JPH031440Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field The present invention relates to an oil suction pipe opening structure in an underground tank of a gas station.

(b) Conventional technology Conventionally, an oil suction pipe installed in an underground tank of a gas station has its tip connected to an above-ground refueling system, and its base end immersed in the oil in the underground tank. It was configured to suck up oil in an underground tank when activated.

Moreover, when multiple underground tanks are installed at a gas station, the multiple oil suction pipes connected to the same underground tanks are integrated in the middle and communicated with the refueling system, allowing oil suction work to be carried out from the multiple underground tanks. It was something to do.

(c) Problems to be solved by the invention However, when multiple underground tanks are buried at different heights, or when the diameters of multiple underground tanks are different, the oil level of these underground tanks is , because the oil absorption pipes are connected,
Therefore, the remaining oil levels in the plurality of underground tanks will be at different levels.

In such a situation, if oil is sucked up from multiple underground tanks via an oil supply system, the upper or smaller underground tank with less remaining oil will naturally run out of oil first, and the oil absorption work will end at that point. It is something that will happen.

That is, air is sucked in from one side of the oil suction pipe that has finished absorbing oil, and the oil in the other underground tank cannot be pumped up from the oil suction pipe, resulting in the oil supply system running out of oil.

(d) Means for solving the problem In this invention, a water remover is connected to the open end of the oil suction pipe that opens into the underground tank of the gas station, and the water remover is connected to the oil suction pipe and the water remover. An annular upper end opening that opens upward is provided, and a cylindrical float that moves up and down along the oil suction pipe is attached above the oil suction port, and the upper end opening can be freely opened and closed on the lower surface of the float. A ring-shaped on-off valve is installed on the bottom of the float, and
This invention provides an oil suction pipe opening structure in an underground tank of a gas station, characterized in that an on-off valve is connected through a bracket and a space for preventing air inflow is provided between the float and the on-off valve.

(e) Effect In this invention, multiple underground tanks with different diameters,
Alternatively, if multiple underground tanks are buried in different locations, and the oil suction pipes connected to each underground tank are integrated and connected to a refueling system, the same refueling system can suck up the oil in the underground tanks. Then, the amount of remaining oil in the small-diameter underground tank or the underground tank buried above decreases first, and when the oil level reaches the water remover position at the lower end of the oil suction pipe, the blockage valve loses its float function. The oil inflow path of the oil suction pipe is blocked, and thereafter air is blocked from flowing into the blocked oil suction pipe.

Therefore, the oil in the other underground tank, which has a large amount of residual oil, is sucked up through the lower end opening of the oil absorption pipe, so that both underground tanks are completely absorbed. Furthermore, in this invention, when the opening/closing plate closes the upper end opening provided in the water remover, oil enters the gap between the oil suction pipe and the float from the air inflow prevention space between the float and the opening/closing valve. , to block as much air as possible from entering the upper end opening from the same gap.

(f) Effects Therefore, according to the present invention, when the oil level in an underground tank reaches the water remover position at the bottom of the fuel tank, the oil inflow path of the oil suction pipe is automatically blocked, blocking the inflow of air. By doing so, the oil supply system can siphon up oil from the other underground tank without stopping. For example, when the oil supply system is buried in communication with underground tanks in different buried locations, it is possible to check the amount of remaining oil. By first blocking the oil suction pipes in the underground tanks, which have a small amount, the remaining oil in the underground tanks can be used reliably and effectively to the end. In particular, the air inflow prevention space between the float and the on-off valve blocks air from the gap between the oil suction pipe and the float, thereby reliably preventing air from entering the upper opening. Oil can be pumped up smoothly from the tank.

(g) Embodiment The embodiment of the present invention will be described in detail based on the drawings. Fig. 1 shows a cross-sectional side view of the present invention, in which 1 is an oil suction pipe, 2 is a lower end of the oil suction pipe, 3 is a water remover, and the water remover 3 is installed below the lower end portion 2 of the oil absorption pipe 1.

The water remover 3 is formed in the shape of a bottomed vessel with an upper opening, and further has a drainage hole 4 at the lower end of the bottom, and a holding arm provided at a certain interval in the upper opening 5. 6 is provided.

Usually, the water remover 3 is immersed in oil 0 together with the lower end 2 of the oil absorption pipe 1, and the oil 0 is immersed in the water remover 3.
The lower end 2 of the oil absorption pipe 1 passes through the upper opening 5 of the
It absorbs oil from. Moreover, when the water contained in the oil 0 is absorbed from the lower end 2 of the oil absorption pipe 1, the water with a heavy specific gravity is discharged downward from the drain hole 4 of the water remover 3, and the oil 0 Water is removed from the

The gist of the present invention is that in the water remover 3 having such a structure, a float F is attached in a surrounding manner around the lower end portion 2 of the oil suction pipe 1, and the float F is formed in a cylindrical shape, so that the oil suction pipe 1 The reason is that it is attached around the area so that it can be raised and lowered freely.

In other words, in zero oil, float F floats upward on the oil surface, and as the oil level falls, float F also falls, so as the oil level falls, the water remover 3 A float F closes the upper opening 5.

Furthermore, in this embodiment, as shown in FIG.
An on-off valve 7 is connected to the lower surface of the float F via a bracket 8 to provide an air inflow prevention space S communicating with a gap t between the oil suction pipe 1 and the float F.

Then, when the float F descends and closes the upper end opening 5 by the on-off valve 7, oil enters the gap t between the oil suction pipe 1 and the float F from the air inflow prevention space S. Air from the gap between the oil absorption pipe 1 and the float F is prevented from entering the upper end opening.

Further, as another embodiment of the present invention, a spherical blockage valve 7' is provided at the lower end opening of the oil suction pipe 1 so as to be openable and closable, and a float F is provided on the blockage valve 7'.
Float F
By moving up and down, the blockage valve 7' is opened and closed (see Fig. 3).

Note that 9 is a connecting rod that connects the closing valve 7' and the float F, and 10 is a pivot point in the middle of the connecting rod 9.

FIG. 4 is an explanatory diagram of the usage state showing a state in which a large-diameter underground tank 11 and a small-diameter underground tank 12 are buried, and the oil absorption pipe 1 of the large-diameter underground tank 11 is
-1 and oil absorption pipe 1- of small diameter underground tank 12
2 indicates a state in which they are integrated midway to form a common oil suction pipe 1-3, which communicates with the oil supply device 13 installed on the ground.

When the residual oil level in the small-diameter underground tank 12 reaches the residual oil level in the water remover 3, the float F descends and closes the upper opening 5, and the oil suction pipe 1-2 of the small-diameter underground tank 12 is opened. Due to the blockage state, the oil suction operation by the oil supply device 13 is
Oil is smoothly absorbed from the large-diameter underground tank 11 by extending only to the oil-absorbing pipe 1-1 of the large-diameter underground tank 11 with a large amount of residual oil.

In addition, Figure 5 is an explanatory diagram of the usage state in which the buried underground tank is in a high and low state. When the amount of remaining oil in the upper underground tank decreases, the remaining oil in the lower underground tank is sucked up, This principle is the same as that shown in FIG.

Furthermore, FIG. 6 shows a state in which a single underground tank is used, and when the level of residual oil in the underground tank drops to the water remover 3 at the lower end of the oil absorption pipe 1, the upper opening 5 is blocked. , to prevent air or water from being sucked into the oil absorption pipe 1.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of the oil absorption pipe of the present invention.
FIG. 2 is a sectional view taken along the line -- in FIG. 1. Figure 3 shows
Explanatory diagram showing another embodiment of the present invention. 4th, 5th, 6th
The figure is an explanatory diagram showing the state of use of the present invention. 1: Oil absorption pipe, 3: Water remover, 7: Blocking valve.

Claims (1)

[Scope of Claim for Utility Model Registration] A water remover 3 is connected to the open end of an oil absorption pipe 1 that opens into an underground tank of a gas station,
An annular upper end opening 5 that opens upward is provided between the oil absorption pipe 1 and the water remover 3, and a cylindrical float that rises and lowers along the oil absorption pipe 1 is provided above the upper end opening 5. At the same time as attaching F, an annular opening/closing valve 7 for freely opening and closing the oil intake port C is attached to the bottom surface of the float F, and a bracket 8 is also attached to the bottom surface of the float F.
An oil suction pipe opening structure in an underground tank of a gas station, characterized in that an on-off valve 7 is connected through the float F and an air inflow prevention space S is provided between the float F and the on-off valve 7.