JPH0199997A - Oil feeder - Google Patents

Abstract

PURPOSE: To accurately detect the oil leakage by preventing the increase of volume caused by the unfastening of an oil supply hose, by detecting the oil leakage during the time when an oil supply nozzle is stopped at a ceiling position or an intermediate position. CONSTITUTION: For example, when an oil supply nozzle 9 is lowered to an intermediate position B, the rotation of a reel motor 8 is stopped by the operation of a controller 15 on the basis of a detection signal from a nozzle position detector 10, and a pump motor 11 starts its rotation simultaneously with the stop of the oil supply nozzle 9 at the intermediate position B. It is not judged as the oil leakage even when the flow of oil is detected during the time T1 after the start of the rotation of the pump motor 11 because it is judged that it is caused by the pump pressure, but when the oil flow exists in an oil supply pipe 1 after the passage of the time T1 , and a pulse signal is transmitted from a flow pulse transmitter 21, this pulse signal is transmitted to the controller 15, and the pulse number is counted. When the pulse number (n) becomes N, the generation of the oil leakage is judged, so that the judgement is output to an alarm 14 from the controller 15 to inform the generation of the oil leakage, and the oil supply device is simultaneously stopped. The oil leakage position is searched to be repaired.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a refueling device installed at a refueling station for refueling automobiles and the like with gasoline and the like.

[Conventional technology]

There are two types of refueling equipment: those that are fixed on the ground and those that are suspended.As shown in Figure 1, the suspended type refueling system connects the refueling pipe 1 that connects to an underground tank (not shown) to the office. A canopy 4 is set up along the wall 3 of a building 2, etc., and is connected to a refueling hose 7 which is wound around a take-up reel 6 within a case 5 of a hose processing device suspended from the canopy 4. A reel motor 8 is connected to the take-up reel 6, and a nozzle position detector 10 for detecting the position of the oil supply nozzle 9 provided at the tip of the oil supply hose 7 is connected to the take-up reel 6.

There are three stopping positions for the refueling nozzle 9: the highest ceiling position A, an intermediate position B below it, and the lowest refueling position C, so that the refueling nozzle 9 does not get in the way when the store is closed or when a large truck is running. To prevent this, the refueling nozzle 9 is located at the highest ceiling position A, which is closest to the canopy 4, and when the store is not refueling while the store is open, it is on standby in preparation for refueling, and is placed at an intermediate position B at a height that does not interfere with cars or people. Furthermore, when refueling an automobile, the refueling nozzle 9 is positioned at the lowest refueling position C.

In the figure, reference numeral 11 indicates a pump motor that drives a pump 22 provided in the middle of the oil supply pipe 1, 12 indicates a flow meter having a flow rate pulse transmitter 21, and 13 indicates a display provided on the wall of the building 2 or the like.

In this way, to refuel a car, the refueling nozzle 9 is lowered from intermediate position B to refueling position C.
By this lowering, the pump motor 11 is turned on, and by opening the nozzle valve of the refueling nozzle 9, refueling can be started immediately.

By the way, in a suspended type refueling system having such a configuration, the refueling pipe 1 is arranged long along the building 2 or the canopy 4 as described above, so if a leak occurs at this piping location, it is difficult to notice, and as a result, , there is a high risk that leaks will not be detected late and dangers such as fire may occur.

As a means to prevent such danger from occurring, the applicant previously proposed a refueling system in Japanese Patent Application No. 62-202668, which is equipped with a detection means for detecting oil leakage while the nozzle is lowered from the ceiling position to an intermediate position. proposed a device. This is done by checking for oil leakage while the refueling nozzle descends from the ceiling position to an intermediate position, which is out of reach of humans, and detects oil leakage due to malfunction caused by erroneously pulling the valve opening lever of the refueling nozzle. This is to prevent being judged.

[Problem that the invention seeks to solve]

In this method of detecting oil leakage while the refueling nozzle is descending, oil leakage is detected while the refueling nozzle is descending, that is, while the refueling hose is descending, and during this time, the refueling hose is inside the upper hose processing device. Since it is unwound from the state where it is wound on the take-up reel, it is unwound from the state where it is wound and pressed on the take-up reel and the pressure is released. As a result, the internal volume of the hose increases.

If oil flows through the oil supply hose as the volume of the oil supply hose increases, it will be determined that there is an oil leak, and there is a risk that residual oil will not be detected accurately.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the disadvantages of the conventional example, and to provide an oil supply device that can accurately detect remaining oil without increasing volume due to unraveling of the oil supply hose when detecting oil leakage.

[Means for solving problems]

In order to achieve the above object, the present invention provides a refueling device in which the refueling nozzle at the end of the refueling hose suspended from the ceiling has three stop positions: ceiling, intermediate, and upper and lower refueling stages, in which leakage occurs while the refueling nozzle is stopped. The gist is that an oil leak detection means for detecting oil is provided.

[Effect]

According to the present invention, residual oil is detected while the refueling nozzle is stopped at either the ceiling position or the intermediate position, but in this stopped position, there is no increase in volume due to the refueling hose being paid out from the take-up reel. Therefore, oil will not flow due to the bulge in the hose and it will not be mistakenly determined that there is an oil leak.

〔Example〕

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

- FIG. 1 is an explanatory diagram showing an embodiment of the oil supply system of the present invention. Since the basic configuration of the suspended type oil supply system shown here has already been explained, detailed explanation will be omitted here.

Also in the suspended type refueling device of the present invention, the refueling nozzle 9 is located at the ceiling position A.
, intermediate position B, and refueling position C. Switch SW1 for moving refueling nozzle 9 between ceiling position A and intermediate position B is placed near the wall of building 2. Further, a switch SW2 for moving the refueling nozzle 9 between the intermediate position B and the refueling position C is provided near the refueling nozzle 9, respectively.

In the figure, reference numeral 14 indicates a sound or light alarm when oil leakage is detected, and it is installed at a conspicuous location such as the case of the display 13.

In addition, 15 in the figure is a control device using a computer installed in the building 2, etc. As shown in the block diagram of FIG.
Central processing unit (CPU) 17, storage device (RAM) 1B
, a storage device (ROM) 19, and a clock circuit 20. Then, the control device 15 is connected to a switch S.
The output signals from W 1 and S W 2, the detection signal from the nozzle position detector IO, and the pulse signal from the flow rate pulse transmitter 21 are introduced, and the control signal from the control device 15 is transmitted to the annunciator 14, the display 13, They were introduced into the reel motor 8 and pump motor 11, respectively.

Next, the operation of residual oil detection will be explained with reference to the flowcharts of FIGS. 3, 4, and 5.

First, to explain the case where residual oil is detected while the refueling nozzle 9 is stopped at the ceiling position with reference to FIG. It is located at ceiling position A, which is the highest position closest to .

When the switch SW1 is pressed in this state (step switch), the nozzle position detector 10 detects that the current position of the refueling nozzle 9 is at the ceiling position A (step port), and based on the detection signal from this, the control device 15 causes the pump motor 11 to rotate (Step C).

By the way, the oil in the refueling hose 7 and the refueling pipe 1 is often cooled and contracted during the night before the store opens, and the pressure inside the refueling hose 7 and the refueling pipe 1 is lower than the pump pressure.
The time Tr (for example, about 1 second) after the start of rotation (step 2) is required to increase the pressure in the oil supply hose 7 and the oil supply pipe 1 to the pump pressure. Therefore, even if oil flow is detected during this time T1, this is not determined to be residual oil.

If the oil still flows in the oil supply pipe 1 after time T1 (1 second) has elapsed and a pulse signal is being emitted from the flow rate pulse transmitter 21 (step H), this pulse signal is sent to the control device 15.
The pulse number n is counted (to step).

The number of pulses n is N1. For example, if one pulse is 10cc, N
= 3, that is, when 30cc flows (stepped), it is determined that oil has leaked, and the control device 15 outputs an output to the alarm 14 to notify the presence of residual oil with light and sound, and at the same time controls the oil supply device. Stop functioning as an incompetent person (stepchi). Therefore, locate the oil leak and carry out repair work.

By the way, the number n of pulses measured after the pump motor 11 starts rotating (Step C) and after time T1 (1 second) has elapsed (Step 2) becomes N( N=3) or less (Step Ho, Go, Tri)
, or zero (step ho.

In this case, it is determined that there is no leakage, and the pump motor 11 is turned off, the reel motor 8 is turned on, and the take-up reel 6 rotates normally. When the refueling hose 7 wound here is unwound and the refueling nozzle 9 is lowered to the intermediate position B (stellar pull), the reel motor 8 stops rotating based on the detection signal from the nozzle position detector 10. step port), the refueling nozzle 9 stops at this intermediate position and prepares for refueling.

In this way, the oil supply nozzle 9 is at the ceiling position A, and residual oil is detected while the reel motor 8 is stopped.

Next, in order to move the refueling nozzle 9, which is located at the refueling standby position (intermediate position B) as described above, to the ceiling position A for closing time or for entering or exiting a large truck, press the switch SW1. Nozzle position detector I
O detects that the current position of the refueling nozzle 9 is not at the ceiling position A (step port), and based on the detection signal from there, the controller 5 outputs an output to the reel motor 8, which reverses the rotation (step port).

As a result, the take-up reel 6 is reversed, the refueling hose 7 is wound around it, and the refueling nozzle 9 is raised.

When the refueling nozzle 9 moves to the ceiling position A and this is detected (step force), the reel motor 8 stops (step port), and the refueling nozzle 9 stops at the ceiling position A.

Therefore, the refueling nozzle 9 is located at a high place and cannot be reached, so it is not tampered with when the store is closed at night, and when a large truck leaves the vehicle, the refueling nozzle 9 is It does not interfere with the running of the vehicle.

Next, the case where residual oil detection is performed while the oil supply nozzle 9 is stopped at intermediate position B will be explained with reference to FIG.
If the switch SW1 is turned on in the same manner as in the previous embodiment, (
Step port), it is detected that the refueling nozzle 9 is at the ceiling position A (Stella Pre), and the reel motor 8 is rotated forward by the action of the control device 15 according to the detection signal from the nozzle position detector IO (step port), and winding is performed. - The wheel 6 rotates, the refueling hose 7 is paid out, and the second refueling nozzle 9 descends.

When the refueling nozzle 9 descends to the intermediate position B (step port), the rotation of the reel motor 8 is stopped by the action of the control device 15 based on the detection signal from the nozzle position detector 10, and the refueling nozzle 9 moves to the intermediate position WB. At the same time as the pump motor 11 stops, the pump motor 11 starts rotating (step).

During this time, that is, while the refueling nozzle 9 descends from the ceiling position A to the intermediate position B, the refueling hose 7 that is being fed out is released from the pressed state in which it was wound around the take-up reel 6.

After the pump motor 11 starts rotating, a time T
Even if oil flow is detected during the time T1 (1 second), this is not determined to be residual oil as it is caused by the pump pressure.
If the flow of oil continues in the oil supply pipe 1 even after 1 second has elapsed (Step Na), and a pulse signal is being emitted from the flow rate pulse transmitter 21 (Step Na), this pulse signal is transmitted to the control device 15. The number of incoming pulses is counted (Stempum)
.

When the number of pulses n reaches N (N=3) (step 2), it is determined that residual oil is generated, and the control device 15 outputs an output to the alarm 14 to notify by light or sound that residual oil is generated, At the same time, the oil supply system becomes uncontrollable and stops functioning (step-by), so the location of the oil leak is searched and repair work is carried out.

By the way, the number n of pulses measured after the pump motor 11 starts rotating (step rotation) and time T1 (1 second) has elapsed increases to N (N) during the time T2 (for example, 3 seconds). = 3) or less (Stepra, Mu, Tsu,))
, or zero (Stepra.

)), in this case, it is determined that there is no leakage and the pump motor 11 is turned off (step).

Note that the timing to turn on the pump motor 11 is not limited to after the refueling nozzle 9 has stopped at the intermediate position B as described above, but the timing to turn on the pump motor 11 is not limited to after the refueling nozzle 9 stops at the intermediate position B. It may be turned on, and in this case, as soon as the oil supply nozzle 9 stops at the intermediate position B, the number of pulses can be counted to check for oil leakage.

Next, in order to reposition the refueling nozzle 9, which has been lowered to the intermediate position B as described above, to the ceiling position A, the reel motor 8 is activated in the same manner as in the flowchart shown in FIG. Turn in the opposite direction and wind up the refueling hose 7 (step O, R, Y).

Next, the operation of moving the refueling nozzle 9 stopped at the intermediate position B to the refueling position C for refueling will be explained with reference to the flowchart in FIG. When SW2 is pressed (step mark), the nozzle position detector 10 detects that the refueling nozzle 9 is currently stopped at intermediate position B (step mark).
, whereby the reel motor 8 is controlled by the output from the control device 15.
rotates in the normal direction (step-off), the refueling hose 7 is further unwound from the take-up reel 6, and the refueling nozzle 9 is lowered.

When it is detected that the refueling nozzle 9 has descended to the refueling position C (Snapco), the rotation of the reel motor 8 stops, the refueling nozzle 9 stops at the refueling position C, and at the same time the display 13 displays The previous lubrication amount is reset, and the pump motor 11 rotates and becomes ready for lubrication (
stepe). Therefore, refueling can be achieved by inserting the refueling nozzle 9 into the refueling port of the automobile and opening the nozzle valve.

Next, to explain the operation of moving the refueling nozzle 9 from the refueling position C to the intermediate position B after refueling is completed, if you press the switch SW2 located near the refueling nozzle 9 (step ma), the nozzle position will be detected. The device 10 detects that the current stop position of the refueling nozzle 9 is not the intermediate position B (Step 1), and as a result, the pump motor 11 stops and at the same time, the reel motor 8 starts reverse rotation (Step 1).

As a result, the refueling hose 7 is wound around the take-up reel 6 and the refueling nozzle 9 rises, and when it is detected that the refueling nozzle 9 has moved to the intermediate position B (step a), the reel motor 8 rotates. (step S), the refueling nozzle 9 stops at intermediate position B.

〔Effect of the invention〕

As described above, the oil supply device of the present invention detects residual oil when the oil supply nozzle is stopped, so the oil supply hose does not unravel during detection and the volume does not increase. It is possible to prevent the oil from being judged as oil, and it is possible to accurately detect the presence or absence of residual oil.

In addition, since such detection is performed when the refueling nozzle is located either on the ceiling or in an intermediate position that is out of reach of humans, there is no risk of accidentally pulling the lever of the refueling nozzle during detection, and an oil leak may be determined due to malfunction. Furthermore, oil is not scattered from a high place, which prevents dangers such as fire outbreaks and ensures safety.

In addition, it takes 2 to 3 seconds after the refueling nozzle descends to the refueling level WC, inserting the tip of the refueling nozzle into the car's refueling tank, opening the nozzle valve, and starting refueling, so any oil leakage can be detected during this time. You may.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of the oil supply device of the present invention, and FIG.
The figure is a block diagram similar to the above, and FIGS. 3, 4, and 5 are flowcharts showing the operation. 1... Fuel supply pipe 2... Building 3... Wall
4...Canopy 5...Hose processing device case 6...Take-up reel 7...Refueling hose 8...
・Reel motor 9... Refueling nozzle 10... Nozzle position detector 11... Pump motor 12... Flow meter 13... Display 14... Alarm
15... Control device 16... Input/output device (
Ilo) 17...Central processing unit (CPU) 18...Storage device (RAM) 19...Storage device (R
OM) 20...Clock circuit 21...Flow rate pulse transmitter 22...Pump A...Ceiling position B...Intermediate position C...
Refueling position

Claims (1)

[Claims] In a refueling system where the refueling nozzle at the end of the refueling hose suspended from the ceiling has three stop positions: ceiling, intermediate, upper and lower refueling, an oil leakage detection means is provided to detect oil leakage while the refueling nozzle is stopped. A refueling device characterized by: