JP2952860B2 - Shut-off valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shut-off valve for shutting off the outflow of fuel oil itself and volatile gas when an emergency such as tilting or overturning of a metering device for supplying fuel from an underground tank to a vehicle or the like occurs. Related to the structure.

[0002]

2. Description of the Related Art Conventionally, a flexible pipe has been used as a connecting pipe between a suction pipe for sucking fuel from an underground tank and a measuring machine for supplying fuel oil to a vehicle, and the measuring machine main body falls down or tilts due to an impact or the like. It is fixed to the ground by anchor bolts so that it does not. However, no matter how the weighing machine is fixed with anchor bolts or the like, in the event of a car collision or an earthquake, the weighing machine may be tilted or fall over due to an excessive impact.

[0003] When the weighing machine inclines or falls, the flexible pipe having the weakest strength is deformed, and in the worst case, cracking or cutting often occurs. If the flexible pipe is cracked or cut, dangerous gas such as gasoline inside the weighing machine will flow from the weighing machine to the outside, and dangerous gas will leak from the underground tank. Become.

Therefore, Japanese Patent Application No. 9-320191 discloses that
There has been proposed a shutoff valve structure having an engagement between a lock stay and a cam connected to a wire. However, this shutoff valve structure has the following problems.

That is, when the shut-off valve is set on site, it is necessary to engage the lock stay with the cam, adjust the length of the wire, and the like, and this operation requires time.

Further, since the pulling force or the pressing force of the wire is directly converted into the rotation force of the lock stay, if the wire is accidentally brought into contact with the wire during maintenance or the like, the shut-off valve may malfunction. is there.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in a conventional shut-off valve for shutting off the flow of fuel oil itself and volatile gas in the event of an emergency such as tilting or overturning of a weighing machine. It is in.

[0008] That is, a first object of the present invention is to provide a novel shut-off valve structure that can be easily mounted.

Another object of the present invention is to provide a shut-off valve structure that is less likely to malfunction even if the wire is inadvertently contacted during maintenance or the like.

[0010]

SUMMARY OF THE INVENTION The present invention is directed to a connecting pipe connecting between a suction pipe for sucking fuel oil from an underground tank and a weighing machine, on both the weighing machine side and the suction pipe side , or on either side thereof. A rotatable rotatable unit that is installed at the joint and that closes when a load of a predetermined amount or more is applied due to the inclination or overturn of the weighing machine .
It is a shutoff valve having a valve body .

The valve body preferably includes a fixing member for locking the rotatable valve body, and the fixing member preferably releases the locking of the valve body by a load equal to or more than the predetermined amount. Preferably, the fixing member is connected to the suction pipe or the weighing machine by a connecting member. More preferably, the fixing member is formed by a pin having a predetermined length which can be broken or moved by a load of a predetermined amount or more from the connecting member.

The form of the connecting member is not particularly limited as long as the connecting member has a function of transmitting a pulling force or a pressing force due to inclination or overturning of the weighing machine to the fixing member. However, it is possible to act on the fixing material in various forms of bias such as tension, relaxation, rotation, movement, bending, cutting, bending, and the like.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an embodiment of a mounting mechanism of a shut-off valve according to the present invention, wherein 1 denotes a weighing machine in which a suction pump 2 is arranged. Reference numeral 3 denotes a suction pipe which communicates with an underground tank (not shown) and sucks fuel such as gasoline stored in the tank. The opening of the suction pipe is arranged in the pit 4.

Reference numeral 5 denotes a flexible pipe connecting between the weighing machine 1 and the suction pipe 3. The flexible pipe 5 has a flange 6 at one end thereof connected to a flange 9 of the suction pipe 3 and a flange 7 at the other end thereof connected to a flange 8 provided at an opening of the suction pump 2 of the measuring machine. And suction tube 3
And are connected.

Reference numeral 10a denotes a shut-off valve mounted between the flange 6 of the flexible tube 5 on the suction tube side and the flange 9 of the suction tube 3, and 10b denotes a flange 7 on the measuring device side of the flexible tube 5 and the measuring device. This is a shut-off valve attached between the opening of the suction pump 2. As shown, the shut-off valve 10 a is connected to the flange 7 via a connecting member 11, and the shut-off valve 10 b is connected to the flange 6 via a connecting member 12. Various materials can be appropriately used as the connecting member, but a steel wire having appropriate rigidity is preferable. As shown in FIG. 1, the shutoff valves 10a and 10b
May be used and only the shutoff valve 10a or the shutoff valve 10b may be used as necessary. FIG. 2 shows the structure of the shut-off valve 10a. The shut-off valve 10b has the same structure as the shut-off valve 10a, and is not shown.

As shown in FIG. 1, the shutoff valve 10 has a thin annular valve seat 13, and a shaft 15 is disposed in an annular space of the valve seat 13 so as to extend in a radial direction of the annular space. ing. A valve body 14 capable of closing or opening the annular space is fixed to the shaft 15. In the embodiment shown in the figure, the valve body 14 has a rotational symmetry about the shaft 15.
It is a piece of wing.

On the other hand, both ends of the shaft 15 project through the valve seat 13 to the outside, and one end of a cam member 16 is fixed thereto. A spring (not shown) is attached to the shaft 15 and is set so as to urge the valve body 14 in the direction of arrow a. Accordingly, a force for rotating the cam member 16 in the direction of arrow a is applied to the valve body 14 as well.

At a predetermined position on the outer peripheral surface of the valve seat 13, a pin mounting hole having a predetermined depth is formed on the outer peripheral surface. A pin 17 longer than at least the depth of the pin mounting hole is inserted into the pin mounting hole, so that the pin 17 projects from the outer peripheral surface of the valve seat 13 by a predetermined length.

In this embodiment, as shown in FIG. 2, the end of a cam member 16 fixed to a shaft 15 rotating in the direction of arrow a by the action of the above-mentioned spring (not shown) is engaged with a pin 17. Stopped and fixed.

One end of the connecting member 11 is connected to the pin 17, and the other end is connected to the flange 7 of the flexible pipe 5.
Is linked to The same applies to the shut-off valve 10b.

The operation of the shut-off valve according to the present invention will be described below.

FIGS. 3 and 4 are conceptual diagrams showing the operating state of the shut-off valve 10a. When the weighing machine 1 shown in FIG. 1 is tilted or falls due to an unexpected accident, an impact such as an earthquake,
By moving the relative position of the flange 7 of the suction pump 2 of the weighing machine 1 with respect to the shutoff valve 10a, the connecting member 11 is pulled in the direction of arrow b in FIG. 3 or pressed in the direction of arrow c shown in FIG. You. Since the pin 17 is inserted and fixed in the pin mounting hole of the valve seat 13, it is possible to withstand a slight pulling or pressing of the connecting member 11, so that the pin 17 locks and fixes the cam member 16. It can be maintained as it is.

However, due to a large impact, the shutoff valve 1
When the relative position of the flange 0a and the flange 7 moves beyond the allowable range, the pin 17 is disengaged from the pin mounting hole or broken to open the cam member 16. As a result, the cam member 16 rotates in the direction of the arrow a around the shaft 15, and the valve body 14 rotates in the same direction with the rotation, whereby the valve body 14 closes the annular space in the valve seat 13. In addition,
Similarly, with respect to the shutoff valve 10b, the annular space in the valve seat is similarly closed by increasing the difference in the relative position between the pin and the flange 6. Therefore, even if the weighing machine 1 tilts or falls, fuel oil or gas flows out from between the suction pipe 3 and the flexible pipe 5 or between the flexible pipe 5 and the suction pump 2 shown in FIG. There is nothing.

Further, unless a certain amount of pulling force or pressing force is applied, the pin 17 does not come off or break from the pin mounting hole. The main body 14 does not rotate to close the annular space in the valve seat 13.

[0025]

According to the present invention, the fuel oil conveying pipe is closed only when the load exceeds a predetermined amount, so that the shut-off valve does not operate with a small load less than the predetermined amount.

That is, in the present invention, specifically, the allowable amount of load is adjusted by adjusting the mounting state of the fixing member such as a pin, and even if a load less than the allowable amount is applied to the shut-off valve, Is adjusted not to operate. Then, the shut-off valve system is designed so that the connecting body is not directly connected to the rotating member such as the lock stay, but is connected to the fixing member that locks the valve body. Therefore, the shut-off valve does not react excessively to the pulling force or pressing force from the connector, and it is possible to prevent the shut-off valve from malfunctioning even if it accidentally comes into contact with the wire during maintenance or the like. Can be. Also, when setting the shut-off valve locally,
Since there is no need to engage the lock stay with the cam or adjust the length of the wire, installation work can be easily performed.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of a shut-off valve of the present invention.

FIG. 2 is a view showing a detailed structure of a shutoff valve in the embodiment shown in FIG.

FIG. 3 is a view showing an operation mode of the valve drive mechanism shown in FIG. 2;

FIG. 4 is a view showing an operation mode of the valve drive mechanism shown in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Measuring machine 2 Suction pump 3 Suction pipe 4 Pit 5 Flexible pipe 6, 7, 8, 9 Flange 10a 1st shut-off valve 10b 2nd shut-off valve 11, 12 Connecting material 13 Valve seat 14 Valve body 15 Shaft 16 Cam member 17 pin

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B67D 5/32 F16K 1/22 F16K 17/36 B60S 5/02

Claims (4)

(57) [Claims] 1. A weighing machine provided at a weighing machine side and / or a suction pipe side of a connecting pipe connecting a suction pipe for sucking fuel oil from an underground tank and a weighing machine,
Load is applied in a predetermined amount or more by the tilt or overturn
A shut-off valve having a rotatable valve body that operates to close at the time . 2. A closing operation of the valve body is locked to the valve body.
It was is provided with a fixing member, inclined the fixing material of the weighing machine
Or shut-off valve of 請 Motomeko 1, wherein you open the locking of the valve body when a load is applied by the fall. 3. A solid Jozai is, absorption引管or shut-off valve according to 請 Motomeko 2 that are connected by a connecting member to the total amount machine. 4. A solid Jozai is shut-off valve according to <br/> claim 3 which is formed by a pin breakage or movable predetermined length by load weight from consolidated material.