JPS581516Y2 - Water and oil leak detection equipment in underground tank rooms - Google Patents

Description

[Detailed description of the invention] This invention relates to a water/oil leak detection device in an underground tank room for fuel storage.

According to the Fire Service Act, underground tanks at gas stations and underground fuel storage facilities are constructed using a simplified construction method (structures with only foundations and slabs, without walls), but they cannot be used when the groundwater level is high, or when underground tunnels or underground malls are nearby. It is necessary to carry out construction using the basic construction method (filling the wall with dry sand back into the underground tank room).

However, with this basic construction method, if there is water or oil leakage in the underground tank room, there is a risk that the tank will corrode and a secondary disaster may occur.

Therefore, the Fire Service Act requires that a leak detection pipe 15 shown in FIG. 3 be installed in an underground tank room.

This leakage detection tube 15 is a tube with a diameter of 25 to 32A, has a large number of pores 16 in its peripheral wall, and its length is equal to the dimension between the upper surface of the ceiling and the floor of the underground tank room.

However, since the diameter of this leak detection tube 15 is small, if sand accumulates inside it, it becomes difficult to check for water or oil leakage, and sand, water, and oil can be discharged from the leak detection tube, making it unusable. The disadvantage was that the period was short.

This idea easily detects water and oil leaks in underground tank rooms.
The present invention also aims to provide a detection device that can easily discharge these substances.

i The invention will be explained below based on drawings showing examples.

In Figure 1.2, an underground tank room 1 has four peripheral walls 2. 2. 3. 3, ceiling 4 and floor 5, and are made of reinforced concrete.

The floor 5 is supported by a required number of piles 6.

The upper surface of the ceiling 4 is four sides of the upper surface of the concrete earthen floor 7.

The fuel tank 8 is placed on a support 9 on the floor 5 and fixed to the support 9 by a band 10.

The space between the fuel tank 8 and the inner surface of the underground tank room 1 is filled with dry sand 11.

One or more fuel tanks 8 are arranged in the underground tank room 1, and a pipe 12 for detecting water and oil leaks is installed between them.
are installed vertically through the ceiling 4, floor 5 and dry sand 11 of the underground tank room 1.

The upper end of the pipe 12 is open and almost flush with the upper surface of the ceiling 4, and a lid 13 that can be opened and closed is attached to this.

In addition, a large number of pores 14 for collecting water and oil are provided at the lower part of the peripheral wall of the pipe 12, and the lower end of the pipe 12 is closed to form a pit 12a for water leakage, oil leakage, sand, etc. .

The lower end of the pipe 12 is accommodated in a receiving portion 5a provided on the lower surface of the floor 5 of the underground tank room 10.

The diameter of the pipe 12 is preferably large enough to allow a person to enter and exit the pit 12a in order to pump out the water, oil, and sand in the pit 12a.

Reference numeral 15 indicates a leak detection tube according to the above-mentioned legal regulations.

In the above configuration, the ceiling 4 of the underground tank room 1, the surrounding wall 2
, Water leakage from 3, oil leakage from fuel tank 8 is caused by dry sand 11
The water seeps into the interior of the pipe 12, and then passes through the pores 14 of the pipe 12 and falls into the pit hole 12a.

The presence and amount of small water in the pit 12a can be detected by opening the lid 13, and a submersible pump and a hose can be inserted into the pipe 12 to discharge the water by the pump.

This idea involves installing a pipe with an open top end and a closed bottom end through the dry sand in an underground tank room containing a fuel tank and dry sand, with the top end of the pipe almost flush with the top surface of the ceiling of the underground tank room. It is installed on a surface and has an openable and closable lid attached to the upper end, and a large number of pores for collecting water and oil are provided at the lower part of the surrounding wall of the pipe, so it has the following excellent f''LfL effect.

B. Water seeping into the dry sand from outside the underground tank and oil leaking from the fuel tank are effectively collected in the pipe, so the sand is always dry and corrosion of the fuel tank is prevented.

(b) The presence and amount of water and oil collected in the pipes can be easily detected by lifting the nob lid, and can be drained by a pump in the pit 1, so it can be placed under the tank room floor. Drainage can be done using a casing.

..., although it is a simple device, it achieves the above functions and improves the safety of underground tanks.

2.According to the regulations, four pipes of 40φ are required for each tank base, but in the present invention, even one pipe 12 is effective.

[Brief explanation of the drawing]

Figure 1 is a plan view of the underground tank in which this idea was implemented, Figure 2
The figure shows a sectional view taken along the line ■--■ in Fig. 1, and Fig. 3 shows a side view of the leak detection tube according to the Fire Service Act. 1... Underground tank room, 2, 3... Peripheral wall, 4... Ceiling, 5... Floor, 8...
...Fuel tank, 12...Pipe, 13...
...Lid, 14... Pore.

Claims (1)

[Scope of utility model registration request] A fuel tank is installed on the floor of a basement consisting of a ceiling, a peripheral wall, and a floor, and this fuel tank is located in an underground tank room covered with dry sand.The fuel tank has an inner diameter that allows a person to enter and exit the dry sand.The upper end is open and the lower end is closed. The pipes are installed vertically, with many small holes in the lower part of the parapet wall of the pipes, the upper end of the pipe is located almost on the same level as the upper surface of the ceiling of the underground tank room, and the upper end of the pipe is equipped with a lid that can be opened and closed. A water/oil leakage detection device characterized in that the lower end of the pipe is housed in a receiver provided on the lower surface of the floor to form a pit.