JPH0930600A - Oil supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a work for increasing measuring devices by a method wherein even when a failure occurs in any one of a plurality of measuring devices, such failure can be rapidly detected. SOLUTION: A submergible pump 4 is provided in a tank 4 and an oil feed pipe 5 for feeding oil 3 from the pump 4 is constituted of a cross pipe consisting of a suction pipe 6 and an oil feed pipe 7, and three branch pipes 8A, 8B, 8C are provided, spaced apart from one another, midway in the cross pipe in the longitudinal direction thereof. And the forward ends of the branch pipes 8A, 8B, 8C are connected to measuring devices 10A, 10B, 10C, respectively and the forward end of the pipe 7 is sealed (closed) with a cap 9. And solenoid valves 27A-27C are provided midway in the pipe 7 corresponding to the measuring devices 10A-10C and inclination sensors 29A-29C, as hindrance sensing means, and report lamps 32A-32C are provided on casings 11 of the devices 10A-10C, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supplies oil liquid to a plurality of weighing machines by a single submersible pump (submerged pump) provided in an underground tank of a gas station, for example. Refueling device

[0002]

2. Description of the Related Art Recently, based on deregulation of the Fire Service Act, a refueling device using a submersible pump has been developed in order to effectively use a space in a gas station, to efficiently use a pump by sharing a pump, and to reduce costs. Is being considered.

As an oil supply device according to the prior art of this type, for example, according to Japanese Patent Laid-Open No. 64-58699, an underground tank for storing an oil liquid and a submerged tank for immersing the oil liquid in the underground tank are disclosed. A submersible pump provided in the underground tank, a common pipe having one end extending into the underground tank and connected to the pump, and the other end protruding outside the underground tank, and the other end of the common pipe. A plurality of branch pipes that branch from each other to form an oil liquid delivery pipe together with the common pipe, and a plurality of oil supply nozzles that are respectively connected to the tip ends of the respective branch pipes and that perform an oil supply operation to a vehicle tank A refueling device including a weighing machine is known.

Here, each of the weighing machines is provided with a signal output means for outputting a refueling permission signal when each of the refueling nozzles is in a state of performing a refueling operation. Of the respective signal output means, When the refueling permission signal is output from at least one of the signal output means, by controlling the drive of the pump by the pump drive control means,
The oil liquid in the underground tank can be supplied to each measuring machine from one submersible pump.

Further, a solenoid valve for blocking the oil liquid from the pump from flowing toward each metering device is provided at the proximal end of each branch pipe, and one of the branch pipes is branched. When the pipe is damaged or damaged and the oil liquid leaks, the leak sensor detects it and closes the solenoid valve of the leaked branch pipe to prevent further oil liquid leakage. In addition to blocking, it is possible to continue the refueling work by the weighing machine on the other branch pipe side where no leak has occurred.

[0006]

By the way, in the above-mentioned prior art, one end of the liquid supply pipe for supplying the oil liquid from the pump to each metering machine extends into the underground tank and is connected to the pump, and the other end thereof is connected to the pump. Common piping protruding outside the underground tank,
It is configured by a plurality of branch pipes branched from the other end (protruding end) side of the common pipe, and each weighing machine is connected to the tip side of each branch pipe. When performing the above, it is necessary to further branch and provide another branch pipe on the projecting end side of the common pipe, and there is a problem that the piping work accompanying the additional work of the weighing machine becomes very troublesome.

Further, electromagnetic valves for shutting off the flow of the oil liquid are respectively provided at the base ends of the respective branch pipes, the front ends of the respective branch pipes are connected to the respective weighing machines, and the oil liquid is leaked to the middle portion thereof. Since only a leak sensor for detection is provided, when each branch pipe is formed as a long pipe,
Unless a plurality of leak sensors are provided at regular intervals in the middle of each branch pipe, it is difficult to detect a leak accident of oil liquid with high accuracy, and if the closing control of the solenoid valve by the leak sensors is delayed, the pump There is a problem that a large amount of oil liquid supplied to each measuring machine side leaks to the outside.

Further, the vehicle collides with one of the weighing machines provided at the gas station, and the attitude (inclination) of the weighing machine becomes abnormal. Even if a failure occurs, it is difficult to detect it early, and there is a problem that the oil liquid may leak from the failed weighing machine.

The present invention has been made in view of the above-mentioned problems of the prior art, and the present invention allows the addition of a weighing machine.
It is possible to easily add a measuring machine by extending the tip side of the liquid delivery pipe, and even if a failure occurs on one of the multiple measuring machines, this can be done quickly. It is an object of the present invention to provide an oil supply device capable of reliably preventing leakage of oil liquid by detecting the above.

[0010]

In order to solve the above-mentioned problems, the structure adopted by the invention of claim 1 is an underground tank for storing an oil liquid and an immersion in the oil liquid in the underground tank. A submersible pump provided so that one end side is connected to the pump and the other end side extends outside the underground tank and has a plurality of branch pipe parts in the middle part, and the liquid supply pipe A plurality of weighing machines each provided with a fueling nozzle connected to the tip side of each branch pipe section for performing a fueling operation, and a plurality of signals provided in each weighing machine and outputting a refueling permission signal based on the state of the fueling nozzle Output means, pump drive control means for driving and controlling the pump based on the output of the oil supply permission signal from one of the signal output means, and the pump drive control means provided corresponding to each of the weighing machines. For refueling work with each weighing machine A plurality of fault detecting means for detecting whether or not harm has occurred, and provided in the middle of the liquid sending pipe and between the respective branch pipe parts, respectively, based on a signal from the respective fault detecting means. A plurality of shut-off valves for shutting off the flow of the oil liquid on the upstream side of the weighing machine corresponding to the failure detection means, and the shut-off valves of the weighing machines based on the signals from the respective failure detection means provided corresponding to the respective weighing machines. It comprises a plurality of informing means for informing which of the weighing machines has a fault.

In this case, according to the second aspect of the invention, each of the fault detecting means is constituted by an inclination sensor which is provided for each weighing machine and detects a change in the inclination of each weighing machine.

Further, in the invention according to claim 3, the liquid supply pipe is provided between an inner pipe portion through which the oil liquid from the pump flows and the inner pipe portion surrounding the inner pipe portion from the outside. Is formed as a double pipe consisting of an outer pipe part that defines a space, and each of the failure detection means is provided between the shut-off valves in the middle part of the outer pipe part, and from the inner pipe part. A leak sensor for detecting whether or not the oil liquid is leaking into the space is used.

[0013]

With the above construction, in the invention described in claim 1,
One end side is connected to the pump in the underground tank, the other end side is provided with a plurality of branch pipe parts in the middle part of the liquid transfer pipe extending outside the underground tank, and a weighing machine is connected to the tip end side of each branch pipe part. Therefore, if the other end side of the liquid supply pipe extending outside the underground tank is further extended and a branch pipe part is provided in the middle part, measurement is performed at the tip end side of the branch pipe part. You can easily add machines.

Further, when a trouble occurs in the refueling work by any one of the plurality of measuring machines, it can be surely detected by any one of the trouble detecting means corresponding to the measuring machine and the It is possible to reliably prevent the oil liquid from flowing to the faulty measuring machine side by any of the shutoff valves, and to notify at an early stage which measuring machine side the fault has occurred by the notifying means. .

In this case, as in the second aspect of the invention, an inclination sensor as a failure detecting means is provided for each weighing machine, and the attitude abnormality of the weighing machine is detected from the change in the inclination of each weighing machine. By doing so, even if the vehicle collides with one of the weighing machines and the posture (tilt) of the weighing machine becomes abnormal, and the lubrication work by any of the weighing machines fails, this can be detected early. Therefore, it is possible to reliably prevent the oil liquid from leaking from the inside of the weighing machine in which the failure has occurred.

Further, as in the invention described in claim 3, the liquid supply pipe is formed as a double pipe, and an oil liquid leak detection space is provided between the inner pipe part and the outer pipe part of the liquid supply pipe. If it is defined, whether or not the oil liquid in the inner pipe leaks into the leak detection space by the leak sensor as a failure detection means provided between the shutoff valves in the middle portion of the outer pipe. Can be detected at an early stage, and it is possible to surely prevent further leakage of the oil liquid while accurately determining whether or not any refueling work by any of the weighing machines is in trouble. Then, the refueling work with the usable weighing machine can be appropriately continued.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An oil supply apparatus according to an embodiment of the present invention will be described below with reference to FIGS.

1 to 6 show a first embodiment of the present invention.

In the figure, 1 is a site of a gas station, 2 is an underground tank buried underground in the site 1, and 2 is an underground tank.
An oil liquid 3 such as gasoline is stored therein. Reference numeral 4 denotes a submersible pump provided in the underground tank 2 so as to be immersed in the oil liquid 3 in the underground tank 2. The pump 4 is attached to the lower end side of a pumping pipe 6 described later, The oil liquid 3 in the underground tank 2 is sucked from the strainer 4A serving as a suction port by being rotationally driven by a motor (not shown), and the oil liquid 3 is discharged (supplied) into the liquid supply pipe 5 described later.
Configuration.

Reference numeral 5 denotes a liquid supply pipe for supplying the oil liquid 3 discharged from the pump 4, the lower end side of the liquid supply pipe 5 extending into the underground tank 2 and being connected to the pump 4, and the upper end side being the underground tank 2 The pumping pipe 6 protruding upward to the outside, and the pumping pipe 6
Is connected to the upper end side of the above through a leak prevention valve 28, which will be described later, and is roughly constituted by an oil feeding pipe 7 extending substantially horizontally in the site 1. Further, the oil supply pipe 7 is provided with a space in the longitudinal direction at intervals in the middle thereof, for example, three branch pipe parts 8A, 8B, 8C are provided in a branched manner to form a so-called crossover pipe.

Here, the branch pipe portions 8A, 8B, 8C are branched from the oil feed pipe 7 to which the oil liquid 3 is fed from the pump 4 in the arrow A direction in the arrow A direction, and the tip ends thereof. Are connected to weighing machines 10A, 10B, and 10C described later, respectively. Further, a cap body 9 is fitted on the tip end side of the oil feed pipe 7, and the cap body 9 seals (closes) the tip end side of the oil feed pipe 7.
doing. Then, when an additional construction of the weighing machine is performed, the cap body 9 is removed and the tip end side of the oil feed pipe 7 is further extended by another oil feed pipe (not shown) or the like.

10A, 10B and 10C are the sites 1 of the gas station
With the three weighing machines installed above, the respective weighing machines 10A to 1
0C has almost the same structure, and as shown in FIG. 1 by taking the weighing machine 10A as an example, the casings 11 of the weighing machines 10A to 10C are provided in the casing 11, and one end of the branch pipe portion 8A (8B, Fixed pipe 1 connected to the tip side of 8C)
2 and a flow meter 13 provided in the middle of the fixed pipe 12.
And attached to the flow meter 13, and each weighing machine 10A (10
(B, 10C) and a flow rate pulse transmitter 14 for transmitting a pulse proportional to the amount of oil supply (flow rate).

Further, each weighing machine 10A (10B, 10C)
Is a hose 15 connected to the other end of each fixed pipe 12,
Refueling nozzle 16 provided at the tip of the hose 15, and a nozzle hook 17 for hooking and unhooking the oil nozzle 16
And a nozzle switch 18 which is closed when the refueling nozzle 16 is removed from the nozzle hook 17 and is opened when hooked,
Based on the flow rate from each flow rate pulse transmitter 14, the weighing machine 10
An oil supply control unit 20 as a signal output means is provided in each casing 11 of the weighing machines 10A (10B, 10C).

As shown in FIG. 2, each refueling control unit 20 is composed of, for example, a microcomputer, and the input side thereof is the flow rate pulse transmitter 14, the nozzle switch 18, and an inclination sensor 29A (29B, 2) described later.
9C) and the like, and the output side is connected to the display 19 and a pump drive control circuit 21 described later. And
Each refueling control unit 20 stores the programs and the like shown in FIG. 4 and FIG.
(B, 10C) is used to perform diagnostic control of failure occurrence based on the inclination.

Further, the storage circuit of each refueling control unit 20 stores a counter C or the like in the storage area 20A thereof, and the counter C has a tilt sensor 29A (29B, 29B).
Based on the signal from C), the weighing machine 10A (10B, 10B
Each time the tilt angle θ (see FIG. 3) in C) increases by 1 degree, the step angle is incremented by “1” as shown in FIG.

Further, in addition to the diagnostic control, each refueling control unit 20 resets the previous display value of the display 19 to zero and the pump drive control circuit 21 by closing the nozzle switch 18 at the start of refueling work, for example. 1st function to output refueling permission signal to the flow rate pulse transmitter 1
The second function of counting the pulses from 4 and displaying the amount of refueling on the display 19 and the nozzle switch 1 at the end of refueling work
8 has a third function of stopping the output of the refueling permission signal to the pump drive control circuit 21 when it is opened.

Reference numeral 21 denotes a pump drive control circuit which constitutes the pump drive control means according to this embodiment. As shown in FIG. 2, the pump drive control circuit 21 has an input side for each weighing machine 10A.
10 to 10 C of the refueling control unit 20, and when at least one of the refueling control units 20 outputs a refueling permission signal, the voltage from the power source 22 is supplied to the motor of the pump 4. Then, the pump 4 is rotationally driven, and the power supply to the pump 4 is stopped while the output of the oil supply permission signal from all the oil supply control units 20 is stopped.

Reference numeral 23 denotes a control device provided outside each of the weighing machines 10A to 10C. The control device 23 includes a shutoff control unit 24, a switch 25, a storage circuit (not shown), etc., as shown in FIG. The switch 25 opens and closes between the power source 22 and a solenoid valve 27A (27B, 27C) described later by the switch 25, and supplies and stops the voltage from the power source 22 to these solenoid valves 27A (27B, 27C). It is composed. The switch 25 is provided, for example, in total of three corresponding to the solenoid valves 27A27B and 27C.

Here, the shutoff control section 24 of the control device 23 has an input side of the refueling control unit 2 of each of the weighing machines 10A to 10C.
0 and the like, and the output side is connected to the switch 25 and an AND circuit 26 and the like described later. The control device 23 stores the program and the like shown in FIG. 6 in its memory circuit, and controls the opening / closing of the solenoid valve 27A (27B, 27C) by the shutoff control unit 24.

Reference numeral 26 denotes an AND circuit provided corresponding to each of the weighing machines 10A to 10C. The AND circuit 26 takes a logical product of valve opening / closing signals output from the refueling control unit 20 and the shutoff control unit 24, Both signals are open signals (=
Solenoid valve 27A (27B, 27C) only when 1)
To open the valve. Then, the AND circuit 26
For example, when one of the weighing machines 10A to 10C falls or tilts due to a vehicle collision or the like and its power supply line (not shown) is disconnected, the valve opening / closing signal output from the shutoff control unit 24 is When the valve closing signal (= 0) is reached, the corresponding solenoid valve 27A (27B, 27C) is closed.

Next, 27A, 27B, and 27C correspond to the respective weighing machines 10A to 10C, and the branch pipe portion 8 is provided in the middle of the oil feed pipe 7.
A solenoid valve as a shut-off valve provided between A, 8B, and 8C is shown. Of the solenoid valves 27A, 27B, and 27C, the solenoid valve 27A is a branch pipe portion 8A and a leakage prevention valve as shown in FIG. 28 is disposed in the middle of the oil feed pipe 7, and when the valve is closed, all of the weighing machines 10A, 10B on the downstream side,
The oil liquid 3 from the pump 4 is blocked from flowing toward 10C.

Further, the solenoid valve 27B is provided with branch pipe portions 8A and 8B.
It is located in the middle of the oil feed pipe 7, and when the valve is closed, it blocks the oil liquid 3 from the pump 4 from flowing toward the weighing machines 10B and 10C on the downstream side. The solenoid valve 27C is located between the branch pipe portions 8B and 8C and is disposed in the middle of the oil feed pipe 7. When the valve is closed, the oil liquid 3 from the pump 4 flows toward the downstream weighing machine 10C. To shut off.

28 is a pumping pipe 6 and an oil feeding pipe 7 of the liquid feeding pipe 5.
And a leakage prevention valve disposed between the leakage prevention valve 2 and
Reference numeral 8 is connected to the upper end side of the pumping pipe 6 and automatically closes when the pressure in the pumping pipe 6 falls below a certain set pressure when the pump 4 is stopped. The leak prevention valve 28 drives the pump 4 and opens when the pressure in the pumping pipe 6 exceeds the set pressure, and the oil liquid 3 from the pump 4 flows into the oil feeding pipe 7. Forgive Further, even when the oil liquid 3 leaks in the middle of the pumping pipe 6 and the pressure of the oil liquid becomes equal to or lower than the set pressure, the leakage prevention valve 28 is closed and the oil liquid 3 is directed toward the inside of the oil feeding pipe 7. Three
To prevent the distribution of.

29A, 29B and 29C are weighing machines 10A
10C is a tilt sensor provided in the casing 11 as a failure detection means, and the tilt sensor 29A (29A
B, 29C) is a thread-like suspender 30A as shown in FIG.
Weights 3 suspended downward via (30B, 30C)
It is equipped with 1A (31B, 31C). The tilt sensor 29A (29B, 29C) is, for example, the weighing machine 10
When the A (10B, 10C) is overturned or tilted due to a vehicle collision or the like, the suspenders 30A (30B, 30C) are used.
The configuration is such that a change in the inclination (posture) of the weighing machine 10A (10B, 10C) is detected from the inclination angle θ of C).

Further, reference numerals 32A, 32B and 32C denote notifying lamps as notifying means provided in the casing 11 of the respective weighing machines 10A to 10C, and the notifying lamps 32A (3
2B, 32C) is, for example, a weighing machine 10A (10B, 10C).
C) falls or tilts due to a vehicle collision or the like, and the weighing machine 1
When a trouble occurs in the refueling work by 0A (10B, 10C), the operation is controlled together with the solenoid valve 27A (27B, 27C), and the notification lamp 32A (32B, 32C).
Is turned on, the weighing machine 10A (10B, 1
0C) informs the refueling worker that a failure has occurred in the refueling work.

The notification lamp 32A (32B, 32)
As shown in FIG. 1, C) is a weighing machine 10A (10B, 10B).
It is not always necessary to provide each of the casings 11 of C), and it may be provided at an appropriate position where the refueling operator can easily see it so as to correspond to each weighing machine 10A (10B, 10C).

The refueling device according to the present embodiment has the above-described structure. First, in the case of a normal refueling operation (normal refueling sequence), for example, the weighing machine 10A among the weighing machines 10A to 10C is used. When a refueling operator removes the refueling nozzle 16 from the nozzle hook 17 to refuel, the nozzle switch 18 is closed and the refueling control unit 20 outputs a refueling permission signal to the pump drive control circuit 21.
Then, the pump drive control circuit 21 supplies power to the motor of the pump 4 based on the refueling permission signal, and the pump 4
The oil liquid 3 in the underground tank 2 is discharged into the liquid supply pipe 5 (oil supply pipe 7) by rotationally driving.

When the refueling operator opens the refueling nozzle 16, the oil liquid 3 discharged from the pump 4 is transferred to the oil delivery pipe 7,
Branch pipe section 8A, fixed pipe 12, flow meter 13, hose 15
The fuel reaches the refueling nozzle 16 via the, and the refueling nozzle 16 refuels the vehicle. Then, after that, when the refueling operator closes the refueling nozzle 16 and hangs it on the nozzle hook 17, the nozzle switch 18 opens and the refueling control unit 2
Since the output of the refueling permission signal from 0 also stops, the pump 4
Is stopped.

Next, the weighing machine 10A which is a feature of this embodiment.
The refueling control process of each refueling control unit 20 provided in (10B, 10C) and the diagnostic control process when a failure occurs will be described with reference to FIGS. 4 and 5.

First, in the main refueling control process shown in FIG. 4, when the processing operation is started, a normal refueling sequence is carried out in step 1, and for example, the weighing machine 10A (10B, 10B).
At the time of starting the refueling operation of C), the nozzle switch 18 is closed to reset the previous display value of the display 19 to zero, and the first function of outputting a refueling permission signal to the pump drive control circuit 21 and the flow rate pulse. The second function of counting the pulses from the transmitter 14 and displaying the amount of refueling on the display 19 and the output of the refueling permission signal to the pump drive control circuit 21 by opening the nozzle switch 18 at the end of refueling work. And a third function etc. for stopping.

Next, at step 2, it is checked whether or not the count value of the counter C is equal to or larger than a preset count value C0 (for example, 5 degrees) by the diagnostic control processing (interrupt processing) described later shown in FIG. While the determination is "NO", the normal refueling sequence according to step 1 is continued.

When it is determined to be "YES" in step 2, the count value of the counter C becomes a predetermined count value C0 or more (for example, the tilt angle θ is 5 degrees or more) and the weighing machine 10A.
Since (10B, 10C) seems to have fallen or tilted due to a vehicle collision or the like, the process moves to step 3 and the valve opening / closing signal for the solenoid valve 27A (27B, 27C) is set to the valve closing signal (= 0), This valve closing signal is sent to the control device 23 shown in FIG.
To the AND control circuit 24 and the AND circuit 26.

Here, the diagnostic control process at the time of failure occurrence shown in FIG. 5 is executed as an interrupt process every 5 msec, for example, and in step 11, the inclination sensor 29A (29B, 29).
The tilt angle θ from C) is read, and the process moves to step 12 to determine whether the tilt angle θ has increased. When the determination in step 12 is “YES”, the process proceeds to step 13 and every time the inclination angle θ of the weighing machine 10A (10B, 10C) increases by 1 degree,

[0044]

## EQU1 ## Calculation of C ← C + 1 is performed to increment the count value of the counter C by "1", and the process returns at step 14.

Next, in the refueling control process by the control device 23 shown in FIG. 6, the normal refueling sequence is performed in step 21, and for example, the valve opening / closing signal output from the refueling control unit 20 of the weighing machine 10A (10B, 10C) is output. Based on the valve opening signal and the like, the shutoff control unit 24 closes the switch 25 to apply a voltage from the power source 22 to the electromagnetic valve 27A (27B, 27C) to open the electromagnetic valve 27A (27B, 27C). . Further, the pump drive control circuit 21 drives the pump 4 to rotate based on the oil supply permission signal output from the oil supply control unit 20 of the weighing machine 10A (10B, 10C), and when the output of the oil supply permission signal is stopped, pump drive control is performed. The circuit 4 stops the pump 4.

Next, at step 22, it is judged at step 3 shown in FIG. 4 whether or not the valve closing signal is output from the oil supply control unit 20 of the weighing machine 10A (10B, 10C), and the result is "NO". During the determination, the normal refueling sequence in step 21 is continued.

When it is determined to be "YES" in step 22, it means that, for example, the weighing machine 10A (10B, 10C) has fallen or tilted due to a vehicle collision or the like. The valve opening / closing signal for the solenoid valves 27A (27B, 27C) output from 24 is set as the valve closing signal (= 0), and this valve closing signal is output to the AND circuit 26 shown in FIG.

As a result, the AND circuit 26 takes the logical product of the valve opening / closing signals output from the refueling control unit 20 and the shut-off control section 24, and the electromagnetic valve 27A (27).
B, 27C) is closed. Then, the shut-off control unit 24 of the control device 23 receives the feedback signal from the electromagnetic valve 27A (27B, 27C), and the electromagnetic valve 27A (27B, 27B, 27C).
27C) is monitored for open / closed states, and the solenoid valves 27A, 27
When either B or 27C is closed, the switch 25 corresponding to the electromagnetic valve 27A, 27B or 27C in the closed state is shut off, and the power supply from the power source 22 is stopped.

Further, a notification lamp 32A (32B, 32C) provided corresponding to the weighing machine 10A (10B, 10C).
Is controlled in the same manner as the solenoid valve 27A (27B, 27C), and the tilt angle θ from the tilt sensor 29A (29B, 29C) becomes 5 degrees or more, and the weighing machine 10A (10B,
When 10C) falls or is inclined due to a vehicle collision or the like, a lamp is lit to notify that a trouble has occurred in the refueling work of the corresponding weighing machine 10A (10B, 10C).

Thus, according to this embodiment having such a configuration, a plurality of weighing machines 10 provided on the site 1 of the gas station are provided.
Of the A, 10B, and 10C, if the weighing machine 10C falls or is tilted due to a vehicle collision or the like, the solenoid valve 27C can be automatically closed based on the signal from the tilt sensor 29C, and the downstream side It is possible to immediately shut off the supply of the oil liquid 3 from the pump 4 to the weighing machine 10C, and to make sure that the notification lamp 32C is turned on to reliably notify that the refueling work by the weighing machine 10C has failed. be able to.

If the weighing machine 10B falls or is tilted due to a vehicle collision or the like, the solenoid valve 27B can be automatically closed based on the signal from the tilt sensor 29B, and the oil from the pump 4 can be closed. Liquid 3 has a weighing machine 10 on the downstream side
It is possible to immediately shut off the supply to B and 10C, and it is possible to reliably notify that the refueling work by the weighing machines 10B and 10C has failed by lighting both the notification lamps 32B and 32C.

Furthermore, if the weighing machine 10A is overturned or tilted due to a vehicle collision or the like, the solenoid valve 27A can be automatically closed based on the signal from the tilt sensor 29A, and the oil from the pump 4 can be closed. It is possible to prevent the liquid 3 from being supplied to all the weighing machines 10A, 10B, 10C on the downstream side, and to turn on the notification lamps 32A, 32B, 32C together for refueling work by the weighing machines 10A, 10B, 10C. It is possible to reliably notify that a failure has occurred.

On the other hand, the weighing machine 10 installed on the site 1 of the gas station
In order to add A, 10B, and 10C, for example, when another weighing machine (hereinafter referred to as an additional weighing machine) is added to the right side of the weighing machine 10C shown in FIG. After removing 9, the tip end side of the oil feed pipe 7 is further extended by another oil feed pipe or the like, and a branch pipe portion similar to the branch pipe portion 8A (8B, 8C) is additionally provided at an intermediate portion thereof. , It is possible to easily add the additional weighing machine.

Therefore, according to the present embodiment, even when the weighing machine is added, the work of adding the weighing machine can be easily performed by extending (extending) the tip side of the oil feed pipe 7. , A plurality of weighing machines 10A, 10B, 10C, etc., even if any one of the weighing machines has a trouble in the refueling work, this can be detected early, and the solenoid valve 27A (27B, 27B,
27C) etc. can be immediately closed. And
The oil liquid 3 in the oil supply pipe 7 is appropriately cut off by cutting off the midway portion of the oil supply pipe 7 with the electromagnetic valve 27A (27B, 27C) or the like.
Can be reliably prevented from leaking to the outside, and safety and reliability can be effectively improved.

Further, when a trouble occurs in the refueling work in any of the weighing machines 10A to 10C, the alarm lamp 32A (32B, 32C) corresponding thereto is turned on so that the refueling worker is in trouble. In addition to being able to reliably notify, the refueling worker can notify the alarm lamp 32A (32B, 32
By checking C), weighers 10A, 10B, 1
It is possible to easily distinguish which of the weighing machines, such as 0C, can continue the refueling work.

Further, the shut-off control section 24 of the control device 23 is constructed so as to monitor the open / closed state of the electromagnetic valve 27A (27B, 27C) by the feedback signal from the electromagnetic valve 27A (27B, 27C). Solenoid valve 27
When any one of A, 27B and 27C is closed, the switch 25 corresponding to the solenoid valve 27A, 27B or 27C in the closed state can be immediately shut off based on the feedback signal, and the closed solenoid valve 27A, 27B or 2
By stopping the power supply from the power source 22 to the 7C, various effects such as double safety can be secured.

The counter C is reset to zero by depressing a reset switch (not shown) after the inspector confirms that the weighing machine is not tilted at the time of periodic inspection of the fueling device.

Next, FIGS. 7 to 12 show a second embodiment of the present invention. The feature of this embodiment is that the liquid supply piping for supplying the oil liquid from the pump to the respective measuring machines, It is formed as a double pipe composed of an inner pipe part and an outer pipe part, and a plurality of weighings are formed by defining an oil liquid leakage detection space between the inner pipe part and the outer pipe part of the double pipe. It is configured so that it can be detected at an early stage which one of the measuring machines has a fault due to the leakage of the oil liquid. In this embodiment, the same components as those in the first embodiment are designated by the same reference numerals,
The description is omitted.

In the figure, 41 is a liquid feed pipe for feeding the oil liquid 3 discharged from the pump 4 toward the weighing machines 10A, 10B, 10C in the direction of arrow A, and 42 is a part of the liquid feed pipe 41. The oil feed pipe 42 constitutes a so-called crossover pipe similar to the oil feed pipe 7 described in the first embodiment.
For example, three branch pipe portions 43A, 43B, 43C are provided in the middle of the branch portion at intervals in the length direction. However, as shown in FIG. 8, the oil feed pipe 42 is composed of a long metal pipe or the like, and an inner pipe portion 44 through which the oil liquid 3 from the pump 4 flows, and an inner pipe portion 44 surrounding the inner pipe portion 44 from the outside in the radial direction. An oil liquid leak detection space 4 between the inner pipe portion 44 and the inner pipe portion 44.
It is formed as a double pipe from the outer pipe portion 46 that defines the part 5.

Here, the leak detection space 45 defined between the inner pipe portion 44 and the outer pipe portion 46 of the oil feed pipe 42 is, for example, three leak detection spaces 45 between solenoid valves 48A, 48B and 48C described later. They are formed as closed spaces that are separated from each other and are shielded from the outside air. Further, the branch pipe portions 43A, 43B, 43C are also formed as double pipes similarly to the oil feed pipe 42, and the branch pipe portions 43A, 43B, 4
Each of the leakage detection spaces 3C communicates with each of the leakage detection spaces 45 on the oil pipe 42 side. Further, the tip end side of the oil feed pipe 42 is closed by a cap body 47, and the cap body 47 seals the inner pipe portion 44 at the tip end side thereof, and at the same time, the outer pipe portion 4
The leak detection space 45 is sealed at the tip side of 6.

48A, 48B and 48C are each weighing machine 10A
10C, 1st, 2nd, and 3rd solenoid valves as cutoff valves respectively provided in the middle of the oil feed pipe 42 are shown,
The solenoid valves 48A to 48C have substantially the same structure as the solenoid valves 27A to 27C described in the first embodiment, and the first solenoid valve 48A is located between the branch pipe portion 43A and the leakage prevention valve 28. Is arranged in the middle of the oil feed pipe 42. Then, the first solenoid valve 48A opens and closes the inner pipe portion 44 of the oil feed pipe 42 at an intermediate position, and when the valve is closed, all the weighing machines 10 on the downstream side are closed.
The oil liquid 3 from the pump 4 is blocked from flowing toward A, 10B and 10C.

The second solenoid valve 48B has a branch pipe portion 43
It is located between A and 43B and is arranged in the middle of the oil feed pipe 42,
When the valve is closed, the inner pipe portion 44 is shut off before and after that to prevent the oil liquid 3 from the pump 4 from flowing toward the downstream weighing machines 10B and 10C. The third solenoid valve 48C is located between the branch pipe portions 43B and 43C and is disposed in the middle of the oil feed pipe 42. When the valve is closed, the inner pipe portion 44 is shut off before and after it, so that The oil liquid 3 from the pump 4 is prevented from flowing toward the weighing machine 10C.

49A, 49B and 49C are weighing machines 10A.
First to second as failure detecting means (leakage sensor) provided in the middle of the oil feeding pipe 42 corresponding to 10C to 10C, respectively.
A third pressure sensor is shown, the pressure sensors 49A-49C
Of these, the first pressure sensor 49A is a solenoid valve 48A, 48B.
8 is attached to the outer pipe portion 46 of the oil feed pipe 42 as shown in FIG. 8 to detect a pressure change in the leak detection space 45 formed between the electromagnetic valves 48A and 48B.

The second pressure sensor 49B is the solenoid valve 4
8B and 48C, which is attached to an intermediate portion of the outer pipe portion 46 and detects a pressure change in the leak detection space 45 formed between the solenoid valves 48B and 48C. Further, the third pressure sensor 49C is located between the electromagnetic valve 48C and the cap body 47, is attached to an intermediate portion of the outer pipe portion 46, and is a leakage detection space 45 formed between the electromagnetic valve 48C and the cap body 47. Detect pressure change inside.

Here, these pressure sensors 49A (49
As shown in FIG. 9, B, 49C) outputs a detection signal VA (VB, VC) corresponding to the pressure in the leak detection space 45 to the control device 51 described later. Then, for example, when the inner pipe portion 44 is damaged or damaged at an intermediate portion of the oil feed pipe 42 and the oil liquid 3 in the inner pipe portion 44 leaks to the leak detection space 45, the pressure in the leak detection space 45 rises. From the pressure sensor 49A (49B, 49C) to the detection signal VA (V
B, VC) is gradually increased, and when the detection signal VA (VB, VC) becomes equal to or greater than the set value V0, the control device 51 causes the control device 51 shown in FIG.
It is determined that the oil liquid 3 has leaked by the diagnostic control process described later.

50A, 50B and 50C are weighing machines 10A
10C as the first and second notification means provided corresponding to
The second and third notification lamps are shown, and the notification lamp 50A
(50B, 50C) is connected to the output side of the control device 51 as shown in FIG. 10, for example, the oil liquid 3 leaks in the middle of the oil feed pipe 42, or the weighing machine 10A (10B, 10C) collides with a vehicle. Inclination with 10A (10
(B, 10C), the operation is controlled together with the solenoid valve 48A (48B, 48C) when a trouble occurs in the refueling work.

Then, the first, second and third notification lamps 5
0A, 50B, 50C are provided at appropriate positions that are easy for the refueling operator to see, corresponding to the respective weighing machines 10A (10B, 10C).
B, 50C) to turn on the weighing machine 10A.
This is for notifying the refueling worker that a trouble has occurred in the refueling work by (10B, 10C). The notification lamp 50A (50B, 50C) may be provided in each casing 11 of the weighing machine 10A (10B, 10C) as in the notification lamp 32A (32B, 32C) described in the first embodiment. Good.

Further, reference numeral 51 denotes a controller provided outside each of the weighing machines 10A to 10C and constituted by a microcomputer or the like. The controller 51 is almost the same as the controller 23 described in the first embodiment. The solenoid valve 48A (48B, 48C) and the notification lamp 50A having the same function, for example, based on a signal from the tilt sensor 29A (29B, 29C) provided in the weighing machine 10A (10B, 10C) shown in FIG.
It is configured to control the operation of (50B, 50C).

Further, as shown in FIG. 10, the control device 51 has first, second and third pressure sensors 49 on the input side.
A, 49B, 49C, etc., and the output side is connected to the first, second and third electromagnetic valves 48A, 48B, 48C and the first, first
It is connected to the second and third notification lamps 50A, 50B, 50C and the like. The control device 51 stores the programs and the like shown in FIGS. 11 and 12 in its storage circuit, and performs refueling control processing, diagnostic control processing in the event of oil leakage, and the like.

In the memory circuit of the controller 51, the pressure sensor 49A (49B, 49B) is provided in the memory area 51A.
The set value V0 for determining whether the detection signal VA (VB, VC) from C) is at an abnormal level, and FIG.
The oil leak determination flags FA (FB, FC) and the like shown in 2 and the like are stored. Here, the oil leak determination flags FA, F
B and FC are set to zero (FA, FB, FC = 0) in advance, and when any one of the detection signals VA (VB, VC) becomes an abnormal level and it is judged that oil has leaked, FA = 1 ( F
B = 1, FC = 1).

Next, the control device 51 which is a feature of this embodiment.
The refueling control process and the diagnostic control process at the time of oil leakage according to FIG. 11 will be described with reference to FIGS.

First, in the main refueling control process shown in FIG. 11, when the processing operation is started, the normal refueling sequence is performed in step 31 as in the case of the first embodiment. At this time, all the solenoid valves 48A, 48B, 48C
Is opened in advance, and all the notification lamps 50A, 50
Hold B and 50C in the off state.

Next, at step 32, the oil leakage determination flag FC is executed by the diagnostic control processing (interrupt processing) shown in FIG.
, It is judged whether FC is switched to FC = 1 and "N
When it is determined to be "O", the detection signal VC from the third pressure sensor 49C is at a normal level, and for example, the solenoid valve 48C
Since there is no oil leakage from the oil feed pipe 42 between the cap body 47 and the cap body 47, the routine proceeds to step 33, where at least the third solenoid valve 48C is held in the open state.

When it is determined to be "YES" in step 32, the detection signal V from the third pressure sensor 49C is detected.
Since C is an abnormal level and there is oil leakage from the oil feed pipe 42 between the solenoid valve 48C and the cap body 47, for example, the routine proceeds to step 34, where the third solenoid valve 48C
Is closed, and the third notification lamp 50C is turned on to notify the refueling worker or the like that a trouble has occurred in the refueling work by the weighing machine 10C.

Next, at step 35, it is judged if the oil leak judgment flag FB is switched to FB = 1.
When it is determined to be "NO", the detection signal VB from the second pressure sensor 49B is at a normal level, and for example, the solenoid valve 4
Since there is no oil leakage from the oil feed pipe 42 between 8B and 48C, the routine proceeds to step 36, where at least the second solenoid valve 48B is held in the open state.

If "YES" is determined in the step 35, the detection signal V from the second pressure sensor 49B is detected.
Since B is at an abnormal level and there is an oil leak from the oil feed pipe 42 between the solenoid valves 48B and 48C, for example,
In step 37, the second electromagnetic valve 48B is closed, and the second and third notification lamps 50B and 50C are turned on to indicate that the refueling work by the weighing machines 10B and 10C has failed. Notify workers etc.

Next, at step 38, it is judged if the oil leak judgment flag FA has been switched to FA = 1.
When it is determined to be "NO", the detection signal VA from the first pressure sensor 49A is at a normal level and, for example, the solenoid valve 4
Since there is no oil leakage from the oil feed pipe 42 between 8A and 48B, the routine proceeds to step 39, where at least the first solenoid valve 48A is kept open.

When it is judged "YES" in step 38, the detection signal V from the first pressure sensor 49A is detected.
Since A is an abnormal level, and there is oil leakage from the oil supply pipe 42 between the solenoid valves 48A and 48B, for example,
Moving to step 40, the first solenoid valve 48A is closed and all the notification lamps 50A, 50B, 50C are turned on, and the fact that a trouble has occurred in the refueling work by the weighing machines 10A, 10B, 10C is refueled. Notify workers etc.

Here, the diagnostic control process at the time of oil leak shown in FIG. 12 is executed as an interrupt process every 5 msec, for example, and in step 41, the first, second and third pressure sensors 49 are used.
Detection signals VA and VB from A, 49B and 49C, respectively
, VC are read, and the process moves to step 42 to detect signal VA.
Is greater than or equal to the set value V0 shown in FIG.

When it is determined to be "YES" in step 42, it is determined that the detection signal VA from the pressure sensor 49A is at an abnormal level and, for example, oil leaks from the oil feeding pipe 42 between the solenoid valves 48A and 48B. Since it is possible, move to step 43, and set the oil leakage determination flag FA to FA = 1.
After that, the process moves to step 48 and returns.

When it is determined to be "NO" in step 42, the routine proceeds to the next step 44, where the detection signal VB from the second pressure sensor 49B is the set value V0 shown in FIG.
It is determined whether or not the above. When it is determined “YES” in step 44, the pressure sensor 49
Since the detection signal VB from B is at an abnormal level and it can be determined that oil has leaked from the oil feed pipe 42 between the solenoid valves 48B and 48C, the routine proceeds to step 45, where the oil leakage determination flag FB is set to FB = 1. Switch to, and then step 4
Move to 8 and return.

Further, when it is judged "NO" at step 44, the routine proceeds to the next step 46, where the detection signal VC from the third pressure sensor 49C is the set value V shown in FIG.
It is determined whether it is 0 or more. When it is determined “YES” in step 46, the pressure sensor 4
The detection signal VC from 9C is at an abnormal level, and for example, it can be determined that oil leakage has occurred from the oil feed pipe 42 between the solenoid valve 48C and the cap body 47. Therefore, the routine proceeds to step 47, where the oil leakage determination flag FC is set. , FC = 1 and after that, it moves to step 48 and returns.

Thus, also in this embodiment having such a configuration, the operation control of the solenoid valve 48A (48B, 48C) and the notification lamp 50A (50B, 50C) is performed based on the signal from the inclination sensor 29A (29B, 29C). Can run,
Although it is possible to obtain substantially the same operational effects as the first embodiment, particularly in this embodiment, the oil feed pipe 42 is formed as a double pipe, and the inner pipe portion 44 and the outer pipe portion 46 of the oil feed pipe 42 are formed.
A leakage detection space 45 for the oil liquid is defined between the solenoid valve 48 and the oil supply pipe 42 (outer pipe portion 46), and a solenoid valve 48 is provided in the middle portion thereof.
Since the pressure sensors 49A, 49B, and 49C are provided at positions A, 48B, and 48C, respectively, the following operational effects are achieved.

That is, based on the detection signal VC from the pressure sensor 49C provided corresponding to the weighing machine 10C among the plurality of weighing machines 10A, 10B, 10C provided on the site 1 of the gas station, for example, the electromagnetic valve 48C Whether or not an oil leak has occurred from the oil feed pipe 42 with the cap body 47 can be accurately determined, and when an oil leak occurs, the solenoid valve 48C can be closed to prevent any further oil leak quickly. Notification lamp 5
By lighting 0C, it is possible to reliably inform the refueling operator or the like that a trouble has occurred in the refueling work by the weighing machine 10C.

Further, the oil feeding pipe 42 corresponding to the weighing machine 10B
If an oil leak occurs at a midway point (between the solenoid valves 48B and 48C), the detection signal V from the pressure sensor 49B is detected.
The electromagnetic valve 27B can be automatically closed based on B, and the oil liquid 3 from the pump 4 can be immediately blocked from being supplied toward the weighing machines 10B, 10C on the downstream side, and the notification lamps 50B, 50C can be provided. Are turned on together and the weighing machines 10B and 10C are turned on.
It is possible to reliably notify that a trouble has occurred in the refueling work due to.

Further, the oil feeding pipe 4 corresponding to the weighing machine 10A
If an oil leak occurs in the middle of 2 (between the solenoid valves 48A and 48B), the solenoid valve 27A can be immediately closed based on the detection signal VA from the pressure sensor 49A, and the oil liquid from the pump 4 can be closed. 3 is all the weighing machines 10A, 10 on the downstream side
It is possible to block the supply to B and 10C,
The notification lamps 50A, 50B, and 50C can be turned on together to reliably notify that the refueling work by the weighing machines 10A, 10B, and 10C has failed.

Therefore, in the present embodiment, the oil liquid leakage detection space 45 is provided in the oil feeding pipe 42 consisting of double pipes.
A plurality of pressure sensors 49A, 49B are formed corresponding to A, 10B, 10C, and pressure changes in the respective leak detection spaces 45 are detected by pressure sensors 49A, 49.
By detecting with B and 49C, it is possible to detect the leak time of the oil liquid 3 at an early stage, and accurately determine which of the weighing machines 10A, 10B, and 10C is causing a failure in the refueling work. Leakage of oil liquid from the solenoid valves 48A, 48B,
It can be reliably prevented at 48C.

Further, the number of leak sensors (pressure sensors 49A to 49C) can be reliably reduced as compared with the prior art, the detection accuracy at the time of oil leakage can be greatly improved, and oil can be supplied by a usable weighing machine. There are various effects such that the work can be appropriately continued.

In each of the above embodiments, the weighing machine 10A,
Solenoid valves 27A, 27B, 27C (48A, 48A, as a shutoff valve) corresponding to 10B, 10C in the middle of the oil supply pipe 7 (42)
48B, 48C) are provided, but instead of this, for example, a shutoff valve whose opening and closing are controlled by pilot pressure (air pressure or hydraulic pressure) from the outside may be used.

In the second embodiment, the failure detecting means (leakage sensor) is replaced by pressure sensors 49A, 49B and 49C.
As a result of the pressure change in the leak detection space 45, the inner pipe portion 4
Although the leakage of the oil liquid from No. 4 is detected, the present invention is not limited to this, and the failure detecting means is constituted by a gas sensor and the oil from the inner pipe section 44 is changed due to the change of the oil vapor concentration in the leakage detection space 45. Liquid leakage may be detected.

[0091]

As described above in detail, in the invention described in claim 1, one end side is connected to the pump in the underground tank, and the other end side is provided at a plurality of intermediate positions of the liquid delivery pipe extending outside the underground tank. A branch pipe section is provided, and a weighing machine is connected to the tip end side of each branch pipe section, and if any of the weighing machines has a trouble in refueling work, this is used as a weighing machine. By detecting with any one of the corresponding failure detection means, the flow of the oil liquid from the pump to the side of the weighing machine where the failure has occurred is blocked by either shut-off valve, and the alarm means determines which side of the weighing machine. Since it is configured to notify if a failure has occurred, even if a failure occurs on one of the weighing machines, it can be detected early.
It is possible to reliably prevent the oil liquid from leaking. And
In addition to greatly improving the reliability and safety of the refueling device, in the case of additional construction of a weighing machine, the tip side of the liquid delivery pipe should be extended (extended) to add a weighing machine. Can be done easily.

In this case, as in the second aspect of the invention, a tilt sensor as a failure detecting means is provided for each weighing machine, and the attitude abnormality of the weighing machine is detected from the change in the tilt of each weighing machine. Therefore, even if the vehicle collides with one of the weighing machines and the weighing machine has an abnormal posture (tilt), and if any of the weighing machines fails to refuel, this can be detected early. Therefore, it is possible to reliably prevent the oil liquid from leaking from the inside of the weighing machine in which the trouble has occurred.

Further, as in the invention described in claim 3, the liquid supply pipe is formed as a double pipe, and the liquid supply pipe for detecting leakage of the oil liquid is provided between the inner pipe part and the outer pipe part. A space is defined and a plurality of leak sensors are provided between the shutoff valves in the middle part of the outer pipe part corresponding to each weighing machine, so that the oil liquid in the inner pipe part is a space for leak detection. It is possible to detect whether or not the oil has leaked to the vehicle at an early stage, accurately determine which of the weighing machines has a trouble in the fueling work, and reliably prevent further leakage of the oil liquid. Further, the number of leak sensors can be surely reduced as compared with the conventional technique, the detection accuracy at the time of oil leak can be significantly improved, and the refueling work by the usable weighing machine can be appropriately continued.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an oil supply device according to a first embodiment of the present invention.

FIG. 2 is a control block diagram showing an oil supply control unit of each weighing machine, a shutoff control unit of a solenoid valve, and the like.

FIG. 3 is an operation explanatory view of the tilt sensor shown in FIG.

FIG. 4 is a flowchart showing a refueling control process by a refueling control unit.

FIG. 5 is a flow chart showing a diagnosis control process by the refueling control unit when a failure occurs.

FIG. 6 is a flowchart showing a refueling control process by the control device.

FIG. 7 is a configuration diagram showing an oil feed pipe, respective solenoid valves, respective measuring machines and the like of an oil supply device according to a second embodiment.

FIG. 8 is a partial vertical cross-sectional view showing an enlarged oil supply pipe and pressure sensor in FIG.

FIG. 9 is a characteristic diagram showing a detection signal of a pressure sensor.

FIG. 10 is a control block diagram showing a pressure sensor, a control device, a solenoid valve, and the like.

FIG. 11 is a flowchart showing refueling control processing by the control device.

FIG. 12 is a flow chart showing a diagnostic control process at the time of oil leakage by the control device.

[Explanation of symbols]

2 Underground tank 3 Oil liquid 4 Pump 5,41 Liquid feeding pipe 6 Pumping pipe 7,42 Oil feeding pipe 8A, 8B, 8C, 43A, 43B, 43C Branch pipe portion 9,47 Cap body 10A, 10B, 10C Measuring machine 20 Refueling control unit (signal output means) 21 Pump drive control circuit (pump drive control means) 23, 51 Control device 27A, 27B, 27C, 48A, 48B, 48C Electromagnetic valve (shutoff valve) 29A, 29B, 29C Tilt sensor (fault) Detecting means) 32A, 32B, 32C, 50A, 50B, 50C Informing lamp (informing means) 44 Inner tube portion 45 Leak detection space 46 Outer tube portions 49A, 49B, 49C Pressure sensor (leak sensor)

Claims (3)

[Claims] 1. An underground tank for storing oil liquid, a submersible pump provided so as to be immersed in the oil liquid in the underground tank, one end side connected to the pump and the other end side outside the underground tank. And a plurality of weighing machines provided with a liquid supply pipe having a plurality of branch pipe parts in the middle part and an oil supply nozzle connected to the tip side of each branch pipe part of the liquid supply pipe for performing oil supply work, respectively. , A plurality of signal output means provided in each of the weighing machines and outputting a refueling permission signal based on the state of the refueling nozzle, and based on the output of the refueling permission signal from any one of the signal output means. Pump drive control means for driving and controlling the pump, a plurality of failure detection means provided corresponding to each of the weighing machines for detecting whether or not a failure has occurred in refueling work by each of the weighing machines, In the middle of liquid piping, and each of the above Provided between the branch pipes,
A plurality of shutoff valves for shutting off the flow of the oil liquid on the upstream side of the weighing machine corresponding to the fault detection means based on the signals from the respective fault detection means, and the shutoff valves provided respectively corresponding to the weighing machines. A refueling device comprising a plurality of notifying means for notifying which of the weighing machines has a failure based on a signal from the failure detection means. 2. The refueling device according to claim 1, wherein each of the fault detecting means is constituted by a tilt sensor which is provided for each weighing machine and detects a change in the tilt of each weighing machine. 3. An outer pipe part that defines a space between the inner pipe part through which the oil liquid from the pump flows and the inner pipe part that surrounds the inner pipe part from the outside in the liquid supply pipe. While forming as a double pipe consisting of, each of the failure detection means,
Provided between the shutoff valves in the middle of the outer pipe portion,
The oil supply device according to claim 1, wherein the oil supply device is configured by a leak sensor that detects whether oil liquid is leaking from the inner pipe portion to the space.