a non-deployed state under normal circumstances, and releases the partition sheet and deploys it downwards when a specified abnormal event occurs.

[0015] (Hydrogen Station 4) The present invention relates to a hydrogen station, A dispenser for supplying hydrogen; Disaster prevention equipment for protecting a predetermined protected area including an installation area of ​​the dispenser; Equipped with Disaster prevention equipment: A partitioning means for surrounding and partitioning the area to be protected when a predetermined abnormal event occurs; a first extinguishing means for spraying either or both of a predetermined leaked hydrogen discharge promoting gas and a fire extinguishing agent into a protected compartment separated by a partition means; Equipped with The first fire extinguishing means is When a hydrogen leak occurs in the protected area as a specified abnormal event and the leaked hydrogen concentration satisfies a specified third concentration condition, a leaked hydrogen exhaust promoting gas is sprayed; When the leaked hydrogen concentration meets the specified fourth concentration condition, which is stricter than the third concentration condition, the extinguishing agent is of, Alternatively, the fire extinguishing agent and the gas for promoting the discharge of leaked hydrogen are both sprayed.

[0016] The concentration conditions for the leaked hydrogen concentration at the hydrogen station 4 are referred to as a "third concentration condition" and a "fourth concentration condition," which are the same names as those used in the description of the embodiment.

[0017] The present invention also covers a "hydrogen station disaster prevention method" corresponding to hydrogen stations 1 to 4. Effect of the Invention

[0018] (Effects of Hydrogen Stations 1 and 2) In the hydrogen stations 1 and 2 of the present invention, when an abnormal event occurs at the hydrogen station or its vicinity, the protected area including the installation area of ​​the dispenser is enclosed from the surrounding area to form a partitioned area, thereby containing the abnormal event that occurs within the protected area and suppressing its impact on the surrounding area. In addition, the protected area is protected from an abnormal event that occurs outside the protected area.

[0019] In addition, by dispersing a fire extinguishing agent by the first extinguishing means within the protected area separated by the partitioning means, the spread of an abnormal event occurring within the protected area is suppressed, while the influence of an abnormal event occurring outside the protected area is reduced. As a result, it is possible to shorten the required safety distance from roads and site boundaries, and to ease the constraints on hydrogen station construction.

[0020] In addition, since the dispersal means including the first extinguishing means operates in an operating pattern corresponding to the location of the abnormal event and the type of the abnormal event, it is possible to deal with the abnormal event that has occurred appropriately.

[0021] (Effect of Hydrogen Station 3) In the hydrogen station 3 of the present invention, for example, in the case of a fire shutter made of steel plate, if there is an obstacle on the floor, it will not descend to the floor and a gap will be created, which reduces the effectiveness of extinguishing a fire and preventing the spread of fire, etc. However, the partition sheet can prevent the occurrence of such gaps, and the degree of reduction in the effectiveness of extinguishing a fire and preventing the spread of fire, etc. In addition, when the partition sheet is deployed, it makes it easier for people to evacuate from the protected area.

[0022] (Effect of Hydrogen Station 4) In the hydrogen station 4 of the present invention, when the hydrogen concentration in the protected area is low, no fire extinguishing agent is sprayed, preventing water damage, etc., and the hydrogen concentration is diluted by spraying a leaking hydrogen exhaust promoter, for example an exhaust promotion gas, and if the hydrogen concentration does not decrease even after spraying the exhaust promotion gas, additional spraying of a fire extinguishing agent can be performed, thereby switching to more reliable protection. [Brief description of the drawings]

[0023] [Figure 1] A plan view of the facilities of a hydrogen station [Diagram 2] FIG. 1 is an explanatory diagram showing a first embodiment of a disaster prevention system for a hydrogen station. [Diagram 3] FIG. 1 is an explanatory diagram showing an embodiment of a seat deployment device installed in disaster prevention equipment at a hydrogen station; [Figure 4] An explanatory diagram showing the control system for the disaster prevention equipment of the hydrogen station in Figure 2. [Diagram 5] An explanatory diagram showing the operation of the disaster prevention equipment at a hydrogen station [Figure 6] FIG. 2 is an explanatory diagram showing a second embodiment of the disaster prevention equipment for a hydrogen station. [Figure 7] An explanatory diagram showing the control system of the disaster prevention equipment of the hydrogen station in Figure 6. [Figure 8] An explanatory diagram showing a sheet spreading device with a water filling tube provided around the sheet in the sheet spread state. [Figure 9] An explanatory diagram showing the operation of the disaster prevention equipment of a hydrogen station equipped with the seat deployment device of FIG. [Figure 10] FIG. 1 is an explanatory diagram showing a sheet spreading device having a discharge opening on the upper part of the sheet in a sheet spread state. [Figure 11] An explanatory diagram showing the operation of the fire prevention equipment of a hydrogen station that is equipped with the sheet deployment device of FIG. 10 and sprays fire extinguishing agent upward. [Figure 12] FIG. 1 is an explanatory diagram showing a control pattern for an abnormal event in a disaster prevention facility of a hydrogen station equipped with a first fire extinguishing means, a second fire extinguishing means, and a cooling means. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] [Basic Concept of the Embodiment] Figure 1 is an explanatory diagram showing the outline of the facilities of a hydrogen station in plan view. Note that a gasoline station or other refueling station that is attached to a hydrogen station is usually known as a service station (SS).

[0025] The basic concept of this embodiment is that when a specified abnormal event occurs at a hydrogen station 10B equipped with a dispenser 14 that supplies hydrogen to a vehicle (fuel cell vehicle), a partition section is formed by surrounding the protected area, including the installation area of ​​the dispenser 14 (dispenser installation area 14a), with a partition sheet. In other words, the partition is formed so that the area to be protected is contained within the partition area.

[0026] As a result, for example, if an abnormal event is a fire (compartment fire) within the protected compartment, the heat-insulating and flame-resistant properties of the partition sheet will prevent the fire from spreading to the surrounding area, and the smoke-proofing properties of the partition sheet will prevent smoke from spreading to the surrounding area, preventing damage, etc.

[0027] Also, for example, if the abnormal event is a nearby fire outside the protected area, the spread of the fire from the nearby fire into the protected space is similarly prevented, protecting, for example, the dispenser 14. In addition, since the partition sheet is a cloth-like material, it is easy for people to evacuate from the protected area.

[0028] The disaster prevention equipment of the hydrogen station 10B sprays a fire extinguishing agent into a protected area that is enclosed and partitioned by a partition sheet.

[0029] This promotes the discharge of hydrogen from within the protected area to the outside in the event of an abnormal event (before a fire occurs), preventing the hydrogen from filling up the inside. Also, by dispersing the fire extinguishing agent from the bottom to the top of the protected space, the effect of discharging hydrogen from the upper opening of the protected space into the air is increased, quickly diluting the hydrogen to a concentration below the lower explosion limit. This also effectively prevents hydrogen from leaking and filling up the surrounding area. It also cools the internal space, the dispenser, and the vehicle being filled with hydrogen, preventing the outbreak of a fire (ignition).

[0030] In addition, if the abnormal event is a compartment fire, the fire inside the protected compartment is extinguished, suppressed, or prevented from spreading, and the spread of the fire to the outside is prevented. At this time, the protected compartment is separated by a partition sheet, so that the extinguishing agent is efficiently sprayed inside the protected compartment without dispersing to the outside, increasing the extinguishing efficiency, and preventing water damage around the protected compartment.

[0031] If the abnormal event is a nearby fire or accident, the same action as described above will prevent the fire from spreading from the outside into the area to be protected.

[0032] Furthermore, the disaster prevention equipment of the hydrogen station 10B sprays a coolant, for example, cooling water, onto a partition sheet that separates the areas to be protected.

[0033] This cools the partition sheet, and the gaps in the weave of the cloth-like partition sheet are filled with the cooling water. Therefore, if the abnormal event is a compartment fire, the fire prevention, fire resistance, and heat resistance of the partition sheet are strengthened to protect the partition sheet, preventing deterioration of the partition state, and improving heat insulation, flame insulation, and smoke insulation to prevent fire spread to the outside and smoke leakage. Similarly, if the abnormal event is a nearby fire or accident, it prevents fire spread from the outside into the protected compartment and smoke inflow. In addition, spraying cooling water on the partition sheet increases its weight, so the partition sheet's deployment state is stable regardless of the abnormal event.

[0034] The disaster prevention equipment of the hydrogen station 10B combines the formation of partitions, the spraying of fire extinguishing agents, and the spraying of coolants, as described above. This provides the above-mentioned synergistic effects in an optimal manner in the event of various abnormal events.

[0035] With such a simple and easy configuration, the area to be protected can be protected more effectively and efficiently than in the past, and the surrounding area can also be protected, thereby shortening the required safety distance.

[0036] Here, the protected area of ​​hydrogen station 10B, which is surrounded and separated by a partition sheet, is an area (three-dimensional spatial area) that includes at least the area where dispenser 14 that supplies hydrogen to vehicles is installed, and any area within hydrogen station 10B can be the protected area as long as it includes dispenser installation area 14a.

[0037] In addition, the partition section is a section that includes the section to be protected, but it may be the same section as the section to be protected. Also, there may be multiple sections to be protected. Also, the number of dispensers installed in one section to be protected is arbitrary. This will be explained in detail below.

[0038] [Hydrogen station overview] As shown in Figure 1, the combined hydrogen station 10 is located within a site surrounded on three sides by a firewall 11 except for the part facing the road, and is divided by a boundary L into a gasoline or other refueling station (service station: SS) 10A and a hydrogen station 10B. Fixed refueling equipment 12 and the like are installed in the gasoline or other refueling station 10A, and dispensers 14 and the like are installed in the hydrogen station 10B.

[0039] This embodiment takes as an example a hydrogen station (on-site hydrogen station) 10B equipped with a hydrogen production device, in which a building separated by a firewall 15 on the rear side of the site is used as the hydrogen production area 10C, in which a hydrogen production device 22, a compressor 24 and storage equipment 25 are installed. Raw fuel is stored in a raw fuel tank 20 installed underground from an inlet 20a. The raw fuel is taken from the raw fuel tank 20 into the hydrogen production device 22 to generate hydrogen, which is compressed to a predetermined pressure by the compressor 24 and stored in the storage equipment 25. The hydrogen is then sent from the storage equipment 25 to a dispenser 14, and hydrogen can be supplied to and filled into fuel cell vehicles (FCVs) by, for example, 70 MPa differential pressure filling.

[0040] On the other hand, the gasoline filling station 10A has a fuel station 12a of the fixed fuel filling equipment 12 that allows gasoline to be filled into gasoline-powered vehicles, etc., and a fuel station 13a of the fixed fuel filling equipment 13 that allows kerosene to be filled into plastic tanks, etc., and further has an office 26, an automobile inspection and maintenance facility 28, and a car wash 30.

[0041] A roof 16 is provided on the fixed fueling equipment 12 installed at the gasoline or other fueling station 10A to protect it from rainwater. A roof 18 is also provided on the dispenser 14 installed at the hydrogen station 10B to protect it from rainwater, and the roof 18 of the dispenser 14 is designed to diffuse leaking and rising hydrogen into the atmosphere, so that rainwater cannot pass through from above, but air from below can escape upward.

[0042] [Outline of conventional disaster prevention equipment] In this embodiment, the hydrogen station 10B is provided with disaster prevention equipment including a fire alarm system.

[0043] The fire alarm system connects a fire detector 34 installed in the office 26 to a detector line pulled out from a fire receiving panel 32 installed in the office 26, and when a fire alert signal from the fire detector 34 is received by the fire receiving panel 32, a fire alarm is output and a report transfer signal is also output to other equipment.

[0044] The disaster prevention equipment is equipped with multiple water spray heads 48 to protect the storage equipment 25 installed in the hydrogen production area 10C, and a water supply piping is connected to the water spray heads 48 from the water spray pump equipment 44 installed in the gasoline or other fueling station 10A so that fire water can be supplied as a fire extinguishing agent. An emergency power supply equipment 46 is also installed for the water spray pump equipment 44 as a countermeasure against power outages.

[0045] The spraying of fire-fighting water from water spray head 48 by starting water spray pump equipment 44 is controlled by control panel 35 installed in office 26. Fire detector 36, hydrogen detector 38, temperature detector 40, and start-up device 42 installed in hydrogen station 10B and hydrogen production area 10C are connected to control panel 35 via signal lines. In addition, fire detector 36 and start-up device 42 are installed, for example, on the ceiling or a pillar near dispenser 14, and hydrogen detector 38 is installed inside the housing of dispenser 14.

[0046] When the control panel 35 determines that a fire has been detected by the fire detector 36, hydrogen has been detected by the hydrogen detector 38, a predetermined temperature has been detected by the temperature detector 40, the starter 42 has been operated, or a fire report signal has been received from the fire receiving panel 32, it outputs a pump start signal to the water spray pump equipment 44 to start the pump, and then sprays pressurized fire-extinguishing water from the water spray head 48 onto the storage equipment 25 to cool it and protect it from heat caused by the fire. Although not shown, fire extinguishers are provided at designated locations in the attached hydrogen station 10.

[0047] [First embodiment of disaster prevention equipment for hydrogen stations] (Overview of equipment configuration) FIG. 2 is an explanatory diagram showing a first embodiment of a disaster prevention system for a hydrogen station according to the present invention, showing the hydrogen station 10B of FIG. 1, with FIG. 2(A) showing an oblique view and FIG. 2(B) showing a front view.

[0048] Hydrogen station 10B is equipped with dispenser 14, and hydrogen is sent from storage facility 25 shown in FIG. 1 to dispenser 14, enabling fuel cell vehicles (FCVs) to be filled with hydrogen via a hose with a nozzle (not shown).

[0049] In this embodiment, the dispenser 14 is conceptually a facility portion that houses various components for supplying and filling hydrogen to a fuel cell vehicle (FCV) in a housing, and is equipped with a nozzle-equipped hose and an operation display unit. The hydrogen detector 38 is disposed in the housing of the dispenser 14.

[0050] A roof 18 having a known ventilation structure is attached to the top of the dispenser 14 by supports 54. In this embodiment, a sheet spreading device 50 is installed on each of the four sides of the roof 18, and further, a coolant spraying head 62 for spraying cooling water is provided.

[0051] The sheet deployment device 50 is activated by a control signal from the control panel 35 shown in FIG. 1 when a specified abnormal event such as a hydrogen leak, a compartment fire, a nearby fire, or a nearby accident occurs, and drops the partition sheet that is normally rolled up and held in place, deploying it vertically and vertically to surround the four sides of the area to be protected, including the dispenser installation area 14a, under the roof 18, thereby forming a partition area.

[0052] A fire extinguishing head 52 is disposed approximately in the center of the ceiling surface (underside of the roof 18) of the dispenser 14, and is capable of spraying fire extinguishing water supplied from the water spray pump equipment 44 in Fig. 1. In addition, a fire detector 36 is installed on the ceiling side, an activation device 42 is attached to a support 54, and a hydrogen detector 38 is further provided inside the dispenser 14.

[0053] (Sheet deployment device) FIG. 3 is an explanatory diagram showing an embodiment of a sheet deployment device installed in disaster prevention equipment at a hydrogen station, where FIG. 3(A) shows the normal state, FIG. 3(B) shows the deployed state of the partition sheet, and FIG. 3(C) shows a plan view from below.

[0054] As shown in Figure 3(A), the sheet deployment device 50 has an apparatus main body 55 fixed to the upper peripheral edge of the area to be protected, specifically the eaves side which is the peripheral edge of the roof covering the upper part of the dispenser 14, and one end edge of a partition sheet 56 fixed to the apparatus main body 55 by a sheet fixing part 57. At this time, the partition sheet 56 is wound up in a roll and held in a hanging state at two points, left and right, by holding members 58 made of wire or rope on the underside of the apparatus main body 55.

[0055] The partition sheet 56 is a cloth-like material having fireproofing, fire resistance, or heat resistance, and further having flame-blocking properties to block flames, heat-blocking properties to block heat, or smoke-blocking properties to block smoke, and can withstand high heat of, for example, 1200° C., and is also called a fire-resistant sheet, fire-resistant curtain, fire-resistant screen, etc. Note that the partition sheet 56 may be any material that has heat resistance of, for example, several hundred degrees or more, even if it is below 1200° C.

[0056] One end of the retaining member 58 using a wire or rope is fixed to the device body 55, and the other end is passed through the underside of the rolled partition sheet 56 and detachably held by a latch release unit 60 provided on the device body 55, and is normally prevented from coming off. The latch release unit 60 releases the latch by, for example, passing current through a solenoid in response to a control signal from the control panel 35 shown in FIG.

[0057] When the latch release section 60 of the sheet unfolding device 50 is activated by a control signal from the control panel 35, the retention of one end of the holding member 58 is released, and the partition sheet 56 falls under its own weight with one end edge of the partition sheet 56 fixed to the device body 55, as shown in Figure 3 (B), and is unfolded downward.

[0058] In this manner, by operating the four partition sheet deployment devices 50 shown in FIG. 6(A) to deploy the four partition sheets 56, a partition section can be formed and the area to be protected can be surrounded by the partition section.

[0059] Here, the length of the partition sheet 56 deployed as shown in Figure 3 (B) is measured to be longer than the installation height of the sheet deployment device 50 so that even if an object is placed on the road surface below the area to be protected, gaps are less likely to be created due to the sheet sagging when it is dropped and deployed.

[0060] The seat unfolding device 50 may have a structure in which the partition sheet 56 is wound around a rotating shaft, and the latch of the rotating shaft is released to allow the partition sheet 56 to fall and unfold under its own weight. Also, the seat unfolding device 50 may have a structure in which the partition sheet 56 is held in a bellows-like folded state, and released to allow the partition sheet 56 to fall and unfold.

[0061] The release of the partition sheet 56 in the sheet deployment device 50 may be by a heat-sensitive operation using a fusible link that releases the sheet by blowing a fuse exposed to heat from a fire, rather than by a control signal from the control panel 35. Also, a composite type that combines each method depending on the application, scale, and shape may be used.

[0062] (coolant dispersion head) As shown in Fig. 3, the sheet deployment device 50 is provided with a coolant spray head 62 on piping taken out on both sides of the device main body 55 (both sides of the deployed partition sheet 56). A water supply pipe 63 is connected to the coolant spray head 62 through the device main body 55 via an on-off valve 64, and the coolant spray head 62 receives a supply of fire-extinguishing water from the water spray pump equipment 44 shown in Fig. 1, and sprays the fire-extinguishing water as a coolant almost uniformly onto the outer sheet surface of the protected area surrounded by the deployed partition sheet 56 as shown in Fig. 3(B).

[0063] In addition, the partition sheet 56 is available in two types: one with a resin coating on the surface of the fabric weave, and the other without. When an uncoated partition sheet 56 is used, the cooling water sprayed from the coolant spray head 62 wets the sheet surface of the deployed partition sheet 56, and the sprayed cooling water is impregnated into the partition sheet 56 having a fabric weave structure and flows down along the sheet surface. This impregnation of the cooling water and flowing down along the sheet surface closes the gaps in the fabric weave of the partition sheet 56, improving the airtightness, and suppressing the diffusion of hydrogen to the outside of the partition sheet 56 in the event of hydrogen leakage from the dispenser 14, for example. In addition, the impregnation of the cooling water and flowing down along the outer sheet surface cools the partition sheet 56, improving its fireproofing, fire resistance, heat resistance, flame insulation and heat insulation properties, and also improving its smoke insulation properties in the event of a fire.

[0064] In addition, cooling water may be sprayed on the inside of the sheet surface (the sheet surface facing the inside of the protected area) or on the outside (the sheet surface facing the inside of the protected area) of the unfolded partition sheet 56, or cooling water may be sprayed on both the inside and outside of the sheet surface.

[0065] (Control system) Figure 4 is an explanatory diagram showing the control system of the disaster prevention equipment of the hydrogen station in Figure 2. As shown in Figure 4, terminals including a fire detector 36, a hydrogen detector 38, and a starting device 42 installed in the protected area are connected to a signal line 100a from a control panel 35 functioning as a control means, and abnormal events in the protected area, including hydrogen leakage from the dispenser 14, are monitored.

[0066] In addition, the signal line 100b from the control panel 35 is connected to the latch release section 60 of the sheet unfolding device 50 installed around (on the periphery of) the roof 18 covering the dispenser 14, and a control signal from the control panel 35 unlatches the holding member 58, allowing the partition sheet 56 to be unfolded.

[0067] An on-off valve 68 is connected to a signal line 100c from the control panel 35, and the on-off valve 68 is opened by an open control signal from the control panel 35, so that fire extinguishing water supplied from the water spray pump equipment 44 via the water supply pipe 63 can be sprayed from the fire extinguishing head (first fire extinguishing head) 52 installed on the ceiling side of the dispenser 14. The fire extinguishing head 52 and the on-off valve 68 constitute the first fire extinguishing means.

[0068] Also, an on-off valve 64 is connected to a signal line 100d from the control panel 35 in response to the individual cooling of the inner and outer surfaces of the partition sheet 56, and the on-off valve 64 is opened by an open control signal from the control panel 35, making it possible to spray fire extinguishing water supplied from the water spray pump equipment 44 via a water supply pipe 63 from coolant spray heads 62 provided separately on the inner and outer sides of the sheet deployment device 50. The cooling water spray heads 62 and the on-off valve 64 constitute the cooling means.

[0069] In addition, the fire extinguishing means (first fire extinguishing means) and the cooling means are concepts that broadly include the water spray pump system 44 and associated piping and other equipment. This also applies to the second fire extinguishing means described later.

[0070] [Control operation of hydrogen station disaster prevention device] Figure 5 is an explanatory diagram showing the operation of the disaster prevention equipment at a hydrogen station, with Figure 5(A) showing an oblique view and Figure 5(B) showing a front view. Furthermore, to make it easier to understand the inside of the unfolded partition sheet, the partition sheet is shown in a see-through state.

[0071] Control of the hydrogen station's disaster prevention equipment by the control panel 35 is divided into, for example, the following hydrogen leak mode, fire outbreak mode, and surrounding area mode. Here, the hydrogen leak mode is a control mode when a hydrogen leak occurs from the dispenser 14, the fire outbreak mode is a control mode when a fire (compartment fire) occurs inside the protected area including the dispenser 14, and the surrounding area mode is a control mode when a nearby fire or nearby accident occurs outside the protected area. Note that a fuel leak (before a fire) at the gasoline or other refueling station 10A may be included in the nearby fire or nearby accident.

[0072] (Hydrogen leak mode) When the control panel 35 receives a hydrogen detection signal due to a hydrogen leak from the hydrogen detector 38 installed inside the housing of the dispenser 14, it sends a control signal to the latch release section 60 of the sheet deployment device 50 installed on the four sides of the roof 18 of the dispenser 14 to control the hydrogen leak mode, releases the latch of the holding member 58, causes the partition sheet 56 to fall and deploy, and forms a partition section surrounding the protected area under the roof 18, including the dispenser installation area 14a.

[0073] Next, the control panel 35 outputs a start signal to the water spray pump equipment 44 to start pump operation, and also sends an open control signal to the on-off valve 68 to open it, supplying fire extinguishing water from the water spray pump equipment 44 to the fire extinguishing head 52, spraying the fire extinguishing water to the protected area including the dispenser installation area 14a where the dispenser 14 leaking hydrogen is installed to cool it, diffusing the hydrogen gas, and suppressing and preventing an explosion due to hydrogen ignition. Also, by spraying the fire extinguishing water to the protected area, the leaked hydrogen is diluted upward and discharged to the outside through the roof 18 with a ventilation structure and diffused, suppressing and preventing a hydrogen explosion.

[0074] If a hydrogen leak occurs while filling a vehicle with hydrogen, the user operates the starting device 42, and the control panel 35 receives a start-up signal from the starting device 42 and issues an abnormality alarm. An attendant who has become aware of the hydrogen leak due to the abnormality alarm then performs a specified start-up confirmation operation on the control panel 35, for example operating the start-up confirmation switch 35a provided on the control panel 35, and the same control operation of the disaster prevention equipment is performed as when a hydrogen detection signal is received.

[0075] In addition, in the event of a hydrogen leak, cooling of the deployed partition sheet 56 is not essential, so cooling water is not sprayed from the coolant spray head 62. However, if an uncoated partition sheet 56 is used, cooling water may be sprayed to impregnate the partition sheet 56 and increase airtightness in order to prevent the leakage of hydrogen to the surrounding area, particularly to prevent ignition due to leakage toward the gasoline or other fuel station 10A side.

[0076] In addition, if the coolant spray head 62 is arranged to spray coolant onto the inner sheet surface of the partition sheet 56, the spraying may be performed in order to encourage the escape of leaked hydrogen outside the protected area in the event of a hydrogen leak, and to dilute the hydrogen concentration within the protected area.

[0077] (Fire outbreak mode) When the control panel 35 receives a fire detection signal from the fire detector 36 regarding a hydrogen fire leaking from the dispenser 14, it sends a control signal to the latch release section 60 of the sheet deployment device 50 provided on each of the four sides of the roof 18, which releases the latch on the holding member 58, causing the partition sheet 56 to drop and deploy, thereby forming a partition section surrounding the area to be protected below the roof 18.

[0078] Next, the control panel 35 outputs a start signal to the water spray pump equipment 44 to start pump operation as fire outbreak mode control, and also sends an open control signal to the on-off valve 68 to open it, supplying fire extinguishing water from the water spray pump equipment 44 to the fire extinguishing head 52, and spraying the fire extinguishing water on the protected compartment where the burning dispenser 14 is installed, thereby extinguishing and suppressing the fire.

[0079] In addition, the control panel 35 sends an open control signal to the on-off valve 64 to open it, and supplies fire extinguishing water from the water spray pump equipment 44 to the coolant spray heads 62 provided on both sides of the partition sheet 56, spraying cooling water onto both the inside and outside of the sheet surface of the unfolded partition sheet 56, thereby improving the fire prevention, fire resistance, heat resistance, flame insulation, heat insulation, flame insulation, and smoke insulation properties of the partition sheet 56.

[0080] (Ambient Mode) In the event of a vehicle accident or gas leak accident (neighborhood accident) on the public road or in the vicinity of the attached hydrogen station 10, or a neighborhood fire such as a fire at the gasoline or other fueling station 10A, a house fire, or a vehicle fire (neighborhood fire), if a station attendant determines that the danger to the hydrogen station 10B due to the neighborhood fire has increased, a specified start-up operation is performed on the control panel 35, for example, by operating the start-up switch 35b provided on the control panel 35, to control the disaster prevention equipment.

[0081] The control operation of the peripheral mode in the event of a nearby fire or the like is to send a control signal to the latch release section 60 of the sheet deployment device 50 provided on each of the four sides of the roof 18 based on the activation operation of the control panel 35, which releases the latch on the holding member 58, causing the partition sheet 56 to drop and deploy, thereby forming a partition section surrounding the area to be protected below the roof 18.

[0082] Next, the control panel 35 outputs a start signal to the water spray pump equipment 44 to start pump operation, and also sends an open control signal to the on-off valve 64 to open it, supplying fire extinguishing water from the water spray pump equipment 44 to the coolant spray heads 62 provided on both sides of the partition sheet 56, spraying cooling water on both the inside and outside of the sheet surface of the deployed partition sheet 56, improving the fire prevention, fire resistance, heat resistance, flame insulation, heat insulation and smoke insulation of the partition sheet 56 against nearby fires, and reliably protecting the protected area from nearby fires. Here, by improving the smoke insulation, it is possible to more effectively prevent stains and damage to the human body due to smoke. It is also possible to effectively prevent response activities from being hindered due to reduced visibility due to smoke.

[0083] Furthermore, if a nearby fire spreads and the risk of fire increases, a specified manual operation of the control panel 35, for example a manual fire extinguishing switch (not shown) provided on the control panel 35, sends an open control signal to the on-off valve 68 to open it, and fire extinguishing water from the water spray pump equipment 44 is supplied to the fire extinguishing head 52, which sprays the fire extinguishing water on the protected compartment to cool it, thereby improving the fire prevention, fire resistance, flame insulation and heat insulation properties of the partition sheet 56 and providing reliable protection from nearby fires.

[0084] In addition, if multiple abnormal events occur simultaneously, such as a hydrogen leak, a compartment fire, or an abnormal event in the surrounding area (a nearby fire or accident), the disaster prevention equipment will be controlled using a combination of control modes that correspond to the abnormal events that have occurred.

[0085] [Second embodiment of disaster prevention equipment for hydrogen stations] Fig. 6 is an explanatory diagram showing a second embodiment of the disaster prevention equipment for a hydrogen station, in which Fig. 6(A) shows a perspective view of the equipment in normal operation, and Fig. 6(B) shows a front view of the equipment in operation with the sheet seen through. Fig. 7 is an explanatory diagram showing the control system of the disaster prevention equipment for the hydrogen station in Fig. 6.

[0086] As shown in FIG. 6(A), in addition to the first embodiment described above, this embodiment is characterized in that an outer fire extinguishing head 70 functioning as a second fire extinguishing head is provided on the sheet deployment device 50 provided on the four sides of the roof 18 covering the dispenser 14.

[0087] 7, the outer fire extinguishing head 70 is connected to the water supply pipe 63 via an on-off valve 72, and the on-off valve 72 is connected to a signal line 100e from the control panel 35. The on-off valve 72 and the outer fire extinguishing head 70 constitute a second fire extinguishing means.

[0088] The control operation of the hydrogen station's disaster prevention equipment by the control panel 35 is in addition to the hydrogen leak mode, fire outbreak mode, and surrounding mode by the control panel 35 shown in Figure 4, with the addition of the option of spraying fire water by the outer fire extinguishing head 70.

[0089] The control operation of the hydrogen leakage mode by the control panel 35 is the same as in the first embodiment, and it is not essential for the outer fire extinguishing head 70 to spray extinguishing water around the outside of the protected area. However, if it is desired to further suppress the diffusion of hydrogen into the surrounding area, extinguishing water may be sprayed from the outer fire extinguishing head 70 as necessary.

[0090] In addition, the control operation of the fire outbreak mode by the control panel 35 not only sprays extinguishing water from the inner fire extinguishing head 52, as in the first embodiment, but also sprays extinguishing water from the outer fire extinguishing head 70 to the outside of the partition sheet 56, as shown in Figure 6 (B), further improving the effect of preventing the fire from spreading.

[0091] In addition, the control operation of the peripheral mode by the control panel 35, like the first embodiment, sprays cooling water on the outside and / or inside of the partition sheet 56 by the coolant spraying head 62, and sprays extinguishing water from the outer fire extinguishing head 70 on the outside of the partition sheet 56 as shown in Fig. 6(B), thereby further enhancing the effect of preventing the spread of fire by blocking fire and heat to the protected section in the event of a nearby fire occurring on a nearby public road, site, etc. Note that extinguishing water may be sprayed from the inner fire extinguishing head 52 if necessary.

[0092] In this embodiment, the control contents are the same for a neighborhood fire and a neighborhood accident, but they may be different as necessary.

[0093] [Seat reinforcement structure] Figure 8 is an explanatory diagram showing a sheet deployment device with a water filling tube attached to the periphery of the sheet in the sheet deployed state, and Figure 9 is an explanatory diagram showing the operation of disaster prevention equipment at a hydrogen station equipped with the sheet deployment device of Figure 8, with Figure 9(A) showing an oblique view during operation and Figure 9(B) showing a front view during operation, and further showing a see-through state of the partition sheet.

[0094] As shown in FIG. 8, tubes 74 are provided along both sides and the lower edge of the partition sheet 56, and when the partition sheet 56 is unfolded, the on-off valve 64 is opened to fill the tubes 74 with fire-fighting water supplied from the water supply pipe 63.

[0095] Here, it is more preferable to open the on-off valve 64 to start filling the tube 74 with water when the partition sheet 56 has almost finished dropping and unfolding, and this prevents the tubes on both sides of the partition sheet from expanding sequentially from the upstream side of the water filling flow path, which would hinder smooth unfolding. Also, the water filling pressure can be kept relatively low.

[0096] As shown in Fig. 9, when the tubes 74 of the partition sheet 56 deployed around the periphery of the protected area by the operation of the sheet deployment device 50 are filled with fire extinguishing water, a frame is formed by the weight and water pressure of the fire extinguishing water filled in the tubes 74 to reinforce the partition sheet 56 and maintain the deployed state of the partition sheet 56, preventing the partition sheet 56 from being rolled up or moved by wind, thereby ensuring that the partition state can be maintained. Note that the tubes 74 do not necessarily have to be provided on three sides of the partition sheet 56. For example, they may be provided on only two vertical sides of the partition sheet 56. Also, if an appropriate water filling route can be set, they may be provided only on the lower end side.

[0097] [Water sprayed upwards for firefighting] Figure 10 is an explanatory diagram showing a sheet deployment device with a release opening on the top of the sheet in the sheet deployed state, and Figure 11 is an explanatory diagram showing a hydrogen station disaster prevention equipment in an operating state, which is equipped with the sheet deployment device of Figure 10 and the embodiment of Figure 5, which is equipped with upward spraying means for spraying a fire extinguishing agent upward as an agent to promote the discharge of leaked hydrogen in the event of a hydrogen leak, Figure 11(A) shows an oblique view when in operation, and Figure 11(B) shows a front view when in operation, and further shows the partition sheet in a see-through state.

[0098] As shown in FIG. 10, the partition sheet 56 provided in the sheet deployment device 50 of this embodiment has a release opening 76 formed in the upper part of the sheet to release hydrogen that leaks into the protected compartment when the partition sheet 56 is deployed to the outside.

[0099] In this embodiment, as shown in FIG. 11, a plurality of spray heads 80 are arranged facing upward on a water supply pipe laid in a trough 78 provided along the road surface (floor surface) around the edge of the protected area as an upward spraying means for spraying extinguishing agent upward in the protected area when hydrogen leakage occurs in the protected area, and the spray heads 80 spray extinguishing water upward in the protected area in this example. A lattice cover is arranged at the opening of the trough 78, and a water discharge opening 78a is formed in the lattice cover arranged on the upper part of the spray heads 80. The installation form of the spray heads 80 is not limited to the above, and for example, they may be buried facing upward on the floor surface of the protected area.

[0100] For this reason, if hydrogen leaks from the dispenser 14 in the protected area, for example, fire extinguishing water is sprayed upward into the protected area from a spray head 80 installed in a trough 78 installed on the lower periphery of the protected area, the leaked hydrogen is carried by the air current generated by the spraying of the fire extinguishing water, the leaked hydrogen is added to the ventilation structure of the roof 18, and efficiently released upward from the release opening 76 formed in the upper part of the deployed partition sheet 56, where the hydrogen is discharged and dispersed into the sky, diluting it and preventing a hydrogen explosion. At this time, a coolant may be sprayed onto the partition sheet at the same time.

[0101] The partition sheet 56 having the discharge opening 76 may be used in the other embodiments described above.

[0102] Also, instead of or in addition to forming a discharge opening 76 in the partition sheet 56, a sheet spreading device 50 may be provided slightly below the roof 18 so that a discharge opening is formed between the roof 18 and the sheet spreading device 50.

[0103] (Dilution of leaked hydrogen using exhaust promotion gas) Here, in addition to or instead of extinguishing water, air, nitrogen, other inert gases, or mixtures of these (hereinafter referred to as "exhaust promoting gases") may be used as the leaked hydrogen exhaust promoter. In this case, unnecessary water damage can be prevented. Examples of inert gases include nitrogen, IG-55 (mixture of 50% nitrogen and 50% argon), and IG-54 (mixture of 52% nitrogen, 40% argon, and 8% carbon dioxide). IG-55 and IG-541 are also used as fire extinguishing agents (fire extinguishing gases).

[0104] In addition, for example, in the case of a hydrogen leak, if the leaking hydrogen concentration satisfies a specified first concentration condition, exhaust promotion gas may be released upward from the spray head 80 to dilute the leaking hydrogen, and if a specified second concentration condition is satisfied, the spraying of extinguishing water from the fire extinguishing head 52 may be switched to or the spraying of extinguishing water from the fire extinguishing head 52 may be added.

[0105] The predetermined first concentration condition is, for example, a concentration range in which it is determined that hydrogen is leaking but the risk of ignition, fire, or explosion is significantly low, and the predetermined second concentration condition is, for example, a concentration range in which it is determined that the risk of ignition, fire, or explosion is higher than the first concentration condition. The determination may be made by adding factors such as the rate of concentration increase and duration to these conditions.

[0106] As a control of the upward spraying means of the control panel 35 according to such a leaked hydrogen concentration, for example, when the hydrogen concentration detected by the hydrogen detector 38 reaches 25% LEL (Lower Explosion Limit), the control panel 35 notifies (warns) that the first concentration condition is satisfied, and also unfolds the partition sheet 56 to partition the protected area and sprays the discharge promotion gas upward from the spray head 80 to discharge and dilute the leaked hydrogen. Then, when the hydrogen concentration further increases and the detected hydrogen concentration reaches 50% LEL, it is determined that the second concentration condition is satisfied, and the upward spray from the spray head 80 is switched to the spraying of fire extinguishing water from the fire extinguishing head 52, or both the spraying of the discharge promotion gas and the spraying of fire extinguishing water may be performed, so that the hydrogen gas is discharged and diluted and the space in the protected area and the protected object (e.g., a dispenser) in the protected area are simultaneously cooled and protected. If the hydrogen concentration further increases and reaches, for example, 60 to 75% LEL, the system related to the hydrogen supply at the hydrogen station is controlled to shut down.

[0107] In this way, when the hydrogen concentration is low, the extinguishing agent is not sprayed, thereby preventing water damage, and when the concentration does not decrease as a result of diluting it with the spraying of the exhaust promotion gas, the extinguishing agent can be sprayed to provide more reliable protection.

[0108] The upward sprinkling means of this embodiment may be combined with other embodiments, for example, with the embodiments of Figs. 6 and 9, and in each case the configuration of the cooling means of Fig. 3 may be adopted.

[0109] [Disaster prevention equipment control] FIG. 12 is an explanatory diagram showing control patterns for abnormal events in disaster prevention equipment of a hydrogen station equipped with the first fire extinguishing means, second fire extinguishing means, and cooling means shown in FIG. 7. Abnormal events that occur are divided into hydrogen leaks, compartment fires, nearby fires, and nearby accidents, and the control of the first fire extinguishing means, second fire extinguishing means, and cooling means for each abnormal event is shown as control patterns 1 to 5 in FIGS. 12(A) to (E), with the case of control being marked "ON."

[0110] 7, the first extinguishing means is composed of the extinguishing head 52 and the on-off valve 68, the second extinguishing means is composed of the outer extinguishing head 70 and the on-off valve 72, and the cooling means is composed of the coolant spraying head 62 and the on-off valve 64. The sheet deployment device 50 operates in response to the occurrence of all abnormal events. Also, fuel leakage (before the fire) at the gasoline or other refueling station 10A is included in the nearby fire or nearby accident.

[0111] (Control pattern 1) Control pattern 1 in FIG. 12(A) is the minimum necessary control pattern targeting the first fire extinguishing means and the cooling means, in which only the first fire extinguishing means is operated in the event of a hydrogen leak or a compartment fire, and on the other hand, in the event of a nearby fire or accident, only the cooling means is operated.

[0112] (Control pattern 2) Control pattern 2 in FIG. 12(B) is a control pattern that targets the first fire extinguishing means, the second fire extinguishing means, and the cooling means, and in the event of a hydrogen leak or a compartment fire, the first fire extinguishing means and the coolant spraying means are operated, while in the event of a nearby fire or accident, the second fire extinguishing means and the cooling means are operated.

[0113] (Control pattern 3) Control pattern 3 in FIG. 12(C) is another control pattern targeting the first fire extinguishing means, the second fire extinguishing means, and the cooling means, in which in the event of a hydrogen leak or a compartment fire, the first fire extinguishing means and the second fire extinguishing means are operated, while in the event of a nearby fire or nearby accident, the first fire extinguishing means and the cooling means are operated.

[0114] (Control pattern 4) Control pattern 4 in Fig. 12(D) is a control pattern in which the first and second fire extinguishing means are operated when a nearby fire or accident occurs. Note that the case where a hydrogen leak or a compartment fire occurs is omitted, but any of control patterns 1 to 3 is used.

[0115] (Control pattern 5) Control pattern 5 in Fig. 12(E) is a control pattern in which the first fire extinguishing means, the second fire extinguishing means and the cooling means are all operated in response to the occurrence of all abnormal events. In addition, the order in which the first fire extinguishing means, the second fire extinguishing means and the cooling means are operated is changed to, for example, (first fire extinguishing means) → (cooling means) → (second fire extinguishing means) in the case of a hydrogen leak or a compartment fire. On the other hand, for a fire or accident in the vicinity, for example, (Cooling means) → (Second extinguishing means) → (First extinguishing means) In either case, first, the partition sheet of the partition means is deployed to form a partition section surrounding the section to be protected.

[0116] The order of operations of the above-mentioned means is merely an example, and other orders may be used, or any two or three operations may be performed simultaneously.

[0117] In addition, the control pattern for an abnormal event in the disaster prevention equipment of a hydrogen station equipped with the first fire extinguishing means and cooling means shown in Figure 4 is the control pattern obtained by excluding the second fire extinguishing means from control patterns 1 to 5 shown in Figures 12(A) to (E).

[0118] [Modifications of the present invention] (Formation of multi-partitioned compartments) The partition sheet may be deployed to form a partition section that divides the area to be protected, including the area where the dispenser is installed, so as to surround the area to be protected in two layers. In this case, the intermediate area between the inner partition section and the outer partition section may be treated as the area to be protected, or may be treated as outside the area to be protected.

[0119] In addition, when forming a partition area that is surrounded by three or more layers, as for the intermediate area between the two or more layers other than the innermost layer, whether to treat part or all of it as a protected area or outside the protected area can be selected depending on the system, operational form, and other circumstances.

[0120] (Fire extinguishing agents for the first and second extinguishing methods) In the above-described embodiment, the extinguishing means (first extinguishing means) and the second extinguishing means are exemplified by spraying extinguishing water as an extinguishing agent. However, as in the embodiment of the upward spraying means, the spraying of extinguishing water may be combined with the spraying of an extinguishing gas (e.g., IG-55, IG-541) as a leaking hydrogen exhaust promoter.

[0121] For example, in the event of a hydrogen leak, if the leaking hydrogen concentration meets a specified third concentration condition, one of the above gases may be released from the fire extinguishing head 52 or the outer fire extinguishing head 70 to dilute the leaking hydrogen, and if a specified fourth concentration condition is met, the spraying of fire extinguishing water may be switched to or added to.

[0122] The predetermined third concentration condition is, for example, a concentration range in which it is determined that hydrogen is leaking but the risk of ignition, fire, or explosion is considerably low, and the predetermined fourth concentration condition is, for example, a concentration range in which it is determined that the risk of ignition, fire, or explosion is higher than that in the third concentration condition. The determination may be made by adding factors such as the rate of concentration increase and duration to these conditions.

[0123] As the control of the extinguishing means by the control panel 35 in response to such a leaked hydrogen concentration, for example, in the case of the extinguishing means (first extinguishing means), when the hydrogen concentration detected by the hydrogen detector 38 reaches 25% LEL, the control panel 35 reports (warns) that the third concentration condition is met, and also deploys the partition sheet 56 to partition the protected area and sprays extinguishing gas from the extinguishing head 52 to discharge and dilute the leaked hydrogen. Then, when the hydrogen concentration further increases and the detected hydrogen concentration reaches 50% LEL, it is determined that the fourth concentration condition is met, and the spraying from the extinguishing head 52 is switched to spraying extinguishing water, or both the spraying of extinguishing gas and the spraying of extinguishing water may be performed, so that the hydrogen gas is discharged and diluted, and the space in the protected area and the object to be protected (e.g., a dispenser) in the protected area are cooled and protected at the same time.

[0124] In this way, when the hydrogen concentration is low, water for extinguishing is not sprayed, thereby preventing water damage, and when the hydrogen concentration does not decrease as a result of dilution by spraying the exhaust promoting gas, the extinguishing agent is sprayed to provide more reliable protection. The same can be done for the second extinguishing means.

[0125] (Concentration conditions) The first and third concentration conditions shown in the above embodiment may be the same or different, and the same applies to the second and fourth concentration conditions.

[0126] Furthermore, the hydrogen concentration values ​​for each concentration condition shown in the above embodiment are merely examples, and the present invention is not limited to these values.

[0127] (Hydrogen detection signal) The hydrogen detection signal from the hydrogen detector 38 may be a signal indicating that a predetermined concentration has been reached, or may indicate the detected hydrogen concentration. In the latter case, the control panel 35 determines whether or not the predetermined concentration has been reached.

[0128] (Hydrogen station) The above embodiment takes as an example a hydrogen station that is provided together with a gasoline or other refueling station, but is not limited to this and can be similarly applied to a stand-alone hydrogen station.

[0129] Furthermore, the above embodiment has been described with reference to an on-site hydrogen station equipped with hydrogen production equipment, but is not limited to this and can be similarly applied to an off-site hydrogen station that does not have hydrogen production equipment.

[0130] (Sheet deployment device) The above embodiment takes as an example a case in which multiple sheet deployment devices are arranged around the periphery of the roof covering the top of the dispenser, but as long as the partition sheet can be deployed to surround the periphery of the area to be protected, including the dispenser installation area, the sheet deployment devices can be arranged as needed.

[0131] Furthermore, if the width of the section to be protected is long, multiple sheet deployment devices are arranged side by side so that the ends of adjacent partition sheets overlap to close the gap.

[0132] (Other combinations of embodiments) The present invention includes appropriate combinations other than the combinations of the above-described embodiments that do not impair the objects and advantages of the present invention.

[0133] (others) The present invention also includes appropriate modifications that do not impair the objects and advantages of the present invention. For example, the extinguishing water can be replaced with extinguishing foam or powder extinguishing agent.

[0134] Furthermore, the present invention is not limited to the numerical values ​​shown in the above embodiment. [Explanation of symbols]

[0135] 10: Hydrogen station with attached facility 10A: Gasoline and other refueling stations 10B: Hydrogen station 10C: Hydrogen production area 11,15:Fire wall 12: Fixed fuel supply equipment 12a: Gas station 13: Fixed lubrication equipment 13a: Oil station 14: Dispenser 14a: Dispenser installation area 16,18:Roof 20: Raw fuel tank 22: Hydrogen production equipment 24: Compressor 25: Storage facilities 26: Office 32: Fire receiving panel 34:Fire detector 35: Control panel 36: Fire detector 38: Hydrogen detector 40: Temperature detector 42: Starting device 44: Water spray pump equipment 46:Emergency power equipment 48: Water spray head 50: Sheet deployment device 52: Fire extinguishing head 55: Device body 56: Partition sheet 57: Seat fixing part 58: Retaining member 60: Latch release section 62: Coolant spray head 63: Water supply pipe 64, 68, 72: Opening and closing valves 70: Outer fire extinguishing head 74: Tube 76: Release aperture 78: Trough 80: Spray head

Claims

1. A dispenser for supplying hydrogen; Disaster prevention equipment for protecting a predetermined protection target area including an installation area of ​​the dispenser; Equipped with The disaster prevention equipment includes: a partitioning means for surrounding and partitioning the protection target area when a predetermined abnormal event occurs; a plurality of spraying means for spraying a predetermined substance to a predetermined area in order to deal with the abnormal event that has occurred, the spraying means including a first extinguishing means for spraying a fire extinguishing agent in the protected compartment separated by the partitioning means; Equipped with A plurality of operation patterns are provided for selectively operating the plurality of scattering means in response to a location where an abnormal event has occurred, A hydrogen station characterized in that, when an abnormal event occurs, a plurality of dispersing means including the first fire extinguishing means operate in an operation pattern corresponding to the location where the abnormal event has occurred.

2. A dispenser for supplying hydrogen; Disaster prevention equipment for protecting a predetermined protection target area including an installation area of ​​the dispenser; Equipped with The disaster prevention equipment includes: a partitioning means for surrounding and partitioning the protection target area when a predetermined abnormal event occurs; a plurality of spraying means for spraying a predetermined substance to a predetermined area in order to deal with the abnormal event that has occurred, the spraying means including a first extinguishing means for spraying a fire extinguishing agent in the protected compartment separated by the partitioning means; Equipped with A plurality of operation patterns are provided for selectively operating the plurality of scattering means in response to the type of abnormal event, A hydrogen station characterized in that, when an abnormal event occurs, a plurality of dispersing means including the first fire extinguishing means operate in an operation pattern corresponding to the abnormal event that has occurred.

3. 3. The hydrogen station according to claim 1 or 2, A hydrogen station characterized in that the multiple spraying means of the disaster prevention equipment include, in addition to the first fire extinguishing means, at least one of a cooling means for spraying a coolant onto the partition means that separates the protected compartment, a second fire extinguishing means for spraying a fire extinguishing agent onto the outside of the protected compartment separated by the partition means, and an upward spraying means for spraying a predetermined leaking hydrogen discharge promoting agent from the bottom to the top of the space within the protected compartment.

4. A dispenser for supplying hydrogen; Disaster prevention equipment for protecting a predetermined protection target area including an installation area of ​​the dispenser; Equipped with The disaster prevention equipment includes: a partitioning means for surrounding and partitioning the protection target area when a predetermined abnormal event occurs; a first extinguishing means for spraying a fire extinguishing agent into the protection target compartment separated by the partition means; Equipped with The hydrogen station is characterized in that the partition means normally holds the partition sheet in a non-deployed state, and when the specified abnormal event occurs, releases the partition sheet and deploys it downward.

5. A dispenser for supplying hydrogen; Disaster prevention equipment for protecting a predetermined protection target area including an installation area of ​​the dispenser; Equipped with The disaster prevention equipment includes: a partitioning means for surrounding and partitioning the protection target area when a predetermined abnormal event occurs; a first extinguishing means for spraying either or both of a predetermined leaked hydrogen discharge promoting gas and a fire extinguishing agent into the protection target compartment separated by the partition means; Equipped with The first fire extinguishing means is When a hydrogen leak occurs in the protected area as the specified abnormal event and the leaked hydrogen concentration satisfies a specified third concentration condition, the leaked hydrogen discharge promoting gas is sprayed; A hydrogen station characterized in that the extinguishing agent, or both the extinguishing agent and the leaking hydrogen exhaust promoting gas, are sprayed when the leaking hydrogen concentration satisfies a predetermined fourth concentration condition which is stricter to be met than the third concentration condition.

6. A dispenser for supplying hydrogen; Disaster prevention equipment for protecting a predetermined protection target area including an installation area of ​​the dispenser; A disaster prevention method for a hydrogen station comprising: When a specified abnormal event occurs, The partitioning means of the disaster prevention equipment surrounds and partitions the area to be protected, A disaster prevention method for a hydrogen station, characterized by operating a plurality of spraying means including a first extinguishing means that sprays a fire extinguishing agent within the protected compartment separated by the partition means of the disaster prevention equipment, in an operation pattern that corresponds to the location of the abnormal event from a plurality of operation patterns corresponding to the location of the abnormal event that has occurred, and spraying a specified substance into a specified area to deal with the abnormal event that has occurred.

7. A dispenser for supplying hydrogen; Disaster prevention equipment for protecting a predetermined protection target area including an installation area of ​​the dispenser; A disaster prevention method for a hydrogen station comprising: When a specified abnormal event occurs, The partitioning means of the disaster prevention equipment surrounds and partitions the area to be protected, A disaster prevention method for a hydrogen station, characterized by operating a plurality of spraying means including a first extinguishing means that sprays a fire extinguishing agent within the protected compartment separated by the partition means of the disaster prevention equipment in an operation pattern that corresponds to the type of abnormal event that has occurred from a plurality of operation patterns corresponding to the type of abnormal event, and spraying a specified substance into a specified area to deal with the abnormal event that has occurred.

8. A disaster prevention method for a hydrogen station according to claim 6 or 7, A disaster prevention method for a hydrogen station, characterized in that the multiple spraying means of the disaster prevention equipment include, in addition to the first fire extinguishing means, at least one of a cooling means for spraying a coolant onto the partitioning means that separates the protected compartment, a second fire extinguishing means for spraying a fire extinguishing agent onto the outside of the protected compartment separated by the partitioning means, and an upward spraying means for spraying a predetermined leaking hydrogen discharge promoting agent from the bottom to the top of the space within the protected compartment.

9. A dispenser for supplying hydrogen; Disaster prevention equipment for protecting a predetermined protection target area including an installation area of ​​the dispenser; A disaster prevention method for a hydrogen station comprising: When a specified abnormal event occurs, The partition sheet that is held in the non-deployed state of the disaster prevention equipment is released and deployed downward, and the partition sheet surrounds and partitions the protection target area, A disaster prevention method for a hydrogen station, comprising the steps of: dispersing a fire extinguishing agent within the protected compartment separated by the partition sheet using a first fire extinguishing means of the disaster prevention equipment.

10. A dispenser for supplying hydrogen; Disaster prevention equipment for protecting a predetermined protection target area including an installation area of ​​the dispenser; A disaster prevention method for a hydrogen station comprising: When a hydrogen leak occurs in the protected area as a predetermined abnormal event, the protected area is surrounded and partitioned by a partitioning means of the disaster prevention equipment, When the leaked hydrogen concentration in the protected area satisfies a predetermined third concentration condition, a leaked hydrogen exhaust promoting gas is sprayed into the protected area by a first fire extinguishing means of the disaster prevention equipment; A disaster prevention method for a hydrogen station, characterized in that when the leaked hydrogen concentration within the protected area satisfies a predetermined fourth concentration condition which is stricter to be met than the third concentration condition, the first extinguishing means sprays a fire extinguishing agent, or both the fire extinguishing agent and the leaked hydrogen exhaust promoting gas, within the protected area.

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