JP3076808B2 - Liquid tank level gauge structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid level gauge structure capable of visually confirming a storage amount of liquid such as gasoline stored in a tank (height of a liquid level in the tank).

[0002]

2. Description of the Related Art There are roughly two types of known systems for attaching a visual type liquid level gauge to a tank. One is a method in which a transparent plate 2 is embedded in the side wall of the tank 1 so that the liquid level in the tank 1 can be directly checked, as shown in FIG. The other is that, as shown in FIG. 8, a liquid level gauge 2 of a transparent tube is erected and attached adjacent to the side wall of the tank 1, and the liquid in the tank 1 communicates with the transparent tube 2. This is a method to check the liquid level. In this method, the liquid level gauge 2 projects from the side wall of the tank 1.

[0003] In addition, containers (tanks) that carry flammable liquids while storing them are required to meet the standards for drop tests according to the Fire Service Law and its ordinances.
For example, in the case of gasoline (first petroleum), it is dropped at a drop height of 1.2 meters and filled with 98% or more of the gasoline in the tank 1, and there is no damage such as liquid leakage. There is a need. For this reason, the liquid level gauge 2 is naturally required to have strength enough to withstand the drop.

[0004]

The liquid level gauge 2 buried in the side wall of the tank 1 shown in FIG. 7 has a drawback that it is difficult to visually confirm it. Although the gauge 2 does not protrude outside, there is an advantage that it does not easily become an obstacle at the time of dropping. However, when the tank 1 is transported, the liquid level gauge 2 is used.
There is no guarantee that will not be damaged.

The liquid level gauge 2 protruding from the side wall of the tank 1 shown in FIG. 8 has an advantage that it can be easily checked visually, but a defect that it is easily broken is inevitable. For this purpose, a method is provided in which an enclosure 2a is provided around the liquid level gauge 2 for protection, as shown in the figure, but the protection is not sufficient, and the advantage that it is easy to confirm is lost. 2-59430).

That is, none of the conventional liquid level gauges 2 completely protects the tank 1 from the risk of breakage when transporting the tank 1 to a target place.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an overhang type liquid level gauge which can be easily checked visually and has no risk of breakage when transporting the tank. And

[0008]

In order to solve the above-mentioned problems, according to the present invention, in the above-mentioned overhang type liquid level gauge structure, a pipe for guiding the liquid in the tank to the bottom surface of the liquid tank is provided. While connecting one end, the other end of this pipe is extended to the side of the tank, the liquid level gauge is detachably connected to the other end of the pipe, and the pipe is sequentially connected from one end to the other end. A shutoff valve and a drain valve are interposed, and the bottom surface 4 of the liquid tank is provided.
Legs are provided at the corners, and the pipe and each valve are accommodated in an area surrounded by the legs.

In the liquid level gauge structure of the liquid tank configured as described above, when the liquid stored on the ground is used, the closing valve is opened and the drain valve is closed.
The liquid is guided to the liquid level gauge, and the liquid level in the tank is confirmed by the liquid level in the level gauge.

On the other hand, at the time of the test based on the Fire Service Law,
After confirming that the tank is filled with 98% or more of the liquid by the liquid level gauge, close the shut-off valve, then open the drain valve, and place the liquid in the pipe after the liquid level gauge and the shut-off valve. Drain the accumulated liquid. After completely draining, the liquid level gauge is removed, and a predetermined drop test is performed in that state. At this time, since the pipe and each valve protruding from the tank bottom are in the area surrounded by the legs, even if the pipes fall, damage to the pipes and the like is prevented by the legs. That is, no liquid leakage occurs.

Therefore, the tank is transported with the liquid level gauge removed, and after installation at the intended location, a level gauge is attached to the other end of the pipe, the drain valve is closed, the closing valve is opened, and the tank is connected to the liquid level gauge. Guides the liquid to exert its level gauge function.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS. 1 to 4, and as shown in the drawings, a bottom portion A of a tank 1 for storing liquid fuel such as gasoline having a size capable of being loaded and transported on a transport vehicle. To one end of a pipe 3 for communicating gasoline,
From the outlet end of the pipe 3, the joint 4, the joint 5, the stop valve (closing valve) 6, the pipe 7, the detachable joint 8, the joint 9, and the block 10 are connected to each other, and the piping system is extended to the side wall of the tank 1. To construct. The piping system is
The support 13 and the fixing bracket 14 support the tank 1 by bolting.

A drain valve 12 is attached to the bottom of the block 10 at the final end of the piping system via a joint 11, and a block 21 supporting the liquid level gauge 2 is fixed (attached) to the end of the block 10. The liquid level gauge 2 is erected along the side wall of the tank 1 with bolts 22, and the upper end of the liquid level gauge 2 is securely fixed to the side surface of the tank 1 by the support 23.

Although not shown, an openable and closable inlet, an inspection port and the like are provided on the upper surface of the tank 1. From the inlet, gasoline is injected into the tank 1 by an injection hose, and a predetermined amount is supplied. When the liquid is stored, the liquid level gauge 2 is visually checked to stop the injection.

On the bottom surface of the tank 1, a rectangular enclosure 30 is provided.
The frame 30 forms a leg of the tank 1.
Therefore, the pipe 3, the joint 3, and the like are stored in the frame 30 except for the liquid level gauge 2. Although not shown, a frame is also provided on the upper surface of the tank 1 to protect the above-described inlet and the like.

In this embodiment, the stop valve 6 is used when gasoline is installed on the ground.
Is opened, the drain valve 12 is closed, gasoline is led to the liquid level gauge 2, and the liquid level in the tank 1 is confirmed by the liquid level in the level gauge 2.

On the other hand, at the time of the test based on the Fire Service Law,
After confirming with the liquid level gauge 2 that the tank 1 is filled with 98% or more of the gasoline of the volume, the stop valve 6 is closed, and then the drain valve 12 is opened.
The gasoline stored in the liquid level gauge 2 and the fittings after the stop valve 6 is discharged. After complete discharge,
In the detachable joint 8, the liquid level gauge 2 is removed as shown in FIG. 4, and in this state, the tank 1 is dropped from a height of 1.2 meters. At this time, since the pipes 3 and the like and the joints projecting from the bottom surface of the tank 1 are in the area surrounded by the frame 30, even if the tank 1 falls,
This prevents damage to the pipe and the like. That is, it meets the standards of the Fire Service Law and does not leak.

Therefore, the tank 1 is transported with the liquid level gauge 2 removed, and after being installed at a target location, the liquid level gauge 2 is attached through the detachable joint 8, and thereafter,
The drain valve 12 is closed, the stop valve 6 is opened, and gasoline is guided to the liquid level gauge 2 to perform the function of the liquid level gauge 2.

FIGS. 5 and 6 show another embodiment. In this embodiment, the level gauge 2 is detached by its mounting bolts 22 as shown in FIG. Test and transport. In the figure, the same reference numerals are the same as those described above, and 15 is a T joint.

The material of the tank 1 is preferably made of metal in view of the required strength, rigidity, etc. In consideration of corrosion resistance, the material of the tank 1 is galvanized and made of stainless steel including joints. Is suitable.

In addition, pipe lines such as the pipe 3 and the joint 5
Design appropriately according to the conditions such as the size of the tank 1 and the size of the piping space, and select the screw-in type, screw-in welding type or flange type for the attachment of the joints 4 and 8. do it.

Further, regarding the liquid level gauge 2,
There are many commercially available products from specialized manufacturers that satisfy the above specifications, and it is easy to obtain products that are inexpensive to use off-the-shelf products and have excellent durability.

Incidentally, also in the embodiment shown in FIG. 1, the liquid level gauge 2 can be removed by loosening the mounting bolt 22.

[0024]

The present invention is configured as described above.
The drop test based on the Fire Service Law can be sufficiently cleared by an inexpensive and simple structure, and the effect of preventing the liquid level gauge from protruding and being damaged during transportation is great.

Also, as an effect that should not be overlooked,
If water is mixed into the gasoline inside the tank, the water will accumulate at the bottom of the tank due to the difference in specific gravity, and the accumulated water will
A boundary surface is formed with gasoline on the liquid level gauge, and it can be confirmed as a double layer. Therefore, by opening the drain valve, only water can be easily discharged, and normal gasoline can always be stored.

Further, since the liquid level gauge can be attached and detached, maintenance such as cleaning and replacement of the level gauge can be easily performed, and a normal state can be always maintained.

[Brief description of the drawings]

FIG. 1 is a partially cut front view of an embodiment.

FIG. 2 is a left side view of the embodiment.

FIG. 3 is a perspective view of a main part of the embodiment.

FIG. 4 is an operation explanatory view of the embodiment.

FIG. 5 is a partially cut front view of another embodiment.

FIG. 6 is a diagram illustrating the operation of the embodiment.

FIG. 7 is a schematic diagram of a conventional example.

FIG. 8 is a schematic diagram of a conventional example.

[Explanation of symbols]

 Reference Signs List 1 tank 2 liquid level gauge 3 pipe 4 fitting (elbow) 5 fitting (nipple) 6 stop valve (closing valve) 7 pipe 8 detachable fitting (union) 9 fitting (nipple) 10 block 11 fitting (nipple) 12 drain valve 13 Piping support 14 Block fixing bracket 21 Block 22 Bolt 23 Level gauge fixing bracket 30 Enclosure frame (leg)

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaaki Akasaka 2-12-35, Imafukunishi, Joto-ku, Osaka-shi In the Kinki Regional Construction Bureau, Osaka National Highway Construction Office (72) Inventor Masaki Matoba Joto, Osaka-shi 2-12-35, Imafuku-nishi-ku, Kinki Regional Construction Bureau, Osaka National Highway Construction Office, Ministry of Construction (72) Inventor Tadao Ogawa 1-112, Kitahorie, Nishi-ku, Osaka City Kurimoto Iron Works (56) Reference Literature Jpn. Sho 61-165425 (JP, U) Jpn. Hei 6-46326 (JP, U) J. Hankai H. 5-34196 (JP, U) J. Sho 63-62727 (JP, U) Registered utility model 3000264 (JP, U) JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G01F 23/02 B65D 25/20

Claims (1)

(57) [Claims] 1. A liquid level gauge 2 over which a liquid in a tank can freely enter and leave, is provided on a side surface of a transportable liquid tank 1 which is loaded and unloaded with a liquid. One end of a pipe for guiding the liquid in the tank is connected to the bottom of the liquid tank 1, and the other end of this pipe is extended to the side of the tank. The liquid level gauge 2 is detachably connected to the other end of the pipe. At the same time, the closing valve 6, the drain valve 1
2, and legs 30 are provided at four corners of the bottom surface of the liquid tank 1,
The liquid level gauge structure of the liquid tank, wherein the pipe and the valves 6, 12 are accommodated in an area surrounded by the legs 30.