JP2000238889A - Underground buried petroleum storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underground buried petroleum storage device excellent in safety, maintenance, and economical efficiency which prevents the piping, such as an oil feed pipe, vent pipe, oil carry pipe, and oil return pipe, of the underground buried storage device having a tank storage part, all being disposed in underground, electrical wiring for an electrical wiring liquid level sensor, and so on from being damaged due to the pressure of the underground or corroded due to underground water, which can be managed by a simple inspection work, and which needs no digging and embedding works even if they are damaged or corroded. SOLUTION: In an underground embedded type petroleum storage device comprising a tank storage part 3, an oil feed pipe 4, a vent pipe 5, an oil carry pipe 6, a return pipe 7, and a liquid level sensor 8 and having on the top of its tank storage part 3 a protector chamber 9 for protecting the liquid level sensor 8, an oil-feed mounting opening 4A, a vent-pipe mounting operning 5A and so on, a piping protective chamber 10 for protecting the oil feed pipe 4 from the oil-feed-pipe mounting opening 4A and the vent pipe 5 from the vent- pipe mounting opening 5A is provided above the tank storage part 3 and next to the protector chamber 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground type oil storage device which is buried underground to store petroleum such as kerosene, gasoline and heavy oil.

[0002]

2. Description of the Related Art Petroleum products such as kerosene stored in a storage tank provided outside in an apartment house, a general home, etc.
Although they are used by sending them to household combustion equipment and the like, storage tanks provided underground have recently become increasingly popular in terms of safety and effective use of above-ground parts. Conventionally,
This type of underground oil storage facility has a tank storage section for storing petroleum such as kerosene, an oil supply pipe for refueling the tank storage section with these oils, a ventilation pipe for ventilating the tank storage section with the outside air, An oil feed pipe for feeding oil from the tank storage to the outside, an oil return pipe for returning excess oil from the tank outside to the tank storage, and a liquid level sensor for detecting the amount of the oil stored in the tank storage. In addition, a protector room is provided at the upper part of the tank storage section, which is usually provided with a manhole to protect the sensor, the oil supply pipe connection port, and the ventilation pipe connection port so as to be inspectable.

When burying a storage tank, piping such as an oil supply pipe, a ventilation pipe, an oil supply pipe, and an oil return pipe,
After the tank storage part is buried underground, piping such as an oil supply pipe from the oil supply pipe installation port in the protector room, a ventilation pipe from the ventilation pipe installation port, an oil supply pipe from the oil supply pipe installation port, and a oil return pipe from the oil return pipe installation port And raised at a predetermined position while crawling on the excavated surface, fixing one end of the pipe to the outer wall of the building, and particularly connecting the oil feed pipe and the oil return pipe to an electric pump or the like. Similarly, the liquid level sensor was also electrically connected from the liquid level sensor head in the protector room and connected to a liquid level indicator installed on an outer wall or the like.

[0004] These pipes, such as steel pipes, copper pipes, and FRP pipes, including wiring parts such as electric wiring, are then covered with soil and the like and buried in the ground as they are. In addition, if the connection part of the pipe in the ground is connected by a method other than welding (such as screwing), an inspection port is required from the viewpoint of safety, so the connection method by welding is generally used. It is used for

[0005]

However, pipes such as oil supply pipes, ventilation pipes, oil supply pipes, oil return pipes, and electric wiring for wiring liquid level sensors, which are disposed underground, have a pressure from the ground. They are susceptible to corrosion due to groundwater or groundwater, and if they are damaged or corroded, they must be dug up and backfilled. In particular, the connection part due to welding of the pipe is easily affected, and if the welded part is damaged, of course, periodic inspection is also required, so digging around the pipe part becomes frequent, and safety and maintenance There was a major problem in terms of economy and economy.

[0006]

Means for Solving the Problems The inventor of the present invention has conducted intensive studies to solve the above-mentioned problems. As a result, the oil supply pipes and the ventilation pipes are protected by placing them in a protection room or the like. The present inventors have found that damage and erosion due to pressure from the ground and groundwater can be prevented, and have completed the present invention.

That is, the underground oil storage device of the present invention comprises:
Kerosene, gasoline, having a tank storage for storing petroleum such as heavy oil, an oil supply pipe for supplying the petroleum to the tank storage, a ventilation pipe for ventilation between the tank storage and the outside air,
An oil feed pipe for feeding the petroleum from the tank storage to the outside, an oil return pipe for returning the petroleum from the outside of the storage tank to the tank storage, and a liquid level for detecting the storage amount of the petroleum In an underground oil storage device provided with a sensor and provided with a protector room for protecting the liquid level sensor and an oil supply pipe mounting port, a vent pipe mounting port, etc. at an upper part of the tank storage part, A pipe protection chamber is provided in the protector chamber to protect the oil supply pipe from the oil supply pipe attachment port and the ventilation pipe from the ventilation pipe attachment port. The underground oil storage device of the present invention is preferably made of substantially fiber-reinforced plastics.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a schematic view illustrating an embodiment of an underground oil storage device according to the present invention. The underground oil storage device 1 of the present invention has a tank storage unit 3 for storing petroleum 2 such as kerosene, gasoline, and heavy oil, and an oil supply pipe 4 for refueling the tank storage unit 3 with the oil 2. ,
A vent pipe 5 for ventilating the tank storage 3 with the outside air; an oil feed pipe 6 for feeding the petroleum 2 from the tank storage 3 to the outside of the tank; and a return for returning the petroleum 2 to the tank storage 3 from the outside of the tank. An oil pipe 7 and a liquid level sensor 8 for detecting the storage amount of the petroleum 2 in the tank storage section 3 are provided. Above the tank storage section 3, the liquid level sensor 8 and an oil supply pipe mounting port 4A, a ventilation pipe mounting port 5A and the like are provided. In the underground type oil storage device provided with a protector room 9 for protecting the oil supply pipe, the oil supply pipe 4 from the oil supply pipe attachment port 4A and the ventilation pipe attachment port 5A are connected to the upper part of the tank storage unit 3 in connection with the protector chamber 9. A pipe protection chamber 10 for protecting the ventilation pipe 5 is provided.

[0009] Petroleum 2 such as kerosene is carried by a tank lorry or the like, is injected from a fuel supply port 4B, and is stored in a tank storage unit 3 through a fuel supply pipe 4. One port on the ground of the oil feed pipe 6 is connected to an electric pump 12 or the like, and the petroleum 2 in the tank storage unit 3 is fed to the ground combustion equipment (omitted) through the oil feed pipe 6. . At this time, the overflowed petroleum is returned to the tank storage unit 3 again through the oil return pipe 7. The detection unit of the liquid level sensor 8 is located in the tank storage unit 3, detects the liquid level of the petroleum 2, and the signal is electrically wired from the head of the liquid level sensor 8 in the protector room 9. It communicates with the liquid level indicator 11 placed on the wall surface of the structure on the ground, and can be confirmed from the ground. In the protector room 9 located on the tank storage section 3, there are provided an oil supply pipe mounting port 4A, a ventilation pipe mounting port 5
A, an oil supply pipe attachment port 6A and an oil return pipe attachment port 7A are provided. The inside of the tank storage section 3 and the atmosphere are ventilated through the vent pipe 5.

In the underground oil storage device 1 of the present invention, the pipe protection room 10 is provided above the tank storage unit 3 so as to be connected to the protector room 9 and is integrated with the tank storage unit 3 and the protector room 9. Let it. The shape of the pipe protection chamber 10 is not particularly limited as long as it is a chamber having a space, and may be any shape such as a substantially cylindrical shape, a rectangular parallelepiped, or a combination thereof. The piping of the oil supply pipe 4 and the ventilation pipe 5 is performed such that the oil supply pipe 4 and the ventilation pipe 5 are attached to the oil supply pipe attachment port 4A and the ventilation pipe attachment port 5A in the protector chamber 9, and the pipe protection chamber 10 is penetrated. Just do it. By placing the oil supply pipe 4 and the ventilation pipe 5 in the pipe protection chamber 10 in this way, the oil supply pipe 4 and the ventilation pipe 5 can be protected even under the ground.

An oil supply pipe 4 and a ventilation pipe 5 are provided in the pipe protection chamber 10.
It is preferable to provide a pipe start-up section 10A for starting the gas on the ground. Further, the piping protection chamber 10 has a piping inspection opening 10C having a piping inspection opening lid 10C so as to divide the space therebetween.
By providing B, it is possible to observe the oil supply pipe 4, the ventilation pipe 5 and the like below the pipe inspection port 10B, and sequentially inspect and observe the ground from the ground. Preferably piping inspection port 1
0B is arranged so as to be located immediately above a connection portion of the oil supply pipe 4 and the ventilation pipe 5 by welding or the like. Piping inspection port 10
B can be provided in a plurality of parts,
The provision of B is not essential in the underground oil storage device 1 of the present invention. In addition, in the pipe protection chamber 10, except for the oil supply pipe 4 and the ventilation pipe 5, the oil supply pipe 6,
The oil return pipe 7 and the wiring 11A for the liquid level indicator from the liquid level sensor 8 may be provided outside instead of being provided inside. FIG. 2 shows that the oil supply pipe 4, the ventilation pipe 5, and the wiring 11 A for the liquid level indicator from the liquid level sensor 8 pass through the pipe protection chamber 10, and the oil supply pipe 6 and the oil return pipe 7 are disposed inside. This is an example in which it is arranged on the outside without being used.

In the underground oil storage device 1 of the present invention, materials that can be used for the piping such as the oil supply pipe 4, the tank storage unit 3 except the liquid level sensor 8, the protector room 9, the piping protection room 10, and the like are as follows. Although there is no particular limitation, a known material such as a metal such as steel or a fiber reinforced plastic can be used, but a fiber reinforced plastic (hereinafter, referred to as FRP) having excellent workability, economy, and durability can be used. Is preferred. Examples of the material used for the FRP include, for example, known reinforcing fibers such as glass fiber, carbon fiber, and aramid fiber as the reinforcing fiber, and examples of the matrix resin include an epoxy resin and an unsaturated polyester resin. Thermosetting resins such as vinyl ester resins and phenol resins can be mentioned. Preferably, glass fiber is used as the reinforcing fiber and unsaturated polyester resin is used as the matrix resin from the viewpoints of chemical resistance, price, strength, and the like.

Oil supply pipe 4, ventilation pipe 5, oil feed pipe 6, oil return pipe 7
The material is not particularly limited, and may be made of FRP, but may be a steel tube, a copper tube, a plastic tube, or the like, which is conventionally used. They may be coated with a plastic such as a polyethylene resin, a polypropylene resin, or a vinyl chloride resin. The polyethylene-coated copper pipe is preferably used because it is easy to bend when a relatively small diameter is used, such as the oil feed pipe 6 and the oil return pipe 7. Pipes such as oil supply pipes 4 and ventilation pipes 5
If it is necessary to increase the length, it may be connected by welding, screwing, or the like, and then added. Petroleum that can be stored in the underground oil storage device 1 of the present invention is kerosene, gasoline, heavy oil, light oil, and the like.

In burying the underground oil storage device 1 according to the present invention, the tank storage unit 3 is buried under the ground, and the protector room 9 and the piping protection room 10 are buried so that the highest portions are above the ground surface. I just need. Preferably, the highest part of the protector room 9 and the piping protection room 10 may be buried so that both are at the same height as the ground surface. In particular, the pipe inspection port 10B of the pipe protection chamber 10, the pipe start-up section 10A,
It is preferable that the highest part of the protector room 9 is buried so as to have the same height as the ground surface. This is because inspections and observations from the ground can be performed while effectively using the buried site.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an underground oil storage device according to the present invention will be described in more detail with reference to the drawings. 1) Manufacture of the protector room 9 and the pipe protection room 10 First, only the tank storage section 3 of the underground oil storage device 1 of the present invention is previously made of FRP using glass fiber as a reinforcing material and unsaturated polyester resin as a matrix resin. Made.
Next, according to the burial diagram of the place where the underground oil storage device 1 is installed, the distance from the installation position of the tank storage unit 3 to the building, the burial depth of the tank, the oil supply pipe 4 and the ventilation pipe 5, and the necessary liquid level Number of wires 11A for the liquid level indicator from the sensor 8,
The position to be set up on the ground and the number and position of the pipe inspection ports 10B were confirmed, and the member for the protector room 9 and the member for the pipe protection room 10 were cut into various dimensions. At this time, the pipe inspection port 10B of the pipe protection chamber 10 was provided above the location where the oil supply pipe 4 and the ventilation pipe 5 were to be connected by welding. Next, the joint between the protector chamber 9 and the pipe protection chamber 10 and the joint between the pipe rising section 10A and the pipe inspection port 10B of the pipe protection chamber 10 are bonded to the tank storage section 3 by FRP overlay bonding and integrated. did. The material of the member for the protector chamber 9 and the material of the member for the pipe protection chamber 10 were made of FRP made of the same material as that of the tank storage unit 3.

2) Manufacture and Installation of Piping Member First, the oil supply pipe 4 is made of a polyethylene-coated steel pipe, and the oil supply pipes 4 are connected to each other using a welded pipe joint. A socket was attached as a filler port 4B for the part. After installation, perform an airtight inspection,
After confirming that the connection by welding is sufficiently connected, the oil supply pipe 4 is attached to the oil supply pipe mounting port 4A, and the protector chamber 9, the pipe protection chamber 10, the pipe riser 10
We prepared through A. The ventilation pipe 5 is made of a polyethylene-coated steel pipe made of the same material as the oil supply pipe 4. The connection between the ventilation pipes 5 is made by using a welded pipe joint, and then the ventilation pipe 5 is connected to the ventilation pipe mounting port 5A. And, like the oil supply pipe 4, were prepared through the protector chamber 9, the pipe protection chamber 10, and the pipe rising section 10A.

The oil feed pipe 6 is made of a polyethylene-coated copper pipe. The oil feed pipe 6 is bent from the lid of the tank storage unit 3 in accordance with the shape of the protector chamber 9 while performing bending processing. The inside of the starting part 10A was piped and prepared. Next, the liquid level sensor 8 is installed in the liquid level sensor mounting opening 8A, and the wiring 11A for the liquid level indicator passed through the protection tube is cut into a predetermined length and connected to the liquid level sensor 8, Preparations were made through the inside of the protector room 9, the piping protection room 10, and the piping rising section 10A. With the above, preparations before the installation of the tank storage device on site were completed.

3) Installation work of the tank storage device After digging the burial place at the installation site of the tank storage device and performing the work of placing the lower surface slab, the main body of the underground oil storage device 1 prepared above is removed. It was carried in and placed on the slab. After installation, the surrounding area was backfilled with river sand 13 until the main body was hidden.

4) Piping work The oil supply pipe 4 and the ventilation pipe 5 were fixed to the wall using a pipe fixing tool. The oil feed pipe 6 and the oil return pipe 7 were connected to the electric pump 12. The liquid level indicator 11 was attached to the wall of the building, and the electric wire 11 for connecting the liquid level gauge was wired. The height of the highest part of the protector room 9 and the height of the pipe inspection port 10B of the pipe protection chamber 10 were adjusted, and cut at the ground surface line. The lid 9A directly above the protector room 9 and the piping inspection lid 10C
Was installed. Thereafter, the area around the protector chamber 9, the pipe protection chamber 10, and the pipe rising section 10A was backfilled with river sand 13. Thus, the installation work of the underground oil storage device of the present invention has been completed.

[0020]

According to the present invention, the piping protection room provided in the underground oil storage device of the present invention prevents dangerous substances from leaking from the pipes and connections and infiltration of groundwater, which is a conventional problem, and also facilitates pipe connection. Since the parts can be inspected, digging work is not required for repairing damaged parts, and it can be buried safely in piping work. Also, the pipes of the underground oil storage device of the present invention were previously manufactured integrally with the tank storage unit, and buried on site,
Since the work is completed only by the work of fixing the wall surface of the pipe above the ground and the liquid level indicator, the lubrication pipes and communication pipes that were conventionally used at the installation site using pipe materials such as steel pipes, copper pipes, and FRP pipes Since there is no need to cut or weld the trachea, oil supply pipe, oil return pipe, etc., the number of days required for construction can be significantly reduced. The underground petroleum storage device of the present invention can also be used as a storage device for organic solvents other than petroleum, organic acids, inorganic acids, organic-inorganic dilute solutions, and the like.

[Brief description of the drawings]

FIG. 1 is a schematic view illustrating an embodiment of an underground oil storage device according to the present invention.

FIG. 2 is a partial schematic view illustrating another embodiment of the underground oil storage device of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Underground oil storage device 2 Petroleum 3 Tank storage unit 4 Oil supply pipe 4A Oil supply pipe attachment port 4B Oil supply port 5 Ventilation pipe 5A Ventilation pipe attachment port 6 Oil supply pipe 6A Oil supply pipe attachment port 7 Return oil pipe 7A Return oil pipe attachment port 8 Liquid level sensor 8A Liquid level sensor mounting port 9 Protector room 9A Protector lid 10 Pipe protection room 10A Pipe start-up section 10B Pipe inspection port section 10C Pipe inspection port lid 11 Liquid level indicator 11A Wiring for liquid level indicator 12 Electric pump 13 River sand

Claims (2)

[Claims] 1. A tank storage section for storing petroleum such as kerosene, gasoline, and heavy oil, an oil supply pipe for supplying the petroleum to the tank storage section, and a passage for ventilating the tank storage section with outside air. Trachea, an oil feed pipe for feeding the petroleum from the tank storage to the outside, an oil return pipe for returning the petroleum from the outside of the tank to the tank storage, and a storage amount of the petroleum in the tank storage. Equipped with a liquid level sensor to detect,
In an underground oil storage device provided with a protector room for protecting a liquid level sensor and an oil supply pipe mounting port, a ventilation pipe mounting port, and the like at an upper part of the tank storage part, the upper part of the tank storage part is connected to the protector chamber. And a pipe protection chamber for protecting the oil supply pipe from the oil supply pipe installation port and the ventilation pipe from the ventilation pipe installation port. 2. The underground oil storage device according to claim 1, which is made of substantially fiber-reinforced plastics.