JP6548242B1 - Fuel storage tank - Google Patents

Abstract

An object of the present invention is to prevent a situation in which fuel ejected from any part of a tank body is damaged and damaged, and to reduce the installation area as much as possible. In addition, the fuel temperature rises due to direct sunlight. A fuel storage tank capable of suppressing the above problem is provided. A fuel storage tank according to the present invention includes a tank main body 2 for storing fuel, and a bottom plate 3 and a vertical plate 4 for storing fuel flowing out from a damaged portion when the tank main body 2 is damaged. The oil breakwater 5, the support legs 6 that support the tank body 2 by floating from the bottom plate 3 of the oil breakwater 5, and the upper, front, rear, right, and left sides of the tank body 2 are covered with a gap. A cover 7 and an opening / closing door 8 which is provided on a side of the cover 7 and is normally closed and opened when fuel is taken out from the tank body 2, and the cover 7 is connected to the oil barrier 5. In addition, a double shell tank structure in which the tank body 2 is enclosed by an outer shell 9 made of the oil breakwater 5 is formed. [Selection] Figure 2

Description

  The present invention relates to a fuel storage tank in which fuel flowing out of a tank body is stored by an oil barrier when the tank body is damaged or damaged.

  In financial institution stores, hospitals, medical centers, nursing homes, and public facilities such as hospices, emergency generators are provided to generate electric power in the event of a power failure in the event of a disaster such as an earthquake, tsunami, heavy rain, or flood. The fuel tank provided in this type of generator is usually about 70 to 80 liters, and for example, assuming that the fuel consumption of the generator (fuel consumption rate) is 20 [liter / hour], only 3 to 4 hours I can not operate the generator. For this reason, when the blackout due to a disaster lasts for a long time beyond the time that can be coped with the fuel tank of the generator, or because the turnout blackout occurs, the time interval of the power supply can be coped with the fuel tank capacity of the generator When the time exceeds the time, a fuel auxiliary tank (fuel storage tank) is required to continue the in-house power generation and appropriately operate the facility.

  FIG. 1 shows a conventional fuel storage tank a (see Patent Documents 1 and 2). As shown, the fuel storage tank a is a tank body b for storing fuel, an oil barrier c arranged below the tank body b, and a support for floating the tank body b from the oil barrier c And a leg d. The tank body b has a capacity of about 500 to 1000 liters and can cope with power generation for several days. The oil barrier c is composed of a rectangular bottom plate c1 disposed below the tank body b and a vertical plate c2 extending upward from the peripheral edge of the bottom plate c1. In the case of breakage or damage, the fuel flowing out of the tank body b is stored. The support leg d has a function of earning the capacity of the oil barrier c more than the capacity of the tank body b by floating the tank body b from the bottom plate c1 of the oil barrier c. In the lower part of the tank body b, a fuel extraction pipe e is provided, and in the upper part of the tank main body a refueling port f, a ventilation pipe g, and a liquid level gauge h are provided.

  In such a fuel storage tank a, since the tank body b is floated above the upper edge of the vertical plate c2 of the oil crest by the support leg d, the volume of the oil crest is determined by the volume of the tank body b. Even if all the fuel leaks from the full tank body b, all the leaked fuel is properly stored in the oil barrier c.

Utility model registration No. 3000267 Utility model registration No. 3000264

  By the way, when the lower part of the tank body b is damaged or damaged and the fuel leaks from there, the fuel is spouted downward from the lower part of the tank body b which is the damaged damaged part, so the ejected fuel is discharged to the tank body b It is possible to properly store the oil in the oil crest by receiving the oil c in the lower position.

  However, when the side portion of the tank body b is broken or damaged, the fuel jetted laterally from the side portion of the tank body b which is the broken damage portion is ejected to the outside of the oil crest c. In this case, there is no point in providing the oil barrier c, and environmental pollution becomes a problem.

  It is also conceivable to expand the area of the bottom plate c1 of the oil crest c to receive the fuel ejected from the damaged portion on the side of the tank body b, but the installation area becomes excessively large, which is practical I can not say.

  Also, since the tank body b for storing fuel is exposed, if the tank body b is exposed to direct sunlight under the sun in summer, etc., the fuel temperature in the tank body b will be excessively increased. The amount of fuel vapor generated in the tank body b is undesirably increased.

  SUMMARY OF THE INVENTION The object of the present invention, which was created in consideration of the above circumstances, is to prevent the fuel spouted from outside from being scattered outside if any part of the tank body is damaged and damaged, and the installation area as much as possible It is an object of the present invention to provide a fuel storage tank which can be small and additionally can suppress an increase in fuel temperature due to direct sunlight.

According to the present invention invented to achieve the above object, there is provided a tank body for storing fuel and a tank body disposed under the tank body for storing the fuel flowing out from the damaged portion when the tank body is damaged. An oil barrier consisting of a bottom plate and a vertical plate extending upward from the periphery of the bottom plate, and an upper portion of the tank body from the bottom plate of the oil barrier in order to make the storage amount of the oil barrier at least equal to the capacity of the tank body. Provided on the side of the cover, with a support leg for floating and supporting the tank body, a top, a front, a rear, a right side and a left side of the tank main body supported by being supported from the bottom plate by the support leg. , With an open / close door that is normally closed and opened when taking out fuel from the tank body, the lower edge of the cover is connected to the upper edge of the oil barrier, and the tank body has an outer shell consisting of the cover and the oil barrier The gap A fuel storage tank that has become encapsulated by double hull tank structure Te, the bottom plate of the oil retaining Tsutsumi, placed inside the outer shell to open the door for storing the fuel taken from the tank body There is provided a mounting space for mounting the portable fuel tank, and the vertical wall of the oil barrier below the opening and closing door is inclined so as to fall from the mounting space to the outside of the shell, and the operator When standing in front of the opening and closing door, the toes of the operator's feet can be inserted below the inclined vertical plate, and the bottom of the portable fuel tank lifted by the operator is on the inner surface of the inclined vertical plate A fuel storage tank is provided, characterized in that it is slidable .
Be served.

  In the fuel storage tank according to the present invention, a vent pipe for discharging the fuel vapor in the tank body is provided at the top of the tank body, and the vent pipe is penetrated from the inside of the cover to the outside, The fuel vapor in the main body may be discharged to the outside of the cover instead of between the tank body and the cover.

  In the fuel storage tank according to the present invention, the upper portion of the tank body is provided with a filler port for supplying fuel in the tank body, and the upper portion of the cover can be opened and closed in accordance with the position of the filler port of the tank body. The hatch may be opened to supply fuel to the tank body from the outside of the cover.

  In the fuel storage tank according to the present invention, a bolt and nut for connecting and disconnecting the cover and the oil barrier in a detachable manner is provided inside the outer shell consisting of the cover and the oil barrier and provided on the side of the cover The opening at the time of opening the opening and closing door serves as a work opening for accessing the bolt and nut from the outside of the outer shell, and the opening and closing door may be provided with a key.

  In the fuel storage tank according to the present invention, a bolt and nut for connecting and disconnecting the cover and the oil barrier in a detachable manner is provided inside the outer shell consisting of the cover and the oil barrier, and the outer shell is provided on the side of the cover. A louver for ventilating the inside and outside of the housing may be removably attached with a screw, and the opening when the louver is removed may be a working opening for accessing the bolt nut from the outside of the outer shell.

According to the fuel storage tank of the present invention, the following effects can be exhibited.
(1) The upper, front, rear, right, and left sides of the tank body are covered with a cover, and the lower side of the tank body is covered with an oil barrier formed in a deep dish shape from the bottom plate and the vertical plate, If any part of the tank body is broken, the fuel spouted therefrom can be confined inside the outer shell consisting of the cover and the oil barrier, and the fuel can be prevented from splashing around.
(2) The oil barrier and the cover are connected, and a double shell tank structure in which the tank body is enclosed is formed by the oil barrier and the outer shell, so the gap between the tank body and the cover Even if the clearance) is made small, scattering of fuel ejected from the tank body can be reliably prevented, and the whole can be made compact by reducing the gap between the tank body and the cover. Therefore, it can be installed in a narrow space such as the roof of a building.
(3) Since the gap between the outer shell and the tank main body accommodated therein functions as an air insulation layer, storage is carried out in the tank main body even in a situation where the outer shell is exposed to direct sunlight under the sun in summer etc. The temperature rise of the fuel can be suppressed, and the amount of fuel vapor generation can be reduced.
(4) When the operator opens the door and puts the carrying fuel tank in and out of the shell, the toe of the foot of the worker standing in front of the door is inserted below the inclined vertical plate As a result, the distance between the bottom of the operator's foot and the portable fuel tank placed in the mounting space becomes short, and the portable fuel tank with heavy weight can be efficiently lifted, and the operator can lift it. By sliding the bottom of the portable fuel tank on the inner surface of the inclined vertical plate, part of the weight of the portable tank can be supported by the inclined vertical plate, and the work load on the operator can be reduced. .

It is a perspective view of the fuel storage tank which shows a prior art example. FIG. 1 is a perspective view of a fuel storage tank showing an embodiment of the present invention. It is an explanatory view showing an outer shell which consists of an oil barrier and a cover of a fuel storage tank concerning one embodiment of the present invention, (a) is a side view, (b) is a front view, (c) is a rear view, d) is a plan view. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the tank main body of the fuel storage tank which concerns on one Embodiment of this invention, (a) is a side view, (b) is a front view, (c) is a rear view, (d) is a top view. .

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values and the like shown in the embodiment are merely examples for facilitating the understanding of the invention, and the invention is not limited unless otherwise specified. In the present specification and drawings, elements having substantially the same functions and configurations are denoted by the same reference numerals to omit repeated description, and elements not directly related to the present invention are not illustrated. Do.

(Outline of fuel storage tank 1)
The outline | summary of the fuel storage tank 1 which concerns on FIG. 2 at one Embodiment of this invention is shown. The fuel storage tank 1 is a fuel auxiliary tank for an emergency generator provided in public facilities such as financial institution stores, hospitals, medical centers, nursing homes, hospices and the like. Generally, in these public facilities etc., in case of power failure in the event of earthquake, tsunami, heavy rain, flood etc., an emergency generator is provided to secure the power necessary to operate the facilities properly. There is.

  However, the capacity of the fuel tank of a general emergency generator generally used is not sufficient at about 70 to 80 liters, for example, when the fuel consumption of the generator is 20 liters / hour. The power generation time is limited to several hours (3 to 4 hours). For this reason, when the blackout due to a disaster lasts for a long time beyond the time that can be coped with the fuel tank of the generator, or because the turnout blackout occurs, the time interval of the power supply can be coped with the fuel tank capacity of the generator When the time exceeds the time, an emergency fuel auxiliary tank is required to continue the operation of the emergency generator and appropriately operate the facility. Therefore, the inventor has developed a fuel auxiliary tank 1 described below.

  As shown in FIG. 2, a fuel auxiliary tank (fuel storage tank) 1 according to an embodiment of the present invention includes a tank body 2 for storing fuel and fuel that flows out from the damaged portion when the tank body 2 is damaged. Oil reservoir 5 composed of bottom plate 3 disposed below tank main body 2 and vertical plate 4 extending upward from the periphery of bottom plate 3, and at least the amount of oil reservoir 5 stored. In order to increase the capacity of the tank body 2 or more, a support leg 6 is provided, which floats the tank body 2 above the bottom plate 3 of the oil barrier 5 and supports the tank body 2.

  Further, the fuel auxiliary tank 1 includes a cover 7 which covers the upper, front, rear, right and left sides of the tank main body 2 supported by being floated from the bottom plate 3 by the support legs 6 with a gap, and the cover 7 The cover 7 is provided with an open / close door 8 provided on the side, normally closed and opened when fuel is taken out of the tank body 2, the lower edge of the cover 7 being connected to the upper edge of the oil barrier 5, The outer shell 9 consisting of 7 and the oil barrier 5 forms a double shell tank structure in which the tank body 2 is enclosed with a gap. Hereinafter, each component (element) which comprises the fuel auxiliary tank 1 is explained in full detail.

(Tank body 2)
As shown in FIG. 2 and FIG. 4, the tank body 2 is formed in a rectangular parallelepiped shape, and the capacity is set to about 500 to 1000 liters (about 10 times the normal fuel tank provided in the generator itself) It is done. If the capacity of the tank body 2 is about 500 to 1000 liters, power generation for several days can be handled if the fuel consumption of the emergency generator is 20 liters / hour. Although a metal such as stainless steel or steel is generally used as the material of the tank body 2, the weight may be reduced by using a resin or the like. Further, the shape of the tank body 2 is not limited to a rectangular parallelepiped, and may be a cube, a sphere, a cylinder, or the like.

  As shown in FIG. 4, the fuel extraction pipe 10 is provided at the lower part of one side surface of the tank main body 2 in the longitudinal direction (surface on the side where the opening / closing door 8 is provided on the cover 7). Is provided with an open / close valve (open / close cock). In the present embodiment, two fuel take-off pipes 10 are provided at intervals in the width direction of the tank body 2, but may be one or three or more. As shown in FIG. 4 (a), the bottom plate of the tank body 2 is inclined such that the side on which the fuel extraction pipe 10 is provided is lower than the opposite side. The reason is that all the fuel in the tank body 2 is properly discharged from the fuel extraction pipe 10.

  As shown in FIGS. 4A and 4B, a water drain pipe 11 is provided at the lowermost portion of the bottom plate of the tank body 2, and an open / close cock is provided at the water drain pipe 11. The water drain pipe 11 drains the water inside the tank body 2. That is, when water is mixed with fuel when fuel is supplied to the tank main body 2 when it rains, or when water condenses on the inner surface of the tank main body 2, the water has a larger specific gravity than fuel and is stored in the bottom of the tank main body 2. Where it is done, the water is drained from the drainage pipe 11.

(Oil dike 5)
As shown in FIGS. 2 and 3, an oil barrier 5 is provided below the tank body 2 in order to store fuel that flows out from the damaged portion when the tank body 2 is damaged. The oil barrier 5 comprises a rectangular bottom plate 3 disposed below the tank body 2 and a vertical plate 4 extending upward from the periphery of the bottom plate 3. Since the weight of fuel in the tank body 2 and the inside thereof is added to the oil barrier 5, the base plate 3 and the vertical plate 4 are made of metal such as stainless steel or steel in order to appropriately support the weight. ing. Further, the area of the bottom plate 3 and the height of the vertical plate 4 are set so that the storage amount of the oil barrier 5 is equal to or more than the capacity of the tank body 2. The vertical plate 4 is formed vertically except for the vertical plate 4 a on the front side of the cover 8 provided with the open / close door 8 in order to obtain the storage amount of the oil barrier 5.

  As shown to FIG. 2, FIG. 3 (a), the vertical plate 4a of the front side of the cover 7 in which the opening / closing door 8 was provided is not vertical but inclined so that it may fall outside. According to this configuration, when standing in front of the open / close door 8, the worker can approach the cover 7 as much as possible by inserting the toe of the foot below the inclined vertical plate 4a. As a result, when the worker puts the portable fuel tank 12 into the cover 7 from the opening 19 of the open / close door 8 or takes it out the other way, the working efficiency is improved.

  More specifically, as shown in FIG. 3 (a), the portable fuel tank 12 supplied with a full tank inside the cover 7 (outer shell 9) is covered with the cover 7 from the opening 19 of the open / close door 8 opened. When taking it out of (the outer shell 9), the distance between the sole of the operator's foot and the portable fuel tank 12 is vertical by the operator inserting the toe of the foot below the inclined vertical plate 4a. It becomes small compared with the case where there is no inclination in board 4a. For this reason, the operator can lift the heavy portable fuel tank 12 efficiently. Further, by sliding the bottom of the lifted portable fuel tank 12 on the inner surface of the inclined vertical plate 4a, part of the weight of the portable fuel tank 12 can be supported by the inclined vertical plate 4a. The work load on workers is reduced.

  As shown in FIGS. 3 (a) and 3 (b), an oil removal pipe 13 is provided at the lower part of the vertical plate 4a on the front side of the cover 7 provided with the open / close door 8. The opening and closing cock is provided. The oil removal pipe 13 properly discharges the fuel stored in the oil barrier 5 to the outside if the tank body 2 is damaged and the fuel leaks from the tank body 2 and is stored in the oil barrier 5. Provided to In addition, in FIG. 2, the oil removal pipe 13 is abbreviate | omitted on account of drawing.

(Support legs 6)
As shown in FIGS. 2 and 4, a support leg 6 is provided on the lower surface of the bottom plate of the tank body 2. The support leg 6 is provided to raise the storage amount of the oil barrier 5 to at least the capacity of the tank body 2 by supporting the tank body 2 by floating it from the bottom plate 3 of the oil barrier 5. In the present embodiment, the storage amount of the oil barrier 5 is set to 110% of the capacity of the tank body 2. However, any percentage may be used as long as it is 100% or more.

  As shown in FIG. 4, the support legs 6 extend downward from the four corners of the frame member 14 and frame members 14 assembled in a frame shape from L-shaped members disposed respectively along the four sides of the bottom plate of the tank body 2. It has a leg member 15 provided, a base member 16 for increasing the area for transmitting the weight applied to the lower end of the leg member 15 to the bottom plate 3 of the oil barrier 5, and a reinforcing member 17 for connecting the leg members 15. ing. In addition, in FIG. 2, the frame member 14 and the reinforcement member 17 are abbreviate | omitted on account of drawing.

  Although a U-shaped material is used as the base member 16 in the present embodiment, a solid block material may be used to improve load resistance. Although L-shaped material is used for the leg member 15 and the reinforcement member 17 in this embodiment, H-shaped material, square pipe material, etc. may be used. Moreover, as shown to Fig.4 (a), the bracket 18 for pressing the side gap of the tank main body 2 is welded to the frame member 14. As shown in FIG.

  Each member (frame member 14, leg member 15, base member 16, reinforcement member 17) which constitutes supporting leg 6 consists of metals, such as stainless steel and steel, and is united by welding. The support leg 6 thus integrated is fixed to the bottom plate 3 of the oil barrier 5 by welding the base member 16 to the bottom plate 3 of the oil barrier 5. Then, the tank body 2 is placed and welded on the frame member 14 of the support leg 3.

(Cover 7)
As shown in FIGS. 2 and 3, the tank body 2 supported by being supported from the bottom plate 3 of the oil barrier 5 by the support legs 6 is covered by a cover 7. The cover 7 is formed of a substantially rectangular box-shaped box whose bottom is opened, and is formed to cover the upper, front, rear, right and left sides of the rectangular tank body 2 with a gap (clearance) therebetween. ing. The gap between the cover 7 and the tank main body 2 is set to, for example, about 10 to 15 cm (about the extent to which an operator can insert an arm when loosening the bolt nuts 24 a and 24 b as described later).

  Although a metal such as stainless steel is used as the material of the cover 7 in the present embodiment, a resin or the like may be used to reduce the weight. That is, since the weight of the tank body 2 and the fuel in the tank 7 does not substantially add to the cover 7, a material (resin, aluminum alloy, etc.) that is lighter and smaller than the oil barrier 5 to which the weight is added is used. It is possible to

(Opening door 8)
As shown in FIG. 2 and FIG. 3, an open / close door 8 which is normally closed and opened when fuel is taken out of the tank body 2 is provided on the side of the cover 7. The open / close door 8 is provided on the front side of the cover 7 which is the side of the oil barrier 5 on which the inclined vertical plate 4 a is provided. The opening and closing door 8 is attached to an opening 19 formed on the front side of the cover 7 by a hinge 20 so as to be openable and closable, and is provided with an opening and closing handle 21 for opening and closing operation and a key 22 for restricting opening and closing. ing.

(Shell 9)
As shown in FIG. 2 and FIG. 3, the lower edge of the cover 7 is fluidly connected to the upper edge of the oil barrier 5 without any gap, and the cover 7 and the oil barrier 5 make the tank body 2 An outer shell 9 is formed which is separated and enclosed. That is, the fuel auxiliary tank 1 has a double shell tank structure in which the tank body 2 is enclosed with a gap by the outer shell 9 including the cover 7 and the oil barrier 5. Further, the cover 7 is detachable with respect to the oil barrier 5, and the tank body 2 is exposed by removing the cover 7 from the oil barrier 5.

  Specifically, as shown in FIG. 3 and FIG. 4, a flange 23 for connecting the cover 7 and the oil barrier 5 is provided inside the outer shell 9 consisting of the cover 7 and the oil barrier 5 and a connection portion. Are formed on each of the cover 7 and the oil barrier 5 along the circumferential direction of the opening, and the flange 23 has bolt nuts 24a and 24b for connecting and disconnecting the cover 7 and the oil barrier 5 in a detachable manner. Are provided at intervals in the longitudinal direction of the flange 23. When the operator loosens or tightens the bolt nut 24 a from the outside of the cover 7 (outer shell 9), the open / close door 8 provided on the front side of the cover 7 is opened. By inserting the arm, the bolt nut 24a inside the cover 7 (the bolt nut 24a near the open / close door 8) is loosened or tightened. That is, the opening 19 when the open / close door 8 provided on the front side of the cover 7 is opened is a bolt on the side closer to the open / close door 8 from the outside of the cover 7 (outer shell 9) It becomes a working port for accessing (reaching) the nut 24a).

(Louvre 25)
On the other hand, as shown in FIG. 3C, a louver 25 for ventilating the inside and the outside of the cover 7 (the outer shell 9) is screwed to the side of the back side (the side opposite to the front side) of the cover 7. It is detachably attached by 26. Specifically, two openings 27 for attaching the louver 25 are formed at intervals in the width direction on the back side of the cover 7, and the louver 25 is attached to and removed from these openings 27 by screws 26. It is attached freely. Then, when the operator loosens or tightens the bolt nut 24b from the outside of the cover 7 (outer shell 9), the louver 25 provided on the rear side of the cover 7 is removed, and the arm 27 is opened. Is inserted, the bolt nut 24b inside the cover 7 (bolt nut 24b near the louver 25) is loosened or tightened. That is, the opening 27 when the louver 25 is removed has a working port for accessing (reaching) the bolt nut 24 b (bolt nut 24 b closer to the louver 25) from the outside of the cover 7 (outer shell 9) Become.

(Vent tube 28)
As shown in FIGS. 2 and 3, at the upper part of the tank body 2, a vent pipe 28 is provided for discharging the vapor (fuel vapor) of the fuel in the tank body 2 to lower the internal pressure. The vent pipe 28 is extended upward from the tank body 2 through the cover 7, and the fuel vapor in the tank body 2 evaporated by the rise of the air temperature in summer and the like, the tank body 2 and the cover 7 Discharge between the cover 7 and not between. As a result, an increase in internal pressure in the tank body 2 can be avoided, and fuel vapor can not fill the space between the tank body 2 and the cover 7, that is, the inside of the outer shell 9.

(Fuel inlet 29, hatch 30)
As shown in FIGS. 2 and 3, the upper portion of the tank body 2 is provided with a filler port 29 for supplying fuel into the tank body 2, and the upper portion of the cover 7 is configured to A hatch 30 is provided so as to be openable and closable according to the position of the opening 29. According to this configuration, by opening the hatch 30, which is normally closed, fuel can be supplied from the outside of the cover 7 to the tank body 2 inside. That is, even if the tank body 2 has a double shell tank structure covered with the outer shell 9 consisting of the cover 7 and the oil barrier 5, the fuel can be supplied from the top of the tank body 2 by opening the hatch 30 of the cover 7. The gravity can be used to appropriately refuel the tank body 2. The hatch 30 is provided with a key for restricting the opening and closing, and a liquid level gauge 31 for displaying the liquid level of the fuel stored inside is provided at the upper part of the tank body 2.

(Action / effect)
As shown in FIG. 2, according to the fuel auxiliary tank 1 according to the present embodiment, the cover 7 covers the upper side, the front side, the rear side, the right side, and the left side of the tank body 2, and the bottom of the tank body 2 is the bottom plate 3. Because it is covered with an oil barrier 5 formed in a deep dish shape from the vertical plate 4, the fuel jetted from it regardless of which part of the tank main body 2 is broken is composed of the cover 7 and the oil barrier 5 It can be confined inside the shell 9 and the fuel can be prevented from splashing around.

  Further, in the fuel auxiliary tank 1 according to the present embodiment, the upper edge of the oil barrier 5 and the lower edge of the cover 7 are fluidly connected without a gap, and the outer shell 9 is composed of the oil barrier 5 and the cover 7. Since it has a double shell tank structure that encloses the tank body 2 with a gap (clearance) by this, it jets from the tank body 2 even if the gap between the tank body 2 and the cover 7 (outer shell 9) is reduced. Scattering of fuel can be reliably prevented, and by reducing the gap between the tank body 2 and the cover 7 (outer shell 9), the outer shape of the fuel auxiliary tank 1 can be made compact. Therefore, it can be installed in a narrow space such as the roof of a building.

  Further, in the fuel auxiliary tank 1 according to the present embodiment, the gap between the outer shell 9 and the tank main body 2 accommodated therein functions as an air insulation layer, so that the outer shell 9 is in direct sunlight under the sun in summer. The temperature rise of the fuel stored in the tank body 2 can be suppressed even under the condition of being exposed to Therefore, the amount of the vapor of the fuel evaporated in the tank body 2 can be suppressed, and the safety is high. The same louver 25 provided in the lower part of the back side of the cover 7 shown in FIG. 3C is also provided in the upper part of the front side of the cover 7 shown in FIG. The natural convection of the air inside may promote the ventilation of the air in the cover 7 which acts as an insulation.

  As shown in FIGS. 2 to 4, since the vent pipe 28 of the tank body 2 penetrates the cover 7 and extends out of the cover 7, the oil temperature of the fuel in the tank body 2 rises in summer, etc. At this time, the fuel vapor evaporated in the tank body 2 can be discharged out of the cover 7, not between the tank body 2 and the cover 7. Therefore, the increase in internal pressure in the tank body 2 can be avoided, and the inside of the cover 7, ie, the inside of the outer shell 9 will not be filled with fuel vapor, and the safety is high.

  In addition, the upper portion of the tank body 2 is provided with a filler port 29 for supplying fuel into the tank body 2, and the hatch 30 can be freely opened and closed according to the position of the filler port 29 of the tank body 2 at the upper portion of the cover 7. Since it is provided, even if it is a double shell tank structure by opening the hatch 30, by pouring the fuel from the upper part of the tank main body 2 into the filler port 29, the action of gravity without using a pushing pump etc. The tank body 2 can be properly refueled by In addition, since the hatch 30 is provided with a key, it is possible to prevent theft of extracting the fuel from the fuel inlet 29.

  As shown in FIGS. 3 and 4, bolt nuts 24 a and 24 b connecting the cover 7 and the oil barrier 5 are provided inside the outer shell 9 formed of the cover 7 and the oil barrier 5. Therefore, in principle, the bolt nuts 24a and 24b can not be loosened from the outside of the outer shell 9, and it is possible to prevent the situation in which the cover 7 is removed for the purpose of mischief or fuel theft.

  However, by opening the open / close door 8 shown in FIG. 3B and removing the louver 25 shown in FIG. 3C, the opening 19 when the open / close door 8 is opened and the opening 27 when the louver 25 is removed , And the bolt nuts 24a and 24b from the outside of the shell 9 can be accessed. Therefore, the bolt nuts 24a and 24b can be loosened appropriately as needed, and the cover 7 can be removed. Here, since the key 22 is provided on the open / close door 8 and it is necessary to loosen the screw 26 in order to remove the louver 25, removal of the cover 7 can be restricted, and mischief and fuel theft can be avoided.

  As described above, the tank main body 2 is exposed by loosening the bolt nuts 24a and 24b and removing the cover 7 upward from the oil barrier 5. Therefore, it is possible to periodically check the aging of the tank main body 2 etc. It becomes possible and can satisfy the fire service law request.

  While the preferred embodiments of the present invention have been described with reference to the accompanying drawings, it is a matter of course that the present invention is not limited to the above-described embodiments, and various modifications within the scope described in the claims. It goes without saying that examples or modifications are also within the technical scope of the present invention. For example, the present invention is not limited to a fuel auxiliary tank for an emergency generator, but can be applied to a general fuel storage tank.

  INDUSTRIAL APPLICABILITY The present invention is applicable to a fuel storage tank in which the fuel flowing out of the tank body is stored by an oil barrier when the tank body is damaged or damaged.

1 Fuel auxiliary tank (fuel storage tank)
Reference Signs List 2 tank body 3 bottom plate 4 vertical plate 5 oil barrier 6 support leg 7 cover 8 opening / closing door 9 outer shell 19 opening 22 when opening / closing door 8 key 24 a of opening / closing door 8 bolt nut 24 b bolt nut 25 louver 26 screw 27 Opening 28 when removing louver 25 Vent pipe 29 Refueling port 30 hatch

Claims (5)

A tank body for storing fuel, and a bottom plate disposed below the tank body and extended upward from the periphery of the bottom plate in order to store the fuel flowing out from the damaged portion when the tank body is damaged. An oil barrier constituted by a vertical plate, and a support leg for floating the oil tank upward from the bottom plate of the oil barrier and supporting the tank body so that the storage amount of the oil barrier is at least the capacity of the tank body. A cover covering the upper, front, rear, right and left of the tank body supported by being floated from the bottom plate by the support legs with a gap, and provided on the side of the cover, usually closed And an open / close door which is opened when fuel is taken out of the tank body, the lower edge of the cover being connected to the upper edge of the oil barrier, and the outer shell comprising the cover and the oil barrier. tank Body a fuel storage tank which has a double shell tank structure which is enclosed at a gap,
In the bottom plate of the oil barrier, there is provided a mounting space on which the portable fuel tank placed inside the outer shell is placed by opening the open / close door to store the fuel taken out of the tank body. The vertical wall of the oil barrier below the opening and closing door is inclined so as to fall from the placing space to the outside of the outer shell, and when the operator stands in front of the opening and closing door, A toe of a foot can be inserted below the inclined vertical plate, and a bottom portion of the portable fuel tank lifted by the operator can be slid on the inner surface of the inclined vertical plate. Fuel storage tank.   A vent pipe for discharging the fuel vapor in the tank body is provided at the upper portion of the tank body, and the vent pipe penetrates from the inside to the outside of the cover, and the fuel pipe in the tank body The fuel storage tank according to claim 1, wherein the vapor is discharged to the outside of the cover, not between the tank body and the cover.   At the top of the tank body, there is provided a filling port for supplying fuel into the tank body, and at the top of the cover, a hatch can be freely opened and closed according to the position of the filling port of the tank body. The fuel storage tank according to claim 1 or 2, wherein fuel is supplied to the tank main body from the outside of the cover by opening the fuel tank.   Inside the shell consisting of the cover and the oil barrier, there is provided a bolt and nut for connecting and disconnecting the cover and the oil barrier so as to connect and disconnect the cover, and the open / close door provided on the side of the cover is opened. 4. An opening according to claim 1, wherein the opening is a working port for accessing the bolt and nut from the outside of the outer shell, and the opening and closing door is provided with a key. The fuel storage tank described in paragraph.   Inside the shell consisting of the cover and the oil barrier, there is provided a bolt and nut for connecting and disconnecting the cover and the oil barrier in a detachable manner, and ventilating the inside and the outside of the shell on the side of the cover A louver for attaching is detachably attached by a screw, and an opening when the louver is removed serves as a working opening for accessing the bolt nut from the outside of the outer shell from the outside. The fuel storage tank according to any one of 1 to 4.

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