oil depot

Abstract

To provide an oil tank having an inclined oil fence that has a floor surface of the oil fence inclining downward toward a reservoir side, capable of stably holding the tank.SOLUTION: An oil tank comprises a base formed of a plurality of steel frames, an oil fence having a reservoir placed on the base, a steel frame for a tank stand formed of a plurality of steel frames and fixed on a floor surface of the oil fence, and the tank stand formed of a plurality of steel frames placed on the steel frame for the tank stand. A base inner frame of the base and the oil fence floor surface of the oil fence are inclined downward toward a reservoir side. All the top surfaces of the steel frame for the tank stand are at the same height and are level.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an oil storage tank equipped with a tank that supplies fuel to a power generation device, and in particular to an oil storage tank that is configured to be able to stably hold the tank even when an oil retaining wall with a reservoir installed in the oil storage tank is inclined toward the reservoir. [Background technology]

[0002] In recent years, disasters such as earthquakes and heavy rains have become frequent, and emergency power generating systems are now being installed to deal with power outages. It is also becoming necessary to install power generating systems on remote islands and mountainous areas. The power generating systems used in these facilities run on fuels such as kerosene, diesel, and heavy oil A, so the oil storage facility is equipped with a tank that supplies the fuel. This tank is installed on a stand inside the storage facility so that it can supply fuel to the power generating system without using an oil pump.

[0003] Typically, oil storage tanks storing small amounts of hazardous materials, such as kerosene, diesel, and heavy oil, as defined by the Fire Service Act, are equipped with an oil containment bund. To safely recover fuel spilled into the bund, it is preferable to slope the floor of the bund. Patent Document 1 discloses an emergency power generation system that provides a simple oil containment bund structure and facilitates the disposal of liquids flowing into the bund. The system includes a casing housing an engine and a generator supported by a support frame (13), a fuel tank (22) within the support frame, and an oil containment bund (28) below the engine and surrounding the fuel tank, which is partitioned by a bottom plate (24) that is rectangular in plan view, a first side plate (25), a second side plate (27), and a third side plate (27) surrounding the bottom plate, and a partition plate (23) that separates the interior of the support frame. The top surface of the bottom plate is formed by two inclined surfaces that slope downward from the first side plate and the third side plate, respectively, to form a groove-shaped discharge channel (29). A discharge hole (30) is provided in the lower part of the second side plate, connecting the discharge channel to the outside of the support frame. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2020-200775 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in Patent Document 1, a fuel supply unit is provided to supply fuel from fuel tank 22 to the generator, and fuel tank 22 is simply installed on the upper surface of bottom plate 24 of oil retaining dike 28 installed within support frame 13. On the other hand, the tank storing fuel installed in the oil vault of the present invention is required to be installed on a frame within the oil vault, i.e., in a high location, so that it can be supplied to the power generation device without going through an oil feed pump. In addition, because the fuel tank is heavy, it is required to be stably held within the oil vault.

[0006] Therefore, the objective is to provide an oil tank that can stably hold a tank in an oil tank having an inclined oil barrier where the floor of the oil barrier slopes downward toward the reservoir side. [Means for solving the problem]

[0007] According to the present invention, the above problem is solved as follows. (1) The first invention is an oil storage tank comprising a base formed of a plurality of steel beams, an oil containment bund having a storage tank placed on the base, a steel frame for a tank stand formed of a plurality of steel beams and fixed to the floor of the oil containment bund, and a tank stand formed of a plurality of steel beams placed on the steel frame for the tank stand, wherein the base inner frame of the base and the oil containment bund floor surface of the oil containment bund slope downward toward the storage tank side, and all upper surfaces of the steel frame for the tank stand are at the same height and all upper surfaces are horizontal.

[0008] (2) The second invention is an oil storage tank according to (1) above, characterized in that the square steel frame of the tank frame is superimposed on the square steel frame of the base inner frame.

[0009] (3) A third invention is the oil tank according to (1) or (2), characterized in that the base inner frame of the base is formed in a grid shape.

[0010] (4) A fourth invention is an oil storage tank according to (1) or (2), characterized in that the oil barrier is attached to the base by welding.

[0011] (5) The fifth invention is an oil storage tank according to (1) or (2), characterized in that the oil barrier is attached to the base with bolts.

[0012] (6) The sixth invention is an oil tank according to (1) or (2), characterized in that the steel frame forming the base is a channel steel material formed from general structural rolled steel.

[0013] (7) The seventh invention is an oil tank according to (1) or (2), characterized in that the steel frame forming the steel frame for the tank frame is a channel steel material formed from general structural rolled steel material. [Effects of the Invention]

[0014] According to the present invention, the following effects can be achieved. According to the invention (1) above, by using the same type of steel frame for all the components that hold the tank in the oil storage tank, it is possible to standardize the materials used, simplify the manufacturing process, and reduce costs. Furthermore, even if the floor of the oil containment dike slopes downward toward the storage tank, the tank can be held horizontally by adjusting the height and horizontal direction with the steel frame for the tank stand.

[0015] According to the invention of (2) above, by overlapping the steel frame for the tank stand on top of the steel frame of the base inner frame, the strength of the base inner frame and the strength of the steel frame for the tank stand overlap, increasing rigidity and allowing the tank stand and tank to be placed securely.

[0016] According to the invention (3) above, by forming the inner frame of the base in a crisscross shape, the strength of the crisscross portion can be ensured by welding the eight ends of the crisscross shape to the outer frame of the base, and the steel frame of the crisscross portion can reliably hold the oil barrier floor surface that is placed on top of it.

[0017] According to the invention (4) above, the oil reservoir can be attached to the base by welding, thereby simplifying the manufacturing process of the oil reservoir and reducing manufacturing costs.

[0018] According to the invention (5) above, by attaching the oil barrier to the base with bolts, the labor required for manufacturing can be reduced even if the base specifications are not suitable for welding.

[0019] According to the invention (6) above, the steel frame forming the base is made of channel steel formed from general structural rolled steel, which allows inexpensive materials to be used effectively in terms of strength.

[0020] According to the invention (7) above, by using channel steel formed from general structural rolled steel to form the steel frame for the tank stand, it is possible to effectively use inexpensive materials in terms of strength. [Brief explanation of the drawings]

[0021] [Figure 1] 1 shows an oil tank according to one embodiment of the present invention, with FIG. 1(a) showing a flow sheet and FIG. 1(b) showing a front view. [Figure 2] 2 shows an oil tank according to one embodiment of the present invention, with FIG. 2(a) being a plan view, FIG. 2(b) being a right side view, and FIG. 2(c) being a left side view. [Figure 3] 3 shows a base according to one embodiment of the present invention, with FIG. 3(a) being a plan view, FIG. 3(b) being a front view, and FIG. 3(c) being a right side view. [Figure 4] FIG. 3(b) is a cross-sectional view taken along line AA in FIG. [Figure 5]5 shows an oil barrier according to one embodiment of the present invention, with FIG. 5(a) being a plan view, FIG. 5(b) being a front view, and FIG. 5(c) being a right side view. [Figure 6] FIG. 5(b) is a cross-sectional view taken along line BB in FIG. 5(a). [Figure 7] 7 shows an oil barrier according to another embodiment of the present invention, with FIG. 7(a) being a plan view and FIG. 7(b) being a front view. [Figure 8] FIG. 7(b) is a cross-sectional view taken along line CC in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, the same parts are designated by the same reference numerals. The present invention is not limited to the embodiments described below, and includes appropriate modifications of the following embodiments within the scope obvious to those skilled in the art.

[0023] In the description of this specification, the door 11 side of the oil tank 100 is referred to as the front, and the side opposite the door 11 is referred to as the rear.

[0024] 1(a) is a flow sheet of the oil storage tank 100 of the present invention. The oil storage tank 100 has side walls 10, a roof 20, a base 30, a tank 50, and an oil retaining wall 60. The tank 50 holds a maximum of 950 liters of fuel and is equipped with a float switch 51 for checking the amount of fuel stored, a pressure equalizing vent 12, and a manual pump 52 for refueling. An oil supply pipe 54 and a return pipe 55 are connected to a power generation device (not shown).

[0025] Fig. 1(b) is a front view of an oil vault 100 of the present invention. In addition to what is shown in the flow sheet of Fig. 1(a), the oil vault 100 is provided with a maintenance and inspection door 11 and an intake and exhaust hood 13 on the side wall 10, an inspection hatch 21 on the roof 20 for removing the float switch 51 from the tank 50 during maintenance and inspection of the float switch 51, and a tank stand 40 for holding the tank 50.

[0026] Figure 2(a) shows a plan view of the oil vault 10, Figure 2(b) shows a right side view, and Figure 2(c) shows a left side view. A reservoir 61 is provided behind the oil retaining dike 60 in Figure 2(a). The floor of the oil retaining dike slopes downward toward the reservoir 61, and the tank 50 in Figure 2(b) is provided on a tank stand 40 and occupies a high position within the oil vault 10.

[0027] 3(a) shows a base 30 according to one embodiment of the present invention, in which a rectangular base outer frame 31 surrounds a crisscross-shaped base inner frame 35. The base outer frame 31 is integrated with the base inner frame 35 by welding at the ends of the crisscross-shaped eight locations of the base inner frame 35.

[0028] The base outer frame 31 is composed of two base outer frame horizontal members 31-1 and two base outer frame vertical members 31-2, and all four members are made of channel steel material, 150 mm high and 75 mm wide, manufactured using, for example, 4.5 mm thick general structural rolled steel SS400.

[0029] The base inner frame 35 is composed of a base inner frame first horizontal member 35-1, a base inner frame second horizontal member 35-2, and a base inner frame vertical member 35-3. The base inner frame vertical member 35-3 has a height of h mm at the front end and a height of (ha) mm at the rear end, i.e., the height is a mm lower at the rear end. This a mm is the height at which the oil retaining wall floor 62 slopes downward toward the reservoir 61. a mm is, for example, 30 mm. Furthermore, h is 150 mm, the same height as the base outer frame 31. The two base inner frame vertical members 35-3 have the same shape.

[0030] The height of the base inner frame first horizontal member 35-1 is the same as the height of the base inner frame vertical member 35-3 at the position where it contacts the base inner frame vertical member 35-3. The height of the base inner frame second horizontal member 35-2 is the same as the height of the base inner frame vertical member 35-3 at the position where it contacts the base inner frame vertical member 35-3. Because the height of the base inner frame vertical member 35-3 decreases along the rear side, the height of the base inner frame second horizontal member 35-2 is lower than the height of the base inner frame first horizontal member 35-1.

[0031] Figure 4 shows a cross section taken along line AA in Figure 3(a), in which the base inner frame vertical member 35-3 connects the front outer base frame horizontal member 31-1 and the rear outer base frame horizontal member 31-1, and the base inner frame vertical member 35-3 slopes downward by a mm from a height of h mm on the front side to a height of a mm on the rear side. The base inner frame first horizontal member 35-1 and the base inner frame second horizontal member 35-2 intersect with the base inner frame vertical member 35-3 at the same height as the base inner frame vertical member 35-3.

[0032] The base inner frame 35 is made of, for example, a 75 mm wide channel steel material manufactured from 4.5 mm thick general structural rolled steel SS400. The heights of the base inner frame first horizontal member 35-1, base inner frame second horizontal member 35-2, and base inner frame vertical member 35-3 that make up the base inner frame 35 are adjusted so that the height decreases as they are located further rearward.

[0033] Figure 5 shows an oil retaining wall 60 according to one embodiment of the present invention. As shown in Figure 5(a), the oil retaining wall 60 is box-shaped with an open top and is composed of an oil retaining wall floor 62 and oil retaining wall sides 63. The oil retaining wall sides 63 include an oil retaining wall first horizontal side 63-1, an oil retaining wall second horizontal side 63-2, and an oil retaining wall vertical side 63-3. A reservoir 61 is provided in the right corner on the rear side of the oil retaining wall floor 62. A steel frame 65 for a tank stand is fixed to the oil retaining wall floor 62.

[0034] FIG. 5(b) shows a front view of the oil barrier 60, and in this embodiment, the oil barrier 60 is attached to the base outer frame 31 by welding. The welding can be performed, for example, by intermittent fillet welding at a constant pitch around the entire circumference of the oil barrier floor 62 where the oil barrier floor 62 and the base outer frame 31 meet. The height H of the first horizontal side surface 63-1 of the oil barrier is, for example, 300 mm. The levels of the upper edges of the first horizontal side surface 63-1, the second horizontal side surface 63-2, and the vertical side surface 63-3 of the oil barrier included in the oil barrier side surface 63 are the same, i.e., they are included in the same horizontal plane. However, the levels of the lower edges are different.

[0035] 5(c) is a right side view of the oil retaining wall 60, showing the oil retaining wall vertical side surface 63-3. Because the oil retaining wall floor surface 62 is attached in contact with the upper surface of the base inner frame 35, the oil retaining wall vertical side surface 63-3 has a height of H at the front end, but slopes downward by a height a toward the reservoir 61, and the height of the rear end is H+a. Therefore, the height of the oil retaining wall second horizontal side surface 63-2 is also H+a.

[0036] The tank frame steel frame 65 includes a first horizontal tank frame steel frame 65-1, a second horizontal tank frame steel frame 65-2, and a vertical tank frame steel frame 65-3. Since the tank frame steel frame 65 is on which the tank frame 40 and the tank 50 are placed, the levels of the top edges of the first horizontal tank frame steel frame 65-1, the second horizontal tank frame steel frame 65-2, and the vertical tank frame steel frame 65-3 included in the tank frame steel frame 65 are required to be the same, that is, to be included in the same horizontal plane.

[0037] Here, since the oil retaining dike floor 62 slopes downward toward the reservoir 61, the heights of the first tank restraint horizontal steel frame 65-1, the second tank restraint horizontal steel frame 65-2, and the vertical tank restraint steel frame 65-3 included in the tank restraint steel frame 65 fixed to the oil retaining dike floor 62 need to be adjusted to match the slope of the oil retaining dike floor 62. Figure 6 shows a cross section taken along line BB in Figure 5(a). In the portion showing the tank restraint steel frame 65, the tank restraint vertical steel frame 65-3 connects the front side first tank restraint horizontal steel frame 65-1 and the rear side second tank restraint horizontal steel frame 65-2, and the heights are adjusted so that the levels of their upper edges are the same.

[0038] The oil barrier 60 is made, for example, using 2.3 mm thick hot-rolled mild steel plate SPHC, and the steel frame 65 for the tank frame is made, for example, of 100 mm wide channel steel made from 4.5 mm thick general structural rolled steel SS400.

[0039] Figure 7 shows an oil barrier according to another embodiment of the present invention. The oil barrier 60 shown in Figure 5 is attached to the base outer frame 31 by intermittent fillet welding. On the other hand, the oil barrier 60 shown in Figure 7 has an oil barrier flange 66 provided around the periphery of the oil barrier side surface 63, bolt holes drilled in the oil barrier flange 66, and bolt holes drilled on the base outer frame 31 side at positions corresponding to the bolt holes in the oil barrier flange 66, and the oil barrier 60 is attached to the base 30 using bolts. The oil barrier flange 66 is attached to the oil barrier side surface 63 by intermittent fillet welding.

[0040] Generally, oil barriers are attached to a base by welding, but if the base is hot-dip galvanized, the hot-dip galvanization must be scraped off before welding and repair painting must be done after welding, so to reduce the effort required for manufacturing, they are attached using bolts.

[0041] Figure 8 shows a cross section taken along line CC in Figure 7(a). An oil barrier flange 66 is provided around the oil barrier side surface 63. As the oil barrier flange 66, for example, an L-shaped equal-sided angle bar with a thickness of 5 mm can be used.

[0042] An example of the process for manufacturing the oil tank 100 from the side walls 10, roof 20, base 30, tank frame 40, tank 50, oil barrier 60, and steel frame for tank frame 65 described above is as follows. (1) Make the base 30. (2) Place the manufactured oil barrier 60 on the base 30. (3) The steel frame 65 for the tank stand is fixed to the oil retaining wall floor 62 of the oil retaining wall 60. (4) The manufactured tank stand 40 is placed on the steel frame 65 for the tank stand. (5) The manufactured tank 50 is placed on the tank stand 40. (6) Attach the associated piping and accessories to the tank 50. (7) Assemble the side wall 10 to the base 30. (8) Assemble the roof 20 to the side walls 10. (9) Complete the remaining piping and wiring work, and install the ventilation duct 12, hood 13, lighting fixtures, etc. [Explanation of symbols]

[0043] 10 side wall 11 Doors 12 Ventilation hole 13. Food 20 Roof 21 Inspection hatch 30 base 31 Base outer frame 31-1 Base outer frame horizontal member 31-2 Base outer frame vertical member 35 Base inner frame 35-1 Base inner frame first horizontal member 35-2 Base inner frame second horizontal member 35-3 Base inner frame vertical member 40 Tank stand 50 Tank 51 Float switch 52 Manual pump 54 Oil pipe 55 Return pipe 60 Oil dike 61 Tamemasu 62 Oil dike floor 63 Side of oil embankment 63-1 Oil embankment 1st side 63-2 Oil embankment 2nd side side 63-3 Vertical side of oil barrier 65 Steel frame for tank stand 65-1 Tank stand No. 1 horizontal steel frame 65-2 Second horizontal steel frame for tank stand 65-3 Vertical steel frame for tank stand 66 Oil barrier flange 100 Oil storage

Claims

1. a base consisting of a grid-shaped base inner frame formed by a plurality of steel frames and a rectangular base outer frame; an oil containment dike having a reservoir placed on the base; a tank frame steel frame formed of a plurality of steel frames and fixed on the floor surface of the oil containment dike; a tank frame placed on the tank frame steel frame; An oil tank comprising: a tank placed on the tank frame; The rectangular steel frame of the tank rack is superimposed on the rectangular steel frame of the base inner frame, The base inner frame of the base and the oil retaining wall floor surface of the oil retaining wall are inclined downward toward the reservoir tank side, An oil tank characterized in that all top surfaces of the steel frame for the tank frame are at the same height and all top surfaces are horizontal.

2. 2. An oil storage tank according to claim 1, wherein the oil barrier is attached to the base by welding.

3. 2. An oil storage tank according to claim 1, wherein the oil barrier is attached to the base by bolts.

4. 2. The oil tank according to claim 1, wherein the steel frame forming the base is a channel steel material.

5. 2. The oil storage tank according to claim 1, wherein the steel frame forming the steel frame for the tank frame is a channel steel material.

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