JPS60110698A - Lubricating device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refueling device for supplying fuel oil to automobiles at a refueling station or the like.

Traditionally, refueling vehicles have inserted the nozzle into the refueling tank.
! ! Accidents have occurred in which the nozzle or hose breaks off when the knee starts to move, and the oil continues to be supplied and oil continues to be discharged.In these cases, the sprayed oil often ignites and causes a fire.

The present application provides a safe refueling device that immediately stops refueling when such a nozzle or hose breaks, and an illustrated example will be described below.

(1) is the housing of the oil supply system, the pump (2), fi
A meter (3) is connected by a pipe (4), and further downstream there is a nozzle equipped with a hose (5) and a manual on-off valve.
(6) is connected.

(7) is the motor that rotates the bon two (2), (8)
is a pulse transmitter that outputs one pulse every time the flow meter (3) measures a unit oil amount ('/10001), (9) is an indicator that displays the amount of oil supplied, and aO is the nozzle (when not refueled). 6
) is stored in the nozzle case, αη is the nozzle case α
q is a nozzle detection switch that outputs a signal corresponding to whether or not the nozzle (6) is engaged, (2) is a setting switch to be described later, α is a control unit, a counting circuit 0→, a memory circuit α0. A comparison circuit 01 and a motor control circuit 0η are housed.

First, when the nozzle (6) is removed from the case acj, the output signal a of the switch αυ changes from L (low level) to H (high level), and the motor (7) rotates at full speed via the motor control circuit (Lη). Let's make it stronger.This is the shipponbu (2)
pumps out oil in a tank (not shown) and sends it to a flow meter (3). Further, the clock circuit Oa returns to zero, and the display shows a zero value instead of the refueling amount value related to the previous refueling.

Next, connect the nozzle tip (6F) to the fuel filler port (ry!+) of the car.
When the lever (6) is inserted into the cylinder (not shown) and pulled, the nozzle built-in valve (not shown) opens and oil is discharged from the cylinder tip (6).

This oil is measured by a flow meter (3), and a flow pulse b is sent from a transmitter (8) every time the flow meter (3) measures a unit amount of oil.
Each item is output. The counting circuit a< counts this pulse b and displays the counted value on the display (9) as the amount of oil to be supplied.

When refueling is completed and the nozzle (6) is returned to the case OQ, the output signal a of the switch Qυ changes from H to L, and in response to this, the motor (7) is deenergized via the motor control circuit θη.

The above is the normal refueling work condition, but the lever (6) of the nozzle (6) is operated so that its built-in valve reaches the maximum discharge flow rate Q, and the state of pulse b at this time is Memory circuit 0 by pressing switch Q'';4
Let me remember Tahe.

Figure 3 shows the state of pulse b at the maximum discharge flow rate Q with time T on the horizontal axis and voltage on the vertical axis, and time t corresponding to the rising interval Y of pulse b. The data will be stored in one memory circuit θ.

On the other hand, the nozzle (6) has a complicated internal flow path, resulting in large pressure loss, and the maximum discharge flow rate Q is limited to the nozzle (6) or hose (5).
) It is determined by the pressure loss due to other equipment inserted into the pipe. In other words, the pump (2) itself has a discharge capacity that exceeds the maximum discharge flow rate Qf discharged from the nozzle (6), and when the nozzle (6) is removed from the hose (5), for example, the pipe The flow velocity of channel (4) is the same as that of nozzle (6).
The flow rate will exceed the flow rate at the time of installation.

In other words, if the car starts moving during refueling and an accident occurs in which the nozzle (6) or hose (5) is torn off, the metering speed of the flowmeter (3) will increase and the interval between the rises of the pulse b will become The interval Y in FIG. 3 also becomes shorter. The comparator circuit a always compares and monitors the rising interval of the pulse b with respect to the interval Y, and in case the above situation is detected,
Signal C is output to act on the motor control circuit Q"?) to cut off the energization of the motor. Signal C returns the nozzle (6) to case α0 and the signal a output from switch Op changes from H to L. continues to be output.

In this example, the pulse rise interval was used as the determination target, but the determination can also be based on the number of pulses input within a certain period of time. It is also possible to insert a solenoid valve or the like into the pipe to close the pipe.

With the configuration as described in detail above, even if the nozzle or hose is torn off during refueling, refueling is immediately stopped, and a major accident due to oil being sprayed can be prevented.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of the oil supply device, FIG. 2 is a block diagram of the control section, and FIG. 3 is a diagram showing the waveform of a pulse signal. (2)...Pump (3)...Flowmeter (6)...
・Nozzle (8)...Transmitter (9)...Indicator 0
3...Control unit patent applicant Tominaga Seisakusho Co., Ltd.

Claims (1)

[Claims] Oil pump, flow meter, hose, nozzle (i) In a device that is connected in sequence and discharges oil from the nozzle, the maximum discharge flow rate of oil discharged from the nozzle is memorized, and this maximum A refueling device characterized in that the refueling device is configured to stop refueling when a flow meter measures a flow velocity exceeding a discharge flow velocity.