JPS6111398A - Detector for trouble of 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 [Technical field to which the invention pertains] The present invention relates to a device for detecting a failure in a refueling system installed at a gasoline refueling station.

[Prior art and its problems]

There are two types of such refueling systems: ground-fixed type, in which the equipment is housed in a case that stands on the ground, and hose-suspended type, in which the refueling hose is suspended from the canopy via a hose storage device. Because they require long upright piping, they are easily damaged by shocks such as earthquakes, and a large amount of oil leaks out of the piping when they are damaged.

Therefore, it is possible to detect the presence or absence of damage by detecting the pressure inside the pipe, but since a long refueling hose that can be rolled up is connected to the pipe, it is possible to determine whether the pipe itself is damaged or the refueling hose part is damaged. could not be easily known.

[Purpose of the invention]

The purpose of the present invention is to eliminate the disadvantages of the conventional example, and when detecting damage based on pressure changes, quickly determine whether the damage is in the pipe inner body or the refueling hose using a single pressure detector. An object of the present invention is to provide a simple and inexpensive failure detection device for a refueling device that can handle repairs.

[Key points of the invention]

However, according to the present invention, the purpose of the lever is to close the valve near the connection of the refueling hose and drive the pump motor when the internal pressure of the pipe becomes low when the pipe is not being refueled, causing damage to the pipe if the internal pressure becomes lower than the specified value. This is achieved by determining that the refueling hose is damaged if it does not drop, and notifying you of this.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a longitudinal sectional side view of a fuel supply system equipped with a failure detection device of the present invention, and FIG. 2 is a flowchart showing the same operation.

The refueling system is of a hose suspension type, and as is well known, two refueling pipes 1 communicating with an underground tank (not shown) are raised and horizontally extended along a wall 2 to a canopy 3. A refueling pump 4 and a flowmeter 5 are attached to the middle of the flowmeter, a motor 6 is connected to the refueling pump 4, and a flow rate pulse transmitter 7 is attached to the flowmeter 5. These equipment such as the oil supply pump 4 are arranged in a place called a machine room 16.

On the other hand, a hose storage device 11 containing a nozzle position detector IO consisting of a hose reel 8, a motor 9 for rotationally driving the hose reel 8, and a cam switch linked to the hose reel 8 is suspended from the canopy 3, and the hose storage device 11 is suspended from the canopy 3. A refueling hose 12 is connected to the end of the refueling hose 12, and the refueling hose 12 is wound around a hose reel 8, and its tip is suspended from a hose storage device 11. A refueling nozzle 14 is attached to the tip of the refueling hose 12, and a hose lowering switch 13a and a rising switch 13b are provided near the refueling nozzle 14. Further, on the second wall, a refueling amount indicator 15 was attached to display the amount of refueling based on the flow rate signal from the pulse transmitter 7 of the flow meter 5.

In such a hose suspension type refueling device, a pressure detector 17 was provided on the outflow side of the refueling pump 4 in the middle of the piping 1, and a valve 18 was installed near the connection part of the piping 1 with the refueling hose 12. This valve 18 is closed when the pressure inside the pipe 1 decreases after refueling is completed. Additionally, an alarm 19 for detecting a failure using a buzzer or the like is installed on the wall 2 or the like.

Next, to explain the operation, in order to refuel a car, press the hose lowering switch 13a, the motor 9 will rotate the hose reel 8 in the forward direction, the refueling hose 12 will be paid out, the refueling nozzle 14 will be lowered, and the refueling nozzle 14 will be lowered near the ground. When reaching the refueling area, the motor 9, hose reel B, etc. are stopped by the output of the nozzle position detector 10, and the nozzle 14 is also stopped.At the same time, the refueling amount indicator 15 is returned to zero by the output of the nozzle position detector 10. The mokuro is driven and the pump 4 rotates to supply oil.

It becomes possible.

Refueling is performed by inserting the refueling nozzle 14 into the refueling port of the automobile and opening it, and the refueling amount measured by the flow meter 5 is displayed on the refueling amount display meter 15 via the pulse transmitter 7.

In this way, refueling is completed, and the hose rise switch 13
, b is pressed and a hose winding signal is issued, the motor 9 and bow reel 8 are reversed, the hose 12 is wound on the reel 8, the nozzle 14 is raised, and the nozzle 14 is raised by the output of the nozzle position detector 1o. stops at the refueling standby position.

Then, as shown in Fig. 2, when the hose hoisting signal is issued (Step I), timing is started (Step Inlet), and a certain period of time, for example, 5 minutes (Step 1, or for the next refueling) is started. Until the hose descends (step),
Read the pressure from the pressure sensor 17. And in the meantime, piping 1
The pressure inside is a constant value, for example 0. When it becomes less than a little kg/cm2 (Step C), the alarm 19 is activated to notify the oil leak, the valve 18 is closed, and the motor 6 and oil supply pump 4 are driven for about 1 second to raise the internal pressure of the pipe 1. and the time measurement starts again (Step 2). Then, read the pressure of the pressure detector 17 again for a certain period of time, for example, 5 minutes, and if it becomes less than a certain value (0.5 kg/cm2) during that period (Step H)
, it is determined that the pipe 1 is damaged and oil is leaking out, and the alarm 19 notifies the pipe damage (go to step).

On the other hand, even after 5 minutes have passed, the pressure sensor 17 still detects 0.5.
If it remains above kg/cm2 (STEPTO), it is assumed that the refueling hose 12 is damaged and the alarm 19 notifies it (STEPTO). Note that the reason for providing this 5 minute time is to exclude normal pressure drops caused by temperature changes etc. from the detection target.

At the first pressure detection stage, the pressure inside pipe 1 is 0.5 kg.
/cm2 or more continues for 5 minutes or more (STERAPRI), it is assumed that there is no damage or oil leakage anywhere, and the failure detection work is terminated. This detection work is performed every time during non-refueling time after refueling, and the refueling operation is started in the middle and the hose lowering switch 13a is activated.
When is pressed and the hose lowering signal is issued (Sutesopnu), the process ends.

〔Effect of the invention〕

As described above, the failure detection device for a refueling device of the present invention has the following features:
When detecting damage based on pressure changes by a pressure detector, even in a hose-suspended refueling system where a long refueling hose is connected to a long pipe, a single pressure detector can detect damage to either the pipe or the hose. This makes it possible to appropriately judge whether or not the problem has occurred, and to quickly repair the problem. Furthermore, since only one pressure sensor and a valve are required as constituent elements, it can be implemented easily and at low cost.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of a fuel supply system equipped with a failure detection device of the present invention, and FIG. 2 is a small flowchart showing the same operation. 1... Punch oil pipe 2... Wall 3... Canopy 4... Oil supply pump 5...
Flow meter 6...Motor 7...Flow rate pulse transmitter 8...Hose reel 9...Motor 10...Nozzle position detector 11...Hose storage device 12...Refueling hose 13
a...Hose lowering switch 13b...Hose rising switch 14...Refueling nozzle 15...Refueling amount indicator 1
6... Machine room 17... Pressure detector 18.
... Valve 19 ... Alarm device applicant
Tokyo Tatsuno Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] When the internal pressure in the pipe becomes low when not refueling, the valve near the connection of the refueling hose is closed and the pump motor is driven.If the internal pressure in the pipe becomes lower than the specified value, it is determined that the pipe is damaged, and if it does not become lower, it is determined that the refueling hose is damaged. A failure detection device for a refueling system, characterized in that the failure detection device is characterized in that the failure detection device is characterized in that the failure detection device is characterized in that the failure detection device is characterized in that the failure detection device