JPS6258997B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refueling device equipped with a safety device.

If a car is accidentally started while being refueled using the nozzle at the end of the refueling hose of a ground-mounted refueling system, the refueling hose will be torn off and oil will be sprayed, creating a dangerous situation. To prevent this, a device equipped with a shutoff valve between the refueling hose and the refueling nozzle is used, but since the valve mechanism is inserted near the refueling nozzle, the entire refueling nozzle becomes heavy and is inconvenient to handle. Moreover, when oil passes through this valve mechanism in the axial direction, a pressure loss occurs in the oil, which has the disadvantage of significantly reducing the oil supply speed.

Furthermore, in the conventional configuration, when the refueling nozzle is pulled in the axial direction with respect to the refueling hose, the valve mechanism closes. If the hose is pulled out or torn off from the main body of the refueling machine due to force, it will not be possible to prevent the oil from spewing out.

The present invention has been proposed in view of the above points, and includes a curved pipe provided at the oil outlet portion from the main body of the oil supply device.
A valve standby chamber extending in a direction substantially opposite to the oil flow direction in the secondary flow path is provided on the side near the transition bend from the next flow path to the secondary flow path, and A valve seat is formed in the secondary flow path of the pipe, a valve body and a spring for urging the valve body toward the valve seat are provided in the valve standby chamber, and the curved pipe is attached to the valve body. A base end of a valve stem extending in the secondary flow path of the curved pipe is fixed, a circumferential weakened portion is provided in the circumferential wall of the conduit at the secondary end of the curved pipe, and the weakened portion is provided in the curved pipe. A holding member that allows oil to flow in the curved pipe is fixed to the secondary end side of the curved pipe, and the tip of this holding member is normally in contact with the free tip of the valve rod, and the valve is moved through the valve stem. The body is pushed into the valve standby chamber against the repulsive force of the spring to maintain the flow path in the curved pipe in an open state.

Under normal conditions, the valve body is in the valve standby chamber, so there is no problem with refueling. When the refueling hose is pulled and a larger lateral force is applied to the bent pipe than the weak part can withstand, the bent pipe bends or breaks at the weak part, and the holding member is displaced and separated from the tip of the valve stem. Therefore, the valve body is pushed out from the valve standby chamber to the channel in the curved pipe by the repulsive force of the spring, contacts the valve seat, and closes the channel in the curved pipe.

The illustrated embodiment will be described below.

In Figure 1, 1 is a ground-mounted refueling device;
3 is the main body of the oil supply device, 3 is a curved pipe provided at the outlet of oil from the main body 2 of the oil supply device, 4 is a fuel hose connected to the secondary side of the curved pipe 3, and 5 is a fuel supply at the tip of the fuel hose 4. The nozzle 6 is a helical spring that reinforces the refueling hose.

As shown in FIG. 2, the bent pipe 3 is connected to the oil supply device body 2
It consists of a horizontal part 3A that projects horizontally from an oil feed pipe (not shown) inside, and a vertical part 3B that is orthogonally connected to this horizontal part.

The oil flows from the above-mentioned oil supply pipe in the oil supply device main body 2 through the primary flow path F1 in the horizontal part _3A of the bent pipe, is bent upward at right angles to the flow direction, and flows into the secondary flow in the upper half of the vertical part 3B. A valve standby chamber 7 is configured that communicates with the passage _F2 and extends in a direction opposite to the oil flow direction X in the secondary flow passage.

8 is a cylindrical valve body housed in the valve standby chamber 7;
9 is a spring that urges the valve body 8 upward; 9 is a valve rod that is fixed to the valve body 8 and extends upward along the axis within the secondary flow path _F2 of the curved pipe 3; 10 is a vertical axis of the curved pipe Part 3
A rotary tube connected to the upper half of B has a valve seat 10A formed at its lower end, and its upper end projects upward from the upper end of the vertical bent tube section 3B. Reference numeral 10B denotes an annular groove bored on the outer periphery of the rotary tube 10, into which the locking member (screw) 11 is inserted and engaged from the outer surface of the vertical portion 3B of the curved tube in the radial direction, thereby locking the rotary tube 10 in the axial direction. This prevents separation and allows rotation around its axis.

10C is a radial support arm 10 inside the rotary tube 10.
A presser rod is extended and supported by D in the axial direction of the flow path _F2 , and the upper end (free tip) of the valve rod 9 is attached to the lower end of the presser rod.
are in contact with each other, and the valve body 8 is held in the waiting chamber 7 against the repulsive force of the spring S. In this state, from the primary flow path F1 in the horizontal part 3A of the curved pipe 3 connected to the oil feed pipe in the oil supply device main body 2, to the secondary flow path in the vertical part _3B .
The oil flow path leading to the oil supply hose 4 via _F2 is open.

12 is a hose connection fitting screwed onto the outer end of the rotary tube, to which the hose 4 is connected.

10E is a ring-shaped groove carved radially inward from the outer periphery of the rotary tube 10, and by removing material from this groove portion, a weakened portion 10F is formed in the rotary tube 10. This weakened portion 10F occurs when the hose 4 is displaced beyond a predetermined degree in the transverse direction with respect to the axial direction (that is, when the portion of the hose 4 near the connection with the connecting fitting 12 is displaced beyond a predetermined degree). When the valve body 8 is bent or curved, it forms part of a mechanism that detects this displacement (curvature or bending) and closes the valve body 8. That is, the weak part 10
When F is subjected to more force than it can withstand due to the displacement (curving or bending) of the hose 4 as described above, it will break as shown in Fig. 3, and the valve stem 9 will lose its hold by the contact rod 10C. The valve body 8 is then pressed against the valve seat 10A by the repulsive force of the spring S, thereby closing the flow path.

Note that 8A is a small hole drilled in the peripheral wall of the valve body 8, which allows oil to flow into the valve standby chamber 7 when the valve body closes (raises) the valve body, thereby allowing the valve body 8 to move upward quickly and smoothly. It was created to make people do it.

In order to return the valve body 8 to the flow path open position (FIG. 2), it is sufficient to remove the broken rotary tube 10 and replace it with a new one.

As described above, according to the present invention, since the valve mechanism does not obstruct the flow of oil, no pressure loss occurs, and the refueling nozzle does not become heavy, making it easy to operate. It can function effectively even when the device is abnormally displaced.

Note that the specific shape of the curved pipe 3 is not limited to that shown in the drawings. For example, the flow paths F ₁ and F ₂ may not be orthogonal to each other, and the secondary flow path F ₂ and the waiting chamber 7 may be arranged upside down.

[Brief explanation of the drawing]

FIG. 1 is an external view of an embodiment of the present invention, FIG. 2 is an enlarged sectional view of a curved tube, and FIG. 3 is a sectional view of the rotary tube in a broken state. 3... Bent pipe, 8... Valve body, 9... Valve stem, 10...
... Rotating pipe, 10A... Valve seat, 10F... Weak part of rotating pipe.

Claims (1)

[Claims] 1. A bent pipe is provided at the outlet of the metered oil from the main body of the device to change the flow direction of the oil, and the oil is supplied through a nozzle at the end of the oil supply hose connected to the secondary end of the bent pipe. In the device, the curved pipe extends laterally near a transition bend from the primary flow path to the secondary flow path in a direction substantially opposite to the flow direction of oil in the secondary flow path. A valve standby chamber is provided, a valve seat is formed in the secondary flow path of the bent pipe, and a valve body and a spring that biases the valve body toward the valve seat are provided in the valve standby chamber. , a proximal end of a valve stem extending within the secondary flow path of the curved pipe is fixed to the valve body, and a weakened portion in the circumferential direction is provided on the peripheral wall of the pipeline at the secondary end of the curved pipe. , a holding member that allows the flow of oil in the bent pipe is fixed within the bent pipe on the secondary side end side of the weakened portion, and the tip of this holding member is normally brought into contact with the free tip of the valve rod. The oil supply device is characterized in that the valve body is pushed into the valve standby chamber via the valve stem against the repulsive force of the spring to maintain the channel in the curved pipe in an open state.