JPS5815352Y2 - Oil leak prevention valve for underwater oil storage tank - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an oil leakage or water leakage prevention valve for an underwater oil storage tank.

Generally, as shown in Figure 1, an underwater oil storage tank is constructed by constructing an oil tank body a underwater (on the ocean floor, the bottom of a lake, etc.), and the oil tank body a is provided with an oil inlet/outlet at the upper end and a water inlet/outlet C at the lower end. Oil d is stored in the upper part of the oil tank body a, and water e is stored in the lower part of the oil tank body a, and oil is supplied to the oil tank body a from the oil inlet/outlet through the bottom oil supply pipe f by means of a bomb or the like. By doing this, when the water e is pushed out from the water inlet/outlet C, and the oil in the body a is absorbed by the same pump p, an amount of water corresponding to the amount of oil absorbed is absorbed into the oil tank body a from the water outlet/outlet C. It is constructed as a so-called oil-water displacement type.

However, in the conventional underwater oil storage tank mentioned above, the water inlet/outlet C
If the opening is simply an opening, there is a danger that if too much oil is fed in and stored, the oil will be released into the water from the water inlet/outlet, and if a valve is installed at the water inlet/outlet, the valve Since the valve is configured to open and close by remote control, for example, if the valve is closed prematurely during refueling, there is a risk that sufficient oil will not be stored, and as a result, the capacity of the oil storage tank will decrease. It turns out.

In addition, in the case of the type in which oil and water are separated by a diaphragm, it becomes difficult to remove the sludge that accumulates at the bottom of the oil tank body a, and folds occur in the membrane when oil is taken in and out. The folds are folded, and
If this process is repeated, material fatigue may occur and the membrane may be damaged.

Therefore, as a result of studies in view of the above-mentioned conventional circumstances, the present invention has been developed to create an oil leakage and water leakage prevention valve for underwater oil storage tanks. By configuring a float valve using a float valve, the water inlet/outlet or oil inlet/outlet can be automatically opened/closed in response to changes in oil/water displacement, and oil leakage from the water inlet/outlet and water suction from the oil inlet/outlet can be prevented with a simple configuration. The goal is to be able to stop them in a timely manner.

The drawings showing the embodiments of the present invention will be described in detail below.
In Figures 2 and 3, iron or steel structures built underwater,
An oil tank body 1 made of concrete or the like is provided with an oil inlet/outlet 2 and a water inlet/outlet 3 at its upper and lower ends, respectively, and a valve seat 4 having a spherical seat 4a is disposed in the oil inlet/outlet 2 or the water inlet/outlet 3. , a long cylindrical stopper 5 is installed vertically from the valve seat 4 in the direction of oil-water interface fluctuation, and the specific gravity of the cylindrical stopper 5 is set in advance to be smaller than that of water and larger than that of oil. A ball valve 6 formed to float on water and sink in oil is loosely fitted, and the valve hole 7 is opened and closed in response to changes in the oil-water interface due to oil-water replacement in the oil tank body 1, and the oil inlet/outlet 2,
Alternatively, a float valve is configured to automatically open and close the water inlet/outlet 3.

When installing the float valve configured as described above in the oil inlet/outlet 2, as shown in FIG. A shaped stopper 5 is vertically installed in the oil tank body 1 from the oil inlet/outlet 2, communicates with the valve hole 7, and connects an oil heating pipe 9 to the valve seat 4 by a known suitable means.

Further, the valve obtained in the present invention is one valve 7L7 as described above.
, a cylindrical stopper 5, and a ball valve 6, a multi-stage valve structure as shown in FIG. 3, and a shared valve structure as shown in FIG. 4.

That is, the single valve structure is as shown in FIG. 2 and described above, but the multi-stage valve structure has a spherical seat on the valve seat 4, respectively, to the upper end opening, as shown in an example implemented at the water inlet/outlet 3 in FIG. 4
A, 4 a', 4a'', . . . a plurality of valve holes 7, 7', 7'', . Cylindrical stoppers 5.5', 5'', etc. are formed into valve holes, and ball valves 6, 6', 6'', etc. are loosely fitted in corresponding to these valve holes, respectively. It has a configuration in which it is vertically installed from the seat 4.

The valve seat 4 is integrally made of plastic or stainless steel and is formed into a case shape, so that it can be conveniently inspected periodically and replaced with one that has been inspected. After fitting into the water inlet/outlet 3, it is detachably attached to the wall surface of the oil tank body 1 by fixing bolts 8, etc.

When the multi-stage valve structure is formed in this way, the boundary surface between oil and water is lowered as oil is supplied into the oil tank body 1, and as a result, as shown in FIG. 3, the ball valves 6, 6' floating in the water,
6" is 6.6', 6" in the order of spherical seats 4a, 4a', 4a
'' and close the valve holes 7, 7', and 7'' in order, thus closing the water inlet/outlet 3 gradually rather than all at once, so a sudden shock load is applied to the oil pump etc.) There is no speech, and the water hammer phenomenon can therefore be prevented.

Further, as shown in FIG. 4, the above-mentioned common valve structure has an oil inlet/outlet 2 and a water inlet/outlet 3 provided in the oil tank body 1 on the same axis, and valve seats 4, 4 are disposed facing each other. The two valve seats 4, 4 are connected by a cylindrical stopper 5, and a ball valve 6 is loosely fitted into the cylindrical stopper 5.

Of course, the cylindrical stopper 5 is vertically disposed in the directions g and g' of variation of the interface 12 between the oil 10 and the water 11 in the oil tank body 1.

By forming such a common valve, the boundary surface 1 can be used both when sucking out the oil 10 from the oil tank body 1 and when refueling the oil tank body 1.
The ball valve 6 follows the fluctuation of the water 11 and seats on the respective valve seat 4 or 4 to close the oil inlet/outlet 2 or the water inlet/outlet 3.
Therefore, one cylindrical stopper 5 and one ball valve 6 can prevent both openings 2 from being sucked out and blowing out the oil 10.
.
The depth of the interface 12 between the oil and water 11 can be measured, and the amount of oil stored can be easily measured.

Further, in FIG. 3, reference numeral 13 indicates an oil-water interface alarm sensor disposed on the upper side of the water inlet/outlet 3 in the oil tank body 1, and in order from the upper part to the lower part, a caution sensor 13a, a stop sensor 13b , Emergency Stop Center 13
C is arranged, and when a predetermined amount of oil 10 is stored in the oil tank body 1, an alarm buzzer sounds, and when refueling is performed, a stop signal and an emergency stop signal for the oil feed pump are sent. There is.

Therefore, when the above-mentioned valve of the present invention and the above-mentioned alarm sensor 13 are used together, even if oil is supplied after the alarm buzzer sounds as described above, the valve closes and the water inlet/outlet 3 is closed.
The hydraulic pressure inside the oil tank body 1 rises rapidly, and therefore, even if the oil feed pump is driven and rotated, oil is not supplied into the oil tank body 1, and oil leakage is completely prevented.

Note that 14 in FIG. 3 indicates a screen that prevents foreign matter from entering.

As explained above, according to the oil leakage prevention valve for an underwater oil storage tank according to the present invention, the interface 12 between the oil 10 and the water 11 from the valve seat 4
A cage-like stopper 5 is vertically extended in the direction of the fluctuation of the water, and a ball valve 6 formed with a specific gravity smaller than that of water and larger than that of oil is loosely fitted to follow the fluctuation of the boundary surface 12. Since the valve hole 7 is configured to open and close automatically, the on-off valve for the oil inlet/outlet 2 or the water inlet/outlet 3 of the oil/water displacement submersible oil storage tank in which the oil 10 is stored above the water 11 can be used. By using it as, for the oil tank body 1,
During refueling, the ball valve 6 sinks and closes due to the lowering of the oil-water interface 12, thereby closing the water inlet/outlet 3. When oil is sucked out, the ball valve 6 rises as the interface 12 rises. The valve opens at the water inlet/outlet 3, and the valve closes at the oil inlet/outlet 2 to close the oil inlet/outlet 2, so there is no need for special operations to prevent oil leakage during refueling and to suck out water during oil suction. can be automatically and completely prevented,
Furthermore, even when installed at the oil inlet/outlet 2, if the oil-water interface 12 descends as refueling occurs, the ball valve 6 will sink into the oil 10 and descend, so it will not interfere with refueling, and the structure is simple, so sludge etc. Since there are few adverse effects, there are almost no failures, and periodic inspections are easy to perform and can be carried out at low cost, which has practical effects.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view showing an example of an underwater oil storage tank, Fig. 2 is a longitudinal side view showing an embodiment of an oil leakage prevention valve for an underwater oil storage tank according to the present invention, Figs. The figures are longitudinal sectional side views showing other embodiments of valve opening. 1...Oil tank body, 2...Oil inlet/outlet, 3
...Water inlet/outlet, 4...Valve seat, 5, 5'
, 5″...Lump stopper, 616′+6″・
... Ball valve, 10 ... Oil, 11 ...
・Water, 12...The interface between oil and water.

Claims (3)

[Scope of utility model registration request] (1) A valve seat is provided at the water or oil inlet/outlet of the main body of the oil tank constructed underwater, and a long block stopper is hung from the valve seat in the direction of the water/oil interface fluctuation, so that the specific gravity is that of water. An oil leak prevention valve for an underwater oil storage tank, which is formed by loosely fitting a ball valve that is smaller and larger than that of oil. (2) The scope of the utility model registration claim, in which a plurality of valve seats each having a vertical block stopper with a ball valve loosely fitted thereon are formed in a multi-stage shape with steps in the direction of the water-oil interface fluctuation. The oil leakage prevention valve for an underwater oil storage tank as described in item 1. (3) For the underwater oil storage tank according to claim 1, wherein the valve seats are arranged at the water inlet and outlet and the oil inlet and outlet, respectively, and are connected by a block-like stopper into which a ball valve is loosely fitted. Oil leakage prevention valve.