JP2721201B2 - Replenishment device for oil storage tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an oil storage tank provided with a control valve for connecting an inflow pipe and an oil supply pipe of an oil storage tank installed in a basement of a gas station such as a gas station. It relates to a supply device.

[Related Art] Conventionally, when replenishing oil from a lorry to an oil storage tank, there has been a case where oil is accidentally unloaded and overflows. Although various techniques for preventing such overflow are known, all of these known techniques have complicated structures and require large amounts of energy.

[Problems to be Solved by the Invention] Accordingly, the present invention utilizes a negative pressure generated at an outlet or a positive pressure of an oil storage tank, detects a full tank, closes a control valve, and uses a simple structure. It is an object of the present invention to provide a replenishing device for an oil storage tank that prevents overflow.

[Means for Solving the Problems] According to the present invention, in an apparatus for refilling an oil storage tank provided with a control valve for connecting an oil supply pipe and an inflow pipe of an oil storage tank, The control valve has a housing in which an oil supply pipe is connected to an inflow port formed on a side surface, and a housing in which an inflow pipe of an oil storage tank is connected to an outflow port formed on a lower surface. A housing is provided, and a diaphragm chamber defined by a diaphragm into two chambers, a negative pressure chamber and a positive pressure chamber, is formed in the operating part housing, and a valve seat is formed at an outlet in the housing. The valve seat is provided with a main valve which is biased by a spring in a valve closing direction, and the valve shaft of the main valve extends upward, passes through the positive pressure chamber of the diaphragm chamber, and is led out of the operating section housing, Locking pin on the diaphragm And one end is opened in the negative pressure chamber of the diaphragm chamber, and the other end is filled with the negative pressure generating part of the outlet and the underground tank. A negative pressure tube is provided which is open to each of the locations.

According to the present invention, in a supply device for an oil storage tank provided with a control valve for connecting an oil supply pipe and an inflow pipe of an oil storage tank, the control valve for connecting the oil supply pipe and the inflow pipe of the oil storage tank includes a control valve. A housing in which an oil supply pipe is connected to an inflow port formed on the side face, and an inflow pipe of the oil storage tank is connected to an outflow port formed on the lower face, and an operating section housing is provided on the upper face of the housing, A diaphragm chamber is formed in the lower housing by a diaphragm and defined as a negative pressure chamber and a positive pressure chamber. A valve seat is formed at an outlet in the housing, and the valve seat has a valve closing direction. The main valve, which is biased by a spring, is provided, and the valve shaft of the main valve extends upward, passes through the positive pressure chamber of the diaphragm chamber, and is led out of the operating portion housing, and a locking pin is provided on the diaphragm. Is provided on the valve shaft Is locked to the set has been locking grooves, positive pressure pipe is provided with an opening at the other end is opened at one end to the negative pressure chamber of the diaphragm chamber to fill-up position of the oil storage tank.

[Explanation of the operation and effect] According to the replenishing device for the oil storage tank configured as described above, the locking groove formed in the valve shaft is normally locked to the locking pin of the diaphragm to open the main valve. In addition, when lubricating,
When the lubrication hose of the lorry is connected to the lubrication pipe and the main valve is opened to lubricate, the oil flows into the oil storage tank from the inflow pipe through the lubrication pipe, the inlet and the outlet.

At this time, a negative pressure is generated in the negative pressure generating portion at the outlet by the flow, and air is sucked from the liquid detection opening at the full position of the oil storage tank. When the tank is full, the liquid detection opening is closed by the liquid, so that the liquid is suctioned from the opening of the negative pressure chamber of the diaphragm chamber to the negative pressure generating portion of the outlet, the diaphragm is operated, and the locking groove formed by the locking pin is formed. The lock is released and the main valve is
It is seated by the spring and lubrication is stopped.

Alternatively, when the tank is full, positive pressure acts on the positive pressure chamber of the diaphragm chamber from the oil storage tank by the positive pressure pipe, the diaphragm operates, the locking of the locking groove by the locking pin is released, and the main valve is seated by the spring. The lubrication is stopped.

Thus, according to the present invention, upon receiving a pressure signal from the opening in the oil storage tank when the tank is full, the diaphragm operates with a negative pressure generated at the outlet when lubricating, or a positive pressure generated in the oil storage tank, Close the main valve. Therefore, it does not require external motive energy, and operates reliably to prevent overflow.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a gas station embodying the present invention.
Two islands 61a and 61b are provided in the site 60 of the gas station. Each island has 2
Two refueling machines 62, 63 and 64, 65 are provided, and each refueling machine has two refueling nozzles 62a, 62b, 63, respectively.
a, 63b, 64a, 64b and 65a, 65b are provided.

On the other hand, in the site 60, three, for example, regular gasoline oil storage tanks 66a, 66b, 66c, two, for example, high-octane gasoline oil storage tanks 67a, 67b, and one, for example, light oil storage tank 68 are provided.

The inflow pipe 2 described later of each of the oil storage tanks 66a, 66b, and 66c is connected to one lubrication pipe 3A via a control valve 10 described later, and similarly, the oil storage tanks 67a and 67b are also connected to one oil storage pipe 3B. The oil storage tank 68 is connected to a single oil storage pipe 3C. Each of these oil storage tanks is connected to the oil supply hose piping of the oiler as shown in the figure.
4a to 4f.

In FIG. 2, an inflow pipe 2 is attached to an oil storage tank 66a, and the inflow pipe 2 is provided with lubrication pipes 3a and 3b constituting one lubrication pipe 3A through a control valve indicated by reference numeral 10. It is connected. The oil storage tank 66a has an air vent 4a
Are connected, and the control valve 10 is housed in the manhole cylinder 5,
At the opening of the manhole cylinder 5, a lid 6 is provided.

The housing 11 of the control valve 10 has an inlet 12, an outlet
13 are formed. The inflow pipe 12 is connected to the outflow port 13, the lubrication pipes 3 a and 3 b are connected to the inflow port 12, and an operating section housing 19 is provided above the inflow pipe 13. In addition, a valve seat 14 is formed at an end of the outlet 13, and the lubrication pipe 3 and the inflow pipe 2 communicate with each other through a small-diameter bypass passage 15 that bypasses the valve seat 14.

A main valve 17 urged in a valve closing direction by a spring 16 is housed opposite the valve seat 14. The valve shaft of its main valve 17
18 is extended upward and penetrates the operating part housing 19,
The transparent cap 20 is mounted on the upper part of the housing 19 and is provided with a knob 21 at a protruding end thereof.

On the other hand, a diaphragm chamber 22 is formed in the operating portion housing 19, and the chamber 22 is formed by a diaphragm 23 in a negative pressure chamber.
22a and a positive pressure chamber 22b are defined. This diaphragm
On the positive pressure chamber 22b side of 23, a locking pin 25 is provided via a piece 24, and the locking pin is provided on the valve shaft 18 when the main valve 17 is in the open position.
A locking groove 18a to be locked to 25 is formed.

The negative pressure chamber 22a is provided with a spring 26 for urging the locking pin 25 toward the locking side. The negative pressure tube 27 from the left chamber 22a is connected to the negative pressure generating portion near the lower portion of the valve seat 14. Opened to the detection opening 27a,
Further, the liquid detection opening 27b is branched and extended into the oil storage tank 66a, and the liquid detection opening 27b is opened at the full tank position. Further, a pressure equalizing pipe 28 that opens into the underground tank via the air vent 4a is provided, and the pressure equalizing pipe 28 is opened to the right chamber 22b. Alternatively, the negative pressure tube 27 may be omitted, and the pressure equalizing tube 28 may be opened to the full position of the oil storage tank 66a so that the pressure equalizing tube functions as a positive pressure tube.

In the control valve 10, the knob 21 is always pulled up to lock the locking groove 18a of the valve shaft 18 with the locking pin 25 of the diaphragm 23, and the main valve 17 is opened.

At the time of lubrication, connect the lorry lubrication hose to the lubrication pipe 3A, open the lorry main valve and lubricate the oil.
Underground tank 66a from inflow pipe 2 via inflow port 12 and outflow port 13
To the other oil storage tank via the oil supply pipe 3b. At this time, a negative pressure is generated in the opening 27a by the flow, and the negative pressure sucks air from the liquid detection opening 27b. When the liquid is full and the liquid detection opening 27b is closed with liquid, air is sucked from the negative pressure chamber 22a, and the diaphragm 23 is closed.
To the left, the locking pin 25 is moved to the left, and the locking groove 18a is
Release the lock. Accordingly, the main valve 17 is urged by the spring 16 to be seated on the valve seat 14 as shown by a chain line position 17 'to stop lubrication. At this time, the pressure equalizing tube 28 communicates the positive pressure chamber 22b with the space atmosphere of the oil storage tank 66a to ensure the operation of the diaphragm 23. As described above, when the pressure equalizing tube 28 functions as a positive pressure tube, the pressure equalizing tube 28 detects the liquid level at the liquid detecting opening with positive pressure, pre-presses the positive pressure chamber 22b through the opening 28a, and The main valve 17 is closed by displacing 23 to the left.

In addition, the bypass passage 15 is a control valve for all the oil storage tanks.
10 closes and plays a role in causing the oil remaining in the lubrication pipe 3A and the lubrication hose to flow down into the oil storage tank after closing the lorry main valve. Further, the transparent cap 20 plays a role of visually confirming the knob 21 and confirming the opening and closing of the main valve 17.

As described above, the knob 21 is pulled up to open the main valve 17 in advance, so that the pressure loss during lubrication can be reduced.

[Effects of the Invention] Since the present invention is configured as described above,
The following effects are obtained.

(A) When the oil storage tank is full, the control valve closes, so that there is no risk of oil overflow and safety can be improved.

The operation is performed by closing the control valve by operating the diaphragm with the negative pressure generated at the outlet due to lubrication or the positive pressure generated in the oil storage tank. Therefore, it operates safely and reliably without the need for external power energy.

(B) Further, the detection of the full tank is performed by a negative pressure pipe or a positive pressure pipe opened at the full tank position in the oil storage tank, and does not require a complicated device such as a sensor such as a float or a flow integrator.

(C) Then, if a plurality of underground oil storage tanks are connected to one lubrication pipe via control valves, respectively, the tanks are detected and filled, and the valves are closed, thereby greatly improving the workability of replenishment. .

[Brief description of the drawings]

FIG. 1 is a plan view showing a gas station implementing the present invention, and FIG. 2 is a longitudinal sectional view showing an embodiment of the present invention. 2 ... Inflow pipe, 3A ... Lubrication pipe, 10 ... Control valve, 11 ... Housing, 12 ... Inlet, 13 ... Outlet, 14 ... Valve seat,
16 ... spring, 17 ... main valve, 18 ... valve shaft, 19 ... operating part housing, 22 ... diaphragm chamber, 22a ... negative pressure chamber, 22b
…… Positive pressure chamber, 23 …… Diaphragm, 25 …… Locking pin, 27
…… Negative pressure tube, 27a …… Negative pressure detection opening, 27b …… Liquid detection opening, 28 …… Equalizing tube (positive pressure tube), 66a …… Oil storage tank

Claims (2)

(57) [Claims] In a replenishing device for an oil storage tank provided with a control valve for connecting an oil supply pipe to an oil storage tank inflow pipe, a control valve for connecting the oil supply pipe to the oil storage tank inflow pipe includes:
An oil supply pipe is provided at an inflow port formed on the side surface, and a housing is provided to which an inflow pipe of the oil storage tank is connected at an outflow port formed on a lower surface, and an operating section housing is provided on an upper surface of the housing. A diaphragm chamber is formed in the housing by a diaphragm and defined as two chambers, a negative pressure chamber and a positive pressure chamber. A valve seat is formed at an outlet in the housing, and the valve seat has a valve closing direction. A main valve biased by a spring is provided, and the valve shaft of the main valve extends upward, passes through the positive pressure chamber of the diaphragm chamber, and is led out of the operating portion housing, and a locking pin is provided on the diaphragm. And one end thereof is opened in the negative pressure chamber of the diaphragm chamber, and the other end is filled with the negative pressure generating part of the outlet and the full tank of the underground tank. Negative pressure tubes that open to each of the Supply device to an oil storage tank, characterized in that there. 2. A refilling device for an oil storage tank provided with a control valve connecting a lubrication pipe and an inflow pipe of an oil storage tank, wherein a control valve connecting the lubrication pipe and the inflow pipe of the oil storage tank includes:
An oil supply pipe is provided at an inflow port formed on the side surface, and a housing is provided to which an inflow pipe of the oil storage tank is connected at an outflow port formed on a lower surface, and an operating section housing is provided on an upper surface of the housing. A diaphragm chamber is formed in the housing by a diaphragm and defined as two chambers, a negative pressure chamber and a positive pressure chamber. A valve seat is formed at an outlet in the housing, and the valve seat has a valve closing direction. A main valve biased by a spring is provided, and the valve shaft of the main valve extends upward, passes through the positive pressure chamber of the diaphragm chamber, and is led out of the operating portion housing, and a locking pin is provided on the diaphragm. A positive pressure pipe, which is provided and is locked in a locking groove engraved on the valve shaft, has one end opened to the positive pressure chamber of the diaphragm chamber and the other end opened to the full position of the oil storage tank, is provided. To the oil storage tank Charging device.