JP2017030769A - Lubrication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability and safety during maintenance inspection of an oil feeder.SOLUTION: An oil feeder 1 feeds a fuel oil in an underground tank to an oil feeding object such as a vehicle. The oil feeder 1 includes: a body 2 having an oil feed pipe 10 communicating with the underground tank, an oil feed pump 14 which is connected to the oil feed pipe 10 and pumps up the fuel oil in the underground tank, an oil feed motor 15 for driving the oil feed pump 14, and a check valve 13 which is provided at an intake port side of the oil feed pump 14 and prevents the pumped fuel oil from returning to the underground tank when the operation of the oil feed pump 14 is stopped; a container 3 fixedly installed and storing the fuel oil; and a pipeline 33 in which one end is connected to the container 3 and the other end is connected to a connection part 11 provided at the oil feed pipe 10 of the body 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fuel supply device that supplies fuel oil in an underground tank to a fuel supply object such as a vehicle.

  As a fueling device that is installed in a fueling station and pumps up fuel oil in an underground tank buried in the fueling station and supplies it to a fueling target such as a vehicle, for example, a device shown in Patent Document 1 is used. This oil supply apparatus includes equipment such as an oil supply pump, an oil supply motor, a flow meter, and a solenoid valve as liquid feeding means. In addition, an oil supply hose leading to an oil supply pipe connected to the flow meter is drawn out on the front surface or side surface of the oil supply device, and an oil supply nozzle is connected to the tip of the oil supply hose. The fuel supply object can be refueled by inserting the fuel supply nozzle into the fuel tank of the fuel supply object and operating a switch provided in the fuel supply nozzle.

JP 2012-192950 A

  By the way, when performing maintenance inspection and replacement of equipment such as a fuel pump, a flow meter, and a solenoid valve provided in the fuel filler, it is necessary to discharge the fuel oil in the fuel pipe. Therefore, in such a case, the fuel oil in the oil supply pipe downstream from the check valve provided between the underground tank and the oil supply pump is discharged to a portable fuel container or the like, and the fuel oil in the container is passed through the oil supply pipe. And returned to the underground tank.

  However, if the operator moves the portable fuel container or spills the fuel oil when returning the fuel oil in the container to the lubrication pipe, there is a problem that a fire or the like may occur due to static electricity or the like.

  Accordingly, the present invention has been made in view of the above-described problems in the prior art, and an object thereof is to provide an oil supply apparatus that improves workability and safety during maintenance and inspection.

  In order to achieve the above object, the present invention is an oil supply device for supplying fuel oil in an underground tank to an object to be supplied such as a vehicle, and is connected to an oil supply pipe communicating with the underground tank, the oil supply pipe, A fuel pump that pumps up the fuel oil in the underground tank, a fuel motor that drives the fuel pump, and a fuel pump that is pumped up when the fuel pump stops operating, provided on the suction port side of the fuel pump. A main body having a check valve for preventing return of oil to the underground tank, a container that is fixedly installed and stores fuel oil, one end is connected to the container, and the other end is connected to the oil supply pipe of the main body And a pipe connected to the provided connecting portion.

  According to the present invention, since the pipe connected to the fixedly installed container is connected to the oil supply pipe via the connecting portion, the container is stored in the container without moving it during maintenance and inspection. The used fuel oil can be discharged to the underground tank or reused so as to be refueled to the refueling object, and the danger due to movement can be prevented as in the conventional case.

  In the fueling device, the connecting portion may be provided on the upstream side of the check valve. Thereby, discharge of the fuel oil stored in the container to the underground tank and refueling to the refueling object can be easily performed.

  In the fuel supply apparatus, an upper limit sensor that detects whether or not the fuel oil to be stored has reached an upper limit amount is provided in the container, and the main body is configured to detect fuel in the container based on a detection result by the upper limit sensor. When the oil reaches the upper limit, the driving of the oil supply motor can be stopped. Thereby, when the fuel in the main body is collected in the container for maintenance inspection or the like, it is possible to prevent the fuel stored in the container from overflowing.

  In the fueling device, the container is provided with a lower limit sensor for detecting whether or not the stored fuel oil falls below a lower limit amount, and the pipe is opened and closed for discharging or stopping the discharge of the fuel oil in the container. A valve is provided, and the main body can close the on-off valve when the fuel oil in the container falls below a lower limit amount based on a detection result by the lower limit sensor.

  As described above, according to the present invention, it is possible to improve workability and safety at the time of maintenance and inspection of the fueling device.

It is the schematic which shows one Embodiment of the oil supply apparatus which concerns on this invention. It is a flowchart which shows the flow of the process which collect | recovers the fuel oil in a fueling apparatus main body to a container. It is a flowchart which shows the flow of the process which discharges | emits the fuel oil in a container to an underground tank. It is a flowchart which shows the flow of the process which supplies the fuel oil in a container to a refueling target object.

  Next, an embodiment for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an embodiment of an oil supply apparatus according to the present invention, and the oil supply apparatus 1 includes a main body 2 and a container 3 fixedly installed in the vicinity of the main body 2.

  The main body 2 is roughly divided into a connecting portion 11, a first on-off valve 12, a check valve 13, an oil supply pump 14, an oil supply motor 15, an electromagnetic valve 16, a flow meter 17, a nozzle switch 18, a second on-off valve 19, and a display. The oil supply pipe 10 is connected to an underground tank (not shown) that is embedded in the basement of a gas station or the like.

  The connecting portion 11 is provided at an end portion of the oil supply pipe 10 and is connected to each pipe connected to a first on-off valve 12 and a second on-off valve 19 described later.

  As for the 1st on-off valve 12, the connection part 11 is connected to the inlet side, and the check valve 13 mentioned later is connected to the outlet side. The first on-off valve 12 opens and closes based on the control of an oil supply control device 22 described later, and is in an “open” state during normal oil supply. Further, when the fuel oil in the oil supply pipe (pipe) connecting each device in the main body 2 is collected in the container 3, the first on-off valve 12 is set to the “closed” state.

  The check valve 13 is provided on the suction port side of the oil pump 14 to be described later, flows only the fuel oil flowing in from the first on-off valve 12 side, and returns to the underground tank side when the fuel pump 14 is stopped. To prevent.

  The oil supply pump 14 is driven by an oil supply motor 15 that operates based on the control of the oil supply control device 22, and the suction port side of the oil supply pump 14 is connected to the first on-off valve 12. Further, the discharge side of the oil supply pump 14 is connected to the electromagnetic valve 16. In this example, the check valve 13 and the oil pump 14 are configured separately. However, the present invention is not limited to this. For example, the check valve 13 is provided on the suction port side of the oil pump 14, and the check valve 13 and the oil pump are provided. 14 may be integrally formed.

  The solenoid valve 16 has an oil supply pump 14 connected to the inlet side and a flow meter 17 to be described later connected to the outlet side. The electromagnetic valve 16 opens and closes based on the control of the fuel supply control device 22 and is normally in a “closed” state. Further, when fuel oil is supplied to the fuel supply object or when the fuel oil in the oil supply pipe is collected in the container 3, the solenoid valve 16 is in the “open” state.

  The flow meter 17 is provided for measuring the amount of oil supply, and has a flow rate pulse transmitter. The flow rate pulse transmitter transmits a signal (pulse) based on the amount of fuel oil flowing through the flow meter 17 to the fuel supply control device 22. The flow meter 17 has an electromagnetic valve 16 connected to the inlet side and an oil supply hose 25 connected to the outlet side.

  An oil supply nozzle 26 is provided at the tip of the oil supply hose 25, and the oil supply nozzle 26 is detachably attached to a nozzle hook (not shown) provided in the main body 2.

  The nozzle switch 18 is installed in the vicinity of the nozzle hook and is turned on / off when the fuel supply nozzle 26 is attached / detached. Specifically, for example, the nozzle switch 18 is turned on when the fueling nozzle 26 is removed from the nozzle hook, and is turned off when the fueling nozzle 26 is hooked on the nozzle hook. The nozzle switch 18 transmits a signal indicating the attachment / detachment state of the fueling nozzle 26 to the fueling control device 22.

  As for the 2nd on-off valve 19, the container 3 is connected to the inlet side via the piping 33 mentioned later, and the connection part 11 is connected to the outlet side. The second on-off valve 19 opens and closes based on the control of the fuel supply control device 22 and is normally in a “closed” state. Further, when the fuel oil in the container 3 is discharged to the underground tank, or when the fuel oil in the container 3 is supplied to the refueling object, the second on-off valve 19 is set to the “open” state.

  The display unit 20 displays the amount of fuel, the amount of fuel, the unit price, and the like based on the control of the fuel supply control device 22.

  The operation unit 21 is provided with operating elements such as buttons and keys for operation when refueling using the main body 2 or when performing maintenance or inspection of the main body 2. When these operators are operated by a user or an operator, the operation unit 21 transmits a signal (operation signal) corresponding to the operation to the fuel supply control device 22.

  In the present embodiment, the operation unit 21 includes first, second, and third maintenance buttons 21A, 21B, and 21C (hereinafter referred to as “first maintenance button 21A”) for operation when performing maintenance and inspection. , “Second maintenance button 21B” and “third maintenance button 21C” are provided as appropriate). The first maintenance button 21 </ b> A is a button for operating when the fuel oil in the oil supply pipe (pipe) connecting each device in the main body 2 is collected in the container 3. The 2nd maintenance button 21B is a button for operating, when discharging the fuel oil in the container 3 to an underground tank. The third maintenance button 21 </ b> C is a button for operating when fuel oil in the container 3 is supplied to the refueling object. The details of each process when the first to third maintenance buttons 21A to 21C are operated will be described later.

  The oil supply control device 22 is provided to control the entire main body 2. Further, the fuel supply control device 22 performs processing associated with the operated operator based on the operation signal received from the operation unit 21 and the signals received from the upper limit sensor 31 and the lower limit sensor 32 of the container 3 described later. As described above, the operation of each device in the main body 2 is controlled.

  The container 3 is for collecting and storing fuel oil in pipes connecting the devices in the main body 2 at the time of maintenance and inspection. The container 3 includes an upper limit sensor 31, a lower limit sensor 32, a pipe 33 and a ground wire 34.

  The upper limit sensor 31 is installed near the upper part of the container 3 and detects whether or not the recovered fuel oil has reached the upper limit amount of the container 3. The upper limit sensor 31 transmits a signal indicating the detection result to the fuel supply control device 22 of the main body 2 when the stored fuel oil reaches the upper limit amount.

  The lower limit sensor 32 is installed in the vicinity of the bottom of the container 3 and detects whether or not the recovered fuel oil has fallen below the lower limit amount of the container 3. The lower limit sensor 32 transmits a signal indicating the detection result to the fuel supply control device 22 when the stored fuel oil falls below the lower limit amount.

  In the pipe 33, the container 3 is connected to the inlet side, and the second on-off valve 19 of the main body 2 is connected to the outlet side. The pipe 33 causes the fuel oil stored in the container 3 to flow to the connecting portion 11 of the main body 2 via the second on-off valve 19 when the second on-off valve 19 of the main body 2 is in the “open” state. .

  The ground wire 34 is provided to release static electricity or the like. The container 3 and the main body 2 are connected by the ground wire 34, and static electricity or the like charged in the container 3 is discharged from the ground through the main body 2.

  Next, operation | movement of the oil supply apparatus 1 which has the said structure is demonstrated. In the fueling device 1 according to the present embodiment, the fuel oil in the pipes connecting the respective devices in the main body 2 can be collected in the container 3 during maintenance and inspection, and the fuel oil collected in the container 3 is underground Can be discharged into the tank. Moreover, in this fueling apparatus 1, the fuel oil collect | recovered by the container 3 can also be fueled to fuel supply objects, such as a vehicle, with the fuel oil pumped up from the underground tank, without discharging | emitting to an underground tank. In the following, (1) the recovery process of the fuel oil in the main body 2 to the container 3, (2) the discharge process of the fuel oil in the container 3 to the underground tank, and (3) the fuel oil in the container 3 to the refueling object The flow of each process of the oil supply process will be described.

(1) Recovery process of fuel oil in the main body 2 into the container 3 First, the flow of the process of recovering the fuel oil in the main body 2 into the container 3 will be described with reference to the flowchart shown in FIG.

  In step S <b> 1, the fuel supply control device 22 determines whether or not the first maintenance button 21 </ b> A has been pressed based on an operation signal from the operation unit 21 by an operator who performs maintenance and inspection. If it is determined that the first maintenance button 21A has been pressed (step S1; Yes), the process proceeds to step S2. On the other hand, if it is determined that the first maintenance button 21A is not pressed (step S1; No), the process returns to step S1, and the process of step S1 is repeated until the first maintenance button 21A is pressed.

  Next, in step S <b> 2, the fuel supply control device 22 determines whether the nozzle switch 18 is “ON” based on a signal from the nozzle switch 18. When it is determined that the oil supply nozzle 26 is removed from the nozzle hook and the nozzle switch 18 is “ON” (step S2; Yes), the first on-off valve 12 is “closed” based on the control of the oil supply control device 22. At the same time, the oil supply motor 15 is turned on, and the electromagnetic valve 16 is opened (step S3).

  As described above, since the first on-off valve 12 is in the “closed” state, the fuel oil is not pumped up from the underground tank even when the oil supply pump 14 is driven. Only the fuel oil inside is discharged from the fuel supply nozzle 26. Therefore, by inserting the fuel supply nozzle 26 into the container 3, the fuel oil in the pipe connecting the devices in the main body 2 can be stored in the container 3.

  On the other hand, if it is determined in step S2 that the fueling nozzle 26 is in the state of being hung on the nozzle and the nozzle switch 18 is “OFF” (step S2; No), the process returns to step S2, and the nozzle The process of step S2 is repeated until the switch 18 is turned “on”.

  Next, in step S4, the fuel supply control device 22 determines whether or not the fuel oil stored in the container 3 has reached the upper limit amount based on the signal from the upper limit sensor 31. When it is determined that the fuel oil in the container 3 has reached the upper limit amount (step S4; Yes), the solenoid valve 16 is set to the “closed” state and the fuel supply motor 15 is turned off based on the control of the fuel supply control device 22. Then, the first on-off valve 12 is in the “open” state (step S5).

  This state is a state in which the upper limit amount that can store the fuel oil in the container 3 is reached even though the fuel oil in the main body 2 is not completely discharged. Therefore, there is a possibility that fuel oil remains in the main body 2, so that it is difficult for an operator to properly perform maintenance and inspection of the main body 2. In such a case, for example, it is preferable to display information indicating that the fuel oil in the container 3 has reached the upper limit amount on the display 20 or the like.

  On the other hand, when it is determined in step S4 that the fuel oil in the container 3 has not reached the upper limit amount (step S4; No), the process proceeds to step S6.

  In step S <b> 6, the fuel supply control device 22 determines whether the nozzle switch 18 is “OFF” based on a signal from the nozzle switch 18. When it is determined that the oil supply nozzle 26 is hooked and the nozzle switch 18 is “OFF” (step S6; Yes), the process proceeds to step S5.

  This state is a state in which the operator determines that the fuel oil in the main body 2 has been completely discharged, finishes discharging the fuel oil, and places the fuel supply nozzle 26 on the nozzle hook. That is, since the fuel oil in the main body 2 is completely discharged, maintenance and inspection of the main body 2 by an operator can be performed appropriately.

  On the other hand, if it is determined in step S6 that the nozzle switch 18 is “ON” with the fuel nozzle 26 removed from the nozzle hook (step S6; No), the process returns to step S4.

  As described above, when the operator presses the first maintenance button 21A, the fuel oil in the main body 2 can be collected into the container 3, and thus maintenance work and the like can be appropriately performed. Further, even when the fuel oil in the container 3 reaches the upper limit amount, the recovery of the fuel oil is terminated based on the signal from the upper limit sensor 31, so that the recovered fuel oil can be prevented from overflowing from the container 3. Safety during maintenance and inspection can be ensured.

(2) Discharge process of fuel oil in container 3 to underground tank Next, the flow of the process of discharging the fuel oil in container 3 to the underground tank will be described with reference to the flowchart shown in FIG.

  In step S <b> 11, the fuel supply control device 22 determines whether the second maintenance button 21 </ b> B has been pressed by an operator who performs maintenance inspection or the like based on the operation signal from the operation unit 21. If it is determined that the second maintenance button 21B has been pressed (step S11; Yes), the second on-off valve 19 is in the “open” state based on the control of the fuel supply control device 22 (step S12).

  On the other hand, when it is determined that the second maintenance button 21B is not pressed (step S11; No), the process returns to step S11, and the process of step S11 is repeated until the second maintenance button 21B is pressed.

  Next, in step S13, the fuel supply control device 22 determines whether or not the fuel oil stored in the container 3 has fallen below the lower limit amount based on the signal from the lower limit sensor 32. When it is determined that the fuel oil in the container 3 has fallen below the lower limit amount (step S13; Yes), the second on-off valve 19 is in a “closed” state based on the control of the fuel supply control device 22 (step S14). This state is a state in which most of the fuel oil stored in the container 3 is discharged to the underground tank via the pipe 33.

  On the other hand, when it is determined in step S13 that the fuel oil in the container 3 is not below the lower limit amount (step S13; No), the process returns to step S13, and the fuel oil in the container 3 falls below the lower limit amount. Step S13 is repeated until most of the fuel oil in the container 3 is discharged to the underground tank.

  Thus, since the fuel oil stored in the container 3 can be discharged to the underground tank when the operator presses the second maintenance button 21B, the recovered fuel oil can be effectively reused. it can. Further, since the fuel oil in the container 3 that is fixedly installed can be discharged to the underground tank via the pipe 33, it is possible to prevent a risk that arises when the recovered fuel oil is moved as in the prior art.

(3) Refueling processing of fuel oil in container 3 with respect to the refueling object Next, the flow of processing for refueling fuel oil in the container 3 to the refueling object will be described with reference to the flowchart shown in FIG.

  In step S <b> 21, the fuel supply control device 22 determines whether the third maintenance button 21 </ b> C has been pressed by an operator who performs maintenance inspection or the like based on the operation signal from the operation unit 21. If it is determined that the third maintenance button 21C has been pressed (step S21; Yes), the process proceeds to step S22. On the other hand, when it is determined that the third maintenance button 21C is not pressed (step S21; No), the process returns to step S21, and the process of step S21 is repeated until the third maintenance button 21C is pressed.

  Next, in step S <b> 22, the fuel supply control device 22 determines whether the nozzle switch 18 is “ON” based on the signal from the nozzle switch 18. When it is determined that the oil supply nozzle 26 is removed from the nozzle hook and the nozzle switch 18 is “ON” (step S22; Yes), the return is made based on the control of the oil supply control device 22 and the oil supply motor 15 is turned “ON”. Further, the second on-off valve 19 is in the “open” state and the electromagnetic valve 16 is in the “open” state (step S23). Thereby, the fuel oil in the underground tank and the container 3 is pumped up.

  On the other hand, if it is determined in step S22 that the oil supply nozzle 26 is in the state where the nozzle is hooked and the nozzle switch 18 is “OFF” (step S22; No), the process returns to step S22, and the nozzle The process of step S22 is repeated until the switch 18 is turned “on”.

  Next, in step S <b> 24, the oil supply control device 22 determines whether or not a flow rate pulse is emitted from the flow rate pulse transmitter of the flow meter 17. If it is determined that the flow rate pulse is generated (step S24; Yes), the counted result is displayed on the display 20 (step S25).

  On the other hand, when it is determined that the flow rate pulse is not generated (step S24; No), the process returns to step S24, and the process of step S24 is repeated until the flow rate pulse is generated.

  Next, in step S26, the fuel supply control device 22 determines whether the fuel oil stored in the container 3 has fallen below the lower limit amount based on the signal from the lower limit sensor 32. When it is determined that the fuel oil in the container 3 has fallen below the lower limit amount (step S26; Yes), the second on-off valve 19 is in a “closed” state based on the control of the fuel supply control device 22 (step S27). This state is a state in which most of the fuel oil stored in the container 3 is supplied to the object to be supplied via the pipe 33, the oil supply pump 14, the oil supply hose 25, and the like.

  On the other hand, when it is determined that the fuel oil in the container 3 is not less than the lower limit amount (step S26; No), the process returns to step S26 until the fuel oil in the container 3 falls below the lower limit amount, that is, the container. The process of step S26 is repeated until most of the fuel oil in 3 is supplied to the refueling object.

  In step S <b> 28, the fuel supply control device 22 determines whether the nozzle switch 18 is “OFF” based on a signal from the nozzle switch 18. When it is determined that the fueling nozzle 26 is hooked and the nozzle switch 18 is “OFF” (step S28; Yes), the solenoid valve 16 is in the “closed” state based on the control of the fueling control device 22. At the same time, the fuel supply motor 15 is turned off (step S29).

  On the other hand, if it is determined in step S28 that the nozzle switch 18 is “ON” with the fuel nozzle 26 removed from the nozzle hook (step S28; No), the process returns to step S24.

  Thus, since the fuel oil stored in the container 3 can be refueled together with the fuel oil pumped up from the underground tank to the refueling object by pressing the third maintenance button 21C by the operator, the recovered fuel Oil can be reused effectively. Further, since the fuel oil in the container 3 that is fixedly installed can be supplied to the refueling object via the pipe 33, it is possible to prevent a risk that occurs when the recovered fuel oil is moved.

  As described above, according to the present embodiment, the fuel oil in the apparatus main body is recovered using the container fixedly installed in the vicinity of the fuel supply apparatus main body, and the recovered fuel oil is not moved. Since it can be reused, it is possible to improve workability and safety during maintenance and inspection of the apparatus main body.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment of the present invention, and various modifications and applications can be made without departing from the gist of the present invention. Is possible. In the above description, the container 3 is described as being fixedly installed in the vicinity of the main body 2. However, the present invention is not limited to this, and the container 3 may be installed inside the main body 2, for example. Thereby, workability | operativity at the time of a maintenance check etc. can be improved more.

DESCRIPTION OF SYMBOLS 1 Oil supply apparatus 2 Main body 3 Container 10 Oil supply pipe 11 Connection part 12 1st on-off valve 13 Check valve 14 Oil supply pump 15 Oil supply motor 16 Solenoid valve 17 Flowmeter 18 Nozzle switch 19 Second on-off valve 20 Indicator 21 Operation part 21A 1st maintenance button 21B 2nd maintenance button 21C 3rd maintenance button 22 Lubrication control device 25 Lubrication hose 26 Lubrication nozzle 31 Upper limit sensor 32 Lower limit sensor 33 Pipe 34 Ground wire

Claims (4)

A fueling device for refueling fuel oil in an underground tank to a refueling object such as a vehicle,
An oil supply pipe communicating with the underground tank;
A fuel pump connected to the fuel pipe and pumping up the fuel oil in the underground tank;
An oil supply motor for driving the oil supply pump;
A main body that is provided on the suction port side of the fuel pump and has a check valve that prevents the pumped fuel oil from returning to the underground tank when the operation of the fuel pump stops.
A fixedly installed container for storing fuel oil;
An oil supply apparatus comprising: a pipe having one end connected to the container and the other end connected to a connecting portion provided in the oil supply pipe of the main body.   The oil supply device according to claim 1, wherein the connecting portion is provided on an upstream side of the check valve. The container has an upper limit sensor for detecting whether or not the stored fuel oil has reached an upper limit amount,
3. The fuel supply according to claim 1, wherein the main body stops driving of the fuel supply motor when the fuel oil in the container reaches an upper limit amount based on a detection result by the upper limit sensor. apparatus. The container has a lower limit sensor that detects whether or not the stored fuel oil has fallen below a lower limit amount,
The pipe is provided with an on-off valve for discharging or stopping the discharge of the fuel oil in the container,
The said main body closes the said on-off valve when the fuel oil in the said container falls below a minimum amount based on the detection result by the said lower limit sensor, The said on-off valve is characterized by the above-mentioned. Refueling device.

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